A caisson dredging apparatus for preparing a well wall for lining

Abstract

The application provides a sinking well stirring and sucking device for preparing a well wall polishing assembly, and solves the technical problems that the polishing head of the existing device cannot well adapt to the uneven surface of the well wall and cannot well control the polishing thickness. The device comprises a casing, a driving unit and a polishing assembly, and is characterized in that: the polishing assembly comprises a polishing block, a mounting plate, an inner guide sleeve, an outer guide sleeve, an elastic film and a spring; the polishing block is mounted on the mounting plate; the bottom center of the mounting plate extends downward to form a mandrel; the mandrel is coaxially inserted into the inner guide sleeve; the inner guide sleeve and the mandrel are encapsulated through the annular elastic film; the inner guide sleeve is inserted into the outer guide sleeve; the inner guide sleeve and the outer guide sleeve are limited and matched through a first limiting structure to avoid swinging; the outer guide sleeve and the mandrel are limited and matched through a second limiting structure to limit the extension distance; and a plurality of springs are mounted on the outer guide sleeve for elastically abutting against the mandrel upward.

Description

Technical Field

[0001] This invention relates to the field of caisson construction equipment technology, specifically to a caisson agitation and suction device. Background Technology

[0002] Therefore, we propose a well-drilling and agitation device with a well wall grinding component. Summary of the Invention

[0003] A caisson is a construction method primarily used for building foundations or as underground space. It involves excavating a pit of a specific shape (usually circular or rectangular) in the ground, constructing a bottomless structure (the caisson) within it, and then gradually excavating and sinking the structure to the designed depth, ultimately forming a stable underground space.

[0004] Grinding the caisson walls is an important step after caisson construction, aimed at improving the stability and durability of the caisson structure. Grinding removes uneven parts, burrs, residues, etc., from the caisson walls, making them smoother, reducing groundwater seepage, preventing corrosion, and thus extending the service life of the caisson.

[0005] The existing caisson agitator can be replaced with a grinding component to grind the caisson wall. However, the existing grinding block is rigidly fixed to the output end of the drive unit, which cannot adapt well to the uneven surface of the caisson wall. In addition, during the grinding process, the entire equipment is driven by the pusher, which makes it difficult to control the grinding thickness.

[0006] (a) Technical problems to be solved

[0007] This invention provides a well-drilling and agitation device for preparing well wall grinding components, which solves the technical problems of existing equipment where the grinding head cannot adapt well to the uneven surface of the well wall and cannot effectively control the grinding thickness.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A well-drilling and agitating device for preparing well wall grinding components includes a housing, a drive unit installed inside the housing, and a grinding component detachably mounted on the output end of the drive unit extending out of the housing. Its distinguishing feature is that:

[0011] The grinding assembly includes a grinding block, a mounting plate, an inner guide sleeve, an outer guide sleeve, an elastic membrane, and springs. The grinding block is mounted on the mounting plate, and a mandrel extends downward from the bottom center of the mounting plate. The mandrel is coaxially inserted into the inner guide sleeve, and the inner guide sleeve and the mandrel are encapsulated by an annular elastic membrane. The inner guide sleeve is inserted into the outer guide sleeve, and the outer guide sleeve and the inner guide sleeve are limited by a first limiting structure, which restricts the swinging of the inner guide sleeve. The outer guide sleeve and the mandrel are limited by a second limiting structure, which restricts the extension distance of the mandrel. Several springs are installed in the outer guide sleeve, and the two ends of the springs abut against the bottom wall of the outer guide sleeve and the bottom wall of the mandrel, respectively.

[0012] Furthermore, the first limiting structure includes a guide groove disposed on the inner wall of the outer guide sleeve and a guide protrusion disposed on the outer wall of the inner guide sleeve. There are two or more guide grooves and guide protrusions, which are distributed circumferentially around the outer guide sleeve and the inner guide sleeve. The guide protrusions and guide grooves slide and guide each other vertically.

