A conveying device for copper ore filling materials used in mining

Abstract

The present invention relates to the field of mining, and specifically to a conveying device for copper ore filling materials used in mining. It comprises a bracket, a conveying cylinder, a conveying mechanism, and an adjusting mechanism; the conveying mechanism comprises a main shaft, conveying blades, a sleeve, and a conveying pipe; and the conveying blades are spiral elastic sheets. When the filling material is filled into a fixed closed area through the conveying pipe and the remaining space in the goaf is less than a preset value, the driving sleeve drives the front end of the conveying blade to move backward through the connecting assembly, and pushes the conveying blade, so that the pitch of the conveying blade is reduced, thereby adjusting the speed of conveying the filling material to the goaf according to the change in the size of the remaining space. When the filling material is filled into the fixed closed area, it avoids excessive filling speed, which may cause damage to the closed plate wall and other structures of the fixed closed area due to a large extrusion force, and avoids overflow of the filling material and causing waste.

Description

Technical Field

[0001] The present invention relates to the field of mining, and in particular to a conveying device for copper ore filling materials used in mining. Background Art

[0002] During copper mining, the rock mass beneath the mine, before excavation, remains in equilibrium under the weight of the overlying strata and other forces, a state known as the original stress equilibrium. Once the rock mass is excavated or nearby excavation projects occur, this original stress equilibrium is disrupted. To maintain both stress and ecological balance, fill materials are typically used to fill the mined-out areas to support the surrounding rock and maintain its stability. Fill materials can be categorized by particle size into rock (waste rock), crushed stone (coarse aggregate), ground sand (including Gobi aggregate), natural sand (river sand and sea sand), and desludged tailings. Fill materials can also be classified by mechanical properties, depending on whether the fill exhibits true cohesion, into non-cemented and cemented fill materials. All of the aforementioned fill materials can be considered non-cemented fill materials. However, tailings, due to their high fine particle content, are difficult to dehydrate and present a risk of re-liquefaction under dynamic loads such as blasting. Therefore, under current engineering technology, full tailings fillers generally require the addition of cement or other binders to create a cemented filler before filling. To ensure effective filling, tailings and other fillers, which contain many fine particles and are difficult to dehydrate, are first mixed with cement. The tunnels, copper ore chutes, and outlets leading to the voids are then securely sealed. The uniformly mixed cemented filler is then conveyed through a conveyor system into the voids, such as the mine rooms, to complete the filling process.

[0003] In the prior art, for example, a Chinese patent application with publication number CN206897226U, entitled "A Conveying Device for Coal Filling Materials for Mining," discloses a technical solution comprising a screw conveyor, a conveyor wheel, a conveying motor, an output track, a control panel, a monitoring cover, a mixing bin, a hopper, an automatic loading structure, a stirring rod, a rotating shaft, a stirring plate, a coupling, a mixing bin motor, rollers, a chassis, and a lighting fixture. The output track is located at the bottom of the screw conveyor. This solution achieves integrated material mixing and conveying, effectively mixing the filling material. After the filling material is stirred, the conveyor wheel and the conveyor motor drive the screw conveyor to rotate, allowing the mixed coal filling material to be delivered to the goaf via the output track for filling. However, when using a closed method, as the remaining space in the closed goaf decreases, this solution cannot adjust the filling material delivery rate according to the changes in the remaining space. When the filling material is filled into the fixed enclosure, the gel-like filling material may significantly impact the sealing wall and other structures of the fixed enclosure, potentially damaging the enclosure and causing the filling material to overflow and cause waste. Summary of the Invention

[0004] The present invention provides a conveying device for copper ore filling materials used in mining to solve the above problems.

