A temporary support device for coal mine tunneling

Abstract

This utility model relates to the field of coal mine excavation technology and discloses a temporary support device for coal mine tunneling, comprising four columns. A sliding plate is slidably connected inside each column, and a support column is fixedly connected to the top of the sliding plate. A top plate is fixedly connected between the tops of two distant support columns, and a support plate is fixedly connected between the tops of two top plates. A fixing component is provided inside the top plate, and an adjusting component is provided on the outer wall of each column. The adjusting component includes a housing, a rack plate, and a rotating shaft. The housing is fixedly connected to the outer wall of the column, and the rack plate is fixedly connected to the top of the sliding plate. In this utility model, the adjusting component achieves height adjustment through the meshing transmission of a worm gear and a worm with the rack plate. The worm gear transmission has the characteristics of smooth transmission and high precision, accurately converting the rotation of the rotating shaft into the up-and-down movement of the rack plate, thereby driving the support columns, top plates, and support plates to achieve smooth lifting and lowering.

Description

Technical Field

[0001] This utility model relates to the field of coal mine excavation technology, and in particular to a temporary support device for coal mine tunneling. Background Technology

[0002] In coal mining, tunneling is a crucial preliminary step, primarily involving excavation to create roadways that provide access for subsequent coal mining and transportation. Temporary support devices for coal tunneling are key pieces of equipment used during tunneling operations to provide temporary support to the roadway roof to prevent dangerous situations such as collapse or falling of the surrounding rock.

[0003] Most existing temporary support devices for coal mine tunneling have relatively fixed structures. During use, it is difficult to adjust the support device itself according to the actual conditions of the roadway, making it difficult to meet different usage scenarios. At the same time, the relatively fixed structure requires a lot of space for transportation and is also inconvenient to move in the roadway. Therefore, a new temporary support device for coal mine tunneling is proposed. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a temporary support device for coal mine tunneling, which aims to improve the problem that the support device itself is difficult to adjust according to the actual situation of the roadway during use, and thus cannot meet the needs of different usage scenarios.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a temporary support device for coal mine tunneling, comprising four columns, a sliding plate slidably connected inside the columns, a support column fixedly connected to the top of the sliding plate, a top plate fixedly connected between the tops of two distant support columns, a support plate fixedly connected between the tops of two top plates, a fixing component provided inside the top plate, and an adjustment component provided on the outer wall of the columns;

[0006] The adjustment assembly includes a housing, a rack plate, and a rotating shaft. The housing is fixedly connected to the outer wall of the column, the rack plate is fixedly connected to the top of the slide plate, and the rotating shaft is rotatably connected to the inner wall of the housing. A worm gear is rotatably connected inside the housing, and a worm is fixedly connected to the outer wall of the rotating shaft. The rack plate and the worm gear mesh with each other, and the worm gear and the worm are meshed with each other. A locking assembly is provided on the top of the housing.

[0007] As a further description of the above technical solution:

[0008] The locking assembly includes a housing, which is fixedly connected to the top of the housing. A toothed block is fixedly connected to the inner wall of the housing, and a pull rod is slidably connected to the inner wall of the housing. Two connecting rods are fixedly connected to the outer wall of the pull rod, and a toothed block is fixedly connected between the outer walls of the two connecting rods. A spring is sleeved on the outer wall of the pull rod, and the toothed block and the toothed block engage with each other.

[0009] As a further description of the above technical solution:

[0010] The fixing assembly includes two insert rods, the outer walls of which are slidably connected to the inner wall of the top plate, a limit plate is fixedly connected to the outer walls of the insert rods, and a spring is sleeved on the outer walls of the insert rods.

[0011] As a further description of the above technical solution:

[0012] The inner wall of the support plate is equipped with reinforcing ribs, and the top of the column is fixedly connected with a tapered foot.

[0013] As a further description of the above technical solution:

[0014] The outer wall of the rotating shaft has two sliding grooves, the outer wall of the connecting rod is slidably connected to the inner wall of the sliding groove, and the outer wall of the pull rod is slidably connected to the inner wall of the rotating shaft.

[0015] As a further description of the above technical solution:

[0016] The outer wall of the second toothed block is slidably connected to the inner wall of the outer shell.

[0017] As a further description of the above technical solution:

[0018] The insertion rod passes through the top plate and engages with the support column.

