Adjustable grouting steel pipe for bed separation grouting

Abstract

The invention belongs to the field of grouting steel pipes, and particularly relates to an adjustable grouting steel pipe for bed separation grouting, which comprises a pipe body, a conveying pipe is fixedly connected to the upper part of the outer side of the pipe body, a rotating shaft is mounted in the pipe body through a bearing, and a plurality of uniformly distributed connecting rods are fixedly connected to the outer side of the rotating shaft; the outer side of the connecting rod is fixedly connected with an adjusting ring, the outer side of the pipe body is provided with a limiting mechanism, the outer side of the pipe body is fixedly connected with a plurality of evenly-distributed grouting bases, and the outer sides of the grouting bases are hinged to two symmetrically-distributed overturning frames. The rotating shaft, the adjusting ring, the limiting mechanism and other structures are additionally arranged in the pipe body, in the using process, the adjusting ring can be driven by the rotating shaft to rotate, the hole area of the grouting base can be covered in the rotating process of the adjusting ring, the flowing area of grouting can be adjusted, and the grouting efficiency is improved. Therefore, the flow velocity can be controlled by adjusting the area.

Description

Technical Field

[0001] The invention relates to the technical field of grouting steel pipes, in particular to an adjustable grouting steel pipe for separation grouting. Background Art

[0002] In many fields such as mining and underground engineering construction, overburden separation grouting is an extremely important technical means. As the scale and complexity of these engineering activities continue to expand, the requirements for grouting technology are also getting higher and higher.

[0003] The principle of grouting to reduce settlement in overburden delamination is to use the special geological structure of delamination cavities formed in the overburden during rock movement. During the process of stratum movement caused by underground mining or other underground activities, delamination will occur inside the overburden, and these delamination cavities provide target space for grouting operations. Filling the delamination cavities with foreign materials from the borehole to support the overburden is the core idea of ​​the entire technology. In this way, the spread of overburden movement to the surface can be effectively slowed down, thereby reducing the impact on surface buildings, ecological environment, etc.

[0004] In the early grouting technology, for example, the grouting steel pipe proposed in Patent Authorization Announcement No.: CN209760242U has met some engineering needs to a certain extent. In this invention, by opening a plurality of slurry outlet holes in the pipe wall of the pipe body, the slurry poured into the pipe body can flow out into the soil through the slurry outlet holes. This design can effectively bond the pipe body to the soil body, and plays a positive role in soil nail support. At the same time, the setting of its support mechanism has multiple functions. On the one hand, it can support the slurry outlet holes to prevent the soil body from blocking the slurry outlet holes when the pipe body is inserted into the soil body, ensuring stable slurry outlet from the slurry outlet holes, and then ensuring stable bonding between the pipe body and the soil body, so that this technology can be applied to various soil types, especially those with poor soil quality. On the other hand, the support mechanism can also prevent the displacement of the pipe body and enhance the stability of the grouting steel pipe in the soil body.

[0005] However, with the deepening of engineering practice, some problems have gradually been exposed in the grouting steel pipes in the prior art. In the actual grouting operation, accurate control of the grouting speed is crucial. However, the existing grouting steel pipes have obvious deficiencies in this regard, and their grouting speed is not easy to adjust. Due to the lack of an effective speed control mechanism, excessive grouting is prone to occur during grouting operations. Excessive grouting will not only cause waste of materials and increase engineering costs, but may also have adverse effects on the surrounding geological structures, such as causing abnormal changes in formation pressure.

[0006] In addition, during the grouting process, the entry of soil into the hole is a problem that seriously affects the grouting effect. The environment of the construction site is complex. In the process of inserting the grouting steel pipe into the soil or other media, soil is easy to accumulate around the grouting steel pipe. When the grouting starts, these soils may enter the grouting hole under the action of slurry pressure or other external forces, causing the grouting hole to be blocked. Once the grouting hole is blocked, the slurry will not be able to flow out normally, affecting the continuity and uniformity of the grouting, thereby reducing the grouting effect, and may even cause the entire grouting operation to fail, requiring re-construction, which will undoubtedly bring huge losses and delays to the project. Therefore, in order to improve the quality and efficiency of grouting and ensure the smooth progress of the project, it is urgent to improve the existing grouting steel pipe technology, so an adjustable grouting steel pipe for delamination grouting of the present invention is proposed. Summary of the invention

[0007] The purpose of the present invention is to provide an adjustable grouting steel pipe for separation grouting, which solves the problems that the grouting speed is inconvenient to adjust and the grouting holes are easily blocked.

