Overload protection device for hydraulic systems of mineral material processing plants

Abstract

The invention relates to an overload protection device, wherein a hydraulic component equipped to store and / or to transport hydraulic fluid is provided, the hydraulic component comprising a connection area having a passage opening for the hydraulic fluid of a hydraulic system, the passage opening being covered by a replaceable explosion-proof panel, an explosion-proof panel holder being arranged on the back of the explosion-proof panel facing away from the connection area, at least one fastening screw passing through a screw mount of the explosion-proof panel holder and through a drilled hole of the explosion-proof panel arranged in alignment therewith and being screwed into a thread mount of the connection area, such that in the assembled state the explosion-proof panel is held clamped between a pressure surface of the explosion-proof panel holder and a connection surface of the connection area. It is provided according to the invention to provide at least one holding element which holds the explosion-proof panel holder to the hydraulic component in a disassembled position when the at least one fastening screw is loosened from the thread mount of the connection area and the explosion-proof panel is removed.

Description

Technical Field

[0001] This invention relates to an overload protection device for a hydraulic system of mineral processing equipment, particularly for rotary impact crushers, jaw crushers, etc., wherein a hydraulic element is provided, the hydraulic element being configured to store and / or transport hydraulic fluid, wherein the hydraulic element includes a connection area having a channel opening for hydraulic fluid in the hydraulic system, wherein the channel opening is covered by a replaceable explosion-proof panel, wherein an explosion-proof panel retainer is disposed on the back of the explosion-proof panel opposite to the connection area, and at least one fastening bolt passes through the bolt mounting member of the explosion-proof panel retainer and through a hole in the explosion-proof panel aligned therewith, and the bolt is connected to a threaded mounting member in the connection area, such that in the assembled state the explosion-proof panel remains clamped between the pressure surface of the explosion-proof panel retainer and the connection surface of the connection area. Background Technology

[0002] A mineral material processing apparatus, particularly a rotary impact crusher, is known from DE 10 201 0 015 583B4. This rotary impact crusher has a crushing unit with a crushing rotor. Radially outward, the crushing rotor has a plurality of impact rods defining an impact circle. Opposite the crushing rotor, there is at least one wall element in the form of an impact rocker arm. A crushing gap is formed between the impact rocker arm and the impact circle.

[0003] During operation, the material to be crushed is fed into the crushing unit. There, an impact bar throws it radially outward. The material then impacts the impact bar, breaking it apart. Once the material has a particle size smaller than the crushing gap, it falls through the gap and leaves the area of ​​the crushing unit. A crushing discharge conveyor is located below the crushing unit. The crushing discharge conveyor is used to remove the crushed material.

[0004] In impact crushers, hydraulic cylinders typically support the impact rocker arm on the crusher chassis. The hydraulic cylinders are used to set and maintain the crushing gap at the desired size.

[0005] An overload protection device is installed when uncrushable material enters the crushing space of the crusher unit and cannot escape through the set crushing gap.

[0006] Overload protection devices may have so-called explosion-proof panels. These panels seal the channel openings of the hydraulic cylinder. If excessive force is applied to the impact rocker arm (e.g., in the case of uncrushable material in the crushing space) and therefore also to the support hydraulic cylinder, this results in excessive pressure harmful to the system. To protect the hydraulic system and prevent damage, the explosion-proof panel then breaks. Hydraulic oil can then escape from the hydraulic cylinder through the channel openings, and the hydraulic cylinder can retract. Therefore, the impact rocker arm can move to the side, and the crushing gap opens. Uncrushable material can then escape through the crushing gap opened in this way.

[0007] The explosion-proof panel is clamped between the housing of the hydraulic cylinder and the explosion-proof panel retainer. Typically, this involves using bolts that pass through holes in both the explosion-proof panel retainer and the explosion-proof panel and are bolted to the hydraulic cylinder.

