Bidirectional cement-soil mixing pile anti-blocking structure

Abstract

The utility model discloses a bi-directional cement mixing pile anti-blocking structure which comprises a screw-in drill rod, a mixing extension rod and a mixing sleeve rod, the screw-in drill rod is connected with a guniting blade, the guniting blade comprises a box body, the box body is connected with a spray head, a plurality of scraping assemblies are arranged in the box body, and the scraping assemblies are connected with the spray head. A first sealing assembly and a second sealing assembly are arranged at the two ends of the stirring sleeve rod respectively, the first sealing assembly comprises a tray and a first movable ring, a first flange plate is connected to the exterior of the first movable ring in a sealed mode, the second sealing assembly comprises a second flange plate, a second movable ring is fixed to the stirring sleeve rod, and a mounting sleeve is arranged outside the second movable ring. According to the bidirectional cement-soil mixing pile, cement slurry can be stirred by arranging the slurry spraying blades, the cement slurry can be prevented from blocking the spraying head, the structure is simple, the practicability is improved, the sealing performance is improved by arranging the first sealing assembly and the second sealing assembly, and normal work of the bidirectional cement-soil mixing pile is fully guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation construction, in particular to a bidirectional cement soil mixing pile anti-blocking structure. Background Art

[0002] Cement mixing pile refers to an effective form of soft foundation treatment. It is a method that uses cement as the main agent of the curing agent, and uses a mixing pile machine to spray cement into the soil and fully mix it, so that a series of physical and chemical reactions occur between the cement and the soil, so that the soft soil hardens and the foundation strength is improved. The existing patent (Announcement No.: CN110952522A) discloses a double-spray bidirectional cement mixing pile drill bit and its construction method. The invention expands the spraying range by setting the spraying port on the blade, which is conducive to the diffusion and mixing of cement in the soil. At the same time, the blade is used to fully mix the cement and soil to achieve a good construction effect. However, in actual application, due to the relatively small internal space of the blade, the cement is fully in contact with the inner wall of the blade, making it easier to adhere to the inner wall of the blade, and it is easy to block the spraying port of the blade, which is not conducive to spraying. In addition, the lack of effective sealing between the inner and outer drill rods will cause cement to enter the gap between the inner and outer drill rods, affecting the normal operation of the inner and outer drill rods. To this end, we propose a bidirectional cement soil mixing pile anti-blocking structure. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a bidirectional cement-soil mixing pile anti-blocking structure.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A bidirectional cement-soil mixing pile anti-blocking structure is designed, comprising a screw-in drill rod, a stirring connecting rod and a stirring sleeve rod, the screw-in drill rod is coaxially connected with the stirring connecting rod, the stirring sleeve rod is sleeved on the stirring connecting rod, the screw-in drill rod is connected with a shotcrete blade, the shotcrete blade comprises a box body, the box body is connected with a nozzle, and a plurality of scraping assemblies are movably arranged in the box body, gears are respectively installed on the stirring connecting rod and the stirring sleeve rod, sealing assembly 1 and sealing assembly 2 are respectively arranged at two ends of the stirring sleeve rod, the sealing assembly 1 comprises a tray fixed to the stirring sleeve rod, a dynamic ring 1 assembled with the stirring connecting rod, the dynamic ring 1 is externally sealed with a flange plate 1, the sealing assembly 2 comprises a flange plate 2 fixed to the stirring connecting rod, a dynamic ring 2 is installed on the stirring sleeve rod, and a mounting sleeve is provided on the dynamic ring 2 to seal with it.

[0006] In the above scheme, spiral blades are fixed along the surface of the screw-in drill rod, and stirring teeth are evenly fixed on the outer surface of the box body.

[0007] In the above solution, the scraping assembly includes a roller, and a scraper is fixed on the roller.

[0008] In the above scheme, a delivery pipe is installed on the screw-in drill rod, and the end of the box body is connected to a connecting pipe threadedly connected to the delivery pipe.

[0009] In the above scheme, the stirring connecting rod and the stirring sleeve rod are both detachably connected with stirring blades, the stirring connecting rod and the stirring sleeve rod are both fixed with connecting rods, and the end of the stirring blade is fixed with an assembly set threadedly connected to the connecting rod.

[0010] In the above scheme, a rubber ring 1 cooperating with a moving ring 1 is installed in the flange 1, and a tray with packing arranged therein is connected to the bottom of the flange 1.