[0008] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: an adjustable grouting steel pipe for delamination grouting, comprising a pipe body, a conveying pipe is fixedly connected to the upper outer part of the pipe body, a rotating shaft is installed inside the pipe body through a bearing, and a sealing structure is arranged at the connection between the rotating shaft and the pipe body. This sealing structure can be in the form of a mechanical seal, including a dynamic ring, a static ring and other components. The dynamic ring is fixedly connected to the rotating shaft and rotates with the rotating shaft, and the static ring is fixed on the inner wall of the pipe body. The dynamic ring and the static ring fit tightly to prevent slurry leakage, a plurality of evenly distributed connecting rods are fixedly connected to the outer side of the rotating shaft, and an adjusting ring is fixedly connected to the outer side of the connecting rod, and the adjusting ring and the connecting rod are connected by welding. The welding process ensures that the connection is firm and the weld is uniform, so as to prevent the adjusting ring from separating from the connecting rod during use. A guide groove is arranged on the edge of the adjusting ring. The guide groove is arranged along the circumferential direction of the adjusting ring and cooperates with the protrusion on the inner wall of the tube body. The protrusion can slide in the guide groove, so that the adjusting ring remains stable during rotation and the covering area of ​​the grouting seat hole is accurately adjusted. A limiting mechanism is arranged on the outer side of the tube body. A plurality of evenly distributed grouting seats are fixedly connected to the outer side of the tube body. Two symmetrically distributed flip frames are hinged on the outer side of the grouting seat. The baffle is connected to the flip frame by a hinge. The hinge is made of high-strength alloy steel. The diameter and length of the axle pin are determined according to the size of the baffle and the flip frame to ensure that the baffle can be flexibly flipped around the hinge. A limit block is provided at the connection position between the flip frame and the grouting seat, the limit block limits the flipping angle of the flip frame to prevent it from over-flipping, ensures that the baffle can be accurately reset and effectively block the soil during normal operation, and avoids abnormal movement under the slurry pressure. The outer sides of the two flip frames are fixedly connected with baffles, and a sealing strip is fixedly connected between the two baffles. The outer side of the grouting seat is fixedly connected with two symmetrically distributed fixing frames, and a spring is provided inside the fixing frame.

[0009] Preferably, a support frame is fixedly connected to the upper part of the inner wall of the tube body, and the support frame is connected to the rotating shaft through a bearing, and the support frame can support the rotating shaft. The support frame is composed of two semicircular support rings, and the support rings are made of metal. The thickness and width of the support rings are determined according to the inner diameter of the tube body and the stress conditions of the rotating shaft. The two support rings are connected by bolts, and the bolts are distributed on the circumference of the support rings to ensure a firm connection and form support for the rotating shaft. The support ring is connected to the rotating shaft through a bearing. The bearing model is selected according to parameters such as the diameter and rotation speed of the rotating shaft, and is installed in the bearing seat of the support ring. The bearing seat and the support ring are designed as an integrated whole to ensure stable support for the rotating shaft. The support ring is connected to the inner wall of the tube body by welding, and the welding points are evenly distributed on the contact surface between the support ring and the tube body to ensure a firm connection and to withstand various forces during the grouting process.

[0010] Preferably, the sealing strip is in contact with the grouting seat, the two sealing strips are in contact with each other, the baffle is in contact with the grouting seat, and the sealing strip can seal the connection between the two baffles.

[0011] Preferably, one end of the spring one is fixedly connected to the fixing frame, and one end of the spring one is connected to the fixing frame through a hook. The hook and the fixing frame are firmly welded, and the size of the hook matches the inner diameter of the spring one, so that the spring one can be stably installed. The other end of the spring one is fixedly connected to the flip frame, and the other end is connected to the flip frame through a slot. The slot is provided on the flip frame, and its shape is adapted to the end of the spring one to prevent the spring one from falling off during operation. The spring one can drive the flip frame to automatically reset through elastic force.

[0012] Preferably, the limiting mechanism includes a limiting wheel, the limiting wheel is fixedly connected to the upper outer side of the rotating shaft, the limiting wheel is connected to the rotating shaft by a key, the type of key is a flat key, the flat key is installed in the keyway of the rotating shaft and the limiting wheel, to ensure that the limiting wheel can rotate synchronously with the rotating shaft and transmit torque stably, the outer side of the tube body is fixedly connected to a guide frame, the pull ring plate and the guide frame are slidably connected by a dovetail groove structure, the dovetail groove structure can make the pull ring plate slide stably on the guide frame to avoid displacement during movement. The limiting teeth and the pull ring plate adopt an integrated design, this design ensures the connection strength between the limiting teeth and the pull ring plate, the limiting teeth can accurately follow when the pull ring plate moves, the outer side of the guide frame is slidably connected to the pull ring plate, the outer side of the pull ring plate is fixedly connected to the limiting teeth, the outer side of the guide frame is provided with a second spring, and the pull ring plate can drive the limiting teeth to move.

