In-situ shallow stirring equipment

Abstract

The utility model relates to the technical field of in-situ stirring, and particularly discloses in-situ shallow-layer stirring equipment which comprises a connecting arm, a stirring head arranged below the connecting arm, an adjusting mechanism arranged inside one side, close to the stirring head, of the connecting arm and used for adjusting the inclination angle of the stirring head, and a transmission pipe arranged in the connecting arm in a penetrating manner, a spray head is arranged at one end, close to the stirring head, of the conveying pipe, a non-return mechanism is arranged between the conveying pipe and the spray head, the non-return mechanism prevents chemicals or particles from flowing back into the equipment, stepless angle adjustment of the stirring head can be achieved by arranging an adjusting mechanism, special areas such as slopes and wall corners are covered, the equipment is suitable for various use environments and scenes, and the chemicals can be fully and evenly mixed; and by arranging the non-return mechanism, backflow and particle backflow and blockage are prevented, the operation efficiency and the high construction quality are remarkably improved through overall cooperation, and various requirements of shallow soil remediation are met.

Description

Technical Field

[0001] This utility model relates to the field of in-situ mixing technology, specifically to an in-situ shallow mixing device. Background Technology

[0002] In-situ shallow mixing equipment is a specialized engineering device for in-situ treatment of shallow surface soil. Its core is to achieve physical breaking of soil and uniform mixing of functional materials through the coordinated operation of mechanical mixing and functional material transportation. It eliminates the need for excavation and transportation to reduce environmental disturbance. It is usually mounted on construction machinery such as excavators and consists of connecting arms, mixing heads and nozzles. It is widely used in scenarios such as in-situ remediation of contaminated soil, shallow foundation reinforcement, and ecological engineering soil improvement.

[0003] Existing in-situ shallow mixing equipment often uses a fixed-angle design for its mixing head, which cannot adapt to the operational needs of special areas such as slopes, corners, and site edges. This results in insufficient soil mixing and inadequate agent injection in these areas, creating blind spots in the remediation process. Consequently, the agent and soil are poorly mixed, and when the agent delivery stops, agent or clay particles can easily flow back into the transmission pipe, causing pipeline blockage and requiring frequent shutdowns for pipe disassembly and cleaning. Overall, this seriously affects the quality and efficiency of the remediation. Therefore, we propose an in-situ shallow mixing equipment. Utility Model Content

[0004] The purpose of this invention is to provide an in-situ shallow mixing device to solve the problems mentioned in the background art. The mixing heads of existing in-situ shallow mixing devices are mostly designed with a fixed angle, which cannot adapt to the operation requirements of special areas such as slopes, corners, and site edges. This results in insufficient soil mixing and inadequate injection of chemicals in these areas, creating blind spots for remediation. Consequently, the uniformity of chemical mixing with soil is poor, and when the chemical delivery stops, chemical or clay particles are prone to backflow into the transmission pipe, causing pipeline blockage and requiring frequent shutdowns and pipe disassembly for cleaning. Overall, this seriously affects the quality and efficiency of remediation.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an in-situ shallow mixing device, comprising: a connecting arm, a mixing head below the connecting arm, an adjustment mechanism inside the connecting arm near the mixing head, the adjustment mechanism adjusting the tilt angle of the mixing head, a transmission pipe passing through the connecting arm, a nozzle at the end of the transmission pipe near the mixing head, and a backflow prevention mechanism between the transmission pipe and the nozzle to prevent the backflow of reagents or particles into the device.

[0006] The adjusting mechanism includes a fixed plate that is fixedly connected to the inner wall of the connecting arm. The fixed plate is provided with an annular slide rail. A first slider that is symmetrically arranged is slidably connected in the annular slide rail. A mounting base is fixedly connected to the first slider. A rotary motor is fixedly connected to the mounting base. The output end of the rotary motor is fixedly connected to the stirring head. An arc groove is opened in the annular slide rail.

[0007] It also includes: a strip slide rail, which is fixedly connected to a fixed plate, a second slider is slidably connected inside the strip slide rail, a screw is inserted inside the strip slide rail, the screw passes through the second slider and is rotatably connected to the strip slide rail, and a drive motor is fixedly connected to the end of the screw away from the strip slide rail, and the drive motor is fixedly connected to the fixed plate.