[0008] Following an overload event, the explosion-proof panel must be replaced. To do this, the fastening bolts must be loosened and the explosion-proof panel retainer removed. The explosion-proof panel retainer must be loosened carefully; otherwise, hydraulic fluid may leak. Furthermore, in the limited installation space of processing equipment, it is not always easy to align and attach the explosion-proof panel retainer to the hydraulic cylinder. Summary of the Invention

[0009] The present invention solves the problem of providing an overload protection device of the above type, which provides improved ease of maintenance after an overload event.

[0010] This problem is solved by providing at least one retaining element that holds the explosion-proof panel retainer to the hydraulic components in the disassembled position, particularly at the connection area, when at least one fastening bolt is loosened from the threaded mounting in the connection area and the explosion-proof panel is removed.

[0011] If the overload protection device triggers after an overload event, the explosion-proof panel must be replaced. According to the invention, this is easily achieved by removing the mounting bolts and disconnecting the explosion-proof panel connection in the clamping area between the explosion-proof panel retainer and the connection area. The explosion-proof panel can then be removed. In this disassembled position, the retaining element holds the explosion-proof panel retainer to the connection area. This prevents hydraulic oil leakage from the explosion-proof panel retainer. A new explosion-proof panel can then be inserted to replace the damaged one. The explosion-proof panel retainer can then be reconnected. This can be easily done because the retaining element is used to hold the explosion-proof panel retainer in place. The installer now only needs to reinsert the fastening bolts and connect them to the threaded mounting in the connection area. The overload protection device can then be used again.

[0012] Preferably, when the fastening bolts are removed, the retaining element subsequently restricts the explosion-proof panel retainer in terms of its movement selection, allowing it to move only in one or two degrees of freedom. For example, the retaining element is designed such that the explosion-proof panel retainer can only rotate relative to the connection area (one degree of freedom), or it can only rotate relative to the retaining element and displace laterally to the plane of the explosion-proof panel.

[0013] According to a preferred variant of the invention, the explosion-proof panel includes one or more recesses having a lateral insertion section that opens the recess toward a side extending laterally to the plane of the explosion-proof panel, such that the retaining element can be laterally inserted into and removed from the recess laterally to the plane of the blasting element. Once the mounting bolts are removed, the blasting panel can be pulled out from the area between the blasting panel retainer and the mounting area. The retaining element remains in its position. When a new blasting panel is subsequently inserted, it can first be simply pushed onto the retaining element. The retaining element moves into the recess via the insertion section. Therefore, even under complex installation conditions, the positioning of the blasting panel is reliable and well-defined. Furthermore, this also results in a space-saving design.

[0014] When retaining elements formed by bolts are provided, it results in a particularly simple design.

[0015] Preferably, in this case, the bolt may also be specified to engage with the bolt section in the recess, and the retaining element may be specified to pass through the bolt mounting part and the recess of the explosion-proof panel retainer, and be connected by bolt to a threaded mounting part formed in the connecting surface of the connection area. Preferably, in addition to the fastening bolt for supporting the explosion-proof panel retainer, a retaining element may also be used.

[0016] If the specifications stipulate that the flat front of the explosion-proof panel rests on the connecting surface of the connection area, and the oppositely flat back rests on the pressure surface of the explosion-proof panel holder, and that the explosion-proof panel holder is clamped between the connecting surface and the pressure surface, then after the clamping connection has been released (and the fastening bolts have been removed), a slight increase in the distance between the explosion-proof panel holder and the installation area is sufficient. Since it can be pulled laterally from its installation position without obstruction, disassembly of the explosion-proof panel is easy. Therefore, a new explosion-proof panel can then be easily inserted into the gap area between the explosion-proof panel holder and the installation area. This further reduces the risk of oil leakage.

[0017] When the retaining element is specified to form a rotary bearing with a section (particularly with the recess) of the explosion-proof panel, a particularly advantageous embodiment is achieved, wherein the axis of rotation of the rotary bearing is transverse to the connecting surface, such that when the fastening bolts are removed, the explosion-proof panel can then be rotated transversely to the connecting surface away from its mounting position. This increases the ease of assembly. In particular, a new explosion-proof panel can be pre-positioned on the rotary bearing and then easily moved into the screw-in mounting position.