[0013] Preferably, a handle is fixedly connected to the upper end of the limiting wheel, the limiting wheel is in contact with the tube body, and the handle can drive the limiting wheel to rotate.

[0014] Preferably, the pull ring plate contacts the tube body, the limiting teeth are clamped with the inside of the groove of the limiting wheel, the limiting teeth are slidably connected to the tube body, and the limiting teeth can limit the rotating shaft through the limiting wheel.

[0015] Preferably, one end of the spring 2 is fixedly connected to the pull ring plate, and one end of the spring 2 is welded to the pull ring plate. The welding position ensures that the elastic force of the spring 2 can effectively act on the pull ring plate, and the welding is firm. The other end of the spring 2 is fixedly connected to the guide frame. The spring 2 can drive the pull ring plate to automatically reset through the elastic force.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention adds structures such as a rotating shaft, an adjusting ring and a limiting mechanism inside the pipe body. During use, the adjusting ring can be driven to rotate by the rotating shaft. During the rotation, the adjusting ring can cover the hole area of ​​the grouting seat and adjust the flow area of ​​the grouting, so that the flow rate can be controlled by adjusting the area.

[0018] 2. The present invention adds structures such as baffles, flip frames and sealing strips to the grouting seat. During use, the baffles can be used to cover the holes of the grouting seat. During grouting, the baffles can be opened by the pressure of the cement slurry, thereby effectively avoiding internal blockage of the grouting seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention;

[0020] Figure 2 For the present invention Figure 1 A three-dimensional cross-sectional view of

[0021] Figure 3 For the present invention Figure 2 A three-dimensional diagram of the rotating shaft;

[0022] Figure 4 For the present invention Figure 1 A three-dimensional enlarged view of the grouting seat;

[0023] Figure 5 For the present invention Figure 2 A-section structure enlarged view.

[0024] In the figure: 1. pipe body; 2. conveying pipe; 3. rotating shaft; 4. connecting rod; 5. adjusting ring; 6. limiting mechanism; 7. supporting frame; 8. grouting seat; 9. turning frame; 10. baffle; 11. sealing strip; 12. fixing frame; 13. spring one; 61. limiting wheel; 62. handle; 63. pull ring plate; 64. guide frame; 65. limiting tooth; 66. spring two. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 A kind of adjustable grouting steel pipe for delamination grouting, comprises a pipe body 1, a conveying pipe 2 is fixedly connected to the upper outer side of the pipe body 1, a rotating shaft 3 is installed inside the pipe body 1 through a bearing, a plurality of evenly distributed connecting rods 4 are fixedly connected to the outer side of the rotating shaft 3, an adjusting ring 5 is fixedly connected to the outer side of the connecting rod 4, a limiting mechanism 6 is arranged on the outer side of the pipe body 1, a plurality of evenly distributed grouting seats 8 are fixedly connected to the outer side of the pipe body 1, two symmetrically distributed turning frames 9 are hinged on the outer side of the grouting seat 8, baffles 10 are fixedly connected to the outer sides of the two turning frames 9, a sealing strip 11 is fixedly connected between the two baffles 10, two symmetrically distributed fixing frames 12 are fixedly connected to the outer side of the grouting seat 8, and a spring 13 is arranged inside the fixing frame 12.

[0027] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 A support frame 7 is fixedly connected to the upper part of the inner wall of the tube body 1, and the support frame 7 is connected to the rotating shaft 3 through a bearing. The support frame 7 can support the rotating shaft 3, the sealing strip 11 is in contact with the grouting seat 8, the two sealing strips 11 are in contact with each other, the baffle 10 is in contact with the grouting seat 8, the sealing strip 11 can seal the connection between the two baffles 10, one end of the spring 13 is fixedly connected to the fixed frame 12, and the other end of the spring 13 is fixedly connected to the flip frame 9, and the spring 13 can drive the flip frame 9 to automatically reset through elastic force.

[0028] See also Figure 1 , Figure 2 , Figure 5The limiting mechanism 6 includes a limiting wheel 61, a limiting wheel 61 is fixedly connected to the upper outer side of the rotating shaft 3, a guide frame 64 is fixedly connected to the outer side of the tube body 1, a pull ring plate 63 is slidably connected to the outer side of the guide frame 64, a limiting tooth 65 is fixedly connected to the outer side of the pull ring plate 63, and a spring 2 66 is arranged on the outer side of the guide frame 64. The pull ring plate 63 can drive the limiting tooth 65 to move. The upper end of the limiting wheel 61 is fixedly connected to a handle 62, the limiting wheel 61 contacts the tube body 1, and the handle 62 can drive the limiting wheel 61 to rotate, the pull ring plate 63 contacts the tube body 1, the limiting tooth 65 is clamped inside the groove of the limiting wheel 61, the limiting tooth 65 is slidably connected to the tube body 1, and the limiting tooth 65 can limit the rotating shaft 3 through the limiting wheel 61, one end of the spring 2 66 is fixedly connected to the pull ring plate 63, and the other end of the spring 2 66 is fixedly connected to the guide frame 64, and the spring 2 66 can drive the pull ring plate 63 to automatically reset through elastic force.

