A mechanical locking and anti-fall device for a mining hydraulic prop

Abstract

This utility model discloses a mechanical locking and anti-fall device for a mining hydraulic prop, within the field of hydraulic prop locking technology. It includes a prop cylinder and a piston rod, with a locking mechanism and a positioning mechanism mounted on the cylinder and piston rod. The locking mechanism includes a pin that passes through the cylinder and piston rod. A fixed post is fixedly mounted on the inner wall of the cylinder, and a sliding post is slidably mounted inside the fixed post. A locking post is fitted to the bottom of the sliding post and inserted into a locking groove within the pin. A fixed rod is inserted inside the sliding post, and a spring is wound around its surface, with one end of the spring connected to the sliding post. This mechanical locking and anti-fall device for the mining hydraulic prop allows for elastic locking using the locking mechanism, facilitating the replacement of the locking unit and avoiding the wear and reduced service life caused by wedge locking, thus improving the practicality and functionality of the device.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic prop locking technology, and in particular to a mechanical locking and anti-fall device for mining hydraulic props. Background Technology

[0002] Hydraulic props are the core equipment for roof support in coal mines. Through a hydraulic transmission system, they are raised, lowered, and locked to support the roof pressure, prevent roof falls and spalling, and ensure the safety of underground operations. They are indispensable support equipment in modern coal mining and are widely used in coal faces, roadway excavation, and chamber support.

[0003] However, existing small hydraulic props use wedge blocks and ear plates with inclined surfaces for wedge locking in their locking units. However, the locking force of this method is limited by the contact area between the wedge block and the ear plate. Under the weight of the prop or the impact load of the top plate, the wedge block is prone to slippage, leading to locking failure. Furthermore, the wedge block wears out quickly and cannot be easily replaced, reducing the practicality of the device. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a mechanical locking and anti-fall device for mining hydraulic supports.

[0005] The purpose of this utility model is achieved as follows: A mechanical locking and anti-fall device for a mining hydraulic support includes: a support cylinder and a piston rod. The support cylinder and piston rod are provided with a locking mechanism and a positioning mechanism. The locking mechanism includes a pin, which is inserted through the support cylinder and piston rod. A fixed column is fixedly installed on the inner wall of the support cylinder. A sliding column is slidably installed inside the fixed column. A locking column is assembled and connected to the bottom end of the sliding column. The locking column is inserted into a locking groove opened inside the pin. A fixed rod is inserted inside the sliding column. A spring is wound around the surface of the fixed rod. One end of the spring is connected to the sliding column. A pull rod is fixedly connected to the side wall of the sliding column.

[0006] Preferably, a damper is fixedly installed on the inner wall of the fixed column, and the other end of the spring is connected to the damper.

[0007] Preferably, a slider is fixedly connected to the side wall of the sliding column, and the slider is slidably disposed inside the sliding groove, which is opened inside the fixed column.

[0008] Preferably, a first flange is fixedly connected to the side wall of the sliding column, and a second flange is fixedly connected to the side wall of the locking column. The first flange and the second flange are assembled and connected by connecting bolts.

[0009] Preferably, the pull rod can slide in a slide rail inside the piston rod body.

[0010] Preferably, the positioning mechanism includes a positioning disk, which is disposed outside the support cylinder body. A support column is fixedly connected to the side wall of the positioning disk. The end of the support column away from the positioning disk is fixedly connected to the outer wall of the support cylinder body. A positioning groove is formed inside the positioning disk, and the pin is inserted into the positioning groove.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model uses a combination of a pin, a fixed column, a sliding column, a locking column, a fixed rod, a spring, a pull rod, and a damper to lock the support column. When the piston rod extends to its maximum extension, the pull rod is pulled to move the sliding column upward, inserting the pin through the support cylinder and the piston rod, so that the locking groove inside the pin and the sliding column are in the same vertical position. When the sliding column is released, the spring is in a compressed and stored state, and the spring force drives the sliding column downward, causing the locking column to engage in the locking groove inside the pin. The mechanical engagement between the pin and the locking column restricts the retraction of the piston rod. This mechanical locking and anti-fall device for mining hydraulic supports can use a locking mechanism for elastic locking, which facilitates the replacement of the locking unit and avoids the wear and reduced service life caused by wedge locking, thus improving the practicality and functionality of the device.

