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CN-115551651-B - Screen assembly for a mobile bulk material handling apparatus

CN115551651BCN 115551651 BCN115551651 BCN 115551651BCN-115551651-B

Abstract

The present disclosure provides a screen assembly for a mobile bulk material handling apparatus (100) that is capable of adjusting its position relative to a base frame (102) of the mobile bulk material handling apparatus to facilitate transfer of material from a screen (120) to a processing unit, such as a crusher, by optimizing the height and operating angle of the screen assembly. The screen assemblies thus disclosed are also capable of being folded into a compact arrangement that complies with transportation regulations, while also being convenient and safe for operators. The screen assembly comprises a base frame (102) and at least two linking elements (107, 111) coupled at a pivotable joint such that when in an operational position, the two linking elements are configured to adjust the height and inclination angle of a screen box (3) to facilitate transfer of material from the screen to the crusher.

Inventors

  • Prasad Nalbirvo

Assignees

  • 山特维克有限公司
  • 山特维克矿山和岩石技术印度私人有限公司

Dates

Publication Date
20260508
Application Date
20200420

Claims (15)

  1. 1. A mobile screen assembly (100), the mobile screen assembly (100) supporting a screen box (101) for mobile bulk material handling equipment, the mobile screen assembly comprising: A crusher (206); a base frame (102), the base frame (102) having a front end (130), a rear end (104), a lower surface (105), and an upper surface (106); -a first link element (107), the first link element (107) having a first link element front end (108) and a first link element rear end (109), the front end (108) of the first link element (107) being movably connected to the base frame (102) via a first attachment means (103) arranged with the base frame (102) to allow a first tilt angle (α) to be set between the base frame (102) and the first link element (107); The second link element (111) has a second link element front end (114) and a second link element rear end (115) arranged at the crusher (206), the second link element (111) being movably arranged with the first link element (107) via a second attachment means (116) arranged with the first link element (107) to allow a second tilt angle (β) to be set between an upper surface of the first link element (107) and a lower surface (113) of the second link element (111) for enabling the second link element front end (114) to be raised relative to the crusher (206).
  2. 2. The mobile screen assembly (100) of claim 1, wherein the second linking element (111) further comprises at least one pair of screen support structures (119) affixed to an upper surface (112) thereof.
  3. 3. The mobile screen assembly (100) of claim 1 or claim 2, wherein the second linking element (111) is configured to carry the screen box (101) on its upper surface (112).
  4. 4. The mobile screen assembly (100) of any of claims 1-2, wherein the first attachment means (103) between the first linking element (107) and the base frame (102) is a pivot joint.
  5. 5. The mobile screen assembly (100) of any of claims 1-2, wherein the second attachment means (116) between the first linking element (107) and the second linking element (111) is a pivot joint.
  6. 6. The mobile screen assembly (100) of any of claims 1-2, wherein the second linking element (111) comprises a pair of parallel elongated members (117), respective front and rear ends of the pair of parallel elongated members (117) being connected by a pair of horizontal parallel members (118).
  7. 7. The mobile screen assembly (100) of any of claims 1-2, wherein the mobile screen assembly (100) includes a vertical rear support structure (200) positioned at the rear end (104) of the base frame (102) that extends upwardly from the base frame (102) onto a rear end (115) of the second linking element (111) when the mobile screen assembly (100) is in an operational mode.
  8. 8. The mobile screen assembly (100) of any of claims 1-2, wherein the mobile screen assembly (100) includes a vertical front support structure (202) positioned at the base frame (102) proximate the first attachment device (103) that extends upwardly from the base frame (102) to the second linking element (111) when the mobile screen assembly (100) is in an operational mode.
  9. 9. The mobile screen assembly (100) of any of claims 1-2, wherein the mobile screen assembly (100) further comprises an actuation means to enable the first and second linking elements (107, 111) to move in a vertical direction between a transport mode and an operational mode.
  10. 10. The mobile screen assembly (100) of claim 9, wherein the actuation means comprises at least one pair of extendable and retractable first hydraulic cylinders (204) attached to the base frame (102), the first hydraulic cylinders configured to swing the first linking elements (107) away from the base frame (102) while remaining attached at the first attachment means (103).
  11. 11. The mobile screen assembly (100) of claim 10, wherein the actuation device further comprises at least one pair of extendable and retractable second hydraulic cylinders (205), the second hydraulic cylinders (205) being attached to the first linking element (107), the second hydraulic cylinders being configured to oscillate the second linking element (111) away from the first linking element (107) while maintaining mechanical coupling with the first linking element (107) at the second attachment device (116).
  12. 12. The mobile screen assembly (100) of any of claims 1-2, wherein the mobile screen assembly (100) includes a locking system (400) to secure the mobile screen assembly (100) when the mobile screen assembly (100) is in an operational mode.
  13. 13. The mobile screen assembly (100) of claim 12, wherein the locking system (400) comprises at least one pair of parallel plates (401) of the first linking element (107) and a locking pin (403), each plate (401) having an aperture (402), the locking pin (403) passing through the second linking element (111) such that the first linking element (107) and the second linking element (111) are affixed together by the locking pin (403).
  14. 14. A mobile bulk material handling unit comprising: The mobile screen assembly (100) of any of claims 1-13, A feed chute (501), the feed chute (501) being mechanically attached to one end of the screen box (101), and At least one conveyor (503), the conveyor (503) being for transporting material to the processing unit (502) or for transporting material away from the crusher (206).
  15. 15. A method for adjusting the position of a sieve box (101) mounted on a mobile bulk material handling unit, the method comprising the steps of: g) The mobile screen assembly (100) of any of claims 1-13, wherein the mobile screen assembly (100) includes a locking system (400) to secure the mobile screen assembly (100) when the mobile screen assembly (100) is in an operational mode, H) -raising said second linking element (111) to a predetermined angle (beta) using a pair of second hydraulic cylinders (205), I) A pair of first hydraulic cylinders (204) is used to raise the first link element (107) to a predetermined angle (alpha) to enable the screen box (101) to achieve the required height for material flow into the crusher (206), J) Locking the position of the raised first linking element (107) using the locking system (400) for the duration of operation, and K) -lowering the first (107) and second (111) linking elements and folding the first (107) and second (111) linking elements onto the base frame (102) when the mobile screen assembly (100) is in a transport mode.