[0018] According to the present invention, the explosion-proof panel may be provided with a rupture element having a predetermined fracture point, which is preferably in the form of a weakened cross-section. Specifically, the rupture element can be connected to the explosion-proof panel through the predetermined fracture point, such that it is completely destroyed under overload. Preferably, the rupture element may optionally remain integrally connected to the explosion-proof panel via a section of material under overload.

[0019] If the explosion-proof panel retainer is specified to have a conductive section, which is covered by the explosion-proof panel in the installed state, and a channel section of the explosion-proof panel retainer is specified to be adjacent to the conductive section and to lead to a pipeline connector that connects or can be used to connect hydraulic lines to the explosion-proof panel retainer, then the explosion-proof panel can be reliably triggered in the direction of the conductive section. For this purpose, the conductive section provides an area into which the explosion-proof panel can deform. Additionally, spilled hydraulic oil can be collected in the channel section of the explosion-proof panel retainer and then discharged in an orderly manner into a discharge pipeline system or guided to a collection tank via the pipeline connector.

[0020] In this invention, the preferred overload protection device makes the hydraulic element a hydraulic cylinder having a cylinder housing in which a piston is adjustably guided, wherein a piston rod is connected to the piston and its piston rod head is guided out of the hydraulic cylinder, wherein the piston defines a pressure chamber, and wherein the pressure chamber is spatially connected to a channel opening in the connection area. Preferably, the explosion-proof panel is positioned such that, in the assembled position, the plane of the explosion-proof panel extends transversely, and particularly perpendicularly, to the direction of movement of the piston. This facilitates access to the overload protection device, thereby facilitating the assembly or disassembly of the explosion-proof panel.

[0021] Preferably, the hydraulic cylinder (preferably its piston rod) is connected to the wall element of the crusher unit via a rotary bearing, and the wall element is held rotatably on the chassis via the bearing, wherein the wall element is preferably the impact rocker arm of the rotary impact crusher.

[0022] The problem of the present invention is also solved by a method for repairing an overload protection device for mineral material processing equipment, wherein the overload protection device is designed according to the above description, wherein the fastening bolts are loosened and removed while the retaining element holds the explosion-proof panel retainer connected to the connection area, wherein the explosion-proof panel of the overload protection device is then removed and a new explosion-proof panel is inserted into the overload protection device, and then the fastening bolts are reinserted into the bolt mount of the explosion-proof panel retainer and inserted into the hole of the new explosion-proof panel, and the bolts are connected to the threaded mount of the connection area. Attached Figure Description

[0023] The invention will now be explained in more detail with reference to exemplary embodiments shown in the accompanying drawings. In the drawings:

[0024] Figure 1 A schematic side view of the crusher is shown;

[0025] Figure 2 Show Figure 1 The crusher unit of the crusher;

[0026] Figure 3 A hydraulic cylinder with overload protection is shown;

[0027] Figure 4 Showing from different perspectives Figure 3 The illustration in the image;

[0028] Figure 5 Show Figure 3 and Figure 4 A top view of the explosion-proof panel of the overload protection device; and

[0029] Figure 6 A schematic diagram showing a portion of the hydraulic circuit of a crusher. Detailed Implementation

[0030] Figure 1 The processing equipment shown is in the form of a crusher 10. The crusher 10 is designed as a mobile crusher and therefore has a base frame 15. However, it is also conceivable that the crusher 10 is a stationary crusher.

[0031] The crusher 10 has a chassis 11 that supports machine parts or at least a portion of machine parts. The chassis 11 has a cantilever 12 at its rear end. A material feed area is formed in the area of ​​the cantilever 12.

[0032] The material feeding area includes a feeding hopper 20 and a material feeding device 16.

[0033] The feed hopper 20 may be formed at least partially by a hopper wall 21 and a rear wall 22, the hopper wall 21 extending in the longitudinal direction of the crusher 10 and the rear wall 22 extending transversely to the longitudinal direction. The feed hopper 20 leads to the material feeding device 16.