[0011] In the above scheme, a water stop strip is embedded in the inner wall of the second flange, and a mounting groove is provided in the second flange. A compression spring connected to the water stop strip is installed in the mounting groove, and a rubber ring second cooperating with the second moving ring is embedded in the upper end of the mounting sleeve, and the lower end of the mounting sleeve cooperates with the stirring sleeve rod through a combined water stop part.

[0012] The advantages and beneficial effects of the utility model are as follows: by setting the spraying blades and using the box body as a transition structure for cement slurry, the cement slurry is sprayed outward through the nozzle, and the scraping assembly is used to rotate the roller with the help of the power of the cement slurry flow, thereby driving the scraper to rotate in the box body, so that the end of the scraper is in contact with the inner wall of the box body, so that it rubs against the inner wall of the box body. Compared with the prior art, not only can the spraying blades be used to stir the output cement slurry, but the scraper can also be used to remove the cement slurry attached to the inner wall of the box body, so as to prevent the cement slurry from A large amount of material adheres to the inner wall of the box body and blocks the nozzle. The structure is simple and practicality is improved. By setting up sealing components one and two, the packing and rubber ring one are used to seal the upper end of the stirring sleeve rod and the stirring connecting rod respectively, and then the water stop strip and rubber ring two are used to seal the lower end of the stirring sleeve rod and the stirring connecting rod respectively, so as to fully seal the gap between the stirring connecting rod and the stirring sleeve rod. At the same time, the dynamic ring one and the dynamic ring two are used to make the stirring connecting rod and the stirring sleeve rod still able to move relative to each other, so as to fully ensure the normal operation of the two-way cement soil mixing pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1 This is a structural schematic diagram of a bidirectional cement-soil mixing pile anti-blocking structure proposed by the utility model;

[0015] Figure 2A schematic diagram of the structure of a shotcrete blade of a bidirectional cement-soil mixing pile anti-blocking structure proposed by the utility model;

[0016] Figure 3 A schematic diagram of the connection structure of the mixing blades of a bidirectional cement-soil mixing pile anti-blocking structure proposed by the utility model;

[0017] Figure 4 It is a structural schematic diagram of a sealing component 1 and a sealing component 2 of a bidirectional cement soil mixing pile anti-blocking structure proposed by the utility model;

[0018] Figure 5 for Figure 4 Enlarged schematic diagram at point A in the middle.

[0019] In the figure: screw-in drill rod 1, stirring connecting rod 2, stirring sleeve rod 3, spiral blade 4, spraying blade 5, box body 51, stirring teeth 52, nozzle 53, roller 54, scraper 55, connecting pipe 56, conveying pipe 6, stirring blade 7, sealing component 1 8, tray 81, packing 82, flange 1 83, moving ring 1 84, rubber ring 1 85, sealing component 2 9, installation sleeve 91, moving ring 2 92, rubber ring 2 93, combined water stop 94, flange 2 95, water stop strip 96, installation groove 97, compression spring 98, gear 10, connecting rod 11, assembly set 12. DETAILED DESCRIPTION

[0020] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0021] See also Figure 1-5 The utility model provides a technical solution: a bidirectional cement-soil mixing pile anti-blocking structure, comprising a screw-in drill rod 1, a stirring connecting rod 2 and a stirring sleeve rod 3, the screw-in drill rod 1 is coaxially connected with the stirring connecting rod 2, the stirring sleeve rod 3 is sleeved on the stirring connecting rod 2, the screw-in drill rod 1 is connected with a spraying blade 5, the spraying blade 5 comprises a box body 51, the box body 51 is connected with a nozzle 53, the box body 51 is inclined, and when the box body 51 rotates around the screw-in drill rod 1, the cement slurry can be fully stirred;

[0022] Furthermore, spiral blades 4 are fixed along the surface of the screw-in drill rod 1, and the shotcrete blades 5 and the spiral blades 4 are arranged alternately. The spiral blades 4 can not only help to discharge the rock debris in the hole during drilling, prevent the occurrence of drill sticking and locking, but also increase the bending strength and fatigue resistance of the screw-in drill rod 1, and extend the service life of the screw-in drill rod 1. Stirring teeth 52 are evenly fixed on the outer surface of the box body 51. The stirring teeth 52 are used to further increase the contact area between the shotcrete blades 5 and the external cement slurry, thereby promoting sufficient stirring;

[0023] A plurality of scraping components are movably disposed in the box body 51;

