Grouting device based on vacuum negative pressure cooperative driving

Abstract

The utility model discloses a grouting device based on vacuum negative pressure cooperative driving, which belongs to the technical field of grouting devices and comprises a grouting pipe, an inner cavity of the grouting pipe is communicated with a grouting component or a vacuumizing component, and a plurality of rows of grouting holes are circumferentially formed in the side wall of the grouting pipe at equal intervals. The two connecting rings are rotationally connected with the outer wall of the grouting pipe, the two connecting rings are fixedly connected and located at the two ends of the multiple rows of grouting holes respectively, a plurality of non-woven fabrics are arranged between the two connecting rings, and the multiple non-woven fabrics and the multiple rows of grouting holes are arranged in a one-to-one correspondence mode; and the driving assembly is connected with the connecting ring located on the upper portion, and the driving assembly is used for driving the connecting ring to rotate, so that the multiple non-woven fabrics shield the multiple rows of grouting holes, or the multiple non-woven fabrics leave the grouting holes. Under the dual effects of grouting pressure and vacuum negative pressure guide, grout can be more rapidly and uniformly filled in soil body holes, and the grouting effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of grouting device technology, and in particular to a grouting device based on vacuum negative pressure coordinated drive. Background Technology

[0002] Fracturing grouting is a foundation reinforcement technique that uses high-pressure grouting to inject cement or chemical grout into soil layers to improve soil properties. Due to the complex mechanical properties of soft soil, the grout mainly diffuses along weak surfaces or cracks, resulting in poor uniformity of grout filling and unsatisfactory grouting effects. Furthermore, excessive grouting pressure can cause significant disturbance to the surrounding soil, while insufficient pressure leads to inadequate grout diffusion, failing to achieve the desired grouting effect.

[0003] To address this, a grouting device based on vacuum negative pressure synergistic drive is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a grouting device based on vacuum negative pressure synergistic drive, which aims to solve or improve at least one of the above-mentioned technical problems.

[0005] To achieve the above objectives, this utility model provides the following solution: This utility model provides a grouting device based on vacuum negative pressure synergistic drive, comprising:

[0006] The grouting pipe has an inner cavity that is connected to the grouting assembly or the vacuum assembly, and the side wall of the grouting pipe has several rows of grouting holes spaced at equal intervals around the periphery.

[0007] Two connecting rings are rotatably connected to the outer wall of the grouting pipe. The two connecting rings are fixedly connected and located at both ends of several columns of grouting holes. Several non-woven fabrics are arranged between the two connecting rings, and the several non-woven fabrics are arranged one-to-one with several columns of grouting holes.

[0008] A driving assembly is connected to the connecting ring located above it. The driving assembly is used to drive the connecting ring to rotate, thereby causing a plurality of nonwoven fabrics to cover a plurality of rows of grouting holes, or causing a plurality of nonwoven fabrics to leave the grouting holes.

[0009] Preferably, support rods are fixedly connected to both sides of the nonwoven fabric, and the two ends of the support rods are fixedly connected to the two connecting rings respectively. The support rods are in sliding contact with the outer wall of the grouting pipe.

[0010] Preferably, the grouting pipe is fitted with an annular plate, the top of the annular plate is fixed to the side wall of the grouting pipe by a plurality of connecting rods, and the outer wall of the connecting ring located above slides in contact with the inner wall of the annular plate.

[0011] Preferably, the driving assembly includes a driving rod fixed to the connecting ring located above, the driving rod having a through hole, a positioning pin passing through the through hole, and two positioning grooves being formed at the top of the annular plate, the positioning pin passing through the through hole and inserted into either of the positioning grooves.

[0012] Preferably, a support ring is fixedly connected to the bottom of the annular plate. The support ring is sleeved outside the grouting pipe and is used to insert into the borehole and make close contact with the borehole wall.

[0013] Preferably, the top of the grouting pipe is threaded with a connecting pipe, and the top and side walls of the connecting pipe are respectively fixedly connected to and connected to a first branch pipe and a second branch pipe. Valves are fixedly connected to the first branch pipe and the second branch pipe respectively. The first branch pipe is connected to the grouting assembly, and the second branch pipe is connected to the vacuum assembly.

