A telescopic support device for soft coal seam

Abstract

The application relates to a telescopic support device suitable for soft coal seams and belongs to the technical field of support devices, which comprises a contraction box and a support plate, and a contraction groove is arranged in the contraction box. The application is provided with a rotating disc, the rotating disc can drive a transmission rod to rotate, the worm and the worm wheel can be engaged and transmitted, the rotating rod is synchronously driven to rotate, the screw rods at the upper end and the lower end can drive the screw cylinders to slide along the inner wall of the contraction groove, the overall lifting of the mounting frame and the support plate can be realized, the upper screw rod and the lower screw rod do not need to be respectively operated, the height adjusting step is simplified, the adjustment is more convenient, the contraction folding sleeve is arranged, when the screw cylinders drive the mounting frame and the support plate to lift, the contraction folding sleeve is synchronously telescoped, the transmission components such as the screw rods and the screw cylinders in the contraction box can be effectively shielded and protected, and the impurities such as coal cinder and dust outside can be prevented from entering the contraction box to affect the normal operation of the transmission components.

Description

Technical Field

[0001] This application relates to support devices, and more particularly to a retractable sidewall support device suitable for soft coal seams. Background Technology

[0002] For the mining of ultra-low coal seams (ultra-low coal seams are coal seams with a height of less than 1.3 meters), traditional large coal mining equipment is not applicable, and mining can only be carried out manually. Manual mining is carried out step by step along the coal seam channel. During the mining process, there is a risk of ore collapse, so temporary support needs to be built at the mining location.

[0003] A current patent (publication number: CN223256858U) discloses a portable temporary support device for coal mining, including a support body. Threaded sleeves are coaxially arranged at the upper and lower ends of the support body, and screws are threadedly engaged through these sleeves. The upper and lower screws have opposite thread directions, so when the support body rotates to one side, the upper and lower screws move in opposite directions. A support plate is provided at the outer end of each screw. The device can be retracted in height for easy carrying and movement within narrow coal seam channels. After reaching the excavation position, the device can be extended, allowing the upper and lower support plates to support the top and bottom surfaces of the coal seam channel, respectively, providing support for the ore above the channel and mitigating minor collapses, thus protecting the miners.

[0004] While the devices described in the aforementioned comparative documents address the issue of temporary supports using wooden or metal rods, which have a fixed height and cannot effectively adapt to coal seam passages of varying heights, they also suffer from several drawbacks. Firstly, the upper and lower plates cannot be adjusted synchronously; height adjustment requires rotating the upper and lower screws separately, making the process cumbersome. Secondly, the fixed size of the upper and lower plates lacks adjustable support area, hindering their adaptability to coal seam passages of varying widths and causing significant inconvenience. To address these issues, a retractable sidewall support device suitable for soft coal seams is proposed. Utility Model Content

[0005] The purpose of this application is to provide a retractable side support device suitable for soft coal seams, which has the advantages of vertical adjustment function and support area adjustment function. It solves the problems of existing devices that require separate operation of upper and lower screws for height adjustment, which is cumbersome, and the fixed area of ​​the support plate which cannot adapt to coal seam channels of different widths.

[0006] The present application provides a retractable side support device suitable for soft coal seams, which adopts the following technical solution: it includes a shrink box and a support plate, wherein the shrink box is provided with a shrink groove inside;

[0007] Two fixed plates are fixedly connected inside the shrinkage trough. A rotating rod is tightly nested inside the two fixed plates via bearings. Threaded rods are fixedly connected to the top and bottom of the rotating rods. A threaded cylinder is threadedly connected to the surface of the threaded rod. The top of the threaded cylinder slides through the top of the shrinkage box and is fixedly connected to an installation frame. An installation block is fixedly connected to the bottom of the support plate and is installed in the installation frame. A transmission rod is tightly nested inside the shrinkage box via bearings. One end of the transmission rod rotates through the side of the shrinkage box and is fixedly connected to a rotating disk. A worm gear is fixedly connected to the surface of the rotating rod, and a worm is fixedly connected to the surface of the transmission rod. The worm gear and the worm mesh with each other.