[0012] 2. This utility model, through the cooperation of the positioning plate, positioning groove, and support column, allows the pin to be inserted through the cylinder body and piston rod of the support column. The positioning plate and positioning groove can be used for positioning. When one end of the pin is inserted to the deepest point inside the positioning groove, the locking groove inside the pin and the sliding column are in the same vertical position, which facilitates locking. When the mechanical locking and anti-falling device of this mining hydraulic support column locks the support column, the positioning mechanism can be used for positioning, which facilitates the insertion of the pin, improves the locking speed, and improves the practicality and efficiency of the device. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0014] Figure 1 This is a frontal three-dimensional schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a frontal three-dimensional cross-sectional view of the overall structure of this utility model.

[0016] Figure 3 This is a side-view perspective of the overall structure of the positioning mechanism of this utility model.

[0017] Figure 4 This is a frontal three-dimensional cross-sectional view of the overall structure of the locking mechanism of this utility model.

[0018] In the diagram: 111, support cylinder; 112, piston rod; 2, locking mechanism; 211, pin; 212, fixed column; 213, sliding column; 214, locking column; 215, fixed rod; 216, spring; 217, tie rod; 218, damper; 219, slider; 220, slide groove; 221, first flange; 222, second flange; 223, connecting bolt; 3, positioning mechanism; 311, positioning plate; 312, positioning groove; 313, support column. Detailed Implementation

[0019] 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.

[0020] like Figures 1-4 The present invention provides one embodiment as shown: A mechanical locking and anti-fall device for a mining hydraulic prop. The prop cylinder 111 and piston rod 112 used in this application are products that can be directly purchased on the market. Their principles and connection methods are existing technologies well known to those skilled in the art. It includes: a support cylinder 111 and a piston rod 112. The support cylinder 111 and the piston rod 112 are provided with a locking mechanism 2 and a positioning mechanism 3. The locking mechanism 2 includes a pin 211, which is disposed through the support cylinder 111 and the piston rod 112. A fixed post 212 is fixedly disposed on the inner wall of the support cylinder 111. A sliding post 213 is slidably disposed inside the fixed post 212. A locking post 214 is assembled and connected to the bottom end of the sliding post 213. The locking post 214 is inserted into a locking groove opened inside the pin 211. A fixed rod 215 is inserted inside the sliding post 213. A spring 216 is wound around the surface of the fixed rod 215. One end of the spring 216 is connected to the sliding post 213. A pull rod 217 is fixedly connected to the side wall of the sliding post 213. Using the mechanical locking and anti-fall device of the mining hydraulic support, the support is locked. When the piston rod 112 is extended to its maximum, the pull rod 217 is pulled to drive the sliding column 213 to move upward, so that the pin 211 is inserted through the support cylinder 111 and the piston rod 112, so that the locking groove opened inside the pin 211 and the sliding column 213 are in the same vertical position. When the sliding column 213 is released, the spring 216 is in a compressed and stored state. The elastic force of the spring 216 drives the sliding column 213 to move downward, so that the locking column 214 is engaged in the locking groove opened inside the pin 211. The mechanical engagement between the pin 211 and the locking column 214 restricts the piston rod 112 from retracting.

[0021] A damper 218 is fixedly installed on the inner wall of the fixed column 212, and the other end of the spring 216 is connected to the damper 218. The damper 218 can decompose the potential energy generated by the spring 216, so that the locking pin 214 will not vibrate repeatedly, avoid high wear at the connection between the pin 211 and the locking pin 214, and improve the service life of the pin 211 and the locking pin 214.

[0022] A slider 219 is fixedly connected to the side wall of the sliding column 213. The slider 219 is slidably disposed inside the slide groove 220, which is opened inside the fixed column 212. When the sliding column 213 moves, the slider 219 moves synchronously inside the groove 220, thereby limiting the sliding column 213 and making its sliding more stable.

[0023] A first flange 221 is fixedly connected to the side wall of the sliding column 213, and a second flange 222 is fixedly connected to the side wall of the locking column 214. The first flange 221 and the second flange 222 are assembled and connected by connecting bolts 223. The sliding column 213 and the locking column 214 are assembled and connected by the first flange 221, the second flange 222 and the connecting bolts 223, which makes it easy to disassemble and assemble the sliding column 213 and the locking column 214, and facilitates replacement after the locking column 214 is worn.