[0005] The present invention provides a conveying device for copper ore filling materials for mining, which adopts the following technical solution: a conveying device for copper ore filling materials for mining, comprising a bracket, a conveying drum, a conveying mechanism, and an adjusting mechanism; the bracket is arranged front and back; the axis of the conveying drum is arranged front and back and fixed on the bracket; a feed port is provided at the rear end of the conveying drum; the conveying mechanism comprises a main shaft, conveying blades, a sleeve, and a conveying pipe; the main shaft is coaxially and rotatably arranged in the conveying drum; the conveying blades are spiral elastic sheets, which are arranged front and back and slidably sleeved on the main shaft, and the rear end is fixedly installed at the rear end of the main shaft; the sleeve is coaxially arranged outside the conveying drum and slidably installed on the conveying drum; the front end of the conveying pipe extends into the copper ore goaf, and the rear end is fixed on the bracket and slidably cooperates with the sleeve; a connecting component is provided between the sleeve and the conveying blades;

[0006] The adjustment mechanism is configured such that when the filling material is filled into the fixed closed area through the conveying pipe and the remaining space in the goaf is less than a preset value, the driving sleeve drives the front end of the conveying blade to move backward through the connecting assembly, pushing the conveying blade, so that the pitch of the conveying blade decreases, thereby adjusting the rate of conveying the filling material to the goaf according to the change in the remaining space. The adjustment mechanism includes a trigger assembly and a driving assembly; the trigger assembly includes a contact plate, a fixed plate, and a trigger hydraulic cylinder; the fixed plate is fixed to the outside of the closed plate wall; a plurality of trigger hydraulic cylinders are provided and evenly fixed on the fixed plate; the piston rod of the trigger hydraulic cylinder passes through the closed plate wall and enters the goaf; the contact plate is hinged to the movable end of the piston rod of the trigger hydraulic cylinder; the driving assembly includes a driving hydraulic cylinder and a conversion structure; the driving hydraulic cylinder is vertically fixed to the bracket; the driving hydraulic cylinder and the trigger hydraulic cylinder are connected by an oil pipe; the conversion structure is used to drive the oil pressure in the trigger hydraulic cylinder to enter the driving hydraulic cylinder when the filling material is filled into the fixed closed area through the conveying pipe and pushes the contact plate, so that when the piston rod of the driving hydraulic cylinder is extended, the extension amount of the driving hydraulic cylinder piston rod is converted into the displacement amount of the sleeve sliding on the conveying cylinder. It is used to convert the pressure of the filling material in the closed goaf on the contact plate into the displacement of the sleeve as the remaining space in the goaf gradually becomes smaller, so that the elastic conveying blades are gradually compressed to reduce the pitch and reduce the rate of conveying the filling material to the goaf.

[0007] The conversion structure further includes a conversion wheel and a slide rod; the slide rod is arranged in a front-to-rear manner and rotatably mounted on a bracket; a slider is provided on the slide rod; a ball screw is coupled between the slider and the slide rod; the slider is fixedly connected to a sleeve; the conversion wheel is sleeved on the piston rod of the driving hydraulic cylinder and coupled with the piston rod of the driving hydraulic cylinder via a ball screw; the conversion wheel is rotatably mounted on the bracket; a one-way transmission assembly is used to achieve one-way transmission between the conversion wheel and the slide rod. This is used to prevent the sleeve from sliding relative to the conveying cylinder due to the compressive force of the filling material in the conveying cylinder on the conveying blades.

[0008] Furthermore, the one-way transmission assembly includes a worm gear and a worm; the worm gear is fixedly mounted on the slide rod; the worm gear is vertically arranged and rotatably mounted on the bracket; the worm gear and the worm gear are meshed; and the worm gear and the conversion wheel are meshed and driven via an intermediate wheel. Utilizing the one-way transmission characteristics of the worm gear and the worm gear, the filling material is conveyed more stably.

[0009] Furthermore, the connecting assembly includes a collar and a mounting ring; the collar is slidably mounted on the front end of the main shaft; the collar is connected to the front end of the conveying blade; the mounting ring is rotatably mounted on the inner wall of the sleeve; and the mounting ring and the collar are fixedly connected by a connecting rod. While supporting the rotation of the main shaft, it also compresses the conveying blade when the sleeve slides.

