Modularized low-pressure automatic grouting machine

Abstract

The utility model relates to soft soil solidification, and provides a modularized low-pressure automatic grouting machine which comprises a plurality of grouting modules connected end to end, a grouting pipe of a porous structure and a connecting pipe. The grouting module comprises a shell, a grout bag arranged in the shell, a liquid inlet pipe and a liquid outlet pipe which are arranged at the same end of the grout bag, and an extrusion device used for extruding the grout bag. The liquid inlet pipes and the liquid outlet pipes penetrate through the shell, the connecting pipes are used for connecting the liquid inlet pipes and the liquid outlet pipes of the adjacent slurry bags, and the grouting pipe is connected with the liquid outlet pipe of the most downstream slurry bag. According to the modularized low-pressure automatic grouting machine, the amount of a needed curing agent can be preset according to needs, follow-up supplementing is avoided, and the grouting pressure of grout can be accurately adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of soft soil solidification, and particularly to a modular low-pressure automatic grouting machine. Background Art

[0002] When carrying out infrastructure construction on soft soil areas, it is necessary to first strengthen the soft soil foundation. A relatively common method is to make the soft soil curing agent enter the soft soil under high pressure, and the soft soil is solidified through physical and chemical reactions. The soft soil curing agent refers to an inorganic hydraulic cementitious material used for solidifying soft soil and other fine-grained soils. After being fully mixed with the soil, through the physical and chemical reactions between its own components and with the soil, it can significantly improve the physical and mechanical properties of the soil, and can form a solidified body that meets environmental standards and maintains long-term stability.

[0003] Soft soil reinforcement requires a grouting method with low pressure and low disturbance to inject the reinforcement agent into the soft soil. It is necessary to continuously inject the material into the soft soil under low pressure for a long time. However, the current grouting machines or syringes cannot be used in the shield tunnel during operation. The traditional grouting machine has too high a grouting pressure, which is easy to form compaction grouting rather than permeation grouting, resulting in structural deformation. Moreover, the device has too large a volume and low automation, and requires manual control, so it cannot be installed and fixed in the operating tunnel. The traditional syringe stores too little slurry, and the pressure provided by the spring is difficult to control. The injection speed in the initial stage of injection is much greater than that in the later stage, which is easy to cause the soft soil to bulge rapidly in the initial stage and the reinforcement agent to overflow. At the same time, the syringe has no stable fixing measures and is easy to fall off due to the high-speed operation of the train, triggering operating accidents. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a modular low-pressure automatic grouting machine, which can preset the required amount of the curing agent according to needs to avoid subsequent supplementary addition, and can also accurately adjust the injection pressure of the slurry.

[0005] The utility model is realized through the following technical solutions: The modular low-pressure automatic grouting machine of the utility model includes a plurality of grouting modules connected end to end, a grouting pipe with a porous structure, and a connecting pipe; the grouting module includes a housing, a slurry bag arranged in the housing, a liquid inlet pipe and a liquid discharge pipe arranged at the same end of the slurry bag, and an extrusion device for extruding the slurry bag; the liquid inlet pipe and the liquid discharge pipe penetrate through the housing, the connecting pipe is used to connect the liquid inlet pipe and the liquid discharge pipe of adjacent slurry bags, and the grouting pipe is connected to the liquid discharge pipe of the most downstream slurry bag.

[0006] Further, the extrusion device includes a slider hermetically and slidably disposed at one end of the interior of the housing away from the liquid inlet pipe, and a driving device for driving the slider to move along the length direction of the housing; the slider abuts against the outer wall of the slurry bag at one end away from the liquid inlet pipe.

[0007] Further, the driving device includes a pneumatic pipe communicated with one end of the housing close to the slider, and a first air pump connected to the pneumatic pipe.

[0008] Further, the housing is strip-shaped, and the slider moves along the length direction of the housing.

[0009] Further, the projection of the housing on the plane perpendicular to its length direction is arc-shaped.

[0010] Further, the liquid inlet pipe is provided with a first one-way valve for preventing the slurry from flowing out of the slurry bag; the liquid discharge pipe is provided with a second one-way valve for preventing the slurry in the liquid discharge pipe from flowing into the slurry bag.