[0034] As shown in this exemplary embodiment, the material feeding device 16 may have a conveyor chute, which can be driven by a vibration driver. The feed hopper 20 can be used, for example, to feed the material to be crushed into the crusher 10 and onto the conveyor chute using a wheel loader.

[0035] The material to be crushed enters the area of ​​the screening unit 30 from the conveyor chute. This screening unit 30 may also be referred to as a pre-screening arrangement. At least one screen plate 30.1, 30.2 is disposed in the area of ​​the screening unit 30. In this exemplary embodiment, two screen plates 30.1, 30.2 are used.

[0036] A portion of the material to be crushed is screened out at the upper screen plate 30.1. This portion already has a sufficient particle size to no longer require further crushing in the crusher 10. In this respect, the screened portion can be guided through the bypass channel 31 through the crusher unit 40.

[0037] If a second screen plate 30.2 is used in the screening unit 30, an additional fine particle portion can be screened from the portion that accumulates below the screen plate 30.1. This fine particle portion is guided to a side discharge conveyor 32 below the screen plate 30.2. The fine particle portion is then diverted from the side discharge conveyor 32 and conveyed to a rock pile 70.2 located on the side of the machine.

[0038] like Figure 1 As shown, the screening unit 30 may be a vibrating screen with a screening drive 33. The screening drive 33 causes the screen plates 30.1 and / or 30.2 to vibrate. Due to the inclined arrangement of the screen plates 30.1 and 30.2 and in combination with the vibration motion, the material on the screen plates 30.1 and 30.2 is conveyed toward the crusher unit 40 or toward the bypass channel 31.

[0039] The material to be crushed, conveyed from the screen plate 30.1, is fed to the crusher unit 40, such as... Figure 1 As shown in the image.

[0040] The crusher unit 40 can be designed as a rotary impact crusher unit. However, it can also be any other crusher unit, such as a jaw crusher unit of a jaw crusher.

[0041] The crusher unit 40 has a crushing rotor 42 driven by a motor 41. Figure 1 In the image, the axis of rotation of the crushing rotor 42 is horizontal in the direction of image depth.

[0042] For example, the outer periphery of the crushing rotor 42 may be equipped with an impact rod 43. Opposite to the crushing rotor 42, a wall element may be provided, preferably in the form of an impact rocker arm 44.

[0043] As the crushing rotor 42 rotates, the impact rod 43 throws the material to be crushed outward. In doing so, the material impacts the impact rocker arm 44 and breaks due to high kinetic energy. When the material to be crushed has a sufficient particle size to allow material particles to pass through the gap between the radially outer ends of the impact rocker arm 44 and the impact rod 43, the crushed material exits the crushing unit 40 through the crusher outlet 45.

[0044] It is conceivable that in the area of ​​the crusher outlet 45, the crushed material delivered from the crusher unit 40 combines with the material delivered from the bypass channel 31 and is transferred to the belt conveyor 13. The belt conveyor 13 can be used to transport the material out of the working area of ​​the crusher unit 40.

[0045] As shown in the figure, the belt conveyor 13 may include an annular circulating conveyor belt having a slack side 13.3 and a tension side 13.4. The slack side 13.3 is used to capture and convey crushed material falling from the crusher outlet 45 of the crusher unit 40. At the belt ends, deflector rollers 13.1, 13.2 may be used to deflect the conveyor belt from the slack side 13.3 to the tension side 13.4 and vice versa. Guides, particularly support rollers, may be arranged in the area between the deflector rollers 13.1, 13.2 to change the conveying direction of the conveyor belt, shape the conveyor belt in some way, and / or support the conveyor belt.

[0046] The belt conveyor 13 has a belt driver that can be used to drive the belt conveyor 13. The belt driver may preferably be located at or in the area of ​​the discharge end 13.5 of the belt conveyor 13.

[0047] The belt conveyor 13 can be connected to a control device (e.g., via a belt drive) through a control line.

[0048] One or more additional belt conveyors 60 and / or return conveyors 80 may be used, which in principle have the same design as belt conveyor 13. In this regard, reference may be made to the above statements.

