A steel casing follow-up positioning and guiding device for a karst goaf

Abstract

The present invention discloses a steel casing follow-up positioning and guiding device for a karst goaf, which includes a guiding bracket; a hoisting mechanism arranged on the guiding bracket for hoisting the steel casing; a plurality of guiding structures spaced along the height direction of the guiding bracket; the guiding structure includes a first guiding rod and a second guiding rod distributed in a V shape, a guiding groove is formed at an interval between the first guiding rod and the second guiding rod, a steel casing pushing member is arranged on the opening side of the guiding groove, and an inner pushing mechanism for pushing the steel casing pushing member to move into the guiding groove. Aiming at the technical problem that the existing method of following and lowering the steel casing has great construction difficulty, the present invention provides a steel casing follow-up positioning and guiding device for a karst goaf, which can effectively realize the alignment of the upper and lower two steel casings through a plurality of guiding structures, so as to facilitate subsequent full-weld fixing processing, and improve the welding efficiency and accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of steel casing construction in karst goaf areas, and particularly relates to a follow-up positioning and guiding device for steel casings in karst goaf areas. Background Art

[0002] Underground rocks in karst goaf areas are severely affected by tectonics, distorted and squeezed violently, and their distribution is extremely complex without any regularity. They are characterized by the interbedding and interleaving of soft and hard rocks, overlapping and interpenetrating, uneven weathering, hard in soft, and soft in hard. To ensure construction safety and construction period, the pile foundation construction adopts the method of following up the steel casing.

[0003] Refer to Figure 1 , the existing methods for following up and lowering the steel casing mostly set up a steel frame structure and use an electric hoist to realize the hoisting and lowering into the drilling hole. After hoisting and lowering a certain distance, another section of the steel casing is hoisted and lowered by a crane, so that the upper and lower two steel casings are butted up and fixed by welding. However, since it is difficult to achieve alignment by using an electric hoist and a crane, and the steel casing is relatively heavy, it is also difficult to adjust manually, resulting in a relatively cumbersome welding form. Summary of the Invention

[0004] 1. Technical Problems to be Solved by the Invention

[0005] Aiming at the technical problem that the existing method for following up and lowering the steel casing has a relatively large construction difficulty, the present invention provides a follow-up positioning and guiding device for steel casings in karst goaf areas, which can effectively realize the alignment of the upper and lower two steel casings through multiple guiding structures, so as to facilitate subsequent full-weld fixing and processing, and improve the welding efficiency and accuracy.

[0006] 2. Technical Solutions

[0007] To solve the above problems, the technical solution provided by the present invention is as follows:

[0008] A follow-up positioning and guiding device for steel casings in karst goaf areas, comprising a guiding support; a hoisting mechanism arranged on the guiding support for hoisting the steel casing; a plurality of guiding structures spaced along the height direction of the guiding support; the guiding structure includes a first guiding rod and a second guiding rod distributed in a V shape, a guiding groove is formed between the first guiding rod and the second guiding rod at intervals, a steel casing pusher is arranged on the opening side of the guiding groove, and an inner pushing mechanism for pushing the steel casing pusher into the guiding groove.

[0009] Optionally, it further includes a first adjusting structure for adjusting the distance between the first guiding rod and the second guiding rod and the opening direction of the guiding groove.

[0010] Optionally, the guiding bracket is provided with a mounting seat for mounting the first guiding rod and the second guiding rod. One end of the first guiding rod and the second guiding rod, which is far away from the opening side of the guiding groove, is rotatably connected to the mounting seat. The first adjusting structure is used to adjust the rotation angles of the first guiding rod and the second guiding rod on the mounting seat.

[0011] Optionally, the first adjusting structure includes a plurality of adjusting protrusions arranged on the mounting seat and distributed along the rotation directions of the first guiding rod and the second guiding rod. Fixed grooves are formed at intervals between adjacent two of the adjusting protrusions.

[0012] Optionally, guide rod sleeves that can rotate relative to each other are sleeved on both the first guiding rod and the second guiding rod.

[0013] Optionally, the inner pushing mechanism includes an oil cylinder installed on the guiding bracket, and the steel casing pushing member is installed at the end of the output shaft of the oil cylinder.

[0014] Optionally, an installation frame for installing the steel casing pushing member is fixedly connected to the end of the oil cylinder, and the steel casing pushing member is rotatably installed on the installation frame horizontally.

