A single spiral column
The single-unit helical column, through the combination of screw drive and adjustable movable column design, solves the limitations of hydraulic props in terms of use and portability, achieving efficient and low-cost support, adapting to complex geological conditions, and avoiding oil leakage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG SINO ELECTROMECHANICAL EQUIP TECH CO LTD
- Filing Date
- 2025-10-16
- Publication Date
- 2026-07-31
AI Technical Summary
Existing hydraulic props have limitations in tunnel support, including limited application scope, poor portability, cumbersome operation, high cost, easy leakage, and inability to adapt to complex geological conditions.
It adopts a single spiral column design, combined with screw drive and adjustable movable column, and achieves independent support through the drive mechanism. It is equipped with mechanical locking device and hinged base to adapt to different heights and geological conditions.
It has expanded the scope of application, improved portability and support efficiency, reduced costs, prevented oil leakage, and enhanced adaptability and safety under complex geological conditions.
Smart Images
Figure CN224579353U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tunnel support equipment technology, specifically to a single spiral column. Background Technology
[0002] In underground engineering construction such as tunnel support or underground mining, the excavated space needs to be supported to ensure construction safety. Currently, most of these support devices are hydraulic supports and hydraulic pillars. These hydraulic pillars use externally injected hydraulic jacks as support columns, which have the following disadvantages: a) Each hydraulic pillar cannot be used independently; a hydraulic pump station is required to supply high-pressure fluid, limiting its application range; b) Hydraulic pillars have poor portability, and their installation with the hydraulic pump station is slow, affecting support time; c) Each use requires re-pressure testing before reuse, which is cumbersome, requires a lot of manpower, and has high operating costs; d) They consume a lot of oil and are prone to internal oil leaks, causing environmental pollution; e) On special inclined surfaces, the top plate of the support cannot be inclined, making it unable to cope with complex underground support conditions. Therefore, how to provide a single spiral pillar that is widely applicable, portable, low in operating costs, has high safety performance, and is environmentally friendly and energy-saving has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0003] This utility model addresses the shortcomings of existing technologies by providing a single spiral column.
[0004] This utility model is achieved through the following technical solution: a single spiral column is provided, including a lower column tube and an upper column tube sleeved inside the lower column tube. A mounting housing is fixedly connected to the lower column tube, and a lead screw is axially connected inside the mounting housing. The lead screw is threadedly connected to the upper column tube. A drive mechanism for driving the lead screw to rotate is installed inside the mounting housing. The model also includes a movable column body sleeved inside the upper column tube. The movable column body is fixedly connected to the upper end of the upper column tube through a clamp assembly.
[0005] In this design, the drive mechanism drives the lead screw to rotate, thereby causing the upper column tube and the movable column to rise. The movable column is supported by the upper end of the movable column, and it can retract inside the upper column tube and be fixed by the clamp assembly, thus improving the adaptability to support different heights.
[0006] As an optimization, the drive mechanism includes a drive shaft connected to the side of the mounting housing, a driving bevel gear fixed to the drive shaft, and a driven bevel gear fixed to the lower end of the lead screw, wherein the driven bevel gear meshes with the driving bevel gear. In this design, power transmission is achieved through the rotation of the drive shaft and the meshing of the driving and driven bevel gears, thereby driving the lead screw to rotate.
[0007] As an optimization, the drive mechanism also includes a hand crank assembly fixed to the drive shaft. The hand crank assembly provided in this design facilitates manual rotation of the drive shaft.
[0008] As an optimization, a thrust bearing is installed inside the mounting housing, located below the driven bevel gear. In this design, the lead screw is rotatably supported within the mounting housing via the thrust bearing, thus improving the support strength.
[0009] As an optimization, the clamp assembly includes a clamp fixed to the upper end of the upper column tube and a locking sleeve wrapped around the movable column body. The lower end of the locking sleeve is supported inside the clamp. The locking sleeve has a butt joint, and a first cone block and a second cone block are fixed to the locking sleeve on both sides of the butt joint, respectively. It also includes a wedge block located between the second cone block and the clamp. The locking sleeve can be locked and released by inserting and pulling out the wedge block, thereby realizing the fixation and release between the movable column body and the upper column tube.
