Multi-section type pressure-controlled medicine injection mechanism

Abstract

The utility model belongs to the technical field of soil groundwater remediation, and particularly relates to a multi-section type pressure-controlled chemical injection mechanism which comprises a multi-section type injection well pipe, the multi-section type injection well pipe is connected with an injection well screen pipe section and an injection well sealing section in a sectioned mode, and the injection well sealing section and the injection well screen pipe section are arranged in a staggered mode. A plurality of medicament injection pipes are assembled and connected in the multi-section injection well pipe, the lower ends of the medicament injection pipes are located at different injection well screen pipe sections, a sleeve is assembled and connected outside the multi-section injection well pipe, the sleeve is communicated with the outside, and a lifting mechanism is fixedly assembled and connected to the upper end of the multi-section injection well pipe; according to the medicine injection device, medicine injection is conducted in a segmented mode, repeated pressure debugging can be avoided, and injection can be conducted at the same time after the pressure of each segment is determined in the injection process.

Description

Technical Field

[0001] This utility model belongs to the field of soil and groundwater remediation technology, specifically relating to a multi-stage pressure-controlled injection mechanism. Background Technology

[0002] In-situ injection technology is a method that uses injection equipment to inject chemicals into the ground. Through the physicochemical interaction between the chemical agents and pollutants, the mobility of pollutants is reduced, and the toxicity of pollutants is reduced or rendered non-toxic. However, commonly used injection technologies usually involve continuous injection of chemicals at a single point at a specific depth. The entire injection well is interconnected, and the injection pressure needs to be adjusted in real time. During the injection process, problems such as difficulty in controlling the injection pressure, chemical overflow, and long injection time are often encountered.

[0003] However, in existing technologies, in order to facilitate pressure control, the screen tube section is shortened so that the agent can be diffused more concentratedly into the remediation area. But at the same time, this results in only a small area being able to be remediated, leaving some soil depths unremediated. Utility Model Content

[0004] In view of the problems mentioned in the background art, the purpose of this utility model is to provide a multi-stage pressure-controlled drug injection mechanism to solve the problems mentioned in the background art.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0006] A multi-segment controlled pressure injection mechanism includes a multi-segment injection well casing, which is segmented and connected to an injection well screen section and an injection well sealing section. The injection well sealing section and the injection well screen section are arranged alternately. Multiple drug injection pipes are assembled and connected inside the multi-segment injection well casing, with the lower ends of the multiple drug injection pipes located in different injection well screen sections. A casing is assembled and connected to the outside of the multi-segment injection well casing, and the casing communicates with the outside. A lifting mechanism is fixedly assembled and connected to the upper end of the multi-segment injection well casing.

[0007] Furthermore, the lower end of the multi-segment injection well pipe is provided with a bottom plug.

[0008] Further specifying, the lifting mechanism includes a sleeve fixedly connected to the upper end of the multi-segment injection well pipe, the sleeve being integrally formed and connected to a connecting platform, and multiple hydraulic cylinders being assembled and connected to the lower side of the connecting platform, the hydraulic cylinders being located on the ground surface.

[0009] Further specifying, the upper end of the multi-segment injection well pipe is equipped with an injection well cover, and the injection well cover has a connection hole for the drug injection pipe.

[0010] Further specifying, the injection well sealing section includes two sealing columns, with a hollow space between the two sealing columns.

[0011] Further specifying, the injection well screen pipe section is equipped with a pressure sensing system, the pressure sensing system is connected to a chemical injection device, and the chemical injection pipe is connected to a chemical tank.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] This invention uses segmented injection of the drug, which avoids repeated pressure adjustments. The pressure of each segment can be determined during the injection process, and the drugs can be injected simultaneously. At the same time, multi-segment simultaneous injection can greatly accelerate the injection speed and effectively prevent drug overflow.

[0014] This invention can effectively avoid excessive dosage of reagents. The depth of underground pollution changes with depth, and the concentration of reagents can be adjusted according to the depth of pollution through layered injection.

[0015] This utility model is ingeniously designed. By setting a casing outside the multi-segment injection well pipe, the multi-segment injection well pipe can move relative to the soil layer. The lifting mechanism realizes the lifting and lowering of the multi-segment injection well pipe, so that the end position of the drug injection pipe can move relative to the soil layer. Attached Figure Description

[0016] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0017] Figure 1 This is a schematic diagram of the structure of a multi-stage pressure-controlled drug injection mechanism according to the present invention;

[0018] Figure 2 This is a schematic diagram of the multi-segment injection well casing structure of this utility model;

[0019] Figure 3 This is a cross-sectional view of the internal structure of the multi-segment injection well casing of this utility model;

[0020] Figure 4 This is a schematic diagram of the underground assembly of this utility model;

[0021] Figure 5 This is a schematic diagram of the lifting mechanism component structure of this utility model;

[0022] The symbols for the main components are explained below:

[0023] 1. Multi-section injection well casing; 2. Injection well screen section; 3. Injection well sealing section; 4. Sealing column; 5. Chemical injection pipe;

[0024] 6. Lifting mechanism, 61. Sleeve, 62. Connecting platform, 63. Hydraulic cylinder, 7. Plug, 8. Injection well cover. Detailed Implementation

[0025] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. 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.

[0026] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains; the terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that an element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0027] like Figure 1-5 As shown, a multi-segment controlled pressure injection mechanism includes a multi-segment injection well pipe 1, which is segmented and connected to an injection well screen pipe segment 2 and an injection well sealing segment 3. The injection well sealing segment 3 and the injection well screen pipe segment 2 are arranged alternately. Multiple drug injection pipes 4 are assembled and connected inside the multi-segment injection well pipe 1. The lower ends of the multiple drug injection pipes 4 are located in different injection well screen pipe segments 2. A casing 5 is assembled and connected to the outside of the multi-segment injection well pipe 1. The casing 5 communicates with the outside. A lifting mechanism 6 is fixedly assembled and connected to the upper end of the multi-segment injection well pipe 1.