[0015] Optionally, the guiding bracket is formed by splicing a plurality of columns and cross beams, and further includes a plurality of support frames for installing the guiding structure.

[0016] Optionally, the hoisting mechanism includes a plurality of electric hoists arranged on the guiding bracket, and a steel lifting rope for connecting the electric hoists and the steel casing.

[0017] 3. Beneficial effects

[0018] Adopting the technical solution provided by the present invention, compared with the prior art, it has the following beneficial effects:

[0019] The steel casing following positioning and guiding device for karst mined-out areas of the present invention has a reasonable structure, can effectively realize the horizontal limit of the steel casing during the hoisting process, uses the guiding structure to form a triangular frame structure to realize the inscribed positioning of the steel casing, and can effectively realize the alignment of the upper and lower two steel casings through multiple guiding structures, so as to facilitate subsequent full-welding and fixing processing, improving the welding efficiency and accuracy. Description of the drawings

[0020] Figure 1 is a schematic structural diagram of the existing method for following and lowering the steel casing proposed in the background technology of the present invention;

[0021] Figure 2 is a schematic structural diagram of a steel casing following positioning and guiding device for karst mined-out areas proposed in an embodiment of the present invention;

[0022] Figure 3 The upper view of the guiding structure in a steel casing following positioning and guiding device for a karst goaf according to an embodiment of the present invention;

[0023] Figure 4 The side view of the guiding structure in a steel casing following positioning and guiding device for a karst goaf according to an embodiment of the present invention;

[0024] 1. Guiding bracket; 3. Guiding structure; 3a. Guiding groove; 4. First guiding rod; 5. Second guiding rod; 6. Steel casing pusher; 7. Mounting seat; 8. Adjusting protrusion; 9. Guide rod sleeve; 10. Oil cylinder; 11. Mounting frame; 12. Support frame; 13. Electric hoist; 14. Steel lifting rope. Detailed implementation manners

[0025] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners. It should be understood that the specific implementation manners described herein are only used to explain the present invention and do not limit the protection scope of the present invention.

[0026] It should be noted that when an element is referred to as "fixed to", "arranged on", "fixedly arranged on" or "mounted on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. Further, when an element is considered to be "fixedly connected" to another element, the two can be fixed in a detachable connection manner or a non-detachable connection manner, such as socket connection, snap connection, integrally formed fixation, welding, etc., which can be realized in the prior art and will not be elaborated herein. When an element is perpendicular or approximately perpendicular to another element, it means that the ideal state of the two is perpendicular, but due to manufacturing and assembly effects, there may be a certain vertical error. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific implementation manners and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0028] The "first" and "second" involved in the present invention do not represent specific quantities and orders, but are only used for name distinction.

[0029] Combined with the attached Figures 2-4, A steel casing follow-up positioning and guiding device for a karst goaf in this embodiment includes a guiding bracket 1. The guiding bracket 1 is assembled by splicing several columns and crossbeams. Several columns are arranged around the outside of the drilling hole. The bottom of the columns is supported and fixed by pouring a concrete foundation, and the columns and the concrete foundation are reinforced by welding inclined beams. The crossbeam is arranged on the top of the columns, and both ends of the crossbeam are fixedly connected to the adjacent columns by bolts; a hoisting mechanism is arranged on the guiding bracket 1 for hoisting the steel casing. The hoisting mechanism includes several electric hoists 13 arranged on the guiding bracket 1 and a steel lifting rope 14 for connecting the electric hoist 13 and the steel casing. Each crossbeam is fixedly hung and installed with an electric hoist 13. The electric hoist 13 hoists the steel casing through its steel lifting rope 14. By setting the hoisting points around the top and bottom of the steel casing, the electric hoist 13 and the steel lifting rope 14 are used to lift and lower the steel casing. At the same time, when the lower steel casing is lowered a certain distance, another section of the steel casing is hoisted by a crane to a position above the steel casing steel support structure, and the upper and lower ports of this section of the steel casing are butt-jointed with the lower steel casing in a butt-welding form and fixed. Subsequently, the continuous lowering of the steel casing in the drilling hole realizes the butt-joint and progression of multiple steel casings in sequence; several guiding structures 3 are distributed at intervals along the height direction of the guiding bracket 1. There are several support frames 12 for installing the guiding structures 3 on the guiding bracket 1. Each guiding structure 3 is installed on the corresponding support frame 12. The guiding structure 3 is used to make the upper and lower ports of two steel casings face each other and butt-joint, so as to realize the subsequent welding operation. The number of the guiding structures 3 is four or more. Several guiding structures 3 are arranged at intervals up and down and face each other up and down, and are arranged inside the support frame 12; the guiding structure 3 includes a first guiding rod 4 and a second guiding rod 5 distributed in a V shape. Both the first guiding rod 4 and the second guiding rod are in the shape of a solid cylinder structure. A guiding groove 3a is formed between the first guiding rod 4 and the second guiding rod 5. The guiding groove 3a is in a V-shaped structure. A steel casing pusher 6 is arranged on the opening side of the guiding groove 3a, and an inner pushing mechanism for pushing the steel casing pusher 6 into the guiding groove 3a.