[0019] As a further description of the above technical solution:

[0020] One end of the second spring is fixedly connected to the inner wall of the top plate, and the other end of the second spring is fixedly connected to the outer wall of the limiting plate.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, the adjustment component achieves height adjustment through the meshing transmission of worm gear, worm and rack plate. The worm gear transmission has the characteristics of smooth transmission and high precision. It can accurately convert the rotation of the shaft into the up and down movement of the rack plate, thereby driving the support column, roof plate and support plate to achieve smooth lifting and lowering, ensuring the accuracy of height adjustment, and can flexibly adapt to the roadway support needs of different heights.

[0023] 2. In this utility model, the locking component is locked by the engagement of tooth block one and tooth block two, and is kept locked under the action of spring one. It can reliably lock the rotating shaft and prevent the adjustment component from rotating accidentally, which would cause the support height to change, thus further ensuring the stability of the device during the support process.

[0024] 3. In this utility model, the insertion rod in the fixing component can be reliably inserted into the support column under the elastic force of the second spring, so as to realize the firm connection between the top plate and the support column, effectively preventing relative movement between the two during the support process and ensuring the stability of the support. At the same time, the insertion rod can be pulled and released to fix or release the fixation, so as to achieve the effect of quick installation and separation of the support column and the top plate. Attached Figure Description

[0025] Figure 1 This is a perspective view of a temporary support device for coal mine tunneling proposed in this utility model;

[0026] Figure 2 For this Figure 1 Enlarged view of point A in the middle;

[0027] Figure 3 This is a cross-sectional view of the column of a temporary support device for coal mine tunneling proposed in this utility model;

[0028] Figure 4 for Figure 3 Enlarged view at point B in the middle;

[0029] Figure 5 This is a schematic diagram of a toothed block of a temporary support device for coal mine tunneling proposed in this utility model;

[0030] Figure 6 This is a sectional view of the roof of a temporary support device for coal mine tunneling proposed in this utility model.

[0031] Legend:

[0032] 1. Column; 2. Slide plate; 3. Support column; 4. Top plate; 5. Support plate; 6. Reinforcing rib; 7. Shell; 8. Rack plate; 9. Worm gear; 10. Shaft; 11. Worm; 12. Outer shell; 13. Tooth block one; 14. Tie rod; 15. Connecting rod; 16. Tooth block two; 17. Spring one; 18. Slide groove; 19. Insert rod; 20. Limiting plate; 21. Spring two. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Reference Figures 1-3 This utility model provides an embodiment of a temporary support device for coal mine tunneling, comprising four columns 1, which are respectively located at the four corners of the device, collectively serving as the foundation for stable support of the entire support device. A sliding plate 2 is slidably connected inside each column 1, allowing the sliding plate 2 to slide up and down along the axis of the column 1, thus providing a moving base for the raising and lowering of support columns 3. A support column 3 is fixedly connected to the top of the sliding plate 2, and the support column 3 rises and falls as the sliding plate 2 slides, thereby driving the top plate 4 and support plate 5 to adjust their height. A top plate 4 is fixedly connected between the tops of two distant support columns 3, and the top plate 4 supports the two distant support columns 3. The support columns 3 are connected as a whole, which enhances the stability of the support structure. The top of the two roof plates 4 are fixedly connected to the support plate 5, which directly contacts the top of the roadway and undertakes the support function for the top of the roadway. The roof plate 4 is equipped with a fixing component, which is used to fix the roof plate 4 and the support column 3 to prevent relative movement between the roof plate 4 and the support column 3 during the support process, and ensure the stability of the support. The outer wall of the column 1 is equipped with an adjustment component, which is used to adjust the position of the sliding plate 2 inside the column 1, thereby realizing the height adjustment of the support column 3, roof plate 4 and support plate 5 to meet the support requirements of different roadway heights.

[0035] Reference Figures 3-5 The adjustment assembly includes a housing 7, a rack plate 8, and a rotating shaft 10. The housing 7 is fixedly connected to the outer wall of the column 1, and the rack plate 8 is fixedly connected to the top of the slide plate 2, moving with the slide plate 2. The rotating shaft 10 is rotatably connected to the inner wall of the housing 7, and a worm gear 9 is rotatably connected inside the housing 7. A worm 11 is fixedly connected to the outer wall of the rotating shaft 10. The rotating shaft 10 can rotate within the housing 7, providing power input for the rotation of the worm 11. The rack plate 8 and the worm gear 9 mesh, converting the rotation of the worm gear 9 into the up-and-down movement of the rack plate 8, thereby driving the slide plate 2 and the support column 3 to rise and fall. The worm gear 9 and the worm 11 mesh, utilizing the characteristics of worm gear transmission to achieve power transmission and direction change. A locking assembly is provided at the top of the housing 7, used to lock the rotating shaft 10 after the adjustment assembly has adjusted the support to a suitable height, preventing accidental rotation.

