A support and guide device for a rescue drilling rig casing

Abstract

The present application relates to the technical field of tunnel rescue, and particularly relates to a support and guide device for a rescue drilling machine casing pipe. The support and guide device for the rescue drilling machine casing pipe comprises a support frame assembly and at least three eccentric roller assemblies. The support frame assembly comprises a frame body with a guide hole, and the eccentric roller assemblies are arranged on the frame body at intervals around the guide hole. The eccentric roller assembly comprises a rotatable eccentric shaft and a roller. The eccentric shaft comprises a central shaft section and an eccentric shaft section. The roller is rotatably sleeved on the eccentric shaft section. The rolling surface of the roller extends into the guide hole, and the rolling surfaces of the rollers of multiple sets of eccentric roller assemblies form a tangent circle for supporting the casing pipe. The eccentric shaft is rotated with the axis of the central shaft section as the rotation axis, and the eccentric shaft drives the roller to rotate eccentrically, thereby adjusting the diameter of the tangent circle to adapt to casing pipes of different diameters. The support and guide device has a simple structure and is convenient to adjust.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel rescue, and in particular to a support and guide device for a rescue drill casing. BACKGROUND

[0002] Tunnel collapse is a common safety accident in tunnel construction, and some of the collapses will completely bury the passageway, and the trapped personnel will be trapped between the collapse body and the tunnel face. If rescue is not timely, the trapped personnel will be in danger of life and safety, and the situation is very critical. The existing rescue methods mainly include small pilot pit rescue method, pipe jacking method, large-diameter rescue drill method and the like. The large-diameter rescue drill rescue method is a relatively advanced mechanized rescue method, which quickly penetrates the collapse body to reach the trapped personnel position through the drill and special drill tools, and then the casing support device is lowered to top into a large-diameter casing as a construction passageway. However, the existing casing support and guide device can only adapt to a single diameter casing and cannot adapt to casings of different diameters. SUMMARY

[0003] (I) Technical problem to be solved

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present application provides a support and guide device for a rescue drill casing, which solves the technical problem that the existing casing support and guide device can only adapt to a single diameter casing.

[0005] (II) Technical scheme

[0006] In order to achieve the above-mentioned purpose, the main technical scheme adopted by the present application comprises:

[0007] The support and guide device for the rescue drill casing provided by the present application comprises a support frame assembly and at least three eccentric roller assemblies. The support frame assembly comprises a frame body with a guide hole, and the eccentric roller assemblies are arranged on the frame body at intervals around the guide hole. The eccentric roller assembly comprises a rotatable eccentric shaft and a roller. The eccentric shaft comprises a central shaft section and an eccentric shaft section, and the roller is rotatably sleeved on the eccentric shaft section. The rolling surface of the roller extends into the guide hole, and the rolling surfaces of the rollers of multiple eccentric roller assemblies form a tangent circle for supporting the casing. The eccentric shaft is rotated with the central shaft section as the rotation axis, driving the eccentric rotation of the roller, and thereby adjusting the diameter of the tangent circle.

[0008] Preferably, the eccentric roller assembly further comprises a fixing unit and a bearing. The fixing unit is sleeved on the central shaft section and fixes the eccentric shaft relative to the support frame assembly. The eccentric shaft section and the roller are rotationally connected through the bearing.

[0009] Preferably, the fixing unit comprises a positioning gear and an adjusting gear. The adjusting gear is sleeved on the central shaft section and fixedly connected with the eccentric shaft. The positioning gear is sleeved on the outside of the adjusting gear and engaged with the adjusting gear, and the positioning gear is fixed with the support frame assembly.

[0010] Preferably, the adjusting gear comprises a connected adjusting part and an outer engaging part; the adjusting part and the outer engaging part form an integral structure, an installation hole is formed along the axial direction of the adjusting gear, and the adjusting gear is sleeved on the central shaft section through the installation hole; the positioning gear is provided with an inner engaging part along the axial direction thereof, and the outer engaging part is engaged with the inner engaging part.

[0011] Preferably, one side of the installation hole of the adjusting gear is provided with an installation through slot along the axial direction thereof.

[0012] Preferably, the longitudinal cross section of the adjusting part is a polygon.