[0008] By adopting the above technical solution, a rotating disk is set up. The rotation of the rotating disk can drive the transmission rod to rotate, which can make the worm gear mesh with the worm wheel and drive the rotating rod to rotate synchronously. At this time, the threaded rods at the upper and lower ends will drive the threaded cylinder to slide along the inner wall of the shrinkage groove, thereby realizing the overall lifting and lowering of the mounting frame and support plate. There is no need to operate the upper and lower screws separately, which simplifies the height adjustment steps and makes the adjustment more convenient.

[0009] Preferably, a limiting block is fixedly connected to the surface of the threaded cylinder, and the limiting block is slidably connected within the shrinkage groove;

[0010] By adopting the above technical solution and setting the matching structure of the limit block and the shrinkage groove, the sliding trajectory of the threaded cylinder can be precisely limited, which can prevent the threaded cylinder from rotating or deviating circumferentially during the lifting process, and can ensure that the mounting frame and support plate always maintain a stable vertical lifting state.

[0011] Preferably, a rotating handle is fixedly connected to the side of the rotating disk;

[0012] By adopting the above technical solution and setting a rotating handle, the operator can rotate the rotating disk by holding the rotating handle. Compared with rotating the rotating disk directly, the rotating handle can provide a more comfortable grip point and a more effortless rotation method, making the rotation operation easier and more convenient.

[0013] Preferably, the top and bottom of the shrink box are fixedly connected to shrink folding sleeves, the threaded cylinder is inside the shrink folding sleeves, and one side of the shrink folding sleeve is fixedly connected to the bottom of the mounting frame;

[0014] By adopting the above technical solution and setting a shrinkable folding sleeve, when the threaded cylinder drives the mounting frame and support plate to rise and fall, the shrinkable folding sleeve will expand and contract synchronously, which can effectively shield and protect the transmission components such as the threaded rod and threaded cylinder inside the shrink box, and prevent external impurities such as coal slag and dust from entering the shrink box and affecting the normal operation of the transmission components.

[0015] Preferably, the top of the support plate is provided with grooves on both opposite sides, and an auxiliary plate is slidably connected inside the grooves;

[0016] By adopting the above technical solution and setting a sliding fit structure between the auxiliary plate and the chute, when the support range of the soft coal seam needs to be expanded, the operator slides the auxiliary plate outward from the chute, so that the auxiliary plate and the support plate together form a wider support surface, thereby increasing the support area of ​​the coal seam.

[0017] Preferably, both the mounting frame and the mounting block have positioning holes inside, and a first positioning pin passes through the positioning holes inside the mounting frame and the mounting block.

[0018] By adopting the above technical solution and by setting the matching structure of the positioning hole and the first positioning pin, the relative position of the mounting frame and the mounting block can be fixed after they are connected. When the mounting block is inserted into the mounting frame and adjusted to a suitable position, the first positioning pin passes through the corresponding positioning hole, which can prevent the mounting block from shifting or falling off due to force during use.

[0019] Preferably, positioning holes are provided on both the inner side of the slide and the side of the auxiliary plate, and a second positioning pin is inserted into the positioning holes on both the inner side of the slide and the side of the auxiliary plate.

[0020] By adopting the above technical solution, through the matching structure of the positioning hole and the second positioning pin, the auxiliary plate can be pulled out from the chute and adjusted to the required support width before being fixed. When the auxiliary plate slides to the appropriate position and the chute is aligned with the positioning hole on the auxiliary plate, the second positioning pin is inserted into the positioning hole. This can prevent the auxiliary plate from retracting or sliding due to coal seam pressure or vibration during the support process, and can ensure that the expanded support surface remains stable.

