A reverse circulation gas-liquid mixing device

Abstract

The utility model relates to the technical field of gas lift reverse circulation device, concretely is a kind of reverse circulation gas-liquid mixing device, including the high-pressure air pipe connected with external air compressor and the pumping pipe connected with underground position to be cleaned, the outer wall position of pumping pipe is respectively provided with upper air pipe and lower air pipe from top to bottom, and annular air extraction flow channel and annular gas injection flow channel are formed between upper air pipe and pumping pipe respectively, high-pressure air pipe is connected with tee joint, tee joint is also connected with two conveying air pipes, and two conveying air pipes are communicated with upper air pipe and annular gas injection flow channel respectively, to generate two high-pressure wind jet flows in opposite directions to blow up and extract underground mixture to be cleaned respectively. By the downward jet flow disturbance sediment of lower air pipe through gas injection port, the mixture is formed by the negative pressure suction of upper air pipe through the oblique air extraction port, and the bidirectional jet flow constitutes dynamic circulation structure, and stirring and suction are completed synchronously, to solve the problem of sediment compaction, suction interruption and blockage caused by single airflow of traditional single-pipe one-way gas lift.

Description

Technical Field

[0001] This utility model mainly relates to the technical field of gas lift reverse circulation devices, specifically a reverse circulation gas-liquid mixing device. Background Technology

[0002] Currently, with the acceleration of urbanization and people's pursuit of efficient transportation, urban rail transit is entering a peak construction period, making the construction of deep foundation pits, especially ultra-deep foundation pits, increasingly difficult. For safety reasons, most station main foundation pits use diaphragm walls for support and wells to control groundwater. The trench cleaning process during ultra-deep diaphragm wall construction is often time-consuming and difficult to control in terms of quality. During well dewatering, debris, fine sand, and silt often enter the wells, causing them to gradually become shallower. This makes cleaning the bottom areas difficult, requiring the use of air-lift reverse circulation devices. Previous reverse circulation cleaning devices either directly insert high-pressure air pipes into the conduit to a certain depth, or, although the air pipes are externally connected, only one direction of the air flow is connected to the conduit, resulting in low reverse circulation cleaning efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a reverse circulation gas-liquid mixing device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a reverse circulation gas-liquid mixing device, comprising a high-pressure air duct connected to an external air compressor and an extraction pipe connected to an underground location to be cleaned. The outer wall of the extraction pipe is provided with an upper air duct and a lower air duct from top to bottom. The upper and lower air ducts and the extraction pipe respectively form an annular extraction air channel and an annular injection air channel. The high-pressure air duct is connected to a T-joint, and the T-joint is also connected to two conveying air ducts. The two conveying air ducts are respectively connected to the upper and annular injection air channels, thereby generating two high-pressure air jets in opposite directions to blow up and extract the underground mixture to be cleaned.

[0005] Preferably, an upper connecting air port is formed at the top of the upper air duct, one of the conveying air ducts is connected to the upper connecting air port, and an air extraction port is formed at the position corresponding to the annular air extraction channel of the extraction pipe, thereby connecting the annular air extraction channel to the high-pressure air duct and the extraction pipe respectively.

[0006] Furthermore, any one of the air extraction ports is an inward-facing oblique opening that is higher than the outward-facing opening, and there are multiple air extraction ports arranged in an array.

[0007] Preferably, a lower connecting air port is formed at the top of the lower duct, one of the conveying air ducts is connected to the lower connecting air port, and an air injection port is formed at the position corresponding to the annular air injection channel of the extraction pipe, thereby connecting the annular air injection channel to the high-pressure air duct and the underground location to be cleaned respectively.

[0008] Preferably, a fixing ring is provided between the outer wall of the two conveying air ducts and the outer wall of the extraction pipe.

[0009] Preferably, an air valve is provided at the connection position of the three-way connector with the conveying air duct.