[0013] Preferably, the support frame assembly comprises an upper guide frame, a lower guide frame and two installation seats; the two installation seats are oppositely arranged, the upper guide frame is detachably connected above the two installation seats, and the lower guide frame is detachably connected to the side walls of the two installation seats; the upper guide frame and the lower guide frame are butted to form a guide hole.

[0014] Preferably, grooves are formed on the upper guide frame and the lower guide frame to accommodate the eccentric roller assembly.

[0015] Preferably, the eccentric roller assembly further comprises two gland nuts; the two gland nuts are respectively sleeved on the central shaft sections at the two ends of the eccentric shaft to fix the eccentric shaft in the groove.

[0016] Preferably, six groups of eccentric roller assemblies are uniformly arranged around the guide hole.

[0017] (Three) beneficial effects

[0018] The beneficial effects of the present application are:

[0019] The support and guide device for the casing of the rescue drilling machine provided by the present application comprises an eccentric roller assembly, the eccentric roller assembly comprises an eccentric shaft and a roller rotatably connected with the eccentric shaft, the rolling surface of the roller extends into the guide hole and the rolling surfaces of the plurality of rollers form a tangent circle for supporting the casing, the eccentric shaft is rotated with the axis of the central shaft section of the eccentric shaft as the rotation axis, the roller is driven to rotate eccentrically, and then the diameter of the tangent circle is adjusted to adapt to casings with different diameters, and the support and guide device is simple in structure and convenient to adjust. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic view of the support and guide device for the casing of the rescue drilling machine;

[0021] Figure 2 It is a structural schematic view of the support and guide device for the casing of the rescue drilling machine (showing the casing);

[0022] Figure 3 It is Figure 1 It is a structural schematic view of the eccentric roller assembly;

[0023] Figure 4 For Figure 3 structure diagram of the positioning gear in the middle;

[0024] Figure 5 For Figure 3 structure diagram of the positioning gear in the middle;

[0025] Figure 6 For Figure 3 structure diagram of the eccentric shaft in the middle;

[0026] Figure 7 structure diagram of the support frame assembly.

[0027]

Explanation of reference signs

[0028] 1: support frame assembly; 11: guide hole; 12: upper guide frame; 13: lower guide frame; 14: mounting seat; 15: groove;

[0029] 2: eccentric roller assembly; 21: eccentric shaft; 211: central shaft section; 212: eccentric shaft section; 22: roller; 23: fixing unit; 231: positioning gear; 2311: inner engaging part; 232: adjusting gear; 2321: adjusting part; 2322: outer engaging part; 2323: mounting through slot; 24: bearing; 25: gland; 26: locking bolt; 27: gasket; 28: key;

[0030] 3: sleeve. DETAILED DESCRIPTION

[0031] In order to better explain the present application, so as to be understood, the present application is described in detail by specific embodiments in combination with the drawings.

[0032] As Figures 1-2 shown, the support and guide device for the sleeve of the rescue drilling machine provided by the embodiment of the present application comprises a support frame assembly 1 and at least three eccentric roller assemblies 2. The support frame assembly 1 comprises a frame body with a guide hole 11, and the eccentric roller assemblies 2 are arranged on the frame body around the guide hole 11 at intervals. In this embodiment, six eccentric roller assemblies 2 are uniformly arranged around the guide hole 11.

[0033] As Figure 3 and Figure 6As shown, the eccentric roller assembly 2 comprises a rotatable eccentric shaft 21, a roller 22, a fixing unit 23, a bearing 24 and two gland nuts 25. The eccentric shaft 21 comprises a central shaft segment 211 and an eccentric shaft segment 212. The roller 22 is rotatably sleeved on the eccentric shaft segment 212. The fixing unit 23 is sleeved on the central shaft segment 211 and fixes the eccentric shaft 21 relative to the support frame assembly 1. The eccentric shaft segment 212 is rotatably connected with the roller 22 through the bearing 24. The rolling surface of the roller 22 extends into the guide hole 11. The rolling surfaces of the rollers 22 of multiple eccentric roller assemblies 2 form a tangent circle for supporting the casing 3. The eccentric shaft 21 rotates around the axis of the central shaft segment 211 to drive the eccentric rotation of the roller 22, thereby adjusting the diameter of the tangent circle.

