Water braid for underground coal mine fixed-point grouting reinforcement
Through optimizing the design, simplifying the structure, and adopting high-reliability connection methods, the existing water radial structure is solved and the problem of poor reliability is provided. A high-reliability water radial for fixed-point grouting reinforcement underground coal mines is provided, meeting the needs of fixed-point grouting reinforcement process.
Patent Information
- Application Number
- CN202421635746.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-07-10
AI Technical Summary
The existing coal mines have complex structure and poor reliability in fixed-point grouting reinforcement under fixed-point grouting and reinforcement, which cannot meet the needs of fixed-point grouting and reinforcement processes.
A water radius for fixed-point grouting reinforcement in coal mines was designed. By optimizing the structural design, including the combination of direct through, mandrel, shell, bearing and sealing structure, and using reliable connection methods such as u-pin and threaded connections, the structural composition is simplified and reliability is improved.
The water radius structure is simple and has high reliability, which can effectively improve the overall reliability of water radius and provide a simple and reliable water radius equipment for the fixed-point grouting and reinforcement process.
Smart Images
Figure CN222716884U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of coal mine machinery and relates to a water braid for fixed-point grouting reinforcement in underground coal mines. Background Art
[0002] The geological conditions in my country's coal mines are complex, and complex strata are often encountered during underground drilling construction. When drilling in complex strata, hole collapse, diameter shrinkage, and drill sticking are prone to occur, leading to poor porosity, shallow hole depth, and frequent accidents in the hole.
[0003] At present, the fixed-point grouting reinforcement process can effectively solve the problem of drilling in broken strata. Grouting requires a grouting water braid. One end of the water braid is connected to the grouting pipeline, and the other end is connected to the drill rod through a thread. It is a transition device for the reinforcement slurry to enter the drill rod. However, the existing grouting water braid has a complex structure and poor reliability, and cannot meet the needs of the fixed-point grouting reinforcement process. Utility Model Content
[0004] In view of this, the purpose of the utility model is to provide a water braid for fixed-point grouting reinforcement in coal mines. By optimizing the design of the existing water braid structure, the water identification reliability is improved, and technical support is provided for the fixed-point grouting reinforcement process.
[0005] In order to achieve the above object, the utility model provides the following technical solutions:
[0006] A water braid for fixed-point grouting reinforcement in an underground coal mine comprises a through-hole, a core shaft and a shell which are sequentially connected and communicated from left to right, wherein the right end of the through-hole is fixedly sleeved on the left end of the core shaft, the right end of the core shaft is inserted into the inner cavity of the shell along the axial direction of the shell and is rotatably connected to the shell, and sealing structures are sleeved on both ends of the core shaft to be sealed and connected to the through-hole and the shell respectively; the left end of the through-hole is used to connect to an external grouting pipeline, and the right end of the shell is used to connect to a drill rod.
[0007] Furthermore, a pair of bearings arranged opposite to each other are sleeved on the core shaft, and the bearings are arranged in the inner cavity of the shell, so that the core shaft is rotatably connected to the shell.
[0008] Furthermore, a bearing cover sleeved on the core shaft is arranged at the left end of the housing, and the bearing cover is fixed to the housing through a locking nut to limit the axial position of the bearing.
[0009] Furthermore, one end of the bearing cover is inserted into the inner cavity of the housing and is threadedly connected to the housing to improve the reliability and stability of the bearing limit.
[0010] Furthermore, an oil seal and a retaining ring are provided between the bearing gland and the bearing.
[0011] Furthermore, the sealing structures arranged at both ends of the core shaft are respectively a sealing ring arranged at the left end of the core shaft and connected to the straight-through connection, and a Gray ring arranged at the right end of the core shaft and connected to the shell.
[0012] Furthermore, the straight-through and the core shaft are fixedly connected via a U-shaped pin.
[0013] The beneficial effects of the utility model are:
[0014] The utility model provides a water braid for fixed-point grouting reinforcement in coal mines. The water braid has a simple structure, and its main components include only a straight-through, a core shaft, a bearing and a shell, which greatly simplifies the structural composition. Compared with complex mechanical structures, it has higher reliability, and each component adopts a highly reliable connection structure. For example, the straight-through and the core shaft are connected by a simple and reliable U-shaped pin, and the bearing cover and the shell are connected by a threaded connection with a locking nut, thereby ensuring the installation stability of the bearing cover, and then ensuring the installation stability of the bearing, which can effectively improve the overall reliability of the water braid and provide a simple and reliable water braid equipment for the fixed-point grouting reinforcement process.
[0015] Secondly, the structure of the water braid is that the drill pipe, shell, core shaft, straight-through and external grouting pipeline are arranged in a linear manner, so that the external grouting pipeline moves on the same straight line with the drill pipe and water braid, avoiding radial pulling of the water braid by the external grouting pipeline.
[0016] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings, in which:
[0018] Figure 1 The utility model is a schematic diagram of the structure of a water braid for fixed-point grouting reinforcement in a coal mine.
[0019] Figure numerals: 1-straight through; 2-sealing ring; 3-U-pin; 4-core shaft; 5-bearing gland; 6-locking nut; 7-oil seal; 8, retaining ring; 9-bearing; 10-Glay ring; 11-housing. DETAILED DESCRIPTION
[0020] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and the features in the embodiments can be combined with each other without conflict.
[0021] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present utility model. In order to better illustrate the embodiments of the present utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.