Description

Screen assembly for a mobile bulk material handling apparatus Technical Field The present disclosure relates to a mobile bulk material handling apparatus and, in particular, but not exclusively, to a screen assembly removably attachable to a mobile bulk material handling apparatus. More particularly, the present disclosure relates to a screen assembly that is capable of adjusting its position, and in particular its height and inclination relative to a base frame of a mobile bulk material handling apparatus. Background Mobile bulk material handling equipment has been developed for a wide variety of applications including the handling of stone, minerals, construction materials, and household and industrial waste to produce smaller and/or sized aggregates for subsequent handling, use, or disposal. For example, in quarry or clean-up site environments, stone, crushed stone, or site cleaning materials are crushed into smaller pieces using mobile crushers. Many of these devices use a sizer to sort the aggregate according to its size. Sorting can be accomplished by vibration of the screen which causes undersized particles to pass through openings in the screen surface while oversized particles remain above the screen surface. During operation, the sizer sometimes needs to be tilted and/or lifted to facilitate transfer of material from the surface of the screen to a material handling unit, such as a crusher. Such adjustment of the operating angle of the screen has been achieved in the past by several techniques. In some installations, the fixed inclined screen is configured such that the screen surface is sloped, typically at the discharge end, to assist in the movement of material to the material crushing unit by sliding the material off the edges of the screen. Furthermore, it is desirable to maintain the screens in a horizontal or near horizontal orientation during transport to meet transportation regulations, particularly regulations limiting the height of vehicles on roads. The horizontal orientation is also advantageous during maintenance operations, because it is easier for an operator to change screening media when the screen is horizontal. To achieve various ramp positions (including horizontal positions) of the screen for operation, screen lifting mechanisms have been developed. Patent documents US20130037454A1 and US20190160492A1 disclose mechanisms for using sieves at variable operating angles. However, none of the prior art documents disclose mechanisms for varying both the height and inclination of the screen assemblies. Furthermore, most position adjustment mechanisms utilize a single pivotable joint to change the position of the screen. If such a mechanism is also used to change the height of the screen, the length of the base frame of the apparatus would need to be increased, which would lead to transportation problems and would also increase the cost and weight of the apparatus. Accordingly, there is a need for a screen assembly that is compact, simple in design, convenient to use, and capable of adjusting both height and inclination angle to facilitate transfer of material from the screen into the material handling unit. Disclosure of Invention Some of the objects of the present disclosure met by at least one embodiment herein are as follows: It is an object of the present disclosure to ameliorate one or more of the disadvantages of the prior art, or at least to provide a useful alternative. More specifically, it is an object of the present disclosure to provide a position adjustment mechanism for a screen assembly of a mobile bulk material handling unit to achieve an optimal height and inclination angle to facilitate feeding of material to a handling unit such as a crusher. It is another object of the present disclosure to provide a position adjustment mechanism for a screen assembly that allows the screen assembly to be lowered to a substantially horizontal orientation during transportation to meet transportation regulations limiting the height of the vehicle on the road. It is a further object of the present disclosure to provide a mechanism for adjusting the position of a screen assembly relative to a base frame or chassis of an apparatus that is simple in construction, easy to use and install. It is a further object of the present disclosure to provide a compact screen assembly that can be folded and unfolded without having to increase the length of the base frame. It is another object of the present disclosure to provide a screen assembly with improved safety standards during transportation and operation. Other objects and advantages of the present disclosure will become more apparent from the following description, which is not intended to limit the scope of the present disclosure. The above objects are achieved by the present disclosure in that it provides a screen assembly that is capable of adjusting its position relative to a base frame of a mobile bulk material handling apparatus to fa