[0029] The specific implementation process of the present invention is as follows: when in use, the tube body 1 is inserted into the interior of the abscission layer. During the insertion process, the baffle 10 blocks the hole of the grouting seat 8, which can effectively prevent soil from entering the interior of the grouting seat 8. After the tube body 1 is inserted, the pull ring plate 63 is pulled, and the pull ring plate 63 drives the limit tooth 65 to move and compresses the spring 2 66. When the limit tooth 65 is separated from the limit wheel 61, the handle 62 can be used to drive the limit wheel 61 and the rotating shaft 3 to rotate. During the rotation of the rotating shaft 3, the connecting rod 4 can drive the adjusting ring 5 to rotate. During the rotation, the adjusting ring 5 can block the hole of the grouting seat 8, so that the grouting rate can be adjusted. After the adjustment is completed, the pull ring plate 63 is released, and the spring 2 66 is reset. The spring 2 66 can drive the limit tooth 65 of the pull ring plate 63 to slide into the interior of the limit wheel 61 through elastic force to complete the adjustment;

[0030] Then, concrete slurry is injected into the interior of the pipe body 1 through the delivery pipe 2. During the flow of the slurry inside the pipe body 1, the interior of the pipe body 1 is pre-filled. After being filled, the baffle 10 is deflected under the push of the slurry pressure, so that the slurry can be discharged through the gap between the baffle 10 and the grouting seat 8, thereby making grouting more convenient.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable grouting steel pipe for separation grouting, comprising a pipe body (1), characterized in that: A conveying pipe (2) is fixedly connected to the upper outer portion of the tube body (1); a rotating shaft (3) is installed inside the tube body (1) via a bearing; a plurality of evenly distributed connecting rods (4) are fixedly connected to the outer side of the rotating shaft (3); an adjusting ring (5) is fixedly connected to the outer side of the connecting rod (4); a limiting mechanism (6) is provided on the outer side of the tube body (1); a plurality of evenly distributed grouting seats (8) are fixedly connected to the outer side of the tube body (1); two symmetrically distributed turning frames (9) are hingedly connected to the outer side of the grouting seat (8); baffles (10) are fixedly connected to the outer sides of the two turning frames (9); a sealing strip (11) is fixedly connected between the two baffles (10); two symmetrically distributed fixing frames (12) are fixedly connected to the outer side of the grouting seat (8); a spring (13) is provided inside the fixing frame (12).

2. The adjustable grouting steel pipe for separation grouting according to claim 1 is characterized in that: A support frame (7) is fixedly connected to the upper portion of the inner wall of the tube body (1), and the support frame (7) is connected to the rotating shaft (3) via a bearing.

3. The adjustable grouting steel pipe for separation grouting according to claim 1 is characterized in that: The sealing strip (11) is in contact with the grouting seat (8), the two sealing strips (11) are in contact with each other, and the baffle (10) is in contact with the grouting seat (8).

4. The adjustable grouting steel pipe for separation grouting according to claim 1 is characterized in that: One end of the spring one (13) is fixedly connected to the fixing frame (12), and the other end of the spring one (13) is fixedly connected to the flip frame (9).

5. The adjustable grouting steel pipe for separation grouting according to claim 1 is characterized in that: The limiting mechanism (6) comprises a limiting wheel (61), the upper outer portion of the rotating shaft (3) is fixedly connected to the limiting wheel (61), the outer side of the tube body (1) is fixedly connected to a guide frame (64), the outer side of the guide frame (64) is slidably connected to a pull ring plate (63), the outer side of the pull ring plate (63) is fixedly connected to a limiting tooth (65), and the outer side of the guide frame (64) is provided with a second spring (66).

6. The adjustable grouting steel pipe for separation grouting according to claim 5 is characterized in that: The upper end of the limiting wheel (61) is fixedly connected to a handle (62), and the limiting wheel (61) is in contact with the tube body (1).

7. The adjustable grouting steel pipe for separation grouting according to claim 5 is characterized in that: The pull ring plate (63) is in contact with the tube body (1), the limiting teeth (65) are engaged with the inside of the groove of the limiting wheel (61), and the limiting teeth (65) are slidably connected with the tube body (1).

8. The adjustable grouting steel pipe for separation grouting according to claim 5, characterized in that: One end of the second spring (66) is fixedly connected to the pull ring plate (63), and the other end of the second spring (66) is fixedly connected to the guide frame (64).

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