[0024] The pull rod 217 can slide in a slide rail inside the piston rod 112.

[0025] The positioning mechanism 3 includes a positioning disk 311, which is disposed outside the support cylinder 111. A support column 313 is fixedly connected to the side wall of the positioning disk 311. The end of the support column 313 away from the positioning disk 311 is fixedly connected to the outer wall of the support cylinder 111. A positioning groove 312 is opened inside the positioning disk 311, and a pin 211 is inserted into the positioning groove 312. When the mechanical locking and anti-fall device of the mining hydraulic support is used, the pin 211 is inserted through the support cylinder 111 and the piston rod 112. The positioning plate 311 and the positioning groove 312 can be used for positioning. When one end of the pin 211 is inserted into the deepest part of the positioning groove 312, the locking groove opened inside the pin 211 and the sliding column 213 are in the same vertical position, which facilitates locking.

[0026] Working principle: Using the mechanical locking and anti-fall device of the mining hydraulic support, the support is locked. When the piston rod 112 is extended to its maximum, the pull rod 217 is pulled to drive the sliding column 213 to move upward, so that the pin 211 is inserted through the support cylinder 111 and the piston rod 112, so that the locking groove opened inside the pin 211 and the sliding column 213 are in the same vertical position. When the sliding column 213 is released, the spring 216 is in a compressed and stored state. The elastic force of the spring 216 drives the sliding column 213 to move downward, so that the locking column 214 is engaged in the locking groove opened inside the pin 211. The mechanical engagement between the pin 211 and the locking column 214 restricts the piston rod 112 from retracting.

[0027] When using the mechanical locking and anti-fall device of the mining hydraulic support, the pin 211 is inserted through the support cylinder 111 and the piston rod 112. The positioning plate 311 and the positioning groove 312 can be used for positioning. When one end of the pin 211 is inserted into the deepest part of the positioning groove 312, the locking groove opened inside the pin 211 and the sliding column 213 are in the same vertical position, which facilitates locking. The operation is then completed.

[0028] The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A mechanical locking and anti-fall device for a mining hydraulic prop, comprising: The support cylinder (111) and piston rod (112) are characterized in that: a locking mechanism (2) and a positioning mechanism (3) are provided on the support cylinder (111) and piston rod (112), the locking mechanism (2) includes a pin (211), the pin (211) is disposed through the inside of the support cylinder (111) and piston rod (112), and a fixing post (212) is fixedly provided on the inner wall of the support cylinder (111), the fixing post (212) sliding inside. A sliding column (213) is provided, and a locking column (214) is assembled and connected to the bottom end of the sliding column (213). The locking column (214) is inserted into a locking groove opened inside the pin (211). A fixing rod (215) is inserted inside the sliding column (213). A spring (216) is wound around the surface of the fixing rod (215). One end of the spring (216) is connected to the sliding column (213). A pull rod (217) is fixedly connected to the side wall of the sliding column (213).

2. The mechanical locking and anti-fall device for a mining hydraulic support according to claim 1, characterized in that: A damper (218) is fixedly installed on the inner wall of the fixed column (212), and the other end of the spring (216) is connected to the damper (218).

3. The mechanical locking and anti-fall device for a mining hydraulic support according to claim 1, characterized in that: The sliding column (213) has a slider (219) fixedly connected to its side wall. The slider (219) is slidably disposed inside the slide groove (220), which is located inside the fixed column (212).

4. The mechanical locking and anti-fall device for a mining hydraulic support according to claim 1, characterized in that: The sliding column (213) is fixedly connected to the side wall of the first flange (221), and the locking column (214) is fixedly connected to the side wall of the second flange (222). The first flange (221) and the second flange (222) are assembled and connected by connecting bolts (223).

5. The mechanical locking and anti-fall device for a mining hydraulic support according to claim 4, characterized in that: The pull rod (217) can slide in a slide rail opened inside the piston rod body (112).

6. The mechanical locking and anti-fall device for a mining hydraulic support according to claim 1, characterized in that: The positioning mechanism (3) includes a positioning disk (311), which is located outside the support cylinder (111). A support column (313) is fixedly connected to the side wall of the positioning disk (311). One end of the support column (313) away from the positioning disk (311) is fixedly connected to the outer wall of the support cylinder (111). A positioning groove (312) is provided inside the positioning disk (311), and the pin (211) is inserted into the positioning groove (312).

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