[0049] Magnet 14 can be positioned above the relaxation side 13.3 in the region between the feed end and the discharge end 13.5. Magnet 14 can be used to lift iron portions of crushed material and remove them from the conveying area of ​​belt conveyor 13.

[0050] A re-screening device 50 may be provided downstream of the belt conveyor 13. The crusher unit 50 has a screening housing 51 in which at least one screen plate 52 is installed. A housing base 53 is formed below the screen plate 52, which serves as a collection space for the material screened at the screen plate 52.

[0051] An opening in the lower housing portion forms a spatial connection with another belt conveyor 60. Here, the other belt conveyor 60 forms its feed area 61, in which the screened material in the feed area 61 is guided to the slack side of the other belt conveyor 60. The other belt conveyor 60 transports the screened material toward its discharge end 62. From there, the screened material is transferred to the rock pile 70.1.

[0052] Unscreened material is conveyed from screen plate 52 of the rescreening device 50 to branch belt 54. The branch belt 54 can also be designed as a belt conveyor, i.e., refer to the explanation given above regarding belt conveyor 13. Figure 1 In the image, the conveying direction of the branch belt 54 extends in the direction of image depth.

[0053] At its discharge end, branch belt 54 conveys unscreened material (also known as oversized material) to the feed area 81 of return conveyor 80. Return conveyor 80 (which may be a belt conveyor) transports the oversized material toward feed hopper 20. At its discharge end 82, return conveyor 80 transports the oversized material back into the material stream, particularly preferably into the material feed area. Thus, the oversized material can be returned to crushing unit 40 and crushed into the desired particle size.

[0054] Figure 2 The crushing unit 40 of an impact crusher is shown schematically in detail. The crushing rotor 42 is mounted in the housing of the crushing unit 40 and is rotatable about a rotation axis 42.1. The aforementioned motor 41 can be used to drive the crushing rotor 42.

[0055] Impact rod 43 is mounted on the rotor periphery 42.2. As the crushing rotor 42 rotates, the rotating impact rod 43 forms an impact circle 42.3. Belonging to this impact circle 42.3, impact rocker arm 44 is mounted opposite to the direction of movement of the crushed material and rotates in that direction. A rotary bearing 44.1 is used for this purpose. The rotary bearing 44.1 is used to mount the impact rocker arm 44 on the chassis 11.

[0056] The impact rocker arm 44 has a wall element 44.2 on its end facing the interior of the crusher unit 40. In the distal region 44.3, the wall element 44.2 faces the crushing rotor 42, such that a crushing gap S is formed in the region between the impact circle 42.3 and the distal region 44.3. The aforementioned crusher outlet 45 is formed below the crusher unit 40.

[0057] During operation, Figure 2 The material M to be crushed, schematically shown, is fed into the crusher unit 40. The material M is thrown outward by a rotating impact rod 43. It then impacts the wall element 44.2 of the impact rocker arm 44 and is crushed at both the impact rod 43 and the impact rocker arm 44. If the crushed material M has a particle size smaller than the width of the crushing gap S, it falls and exits the crusher unit 40 through the crusher outlet 45. However, if the particle size of the material M is not small enough, it is repeatedly thrown against the impact rocker arm 44 until sufficient crushing is achieved.

[0058] A hydraulic cylinder 90 is disposed in the region of the rear end 44.5 of the impact rocker arm 44. The hydraulic cylinder 90 is used to support the impact rocker arm 44 such that the width of the crushing gap S is maintained during crushing operation. Furthermore, the hydraulic cylinder 90 provides the option to change the width of the crushing gap S if required by the machine operator, as exemplarily described in DE 10 201 0 015 583B4.

[0059] The locking cylinder 90 has a cylinder housing 91. Within the cylinder housing 91, the piston is adjustablely guided. A piston rod 92 is connected to the piston. A piston rod end 93, supported by the piston rod 92, is used for connection to an impact rocker arm 44. In this configuration, the piston rod head 93 is rotatably connected to the impact rocker arm 44 via a bearing 44.4.