[0010] As an optimization, the clamp assembly further includes multiple arc plates evenly distributed along the circumference of the movable column. These arc plates are located within the locking sleeve, and both the upper and lower ends of the arc plates have outwardly bent flanges. The locking sleeve is located between the upper and lower flanges. In this design, the locking sleeve achieves the enclosure of the movable column through multiple arc plates.
[0011] As an optimization, the clamp assembly also includes a circular spring clip fitted onto the movable column, the circular spring clip being located below the arc plate.
[0012] As an optimization, the lead screw passes through the upper column tube, and an internally threaded sleeve that is threadedly connected to the lead screw is fixed to the lower end of the upper column tube. In this design, the internally threaded sleeve achieves the threaded connection between the upper column tube and the lead screw.
[0013] As an optimization, the lower end of the lower column tube is equipped with a hinged base. The hinged base includes a movable base, an upper spherical panel fixed to the lower end of the lower column tube, and a lower spherical panel fixed below the upper spherical panel via a connecting rod. The movable base has a spherical surface between the upper and lower spherical panels, and a circular hole is opened on the spherical surface. The diameter of the circular hole is larger than the diameter of the connecting rod. The hinged base in this solution solves the problem of adapting the base to uneven or inclined roadway support. Through the hinged limiting action, the single helical column has a certain swing capability in both longitudinal and transverse directions, improving the adaptability of the single helical column and better maintaining roadway support.
[0014] The beneficial effects of this utility model are as follows: This utility model provides a single spiral column, which combines screw drive with an adjustable movable column. It can independently complete support operations without relying on an external hydraulic pump station, greatly expanding its application range, especially suitable for construction environments without a power source or far from a pump station. Its overall structure is compact and lightweight, and the installation and adjustment process is simple and quick, significantly improving support efficiency and shortening operation time. The movable column is fixed by a mechanical locking device, avoiding the repeated pressure testing and maintenance work required by the hydraulic system, reducing labor and time costs, and also eliminating environmental pollution problems caused by oil leakage, meeting energy conservation and environmental protection requirements. Furthermore, the adjustable length of the movable column, combined with a top clamp locking mechanism, allows it to flexibly adapt to the support needs of different heights and inclined top surfaces, enhancing adaptability and safety reliability under complex geological conditions. The overall structure is stable, easy to operate, and has good promotional value and application prospects. Attached Figure Description
[0015] Figure 1 This is a cross-sectional schematic diagram of the present invention; Figure 2 This is a partially enlarged view of the drive mechanism of this utility model; Figure 3 This is a cross-sectional view of the clamp assembly of this utility model; Figure 4 This is a schematic diagram of the structure of the clamp assembly of this utility model; Figure 5 This is a front view of the clamp assembly of this utility model; Figure 6 This utility model Figure 5 Sectional view of plane AA; Figure 7 This utility model Figure 5 BB section view; Figure 8 This is a schematic diagram of the clamp assembly structure without clamps according to this utility model; Figure 9 This is a schematic diagram of the arc plate of this utility model; Figure 10 This is a partial enlarged view of the hinged base of this utility model; As shown in the figure: 1. Lower column tube; 2. Hinge base; 21. Upper ball panel; 22. Lower ball panel; 23. Movable base; 24. Connecting rod; 3. Clamp assembly; 31. Clamp; 32. Arc plate; 33. Locking sleeve; 34. Circular spring clip; 35. First cone block; 36. Second cone block; 37. Wedge block; 4. Upper column tube; 5. Movable column; 6. Mounting housing; 7. Hand crank assembly; 8. Lead screw; 9. Internal threaded sleeve; 10. Passive bevel gear; 11. Active bevel gear; 12. Drive shaft; 13. Flange end cover; 14. Thrust bearing. Detailed Implementation
[0016] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to describe the solution.
[0017] like Figures 1-10 As shown, a single spiral column of this utility model includes a lower column tube 1 and an upper column tube 4 sleeved inside the lower column tube 1. The lower end of the upper column tube 4 is inserted into the upper end of the lower column tube 1, thereby realizing the telescopic structure of the two.