[0024] Specifically, the scraping assembly includes a roller 54 whose two ends are connected to the inner wall of the box body 51 through a rotating shaft, and the roller 54 is arranged parallel to the box body 51, so that the roller 54 has a tendency to rotate under the action of gravity, and a scraper 55 is fixed on the roller 54, and the scraper 55 is arc-shaped, and the four sides of the scraper 55 are respectively in contact with the corresponding inner wall of the box body 51, so as to remove the cement slurry attached to the inner wall of the box body 51;

[0025] Furthermore, a delivery pipe 6 connected to the high-pressure grouting pipe is fixedly installed in the drill rod 1, so that the cement slurry is transported downward into the delivery pipe 6 at a high speed. A connecting pipe 56 threadedly connected to the delivery pipe 6 is connected to the end of the box body 51. The connecting pipe 56 and the delivery pipe 6 are used to indirectly connect the box body 51 to the high-pressure grouting pipe, thereby receiving the cement slurry.

[0026] Specifically, by setting the spraying blade 5 and utilizing the box body 51 as a transition structure for the cement slurry, the cement slurry is sprayed outward through the nozzle 53, and the scraping component is used to rotate the roller 54 with the help of the power of the cement slurry flow, thereby driving the scraper 55 to rotate in the box body 51, so that the end of the scraper 55 abuts against the inner wall of the box body 51, and rubs against the inner wall of the box body 51. Compared with the prior art, not only can the spraying blade 5 be used to stir the outputted cement slurry, but the scraper 55 can also be used to remove the cement slurry attached to the inner wall of the box body 51, so as to prevent a large amount of cement slurry from adhering to the inner wall of the box body 51 and clogging the nozzle 53. The structure is simple and the practicality is improved.

[0027] Gears 10 are respectively installed on the stirring connecting rod 2 and the stirring sleeve rod 3, so that the gears 10 are respectively connected to the driving device. The power provided by the driving device is used to drive the stirring connecting rod 2 and the stirring sleeve rod 3 to rotate, so that the stirring connecting rod 2 drives the screwed-in drill rod 1 to rotate in the same direction.

[0028] Further, the stirring connecting rod 2 and the stirring sleeve rod 3 are both detachably connected with the stirring blade 7, the stirring connecting rod 2 and the stirring sleeve rod 3 are both fixed with a connecting rod 13, and the end of the stirring blade 7 is fixed with an assembly sleeve 12 threadedly connected with the connecting rod 13; the stirring blade 7 of different lengths can be replaced by disassembling the assembly sleeve 12 and the connecting rod 13 to match piles of different radii;

[0029] The two ends of the stirring sleeve rod 3 are respectively provided with a sealing component 1 8 and a sealing component 2 9. The sealing component 1 8 includes a tray 81 fixed to the stirring sleeve rod 3 and a moving ring 1 84 coaxially installed with the stirring connecting rod 2. The moving ring 1 84 is sealed with a flange 1 83 outside, and the flange 1 83 is locked with the tray 81 through a fastener;

[0030] Furthermore, a rubber ring 85 is installed in the flange 83 to match the moving ring 84. The rubber ring 85 is located at the upper and lower sides of the moving ring 84. The bottom of the flange 83 is connected to a tray 81 with a packing 82 inside. The full packing 82 is used to improve the sealing performance between the flange 83 and the tray 81.

[0031] The sealing assembly 2 9 comprises a flange 2 95 coaxially fixed with the stirring connecting rod 2, a moving ring 2 92 is coaxially mounted on the stirring sleeve rod 3, and a mounting sleeve 91 is provided outside the moving ring 2 92 to seal with the moving ring 2;

[0032] Further, a water stop strip 96 is embedded in the inner wall of the second flange 95, and a mounting groove 97 is provided in the second flange 95. A compression spring 98 connected to the water stop strip 96 is installed in the mounting groove 97. When the water stop strip 96 contacts water, it expands rapidly, thereby squeezing the compression spring 98 which is originally in a naturally stretched state. The elastic force of the compression spring 98 is used to press the water stop strip 96 tightly against the surface of the stirring rod 2 to improve the sealing effect. A rubber ring 93 which cooperates with the second moving ring 92 is embedded in the upper end of the installation sleeve 91. The lower end of the installation sleeve 91 cooperates with the stirring sleeve rod 3 through a combined water stop piece 94. The bottom end of the stirring sleeve rod 3 is in an inverted cone shape to reduce the area that can contact with cement. The combined water stop piece 94 is embedded in the inner wall of the installation sleeve 91 and is parallel to the side wall of the end face of the stirring sleeve rod 3, so that the combined water stop piece 94 is in full contact with the stirring sleeve rod 3 to improve the sealing performance.

