A simple drainage device for the inner wall of the retaining pipe during bedrock marker construction

Abstract

This utility model relates to the field of geological exploration technology, specifically to a simple drainage device for the inner wall of a retaining pipe during bedrock marker construction. It includes an open tank, a horizontal support rod on the open tank, four through slots circumferentially located at the bottom of the open tank, a central support rod coaxially fixed inside the open tank, a sleeve slidably fitted onto the outside of the central support rod, a limiting part at the top of the central support rod, and a steel cable positioned between the limiting part and the outside of the borehole to release the limiting position of the sleeve. This utility model uses the central support rod, sleeve, tension spring, pull rod, connecting rod, and a folding part hinged between two connected connecting rods to assemble into an umbrella-shaped expansion and contraction component. This allows the waterproof cloth and the open tank to remain in a contracted state as they move down within the borehole, increasing the cross-sectional area of ​​the passage for soil and gravel within the open tank and reducing the resistance to soil and gravel passing through the open tank. This improves the passageability of soil and gravel and solves the problem of soil and gravel clumping and hardening due to high resistance, leading to blockages.

Description

Technical Field

[0001] This utility model relates to the field of geological exploration technology, and in particular to a simple drainage device for the inner wall pipe during the construction of bedrock markers. Background Technology

[0002] Bedrock benchmark construction involves building leveling observation facilities (benchmarks) on stable bedrock to accurately detect ground settlement. The process involves drilling at selected locations until stable bedrock is reached, then drilling to a further depth. A retaining pipe is then installed inside the borehole to reinforce the inner wall and prevent excessive water seepage from the coating. After the retaining pipe is installed, the mixture of water, soil, and gravel in the borehole needs to be drained. Due to the depth of the borehole, the limited pump head, and the small diameter of the retaining pipe, drainage from the borehole becomes challenging.

[0003] To address the aforementioned technical problems, existing patent application number 202220158461.1 discloses a simple drainage device for the inner wall pipe during grouting and bedrock marker construction in goaf areas. This device, by utilizing on-site drilling rigs and drainage devices, can, to a certain extent, ensure the drainage of the material inside the wall pipe, solving the problem of inconvenient drainage due to deep boreholes and low pump head. In the aforementioned prior art, because drilling operations pass through different geological structural layers, the water in the borehole may contain impurities such as mud and stones. When the main body of the drainage device is lowered, under pressure, the stones and mud easily clump together and block the water collection channel, requiring multiple removals and clearings before further lowering, which has a relatively large impact on the drainage efficiency of the borehole. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a simple drainage device for the inner wall pipe during bedrock marker construction, so as to solve the problem that under pressure, the stones and soil are prone to clump together and block the water collection channel, requiring multiple removals and unblocking before further drilling, which has a relatively large impact on the drainage efficiency of the borehole.

[0005] To achieve the above objectives, this utility model provides a simple drainage device for the inner wall pipe during bedrock marker construction, comprising an open tank, a horizontal support rod on the open tank, and four through slots circumferentially located at the bottom of the open tank.

[0006] The central support is coaxially fixed inside the open tank, and a sleeve is slidably fitted on its exterior.

[0007] A limiting part is provided at the top of the central support column.

[0008] A steel cable is placed between the limiting part and the outside of the borehole to release the limiting position of the sleeve.

[0009] A tension spring is installed between the bottom of the central support and the bottom of the sleeve.

[0010] At least three connecting rods are circumferentially located at the bottom of the central support.

[0011] A folding section located between two adjacent connecting rods.

[0012] Waterproof fabric placed between the folds.

[0013] A tie rod hinged between the connecting rod and the outside of the sleeve.

[0014] When the device moves down, the connecting rod, folding part and waterproof cloth radially retract to reduce resistance. After it reaches the bottom, the steel cable is pulled to release the limit, so that the folding part radially unfolds and seals the bottom of the open tank.

[0015] Preferably, the groove is fan-shaped, and the radial width of the groove is greater than the outer diameter of the connecting rod in its retracted state.

[0016] Preferably, the waterproof fabric is a circular rubber mold, and the edge of the waterproof fabric wraps around the boundary of the fold from the outside in.

[0017] Preferably, the crossbar is located at the top inside the open tank, and the crossbar is detachably installed between the drilling machine output end and the open tank.

[0018] Preferably, the limiting part includes a side through hole that radially penetrates the top of the central support column and a hollow cavity coaxially disposed inside the top of the central support column. A wedge-shaped insert is slidably disposed inside the side through hole. An elastic connector is provided between the two wedge-shaped inserts and the bottom of the steel cable. The elastic connector is used to drive the two wedge-shaped inserts to move closer to each other when the steel cable is pulled up.

[0019] Preferably, one end of the bottom of the wedge-shaped insert is an inclined surface, and the inclined surfaces on the two wedge-shaped inserts are far apart from each other.