[0013] Furthermore, the second limiting structure includes a limiting block disposed on the upper part of the outer guide sleeve and a limiting groove disposed on the outer wall of the mandrel. There are two or more limiting blocks and limiting grooves, which are distributed circumferentially around the outer guide sleeve and the mandrel. The limiting blocks and limiting grooves slide and guide each other vertically.

[0014] Furthermore, each side wall of the limiting groove is provided with an inner guide slope at its upper end, and each side wall of the limiting block is provided with an outer guide slope that cooperates with the inner guide slope at its lower end.

[0015] Furthermore, the bottom wall of the limiting groove serves as a positioning reference surface and engages with the bottom wall of the limiting block.

[0016] Furthermore, the mounting plate includes a circular main body and a strip-shaped support extending outward from the circular main body, and the grinding block is mounted on the circular main body and extends outward along the strip-shaped support.

[0017] Furthermore, the mounting plate is equipped with a mounting frame, the bottom of the grinding block is mounted in the mounting frame and extends outward to form a flange, and the flange is pressed into the mounting frame by a clamp connected by bolts.

[0018] Furthermore, the circular main body has a hollowed-out section between adjacent strip-shaped support portions.

[0019] Furthermore, the housing is provided with a slurry discharge pipe, the suction end of which penetrates the housing and is located on the same side of the housing as the grinding assembly.

[0020] Furthermore, a suction cover is installed on one side of the grinding assembly of the housing. A converging groove is formed in the concave part of the suction cover. A suction pipe is installed at the bottom of the converging groove and is coaxially connected to the suction end pipe. A main suction port is formed at the end of the suction pipe and a secondary suction hole is formed on its side wall.

[0021] (III) Beneficial Effects

[0022] This invention provides a wellbore agitation and suction device for preparing wellbore grinding components, which has the following features:

[0023] Beneficial effects:

[0024] The mounting plate for installing the grinding head has a bottom spindle connected to the inner guide sleeve via an elastic diaphragm. At the same time, the spindle is elastically supported by several springs, and the spindle can swing at a certain angle to adapt to the uneven surface of the well wall, making the grinding process more gentle.

[0025] During the grinding process, the grinding head remains in contact with the increasingly thinner well wall under the action of the spring. As grinding nears completion, the second limiting structure comes into play, limiting the final position of the grinding head and allowing for better control of the grinding thickness. In addition, compared to the original installation structure, the grinding head can elastically resist the well wall under the action of the spring. Before grinding is completed, the contact between the grinding head and the well wall is gentler, avoiding over-grinding caused by difficulty in controlling the equipment's propulsion precision. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention;

[0027] Figure 2 This is a schematic cross-sectional view of the present invention;

[0028] Figure 3 for Figure 2 A magnified structural diagram of point A in the middle;

[0029] Figure 4 This is an exploded structural diagram of the grinding assembly in this invention after omitting the grinding head;

[0030] Figure 5 for Figure 4 A schematic diagram of the structure of the middle limit block, connecting block, limit ring, inner guide sleeve, spring and outer guide sleeve in operation;

[0031] Figure 6 This is a cross-sectional view of the grinding assembly in this invention, omitting the grinding head.

[0032] Figure 7 for Figure 6 A magnified structural diagram of section B in the middle;

[0033] Figure 8This is a schematic diagram of the structure of the limiting block and the limiting groove in this invention;

[0034] Figure 9 This is a schematic diagram of the installation structure of the grinding head in this invention.