[0018] In use, the lower end of the lower column tube 1 is supported on the ground. To adapt to uneven ground, the lower end of the lower column tube 1 is equipped with a hinged base 2, such as... Figure 10 As shown, the hinged base 2 includes a movable base 23, an upper spherical panel 21 fixed to the lower end of the lower column tube 1, and a lower spherical panel 22 fixed to the lower part of the upper spherical panel 21 via a connecting rod 24. The upper spherical panel 21 is a spherical shape with an opening facing downwards and is welded to the lower end of the lower column tube 1. The lower spherical panel 22 is nearly parallel to the upper spherical panel 21, thereby forming a spherical space between them. The connecting rod 24 passes through the middle of this space. The movable base 23 is a cover-shaped structure with an opening at the bottom. The middle part of the upper end of the movable base 23 is provided with a spherical part located between the upper spherical panel 21 and the lower spherical panel 22, so that the spherical part can swing freely in the space between the lower spherical panel 22 and the upper spherical panel 21. In order to achieve the limiting effect, a circular hole is opened on the spherical part in this embodiment. The diameter of the circular hole is larger than the diameter of the connecting rod 24, so that the limiting effect is achieved by the cooperation of the circular hole and the connecting rod 24. The hinged base solves the problem of adapting the base to roadway support with uneven or inclined floor plates. Through the hinged limiting effect, the single spiral column has a certain swinging ability in both longitudinal and transverse directions, improving the adaptability of the single spiral column and better maintaining roadway support.
[0019] In order to achieve the lifting and lowering of the upper column tube 4, a mounting housing 6 is fixedly connected to the lower column tube 1. In this embodiment, the lower column tube 1 is formed by connecting two round tubes arranged vertically, and the mounting housing 6 is welded to the connection position.
[0020] A lead screw 8 is axially connected inside the mounting housing 6. The upper end of the lead screw 8 passes through the upper column tube 4, and the lower end of the upper column tube 4 is fixedly connected to an internally threaded sleeve 9 that is threadedly connected to the lead screw 8. This achieves a threaded connection between the lead screw 8 and the upper column tube 4. The upper column tube 4 can be raised or lowered by rotating the lead screw 8, and the threaded connection provides a self-locking effect.
[0021] The mounting housing 6 contains a drive mechanism for rotating the lead screw 8, such as... Figure 2As shown, the drive mechanism includes a drive shaft 12 connected to the side of the mounting housing 6, an active bevel gear 11 fixed to the drive shaft 12, and a passive bevel gear 10 fixed to the lower end of the lead screw 8. The passive bevel gear 10 meshes with the active bevel gear 11.
[0022] The drive shaft 12 is horizontally positioned and connected to the flange end cover 13 on the side of the mounting housing 6, so that one end is located outside the mounting housing 6 and the other end is located inside. The drive mechanism also includes a hand crank assembly 7 fixed to the drive shaft 12. The hand crank assembly 7 is located on the outside, so that the drive shaft 12 can be rotated manually. The mounting housing 6 contains a thrust bearing 14 located below the driven bevel gear 10. The lead screw is rotatably supported within the mounting housing via the thrust bearing, which improves the support strength.
[0023] Since manual rotation for lifting is inefficient, in order to reduce the stroke of manual lifting and to adapt to different support heights, this utility model also includes a movable column 5 sleeved inside the upper column tube 4. The movable column 5 is a hollow round rod, and the lower end of the movable column 5 is inserted into the upper column tube 4 to realize the telescopic operation of the two.
[0024] The movable column 5 is fixedly connected to the upper end of the upper column tube 4 via the clamp assembly 3. For example... Figure 3-9 As shown, the clamp assembly 3 includes a clamp 31 fixed to the upper end of the upper column tube 4 and a locking sleeve 33 wrapped around the movable column body 5. The clamp 31 has a frame structure, with its lower end welded to the upper end face of the upper column tube 4, and the movable column body 5 passes through the clamp 31.
[0025] The locking sleeve 33 has a butt joint, such as Figure 8 As shown, the locking sleeve 33 is manufactured by cutting a vertical butt joint on a vertical circular tube, so that it can wrap around or release the live cylinder 5.
[0026] The clamp assembly 3 also includes a plurality of arc plates 32 evenly distributed around the circumference of the movable column 5. The inner side of the arc plates 32 fits against the movable column, and the arc plates 32 are located inside the locking sleeve 33. Figure 9 As shown, both the upper and lower ends of the arc plate 32 have outwardly bent flanges, and the locking sleeve 33 is located between the upper and lower flanges.
[0027] The clamp assembly 3 also includes a circular spring clip 34 fitted onto the movable column 5, the circular spring clip 34 being located below the arc plate 32. This supports the lower end of the locking sleeve 33 within the clamp 31. The circular spring clip is shaped similarly to a spring washer, and in this embodiment, the cross-section of the circular spring clip is circular.