[0020] Preferably, the two ends of the wedge-shaped insert are located inside the side perforation and outside the central support, respectively, and the length of the bottom of the wedge-shaped insert is less than the length of its top.

[0021] Preferably, the interior of the side perforation is connected to the bottom end of the hollow cavity, and the distance between the side perforation and the bottom end of the tension spring is less than the elastic extension change of the tension spring.

[0022] The beneficial effects of this utility model are:

[0023] This invention utilizes a central support column, sleeve, tension spring, pull rod, connecting rod, and a folding part hinged between two connected connecting rods to assemble an umbrella-shaped unfolding component. This allows the waterproof cloth and open container to remain folded as they descend within the borehole, increasing the cross-sectional area of ​​the passage for soil and gravel within the open container and reducing the resistance to their passage. This improves the passageability of soil and gravel, solving the problem of soil and gravel clumping and hardening due to high resistance, thus preventing blockages. Furthermore, after the open container reaches the bottom, pulling the steel cable releases the limiting part from the sleeve, causing the sleeve to be pulled downwards by the tension spring. This allows the umbrella-shaped unfolding component to fully unfold, laying the waterproof cloth flat at the bottom of the open container, sealing the bottom and improving the efficiency of removing water, soil, gravel, and other impurities from the borehole. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional illustration of the present invention. Figure 1 ;

[0026] Figure 2 This is a three-dimensional illustration of the present invention. Figure 2 ;

[0027] Figure 3 This is a three-dimensional illustration of the present invention. Figure 3 ;

[0028] Figure 4 This is a three-dimensional illustration of the present invention. Figure 4 ;

[0029] Figure 5 This is a three-dimensional illustration of the present invention. Figure 5 ;

[0030] Figure 6 This is a three-dimensional illustration of the present invention. Figure 6 ;

[0031] Figure 7 for Figure 6 An enlarged schematic diagram of part A in the middle.

[0032] The diagram is marked as follows:

[0033] 1. Open tank; 2. Through groove; 3. Horizontal support rod; 4. Central support column; 5. Limiting part; 51. Hollow cavity; 52. Side through hole; 53. Wedge-shaped insert; 54. Elastic connector; 541. Limiting block; 542. Compression spring; 543. Inner groove; 544. Connecting block; 545. Sliding block; 546. Inclined slide; 6. Steel cable; 7. Connecting rod; 8. Pull rod; 9. Folding part; 91. Connecting shaft; 92. Fan-shaped plate; 10. Sleeve; 11. Waterproof cloth; 12. Tension spring. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0035] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0036] like Figures 1 to 7 As shown, a simple drainage device for the retaining pipe in bedrock construction includes an open tank 1, a horizontal support rod 3 on the open tank 1, and four through slots 2 circumferentially located at the bottom of the open tank 1. The outer diameter of the open tank 1 matches the inner diameter of the borehole.

[0037] The central support 4 is coaxially fixed inside the open tank 1, and a sleeve 10 is slidably fitted on its outside.

[0038] A limiting part 5 is provided at the top of the central support 4.

[0039] The steel cable 6 is located between the limiting part 5 and the outside of the borehole, and is used to release the limiting position of the sleeve 10.

[0040] A tension spring 12 is installed between the bottom end of the central support 4 and the bottom of the sleeve 10.

[0041] At least three connecting rods 7 are circumferentially located at the bottom of the central support 4.

[0042] A folding part 9 is provided between two adjacent connecting rods 7. The folding part 9 includes a sector plate 92 that is respectively hinged to the two adjacent connecting rods 7 and a connecting shaft 91 that is hinged between the two sector plates 92. This design allows the connecting shaft 91 to retract as a whole when the free end of the connecting rod 7 deflects upward and retracts. At the same time, it creates a relative displacement between the connecting shaft 91 and the connecting rod 7, that is, the connecting shaft 91 and the connecting rod 7 move away from each other in the radial direction. However, both of them actually retract towards the central support 4.

[0043] Waterproof fabric 11 is provided between the folds 9.

[0044] A pull rod 8 is hinged between the connecting rod 7 and the outside of the sleeve 10.

[0045] When the device moves downward, the connecting rod 7, the folding part 9, and the waterproof cloth 11 radially retract to reduce resistance. After reaching the bottom, the steel cable 6 is pulled to release the limit, causing the folding part 9 to radially unfold and seal the bottom of the open tank 1. By pulling up the sleeve 10, it causes the pull rod 8 to deflect, causing the hinge point between the pull rod 8 and the connecting rod 7 to move upward and closer to the outside of the central support 4. At the same time, the free end of the connecting rod 7 is pulled upward and deflected towards the central support 4 until the sleeve 10 is pulled up to the top of the limit part 5. This achieves the radial retraction of the folding part 9 and the waterproof cloth 11, reducing the radial obstruction area of ​​the folding part 9 and the waterproof cloth 11. This allows mud and gravel to pass through the inside of the channel 2 and the open tank 1 efficiently, avoiding hardening and clumping due to the large obstruction force during passage, which could lead to blockage.