[0021] Preferably, both the top of the support plate and the top of the auxiliary plate are fixedly connected with multiple positioning protrusions;

[0022] By adopting the above technical solution, the positioning protrusions can effectively enhance the friction between the support plate and the auxiliary plate and the coal seam surface. When the device is in contact with the soft coal seam, the positioning protrusions can be embedded in the coal seam surface, increasing the contact area and preventing the support device from sliding under the pressure of the coal seam. This ensures a more reliable support effect for the soft coal seam.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] This retractable side support device, suitable for soft coal seams, features a rotating disc. The rotating disc drives a transmission rod, which in turn engages with a worm gear, causing the rotating rod to rotate synchronously. Simultaneously, the threaded rods at both ends drive a threaded cylinder to slide along the inner wall of the contraction groove, enabling the overall lifting and lowering of the mounting frame and support plate without the need for separate operation of the upper and lower threaded rods. This simplifies height adjustment and makes it more convenient. A contraction folding sleeve extends and retracts synchronously as the threaded cylinder lifts and lowers the mounting frame and support plate, effectively protecting the threaded rods, threaded cylinder, and other transmission components inside the contraction box. This prevents external impurities such as coal slag and dust from entering the contraction box and affecting the normal operation of the transmission components. Furthermore, a sliding fit structure between the auxiliary plate and the chute allows the operator to slide the auxiliary plate outward from the chute when the support area of ​​the soft coal seam needs to be expanded, creating a wider support surface with the support plate, thus increasing the support area for the coal seam. Attached Figure Description

[0025] Figure 1 This is a frontal three-dimensional structural diagram of this application;

[0026] Figure 2 This is a schematic diagram of the structure in frontal cross-section in this application;

[0027] Figure 3 This is a structural schematic diagram of the cross-section of the shrink box in this application;

[0028] Figure 4 This is a schematic diagram of the retractable folding sleeve in this application;

[0029] Figure 5 This is a schematic diagram of the support plate in this application;

[0030] Figure 6 This is a schematic diagram of the auxiliary plate in this application.

[0031] In the diagram: 1. Shrink box; 101. Fixing plate; 102. Rotating rod; 103. Threaded rod; 104. Threaded cylinder; 105. Worm gear; 106. Mounting frame; 107. Transmission rod; 108. Worm; 109. Rotating disk; 1010. Limiting block; 1011. Shrink groove; 1012. Rotating handle; 2. Support plate; 201. Mounting block; 202. Slide groove; 3. Auxiliary plate; 4. Shrink folding sleeve; 5. First positioning pin; 6. Second positioning pin; 7. Positioning hole; 8. Positioning protrusion. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1 - Appendix Figure 6 This application will be described in further detail below.

[0033] Example 1: A retractable side support device suitable for soft coal seams, referring to... Figure 1 , Figure 2 and Figure 3 It includes a shrink box 1 and a support plate 2, and the shrink box 1 has a shrink groove 1011 inside;

[0034] Two fixed plates 101 are fixedly connected inside the shrinkage trough 1011. A rotating rod 102 is tightly nested inside the two fixed plates 101 via bearings. Threaded rods 103 are fixedly connected to the top and bottom of the rotating rod 102. A threaded cylinder 104 is threadedly connected to the surface of the threaded rod 103. The top of the threaded cylinder 104 slides through the top of the shrinkage box 1 and is fixedly connected to a mounting frame 106. A mounting block 201 is fixedly connected to the bottom of the support plate 2 and is mounted on the mounting frame 106. A transmission rod 107 is tightly nested inside the shrinkage box 1 via bearings. One end of the transmission rod 107 rotates through the side of the shrinkage box 1 and is fixedly connected to a rotating... The rotating rod 102 has a worm gear 105 fixedly connected to its surface, and the transmission rod 107 has a worm 108 fixedly connected to its surface. The worm gear 105 and the worm 108 mesh with each other. By setting the rotating rod 109, the rotation of the rotating rod 109 can drive the transmission rod 107 to rotate, which can make the worm 108 mesh with the worm gear 105 for transmission, thereby driving the rotating rod 102 to rotate synchronously. At this time, the threaded rods 103 at the upper and lower ends will drive the threaded cylinder 104 to slide along the inner wall of the shrinkage groove 1011, thereby realizing the overall lifting and lowering of the mounting frame 106 and the support plate 2 without the need to operate the upper and lower threaded rods separately, simplifying the height adjustment steps and making the adjustment more convenient.

