An anti-impact device for underground ore discharge hoppers

Abstract

This utility model discloses an anti-impact device for an underground ore discharge hopper, relating to the field of underground ore unloading technology. It includes a main support frame, inside which is an electro-hydraulic actuator body. A sealing plate is fixedly connected to one closed side of the main support frame. A corrugated wave plate is fixedly connected to the bottom end of the sealing plate near the main support frame. A buffer ore slide plate is located at the top of the corrugated wave plate inside the main support frame. The buffer ore slide plate is used to prevent personnel from being impacted by ore. This utility model uses the electro-hydraulic actuator body, along with an overflow valve and a hydraulically controlled check valve to form a hydraulic control system, achieving push-pull self-locking, stepless speed adjustment, and multi-angle working modes. Its fully enclosed structure can resist ore impact, and it is small in size, leak-proof, and suitable for confined underground spaces.

Description

Technical Field

[0001] This utility model relates to the field of underground ore unloading technology, and in particular to an anti-impact device for an underground ore discharge hopper. Background Technology

[0002] An underground ore discharge funnel is a channel used for unloading ore underground. It is a vertical or inclined channel device connecting the transport roadway and the stope, achieving directional discharge of ore through gravity or mechanical assistance. The ore slides down the inclined surface of the funnel under its own weight, with the inclination angle typically maintained at 45-55 degrees. This angle is designed based on the ore's natural angle of repose and flow characteristics to ensure smooth sliding and reduce blockages.

[0003] However, in the existing use of underground ore discharge funnels, manual placement of wooden planks is required for stopping the discharge. Because the ore in the funnel must never be empty, and the ore's fall during discharge relies entirely on its own weight, there is a significant risk of ore impact during manual stopping. When manually placing the planks, workers must be in close proximity to the funnel opening. If a void forms inside the funnel, ore may suddenly surge out, burying or striking workers and causing serious injury or death.

[0004] To address the significant risk of ore impact during manual ore discharge, a mechanical gate device was designed to withstand such impacts. Due to the confined space of the underground funnel area, an electro-hydraulic actuator, integrating power and actuation components, was used. To prevent personnel from being impacted by ore, after the gate is fully opened, power is supplied to the ore discharge vibrator after a 3-second delay via a time relay. Ore is then discharged after a safety delay. When ore discharge ceases, the vibrator stops first, then a certain amount of ore is released after a time delay via the time relay before the gate closes. The electro-hydraulic actuator, with its fully hydraulic transmission, is connected to a hydraulic control system via an overflow valve and a hydraulically controlled check valve, enabling push-pull self-locking, stepless speed adjustment, and multi-angle operating modes. Its fully enclosed structure resists ore impacts, is compact, leak-proof, and suitable for confined underground spaces.

[0005] However, existing underground ore discharge hoppers may accumulate ore. Clogged hoppers can directly cause the entire mine's coal extraction system to stop operating. Furthermore, when manually clearing blockages, workers must be in close proximity to the hopper opening, facing the risk of ore suddenly slipping down. Utility Model Content

[0006] The purpose of this utility model is to overcome the shortcomings of the existing technology and propose an anti-impact device for underground ore discharge hoppers, which solves the problem that there is a high possibility of being hit by ore during the process of manually stopping ore discharge.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An anti-impact device for an underground ore discharge hopper includes a main support frame. An electro-hydraulic actuator body is disposed inside the main support frame. A sealing plate is fixedly connected to one closed side of the main support frame. A corrugated plate is fixedly connected to the bottom end of the sealing plate near the main support frame. A buffer ore slide plate is disposed at the top of the corrugated plate inside the main support frame. The buffer ore slide plate is used to prevent personnel from being impacted by ore. The electro-hydraulic actuator body ensures that the buffer ore slide plate provides a cushioning effect against the ore. Furthermore, the electro-hydraulic actuator body also ensures that in the event of a power outage, it self-locks to prevent the gate from malfunctioning and to prevent accidental ore slippage.

[0009] As a further improvement of this utility model, two side splash guards are symmetrically fixedly connected to both sides of the main support frame, and a top splash guard is fixedly connected to the top of the main support frame. A through rod is fixedly connected to the top of the inner wall of the main support frame, and one end of the electro-hydraulic actuator body is rotatably connected to the center of the outer surface of the through rod. This ensures the connection between the upper and lower ends of the buffer ore slide plate.

[0010] As a further improvement of this utility model, a second through rod is rotatably connected inside the electro-hydraulic actuator body at the end away from the first through rod. Two hinged brackets are symmetrically fixedly connected to both ends of the second through rod. The upper sides of the hinged brackets are symmetrically rotatably connected to the top two sides of the buffer ore slide plate. The hinged brackets allow the electro-hydraulic actuator body to swing freely within a range of ±15°, thereby adapting to changes in the tilt angle of the buffer ore slide plate.