[0011] Further, one end of the housing close to the liquid inlet pipe is an open end, and a cover plate is detachably connected to the open end of the housing. The cover plate is provided with through holes for the liquid inlet pipe and the liquid discharge pipe to pass through.

[0012] Further, it further includes a three-way pipe connected to the liquid discharge pipe of the uppermost slurry bag. One end of the three-way pipe is connected to the connecting pipe, and the other end is connected to a pressurizing pipe. The pressurizing pipe is connected to a second air pump.

[0013] Further, a pressure gauge is provided at the liquid discharge pipe, and a laser rangefinder is provided on one side of the housing close to the slider. The probe of the laser rangefinder is disposed inside the housing and faces the slider.

[0014] The technical solution of the present utility model has at least the following advantages and beneficial effects: For the modular low-pressure automatic grouting machine of the present utility model, when in use, first connect multiple grouting modules through a connecting pipe, then embed the grouting pipe into the soft soil, and press the housing tightly against the outer wall of the soil layer. At this time, the slurry bag in the housing can be slowly squeezed by the squeezing device, so that the slurry inside the slurry bag slowly enters the grouting pipe through the drain pipe and gradually penetrates into the soft soil, thereby solidifying the inside of the soft soil. During this process, by setting multiple grouting modules connected end to end, the slurry bags in each grouting module are connected through a connecting pipe, so that the slurry in each slurry bag can penetrate into the soft soil through the grouting pipe. The corresponding number of grouting modules can be connected according to the required amount of slurry, and there is no need to replenish the slurry midway, making it more versatile. And the injection rate of the slurry can be adjusted more controllably and constantly by setting the extrusion force of the squeezing device. During the grouting process, each housing is tightly attached to the inner wall of the soft soil layer, so the space it occupies is smaller. For places such as tunnels, it will not only not affect other pipelines, but also not affect the running vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a schematic structural diagram of the modular low-pressure automatic grouting machine provided by the embodiment of the present utility model;

[0017] Figure 2 It is a schematic structural diagram inside the modular low-pressure automatic grouting machine provided by the embodiment of the present utility model;

[0018] Figure 3 It is a schematic structural diagram of the grouting module part provided by the embodiment of the present utility model;

[0019] Figure 4 It is a schematic structural diagram inside the grouting module provided by the embodiment of the present utility model;

[0020] Figure 5 It is a schematic structural diagram of the slurry bag part provided by the embodiment of the present utility model.

[0021] Reference numerals: 11 - housing, 12 - cover plate, 13 - slurry bag, 14 - liquid inlet pipe, 15 - drain pipe, 16 - slider, 17 - air pressure pipe, 18 - laser rangefinder, 21 - connecting pipe, 22 - grouting pipe, 23 - three-way pipe, 24 - pressure pipe. Detailed implementation manners

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. The components of the embodiments of the present utility model usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model claimed, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0024] It should be noted that: like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0025] In the description of the present utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this application is usually placed during use, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0026] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, if terms such as "set", "installed", "connected", "connected" are understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0027] Embodiment

[0028] The following is further described with specific embodiments. As shown in the attached Figure 1 - attached Figure 5As shown, the modular low-pressure automatic grouting machine of this embodiment includes a plurality of grouting modules connected end to end, a grouting pipe 22 with a porous structure, and a connecting pipe 21; the grouting module includes a shell 11, a slurry bag 13 arranged in the shell 11, an inlet pipe 14 and a discharge pipe 15 arranged at the same end of the slurry bag 13, and an extrusion device for squeezing the slurry bag 13; the inlet pipe 14 and the discharge pipe 15 are arranged through the shell 11, the connecting pipe 21 is used to connect the inlet pipe 14 and the discharge pipe 15 of adjacent slurry bags 13, and the grouting pipe 22 is connected to the discharge pipe 15 of the most downstream slurry bag 13. Specifically, when in use, multiple grouting modules are first connected through the connecting pipe 21, and then the grouting pipe 22 is embedded in the soft soil, and the shell 11 is tightly attached to the outer wall of the soil layer. At this time, the slurry bag 13 in the shell 11 can be slowly squeezed by the extrusion device, so that the slurry inside the slurry bag 13 slowly enters the grouting pipe 22 through the drainage pipe 15, and gradually penetrates into the soft soil, and then solidifies the soft soil. In this process, by setting multiple grouting modules connected end to end, the slurry bag 13 in each grouting module is connected through the connecting pipe 21, so that the slurry in each slurry bag 13 can penetrate into the soft soil through the grouting pipe 22, and the corresponding number of grouting modules can be connected according to the amount of slurry required, without the need to add slurry midway, and the versatility is stronger. And the injection rate of the slurry can be adjusted more controllably and constantly by setting the extrusion force of the extrusion device.

