WO2023102673A1

WO2023102673A1 - Autonomous device and system for real-time correction of the positioning of the primary crusher post, in mining

Info

Publication number: WO2023102673A1
Application number: PCT/CL2022/050125
Authority: WO
Inventors: Cristian Patricio MANSILLA IBÁÑEZ; Luis Humberto SÁNCHEZ TRONCOSO; Marika Verónica VARAS PARRA; Julio César SOZA SILVA
Original assignee: Phibrand Spa
Priority date: 2021-12-09
Filing date: 2022-12-09
Publication date: 2023-06-15
Also published as: CL2021003287A1

Abstract

The present invention relates to the field of mining, in particular, to a device, system and method for correcting the position of a bushing post in the eccentric of a mining primary crusher.

Description

DEVICE AND AUTONOMOUS SYSTEM FOR CORRECTION IN REAL TIME OF THE POSITIONING OF THE PRIMARY TRUCKER POST, IN MINING

FIELD OF THE INVENTION

The present invention relates to the field of mining, in particular, to a device, system and method to correct the position of a bushing post in the eccentric of a mining primary crusher.

BACKGROUND

In a mining extraction and production process, in particular, copper develops different stages, including one of these stages that related to the primary crushing process, which is the first operation that seeks to reduce the size of the mineral material extracted. The operation is carried out with a primary crusher, which later supplies the plant with a large part of mineral material.

A particular type of crusher is the primary gyratory crusher, which drives the mineral processing circuit, being of high performance and low downtime, and greater power that allows them to face constant changes in grade and conditions in an advantageous way. of ore. Also, these gyratory primary crushers create a safer and easier maintenance environment for workers by allowing hydraulic separation and individual lifting of the gyratory primary crusher casing, and often have monitoring systems that allow maintenance to be scheduled or verified. the need to do it.

Maintenance can involve both monitoring the condition, replacement or repair of parts such as spider bushing, upper casing, lower casing, hydraulic assembly, main shaft or post, eccentric, pinion, lubrication and drive system, among others; or monitoring, repairing or relining of wear parts such as mantles, concave segments, bottom shell side liners, spider cap, arm liners or edge liners, among others.

Maintenance are critical activities in the production process of a mining plant since they are required very frequently. Maintenance programs must therefore consider reduced stoppage times and the safety of the workers who must carry them out with complex and often large equipment. Then, the simplification of these maintenance tasks through the use of support mechanisms adjusted to the particular maintenance task that one wishes to develop, are highly desirable because they allow productivity to be increased and costs to be reduced.

Especially, the maintenance tasks in a primary crusher are risky, and preferably, the positioning of the post of the primary crusher is one of the most risky maintenance tasks. The great precision that is required in the positioning of the post makes it difficult to find or establish alternative forms to achieve a correct alignment of the post. crusher pole, during its maintenance. The challenge is not less when it is also considered that an error can be fatal.

The process is carried out with a special hydraulically powered crane that inserts the pole into the concave shaft. Throughout this process, there is the support of a person who helps to reduce/avoid the rotating movements of the post and thus allow its alignment. All this process takes approximately ¹ /z hour and the frequency of changing this post is 3 to 4 times a year. The pending task is to develop a device that allows the mounting of the pole without requiring any support from a person.

The Hidroset system is known (httDs://vom¡neha.¡¡mdofree.com/metalurg¡a-

that allows modifying the position of the post by applying hydraulic pressure, in the lower part of the device (Hidroset system), which can be used to modify the position of the post. The hydraulic pressure is applied by a hydraulic oil injected into the fluid reservoir chamber of the device (Hidroset system) and maintains a determined crushing opening for the material, between the fixed shells/casings and the main axis (post) and which is located in the lower body of the crusher, under the main shaft. The Hidroset system comprises a cylinder assembly; a balance cylinder and an oil supply system. A pump injects oil into the system line from a divided flow lubrication tank, since the oil from the lubrication system and that from the Hidroset system are divided by means of a separator plate. The position of the post is controlled by a position sensor located at the bottom of the Hidroset system. The Cylinder Assembly or Set of Connected Parts that make up the Hidroset Control, supports the main shaft support plate (post) and includes moving parts that connect to the crusher. The lower-upper bushing and the cylinder are the static parts of the hydroset system. Located at the bottom of the cylinder is the sensor post and the oil flow lines for the system. To the set of connected parts, hydraulic oil is injected into the hydroset fluid reservoir chamber to determine its position. The oil or hydroset fluid exerts or removes pressure on the clamping plate, the plate pushes the piston thus causing the vertical movement of the plate and the piston (up or down) and as a result of constant pressure, loose parts within the assembly are held together, which acts as a piston. The balance cylinder prevents the sudden drop of the main shaft assembly from the pole when pressure on the crusher forces it upward. The system has a pressure gauge, a check valve and two relief valves in order to relieve high pressures in the Hidroset control line. When the main shaft is forced up by the uncrushable pieces of material, the balance cylinder causes the piston to follow the main shaft up and help it back down to its original position. Under normal operating conditions, the balance cylinder contains a fixed amount of oil and nitrogen. The balance cylinder contains nitrogen at a pressure of 105 psi. (724 KPa).