[0034] The support and guide device for the casing of the rescue drilling rig provided by the embodiment comprises the eccentric roller assembly 2, the eccentric roller assembly 2 comprises the eccentric shaft 21 and the roller 22 rotatably connected with the eccentric shaft 21, the rolling surface of the roller 22 extends into the guide hole 11, and the rolling surfaces of the rollers 22 of multiple eccentric roller assemblies 2 form a tangent circle for supporting the casing 3. The eccentric shaft 21 rotates around the axis of the central shaft segment 211 of the eccentric shaft 21 to drive the eccentric rotation of the roller 22, thereby adjusting the diameter of the tangent circle to adapt to casings 3 of different diameters. The support and guide device has a simple structure and is convenient to adjust.

[0035] As shown in Figure 3 The fixing unit 23 comprises a positioning gear 231 and an adjusting gear 232. The adjusting gear 232 is sleeved on the central shaft segment 211 at one end of the eccentric shaft 21 and is fixedly connected with the central shaft segment 211 of the eccentric shaft 21 in the circumferential direction through the key 28. The positioning gear 231 is sleeved on the outer side of the adjusting gear 232 and is engaged with the adjusting gear 232. The positioning gear 231 is fixed with the support frame assembly 1.

[0036] As shown in Figure 4 The adjusting gear 232 comprises a connected adjusting part 2321 and an outer engagement part 2322. The adjusting part 2321 and the outer engagement part 2322 form an integral structure. An installation hole is formed in the axial direction of the adjusting gear 232. The adjusting gear 232 is sleeved on the central shaft segment 211 at one end of the eccentric shaft 21 through the installation hole. Figure 5 As shown in The positioning gear 231 is provided with an inner engagement part 2311 in the axial direction thereof. The outer engagement part 2322 is engaged with the inner engagement part 2311 to realize the circumferential fixation of the adjusting gear 232 and the positioning gear 231.

[0037] In order to facilitate the circumferential fixing between the adjusting gear 232 and the eccentric shaft 21, one side of the mounting hole of the adjusting gear 232 is provided with a mounting through slot 2323 along the axial direction, wherein the eccentric shaft 21 is provided with a key groove corresponding to the mounting through slot 2323 of the adjusting gear 232 on the center shaft section 211 of one end of the eccentric shaft 21, and the eccentric shaft 21 is connected with the adjusting gear 232 through the key 28 after the mounting through slot 2323 and the key groove are corresponded. In order to facilitate the rotation of the adjusting gear 232, the longitudinal cross section of the adjusting part 2321 is polygonal. The eccentric roller assembly 2 further comprises a locking bolt 26 and a gasket 27, and the locking bolt 26 and the gasket 27 are arranged on one end of the center shaft section 211 of the eccentric shaft 21 to realize the axial fixing of the adjusting gear 232 and the positioning gear 231.

[0038] As shown in the drawings, Figure 7 The support frame assembly 1 comprises an upper guide frame 12, a lower guide frame 13 and two mounting seats 14, the two mounting seats 14 are oppositely arranged, the upper guide frame 12 is detachably connected above the two mounting seats 14, the lower guide frame 13 is detachably connected to the side wall of the two mounting seats 14, the upper guide frame 12 and the lower guide frame 13 are butted to form a guide hole 11, and grooves 15 are formed on the upper guide frame 12 and the lower guide frame 13 to accommodate the eccentric roller assembly 2.

[0039] The eccentric roller assembly 2 further comprises two gland nuts 25, and the two gland nuts 25 are respectively sleeved on the center shaft sections 211 of the two ends of the eccentric shaft 21 to fix the eccentric shaft 21 in the grooves 15.

[0040] The adjusting method of the eccentric roller assembly 2 is as follows: the adjusting screw is loosened, the adjusting gear 232 is pulled out outwardly to be disengaged from the positioning gear 231, the adjusting part 2321 on the adjusting gear 232 is clamped by a wrench to rotate and adjust, the rotation of the adjusting gear 232 drives the eccentric shaft 21 and the roller 22 to rotate, the eccentric shaft section 212 of the eccentric shaft 21 rotates around the axis of the center shaft section 211 as the rotation axis with a certain eccentric amount, drives the roller 22 to rotate eccentrically, and then adjusts the diameter of the circle, so that the rolling surface of the roller 22 is in close contact with the sleeve 3 to be effectively supported, the adjusting gear 232 is pushed back to the original position after the roller 22 is adjusted to the required position, the adjusting screw is tightened, and the adjusting gear 232 and the positioning gear 231 are locked by the intermeshing teeth.