[0014] Preferably, the vacuum assembly includes a vacuum pump, and the pumping end of the vacuum pump is connected to the second branch pipe through a suction tube, on which a pressure vacuum gauge is fixedly connected.

[0015] Preferably, the grouting assembly includes a grout tank and a grouting pump. The grout tank is connected to the feed end of the grouting pump, and the discharge end of the grouting pump is connected to the first branch pipe through a connecting pipe.

[0016] This utility model discloses the following technical effects: The grouting pipe is placed inside the borehole, and a non-woven fabric is first placed over the grouting hole. The inner cavity of the grouting pipe is connected to a vacuum assembly. The vacuum assembly creates a vacuum in the inner cavity of the grouting pipe, forming a negative pressure environment. This draws air out of the soil through the grouting hole, reducing internal soil resistance and improving the uniformity of internal soil pressure, thus creating a smoother and more uniform flow path for grout penetration. Then, the non-woven fabric is removed from the grouting hole, and the inner cavity of the grouting pipe is connected to the grouting assembly. Grout is injected into the grouting pipe through the grouting assembly. Under the dual action of grouting pressure and vacuum negative pressure guidance, the grout can fill the soil pores more quickly and evenly, improving the grouting effect. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the drive component in this utility model;

[0020] Figure 3This is an axial cross-sectional view of the connecting ring, annular plate, and support ring in this utility model;

[0021] Figure 4 This is a schematic diagram of the nonwoven fabric and support rod structure in this utility model.

[0022] In the diagram: 1. Grouting pipe; 2. Grouting hole; 3. Connecting ring; 4. Non-woven fabric; 5. Support rod; 6. Annular plate; 7. Connecting rod; 8. Drive rod; 9. Positioning pin; 10. Positioning groove; 11. Support ring; 12. Connecting pipe; 13. First branch pipe; 14. Second branch pipe; 15. Valve; 16. Vacuum pump; 17. Suction pipe; 18. Grout tank; 19. Grouting pump. Detailed Implementation

[0023] 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.

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Reference Figures 1-4 This utility model provides a grouting device based on vacuum negative pressure synergistic drive, comprising:

[0026] Grouting pipe 1, the inner cavity of grouting pipe 1 is connected to grouting assembly or vacuum assembly, and several rows of grouting holes 2 are equally spaced around the side wall of grouting pipe 1.

[0027] Two connecting rings 3 are rotatably connected to the outer wall of the grouting pipe 1. The two connecting rings 3 are fixed and located at both ends of several rows of grouting holes 2 respectively. Several non-woven fabrics 4 are arranged between the two connecting rings 3, and the several non-woven fabrics 4 are arranged one-to-one with the several rows of grouting holes 2.

[0028] The drive assembly is connected to the connecting ring 3 located above. The drive assembly is used to drive the connecting ring 3 to rotate, so that a number of nonwoven fabrics 4 cover a number of rows of injection holes 2, or cause a number of nonwoven fabrics 4 to leave the injection holes 2.

[0029] Specifically, an annular groove is provided on the outer wall of the grouting pipe 1, and an annular protrusion is fixed on the inner wall of the connecting ring 3. The annular protrusion is located in the annular groove, and the connecting ring 3 can be rotated through the annular protrusion, while the connecting ring 3 is axially limited.

[0030] In some alternative embodiments, support rods 5 are fixedly connected to both sides of the nonwoven fabric 4, and the two ends of the support rods 5 are fixedly connected to two connecting rings 3 respectively. The support rods 5 slide in contact with the outer wall of the grouting pipe 1.

[0031] The nonwoven fabric 4 is supported by the support rod 5. When the nonwoven fabric 4 covers several grouting holes 2 in a row, the two support rods 5 are located on both sides of the grouting holes 2. When vacuum adsorption is performed, the air in the soil can be drawn out through the grouting holes 2 through the nonwoven fabric 4, but particulate matter can be prevented from entering the grouting holes 2, thereby avoiding blockage of the grouting holes 2.