[0060] Figure 2 The hydraulic cylinder 90 includes hydraulic ports A and B. Hydraulic oil can be supplied to the hydraulic cylinder 90 through these hydraulic ports A and B.

[0061] According to the present invention, the hydraulic cylinder 90 includes an overload protection device. This is referred to below. Figure 3 and Figure 4 A more detailed description is required.

[0062] In these illustrations, the rear region of the hydraulic cylinder 90, which is away from the impact rocker arm 44, is shown in magnification.

[0063] The rear end of the hydraulic cylinder 90 is closed by a cover 94 in this rear region. When the cover 94 is removed, the pressure chamber of the hydraulic cylinder 90 formed between the cylinder base and the piston is accessible.

[0064] The connection region 95 is connected to the cylinder housing 91 of the hydraulic cylinder 90, and is preferably integrally molded to the cylinder housing 91. The connection region 95 also has a planar connection surface 95.1, which includes a channel opening. This channel opening forms a spatial connection with the pressure chamber of the hydraulic cylinder 90.

[0065] As shown in the figure, the explosion-proof panel 100 can be attached to the connection surface 95.1.

[0066] exist Figure 5 The explosion-proof panel 100 is shown in more detail below. As shown in this embodiment, the explosion-proof panel 100 has a flat back surface 101 and a flat front surface 102. The explosion-proof panel 101 has a rupture element 104 at its center. The rupture element 104 is integrally connected to the explosion-proof panel 100 via a predetermined break point 105, which is preferably formed circumferentially. The predetermined break point 105 may, for example, be in the form of a groove formed in the front surface 102 and / or the back surface 101.

[0067] The explosion-proof panel 100 has holes 103. In this exemplary embodiment, three holes 103 are used. Of course, it is also conceivable to use different numbers of holes 103, and in particular, it is also possible to use only one hole 103.

[0068] The explosion-proof panel 100 has a recess 106 in one area, which opens toward the edge area of ​​the explosion-proof panel 100 via an insertion section 107.

[0069] like Figure 3 and Figure 4 As shown, the explosion-proof panel 100 can be installed between the connection area 95 and the explosion-proof panel retainer 96.

[0070] At its end facing the explosion-proof panel 100, the explosion-proof panel retainer 96 has a pressure surface 96.2. This pressure surface 96.2 is used to place the explosion-proof panel retainer 96 on the back surface 101 of the explosion-proof panel 100. The explosion-proof panel 100 rests on the connection surface 95.1 of the connection area 95 at its front surface 102. When assembled, the front surface 102 of the explosion-proof panel 100 covers the conductive portion in the connection surface 95.1. For this purpose, the explosion-proof panel 100 is positioned such that the rupture element 104 rests above the conductive portion.

[0071] Figure 4The explosion-proof panel holder 96 is shown to have a through portion 96.3. In the assembled state, this through portion 96.3 also rests on the rupture element 104. A channel section of the explosion-proof panel holder 96 adjoins the through portion 96.3. In the region of the line connection 99.1 of the explosion-proof panel holder 96, this channel section leads to a hydraulic line 99. The hydraulic line 99 may be configured to include a clamping section 99.3 at its end opposite to the explosion-proof panel holder 96. The clamping section 99.3 may be used to form a pipe connection 99.2 to which another hydraulic line may be detachably connected.

[0072] The explosion-proof panel retainer 96 has four holes, three of which form bolt mounts 96.4 for fastening bolts 97. A drilled hole extends from the cover wall 96.1 to the pressure surface 96.2.

[0073] The retaining element 98 is inserted into the drill hole that is not occupied by the fastening bolt 97.

[0074] The retaining element 98 is also formed by bolts. The retaining element 98 is inserted through a drilled hole and bolted to a threaded mounting in the connection area 95, wherein the threaded mounting extends from the connection surface 95.1 into the connection area 95.

[0075] Similarly, three additional threaded mounting parts can be provided for the mounting bolts 97 in the connection area 95.