[0041] In the description of the present application, it should be understood that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0042] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0045] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A support and guide device for a rescue drilling rig casing, characterized in that: The support frame assembly (1) and at least three eccentric roller assemblies (2) are provided. The support frame assembly (1) comprises a frame body with a guide hole (11), and the eccentric roller assemblies (2) are arranged on the frame body around the guide hole (11). The eccentric roller assembly (2) comprises a rotatable eccentric shaft (21) and a roller (22). The eccentric shaft (21) comprises a central shaft section (211) and an eccentric shaft section (212), and the roller (22) is rotatably sleeved on the eccentric shaft section (212). The eccentric roller assembly (2) further comprises a locking bolt (26) and a gasket (27), and the locking bolt (26) and the gasket (27) are arranged at one end of the central shaft section (211) of the eccentric shaft (21). The rolling surface of the roller (22) extends into the guide hole (11), and the rolling surfaces of the rollers (22) of multiple eccentric roller assemblies (2) form a tangent circle for supporting the casing (3). The eccentric shaft (21) is rotated with the axis of the central shaft section (211) as the rotation axis, driving the eccentric rotation of the roller (22), thereby adjusting the diameter of the tangent circle, so that the rolling surface of the roller (22) is in close contact with the casing (3) for support.

2. The support and guide device for the casing of a rescue drilling rig according to claim 1, characterized in that: The eccentric roller assembly (2) further comprises a fixing unit (23) and a bearing (24). The fixing unit (23) is sleeved on the central shaft section (211) and fixes the eccentric shaft (21) relative to the support frame assembly (1). The eccentric shaft section (212) and the roller (22) are rotationally connected through the bearing (24).

3. The support and guide device for the casing of a rescue drilling rig according to claim 2, characterized in that: The fixing unit (23) comprises a positioning gear (231) and an adjusting gear (232). The adjusting gear (232) is sleeved on the central shaft section (211) and fixedly connected with the eccentric shaft (21). The positioning gear (231) is sleeved on the outer side of the adjusting gear (232) and engaged with it, and the positioning gear (231) is fixed with the support frame assembly (1).

4. The support and guide device for the casing of a rescue drilling rig according to claim 3, characterized in that: The adjusting gear (232) comprises a connected adjusting part (2321) and an outer engagement part (2322). The adjusting part (2321) and the outer engagement part (2322) form an integral structure, and a mounting hole is formed in the axial direction of the adjusting gear (232), and the adjusting gear (232) is sleeved on the central shaft section (211) through the mounting hole. The positioning gear (231) is provided with an inner engagement part (2311) in the axial direction thereof, and the outer engagement part (2322) is engaged with the inner engagement part (2311).

5. The support and guide device for the casing of a rescue drilling rig according to claim 4, characterized in that: One side of the mounting hole of the adjusting gear (232) is provided with a mounting through slot (2323) in the axial direction thereof.

6. The support and guide device for the casing of a rescue drilling rig according to claim 4, characterized in that: The longitudinal cross section of the adjusting part (2321) is polygonal.

7. The support and guide device for the casing of a rescue drilling rig according to claim 1, characterized in that: The support frame assembly (1) comprises an upper guide frame (12), a lower guide frame (13) and two mounting seats (14); The two mounting seats (14) are oppositely arranged, the upper guide frame (12) is detachably connected above the two mounting seats (14), and the lower guide frame (13) is detachably connected to the side wall of the two mounting seats (14); The upper guide frame (12) and the lower guide frame (13) are connected to form the guide hole (11).

8. The support and guide device for the casing of a rescue drilling rig according to claim 7, characterized in that: The upper guide frame (12) and the lower guide frame (13) are provided with grooves (15) to accommodate the eccentric roller assembly (2).

9. The support and guide device for the casing of a rescue drilling rig according to claim 8, characterized in that: The eccentric roller assembly (2) further comprises two gland nuts (25); The two gland nuts (25) are respectively sleeved on the center shaft section (211) at both ends of the eccentric shaft (21) to fix the eccentric shaft (21) in the groove (15).

10. The support and guide device for the casing of a rescue drilling rig according to claim 1, characterized in that: Six groups of eccentric roller assemblies (2) are evenly arranged around the guide hole (11).

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