[0046] like Figures 2 to 4 As shown, the groove 2 is fan-shaped, and the radial width of the groove 2 is greater than the outer diameter of the connecting rod 7 in the retracted state. This design can minimize the passage of mud and gravel through the groove 2 and the open tank 1 in sequence, reduce the resistance and obstruction in this process, and thus avoid the problem of blockage inside the groove 2 and the open tank 1.

[0047] like Figure 4 As shown, the waterproof cloth 11 is a circular rubber mold, and the edge of the waterproof cloth 11 wraps around the boundary of the folded part 9 from the outside to the inside. This design allows the waterproof cloth 11 to have good elasticity and extensibility when the folded part 9 is folded or unfolded. At the same time, pressure can be applied to it to improve the tightness of its fit with the bottom of the open can 1, thereby increasing the sealing effect.

[0048] like Figure 1 and Figure 3As shown, the horizontal support rod 3 is located at the top inside the open tank 1, and the horizontal support rod 3 is detachably installed between the output end of the drilling machine and the open tank 1. This design allows the drilling machine's downward pressure to be used on-site to push the open tank 1 down, providing sufficient downward pressure and ensuring that the difference between the mud pressure in the trench 2 and the mud pressure at the bottom of the open tank 1 remains relatively small. This greatly reduces the likelihood of mud and gravel agglomerating and solidifying in the trench 2, thus blocking its interior and improving the passage of mud and gravel between the trench 2 and the open tank 1.

[0049] like Figures 5 to 7 As shown, the limiting part 5 includes a side through hole 52 that radially penetrates the top of the central support column 4 and a hollow cavity 51 coaxially disposed inside the top of the central support column 4. A wedge-shaped insert 53 is slidably disposed inside the side through hole 52. One end of the bottom of the wedge-shaped insert 53 is an inclined surface, and the inclined surfaces on the two wedge-shaped inserts 53 are far apart from each other. The two ends of the wedge-shaped insert 53 are located inside the side through hole 52 and outside the central support column 4, respectively. The length of the bottom of the wedge-shaped insert 53 is less than the length of its top. An elastic connector 54 is provided between the two wedge-shaped inserts 53 and the bottom of the steel cable 6. The elastic connector 54 is used to drive the two wedge-shaped inserts 53 to move closer to each other when the steel cable 6 is pulled up.

[0050] The elastic connector 54 includes an inner groove 543 on the opposing surfaces of the two wedge-shaped inserts 53 and an inclined slide groove 546 connecting the inside of the inner groove 543 and the outside of the wedge-shaped inserts 53. The bottom end of the inclined slide groove 546 is close to the outside of the central support 4, and its top end is away from the outside of the central support 4. A slider 545 is slidably provided inside the inclined slide groove 546. The bottom end of the steel cable 6 is inserted into the hollow cavity 51, and a connecting block 544 is fixedly provided at the bottom of the steel cable 6. The top of the limiting block 541 and the top of the inside of the hollow cavity 51 are connected. A compression spring 542 is provided, and one end of the limiting block 541 is fixed on the connecting block 544. Before pushing the open can 1 down, the sleeve 10 is moved to the top of the wedge-shaped insert 53, so that the wedge-shaped insert 53 limits and fixes the sleeve 10. When it is necessary to release the limiting and fixing effect of the wedge-shaped insert 53 on the sleeve 10, it is only necessary to pull the steel cable 6 up, which can drive the two wedge-shaped inserts 53 to move closer to each other and retract into the hollow cavity 51, thereby releasing the limiting and fixing effect of the sleeve 10, so that the folded part 9 and the waterproof cloth 11 are laid out radially.

[0051] like Figures 5 to 7As shown, the interior of the side perforation 52 is connected to the bottom end of the hollow cavity 51, and the distance between the side perforation 52 and the bottom end of the tension spring 12 is less than the elastic extension change of the tension spring 12. The umbrella-shaped expansion and contraction part is assembled by the central support 4, sleeve 10, tension spring 12, pull rod 8, connecting rod 7 and folding part 9 hinged between the two connected connecting rods, so that the waterproof cloth and the open can remain in a contracted state when they move down in the borehole, increasing the cross-sectional size of the passage of soil and stones in the open can, reducing the resistance of soil and stones passing through the open can, improving the passage of soil and stones, and solving the problem of soil and stones clumping and hardening and causing blockage due to the large resistance of passage.