[0022] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back" and the like indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0023] See also Figure 1 , is a water braid for fixed-point grouting reinforcement in coal mines, installed at the tail end of the drill pipe, and serves as a transition device for external reinforcement slurry to enter the drill pipe. It includes a straight-through 1, a core shaft 4, and a shell 11 that are connected and communicated from left to right in sequence. The right end of the straight-through 1 is fixedly sleeved on the left end of the core shaft 4, and the right end of the core shaft 4 is inserted into the inner cavity of the shell 11 along the axial direction of the shell and is rotatably connected to the shell 11, and sealing structures are sleeved on both ends of the core shaft 4 to be sealed and connected to the straight-through 1 and the shell 11 respectively;
[0024] The left end of the straight through is connected to an external grouting pipeline, and the right end of the shell is connected to a drill rod.
[0025] A pair of bearings 9 arranged opposite to each other are sleeved on the core shaft 4, and the bearings 9 are arranged in the inner cavity of the shell 11, so that the core shaft 4 is rotatably connected to the shell 11; and a bearing cover 5 sleeved on the core shaft 4 is arranged at the left end of the shell 11 (close to the end of the straight through 1), and the bearing cover 5 is fixed to the shell 11 by a locking nut 6 to axially limit the bearing 9.
[0026] The core shaft 4 is also provided with a shoulder for bearing limitation, and the pair of oppositely arranged bearings 9 are respectively arranged at two ends of the shoulder.
[0027] Preferably, an oil seal 7 and a retaining ring 8 are further provided between the bearing cover 5 and the bearing 9 .
[0028] Furthermore, one end of the bearing cover 5 is inserted into the inner cavity of the housing 11 and is threadedly connected to the housing 11, thereby improving the reliability and stability of limiting the bearing 9.
[0029] Preferably, the sealing structures arranged at both ends of the core shaft 4 are respectively a sealing ring 2 arranged at the left end of the core shaft and connected to the straight-through connection and a Gly ring 10 arranged at the right end of the core shaft and connected to the housing 11 .
[0030] Preferably, the straight through 1 is fixedly connected to the core shaft 4 by a U-shaped pin 3; specifically, two sockets matching the U-shaped pin 3 are provided on the straight through 1, and an annular groove matching the U-shaped pin 3 is provided on the core shaft 4. After the straight through 1 is sleeved on the core shaft 4, by inserting the U-shaped pin 3 into the corresponding sockets and annular grooves and self-locking the U-shaped pin 3, a stable connection between the straight through 1 and the core shaft 4 can be achieved with good reliability.
[0031] Specifically, the through hole 1, the core shaft 4 and the housing 11 are all hollow structures with an inner passage. A positioning step for axially positioning the core shaft is also provided in the inner cavity of the through hole 1 to facilitate the axial positioning of the core shaft.
[0032] During drilling, the right end of the shell 11 is connected to the drill rod through a thread, and the straight-through 1 is connected to the external grouting pipeline through a threaded connection or a quick connection. The rotation transition between the external grouting pipeline and the drill rod is achieved by the core shaft 4 and the shell 11 through the bearing 9 to realize the mutual rotation between the two.
[0033] A water braid for fixed-point grouting reinforcement in underground coal mines provided in the present application has a simple structure, and its main components include only a straight-through 1, a core shaft 4, a bearing 8 and a housing 11, which greatly simplifies the structural composition, and each component adopts a highly reliable connection structure. For example, a simple and reliable U-shaped pin is used to connect the straight-through 1 and the core shaft 4, and a threaded connection with a locking nut is used to connect the bearing cover and the housing, thereby ensuring the installation stability of the bearing cover, and then ensuring the installation stability of the bearing, which can effectively improve the overall reliability of the water braid and provide a simple and reliable water braid equipment for the fixed-point grouting reinforcement process.
[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.
Claims
1. A water braid for fixed-point grouting reinforcement in coal mines, characterized in that: It includes a straight-through, a core shaft and a shell that are connected and communicated in sequence from left to right. The right end of the straight-through is fixedly sleeved on the left end of the core shaft, the right end of the core shaft is inserted into the inner cavity of the shell along the axial direction of the shell and is rotatably connected to the shell, and sealing structures are sleeved on both ends of the core shaft to be sealed and connected to the straight-through and the shell respectively; the left end of the straight-through is used to connect to the external grouting pipeline, and the right end of the shell is used to connect to the drill rod.
2. The water braid for fixed-point grouting reinforcement in underground coal mines according to claim 1 is characterized in that: A pair of bearings arranged opposite to each other are sleeved on the core shaft, and the bearings are arranged in the inner cavity of the shell, so that the core shaft is rotatably connected to the shell.
3. The water braid for fixed-point grouting reinforcement in underground coal mines according to claim 2 is characterized in that: A bearing cover sleeved on the core shaft is arranged at the left end of the housing, and the bearing cover is fixed to the housing through a locking nut to limit the axial position of the bearing.
4. The water braid for fixed-point grouting reinforcement in underground coal mines according to claim 3 is characterized in that: One end of the bearing gland is inserted into the inner cavity of the housing and is threadedly connected to the housing to improve the reliability and stability of the bearing limit.
5. The water braid for fixed-point grouting reinforcement in underground coal mines according to claim 2 is characterized in that: An oil seal and a retaining ring are also provided between the bearing gland and the bearing.
6. The water braid for fixed-point grouting reinforcement in underground coal mines according to claim 1, characterized in that: The sealing structures arranged at both ends of the core shaft are respectively a sealing ring arranged at the left end of the core shaft and connected to the straight-through connection and a Gray ring arranged at the right end of the core shaft and connected to the shell.
7. The water braid for fixed-point grouting reinforcement in underground coal mines according to claim 1, characterized in that: The straight-through and the core shaft are fixedly connected via a U-shaped pin.