[0029] The extrusion device in this embodiment includes a slider 16 that is sealed and slidably arranged inside the housing 11 at one end away from the liquid inlet pipe 14, and a driving device for driving the slider 16 to run along the length direction of the housing 11; the slider 16 abuts against the outer wall of the slurry bag 13 at one end away from the liquid inlet pipe 14. The driving device includes an air pressure pipe 17 that is connected to the end of the housing 11 close to the slider 16, and a first air pump connected to the air pressure pipe 17. Specifically, the first air pump injects gas into the housing 11 through the air pressure pipe 17, so that the housing 11 maintains a constant air pressure, and the air pressure acts on the slider 16, so that the slider 16 produces a constant extrusion force on the slurry bag 13, so that the slurry can be squeezed out at a relatively constant rate. The air pressure intensity can be adjusted according to actual conditions, and then the extrusion rate of the slurry can be regulated. In the case of multiple slurry bags 13 connected in series, the most upstream slurry bag 13 can be squeezed first, and then the downstream slurry bags 13 can be squeezed in sequence, or multiple slurry bags 13 can be squeezed synchronously.

[0030] The housing 11 in this embodiment is in the shape of an elongated strip, and the slider 16 moves along the length direction of the housing 11. The projection of the housing 11 on a plane perpendicular to its length direction is in the shape of an arc. Specifically, the arc-shaped and elongated housing 11 can better adapt to the soft soil hardening treatment of the inner wall of the tunnel, can better fit on the inner wall of the tunnel, and can avoid conflict with the original pipelines in the tunnel as much as possible.

[0031] In this embodiment, the liquid inlet pipe 14 is provided with a first one-way valve, which is used to prevent the slurry from flowing out of the slurry bag 13; the drain pipe 15 is provided with a second one-way valve, which is used to prevent the slurry in the drain pipe 15 from flowing into the slurry bag 13. Specifically, setting the first one-way valve and the second one-way valve can effectively prevent the slurry from flowing back.

[0032] One end of the housing 11 in this embodiment close to the liquid inlet pipe 14 is an open end, and the open end of the housing 11 is detachably connected with a cover plate 12, and the cover plate 12 is provided with through holes for the liquid inlet pipe 14 and the drain pipe 15 to pass through. Specifically, this can replace the slurry bag 13 more quickly, and the slurry can also be directly re-injected into the slurry bag 13 through the liquid inlet pipe 14.

[0033] In this embodiment, it further includes a three-way pipe 23 connected to the drain pipe 15 of the uppermost slurry bag 13. One end of the three-way pipe 23 is connected to the connecting pipe 21, and the other end is connected with a pressure pipe 24, and the pressure pipe 24 is connected with a second air pump. Specifically, as shown in the appendix Figure 5 After all the slurry in all the slurry bags 13 is squeezed out, the second air pump can be used to inject gas into the three-way pipe 23 through the pressure pipe 24, and the gas can also squeeze all the slurry in the connecting pipe 21 into the grouting pipe 22 to avoid waste.

[0034] In this embodiment, a pressure gauge is provided at the drain pipe 15, and a laser rangefinder 18 is provided on one side of the housing 11 close to the slider 16. The probe of the laser rangefinder 18 is arranged inside the housing 11 and faces the slider 16. Specifically, the pressure gauge can be used to detect whether all the slurry in the slurry bag 13 has been squeezed out, while the laser rangefinder 18 is used to measure the distance between it and the slider 16, so as to know the moving distance of the slider 16, and thus the remaining slurry volume in the slurry bag 13 can be roughly obtained.