[0052] Working principle: Before pushing the open tank 1 down at the output end of the drilling machine, the sleeve 10 is moved to the top of the wedge-shaped insert 53, causing the wedge-shaped insert 53 to first contract and then expand outward, thus limiting and fixing the sleeve 10. This allows the connecting rod 7, pull rod 8, and folding part 9 to fold and retract from the outside of the central support 4, facilitating the simultaneous retraction of structures such as the waterproof cloth 11 to a minimum state. Then, under the downward thrust of the drilling machine output end, the open tank 1 is pushed down, allowing the mud and gravel to flow from the bottom up through the groove 2 and the inside of the open tank 1. This reduces the pressure difference between the mud and gravel inside the open tank 1 and the pressure at the top of the open tank 1, as well as the resistance of the waterproof cloth 11 to the mud and gravel, allowing the mud to flow more smoothly. The slurry and gravel will not harden and clump together due to the large pressure difference inside the open tank 1, causing blockage problems. When the open tank 1 falls to the bottom of the borehole, the steel cable 6 is pulled up, causing it to move closer to each other and retract into the side perforation 52 through the elastic connector 54. This releases the limit of the sleeve 10 by the limiting part 5, allowing the tension spring 12 to pull the sleeve 10 down to reset. During this process, the lowered sleeve 10, through the linkage of the pull rod 8, causes the connecting rod 7 and the folding part 9 to unfold radially and seal the bottom of the open tank 1, preventing the slurry and gravel from leaking from the bottom of the open tank 1. This allows the output end of the drilling machine to pull the open tank 1 up and discharge the slurry, gravel, and water.

[0053] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0054] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A simple drainage device for the inner wall of a retaining pipe during bedrock marker construction, comprising an open tank (1), a horizontal support rod (3) mounted on the open tank (1), and four through slots (2) circumferentially located at the bottom of the open tank (1), characterized in that: The central support (4) is coaxially fixed inside the open tank (1), and a sleeve (10) is slidably fitted on its outside; A limiting part (5) is provided at the top of the central support (4); A steel cable (6) is provided between the limiting part (5) and the outside of the borehole to release the limiting of the sleeve (10); A tension spring (12) is installed between the bottom end of the central support (4) and the bottom of the sleeve (10); At least three connecting rods (7) are circumferentially located at the bottom of the central support (4); A fold (9) is provided between two adjacent connecting rods (7); Waterproof fabric (11) is provided between the folds (9); A tie rod (8) is hinged between the connecting rod (7) and the outside of the sleeve (10); When the device moves down, the connecting rod (7), the folding part (9) and the waterproof cloth (11) are radially retracted to reduce resistance. After it reaches the bottom, the steel cable (6) is pulled to release the limit, so that the folding part (9) is radially unfolded and seals the bottom of the open tank (1).

2. The simple drainage device for the retaining pipe during bedrock marker construction according to claim 1, characterized in that, The groove (2) is fan-shaped, and the radial width of the groove (2) is greater than the outer diameter of the connecting rod (7) in its retracted state.

3. The simple drainage device for the retaining pipe during bedrock marker construction according to claim 1, characterized in that, The waterproof cloth (11) is a circular rubber mold, and the edge of the waterproof cloth (11) wraps around the boundary of the fold (9) from the outside to the inside.

4. The simple drainage device for the retaining pipe during bedrock marker construction according to claim 1, characterized in that, The horizontal support rod (3) is located at the top inside the open tank (1), and the horizontal support rod (3) is detachably installed between the output end of the drilling machine and the open tank (1).

5. The simple drainage device for the retaining pipe during bedrock marker construction according to claim 1, characterized in that, The limiting part (5) includes a side through hole (52) that radially penetrates the top of the central support (4) and a hollow cavity (51) coaxially disposed at the top of the central support (4). A wedge-shaped insert (53) is slidably disposed inside the side through hole (52). An elastic connector (54) is provided between the two wedge-shaped inserts (53) and the bottom of the steel cable (6). The elastic connector (54) is used to drive the two wedge-shaped inserts (53) to move closer to each other when the steel cable (6) is pulled up.

6. The simple drainage device for the retaining pipe during bedrock marker construction according to claim 5, characterized in that, One end of the bottom of the wedge-shaped insert (53) is an inclined surface, and the inclined surfaces on the two wedge-shaped inserts (53) are far apart from each other.

7. The simple drainage device for the retaining pipe during bedrock marker construction according to claim 6, characterized in that, The two ends of the wedge-shaped insert (53) are located inside the side perforation (52) and outside the central support (4), respectively, and the length of the bottom of the wedge-shaped insert (53) is less than the length of its top.

8. The simple drainage device for the retaining pipe during bedrock marker construction according to claim 5, characterized in that, The interior of the side perforation (52) is connected to the bottom end of the hollow cavity (51), and the distance between the side perforation (52) and the bottom end of the tension spring (12) is less than the elastic extension change of the tension spring (12).

Images