[0035] Please see Figure 2 , Figure 3 and Figure 4A limiting block 1010 is fixedly connected to the surface of the threaded cylinder 104. The limiting block 1010 is slidably connected within the shrinkage groove 1011. By setting the cooperation structure between the limiting block 1010 and the shrinkage groove 1011, the sliding trajectory of the threaded cylinder 104 can be precisely limited, preventing the threaded cylinder 104 from rotating or shifting circumferentially during lifting. This ensures that the mounting frame 106 and the support plate 2 always maintain a stable vertical lifting state. A rotating handle 1012 is fixedly connected to the side of the rotating disk 109. By setting the rotating handle 1012, the operator can rotate the rotating disk 109 by holding the rotating handle 1012. Compared with directly rotating the rotating disk 109, the rotating handle... 1012 can provide a more comfortable grip point and a more effortless rotation method, making the rotation operation easier and more convenient. The top and bottom of the shrink box 1 are fixedly connected to shrink folding sleeves 4. The threaded cylinder 104 is located inside the shrink folding sleeve 4. One side of the shrink folding sleeve 4 is fixedly connected to the bottom of the mounting frame 106. By setting the shrink folding sleeve 4, when the threaded cylinder 104 drives the mounting frame 106 and the support plate 2 to rise and fall, the shrink folding sleeve 4 will extend and retract synchronously. It can effectively shield and protect the transmission components such as the threaded rod 103 and the threaded cylinder 104 inside the shrink box 1, and prevent external impurities such as coal slag and dust from entering the shrink box 1 and affecting the normal operation of the transmission components.

[0036] Please see Figure 4 , Figure 5 and Figure 6The support plate 2 has grooves 202 on both sides of its top. An auxiliary plate 3 is slidably connected inside the grooves 202. By setting up a sliding fit structure between the auxiliary plate 3 and the grooves 202, when the support range of the soft coal seam needs to be expanded, the operator slides the auxiliary plate 3 outward from the grooves 202, so that the auxiliary plate 3 and the support plate 2 together form a wider support surface, thereby increasing the support area of ​​the coal seam. Both the mounting frame 106 and the mounting block 201 have positioning holes 7 inside. A first positioning pin 5 passes through the positioning holes 7 inside both the mounting frame 106 and the mounting block 201. By setting up a fit structure between the positioning holes 7 and the first positioning pin 5, the relative positions of the mounting frame 106 and the mounting block 201 can be fixed after they are connected. When the mounting block 201 is inserted into the mounting frame 106 and adjusted... When the slide 201 is aligned to the appropriate position, the first positioning pin 5 is passed through the corresponding positioning hole 7 to prevent the mounting block 201 from shifting or falling off due to force during use. Positioning holes 7 are provided on the inner side of the slide 202 and the side of the auxiliary plate 3. The second positioning pin 6 is inserted through the positioning holes 7. Through the cooperation structure of the positioning holes 7 and the second positioning pin 6, the auxiliary plate 3 can be pulled out from the slide 202 and adjusted to the required support width, and then the two can be fixed. When the auxiliary plate 3 slides to the appropriate position and the slide 202 is aligned with the positioning hole 7 on the auxiliary plate 3, the second positioning pin 6 is inserted into the positioning hole 7. This can prevent the auxiliary plate 3 from retracting or sliding due to coal seam pressure or vibration during the support process, and can ensure that the expanded support surface remains stable.

[0037] Please see Figure 5 and Figure 6 Multiple positioning protrusions 8 are fixedly connected to the top of the support plate 2 and the top of the auxiliary plate 3. The positioning protrusions 8 can effectively enhance the friction between the support plate 2 and the auxiliary plate 3 and the coal seam surface. When the device is in contact with the soft coal seam, the positioning protrusions 8 can be embedded in the coal seam surface, increasing the contact area and preventing the support device from sliding under the pressure of the coal seam. This ensures a more reliable support effect for the soft coal seam.

[0038] The implementation principle of this application embodiment is as follows: When using the support device, firstly, the shrink box 1 is fixed at the base position of the area to be supported, and then the support plate 2 is installed in place by the cooperation of the mounting block 201 and the mounting frame 106, and the first positioning pin 5 is inserted through the positioning hole 7 to complete the fixation.

