Injection type covering device for soil heavy metal remediation

Abstract

The embodiment of the utility model discloses an injection type covering device for soil heavy metal remediation, which comprises a bottom plate, a medicament storage bin and a soil storage bin are respectively mounted above the bottom plate, an injection mechanism is mounted at the bottom of the medicament storage bin, a connecting rod is mounted on the outer surface of the injection mechanism, and a soil storage bin is mounted on the soil storage bin. A supporting rod penetrates through the interior of the end, close to the injection mechanism, of the connecting rod, a discharging mechanism is installed at the bottom of the soil storage bin and comprises a discharging pipe and a spiral shaft, the discharging mechanism synchronously conveys dried soil while a remediation agent is injected into the injection pipe, the agent injection link and the covering link are combined into one procedure, and therefore the remediation efficiency is improved. The operation procedures are combined, time cost is saved, the agent exposure time is effectively shortened, the soil flowing direction is accurately controlled through the distribution disc and the protruding strips, it is guaranteed that the soil comprehensively and evenly covers the surface of an injection area, the risks of agent exposure, volatilization and the like are reduced, and the remediation effect stability is improved.

Description

Technical Field

[0001] This utility model relates to the field of soil remediation technology, specifically to an injection-type covering device for soil heavy metal remediation. Background Technology

[0002] Currently, because heavy metals cannot be decomposed by soil microorganisms, they affect the activity and community structure of soil microorganisms, inhibit the activity of enzymes in the soil, and thus affect the soil's nutrient cycling and material transformation processes. Furthermore, heavy metals in the soil can enter the human body through the food chain, accumulate in the body, and cause damage to the nervous system, immune system, reproductive system, etc. For soil contaminated with heavy metals, most treatments use injection-type remediation devices. The agent is injected into the soil, and it can react chemically with the heavy metals in the soil to form stable compounds, reducing the toxicity and mobility of heavy metals, and converting heavy metals into low-toxicity or non-toxic forms.

[0003] Currently, most remediation agents are liquid. Compared to solid remediation, liquid remediation agents have stronger permeability and can penetrate deeper into the soil layer, covering a larger area. At the same time, liquid agents can also penetrate to the surface layer, which is the main area for microbial activity. Remediation agents such as strong acid leaching agents or heavy metal chelating agents may directly inhibit or kill beneficial microorganisms when they penetrate to the surface layer, especially when the soil moisture is high, as liquid agents are more likely to spread.

[0004] Current solutions involve covering the surface with a layer of dried soil. While the infiltration rate may slow down under arid conditions, in practice, we have found that injecting the agent and covering the soil cannot be done simultaneously and must be done in two separate steps, which increases time costs. If the soil covering is not done in time, the agent may still volatilize and run off, especially in highly permeable sites where the agent will quickly penetrate to the surface and volatilize and run off. This not only affects the remediation effect but may also cause secondary pollution to the surrounding environment. Utility Model Content

[0005] Therefore, this utility model provides a solution to the problems in the prior art where injecting the agent and covering the soil cannot be carried out simultaneously, the loss and volatilization of the agent affect the restoration effect, and pollute the surrounding environment.

[0006] To achieve the above objectives, the embodiments of this utility model provide the following technical solutions:

[0007] An injection-type covering device for heavy metal remediation of soil includes a base plate, an agent storage chamber and a soil storage chamber installed on the top of the base plate, an injection mechanism installed at the bottom of the agent storage chamber, a mixing chamber located below the agent storage chamber, and a discharge mechanism for conveying soil installed at the bottom of the soil storage chamber, with the discharge port of the discharge mechanism located at the top of the mixing chamber.

[0008] The discharge mechanism includes a discharge pipe and a spiral shaft installed inside the discharge pipe. One end of the spiral shaft is equipped with the output shaft of a geared motor. The spiral shaft is used to transport soil to the mixing silo. The injection mechanism is used to inject remediation drugs into the soil transported to the mixing silo.

[0009] Furthermore, a distribution plate is installed inside the mixing hopper, and four raised ridges are provided on the surface of the distribution plate. The discharge port of the discharge pipe is located directly above the distribution plate.

[0010] Furthermore, the upper surface of the material distribution plate is designed as a downwardly sloping structure, and a discharge port is formed between the edge of the material distribution plate and the mixing bin.