[0011] As a further improvement of this utility model, a through rod three is rotatably connected through the lower center of the hinge bracket one. Two hinge brackets two are symmetrically fixedly connected to both ends of the through rod three. The upper parts of the hinge brackets two are symmetrically and securely fastened to the bottom sides of the buffer ore slide plate. A through rod four is rotatably connected through the lower center of the hinge brackets two. The rotatable connection of the through rod four allows the buffer ore slide plate to move continuously.

[0012] As a further improvement of this utility model, tempered glass is fixedly connected inside the sealing plate, and a protective frame is fixedly connected to the side of the sealing plate away from the main support frame. An infrared detector is installed on the side of the tempered glass away from the main support frame, and a signal transmission device is installed on the side of the infrared detector away from the tempered glass. The infrared detector and the signal transmission device enable the detection of accumulated ore.

[0013] As a further improvement of this utility model, the signal transmission device is fixedly connected to the side of the enclosed plate away from the main support frame. A connecting line is fixedly connected to the side of the signal transmission device away from the infrared detector. A telescopic motor is fixedly connected to the end of the connecting line away from the signal transmission device. A telescopic rod is fixedly connected to the output end of the telescopic motor. The telescopic rod is inserted through the surface of the enclosed plate. Two fixing plates are symmetrically fixedly connected to the side of the telescopic motor near the enclosed plate. Both fixing plates are fixedly connected to the surface of the enclosed plate. The telescopic motor and telescopic rod are used to quickly clear blockages when ore accumulates.

[0014] Compared with the prior art, the advantages of this utility model are as follows:

[0015] 1. The electro-hydraulic actuator body, along with a hydraulic control system comprised of an overflow valve and a hydraulically controlled check valve, enables push-pull self-locking, stepless speed adjustment, and multi-angle working modes. Its fully enclosed structure resists ore impact, and its small size and oil-free operation make it suitable for confined underground spaces.

[0016] 2. Through the buffer ore slide plate, hinged bracket one and hinged bracket two, the first stage of kinetic energy conversion is formed, which converts the vertical impact force into the rotational kinetic energy of the bracket, thereby greatly reducing the peak value of the initial impact force.

[0017] 3. The reciprocating extension and retraction of the telescopic rod, along with its motor, clears the ore accumulated at the top of the corrugated plate, thus preventing blockage. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a three-dimensional structural diagram of the electro-hydraulic actuator body, the pleated wave plate, and the buffer ore slide plate in this utility model.

[0020] Figure 3 This is a three-dimensional structural diagram of the protective frame, the sealing plate, and the tempered glass in this utility model.

[0021] Figure 4 This utility model Figure 3 A schematic diagram of the cross-sectional three-dimensional structure of the central protective frame and 20.

[0022] In the diagram: 101. Main support frame; 102. Top splash guard; 103. Side splash guard; 104. Corrugated wave plate; 105. Through rod one; 106. Electro-hydraulic actuator body; 107. Through rod two; 108. Hinge bracket one; 109. Through rod three; 110. Hinge bracket two; 111. Through rod four; 112. Buffer ore slide plate; 201. Protective frame; 202. Enclosure plate; 203. Tempered glass; 204. Telescopic rod; 205. Infrared probe; 206. Signal transmission device; 207. Connecting line; 208. Telescopic motor; 209. Fixing plate. Detailed Implementation

[0023] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0025] See attached document Figure 1 -Appendix Figure 4 An anti-impact device for an underground ore discharge hopper includes a main support frame 101, a corrugated plate 104, an electro-hydraulic actuator body 106, a hinged bracket one 108, a hinged bracket two 110, a buffer ore slide plate 112, a telescopic rod 204, an infrared probe 205, a signal transmission device 206, and a telescopic motor 208.

[0026] In this embodiment, taking the ore falling into the funnel as an example, the present invention first uses an electro-hydraulic actuator body 106, an integrated power and actuation device. To prevent personnel from being impacted by the ore, after the gate is fully opened, power is supplied to the ore discharge vibrator after a 3-second delay via a time relay. At this time, the ore is discharged under a safe delay. When stopping the ore discharge, the vibrator first stops working, then releases a certain amount of ore after a delay via a time relay, and then closes the gate. The 3-second delay mechanism ensures that the vibrator only starts after the gate is fully open, forming a physical isolation zone to avoid splashing impact caused by equipment resonance in the initial stage of ore flow, and to ensure a safe distance for the operators.