[0035] In the picture:

[0036] 1. Housing;

[0037] 11. Collection channel;

[0038] 2. Grinding components;

[0039] 211. Grinding head;

[0040] 2111, Flange;

[0041] 212. Mounting plate;

[0042] 2121. Circular main body;

[0043] 21211, Hollowed-out;

[0044] 2122. Strip-shaped support section;

[0045] 2123. Mandrel;

[0046] 21231, bump;

[0047] 212311, Inner guide slope;

[0048] 212312, Inner Guide Plane;

[0049] 213. Mounting frame;

[0050] 221. Limiting ring;

[0051] 222. Inner guide sleeve;

[0052] 2221. Guide ridge;

[0053] 223. Outer guide sleeve;

[0054] 2231. Guide groove;

[0055] 2232. Bottom wall of the outer guide sleeve;

[0056] 224. Spring;

[0057] 2241. Fixing plate;

[0058] 225. Connecting block;

[0059] 226. Limit block;

[0060] 2262. External guide plane;

[0061] 2261. External guide ramp;

[0062] 227. Elastic membrane;

[0063] 3. Drive unit;

[0064] 31. Extended shaft;

[0065] 4. Slurry discharge pipe;

[0066] 41. Suction end;

[0067] 411. Secondary suction port Detailed Implementation

[0068] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0069] See attached document Figure 1-9 A well-drilling and agitating device with a well wall grinding component includes a housing 1, a drive unit 3 (e.g., a power head, a servo motor) installed inside the housing 1, and the output end of the drive unit 3 extends out of the housing 1 and is detachably fitted with a grinding component 2.

[0070] The grinding assembly 2 includes a grinding block, a mounting plate 212, an inner guide sleeve 222, an outer guide sleeve 223, an elastic membrane 227, and a spring 224. The grinding block is mounted on the mounting plate 212. A mandrel 2123 extends downward from the bottom center of the mounting plate 212. The mandrel 2123 is coaxially inserted into the inner guide sleeve 222. The inner guide sleeve 222 and the mandrel 2123 are encapsulated by an annular elastic membrane 227. The elastic membrane 227 specifically connects the top of the inner guide sleeve 222 and the top of the mandrel 2123. The inner guide sleeve 222 is inserted into the outer guide sleeve 223. The outer guide sleeve 223 and the inner guide sleeve 222 are limited and engaged by a first limiting structure. The first limiting structure is used to restrict the swinging of the inner guide sleeve 222. The outer guide sleeve 223 and the spindle 2123 are limited by a second limiting structure, which is used to limit the extension distance of the spindle 2123. Four springs 224 are installed in the outer guide sleeve 223 and arranged around the spindle 2123. Fixing plates 2241 are respectively installed at both ends of the springs 224. The upper fixing plate 2241 is attached to the bottom wall 2232 of the outer guide sleeve and locked by bolts. The lower fixing plate 2241 is attached to the bottom wall of the spindle 2123 and locked by bolts (the upper end of the outer guide sleeve is open and the lower end of the bottom wall is sealed, while the upper and lower ends of the inner guide sleeve are open). The bottom of the outer guide sleeve 223 can form a downwardly extending connecting sleeve. The connecting sleeve and the output shaft of the drive unit 3 (specifically, the extended shaft 31 installed at the end of the output shaft) are threaded together and locked with screws.

[0071] In this embodiment, the first limiting structure includes a guide groove 2231 disposed on the inner wall of the outer guide sleeve 223 and a guide protrusion 2221 disposed on the outer wall of the inner guide sleeve 222. There are two or more guide grooves 2231 and guide protrusions 2221, which are circumferentially distributed around the outer guide sleeve 223 and the inner guide sleeve 222. The guide protrusions 2221 and the guide grooves 2231 slide and guide each other vertically.

[0072] In this embodiment, the second limiting structure includes a limiting block 226 disposed on the upper part of the outer guide sleeve 223 and a limiting groove disposed on the outer wall of the mandrel 2123. Three limiting blocks 226 and limiting grooves are provided and are circumferentially distributed around the outer guide sleeve 223 and the mandrel 2123. The limiting blocks 226 and limiting grooves slide and guide each other vertically. Each of the three limiting blocks 226 is fixed to a limiting ring 221 by an independent connecting block 225. The limiting ring 221 is detachably and coaxially mounted to the top of the outer guide sleeve 223 by bolts, facilitating quick installation of the limiting blocks 226. Additionally, a corrugated compression sealing sleeve (not shown in the figure) can be installed between the limiting ring 221 and the inner guide sleeve 222. The sealing sleeve cooperates with the elastic membrane 227 to reduce the entry of mud into the inner guide sleeve 222 during grinding, thus reducing the impact on the sliding effect of the inner guide sleeve 222 and the extension and contraction effect of the spring 224.