[0076] For installation of the explosion-proof panel 100, its insertion section 107 can slide onto the installed retaining element 98 in the area between the explosion-proof panel retainer 96 and the connection area 95, such as Figure 3 and Figure 4 As shown in the diagram. The movement is restricted by the recess 106, into which the retaining element 98 is fitted.

[0077] The recess 106, together with the pin section of the retaining element 98, forms a rotary bearing around which the explosion-proof panel 100 can rotate and move to its mounting position. Then the hole 103 is aligned with the bolt socket 96.4.

[0078] Now, the fastening bolt 97 can pass through the bolt mount 96.4 and the hole 103 of the explosion-proof panel 100, and be bolted into the threaded mount of the connection area 95. When the mounting bolt 97 is tightened, the explosion-proof panel 100 is clamped in the mounting position between the connection area 95 and the explosion-proof panel retainer 96 as intended. Finally, the retaining element 98 can also be further bolted into the assigned threaded mount, thus completing the assembly process.

[0079] If an overload occurs during operation, the rupture element 104 will rupture relative to the explosion-proof panel 100 in the area of ​​the predetermined break point 105. The hydraulic fluid in the pressure chamber of the hydraulic cylinder 90 will then expand through the guide portion of the connecting area 95 and the opening in the explosion-proof panel 100 released by the rupture element 104 into the channel section of the explosion-proof panel retainer 96. From there, the hydraulic fluid will be discharged via the hydraulic line 99.

[0080] It is now necessary to repair the overload protection device. Reversing the assembly process described above, the fastening bolt 97 can now be loosened and removed. The retaining element 98 is only released, but remains in place. Figure 4 The indicated position is that it is not removed. The explosion-proof panel 100 is now released and can be removed. For this purpose, the explosion-proof panel 100 can be easily pulled out from the retaining element 98, which exits the area of ​​the explosion-proof panel 100 via the insertion portion 107. It can be appreciated that when the explosion-proof panel retainer 96 is held in the connection area 95 by the retaining element 98, the explosion-proof panel retainer 96 is essentially held in its installed position. As described above, a new explosion-proof panel 100 can now be inserted and installed. The overload protection device is then ready for reuse.

[0081] Figure 6 A schematic diagram of an overload protection device is shown. As shown in the diagram, the pressure chamber is connected to the hydraulic system via hydraulic port A. Another chamber of the hydraulic cylinder 90 is formed on the end of the piston opposite to the pressure chamber. This other chamber is connected to the hydraulic system via hydraulic port B. To adjust the breaking gap S, hydraulic oil can circulate between the pressure chamber and the other chamber via hydraulic ports A and B.

Claims

1. An overload protection device for use in the hydraulic system of mineral material processing equipment. It includes hydraulic components configured to store and / or transport hydraulic fluid. The hydraulic component includes a connection region (95) having an opening for a passage of hydraulic fluid for the hydraulic system. The channel opening is covered by a replaceable explosion-proof panel (100). The explosion-proof panel retainer (96) is located on the back (101) of the explosion-proof panel (100) away from the connection area (95). And at least one of the fastening bolts (97) passes through the bolt mount (96.4) of the explosion-proof panel retainer (96) and through the hole (103) of the explosion-proof panel (100) aligned therewith, and is threaded into the thread mount of the connection area (95), such that in the assembled state, the explosion-proof panel (100) is held between the pressure surface (96.2) of the explosion-proof panel retainer (96) and the connection surface (95.1) of the connection area (95). Its features are, At least one retaining element (98) is provided, which holds the explosion-proof panel retainer (96) to the hydraulic element in the disassembled position when at least one fastening bolt (97) is loosened from the threaded mounting of the connection area (95) and the explosion-proof panel (100) is removed. The explosion-proof panel (100) includes one or more recesses (106) having a lateral insertion section (107) wherein the insertion section (107) opens the recess (106) toward a side extending laterally to the plate plane of the explosion-proof panel (100), such that a retaining element (98) can be laterally inserted into the recess (106) and thereby removed laterally to the plate plane of the explosion-proof panel (100).