[0010] Preferably, the top of the pumping pipe is provided with a connector for connecting to an external sludge discharge structure.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This invention provides a reverse circulation gas-liquid mixing device. It utilizes upper and lower air ducts nested within the outer wall of the extraction pipe to form independent annular extraction and injection channels. Combined with a three-way connector to divert high-pressure gas, it achieves a bidirectional synergistic effect. The lower air duct injects high-pressure gas into the area to be cleaned through the injection port, actively impacting and agitating the bottom sediment, ensuring thorough solid-liquid mixing and suspension. Simultaneously, the upper air duct, through the annular extraction channel and extraction port, creates a wide and uniform negative pressure zone within the extraction pipe, efficiently drawing in the suspended mixture. The two opposing jets form a dynamic circulation, avoiding the problems of bottom material compaction or discontinuous extraction caused by unidirectional airflow.

[0013] This invention provides a reverse circulation gas-liquid mixing device. Its inclined array of suction ports, with a higher inner surface and a lower outer surface, utilizes gravity to reduce mixture retention around the suction ports, enhancing self-cleaning capabilities. The annular cavity design ensures uniform negative pressure distribution along the circumference of the extraction pipe, improving suction efficiency and stability. A fixing ring strengthens the overall rigidity of the multi-pipeline system, and independent air valves facilitate separate adjustment of the upper and lower airflow intensities to adapt to different working conditions. Standardized top connectors simplify quick connection with external sludge removal systems. This enables rapid and stable use in deep foundation pit environments.

[0014] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0015] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of the present invention and other related contents, and should not be considered as limitations on the present invention.

[0016] In the accompanying drawings of the instruction manual:

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

[0018] Figure label:

[0019] 1. High-pressure air duct; 101. T-joint; 102. Air valve; 2. Fixing ring; 3. Delivery air duct; 4a. Upper connecting air port; 4b. Lower connecting air port; 5. Connecting piece; 6. Extraction pipe; 7. Air extraction port; 8. Upper air duct; 9. Annular extraction air channel; 10. Annular injection air channel; 11. Lower air duct; 12. Air injection port. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] like Figure 1 As shown, a reverse circulation gas-liquid mixing device includes a high-pressure air duct 1 connected to an external air compressor and an extraction pipe 6 connected to an underground location to be cleaned. The outer wall of the extraction pipe 6 is provided with an upper air duct 8 and a lower air duct 11 from top to bottom. The upper and lower air ducts and the extraction pipe 6 form an annular extraction channel 9 and an annular injection channel 10, respectively. The high-pressure air duct 1 is connected to a T-joint 101, and the T-joint 101 is also connected to two conveying air ducts 3. The two conveying air ducts 3 are respectively connected to the upper and annular injection channels, thereby generating two high-pressure air jets in opposite directions to blow up and extract the underground mixture to be cleaned.

[0023] The upper air duct 8 and the lower air duct 11 are connected to the extraction pipe 6 by threaded joints for detachable connection, which facilitates disassembly and transportation when the cleaning location needs to be changed.

[0024] The top of the upper air duct 8 forms an upper connecting air port 4a, and one of the conveying air ducts 3 is connected to the upper connecting air port 4a. The extraction pipe 6 forms an extraction port 7 at the position corresponding to the annular extraction air channel 9, thereby connecting the annular extraction air channel 9 to the high-pressure air duct 1 and the extraction pipe 6 respectively.

[0025] Each of the aforementioned air extraction ports 7 is an inclined opening with its inward side higher than its outward side. There are multiple air extraction ports 7 arranged in an array. The inclined opening, with its raised inner lip and lower outer lip, blocks the impact of the main mixture, utilizes gravity to self-drain infiltrates, and optimizes the flow field to suppress eddy current entrainment. This triple effect reduces the risk of mixtures entering the annular air extraction channel 9. Any small amount of mixture that enters the annular air extraction channel 9 can be handled during the disassembly and transfer of equipment to the next location, avoiding impact on subsequent use.