[0032] In some alternative embodiments, the grouting pipe 1 is fitted with an annular plate 6, the top of the annular plate 6 is fixed to the side wall of the grouting pipe 1 by a plurality of connecting rods 7, and the outer wall of the connecting ring 3 located above slides in contact with the inner wall of the annular plate 6.

[0033] In some alternative embodiments, the drive assembly includes a drive rod 8 fixed to the connecting ring 3 located above, the drive rod 8 having a through hole, a positioning pin 9 passing through the through hole, and two positioning grooves 10 opening at the top of the annular plate 6, the positioning pin 9 passing through the through hole and inserted into either positioning groove 10.

[0034] When the positioning pin 9 is inserted into one of the positioning slots 10, the non-woven fabric 4 is exactly covering the grouting hole 2. At this time, the suction component can be connected for negative pressure suction. When the drive rod 8 is rotated so that the positioning pin 9 is aligned and inserted into the other positioning slot 10, the non-woven fabric 4 is exactly away from the grouting hole 2. At this time, grout is injected through the grouting component.

[0035] In some alternative embodiments, a support ring 11 is fixedly connected to the bottom of the annular plate 6. The support ring 11 is sleeved outside the grouting pipe 1 and is used to insert into the borehole and make close contact with the borehole wall.

[0036] During vacuum suction, the annular plate 6 is supported above the borehole, and the support ring 11 is inserted into the borehole and makes close contact with the borehole wall, thereby blocking the top of the borehole, reducing negative pressure leakage at the borehole, and preventing grout leakage during grouting.

[0037] In some alternative embodiments, the top of the grouting pipe 1 is threadedly connected to a connecting pipe 12, and the top and side walls of the connecting pipe 12 are respectively fixedly connected to and connected to a first branch pipe 13 and a second branch pipe 14. Valves 15 are respectively fixedly connected to the first branch pipe 13 and the second branch pipe 14. The first branch pipe 13 is connected to the grouting assembly, and the second branch pipe 14 is connected to the vacuum assembly.

[0038] In some alternative embodiments, the vacuum assembly includes a vacuum pump 16, the pumping end of which is connected to the second branch pipe 14 via a suction pipe 17, and a pressure vacuum gauge is fixedly attached to the suction pipe 17.

[0039] The negative pressure is monitored using a pressure vacuum gauge.

[0040] In some optional embodiments, the grouting assembly includes a grout tank 18 and a grouting pump 19. The grout tank 18 is connected to the inlet end of the grouting pump 19, and the outlet end of the grouting pump 19 is connected to the first branch pipe 13 through a connecting pipe. The length of the connecting pipe should not be too long.

[0041] Grouting pump 19 is responsible for generating and controlling grouting pressure during this process. Specifically, a pressure gauge can be fixed to the connecting pipe for real-time monitoring of grouting pressure. According to construction requirements, operators can adjust the output parameters of grouting pump 19 based on the pressure gauge reading.

[0042] The slurry tank 18 and the grouting pump 19 are detachably connected by a pipe. The connecting pipe is detachably connected to the grouting pump 19 and the first branch pipe 13. The suction pipe 17 is detachably connected to the vacuum pump 16 and the second branch pipe 14, which facilitates the movement of the device. The detachable connection method is specifically a snap-fit, and after snap-fit, the connection is locked by a clamp. Alternatively, it can be connected by a threaded connector. This embodiment does not impose any restrictions and can be used according to the actual situation.

[0043] How this utility model is used:

[0044] (1) Drilling and cleaning grouting holes: Arrange grouting hole positions according to the site conditions, drill to the design depth according to the design parameters, and clean the debris in the borehole to ensure that the grouting pipe 1 can be smoothly inserted into the set position.

[0045] (2) Install grouting pipe 1: Cover the grouting hole 2 with non-woven fabric 4, insert grouting pipe 1 into the soil along the grouting hole, support the annular plate 6 above the grouting hole, and support ring 11 close to the inner wall of the grouting hole. Connect the connecting pipe 12 to the grouting pipe 1, and connect the connecting pipe and suction pipe 17 to the first branch pipe 13 and the second branch pipe 14 respectively.