2. The overload protection device according to claim 1, characterized in that, The retaining element (98) is formed by bolts and passes through the bolt mount (96.4) and recess (106) of the explosion-proof panel retainer (96), and is threaded into the threaded mount, which is introduced into the connection surface (95.1) of the connection area (95).

3. The overload protection device according to claim 1 or 2, characterized in that, The explosion-proof panel (100) rests on the connection surface (95.1) of the connection area (95) with its flat front side (102) and on the pressure surface (96.2) of the explosion-proof panel holder (96) with its relatively flat back side (101), and the explosion-proof panel (100) is held between the connection surface (95.1) and the pressure surface (96.2).

4. The overload protection device according to claim 1 or 2, characterized in that, The retaining element (98) and a section of the explosion-proof panel (100) form a rotary bearing, the axis of rotation of which is transverse to the connecting surface (95.1), such that when the fastening bolt (97) is removed, the explosion-proof panel (100) can rotate transverse to the connecting surface (95.1) and move away from its installation position.

5. The overload protection device according to claim 1 or 2, characterized in that, The explosion-proof panel (100) has a rupture element (104) with a predetermined break point (105).

6. The overload protection device according to claim 1 or 2, characterized in that, The explosion-proof panel retainer (96) has a conductive portion (96.3) which is covered by the explosion-proof panel (100) in the installed state of the explosion-proof panel retainer (96). A channel section of the explosion-proof panel retainer (96) is adjacent to the conductive portion (96.3) and leads to a pipeline connector (99.1), which connects a hydraulic line (99) to the explosion-proof panel retainer (96) or can be used to connect a hydraulic line (99) to the explosion-proof panel retainer (96).

7. The overload protection device according to claim 1 or 2, characterized in that, The hydraulic element is a hydraulic cylinder (90) having a cylinder housing (91) in which a piston is adjustablely guided, wherein a piston rod (92) is connected to the piston and a piston rod head (93) of the piston rod is guided out of the hydraulic cylinder (90), wherein the piston defines a pressure chamber and wherein the pressure chamber is spatially connected to a passage opening of a connection area (95).

8. The overload protection device according to claim 7, characterized in that, The hydraulic cylinder (90) is connected to the wall element (44.2) of the crusher unit (40) via a rotary bearing (44.4), and the wall element (44.2) is held rotatably on the chassis (11) via a bearing (44.1).

9. The overload protection device according to claim 1, characterized in that, The overload protection device is used in rotary impact crushers and jaw crushers.

10. The overload protection device according to claim 1, characterized in that, When at least one fastening bolt (97) is loosened from the threaded mounting of the connection area (95) and the explosion-proof panel (100) is removed, the retaining element (98) holds the explosion-proof panel retainer (96) in the connection area (95) to the hydraulic element in the disassembled position.

11. The overload protection device according to claim 2, characterized in that, The bolt is engaged into the recess (106) by means of the bolt section.

12. The overload protection device according to claim 4, characterized in that, The retaining element (98) and the recess (106) form a rotary bearing.

13. The overload protection device according to claim 5, characterized in that, The break point (105) is in the form of cross-sectional weakening.

14. The overload protection device according to claim 8, characterized in that, The piston rod (92) of the hydraulic cylinder (90) is connected to the wall element (44.2) of the crusher unit (40) via a rotary bearing (44.4).

15. The overload protection device according to claim 8, characterized in that, The wall element (44.2) is part of the impact rocker (44) of the rotary impact crusher.

16. A method for repairing an overload protection device for a mineral material processing equipment, wherein the overload protection device is designed according to any one of claims 1 to 15, wherein the fastening bolt (97) is loosened and removed, and a retaining element (98) retains the explosion-proof panel retainer (96) connected to the connection area (95), then the explosion-proof panel (100) of the overload protection device is removed, and a new explosion-proof panel (100) is inserted into the overload protection device, wherein the fastening bolt (97) is then reinserted into the bolt mounting (96.4) of the explosion-proof panel retainer (96) and reinserted into the hole (103) of the new explosion-proof panel (100), and threadedly connected to the threaded mounting of the connection area (95).

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