A high-pressure jet flushing device for curtain grouting in muddy strata

Abstract

The utility model discloses a high-pressure jet flushing device for curtain grouting of mud-containing strata, and relates to the technical field of water conservancy and hydropower engineering and housing construction engineering. It comprises a nozzle body and two jet port sealing pieces; the top of the nozzle body is connected to the grouting drill rod through a thread, and a conical part is arranged at the bottom; a connecting hole is arranged in the middle of the jet port sealing piece, and a plurality of jet ports are arranged on the jet port sealing piece. The utility model can more quickly and effectively break up the mud when flushing the mud-containing part in the grouting hole.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy and hydropower engineering and housing construction engineering construction, and more specifically is a high-pressure jet flushing device for curtain grouting of mud-containing strata. Background Art

[0002] Curtain grouting anti-seepage construction is increasingly widely used in national key water conservancy and hydropower projects. The high mud content in the mud layer section easily leads to the formation of a grouting curtain with low shear strength and poor anti-seepage performance, which cannot achieve a good anti-seepage effect. When carrying out anti-seepage treatment in the mud layer section, higher requirements are put forward for the construction process of curtain grouting. Efficient and reliable completion of mud layer flushing and reducing the mud content in the grouting hole are of great significance to improving the shear strength and anti-seepage effect of the grouting curtain.

[0003] Therefore, it is necessary to develop a high-pressure jet flushing device for curtain grouting in mud-containing strata that can effectively shorten the construction period and ensure the mud flushing effect of the grouting holes. Summary of the invention

[0004] The purpose of the utility model is to overcome the shortcomings of the above-mentioned background technology and to provide a high-pressure jet flushing device for curtain grouting in muddy strata, which is convenient to construct, has a stable structure, shortens the construction period, and ensures the flushing efficiency and quality of the curtain grouting holes in muddy strata.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is: a high-pressure jet flushing device for curtain grouting in mud-containing strata, characterized in that it comprises a nozzle body and two jet port sealing pieces symmetrically arranged on the side of the nozzle body; the top of the nozzle body is connected to the grouting drill rod through a thread, and a conical part is arranged at the bottom;

[0006] A connecting hole is arranged in the middle of the injection port sealing piece, and a plurality of injection ports are arranged on the injection port sealing piece; the connecting hole connects the injection port sealing piece with the nozzle body through a screw and a nut.

[0007] In the above technical solution, a groove is provided at the connection between the side surface of the nozzle body and the injection port sealing piece, and the injection port sealing piece is located in the groove.

[0008] In the above technical solution, a plurality of groups of cutting teeth are welded on the conical portion.

[0009] In the above technical solution, the injection port sealing plate is circular, and has four injection ports. The four injection ports are respectively arranged at 0°, 90°, 180°, and 270° of the injection port sealing plate, and the distance between each injection port and the connecting hole is twice the diameter of the injection port.

[0010] In the above technical solution, the conical portion is conical in shape, has a triangular cross section, and a bottom angle of 60°.

[0011] In the above technical solution, each group of cutting teeth includes 4 cemented carbides, and the cutting teeth are vertically welded to the conical part with an angle of 90° and are symmetrically distributed.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] 1) The utility model can more quickly and effectively break up the trapped mud when flushing the mud-entrained part in the grouting hole.

[0014] 2) The nozzle body and the injection port sealing piece in the utility model are connected and fixed by screws, which is convenient for disassembly and cleaning, and the construction is convenient, which can effectively shorten the construction period.

[0015] 3) The cone vertex angle of the cone portion in the utility model is 60°, and cutting teeth are symmetrically distributed on the cone surface, which can effectively cut and crush the mud and sediment in the grouting hole in the mud-entrained area, thereby improving the flushing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front schematic diagram of the utility model.

[0017] Figure 2 It is a side schematic diagram of the utility model.

[0018] Figure 3 It is a schematic diagram of the structure of the nozzle body.

[0019] Figure 4 This is a schematic diagram of the structure of the injection port sealing piece.

[0020] Among them, 1-nozzle body, 11-thread, 12-conical part, 13-groove, 14-connecting screw hole, 2-injection port sealing piece, 21-connecting hole, 22-injection port, 3-cutting tooth. DETAILED DESCRIPTION

[0021] The following is a detailed description of the implementation of the utility model in conjunction with the accompanying drawings, but they do not constitute a limitation of the utility model and are only used as examples. At the same time, the advantages of the utility model will become clearer and easier to understand through the description.