[0027] At the inflection point of the funnel's descent, a buffer ore slide plate 112 prevents a large amount of ore from instantly destroying the bottom of the funnel. This is achieved through the rotation of hinged brackets 108 and 110, which are connected in series via through rods 107, 109, and 111. The electro-hydraulic actuator body 106 then rotates and fixes the main support frame 101 and through rod 107 to the main support frame 107. This provides auxiliary buffering during ore descent when the electro-hydraulic actuator body 106 is activated. A corrugated wave plate 104 is installed below the inflection point to prevent instantaneous ore slippage, ensuring that ore only slips out when the vibrator is working and that ore movement is minimal when the vibrator stops. The buffer ore slide plate 112, through hinged brackets 108 and 110, forms the first stage of kinetic energy conversion, transforming the vertical impact force into the rotational kinetic energy of the support. Actual measurements show that this reduces the initial peak impact force by up to 62%. The corrugated wave plate 104 constitutes the second stage of resistance control. Its special curved surface design increases the sliding friction coefficient of the ore to 0.45, effectively absorbing residual kinetic energy. The four-bar linkage mechanism composed of the electro-hydraulic actuator body 106 and the through rod system realizes the stepless adjustment of the slide angle by ±15°. Combined with the vibration frequency, it forms a closed-loop control, keeping the standard deviation of the ore flow velocity within 0.3m / s.

[0028] When ore becomes blocked above the corrugated plate 104, the infrared probe 205 detects the ore on the side of the tempered glass 203. When the ore is detected at the horizontal position of the side splash guard 103, it means that the ore is blocking the top of the corrugated plate 104. At this time, the signal transmission device 206 connected to the infrared probe 205 transmits the signal to the connecting line 207, and the connecting line 207 outputs a start signal to the telescopic motor 208. The start of the telescopic motor 208 will drive the telescopic rod 204 to reciprocate. Since the telescopic rod 204 and the corrugated plate 104 are in the same horizontal direction, the reciprocating extension and retraction of the telescopic rod 204 will clear the ore accumulated at the top of the corrugated plate 104. This achieves the effect of preventing the ore from blocking the top of the corrugated plate 104. The infrared probe 205 uses 940nm wavelength non-visible light detection (to avoid ambient light interference), and the light transmittance of the tempered glass 203 is ≥92% to ensure detection accuracy.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An impact protection device for an ore pass chute, comprising a main support frame (101), characterized in that, An electro-hydraulic actuator body (106) is provided inside the main support frame (101). A sealing plate (202) is fixedly connected to one closed side of the main support frame (101). A corrugated wave plate (104) is fixedly connected to the bottom end of the sealing plate (202) near the main support frame (101). A buffer ore slide plate (112) is provided inside the main support frame (101) at the top of the corrugated wave plate (104). The buffer ore slide plate (112) is used to prevent personnel from being impacted by ore.

2. A shock absorbing device for a mine discharge chute according to claim 1, characterised in that Two side splash guards (103) are symmetrically fixedly connected to both sides of the main support frame (101), and a top splash guard (102) is fixedly connected to the top of the main support frame (101). A through rod (105) is fixedly connected to the top of the inner wall of the main support frame (101), and one end of the electro-hydraulic push rod body (106) is rotatably connected to the center of the outer surface of the through rod (105).

3. A shock absorbing device for a mine discharge chute according to claim 2, wherein The electro-hydraulic actuator body (106) is internally rotatably connected to a second through rod (107) at the end away from the first through rod (105). The two ends of the second through rod (107) are symmetrically fixedly connected to two hinge brackets (108). The top of the hinge brackets (108) is symmetrically rotatably connected to the top two sides of the buffer ore slide plate (112).

4. The anti-impact device for an underground ore discharge hopper according to claim 3, characterized in that, A through rod three (109) is rotatably connected through the lower center of the hinge bracket one (108). Two hinge brackets two (110) are symmetrically fixed at both ends of the through rod three (109). The upper sides of the hinge brackets two (110) are symmetrically and securely connected to the bottom sides of the buffer ore slide plate (112). A through rod four (111) is rotatably connected through the lower center of the hinge brackets two (110).

5. The anti-impact device for an underground ore discharge hopper according to claim 1, characterized in that, Tempered glass (203) is fixedly connected inside the enclosed plate (202). A protective frame (201) is fixedly connected to the side of the enclosed plate (202) away from the main support frame (101). An infrared detector (205) is provided on the side of the tempered glass (203) away from the main support frame (101). A signal transmission device (206) is provided on the side of the infrared detector (205) away from the tempered glass (203).

6. The anti-impact device for an underground ore discharge hopper according to claim 5, characterized in that, The signal transmission device (206) is fixedly connected to the side of the enclosed plate (202) away from the main support frame (101). A connecting line (207) is fixedly connected to the side of the signal transmission device (206) away from the infrared probe (205). A telescopic motor (208) is fixedly connected to the end of the connecting line (207) away from the signal transmission device (206). A telescopic rod (204) is fixedly connected to the output end of the telescopic motor (208). The telescopic rod (204) is inserted through the surface of the enclosed plate (202). Two fixing plates (209) are symmetrically fixedly connected to the side of the telescopic motor (208) near the enclosed plate (202). The fixing plates (209) are all fixedly connected to the surface of the enclosed plate (202).

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