Automatic air duct extending device with automatic tensioning function for underground coal mine
By designing an automatic extension device for air ducts under coal mines, the hydraulic winch is used to achieve synchronous installation of the air ducts and wire ropes, and the service life of the lifting ring is improved through the limit slide rail design, the problem of the lack of automatic tightening function and safety hazards in the existing technology stroke barrel extension device has been solved, and automatic installation is achieved and the service life of the equipment is improved.
Patent Information
- Application Number
- CN202411747366.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-02-28
AI Technical Summary
The extension device of the downhole air duct of coal mine lacks automatic tightening function, which causes workers to climb high to install wire ropes and suspended air ducts, which poses safety hazards. In addition, the suspension ring design of the existing automatic suspension device leads to excessive shear force on the non-outlet side and short service life.
An automatic extension device for air duct is designed, including a track cart, air duct storage, hydraulic winch and lifting ring. The hydraulic winch is used to realize the synchronous installation of the wire rope and the air duct. The lifting ring is designed through the limit slide rail of the guide rail cylinder and the air duct storage cylinder to realize the force on the left and right points of the lifting ring and reduce friction.
The automatic synchronous installation of the air tube and the wire rope is realized, which reduces the working time of workers climbing, ensures the straightening state of the wire rope, improves the service life of the air tube storage, and reduces the downhole maintenance.
Smart Images
Figure CN119531923A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of coal mining, in particular to an automatic extension device for a wind tube with an automatic tightening function in a coal mine. Background Art
[0002] At present, the wind tube extension device in my country's coal mines does not have the function of installing wire ropes, and after the wind tube is extended, the wind tube hanging ring cannot be automatically hung on the wire rope. Workers need to climb up to install the wire rope and hang the wind tube, which is time-consuming and labor-intensive, and has certain safety hazards. The wind tube extension device with automatic hanging of the wind tube has a closed hanging ring for hanging the wind tube, and the guide tube where the hanging ring is located can only be fixed on the non-exit side, resulting in excessive shear force on the non-exit side and a short service life. Summary of the invention
[0003] The purpose of the present invention is to provide an automatic extension device for an air supply duct with an automatic tightening function for a coal mine excavation working face.
[0004] The technical solution adopted by the present invention is: an automatic extension device for a wind cylinder with an automatic tightening function in a coal mine, comprising a crawler trolley 2 and a wind cylinder storage 1 and a wire rope 11 installed on the crawler trolley 2, wherein the wind cylinder storage 1 comprises a cylindrical wind cylinder storage body 6, a wind cylinder 5, a wind cylinder storage air outlet section 8, a hydraulic winch 7 installed on the top of the wind cylinder storage air outlet section 8, a wire rope 3 and a lifting ring 4 connected at one end to the hydraulic winch 7 and at the other end to the fixed anchor rod at the wind cylinder overlap, wherein the wind cylinder storage air outlet section 8 is connected to the wind cylinder storage body 6, and the wind cylinder storage body 6 comprises a first semi-cylindrical guard plate and a second semi-cylindrical guard plate, wherein the first semi-cylindrical guard plate comprises a first large semi-cylindrical 61 and a first small semi-cylindrical 63 which are integrally connected, and the second semi-cylindrical guard plate comprises an integrated The second large semi-cylinder 62, the second small semi-cylinder 64, and two parallel plates are connected, the first small semi-cylinder 63 and the second small semi-cylinder 64 form a guide rail cylinder with upper and lower gaps, the first large semi-cylinder 61 and the second large semi-cylinder 62 form a wind cylinder storage cylinder with an upper gap, the lower gap of the guide rail cylinder and the upper gap of the wind cylinder storage cylinder are connected together by two parallel plates, the hanging ring 4 includes a semicircular top rib 41, a circular rib 43, an upper connecting rib 42 connecting the semicircular top rib 41 and the circular rib 43, and a lower connecting rib 44 connecting the circular rib 43 and the wind cylinder 5, each circular rib 43 is in the guide rail cylinder, the upper connecting rib 42 passes through the upper gap of the guide rail cylinder, the lower connecting rib 44 passes through the upper gap of the wind cylinder storage cylinder and the lower gap of the guide rail cylinder, and each circular rib 43 is strung on the wire rope 11.