[0011] Furthermore, the injection mechanism includes an outer sleeve, an inner sleeve slidably connected inside the outer sleeve, and multiple injection tubes inserted into the bottom of the inner sleeve. The inner sleeve is provided with a piston plate and a push rod, and the piston plate and the inner sleeve form a sliding structure through the push rod.

[0012] Furthermore, both the outer sleeve and the inner sleeve have holes on their surfaces, and when the inner sleeve slides upward, the holes in the outer sleeve and the inner sleeve overlap each other.

[0013] The embodiments of this utility model have the following advantages:

[0014] This invention combines the injection of the remediation agent into a single process by simultaneously conveying dried soil through the discharge mechanism. This streamlined workflow saves time and costs, effectively shortens the agent exposure time, and ensures that the soil is fully and evenly covered on the injection area surface by precise control of the soil flow direction using the distribution plate and raised strips. This reduces the risks of agent exposure and volatilization, and improves the stability of the remediation effect. Attached Figure Description

[0015] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0016] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0017] Figure 1 This is a schematic diagram of the overall structure in the embodiment of this utility model;

[0018] Figure 2 This is a schematic cross-sectional view of the embodiment of this utility model;

[0019] Figure 3 This is a schematic diagram of the injection mechanism and the discharge mechanism in the embodiment of this utility model;

[0020] Figure 4 This is a schematic diagram of the exploded structure of the injection mechanism in an embodiment of this utility model;

[0021] Figure 5 This is a cross-sectional view of the injection mechanism in an embodiment of the present invention.

[0022] In the picture:

[0023] 1-Base plate; 2-Reagent storage chamber; 3-Soil storage chamber; 4-Injection mechanism; 5-Connecting rod; 6-Support rod; 7-Discharge mechanism;

[0024] 401 - Outer sleeve; 402 - Inner sleeve; 403 - Injection tube; 404 - Piston plate; 405 - Push rod;

[0025] 701-Discharge pipe; 702-Screw shaft; 703-Gear motor; 704-First bevel gear; 705-Second bevel gear; 706-Rotor; 707-Distribution disc; 708-Protruding strip. Detailed Implementation

[0026] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] Please see Figures 1 to 5This utility model provides an injection-type covering device for soil heavy metal remediation, including a base plate 1, an agent storage chamber 2 and a soil storage chamber 3 respectively installed on the top of the base plate 1, an injection mechanism 4 installed at the bottom of the agent storage chamber 2, a connecting rod 5 installed on the outer surface of the injection mechanism 4, a support rod 6 passing through the inside of the connecting rod 5 near the injection mechanism 4, and a discharge mechanism 7 installed at the bottom of the soil storage chamber 3.

[0028] The discharge mechanism 7 includes a discharge pipe 701 and a screw shaft 702. One end of the screw shaft 702 is equipped with the output shaft of a geared motor 703, and the other end of the screw shaft 702 is welded with a first bevel gear 704. A second bevel gear 705 meshes with the lower part of the first bevel gear 704. A rotating rod 706 and a material distribution plate 707 are installed on the lower surface of the second bevel gear 705. Four raised ribs 708 are provided on the surface of the material distribution plate 707.

[0029] In practical use:

[0030] First, by starting the reduction motor 703, the screw shaft 702 begins to rotate, pushing the soil storage bin 3 through the discharge pipe 701 to the distribution plate 707. Through the meshing transmission of the first bevel gear 704 and the second bevel gear 705, the distribution plate 707 begins to rotate, and the dried soil particles are scattered in all directions under the action of centrifugal force. The inclined structure on the upper surface of the distribution plate 707 prevents the material from accumulating in the center or at the edge. The four protruding strips 708 guide the flow direction of the soil, increase disturbance, and prevent the material from agglomerating. The connecting rod 5 swings along the support rod 6, and using the lever principle, the bottom of the injection mechanism 4 is embedded in the soil layer to begin injecting the repair agent. As the agent is injected, the soil is simultaneously and evenly covered on the surface. Finally, the injection mechanism 4 is pulled out, and the connecting rod 5 is pulled to move the entire equipment to the next working point. During this process, the discharge mechanism 7 remains in working condition to ensure that the soil continues to fall.

[0031] like Figure 3 and Figure 4 As shown, the injection mechanism 4 includes an outer tube 401, an inner tube 402 slidably connected inside the outer tube 401, and six injection tubes 403 inserted into the bottom of the inner tube 402. The inner tube 402 is equipped with a piston plate 404 and a push rod 405. The piston plate 404 and the inner tube 402 form a sliding structure through the push rod 405. When the injection tubes 403 are inserted into the soil layer, the push rod 405 is pushed. The push rod 405 pushes the piston plate 404 to slide downward along the inner tube 402, pushing the internal agent into the six injection tubes 403 and into the soil layer. The lower end of the injection tubes 403 is serrated, which makes insertion easier.