[0010] Furthermore, a power motor is fixedly mounted on the bracket, and a belt is used to transmit power between the output shaft of the power motor and the main shaft, so as to provide rotational force for the main shaft.

[0011] Furthermore, a buffer spring is provided between the contact plate and the closing plate wall to prevent the filling material from pushing the contact plate too quickly, causing the regulating mechanism to adjust the speed of conveying the filling material to the goaf too quickly, thereby reducing the filling efficiency.

[0012] Furthermore, the sliding connection between the delivery tube and the sleeve is in the shape of a venturi tube, which is used to increase the delivery speed of the filling material from the delivery cylinder into the delivery tube and improve the early filling efficiency.

[0013] The beneficial effect of the present invention is that when the filling material is filled into the fixed closed place through the conveying pipe and the remaining space in the goaf is less than the preset value, the adjusting mechanism drives the sleeve to move the front end of the conveying blade backward through the connecting component, and pushes the conveying blade, so that the pitch of the conveying blade is reduced, thereby adjusting the rate of conveying the filling material to the goaf according to the change in the size of the remaining space. When the filling material is filled into the fixed closed place, it avoids excessive filling speed and the resulting damage to the closed plate wall and other structures of the fixed closed place due to a large extrusion force, and avoids overflow of the filling material and waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a schematic structural diagram of an embodiment of a conveying device for copper ore filling materials for mining use according to the present invention;

[0016] Figure 2 A top view of an embodiment of the present invention;

[0017] Figure 3 A side view of an embodiment of the present invention;

[0018] Figure 4 A schematic structural diagram of another angle of view of an embodiment of the present invention;

[0019] Figure 5 A schematic structural diagram of a conveying cylinder, a conveying mechanism, and a sleeve according to an embodiment of the present invention;

[0020] Figure 6 It is a cross-sectional view of the conveying cylinder, conveying mechanism and sleeve according to an embodiment of the present invention.

[0021] In the figure: 100, bracket; 200, conveying cylinder; 300, conveying mechanism; 310, main shaft; 320, conveying blade; 330, sleeve; 340, conveying pipe; 351, collar; 352, mounting ring; 400, adjusting mechanism; 411, contact plate; 412, fixing plate; 413, triggering hydraulic cylinder; 421, driving hydraulic cylinder; 422, conversion wheel; 423, slide rod; 424, slider; 431, worm gear; 432, worm. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] An embodiment of a conveying device for copper ore filling materials for mining of the present invention is as follows Figures 1 to 6 As shown: a conveying device for copper ore filling materials used in mining, comprising a bracket 100, a conveying cylinder 200, a conveying mechanism 300, and an adjusting mechanism 400. The bracket 100 is arranged front and back.

[0024] The conveying cylinder 200 is fixed on the bracket 100 in a front-to-back arrangement. A feed port is provided at the rear end of the conveying cylinder 200 for docking with the discharge port of the stirring and mixing device.

[0025] The conveying mechanism 300 includes a main shaft 310, conveying blades 320, a sleeve 330, and a conveying pipe 340. The main shaft 310 is coaxially and rotatably disposed within the conveying cylinder 200. The conveying blades 320 are spiral elastic sheets that are slidably mounted on the main shaft 310 in a front-to-back arrangement, with the rear end fixedly mounted at the rear end of the main shaft 310. The sleeve 330 is coaxially disposed outside the conveying cylinder 200 and slidably mounted on the conveying cylinder 200. The front end of the conveying pipe 340 extends into the copper mine goaf, and the rear end is fixed to the bracket 100 and slidably engages with the sleeve 330. A connecting assembly is provided between the sleeve 330 and the conveying blades 320.