[0026] The top of the lower air duct 11 forms a lower connecting air port 4b, and one of the conveying air ducts 3 is connected to the lower connecting air port 4b. The extraction pipe 6 forms an air injection port 12 at the position corresponding to the annular air injection channel 10, thereby connecting the annular air injection channel 10 to the high-pressure air duct 1 and the underground location to be cleaned, respectively.

[0027] A fixing ring 2 is provided between the outer wall of the two conveying air pipes 3 and the outer wall of the extraction pipe 6 to enhance the stability between the pipes.

[0028] The three-way connector 101 is equipped with two air valves 102 at the connection position with the conveying air duct 3. The air valves 102 are used to achieve independent control of the two airflows.

[0029] The top of the extraction pipe 6 is provided with a connector 5 for connecting to an external sludge discharge structure. The connector 5 is a flange.

[0030] The implementation principle of this application embodiment is as follows: When using this product, the device is placed in the location to be cleaned, and then the external air compressor is started. High-pressure gas is diverted through the three-way connector 101, and the lower air pipe 11 injects high-pressure airflow into the location to be cleaned through the air injection port 12, actively impacting and agitating the sediment in the location to be cleaned, so that the solid and liquid are fully mixed and suspended. At the same time, the upper air pipe 8 forms a uniform negative pressure through multiple air extraction ports 7 arranged in an array with the inner side higher than the outer side, efficiently sucking the suspended mixture and drawing it out from the top of the extraction pipe 6 into the external sludge removal structure. The two reverse jets form a dynamic circulation, which avoids material compaction caused by unidirectional downward airflow and prevents airflow interruption caused by unidirectional suction.

[0031] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from its essential characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A reverse circulation gas-liquid mixing device, comprising a high-pressure air duct (1) connected to an external air compressor and an extraction pipe (6) connected to an underground location to be cleaned, characterized in that: The outer wall of the extraction pipe (6) is provided with an upper air pipe (8) and a lower air pipe (11) from top to bottom. The upper and lower air pipes form an annular extraction air channel (9) and an annular injection air channel (10) between the extraction pipe (6) and the extraction pipe (6). The high-pressure air pipe (1) is connected to a three-way connector (101). The three-way connector (101) is also connected to two conveying air pipes (3). The two conveying air pipes (3) are connected to the upper and annular injection air channels respectively, thereby generating two high-pressure air jets in opposite directions to blow up and extract the underground mixture to be cleaned.

2. The reverse circulation gas-liquid mixing device according to claim 1, characterized in that: The top of the upper air duct (8) forms an upper connecting air port (4a), and one of the conveying air ducts (3) is connected to the upper connecting air port (4a). The extraction pipe (6) forms an extraction port (7) at the position corresponding to the annular extraction air channel (9), thereby connecting the annular extraction air channel (9) to the high-pressure air duct (1) and the extraction pipe (6) respectively.

3. The reverse circulation gas-liquid mixing device according to claim 2, characterized in that: Each of the air extraction ports (7) is an inward-facing oblique opening that is higher than the outward-facing opening, and there are multiple air extraction ports (7) arranged in an array.

4. The reverse circulation gas-liquid mixing device according to claim 1, characterized in that: The top of the downpipe (11) forms a lower connecting air port (4b), and one of the conveying air pipes (3) is connected to the lower connecting air port (4b). The extraction pipe (6) forms an air injection port (12) at the position corresponding to the annular air injection channel (10), thereby connecting the annular air injection channel (10) to the high-pressure air pipe (1) and the underground location to be cleaned.

5. The reverse circulation gas-liquid mixing device according to claim 1, characterized in that: A fixing ring (2) is provided between the outer wall of the two conveying air pipes (3) and the outer wall of the extraction pipe (6).

6. The reverse circulation gas-liquid mixing device according to claim 1, characterized in that: An air valve (102) is provided at the connection position of the three-way connector (101) and the conveying air pipe (3).

7. The reverse circulation gas-liquid mixing device according to claim 1, characterized in that: The top of the pumping pipe (6) is provided with a connector (5) for connecting to the external sludge discharge structure.

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