[0030] The working principle of this steel casing follow-up positioning and guiding device for a karst goaf: Since multiple guiding structures 3 are provided, one steel casing is positioned by more than two guiding structures 3. Since the inner and outer diameters of the lowered steel casing are the same, and the guiding structures 3 are all in a structure facing each other up and down, when more than two guiding structures 3 push a steel casing forward to realize inner cutting limit, and the upper steel casing also adopts this form to realize inner cutting limit, the two steel casings can obviously be aligned up and down. And the guiding structure 3 does not limit the up and down sliding of the steel casing. Therefore, slowly lowering the steel casing can well realize the butt-joint, which is convenient for subsequent full welding and fixing.

[0031] The steel casing follow-up positioning and guiding device for this karst mined-out area has a reasonable structure and can effectively achieve the horizontal limit of the steel casing during the hoisting process. By using the guiding structure 3 to form a triangular frame structure, the inscribed positioning of the steel casing is realized. Through multiple guiding structures 3, the lowering and alignment of the upper and lower steel casings can be effectively achieved, facilitating subsequent full-weld fixation processing, and improving the welding efficiency and accuracy.

[0032] As an alternative solution of the present invention, it further includes a first adjustment structure for adjusting the distance between the first guiding rod 4 and the second guiding rod 5, as well as the opening direction of the guiding groove 3a. By adjusting the distance between the first guiding rod 4 and the second guiding rod 5, mainly to adjust the depth that the steel casing can enter the guiding groove 3a, thereby realizing the position adjustment of the steel casing in one direction. The larger the distance between the first guiding rod 4 and the second guiding rod 5, the deeper the steel casing can enter the guiding groove 3a. At the same time, by adjusting the opening direction of the guiding groove 3a (during the process of adjusting the opening direction of the guiding groove 3a, it is necessary to ensure that the steel casing pusher 6 can push the steel casing into the guiding groove 3a from the opening side), it is also to realize the position adjustment of the steel casing in another direction. For example, when the distance between the first guiding rod 4 and the second guiding rod 5 is fixed, by adjusting the opening direction of the guiding groove 3a, the final fixed position of the steel sheath can be moved to the side. Through the above structural settings, the fixed position of the steel sheath can be adjusted within a certain range to ensure that the steel sheath is aligned with the drilling position, without the need to adjust the position of the guiding structure 3 to achieve the above purpose, making it more convenient to use.

[0033] As an alternative solution of the present invention, the guiding bracket 1 is provided with mounting seats 7 for mounting the first guiding rod 4 and the second guiding rod 5. The mounting seats 7 are integrally formed with the support frame 12. The mounting seats 7 are semi-circular structures, with circular holes in the middle for connecting the first guiding rod 4 and the second guiding rod 5. One end of the first guiding rod 4 and the second guiding rod 5 far from the opening side of the guiding groove 3a is rotatably connected to the mounting seats 7 and can rotate independently relative to the mounting seats 7. The first guiding rod 4 and the second guiding rod 5 are fixedly connected to the mounting seats 7 by bolts. Loosening the bolts allows the first guiding rod 4 and the second guiding rod 5 to rotate relative to the mounting seats 7. At this time, the first adjustment structure is used to adjust the rotation angles of the first guiding rod 4 and the second guiding rod 5 on the mounting seats 7. Specifically, the first adjustment structure includes a number of adjustment protrusions 8 provided on the mounting seats 7 and equally spaced along the rotation direction of the first guiding rod 4 and the second guiding rod 5. A fixing groove 8a is formed between adjacent two adjustment protrusions 8. The guiding rod is matched with the corresponding fixing groove 8a to fix its rotation angle.