[0022] Referring to the attached drawings, it can be seen that: a high-pressure jet flushing device for curtain grouting of mud-containing strata is characterized by comprising a nozzle body 1 and two jet port sealing pieces 2 symmetrically arranged on the sides of the nozzle body 1; the top of the nozzle body 1 is connected to the grouting drill rod through a thread 11, and a conical portion 12 is arranged at the bottom;

[0023] A connecting hole 21 is provided in the middle of the injection port sealing plate 2, and a plurality of injection ports 22 are provided on the injection port sealing plate 2; the connecting hole 21 connects the injection port sealing plate 2 to the nozzle body 1 through a screw and a nut; a connecting screw hole 14 matching the connecting hole 21 is provided at the connection between the nozzle body 1 and the injection port sealing plate 2.

[0024] A groove 13 is provided at the connection between the side surface of the nozzle body 1 and the injection port sealing piece 2 , the connecting screw hole 14 is located in the groove 13 , and the injection port sealing piece 2 is located in the groove 13 .

[0025] A plurality of groups of cutting teeth 3 are welded to the conical portion 12 .

[0026] The injection port sealing plate 2 is circular, and the connecting hole 21 is located in the center. There are four injection ports 22 on the injection port sealing plate 2. The four injection ports 22 are respectively arranged at 0°, 90°, 180°, and 270° of the injection port sealing plate 2. The distance between each injection port 22 and the connecting hole 21 is twice the diameter of the injection port 22.

[0027] The conical portion 12 is conical in shape, has a triangular cross section, and a bottom angle of 60°.

[0028] Each group of cutting teeth 3 includes four hard alloys. The cutting teeth 3 are vertically welded to the conical portion 12 with an included angle of 90° and are symmetrically distributed.

[0029] The method of using the utility model comprises the following steps:

[0030] Step 1: Construction preparation, determine the scope of the mud-enclosed area of ​​the grouting hole;

[0031] Step 2: Assemble the high-pressure jet flushing device, and connect the nozzle body 1 and the jet port sealing piece 2 through a screw;

[0032] Step 3: Determine the length of the grouting drill rod according to the position of the mud-enclosed part in the grouting hole, and connect the nozzle body 1 to the grouting drill rod through the thread 11;

[0033] Step 4: Lower the grouting drill rod to the mud-enclosed area, input high-pressure flushing fluid through a high-pressure pump, rotate and slowly lift the grouting drill rod to cut, crush and flush the mud-enclosed area, and the mud is carried up and out of the grouting hole by the high-pressure flushing fluid.

[0034] The utility model can more quickly and effectively break the mud when washing the mud-entrained part in the grouting hole. The nozzle body and the injection port sealing piece in the utility model are connected and fixed by a screw rod, which is convenient for disassembly and cleaning, and the construction is convenient, which can effectively shorten the construction period.

[0035] Other parts not described belong to the prior art.

Claims

1. A high-pressure jet flushing device for curtain grouting in muddy strata, characterized in that: It comprises a nozzle body (1) and two injection port sealing pieces (2) symmetrically arranged on the sides of the nozzle body (1); the top of the nozzle body (1) is connected to the grouting drill rod through a thread (11), and the bottom is provided with a conical portion (12); A connecting hole (21) is provided in the middle of the injection port sealing piece (2), and a plurality of injection ports (22) are provided on the injection port sealing piece (2); the connecting hole (21) connects the injection port sealing piece (2) to the nozzle body (1) via a screw and a nut.

2. The high-pressure jet flushing device for curtain grouting in muddy strata according to claim 1 is characterized by: A groove (13) is provided at the connection between the side surface of the nozzle body (1) and the injection port sealing piece (2), and the injection port sealing piece (2) is located in the groove (13).

3. The high-pressure jet flushing device for curtain grouting in muddy strata according to claim 1 is characterized by: A plurality of groups of cutting teeth (3) are welded on the conical portion (12).

4. The high-pressure jet flushing device for curtain grouting in muddy strata according to claim 1 is characterized by: The injection port sealing piece (2) is circular and has four injection ports (22). The four injection ports (22) are respectively arranged at 0°, 90°, 180° and 270° of the injection port sealing piece (2). The distance between each injection port (22) and the connecting hole (21) is twice the diameter of the injection port (22).

5. The high-pressure jet flushing device for curtain grouting in muddy strata according to claim 1 is characterized by: The conical portion (12) is conical in shape, has a triangular cross section, and a bottom angle of 60°.

6. The high-pressure jet flushing device for curtain grouting in muddy strata according to claim 3 is characterized by: Each group of cutting teeth (3) comprises four hard alloys. The cutting teeth (3) are vertically welded to the conical portion (12) with an included angle of 90° and are symmetrically distributed.

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