US4027825A (Allis Chalmers Corp) relates to removal of an eccentric mount by operation of the crusher head shaft piston exerting a pushing force upwards and simultaneously applies high pressure fluid to the eccentric outer bearing housing.

US6648255B2 (Metso Minerals Industries Inc) refers to an anti-spin mechanism having a torque limiter for a cone crusher. The eccentric mechanism can be coupled to the head, has a one-way clutch that can be coupled to the shaft, and a friction torque limiting clutch located on the head and coupled between the head and the one-way clutch.

BRIEF DESCRIPTION OF THE FIGURES

Figure 1 Shows main parts of the crushing system, and tasks of the main maintenance of the pole change.

Figures 2A-2C Show the primary crusher and its main components, in front view (Fig. 2A), in cross section (Fig. 2B) and just the post (2C).

Figures 3A and 3B Show the present primary crusher eccentric bushing taper post positioning device (Fig. 3A) and a top view of the interior of the eccentric (Fig. 3B).

Figure 4 Shows the assembly of the present device for positioning the post in the hub of the eccentric of the primary crusher.

Figures 5A-5C Show the assembly sequence of the present device on the conical post, when it is unassembled (Fig. 5A), being transferred to the post (5B) and installed on the post (5C).

Figures 6A-6C shows the upper part of the present device with more than one pair of upper dampers and shows how the device upper part gripping system is fixed by means of a pin-type fixing means to the upper part gripping means of the device. post. First, the device is located in wedge with the post (Fig. 6A) to then fix the pin (Fig. 6B) and that both gripping means, the device and the post, remain together (Fig. 6C).

Figures 7A-7E Show the device attached to the post over the eccentric bushing (Fig. 7A), over the eccentric bushing in a top view (Fig. 7B) and down towards the eccentric bushing (Fig. 7C) . It shows the device attached to the post on the eccentric bushing (Fig. 7D) and installed in the eccentric bushing (Fig. 7E) to then remove the device by releasing the pin and engaging by means of grip only the device so that the crane remove it, lifting it up.

DETAILED DESCRIPTION OF THE INVENTION

The present invention is related to a device (1), system and method to correct in real time and autonomously, the position of the axis of a post (2) with a conical body in an eccentric bushing (3) of a crusher. eccentric swivel (4), in order to correctly assemble it on the eccentric bushing, after having carried out the maintenance of the gyratory crusher.

The present device (1) to correct in real time, the position of the axis of a post (2) with a conical body in an eccentric bushing (3) of an eccentric rotary crusher (4), It comprises: at least one pair of upper adjustable dampers (5, 6) and at least one pair of opposite, lower, adjustable dampers (7, 8), wherein said pair of adjustable or variable-travel dampers have locations opposite each other, and They contract or extend independently of each other. In addition, said pairs of adjustable, opposed, upper dampers (5,6) and said pair of adjustable, opposed, lower dampers (7,8) can be located parallel or perpendicular to each other.

The device (1) also comprises a control means (4), and with it, eliminates the risk of a suspended load for the person who guides or the human guide of the traditional assembly of the post. Said control means (10) regulates by means of adjustment means (1 1 ), the travel of each shock absorber, independently, one from the other. The regulation means (1 1 ) are activated according to the control means (10) commanded, this is according to the processing of the images obtained from the image capture means (12).

The shock barrels retract or expand as necessary to ensure proper entry of the post (2) into the eccentric bushing (3). The above, without input of energy to the cylinder fluid, which is traditionally used to modify its position. The position correction of the shock absorber cylinders is achieved only by action of gravity, opening and closing by means of solenoid valves (regulation means) actuated by the control means (4).

On the other hand, the control means (4) controls the regulation means (11) so that it acts on each damper cylinder, independently, activating and/or deactivating the solenoid valves of one and the opposite one, as required. By way of example, if the post is required to descend without inclination towards the inside of the eccentric hub, reducing or increasing the distance between the inner wall of the eccentric and the device (1), the solenoid valve closes or opens respectively to allow contraction or extension of the shock absorber cylinder. In this way, the adjustment means (11) or actuator ensures an essentially vertical or straight path of descent of the post (2) without it colliding with the interior walls of the eccentric.