[0005] The upper parts of the first large semi-cylinder 61 and the first small semi-cylinder 63 are connected via a connecting elbow 9 , and the guide rail cylinder is located in the bending opening of the connecting elbow 9 .
[0006] The lower parts of the first large semi-cylinder 61 and the first small semi-cylinder 63 are connected together and have a support frame at the lower part, and the support frame is installed on the crawler vehicle 2.
[0007] The beneficial effects of the present invention are as follows: 1. The present invention installs a hydraulic winch with a steel wire rope on the wind tube storage device, so that the steel wire rope and the wind tube can be installed synchronously, avoiding the operation process of workers installing the steel wire rope first and then installing the wind tube, and reducing the workers' climbing work time to a certain extent. 2. The hydraulic winch uses the hydraulic source on the crawler trolley to realize the force on both ends of the steel wire rope, ensuring that the steel wire rope is in a straightened state, avoiding the influence of the wind tube on the air supply volume in a drooping state. 3. The guard plates (the first semi-cylindrical guard plate and the second semi-cylindrical guard plate) on the wind tube storage device form a simple limit slide rail (guide rail cylinder), which is less affected by external environmental factors during use, especially the influence of cutting dust on the friction of the slide rail, and the underground maintenance is small. The design of the slide rail and the lifting ring allows the lifting ring to be stressed at two points on the left and right, avoiding the situation of single-sided stress, and the contact between the lifting ring and the slide rail is line contact, which greatly reduces the friction between the two contacts and increases the service life of the storage device. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the wind tube storage device of the present invention; Figure 3 A schematic structural diagram of the air duct storage device (with air duct and without the guard plate) of the present invention; Figure 4 1. It is a schematic cross-sectional view of the main body of the air duct storage device of the present invention (at the hanging ring); Figure 5 It is a schematic diagram of the lifting ring structure; Among them, 1. air cylinder storage, 2. crawler trolley, 3. wire rope, 4. lifting ring, 5. air cylinder, 6. air cylinder storage body, 7. hydraulic winch, 8. air cylinder storage air outlet section, 9. connecting elbow, 41. semicircular top rib, 42. upper connecting rib, 43. circular rib, 44. lower connecting rib, 61. first large semi-cylinder, 62. second large semi-cylinder, 63. first small semi-cylinder, 64. second small semi-cylinder. DETAILED DESCRIPTION
[0009] Figure 1-5 As shown, an automatic extension device for a wind tube with an automatic tightening function in a coal mine comprises a crawler trolley 2, a wind tube storage 1 and a steel wire rope 11 installed on the crawler trolley 2.
[0010] The wind cylinder storage device 1 comprises a cylindrical wind cylinder storage device body 6, a wind cylinder 5, a wind cylinder storage device air outlet section 8, a hydraulic winch 7 installed on the top of the wind cylinder storage device air outlet section 8, a steel wire rope 3 with one end connected to the hydraulic winch 7 and the other end connected to the fixed anchor rod at the wind cylinder overlap.
[0011] The air outlet section 8 of the air cylinder storage device is connected to the air cylinder storage device body 6, and the air cylinder storage device body 6 includes a first semi-cylindrical guard plate and a second semi-cylindrical guard plate, the first semi-cylindrical guard plate includes an integrally connected first large semi-cylinder 61 and a first small semi-cylinder 63, the second semi-cylindrical guard plate includes an integrally connected second large semi-cylinder 62, a second small semi-cylinder 64, and two parallel plates, the first small semi-cylinder 63 and the second small semi-cylinder 64 form a guide cylinder with upper and lower gaps, and the first large semi-cylinder 61 and the second large semi-cylinder 62 form a air cylinder storage cylinder with an upper gap.
[0012] The lower gap of the guide rail cylinder and the upper gap of the wind cylinder storage cylinder are connected together by two parallel plates. The hanging ring 4 includes a semicircular top rib 41, a circular rib 43, an upper connecting rib 42 connecting the semicircular top rib 41 and the circular rib 43, and a lower connecting rib 44 connecting the circular rib 43 and the wind cylinder 5. Each circular rib 43 is in the guide rail cylinder, the upper connecting rib 42 passes through the upper gap of the guide rail cylinder, and the lower connecting rib 44 passes through the upper gap of the wind cylinder storage cylinder and the lower gap of the guide rail cylinder. Each circular rib 43 is strung on the wire rope 11.