[0026] The adjustment mechanism 400 is configured such that, when the filling material is delivered to the fixed enclosure through the delivery pipe 340 and the remaining space in the goaf is less than a preset value, the drive sleeve 330, through the connecting assembly, drives the front end of the delivery blade 320 backward, pushing on the delivery blade 320, causing the pitch of the delivery blade 320 to decrease. This adjusts the delivery rate of the filling material to the goaf according to the remaining space. When the filling material is delivered to the fixed enclosure, this prevents excessive pressure on the enclosure's panels and other structures, such as the wall, from being damaged by excessive filling speed, and prevents overflow of the filling material, which could result in waste.

[0027] In this embodiment, the adjustment mechanism 400 includes a trigger assembly and a drive assembly. The trigger assembly comprises a contact plate 411, a fixed plate 412, and a trigger hydraulic cylinder 413. The fixed plate 412 is fixed to the outside of the closed plate wall. Multiple trigger hydraulic cylinders 413 are provided and evenly distributed on the fixed plate 412. The piston rods of the trigger hydraulic cylinders 413 extend through the closed plate wall and into the goaf. The contact plate 411 is hinged to the movable end of the piston rod of the trigger hydraulic cylinder 413.

[0028] The driving assembly includes a driving hydraulic cylinder 421 and a conversion structure. The driving hydraulic cylinder 421 is vertically fixed on the bracket 100. The driving hydraulic cylinder 421 and the triggering hydraulic cylinder 413 are connected through an oil pipe.

[0029] The conversion structure is used to convert the extension of the piston rod of the driving hydraulic cylinder 421 into the sliding displacement of the sleeve 330 on the conveying cylinder 200 when the filling material is filled into the fixed closed area through the conveying pipe 340 and pushes the contact plate 411, driving the oil pressure in the triggering hydraulic cylinder 413 into the driving hydraulic cylinder 421. When the piston rod of the driving hydraulic cylinder 421 extends, the extension of the piston rod of the driving hydraulic cylinder 421 is converted into the displacement of the sleeve 330 on the conveying cylinder 200. As the remaining space in the goaf gradually decreases, the pressure of the filling material in the closed goaf on the contact plate 411 is converted into the displacement of the sleeve 330, so that the elastic conveying blades 320 are gradually compressed to reduce the pitch and reduce the rate at which the filling material is conveyed into the goaf.

[0030] In this embodiment, the conversion structure includes a conversion wheel 422 and a slide bar 423. The slide bar 423 is arranged front and back and is rotatably mounted on the bracket 100. A slider 424 is provided on the slide bar 423. The slider 424 and the slide bar 423 are matched with a ball screw. The slider 424 is fixedly connected to the sleeve 330. The conversion wheel 422 is sleeved on the piston rod of the driving hydraulic cylinder 421 and is matched with the piston rod of the driving hydraulic cylinder 421 by a ball screw. The conversion wheel 422 is rotatably mounted on the bracket 100. One-way transmission is achieved between the conversion wheel 422 and the slide bar 423 through a one-way transmission assembly. It is used to prevent the filling material in the conveying cylinder 200 from squeezing the conveying blades 320 and causing the sleeve 330 to slide relative to the conveying cylinder 200.

[0031] In this embodiment, the one-way transmission assembly includes a worm gear 431 and a worm 432. The worm gear 431 is fixedly mounted on the slide rod 423. The worm 432 is vertically mounted and rotatably mounted on the bracket 100. The worm 432 meshes with the worm gear 431. The worm 432 and the conversion wheel 422 are meshed and driven via an intermediate gear. The one-way transmission characteristics of the worm gear 431 and the worm 432 ensure more stable conveying of the filling material.

[0032] In this embodiment, the connecting assembly includes a collar 351 and a mounting ring 352. The collar 351 is slidably mounted on the front end of the main shaft 310. The collar 351 is connected to the front end of the conveying blade 320. The mounting ring 352 is rotatably mounted on the inner wall of the sleeve 330. The mounting ring 352 and collar 351 are fixedly connected by a connecting rod. This supports the rotation of the main shaft 310 while compressing the conveying blade 320 as the sleeve 330 slides.