[0035] In summary, for the modular low-pressure automatic grouting machine of this embodiment, when in use, first connect multiple grouting modules through the connecting pipe 21, then embed the grouting pipe 22 into the soft soil, and press the housing 11 tightly against the outer wall of the soil layer. At this time, the slurry bag 13 in the housing 11 can be slowly squeezed by the squeezing device, so that the slurry inside the slurry bag 13 slowly enters the grouting pipe 22 through the drain pipe 15 and gradually penetrates into the soft soil, thereby performing solidification treatment on the inside of the soft soil. During this process, by setting multiple grouting modules connected end to end, the slurry bags 13 in each grouting module are connected through the connecting pipe 21, so that the slurry in each slurry bag 13 can penetrate into the soft soil through the grouting pipe 22. The corresponding number of grouting modules can be connected according to the required amount of slurry, and there is no need to replenish the slurry midway, and the versatility is stronger. And the injection rate of the slurry can be adjusted more controllably and constantly by setting the extrusion force of the squeezing device.

[0036] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A modular low-pressure automatic grouting machine, characterized in that: It includes a plurality of grouting modules connected end to end, a grouting pipe (22) with a porous structure, and a connecting pipe (21); The grouting module includes a housing (11), a slurry bag (13) arranged in the housing (11), a liquid inlet pipe (14) and a liquid discharge pipe (15) arranged at the same end of the slurry bag (13), and an extrusion device for extruding the slurry bag (13); The liquid inlet pipe (14) and the liquid discharge pipe (15) are arranged to penetrate through the housing (11), the connecting pipe (21) is used to connect the liquid inlet pipe (14) and the liquid discharge pipe (15) of adjacent slurry bags (13), and the grouting pipe (22) is connected to the liquid discharge pipe (15) of the most downstream slurry bag (13).

2. The modular low-pressure automatic grouting machine according to claim 1, characterized in that: The extrusion device includes a slider (16) sealed and slidably arranged at one end of the housing (11) away from the liquid inlet pipe (14), and a driving device for driving the slider (16) to move along the length direction of the housing (11); the slider (16) abuts against the outer wall of the slurry bag (13) at one end away from the liquid inlet pipe (14).

3. The modular low-pressure automatic grouting machine according to claim 2, wherein: The driving device includes a pneumatic pipe (17) communicated with one end of the housing (11) close to the slider (16), and a first air pump connected to the pneumatic pipe (17).

4. The modular low-pressure automatic grouting machine according to claim 2, wherein: The housing (11) is strip-shaped, and the slider (16) moves along the length direction of the housing (11).

5. The modular low-pressure automatic grouting machine according to claim 4, characterized in that: The projection of the housing (11) on the plane perpendicular to its length direction is arc-shaped.

6. The modular low-pressure automatic grouting machine according to claim 1, characterized in that: The liquid inlet pipe (14) is provided with a first one-way valve, and the first one-way valve is used to prevent the slurry from flowing out of the slurry bag (13); The liquid discharge pipe (15) is provided with a second one-way valve, and the second one-way valve is used to prevent the slurry in the liquid discharge pipe (15) from flowing into the slurry bag (13).

7. The modular low-pressure automatic grouting machine according to claim 1, characterized in that: One end of the housing (11) close to the liquid inlet pipe (14) is an open end, and a cover plate (12) is detachably connected to the open end of the housing (11), and the cover plate (12) is provided with through holes for the liquid inlet pipe (14) and the liquid discharge pipe (15) to pass through.

8. The modular low-pressure automatic grouting machine according to claim 1, characterized in that: It also includes a three-way pipe (23) connected to the liquid discharge pipe (15) of the most upstream slurry bag (13), one end of the three-way pipe (23) is connected to the connecting pipe (21), the other end is connected with a pressure pipe (24), and the pressure pipe (24) is connected with a second air pump.

9. The modular low-pressure automatic grouting machine according to claim 2, wherein: A pressure gauge is arranged at the liquid discharge pipe (15), and a laser rangefinder (18) is arranged on one side of the housing (11) close to the slider (16), and the probe of the laser rangefinder (18) is arranged in the housing (11) and faces the slider (16).

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