[0028] A first cone block 35 and a second cone block 36 are fixedly connected to the locking sleeves 33 on both sides of the joint, and a wedge block 37 is also included between the second cone block 36 and the clamp 31. The first cone block 35 is stuck on the side of the clamp 31. The wedge block 37 is driven inward to push the second cone block 36 toward the first cone block 35, thereby pushing it inward through the locking sleeve 33 and pressing the movable column through the arc plate 32.
[0029] A method for using a single spiral column includes the following steps: In use, adjust the extension length of the movable column 5 according to the height of the required support position. When adjusting, knock the wedge 37 in the clamp assembly 3 outward to release the locking sleeve 33, and then adjust the extension length of the movable column 5. After the adjustment is completed, knock the wedge 37 inward to tighten the movable column 5 through the locking sleeve 33, thereby fixing the movable column 5 to the upper column tube 4.
[0030] The single spiral column is vertically set at the position where support is needed. The hand crank assembly 7 is turned, and the active bevel gear 11 on the drive shaft 12 drives the passive bevel gear 10 at the lower end of the lead screw 8 to rotate, thereby driving the lead screw 8 to rotate and causing the upper column tube 4 and the movable column 5 to rise, and the upper end of the movable column 5 provides support.
[0031] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.
Claims
1. A single helical column, characterized by: It includes a lower column tube (1) and an upper column tube (4) sleeved inside the lower column tube (1). A mounting housing (6) is fixedly connected to the lower column tube (1). A lead screw (8) is axially connected inside the mounting housing (6). The lead screw (8) is threadedly connected to the upper column tube (4). A drive mechanism for driving the lead screw (8) to rotate is installed inside the mounting housing (6). It also includes a movable column (5) sleeved inside the upper column tube (4). The movable column (5) is fixedly connected to the upper end of the upper column tube (4) through a clamp assembly (3).
2. A single helical column according to claim 1, wherein: The drive mechanism includes a drive shaft (12) connected to the side of the mounting housing (6), an active bevel gear (11) fixed to the drive shaft (12), and a passive bevel gear (10) fixed to the lower end of the lead screw (8). The passive bevel gear (10) meshes with the active bevel gear (11).
3. A single helical column according to claim 2, wherein: The drive mechanism also includes a hand crank assembly (7) fixed to the drive shaft (12).
4. A single helical column according to claim 2, wherein: The mounting housing (6) contains a thrust bearing (14) located below the passive bevel gear (10).
5. A single helical column according to claim 1, wherein: The clamp assembly (3) includes a clamp (31) fixed to the upper end of the upper column tube (4) and a locking sleeve (33) wrapped around the movable column (5). The lower end of the locking sleeve (33) is supported inside the clamp (31). The locking sleeve (33) has a butt joint. A first cone block (35) and a second cone block (36) are fixed to the locking sleeve (33) on both sides of the butt joint, and also includes a wedge block (37) located between the second cone block (36) and the clamp (31).
6. A single helical column according to claim 5, wherein: The clamp assembly (3) also includes a plurality of arc plates (32) evenly distributed around the circumference of the movable column (5). The arc plates (32) are located inside the locking sleeve (33). Both the upper and lower ends of the arc plates (32) have outwardly bent flanges, and the locking sleeve (33) is located between the upper and lower flanges.
7. A single helical column according to claim 6, wherein: The clamp assembly (3) also includes a circular spring clip (34) fitted onto the movable column (5), the circular spring clip (34) being located below the arc plate (32).
8. A single helical column according to claim 1, wherein: The lead screw (8) is inserted into the upper column tube (4), and the lower end of the upper column tube (4) is fixed with an internal thread sleeve (9) that is threadedly connected to the lead screw (8).
9. A single helical column according to claim 1, wherein: The lower end of the lower column tube (1) is equipped with a hinged base (2). The hinged base (2) includes a movable base (23), an upper ball panel (21) fixed to the lower end of the lower column tube (1), and a lower ball panel (22) fixed to the lower part of the upper ball panel (21) by a connecting rod (24). The movable base (23) is provided with a spherical surface between the upper ball panel (21) and the lower ball panel (22). A circular hole is opened on the spherical surface. The diameter of the circular hole is larger than the diameter of the connecting rod (24).