[0033] In this embodiment, a power motor is fixedly mounted on the bracket 100 , and a belt is used to transmit power between the output shaft of the power motor and the main shaft 310 , thereby providing rotational force for the main shaft 310 .

[0034] In this embodiment, a buffer spring is provided between the contact plate 411 and the closing plate wall to prevent the filling material from pushing the contact plate 411 too quickly, causing the adjustment mechanism 400 to adjust the speed of conveying the filling material to the goaf too quickly, thereby reducing the filling efficiency.

[0035] In this embodiment, the sliding connection between the delivery tube 340 and the sleeve 330 is in the shape of a venturi tube, which is used to increase the delivery speed of the filling material from the delivery cylinder 200 into the delivery tube 340 and improve the early filling efficiency.

[0036] In combination with the above embodiments, the usage principle and working process of the present invention are as follows: when in use, the contact plate 411 is placed on the inner side of the closed plate wall, and the fixed plate 412 is fixed on the outer side of the closed plate wall. After the piston rod of the triggering hydraulic cylinder 413 passes through the closed plate wall and enters the goaf, the contact plate 411 is hinged to the movable end of the piston rod of the triggering hydraulic cylinder 413, and the power motor is started to drive the main shaft 310 to drive the conveying blades 320 to rotate.

[0037] When the filling material is filled into the fixed closed position through the conveying pipe 340 and the remaining space in the goaf is less than the preset value, and as the size of the remaining space in the goaf gradually becomes smaller, the filling material pushes the contact plate 411 and pushes the piston rod of the trigger hydraulic cylinder 413, so that the oil pressure in the trigger hydraulic cylinder 413 enters the driving hydraulic cylinder 421, so that the piston rod of the driving hydraulic cylinder 421 extends, driving the conversion wheel 422 to rotate, and the conversion wheel 422 drives the slide rod 423 to slide through the worm gear 431 and worm 432, and the slide rod 423 drives the slider 424 to slide back and forth, so as to convert the pressure of the filling material in the closed goaf on the contact plate 411 into the displacement of the sleeve 330, and the sleeve 330 drives the front end of the conveying blade 320 to move backward through the connecting assembly, and pushes the conveying blade 320, so that the pitch of the conveying blade 320 is reduced, so that the elastic conveying blade 320 is gradually compressed to reduce the pitch and reduce the rate of conveying the filling material to the goaf. When the filling material is filled into the fixed closed place, it avoids excessive filling speed which may cause damage to the closed plate wall and other structures of the fixed closed place by exerting a large squeezing force, and avoids overflow of the filling material and causing waste.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A conveying device for copper ore filling materials for mining, characterized by: It comprises a bracket (100), a conveying cylinder (200), a conveying mechanism (300), and an adjusting mechanism (400); The bracket (100) is arranged front and back; The axis of the conveying cylinder (200) is fixed on the bracket (100) in a front-back arrangement; a feed port is provided at the rear end of the conveying cylinder (200); The conveying mechanism (300) includes a main shaft (310), a conveying blade (320), a sleeve (330), and a conveying pipe (340); the main shaft (310) is coaxially and rotatably arranged in the conveying cylinder (200); the conveying blade (320) is a spiral elastic sheet, which is arranged front and back and is slidably sleeved on the main shaft (310), and the rear end is fixedly installed at the rear end of the main shaft (310); the sleeve (330) is coaxially arranged outside the conveying cylinder (200) and is slidably installed on the conveying cylinder (200); the front end of the conveying pipe (340) extends into the copper mine goaf, and the rear end is fixed on the bracket (100) and is slidably matched with the sleeve (330); a connecting component is provided between the sleeve (330) and the conveying blade (320); The regulating mechanism (400) is configured such that when the filling material is filled into the fixed closed area through the conveying pipe (340) and the remaining space in the goaf is less than a preset value, the driving sleeve (330) drives the front end of the conveying blade (320) to move backward through the connecting assembly, and pushes the conveying blade (320), so that the pitch of the conveying blade (320) is reduced, thereby adjusting the speed of conveying the filling material to the goaf according to the change in the size of the remaining space; the regulating mechanism (400) includes a triggering assembly and a driving assembly; the triggering assembly includes a contact plate (411), a fixed plate (412), and a triggering hydraulic cylinder (413); the fixed plate (412) is fixed on the outside of the closed plate wall; a plurality of triggering hydraulic cylinders (413) are provided and are evenly fixed on the fixed plate (412); the triggering hydraulic cylinder (413) 3) The piston rod passes through the closed plate wall and enters the goaf; the contact plate (411) is hinged to the movable end of the piston rod of the trigger hydraulic cylinder (413); the driving assembly includes a driving hydraulic cylinder (421) and a conversion structure; the driving hydraulic cylinder (421) is vertically fixed on the bracket (100); the driving hydraulic cylinder (421) and the trigger hydraulic cylinder (413) are connected through an oil pipe; the conversion structure is used to drive the oil pressure in the trigger hydraulic cylinder (413) to enter the driving hydraulic cylinder (421) when the filling material is filled into the fixed closed place through the conveying pipe (340) and pushes the contact plate (411), so that when the piston rod of the driving hydraulic cylinder (421) is extended, the extension amount of the piston rod of the driving hydraulic cylinder (421) is converted into the displacement amount of the sleeve (330) sliding on the conveying cylinder (200).