[0036] Reference Figures 3-5The locking assembly includes a housing 12, which is fixedly connected to the top of the housing 7. The housing 12 provides space for the installation and protection of the various components inside the locking assembly. A toothed block 13 is fixedly connected to the inner wall of the housing 12. The toothed block 13 serves as a fixed meshing component and cooperates with a toothed block 16 to achieve the locking function. A pull rod 14 is slidably connected to the inner wall of the housing 12. Two connecting rods 15 are fixedly connected to the outer wall of the pull rod 14. The pull rod 14 can slide axially within the housing 12. Pulling the pull rod 14 moves the connecting rods 15 and the toothed block 16. A second toothed block 16 is fixedly connected between the outer walls of the two connecting rods 15. The second toothed block 16 locks or unlocks the rotating shaft 10 by engaging or disengaging with the first toothed block 13. A first spring 17 is sleeved on the outer wall of the pull rod 14. The first spring 17 applies an elastic force to the pull rod 14. In its natural state, the pull rod 14 is pushed so that the second toothed block 16 is engaged with the first toothed block 13. The engagement between the first toothed block 13 and the second toothed block 16 restricts the rotation of the rotating shaft 10, thereby locking the adjustment component and preventing the support height from changing unexpectedly.

[0037] Reference Figure 2 and Figure 6 The fixing component includes two insert rods 19. The outer wall of the insert rod 19 is slidably connected to the inner wall of the top plate 4. As a key component for fixing, the insert rod 19 is inserted into the support column 3 to fix the top plate 4 to the support column 3. A limit plate 20 is fixedly connected to the outer wall of the insert rod 19. The limit plate 20 restricts the sliding range of the insert rod 19 to prevent the insert rod 19 from falling out of the top plate 4. A second spring 21 is sleeved on the outer wall of the insert rod 19. The second spring 21 applies an elastic force to the limit plate 20, pushing the insert rod 19 into the support column 3 in a natural state to ensure the reliability of the fixing.

[0038] Reference Figure 1 The inner wall of the support plate 5 is equipped with reinforcing ribs 6, which can enhance the structural strength and load-bearing capacity of the support plate 5 and prevent the support plate 5 from deforming or being damaged when subjected to the pressure of the top of the tunnel. The top of the column 1 is fixedly connected with a cone foot, which can make the column 1 more firmly inserted into the soil or rock layer at the bottom of the tunnel and enhance the support stability of the column 1.

[0039] Reference Figure 5 Two grooves 18 are provided on the outer wall of the rotating shaft 10. The outer wall of the connecting rod 15 is slidably connected to the inner wall of the groove 18. The groove 18 provides guidance and space for the sliding of the connecting rod 15, ensuring that the connecting rod 15 can slide stably with the movement of the pull rod 14, without affecting the rotation of the rotating shaft 10. The outer wall of the pull rod 14 is slidably connected to the inner wall of the rotating shaft 10, so that the pull rod 14 can slide within the rotating shaft 10 to adjust the position of the second tooth block 16, without interfering with the rotation function of the rotating shaft 10.

[0040] Reference Figure 5The outer wall of the second tooth block 16 is slidably connected to the inner wall of the outer shell 12. The outer shell 12 provides guidance for the sliding of the second tooth block 16, ensuring that the second tooth block 16 can accurately engage or disengage with the first tooth block 13, thus ensuring the normal operation of the locking component.

[0041] Reference Figure 6 The insertion rod 19 penetrates the top plate 4 and engages with the support column 3. After penetrating the top plate 4, the insertion rod 19 engages with the support column 3, which can firmly connect the top plate 4 and the support column 3 together and prevent relative movement between the two.

[0042] Reference Figure 6 One end of the second spring 21 is fixedly connected to the inner wall of the top plate 4, and the other end of the second spring 21 is fixedly connected to the outer wall of the limiting plate 20. It can apply a stable elastic force to the limiting plate 20, ensuring that the insertion rod 19 can be reliably inserted into the support column 3 in the natural state, thereby fixing the top plate 4 and the support column 3.