[0034] As an alternative embodiment of the present invention, guide rod sleeves 9 that can rotate relative to each other are sleeved on both the first guide rod 4 and the second guide rod 5. The guide rod sleeves 9 are in the shape of a smooth-surfaced cylinder, and both the front and rear ends of the guide rod sleeves 9 are rotatably connected to the corresponding guide rods through sleeve bearings to reduce the frictional resistance when the steel casing slides up and down. If the frictional force on one side is greater than that on the other side when the steel casing slides up and down, it is likely to cause a certain degree of inclination, resulting in a greater force being borne by the electric hoist 13 on the tipping side, posing a significant safety hazard.

[0035] As an alternative embodiment of the present invention, the inner pushing mechanism includes an oil cylinder 10 installed on the guide bracket 1. Specifically, the oil cylinder 10 is installed on the support frame 12 by bolts, and the output shaft of the oil cylinder 10 faces the guide groove 3a. An installation frame 11 for installing the steel casing pusher 6 is fixedly connected to the end of the oil cylinder 10. The installation frame 11 is in a U-shaped structure, and the steel casing pusher 6 is horizontally rotatably installed on the installation frame 11 through bearings, which can not only ensure the pushing of the steel casing by the steel casing pusher 6 but also reduce the frictional resistance between the steel casing pusher 6 and the steel casing, making the steel casing slide up and down more stably.

[0036] As an alternative embodiment of the present invention, several first guide rods 4 can be fixedly connected by the same connecting rod to simultaneously adjust the rotation angles of multiple first guide rods 4. Similarly, several second guide rods 5 can also be fixedly connected by the same connecting rod to simultaneously adjust the rotation angles of multiple second guide rods 5.

[0037] The above has schematically described the present invention and its embodiments. This description is not restrictive, and what is shown in the drawings is only one of the embodiments of the present invention. The actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and, without departing from the spirit of the present invention, design similar structural forms and embodiments without creative efforts, they shall fall within the protection scope of the present invention.

Claims

1. A steel casing follow-up positioning and guiding device for a karst goaf, characterized in that: including a guiding bracket; a hoisting mechanism arranged on the guiding bracket for hoisting a steel casing; a plurality of guiding structures spaced along the height direction of the guiding bracket; the guiding structure includes a first guiding rod and a second guiding rod distributed in a V shape, a guiding groove is formed between the first guiding rod and the second guiding rod at intervals, a steel casing pushing member is arranged on the opening side of the guiding groove, and an inner pushing mechanism for pushing the steel casing pushing member to move into the guiding groove; further includes a first adjusting structure for adjusting the distance between the first guiding rod and the second guiding rod and the opening direction of the guiding groove; an installation seat for installing the first guiding rod and the second guiding rod is arranged on the guiding bracket, one ends of the first guiding rod and the second guiding rod far from the opening side of the guiding groove are rotatably connected to the installation seat, and the first adjusting structure is used for adjusting the rotation angles of the first guiding rod and the second guiding rod on the installation seat; the first adjusting structure includes a plurality of adjusting protrusions arranged on the installation seat and equally spaced along the rotation direction of the first guiding rod and the second guiding rod, and fixing grooves are formed at intervals between two adjacent adjusting protrusions; 2. The steel casing follow-up positioning and guiding device for a karst mined-out area according to claim 1, wherein: guide rod sleeves that can rotate relatively are sleeved on both the first guiding rod and the second guiding rod; 3. The steel casing following positioning and guiding device for a karst goaf according to claim 1, characterized in that: the inner pushing mechanism includes an oil cylinder installed on the guiding bracket, and the steel casing pushing member is installed at the end of the output shaft of the oil cylinder; 4. A steel casing follow-up positioning and guiding device for a karst mined-out area according to claim 3, characterized in that: an installation frame for installing the steel casing pushing member is fixedly connected to the end of the oil cylinder, and the steel casing pushing member is rotatably installed on the installation frame horizontally; 5. A steel casing follow-up positioning and guiding device for a karst goaf according to claim 1, characterized in that: the guiding bracket is spliced by a plurality of columns and cross beams, and further includes a plurality of support frames for installing the guiding structures; 6. The steel casing follow-up positioning and guiding device for a karst goaf according to claim 5, characterized in that: the hoisting mechanism includes a plurality of electric hoists arranged on the guiding bracket and steel lifting ropes for connecting the electric hoists and the steel casing.

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