[0073] See attached document Figure 7 , 8 The outer wall of the mandrel 2123 protrudes outward to form a protrusion 21231. A limiting groove is formed on the protrusion 21231. The limiting groove has an opening at the upper end and an opening on the side facing the limiting block 226. The limiting groove includes an upper movable guide groove and a lower limiting through groove. The movable guide groove and the limiting through groove are interconnected. The three side walls of the movable guide groove are inclined inner guide slopes 212311. The lower end of each side wall of the limiting block 226 is provided with an outer guide slope 2261 that cooperates with the inner guide slope 212311. The setting of the inner guide slope 212311 enables the movable guide groove to have a gradually narrowing flared structure from the outside to the inside. There is a gap between the limiting block 226 and each side wall of the movable guide groove, allowing the mandrel 2123 to swing at a certain angle. The three sidewalls of the limiting groove are vertical inner guide planes 212312, and the upper ends of the three sidewalls of the limiting block 226 are respectively provided with outer guide planes 2262 that cooperate with the inner guide planes 212312. Under the action of the four springs 224, the grinding head 211 is always in contact with the well wall. During the grinding of the well wall, the mandrel 2123 continues to extend, that is, the limiting block 226 moves downward relative to the limiting groove. The outer guide slope 2261 and the inner guide slope 212311 facilitate the guidance of the limiting block 226 into the limiting channel through the movable guide groove. The bottom wall of the limiting groove serves as a positioning reference surface and mates with the bottom wall of the limiting block 226. When the bottom wall of each limiting block 226 is in contact with the bottom wall of the limiting groove, the final extension position of the mandrel 2123, that is, the position of the grinding head 211, is limited. On the one hand, this prevents over-grinding, and on the other hand, it also restricts the mandrel 2123, making the mandrel 2123 and the outer guide sleeve 223 coaxial, eliminating the swing angle of the mandrel 2123, and making each grinding head 211 parallel to the well wall, thus ensuring the final grinding effect.

[0074] In this embodiment, the mounting plate 212 includes a circular main body 2121 and a strip-shaped support portion 2122 extending outward from the circular main body. The grinding block is mounted on the circular main body 2121 and extends outward along the strip-shaped support portion 2122. Specifically, a mounting frame 213 is mounted on the mounting plate 212. The bottom of the grinding block is mounted in the mounting frame 213 and extends outward to form a flange 2111. A clamp connected by bolts presses the flange 2111 into the mounting frame 213. This configuration enables rapid positioning and installation of large modules.

[0075] In this embodiment, a slurry discharge pipe 4 is provided inside the housing 1. The suction end 41 of the slurry discharge pipe 4 penetrates the housing 1 and is located on the same side of the housing 1 as the grinding assembly 2. On this side, the housing 1 is equipped with a suction cover (the output end of the drive unit passes through the suction cover and connects to the grinding assembly 2, i.e., the suction cover covers the grinding assembly 2). The middle part of the suction cover is recessed to form a collecting groove 11. A suction connecting pipe coaxially connected to the suction end of the slurry discharge pipe is installed at the bottom of the collecting groove. The end of the suction pipe has a main suction port (i.e., the opening of the suction pipe itself is the main suction port), and its side wall has a secondary suction hole 411. In addition, the circular main body 2121 has a hollow 21211 between adjacent strip support parts 2122. The arrangement of the collecting groove 11, the secondary suction hole 411, the strip support parts 2122 and the hollow 21211 can facilitate the rapid discharge of the slurry formed during the grinding process and reduce the wear of solid particles in the slurry on the well wall.