[0008] A first rotating rod is fixedly connected to the side of the first slider away from the mounting base. A connecting rod is rotatably connected to the first rotating rod, and a second rotating rod is rotatably connected to the other end of the connecting rod. The second rotating rod is fixedly connected to both ends of the second slider.

[0009] The anti-reverse mechanism includes a housing fixedly connected to the transmission pipe, a sealing block fixedly connected inside the housing, a valve cap below the sealing block, a spring fixedly connected below the valve cap, the other end of the spring fixedly connected to the inner wall of the housing, a guide post inside the spring, the guide post passing through the spring and fixedly connected to the valve cap, and the end of the housing away from the transmission pipe connected to the nozzle.

[0010] The device has two nozzles, which are symmetrically distributed along the central axis of the connecting arm. Each nozzle has multiple sets of evenly distributed nozzles.

[0011] The mounting base and the rotary motor are symmetrically arranged in twos, and the output end of each rotary motor is fixedly connected to the stirring head.

[0012] The anti-reverse mechanism also has two sets that are connected to the nozzle. The two anti-reverse mechanisms have the same structure and work independently.

[0013] The end of the transmission pipe furthest from the nozzle extends out to the top of the connecting arm, and the transmission pipe can be connected to the liquid storage equipment of the medicine storage tank.

[0014] The rotating motor is equipped with a shock-absorbing pad between itself and the mounting base. The shock-absorbing pad is made of nitrile rubber.

[0015] The spray direction of the nozzle can be adjusted synchronously with the tilt angle of the stirring head.

[0016] Among them, the rotary motor is an independently speed-adjustable motor, and the rotation directions of the two rotary motors can be set synchronously or in opposite directions.

[0017] This utility model has at least the following beneficial effects:

[0018] When in use, this utility model can achieve stepless adjustment of the stirring head angle by setting an adjustment mechanism, covering special areas such as slopes and corners, and adapting to a variety of usage environments and scenarios, so that the agent can be fully and evenly mixed. By setting a backflow prevention mechanism, it prevents backflow and particle backflow and blockage. The overall combination significantly improves the work efficiency and construction quality, and is suitable for various needs of shallow soil remediation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a partial schematic diagram of the interior of the connecting arm of this utility model;

[0021] Figure 3 This is a partial schematic diagram of the adjustment mechanism of this utility model;

[0022] Figure 4 This is a schematic diagram of the strip rail structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the internal structure of the anti-reverse mechanism of this utility model.

[0024] In the diagram: 1. Connecting arm; 2. Stirring head; 3. Adjusting mechanism; 31. Fixed plate; 32. Annular slide rail; 33. First slider; 34. Mounting base; 35. Rotary motor; 36. Arc groove; 37. Strip slide rail; 38. Second slider; 39. Screw; 310. Drive motor; 311. First rotating rod; 312. Connecting rod; 313. Second rotating rod; 4. Transmission pipe; 5. Nozzle; 6. Anti-reverse mechanism; 61. Outer shell; 62. Sealing block; 63. Valve cap; 64. Spring; 65. Guide post; 7. Nozzle; 8. Shock-absorbing pad. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1

[0027] Please see Figures 1 to 5This utility model provides a technical solution: an in-situ shallow mixing device, comprising: a connecting arm 1, a mixing head 2 located below the connecting arm 1, an adjustment mechanism 3 located inside the connecting arm 1 near the mixing head 2, the adjustment mechanism 3 adjusting the tilt angle of the mixing head 2, a transmission pipe 4 passing through the connecting arm 1, a nozzle 5 located at the end of the transmission pipe 4 near the mixing head 2, and a backflow prevention mechanism 6 between the transmission pipe 4 and the nozzle 5 to prevent the backflow of chemicals or particles into the device. The connecting arm 1 is integrally welded from Q345B low-alloy high-strength steel, capable of withstanding the mixing head 2 and the comprehensive load during operation. The blades of the mixing head 2 are made of tungsten carbide alloy inlaid steel, which can effectively improve the service life under high clay wear conditions and reduce replacement frequency. The adjustment mechanism 3 can drive the mixing head 2 to steplessly adjust the tilt angle within the range of 0°-30°, adapting to the working depth of shallow soil and meeting the mixing needs of special areas such as slopes and corners, solving the problem that the fixed angle of traditional equipment cannot adapt to special areas. The anti-backflow mechanism 6 can prevent the backflow of the medicine from contaminating the storage equipment, and at the same time block clay particles from entering the transmission pipe 4 and the inside of the equipment with the backflow of the medicine, thereby reducing the pipeline blockage rate and reducing downtime for cleaning.