[0043] Working principle: When support is needed for coal mine tunneling, the support device is placed in the area to be supported. Then, the cone feet at the bottom of the four columns 1 are inserted into the ground to fix the columns 1. Then, the top plate 4 is placed on top of the two support columns 3. Pull the insertion rod 19 and release it. When the insertion rod 19 is pulled, it will drive the limiting plate 20 to slide, thereby compressing the spring 21 and storing potential energy. When the insertion rod 19 is released, the external force disappears, and the spring 21 will release the stored potential energy, thereby pushing the limiting plate 20 to reset, realizing the locking and fixing of the support columns 3.

[0044] Subsequently, by lifting the pull rod 14 upwards, the connecting rod 15 drives the second toothed block 16 to slide upwards, causing the second toothed block 16 to disengage from the first toothed block 13. At the same time, the first spring 17 is compressed. Then, the pull rod 14 is rotated. When the pull rod 14 rotates, it drives the rotating shaft 10 to rotate through the cooperation of the connecting rod 15 and the slide groove 18, which in turn drives the worm gear 11 to rotate. Since the worm gear 11 is meshed with the worm wheel 9, and the worm wheel 9 is meshed with the rack plate 8, when the worm gear 11 rotates, it drives the rack plate 8 to move up and down through the worm wheel 9, which in turn drives the slide plate 2 to move up and down, thereby driving the support column 3 to move up and down, and adjusting the height of the support plate 5.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A temporary support device for coal mine tunneling, comprising four columns (1), characterized in that: The column (1) is slidably connected to a sliding plate (2), and a support column (3) is fixedly connected to the top of the sliding plate (2). A top plate (4) is fixedly connected between the tops of two distant support columns (3), and a support plate (5) is fixedly connected between the tops of the two top plates (4). A fixing component is provided inside the top plate (4), and an adjustment component is provided on the outer wall of the column (1). The adjustment assembly includes a housing (7), a rack (8), and a rotating shaft (10). The housing (7) is fixedly connected to the outer wall of the column (1). The rack (8) is fixedly connected to the top of the slide plate (2). The rotating shaft (10) is rotatably connected to the inner wall of the housing (7). A worm gear (9) is rotatably connected inside the housing (7). A worm (11) is fixedly connected to the outer wall of the rotating shaft (10). The rack (8) and the worm gear (9) mesh with each other. The worm gear (9) and the worm (11) mesh with each other. A locking assembly is provided on the top of the housing (7).

2. The temporary support device for coal mine tunneling according to claim 1, characterized in that: The locking assembly includes a housing (12), which is fixedly connected to the top of the housing (7). A toothed block (13) is fixedly connected to the inner wall of the housing (12). A pull rod (14) is slidably connected to the inner wall of the housing (12). Two connecting rods (15) are fixedly connected to the outer wall of the pull rod (14). A toothed block (16) is fixedly connected between the outer walls of the two connecting rods (15). A spring (17) is sleeved on the outer wall of the pull rod (14). The toothed block (13) and the toothed block (16) are engaged with each other.

3. The temporary support device for coal mine tunneling according to claim 1, characterized in that: The fixing assembly includes two insert rods (19), the outer wall of the insert rods (19) is slidably connected to the inner wall of the top plate (4), the outer wall of the insert rods (19) is fixedly connected to a limit plate (20), and a spring (21) is sleeved on the outer wall of the insert rods (19).

4. The temporary support device for coal mine tunneling according to claim 2, characterized in that: The inner wall of the support plate (5) is equipped with reinforcing ribs (6), and the top of the column (1) is fixedly connected with a tapered foot.

5. A temporary support device for coal mine tunneling according to claim 2, characterized in that: Two grooves (18) are provided on the outer wall of the rotating shaft (10). The outer wall of the connecting rod (15) is slidably connected to the inner wall of the groove (18), and the outer wall of the pull rod (14) is slidably connected to the inner wall of the rotating shaft (10).

6. The temporary roof support for use in coal mining according to claim 2, characterized in that: The outer wall of the second toothed block (16) is slidably connected to the inner wall of the outer shell (12).

7. The temporary roof support for use in coal mining according to claim 3, characterized in that: The insert (19) passes through the top plate (4) and engages with the support column (3).

8. The temporary roof support for use in coal mining according to claim 3, characterized in that: One end of the second spring (21) is fixedly connected to the inner wall of the top plate (4), and the other end of the second spring (21) is fixedly connected to the outer wall of the limiting plate (20).

Images