The device (1) also comprises at least one image capture means (12) that sends continuous information or images that are processed by a central server (14) and this sends a response with indications to the control means (4) to act. on the means of regulation (11 ). The information is sent from the control means to the central server (14) and back by means of wireless communication (13), preferably Wi-Fi means.

Said at least one image capture means (12) is located in at least one of the pair of lower adjustable dampers (7,8) and is oriented towards the inside of the eccentric (3) of the rotary crusher (4). The image capture means (12) can be a camera, and they are fixed to said at least one lower adjustable damper by means of a fixing means (17) that fixes the camera to the damper, at one end, and allows the adjustment of the angle. camera image capture, at the other end. The device (1) also comprises power supply means (8) and an upper grip means (15) by which a crane-type machinery (18) can hold or lift the device (1) and then gradually raise it, lower or move it to the left or right, or back and forth, as required, to achieve mounting or installation of the post (2) on the gyratory crusher (4). The grip means (15) is located centrally in the upper part of the device (1), and can receive, for example, at least one hook from a lifting crane, and is fixed to the post (2) in the middle. upper grip of this by means of a pin (19) that allows to keep together, the post (2) with the device (1), during the hoisting of the crane, which holds them from the grip means of the post (2).

Optionally, the device (1) can comprise one or more pairs of opposed, adjustable dampers, located between said at least one pair of upper, opposed, adjustable dampers (5, 6) and said at least one pair of opposed, adjustable dampers, bottom (7, 8).

The mantle of the conical body is made of steel, of the weldable structural type, specifically they can be in qualities, A-36, A37-24, SAE 1020, among others that have characteristics and properties similar to those named.

The other components of the device as indicated above and that can be welded (structural elements, lifting elements, reinforcements, among others), are also made of steel, of the structural type, specifically they can be in qualities A-36, A-37- 24, SAE 1020, among others that have characteristics and properties similar to those already named.

For those components such as those whose objective is the connection such as the pin that connects the mantle of the conical body with the post, the material is steel, although a steel that allows the purpose to be achieved, for example, 1040 steel.

The central server processes the complete image captured by the image capture means, and does not use a referential image, since it has a battery of about 800 base images that were later modified in brightness used in a training algorithm, generated images modified in brightness, increasing by approx. 70 times the images of an image library of the eccentric that was used to train the machine to recognize the characteristics of interest of the eccentric, which will be used to detect and identify by patterns, preferably the area of the captured image, the post location.

The system to correct in real time and autonomously, the position of the axis of a post (2) with a conical body in an eccentric bushing (3) of an eccentric rotary crusher (4), comprises: the device (1) previously described and a central server (14) to which the control means (4) send information on the images captured by the image capture means (12), and wireless communication means (13), preferably Wi-Fi means, that allow the sending of information from the control means (4) to the central server (14). Method to correct in real time and autonomously, the position of the axis of a post (2) with a conical body in an eccentric bushing (3) of an eccentric gyratory crusher (4), which comprises the following stages: a) position the device (1) described above on said post (2) and then let it descend on it, reaching the fit between both, said post (2) and said device (1), and so that the gripping means (15) of the upper part of said post (2) allow the location of a pin (16) that holds together said post (2) and said device (1), and said upper gripping means of the post (2) also allows the hooking of a crane that will hoist it and then locate it inside the eccentric (3), b) lift and move by means of a crane-type lifting machinery, jointly, said device (1) and said post (2) on the hub of the eccentric (3) of the primary gyratory crusher (4), lifting them from the gripping means (16), and after positioning them centrally on the eccentric (3) and then lowering them slowly until mounting the post (2) on the bushing of the primary gyratory crusher (4). eccentric (3) while image capture means (12) continuously capture images inside the eccentric, and send it to the control means (4) from where they are sent to a central server (14) by means of communication wireless (13), preferably Wi-Fi, and then returned from it and by the same means of wireless communication, in response to the information received from the images captured by the image capture means, signals to the control means that allow them to regulate the adjustment means (12), and with it, pick up or extend the travel of each shock absorber, independently, as required to correct the lowering of the post (2) in the eccentric (14), and thus ensure that it lowers centered, which will allow the correct assembly of the post (2) on the eccentric (3), and c) release the post from the device (1) when the post (2) has been completely assembled on the eccentric, and remove the device by lifting it with the crane.