[0028] The adjusting mechanism 3 includes a fixed disk 31 fixedly connected to the inner wall of the connecting arm 1. An annular slide rail 32 is provided on the fixed disk 31. Symmetrically arranged first sliders 33 are slidably connected within the annular slide rail 32. A mounting base 34 is fixedly connected to the first slider 33. A rotary motor 35 is fixedly connected to the mounting base 34. The output end of the rotary motor 35 is fixedly connected to the stirring head 2. An arc-shaped groove 36 is formed within the annular slide rail 32. The mechanism also includes a strip slide rail 37 fixedly connected to the fixed disk 31. A second slider 38 is slidably connected within the strip slide rail 37. A screw 39 is inserted through the second slider 38 and rotatably connected to the strip rail 37. A drive motor 310 is fixedly connected to the end of the screw 39 away from the strip rail 37, and the drive motor 310 is fixedly connected to the fixed plate 31. A first rotating rod 311 is fixedly connected to the side of the first slider 33 away from the mounting base 34. A connecting rod 312 is rotatably connected to the first rotating rod 311, and a second rotating rod 313 is rotatably connected to the other end of the connecting rod 312. The second rotating rod 313 is fixedly connected to both ends of the second slider 38. The fixed plate 31 is made of 45# steel with a chrome-plated surface for rust prevention. The mounting base 34 is made of cast steel. The rotating motor 35 has an IP65 protection rating, allowing it to work in short-term rain conditions and adapting to dusty and rainy environments, reducing motor failure rates. The arc-shaped groove 36 corresponds to the adjustment range of the mixing head 2 and limits the sliding stroke of the first slider 33, preventing damage to components due to over-angle adjustment and improving equipment safety. The second slider 38 is adapted to the size of the strip rail 37. The screw 39 has a trapezoidal thread and is coated with molybdenum disulfide grease to prevent adhesion and wear, and to prevent clay slurry from seeping into the thread gap and causing jamming.

[0029] When the angle of the stirring head 2 needs to be adjusted, the drive motor 310 starts and drives the screw 39 in the strip slide rail 37 to rotate. The screw 39 drives the second slider 38 to slide linearly along the strip slide rail 37 through the thread transmission. When the second slider 38 slides, the second rotating rods 313 at both ends move synchronously. Through the connecting rod 312, the first rotating rod 311 is pulled to move, so that the first slider 33 slides along the track of the annular slide rail 32 on the fixed plate 31. When the first slider 33 slides, the mounting base 34 and the rotary motor 35 fixed on it rotate together along the annular track. Finally, the stirring head 2 connected to the output end of the rotary motor 35 rotates around the center of the annular slide rail 32, realizing the stepless adjustment of the tilt angle of the stirring head 2.

[0030] The check valve mechanism 6 includes a housing 61 fixedly connected to the transmission pipe 4. A sealing block 62 is fixedly connected inside the housing 61. A valve cap 63 is located below the sealing block 62. A spring 64 is fixedly connected below the valve cap 63. The other end of the spring 64 is fixedly connected to the inner wall of the housing 61. A guide post 65 is located inside the spring 64, passing through the spring 64 and fixedly connected to the valve cap 63. The end of the housing 61 furthest from the transmission pipe 4 is connected to the nozzle 5. The housing 61 is made of 304 stainless steel, the sealing block 62 is made of polytetrafluoroethylene (PTFE) with a tapered sealing surface, the valve cap 63 is made of alumina ceramic, its top fitting the sealing block 62, and its surface coated with a PTFE anti-stick coating. The spring 64 is made of 304 stainless steel, its elasticity adapting to the working pressure of the agent in the transmission pipe 4. The guide post 65 limits the radial offset of the valve cap 63, controlling the sealing surface fit deviation and ensuring the check valve mechanism 6 can still operate stably after long-term operation. In use, when the agent is conveyed through the transmission pipe 4, the agent pressure acts on the bottom of the valve cap 63, overcoming the elastic force of the spring 64 and pushing the valve cap 63 downward, causing the valve cap 63 to separate from the sealing block 62, forming a flow channel. The agent flows through this channel through the outer shell 61 to the nozzle 5, completing the agent spraying. When the agent delivery stops, the spring 64 returns to its original position, pushing the valve cap 63 upward. The guide post 65 restricts the radial offset of the valve cap 63, ensuring that the conical surface at the top of the valve cap 63 precisely fits with the conical sealing surface of the sealing block 62, forming a seal and preventing the agent and particles from flowing back into the transmission pipe 4, thus achieving the backflow prevention function.