2. The conveying device for copper ore filling materials for mining according to claim 1, characterized in that: The conversion structure includes a conversion wheel (422) and a slide bar (423); the slide bar (423) is arranged front and back and is rotatably mounted on the bracket (100); a slider (424) is provided on the slide bar (423); a ball screw is engaged between the slider (424) and the slide bar (423); the slider (424) and the sleeve (330) are fixedly connected; the conversion wheel (422) is sleeved on the piston rod of the driving hydraulic cylinder (421) and is engaged with the piston rod of the driving hydraulic cylinder (421) by a ball screw; the conversion wheel (422) is rotatably mounted on the bracket (100); and one-way transmission is realized between the conversion wheel (422) and the slide bar (423) through a one-way transmission component.

3. The conveying device for copper ore filling materials for mining according to claim 2, characterized in that: The one-way transmission assembly includes a worm wheel (431) and a worm (432); the worm wheel (431) is fixedly mounted on the slide bar (423); the worm (432) is vertically arranged and rotatably mounted on the bracket (100); the worm (432) and the worm wheel (431) are meshed; and the worm (432) and the conversion wheel (422) are meshed and transmitted via an intermediate wheel.

4. The conveying device for copper ore filling materials for mining according to claim 1, characterized in that: The connecting assembly comprises a collar (351) and a mounting ring (352); the collar (351) is slidably mounted on the front end of the main shaft (310); the collar (351) is connected to the front end of the conveying blade (320); the mounting ring (352) is rotatably mounted on the inner wall of the sleeve (330); and the mounting ring (352) and the collar (351) are fixedly connected via a connecting rod.

5. The conveying device for copper ore filling materials for mining according to claim 1, characterized in that: A power motor is fixedly mounted on the bracket (100), and a belt transmission is used between the output shaft of the power motor and the main shaft (310).

6. The conveying device for copper ore filling materials for mining according to claim 1, characterized in that: A buffer spring is provided between the contact plate (411) and the closing plate wall.

7. The conveying device for copper ore filling materials for mining according to claim 1, characterized in that: The sliding connection between the delivery pipe (340) and the sleeve (330) is in the shape of a venturi tube.

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