[0032] like Figure 1 and Figure 2As shown, the central axes of the second bevel gear 705, the rotating rod 706, and the distribution plate 707 coincide. The rotating rod 706 and the discharge pipe 701 are connected by a rotating method. The upper surface of the distribution plate 707 is set as an inclined structure. Through the meshing of the first bevel gear 704, the second bevel gear 705, the rotating rod 706, and the distribution plate 707 are driven to rotate synchronously. The inclined structure of the upper surface of the distribution plate 707 prevents the material from accumulating in the center or at the edge.

[0033] like Figure 3 As shown, one end of the connecting rod 5 is provided with a slotted mounting position, and the inner sleeve 402 is installed on the mounting position. Sliding grooves are provided on the front and back of the mounting position, and the outer wall of the inner sleeve 402 is provided with a protrusion that penetrates the sliding groove. The inner sleeve 402 penetrates the slotted mounting position and is locked in the sliding groove by the protrusion. When the connecting rod 5 swings, it drives the protrusion and the inner sleeve 402 to slide up and down along the outer sleeve 401. During the sliding of the protrusion, the sliding groove plays a role in making way.

[0034] like Figure 4 and Figure 5 As shown, both the outer sleeve 401 and the inner sleeve 402 have holes on their surfaces. When the inner sleeve 402 slides upward, the holes in the outer sleeve 401 and the inner sleeve 402 overlap. The outer sleeve 401 is welded to the bottom of the drug storage chamber 2, and the holes in the outer sleeve 401 are located inside the drug storage chamber 2. When the inner sleeve 402 slides upward and the holes overlap, the piston plate 404 is pulled upward, creating a negative pressure inside, which adsorbs the drug into the inner sleeve 402. When the connecting rod 5 pushes the inner sleeve 402 downward, the holes in the inner sleeve 402 move downward simultaneously. At this time, the inner sleeve 402 covers the holes in the outer sleeve 401 to prevent the material from continuously seeping in. The outer sleeve 401 covers the holes in the inner sleeve 402, and during the process of the piston plate 404 being pushed down, it is ensured that the drug flows out from each injection tube 403.

[0035] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. An injection type covering device for remediation of heavy metals in soil, characterized by, Includes a base plate (1), above which are installed a drug storage chamber (2) and a soil storage chamber (3), an injection mechanism (4) is installed at the bottom of the drug storage chamber (2), a mixing chamber is provided below the drug storage chamber (2), and a discharge mechanism (7) for conveying soil is installed at the bottom of the soil storage chamber (3), with the discharge port of the discharge mechanism (7) located at the top of the mixing chamber; The discharge mechanism (7) includes a discharge pipe (701) and a spiral shaft (702) installed in the discharge pipe. One end of the spiral shaft (702) is equipped with the output shaft of a geared motor (703). The spiral shaft (702) is used to transport soil to the mixing silo. The injection mechanism (4) is used to inject remediation drugs into the soil transported to the mixing silo.

2. The injection-type covering device for soil heavy metal remediation according to claim 1, characterized in that, The mixing hopper is equipped with a distribution plate (707), and four raised strips (708) are provided on the surface of the distribution plate (707). The discharge port of the discharge pipe (701) is located directly above the distribution plate (707).

3. The injection-type covering device for soil heavy metal remediation according to claim 2, characterized in that, The upper surface of the material distribution plate (707) is designed as a downward sloping structure, and a discharge port is formed between the edge of the material distribution plate (707) and the mixing bin.

4. The injection-type covering device for soil heavy metal remediation according to claim 1, characterized in that, The injection mechanism (4) includes an outer tube (401), an inner tube (402) is slidably connected inside the outer tube (401), and multiple injection tubes (403) are inserted into the bottom of the inner tube (402). The inner tube (402) is provided with a piston plate (404) and a push rod (405). The piston plate (404) and the inner tube (402) form a sliding structure through the push rod (405).

5. The injection type covering device for soil heavy metal remediation according to claim 4, characterized in that, Both the outer sleeve (401) and the inner sleeve (402) have holes on their surfaces. When the inner sleeve (402) slides to the top, the holes in the outer sleeve (401) and the inner sleeve (402) overlap.

Images