[0031] There are two nozzles 5, and the two nozzles 5 are symmetrically distributed along the central axis of the connecting arm 1. The nozzles 5 are provided with multiple sets of evenly distributed nozzles 7. The design of the double nozzles 5 can cover the mixing range of the mixing heads 2 on both sides, so as to make the mixing more uniform. The multiple sets of evenly distributed nozzles 7 can spray the agent from multiple directions, penetrate the soil in all directions and mix thoroughly.

[0032] Two mounting bases 34 and two rotary motors 35 are symmetrically arranged, with each rotary motor 35's output terminal independently connected to a stirring head 2. The rotary motors 35 are independently speed-adjustable, and the rotation directions of the two rotary motors 35 can be set synchronously or in opposite directions. This design facilitates maintenance of the stirring head 2 and allows for normal operation of the other shaft in case of a failure, improving the equipment's fault tolerance. The synchronous or reverse rotation design of the rotary motors 35 allows for cross-shearing force when rotating in opposite directions, which can improve the clay clump breaking rate and solve the problem of incomplete clay clump breaking. When rotating synchronously, the mixing range diameter expands, effectively improving work efficiency for large-area shallow soil remediation.

[0033] The anti-reverse mechanism 6 is also provided with two sets that are connected to the nozzle 5 respectively. The two anti-reverse mechanisms 6 have the same structure and work independently. The anti-reverse mechanism 6 is connected to the two nozzles 5 one-to-one to ensure that the agent supply of each nozzle 5 is independent and stable, and to avoid uneven agent supply and mixing uniformity deviation caused by the failure of a single anti-reverse mechanism.

[0034] The end of the transmission pipe 4 away from the nozzle 5 extends out to the top of the connecting arm 1. The transmission pipe 4 can be connected to liquid storage equipment such as medicine storage tanks. A quick connector can be added to the extended end to enable quick connection with liquid storage equipment such as medicine storage tanks and vehicle-mounted infusion pumps. At the same time, one device can connect to multiple types of storage equipment without replacing the transmission pipe 4, thus expanding the applicable scenarios of the device from fixed sites to mobile repair operations.

[0035] A shock-absorbing pad 8 is provided between the rotary motor 35 and the mounting base 34. The shock-absorbing pad 8 is made of nitrile rubber and its size matches the motor mounting surface. It is fixed by bolts and can absorb the vibration energy generated when the rotary motor 35 is working, reduce the transmission of vibration to the mounting base 34 and the connecting arm 1, reduce the overall operating noise of the equipment, and at the same time avoid the loosening of motor bolts and fatigue damage to the mounting base 34 caused by long-term vibration, thus extending the service life of the connection structure between the rotary motor 35 and the mounting base 34.

[0036] The spray pressure range of nozzle 5 is 0.5-5MPa, and the spray direction of nozzle 7 can be adjusted synchronously with the tilt angle of mixing head 2. This pressure range can adapt to the agent injection requirements of different permeable soils such as sand and clay, ensuring that the agent can effectively penetrate into the mixing area. The synchronous adjustment of nozzle 7 with the tilt angle of mixing head 2 can ensure that the agent spray range always accurately coincides with the mixing trajectory of mixing head 2, avoiding waste caused by agent spraying deviating from the mixing area, and ensuring the uniformity of mixing of agent and broken soil.

[0037] The outer shell 61 of the check valve mechanism 6 is made of 304 stainless steel, and the sealing surfaces of the valve cap 63 and the sealing block 62 are mirror polished. The 304 stainless steel outer shell 61 can withstand neutral and weakly corrosive agents, improving the corrosion resistance of the check valve mechanism 6 in the soil remediation agent environment. The mirror polished sealing surface can reduce the residue and adhesion of agents and clay particles on the sealing surface, so that the gap between the valve cap 63 and the sealing block 62 is ≤0.01mm, ensuring the backflow blocking rate in the non-jet state and further reducing the risk of blockage in the transmission pipe.