[0033] Furthermore, a bearing connected to the moving ring 1 84 is installed in the flange 1 83, and a bearing connected to the moving ring 2 92 is installed in the mounting sleeve 91. The bearings are used to make the relative rotation between the stirring connecting rod 2 and the stirring sleeve rod 3 smoother, thereby facilitating the construction.

[0034] Specifically, by setting up sealing component 1 8 and sealing component 2 9, using packing 82 and rubber ring 1 85, the upper end of the mixing sleeve rod 3 and the mixing connecting rod 2 are sealed respectively, and then the water stop strip 96 and rubber ring 2 93 are used to seal the lower end of the mixing sleeve rod 3 and the mixing connecting rod 2 respectively, so as to fully seal the gap between the mixing connecting rod 2 and the mixing sleeve rod 3. At the same time, by using dynamic ring 1 84 and dynamic ring 2 92, the mixing connecting rod 2 and the mixing sleeve rod 3 can still move relative to each other, so as to fully ensure the normal operation of the bidirectional cement soil mixing pile.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A bidirectional cement soil mixing pile anti-blocking structure, comprising a screw-in drill rod (1), a mixing connecting rod (2) and a mixing sleeve rod (3), characterized in that: The screw-in drill rod (1) is coaxially connected to the stirring connecting rod (2), the stirring sleeve rod (3) is sleeved on the stirring connecting rod (2), the screw-in drill rod (1) is connected to a spray blade (5), the spray blade (5) comprises a box body (51), a nozzle (53) is connected to the box body (51), and a plurality of scraping components are movably arranged in the box body (51), the stirring connecting rod (2) and the stirring sleeve rod (3) are respectively installed with gears (10), and the two ends of the stirring sleeve rod (3) are respectively provided with sealing The invention relates to a first component (8) and a second sealing component (9), wherein the first sealing component (8) comprises a tray (81) fixed to the stirring sleeve rod (3), a moving ring (84) assembled to the stirring connecting rod (2), the moving ring (84) being externally sealed with a flange (83), the second sealing component (9) comprising a flange (95) fixed to the stirring connecting rod (2), the stirring sleeve rod (3) being equipped with a moving ring (92), the moving ring (92) being externally provided with a mounting sleeve (91) which is sealed therewith.

2. A bidirectional cement soil mixing pile anti-blocking structure according to claim 1, characterized in that: A spiral blade (4) is fixed along the surface of the screw-in drill rod (1), and stirring teeth (52) are evenly fixed on the outer surface of the box body (51).

3. A bidirectional cement soil mixing pile anti-blocking structure according to claim 1, characterized in that: The scraping assembly comprises a roller (54), on which a scraper (55) is fixed.

4. The bidirectional cement-soil mixing pile anti-blocking structure according to claim 1 is characterized in that: The screw-in drill rod (1) is provided with a delivery pipe (6), and the end of the box body (51) is connected with a connecting pipe (56) threadedly connected to the delivery pipe (6).

5. The bidirectional cement-soil mixing pile anti-blocking structure according to claim 1 is characterized in that: The stirring connecting rod (2) and the stirring sleeve rod (3) are both detachably connected with stirring blades (7), the stirring connecting rod (2) and the stirring sleeve rod (3) are both fixed with connecting rods (13), and the end of the stirring blade (7) is fixed with an assembly sleeve (12) threadedly connected to the connecting rod (13).

6. The bidirectional cement-soil mixing pile anti-blocking structure according to claim 1, characterized in that: A rubber ring (85) matched with a moving ring (84) is installed in the flange (83), and a tray (81) with a packing (82) inside is connected to the bottom of the flange (83).

7. The bidirectional cement-soil mixing pile anti-blocking structure according to claim 1, characterized in that: The inner wall of the second flange (95) is embedded with a water stop strip (96), and a mounting groove (97) is provided in the second flange (95). A compression spring (98) connected to the water stop strip (96) is installed in the mounting groove (97). The upper end of the mounting sleeve (91) is embedded with a rubber ring (93) matched with the second moving ring (92), and the lower end of the mounting sleeve (91) is matched with the stirring sleeve rod (3) through a combined water stop member (94).

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