[0046] (3) Vacuum suction: Open valve 15 on the second branch pipe 14, close valve on the first branch pipe 13, start vacuum pump 16 to suck out air from the soil, so that a negative pressure environment is formed in the soil. Monitor the negative pressure through pressure vacuum pump. When the reading of pressure vacuum gauge remains unchanged or the rising speed is very slow, turn off vacuum pump 16.

[0047] (4) Grouting: Rotate the drive rod 8 and insert the positioning pin 9 into another positioning groove 10. At this time, the non-woven fabric 4 leaves the grouting hole 2. Close the valve 15 on the second branch pipe 14, open the valve 15 on the first branch pipe 13, and start the grouting pump 19. Under the dual action of grouting pressure and vacuum negative pressure, the grout enters the grouting pipe 1 and fills the soil.

[0048] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0049] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A grouting device based on vacuum negative pressure synergistic drive, characterized in that, include: Grouting pipe (1), the inner cavity of the grouting pipe (1) is connected to the grouting assembly or the vacuum assembly, and the side wall of the grouting pipe (1) is provided with several rows of grouting holes (2) at equal intervals in the circumference; Two connecting rings (3) are rotatably connected to the outer wall of the grouting pipe (1). The two connecting rings (3) are fixed and located at both ends of several columns of grouting holes (2). Several non-woven fabrics (4) are arranged between the two connecting rings (3). The several non-woven fabrics (4) are arranged in a one-to-one correspondence with several columns of grouting holes (2). A driving assembly is connected to the connecting ring (3) located above it. The driving assembly is used to drive the connecting ring (3) to rotate, so that a plurality of nonwoven fabrics (4) cover a plurality of rows of grouting holes (2), or cause a plurality of nonwoven fabrics (4) to leave the grouting holes (2).

2. The grouting device based on vacuum negative pressure synergistic drive according to claim 1, characterized in that: The nonwoven fabric (4) is fixedly connected to two support rods (5) on both sides respectively. The two ends of the support rods (5) are fixedly connected to the two connecting rings (3) respectively. The support rods (5) slide in contact with the outer wall of the grouting pipe (1).

3. The grouting device based on vacuum negative pressure synergistic drive according to claim 1, characterized in that: The grouting pipe (1) is fitted with an annular plate (6). The top of the annular plate (6) is fixed to the side wall of the grouting pipe (1) by a plurality of connecting rods (7). The outer wall of the connecting ring (3) located above slides in contact with the inner wall of the annular plate (6).

4. The grouting device based on vacuum negative pressure synergistic drive according to claim 3, characterized in that: The drive assembly includes a drive rod (8) fixed to the connecting ring (3) located above. The drive rod (8) has a through hole, and a positioning pin (9) passes through the through hole. The top of the annular plate (6) has two positioning grooves (10). The positioning pin (9) passes through the through hole and is inserted into either of the positioning grooves (10).

5. The grouting device based on vacuum negative pressure synergistic drive according to claim 3, characterized in that: A support ring (11) is fixedly connected to the bottom of the annular plate (6). The support ring (11) is sleeved outside the grouting pipe (1). The support ring (11) is used to insert into the borehole and make close contact with the borehole wall.

6. The grouting device based on vacuum negative pressure synergistic drive according to claim 1, characterized in that: The top of the grouting pipe (1) is threaded with a connecting pipe (12). The top and side walls of the connecting pipe (12) are respectively fixed and connected to a first branch pipe (13) and a second branch pipe (14). Valves (15) are respectively fixed on the first branch pipe (13) and the second branch pipe (14). The first branch pipe (13) is connected to the grouting assembly, and the second branch pipe (14) is connected to the vacuum assembly.

7. The grouting device based on vacuum negative pressure synergistic drive according to claim 6, characterized in that: The vacuum assembly includes a vacuum pump (16), the pumping end of the vacuum pump (16) is connected to the second branch pipe (14) through a suction pipe (17), and a pressure vacuum gauge is fixedly connected to the suction pipe (17).

8. The grouting device based on vacuum negative pressure synergistic drive according to claim 6, characterized in that: The grouting assembly includes a grout tank (18) and a grouting pump (19). The grout tank (18) is connected to the feed end of the grouting pump (19), and the discharge end of the grouting pump (19) is connected to the first branch pipe (13) through a connecting pipe.

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