[0038] When the entire equipment is in use, it is mounted on construction machinery such as excavators via the connecting arm 1. Before operation, according to the treatment requirements of shallow soil, the angle of the mixing head 2 is adjusted by the adjustment mechanism 3 to adapt to special areas such as slopes and corners. During operation, the rotary motor 35 drives the mixing head 2 to rotate and break up the soil. At the same time, the transmission pipe 4 delivers the agent from the storage device to the nozzle 5. During the delivery process, the anti-reverse mechanism 6 works automatically. When the delivery stops, the spring 64 pushes the valve cap 63 to fit and seal the sealing block 62, preventing the backflow of the agent and clay particles and avoiding pipeline blockage. The whole system works together to achieve in-situ remediation of shallow soil and is effectively applicable to a variety of application scenarios and environments.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An in-situ shallow layer agitation apparatus comprising: The utility model relates to a connecting arm, characterized in that: a stirring head is arranged below the connecting arm, an adjusting mechanism is arranged inside the side of the connecting arm close to the stirring head, the adjusting mechanism adjusts the inclination angle of the stirring head, a transmission pipe is arranged in the connecting arm, a nozzle is arranged at the end of the transmission pipe close to the stirring head, a non-return mechanism is arranged between the transmission pipe and the nozzle, and the non-return mechanism prevents the backflow of the medicament or particles into the equipment.

2. An in-situ shallow agitation apparatus as claimed in claim 1, characterised in that: The adjusting mechanism comprises a fixed disc fixedly connected with the inner wall of the connecting arm, an annular slide rail is arranged on the fixed disc, symmetrically arranged first sliding blocks are slidably connected in the annular slide rail, mounting seats are fixedly connected to the first sliding blocks, a rotary motor is fixedly connected to the mounting seats, the output end of the rotary motor is fixedly connected with the stirring head, and an arc-shaped groove is formed in the annular slide rail. Further comprising: a strip-shaped slide rail fixedly connected with the fixed disc, a second sliding block slidably connected in the strip-shaped slide rail, a screw rod arranged in the strip-shaped slide rail, the screw rod penetrating through the second sliding block and being rotatably connected with the strip-shaped slide rail, a driving motor fixedly connected to the end of the screw rod away from the strip-shaped slide rail, and the driving motor fixedly connected with the fixed disc. A first rotary rod is fixedly connected to the side of the first sliding block away from the mounting seat, a connecting rod is rotatably connected to the first rotary rod, a second rotary rod is rotatably connected to the other end of the connecting rod, and the second rotary rod is fixedly connected to the two ends of the second sliding block.

3. The in-situ shallow agitation apparatus of claim 1, wherein: The non-return mechanism comprises an outer shell fixedly connected with the transmission pipe, a sealing block fixedly connected in the outer shell, a valve cap arranged below the sealing block, a spring fixedly connected below the valve cap, the other end of the spring fixedly connected with the inner wall of the outer shell, a guide column arranged in the spring, the guide column penetrating through the spring and fixedly connected with the valve cap, and the end of the outer shell away from the transmission pipe in communication with the nozzle.

4. The in-situ shallow agitation apparatus of claim 1, wherein: The nozzle is provided with two nozzles, and the two nozzles are symmetrically distributed along the central axis of the connecting arm.

5. The in-situ shallow agitation apparatus of claim 2, wherein: The mounting seat and the rotary motor are symmetrically provided with two mounting seats and two rotary motors, and the output end of each rotary motor is fixedly connected with the stirring head.

6. The in-situ shallow agitation apparatus of claim 1, wherein: The non-return mechanism is also provided with two groups of nozzles in communication with the nozzles, and the two non-return mechanisms have the same structure and work independently.

7. The in-situ shallow agitation apparatus of claim 1, wherein: The end of the transmission pipe away from the nozzle extends out of the top of the connecting arm, and the transmission pipe can be in communication with the liquid storage device of the medicament storage tank.

8. The in-situ shallow agitation apparatus of claim 5, wherein: A damping pad is arranged between the rotary motor and the mounting seat.

9. The in-situ shallow agitation apparatus of claim 4, wherein: The spray direction of the nozzle can be adjusted synchronously with the inclination angle of the stirring head.

10. The in-situ shallow agitation apparatus of claim 5, wherein: The rotary motor is an independently adjustable speed motor, and the rotation directions of the two rotary motors can be set synchronously or reversely.

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