[0076] In some embodiments, the thruster installed at the rear of the housing 1 (i.e., the side opposite to the grinding assembly 2) is equivalent to a horizontal thruster, and a vertical thruster can also be installed at the bottom of the housing 1 to adapt to the grinding needs of different height areas of the well wall.

[0077] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0078] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A well-drilling and agitating device for preparing well wall grinding components, comprising a housing, a drive unit installed inside the housing, the output end of the drive unit extending out of the housing and detachably mounted with grinding components, characterized in that: The grinding assembly includes a grinding block, a mounting plate, an inner guide sleeve, an outer guide sleeve, an elastic membrane, and springs. The grinding block is mounted on the mounting plate, and a mandrel extends downward from the bottom center of the mounting plate. The mandrel is coaxially inserted into the inner guide sleeve, and the inner guide sleeve and the mandrel are encapsulated by an annular elastic membrane. The inner guide sleeve is inserted into the outer guide sleeve, and the outer guide sleeve and the inner guide sleeve are limited by a first limiting structure, which restricts the swinging of the inner guide sleeve. The outer guide sleeve and the mandrel are limited by a second limiting structure, which restricts the extension distance of the mandrel. Several springs are installed in the outer guide sleeve, and the two ends of the springs abut against the bottom wall of the outer guide sleeve and the bottom wall of the mandrel, respectively. The first limiting structure includes a guide groove disposed on the inner wall of the outer guide sleeve and a guide protrusion disposed on the outer wall of the inner guide sleeve. There are two or more guide grooves and guide protrusions, which are distributed circumferentially around the outer guide sleeve and the inner guide sleeve. The guide protrusions and guide grooves slide and guide each other vertically. The second limiting structure includes a limiting block disposed on the upper part of the outer guide sleeve and a limiting groove disposed on the outer wall of the mandrel. There are two or more limiting blocks and limiting grooves, which are distributed circumferentially around the outer guide sleeve and the mandrel. The limiting blocks and limiting grooves slide and guide each other vertically.

2. The well wall grinding assembly of the well agitator as described in claim 1, characterized in that: Each side wall of the limiting groove is provided with an inner guide slope at its upper end, and each side wall of the limiting block is provided with an outer guide slope that cooperates with the inner guide slope at its lower end.

3. The well wall grinding assembly of the well agitation and suction equipment as described in claim 2, characterized in that: The bottom wall of the limiting groove serves as a positioning reference surface and mates with the bottom wall of the limiting block.

4. The well wall grinding assembly of the well agitator as described in claim 1, characterized in that: The mounting plate includes a circular main body and a strip-shaped support extending outward from the circular main body. The grinding block is mounted on the circular main body and extends outward along the strip-shaped support.

5. The well wall grinding assembly of the well agitation and suction equipment as described in claim 4, characterized in that: The mounting plate is equipped with a mounting frame. The bottom of the grinding block is mounted in the mounting frame and extends outward to form a flange. The flange is pressed into the mounting frame by a clamp connected by bolts.

6. The well wall grinding assembly of the well agitation and suction equipment as described in claim 5, characterized in that: The circular main body has a hollowed-out section between adjacent strip-shaped support parts.

7. The well wall grinding assembly of the well agitator as described in claim 1, characterized in that: The machine housing is equipped with a slurry discharge pipe, and the suction end of the slurry discharge pipe penetrates the machine housing and is located on the same side of the machine housing as the grinding assembly.

8. The well wall grinding assembly of the well agitator as described in claim 7, characterized in that: The housing is equipped with a suction cover on one side of the grinding assembly. The suction cover has a concave groove. A suction pipe is installed at the bottom of the groove and is coaxially connected to the suction end pipe. The end of the suction pipe has a main suction port and its side wall has a secondary suction hole.

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