[0039] When the height of the support plate 2 needs to be adjusted to adapt to different coal seam heights, the operator holds the rotating handle 1012 and rotates the rotating disk 109. The rotating disk 109 drives the transmission rod 107 and the worm gear 108 to rotate. The worm gear 108 meshes with the worm wheel 105 to drive the rotating rod 102 to rotate, which in turn drives the threaded rods 103 at the upper and lower ends to rotate synchronously. At this time, the threaded cylinder 104 rises and falls smoothly along the inner wall of the shrinkage groove 1011 under the guidance of the limit block 1010, which drives the mounting frame 106 and the support plate 2 to achieve vertical height adjustment. At the same time, the shrinkage folding sleeve 4 expands and contracts synchronously with the rise and fall of the threaded cylinder 104, which can effectively protect the transmission components inside the shrinkage box 1.

[0040] If it is necessary to expand the support width, the auxiliary plate 3 can be pulled out from the chute 202. After adjusting to the required width, the chute 202 is aligned with the positioning hole 7 on the auxiliary plate 3. The second positioning pin 6 is then inserted to complete the fixation. At this time, the positioning protrusion 8 on the top of the support plate 2 and the auxiliary plate 3 are in contact with the coal seam surface. The device is prevented from slipping by increasing the friction and embedding into the coal seam surface.

[0041] Throughout the support process, the limit block 1010 ensures that the threaded cylinder 104 does not rotate circumferentially, and the worm gear 105 and worm 108 transmission structure ensure the stability of the lifting and adjusting.

Claims

1. A retractable side support device suitable for soft coal seams, comprising a retractable box (1) and a support plate (2), characterized in that: The shrink box (1) has a shrink groove (1011) inside. The shrinkage groove (1011) is internally fixedly connected to two fixing plates (101). A rotating rod (102) is tightly nested inside the two fixing plates (101) via bearings. Threaded rods (103) are fixedly connected to both the top and bottom of the rotating rod (102). A threaded cylinder (104) is threaded onto the surface of the threaded rod (103). The top of the threaded cylinder (104) slides through the top of the shrinkage box (1) and is fixedly connected to an mounting frame (106). A mounting frame (106) is fixedly connected to the bottom of the support plate (2). Mounting block (201) is installed and connected to mounting frame (106). The inner side of shrink box (1) is tightly nested with transmission rod (107) through bearing. One end of transmission rod (107) rotates through the side of shrink box (1) and is fixedly connected to rotating disk (109). Worm wheel (105) is fixedly connected to the surface of rotating rod (102). Worm (108) is fixedly connected to the surface of transmission rod (107). Worm wheel (105) and worm (108) mesh with each other.

2. The retractable side support device suitable for soft coal seams according to claim 1, characterized in that: The threaded cylinder (104) is fixedly connected to a limiting block (1010), which is slidably connected in the shrinkage groove (1011).

3. A retractable side support device suitable for soft coal seams according to claim 1, characterized in that: A rotating handle (1012) is fixedly connected to the side of the rotating disk (109).

4. A retractable side support device suitable for soft coal seams according to claim 1, characterized in that: The top and bottom of the shrink box (1) are fixedly connected to shrink fold sleeves (4), the threaded cylinder (104) is inside the shrink fold sleeves (4), and one side of the shrink fold sleeves (4) is fixedly connected to the bottom of the mounting frame (106).

5. A retractable side support device suitable for soft coal seams according to claim 1, characterized in that: The support plate (2) has grooves (202) on both sides of its top, and an auxiliary plate (3) is slidably connected inside the grooves (202).

6. A retractable side support device suitable for soft coal seams according to claim 1, characterized in that: The mounting frame (106) and the mounting block (201) are both provided with positioning holes (7), and the positioning holes (7) provided with the mounting frame (106) and the mounting block (201) are provided with first positioning pins (5).

7. A retractable side support device suitable for soft coal seams according to claim 5, characterized in that: The inner side of the slide (202) and the side of the auxiliary plate (3) are provided with positioning holes (7), and a second positioning pin (6) is inserted inside the positioning holes (7).

8. A retractable side support device suitable for soft coal seams according to claim 1, characterized in that: Multiple positioning protrusions (8) are fixedly connected to the top of the support plate (2) and the top of the auxiliary plate (3).

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