[0028] In this embodiment, the injection well screen section 2 is used to allow the agent to reach the repaired location in the soil. The injection well sealing section 3 is used to reduce the length of the injection well screen section 2, making it easier to adjust the pressure of the injection well screen section 2 and facilitate the injection of the agent. The sleeve 5 is used to isolate the multi-segment injection well pipe 1 from the soil, so that the lifting mechanism 6 can lift and lower the multi-segment injection well pipe 1. When the length of the injection well screen section 2 is small, the pressure inside the injection well screen section 2 is easier to adjust. At the same time, by lifting and lowering the multi-segment injection well pipe 1 through the lifting mechanism 6, the position of the agent injection pipe 4 of the multi-segment injection well pipe 1 relative to the soil layer is changed, and the soil areas that the agent has not reached are repaired. The sleeve 5 is fixedly connected to the soil, and at the same time, the sleeve 5 has the ability to pass between the injection well screen section 2 and the soil, so that the agent of the injection well screen pipe 2 can reach the soil layer through the sleeve 5.

[0029] Reference Figure 4 The lower end of the multi-segment injection well casing 1 is provided with a bottom plug 7. In this embodiment, the bottom plug 7 is used to seal the lower part of the multi-segment injection well casing 1.

[0030] Reference Figure 5 The lifting mechanism 6 includes a sleeve 61 fixedly connected to the upper end of the multi-segment injection well pipe 1. A connecting platform 62 is integrally formed on the sleeve 61, and multiple hydraulic cylinders 63 are mounted and connected to the lower side of the connecting platform 62. The hydraulic cylinders 63 are located on the upper side of the ground. In this embodiment, the sleeve 61 is used to fixally connect to the upper part of the multi-segment injection well pipe 1, and the connecting platform 62 is fixedly connected to the sleeve 61 to mount the hydraulic cylinders 63. The hydraulic cylinders 63 are located on the upper side of the ground. When the output end of the hydraulic cylinder 63 moves upward, it drives the multi-segment injection well pipe 1 to move upward relative to the soil layer.

[0031] Reference Figure 4 The upper end of the multi-segment injection well pipe 1 is fitted with an injection well cover 8, and the injection well cover 8 has a connection hole for the drug injection pipe 4. In this embodiment, the injection well cover 8 is used to seal the upper end of the multi-segment injection well pipe 1, and the upper end of the drug injection pipe 4 passes through the injection well cover 8.

[0032] Reference Figure 3 The injection well sealing section 3 includes two sealing columns 31, with a hollow space between them. In this embodiment, the sealing columns 31 are used to seal the multi-section injection well casing 1 in sections, preventing the agent located in the injection well screen section 2 from entering the sealing section 31. The gap between the two sealing columns 31 is used to reduce the weight of the multi-section injection well casing 1.

[0033] The injection well screen section 2 is equipped with a pressure sensing system, which is connected to the chemical injection equipment, the chemical injection pipe 4, and the chemical tank. In this embodiment, the pressure sensing system is used to sense the pressure of the injection well screen section 2, and thereby control the feeding of the chemical injection pipe 4 according to the sensed pressure. This allows the chemical injection pipe 4 to perform multi-stage simultaneous injection, which can greatly accelerate the injection speed of the chemical and effectively prevent chemical overflow.

[0034] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0035] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A multi-stage pressure-controlled injection mechanism, comprising a multi-stage injection well pipe (1), characterized in that: The multi-section injection well pipe (1) is connected with injection well screen pipe sections (2) and injection well sealing sections (3), the injection well sealing sections (3) and the injection well screen pipe sections (2) are staggered, a plurality of medicament injection pipes (4) are assembled and connected in the multi-section injection well pipe (1), the lower ends of the plurality of medicament injection pipes (4) are located in different injection well screen pipe sections (2), a sleeve (5) is assembled and connected outside the multi-section injection well pipe (1), the sleeve (5) is in communication with the outside, and a lifting mechanism (6) is fixedly assembled and connected to the upper end of the multi-section injection well pipe (1).

2. The multi-segmented pressure-controlled medicine injection mechanism of claim 1, wherein: The lower end of the multi-section injection well pipe (1) is provided with a well pipe bottom blocking pipe (7).

3. The multi-segmented pressure-controlled medicine injection mechanism of claim 1, wherein: The lifting mechanism (6) comprises a sleeve (61) fixedly connected to the upper end of the multi-section injection well pipe (1), the sleeve (61) is integrally connected with a connecting table (62), a plurality of hydraulic cylinders (63) are assembled and connected to the lower side of the connecting table (62), and the hydraulic cylinders (63) are located on the upper side of the ground.

4. The multi-segmented pressure-controlled medicine injection mechanism of claim 3, wherein: The upper end of the multi-section injection well pipe (1) is assembled and connected with an injection well well lid (8), and the injection well well lid (8) is provided with a connecting hole of the medicament injection pipe (4).

5. The multi-segmented pressure-controlled medicine injection mechanism of claim 4, wherein: The injection well sealing section (3) comprises two sealing columns (31), and the two sealing columns (31) are hollow.

6. The multi-segmented pressure-controlled medicine injection mechanism according to any one of claims 1-5, characterized in that: The injection well screen pipe section (2) is assembled and connected with a pressure sensing system, the pressure sensing system is connected with a medicament injection device, and the medicament injection pipe (4) is connected with a medicament tank.

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