[0013] The upper parts of the first large semi-cylinder 61 and the first small semi-cylinder 63 are connected via a connecting elbow 9 , and the guide rail cylinder is located in the bending opening of the connecting elbow 9 .
[0014] The lower parts of the first large semi-cylinder 61 and the first small semi-cylinder 63 are connected together and have a support frame at the lower part, and the support frame is installed on the crawler vehicle 2.
[0015] When the crawler trolley 2 carries the wind tube storage 1 filled with wind tubes 5 and moves to the wind tube overlapping position, first fix the wire rope end on the anchor rod at the overlapping position, and then overlap the wind tube (connected by a quick connector, the wind tube used in the present invention is a foldable wind tube in the prior art, which will not be explained here).
[0016] After the overlap is completed, the crawler trolley 2 moves forward with the wind tube storage 1, and the wind tube 5 begins to slide out of the wind tube storage 1 due to the tension at the overlap, and the lifting ring 4 hanging the wind tube slides out along the guide cylinder at the upper end of the wind tube storage 1. At this time, the hydraulic winch 7 is also in a synchronous rope-releasing state. Since one end of the wire rope 3 is fixed at the anchor rod, the rope-releasing speed of the hydraulic winch at the other end is synchronized with the moving speed of the crawler trolley, and the hydraulic winch feed oil is adjusted to keep the wire rope straight at all times, thereby ensuring that the lifting ring is suspended on the wire rope and does not fall off when sliding out of the guide cylinder. After moving a certain distance, when the wire rope is bent due to the weight of the wind tube and itself, the wire rope is fixed to the exposed anchor rod at the top of the tunnel again, and then the next stage of the wind tube extension work is carried out.
Claims
1. An automatic extension device for a wind tube with an automatic tensioning function in a coal mine, characterized in that: The invention comprises a crawler trolley (2), a wind cylinder storage device (1) mounted on the crawler trolley (2), and a steel wire rope (11); the wind cylinder storage device (1) comprises a cylindrical wind cylinder storage device body (6), a wind cylinder (5), a wind cylinder storage device air outlet section (8), a hydraulic winch (7) mounted on the top of the wind cylinder storage device air outlet section (8), a steel wire rope (3) having one end connected to the hydraulic winch (7) and the other end connected to a fixed anchor rod at a wind cylinder overlapped portion, and a lifting ring (4); the wind cylinder storage device air outlet section (8) is connected to the wind cylinder storage device body (6); the wind cylinder storage device body (6) comprises a first semi-cylindrical guard plate and a second semi-cylindrical guard plate; the first semi-cylindrical guard plate comprises a first large semi-cylinder (61) and a first small semi-cylinder (63) which are integrally connected; the second semi-cylindrical guard plate comprises a second large semi-cylinder (62), a second small semi-cylinder (63) which are integrally connected The invention relates to a suspension ring (4) comprising a first small semi-circular cylinder (63) and a second small semi-circular cylinder (64) forming a guide rail cylinder with upper and lower gaps, the first large semi-circular cylinder (61) and the second large semi-circular cylinder (62) forming a wind cylinder storage cylinder with an upper gap, the lower gap of the guide rail cylinder and the upper gap of the wind cylinder storage cylinder being connected together by two parallel plates, the suspension ring (4) comprising a semi-circular top rib (41), a circular rib (43), an upper connecting rib (42) connecting the semi-circular top rib (41) and the circular rib (43), and a lower connecting rib (44) connecting the circular rib (43) and the wind cylinder (5), each circular rib (43) being located in the guide rail cylinder, the upper connecting rib (42) penetrating the upper gap of the guide rail cylinder, the lower connecting rib (44) penetrating the upper gap of the wind cylinder storage cylinder and the lower gap of the guide rail cylinder, and each circular rib (43) being strung on a steel wire rope (11).
2. The automatic extension device for the wind tube with automatic tightening function in underground coal mines according to claim 1, characterized in that: The upper parts of the first large semi-cylinder (61) and the first small semi-cylinder (63) are connected via a connecting elbow (9), and the guide rail cylinder is located in the curved opening of the connecting elbow (9).
3. The automatic extension device for the wind tube with automatic tightening function in underground coal mines according to claim 1, characterized in that: The lower parts of the first large semi-circular cylinder (61) and the first small semi-circular cylinder (63) are connected together and have a support frame at the lower parts, and the support frame is mounted on the crawler trolley (2).