Claims

7 CLAIMS Device (1), system and method to correct in real time and autonomously, the position of the axis of a post (2) with a conical body in an eccentric bushing (3) of an eccentric rotary crusher (4) , in order to correctly assemble it, on the eccentric hub, after having carried out the maintenance of the gyratory crusher, characterized in that it comprises: a) at least one pair of upper adjustable shock absorbers (5, 6) and at least one pair of adjustable, opposite, lower dampers (7,8), wherein said pair of adjustable or variable-travel dampers have opposite locations to each other, and contract or extend independently of each other, and furthermore, said pairs of adjustable, opposed, upper dampers (5,6) and said pair of adjustable, opposed, lower dampers (7,8), can be located parallel or perpendicular to each other; b) a means of control (4), and with it, eliminates the risk of a suspended load for the person who guides or the human guide of the traditional assembly of the pole, which regulates by means of adjustment means (11), the route of each damper, independently, one from another; c) regulation means (11) that are activated according to the control means (10) that command them, that is, according to the processing of the images obtained from the image capture means (12), preferably electrovalves, where the means of control (4) controls the regulation means (11) so that it acts on each shock absorber cylinder, independently, activating and/or deactivating the solenoid valves of one and the opposite one, as required; d) at least one image capture means (12) that sends continuous information or images that are processed by a central server (14) and this sends a response with indications to the control means (4) to act on the regulation means (1 1 ), where said at least one image capture means (12) is located in at least one of the pair of lower adjustable dampers (7,8) and is oriented towards the inside of the eccentric (3) of the rotary crusher (4), being selectable from a camera, where the image capture means comprise power supply means (8); e) fixing means of said at least one image capture means to said at least one lower adjustable damper by means of a fixing means (17) that fixes the camera to the damper, at one end, and allows adjustment of the capture angle camera image, at the other end, f) a means of support that comprises at its upper end, and in a centered manner, an upper grip means (15) by means of which a crane-type machinery (18) can hold or ¡zar, the device (1) and then gradually raise it, lower it or move it 8 to the left or right, or back and forth, as required, to achieve mounting or installation of the post (2) in the gyratory crusher (4), where the gripping means (15) is attached to the post (2 ) in the upper gripping means of the latter by means of a pin (19) that allows both the post (2) and the device (1) to be kept together during the hoisting of the crane. The device of claim 1 characterized in that it can comprise one or more pairs of opposed, adjustable dampers, located between said at least one pair of upper, opposed, adjustable dampers (5, 6) and said at least one pair of opposed, adjustable dampers , lower (7, 8). System to correct in real time and autonomously, the position of the axis of a post (2) with a conical body in an eccentric bushing (3) of an eccentric gyratory crusher (4), characterized in that it comprises: a) the device (1) of claim 1; b) a central server (14) that receives from the device (1) information on the images captured by the latter, and that processes them without using a referential image since it has an image library of the eccentric (3) that allows to recognize the characteristics of interest of the same, and use them to detect and identify by means of patterns, the location of the post (2), and c) wireless communication means (13) that allow the sending of information from the control means (4) to the central server (14). The system of claim 3 characterized in that said means of wireless communication are Wi-Fi means. The system of claim 3 characterized in that said patterns are the area of the captured image. Method to correct in real time and autonomously, the position of the axis of a post (2) with a conical body in an eccentric bushing (3) of an eccentric gyratory crusher (4), characterized in that it comprises the following stages: a ) position the device (1) described above on said post (2) and then let it descend on it, reaching the fit between both, said post (2) and said device (1), and so that the gripping means (15 ) of the upper part of said post (2) allow the location of a pin (16) that holds together said post (2) and said device (1), and said upper gripping means of the post (2) also allows the hitch of a crane that will hoist it and then locate it inside the eccentric (3), b) lift and move by means of a crane-type lifting machinery, jointly, said device (1) and said post (2) on the hub of the eccentric (3) of the primary gyratory crusher (4), lifting them from the gripping means (16), and after positioning them centrally on the eccentric (3) and then lowering them slowly until mounting the post (2) on the bushing of the eccentric (3) while means of capture of 9 images (12) continuously capture images inside the eccentric, and send it to the control means (4) from where they are sent to a central server (14) by means of wireless communication (13), preferably Wi-Fi, and then it returns from it and by the same means of wireless communication, in response to the information received from the images captured by the image capture means, signals to the control means that allow them to regulate the regulation means (12) , and with it, collect or extend the travel of each shock absorber, independently, as required to correct the lowering of the post (2) in the eccentric (14), and thus ensure that it lowers centrally, which will allow achieving the correct assembly of the post (2) in the eccentric (3), and c) release the post from the device (1) when the post (2) has been completely assembled on the eccentric, and remove the device by lifting it with the crane.