Noise encapsulation for impact crusher

Abstract

A method, system, and a plant for a horizontal shaft impact crusher (100), having a noise encapsulation (110) to form a secondary housing around both a movable primary housing and at least a portion of a crushing chamber. The noise encapsulation (110) has a movable part (120). The movable part (120) extends over a first portion (130) of the sides of the crushing chamber. The movable primary housing and the movable part are joined with a crusher body (150) pivotably between an opened state and a closed state. The movable part (120) carries along the movable primary housing (130) when pivoted from the closed state to the opened state, e.g., by a co-pivoting connector (160). A latch (170) releasably holds the movable primary housing and the movable part (120) of the noise encapsulation in the opened state, e.g., through the co-pivoting connector (160).

Description

[0001] NOISE ENCAPSULATION FOR IMPACT CRUSHER

[0002] TECHNICAL FIELD

[0003] The present disclosure generally relates to noise encapsulation for an impact crusher, particularly, though not exclusively, for a mobile impact crusher.

[0004] BACKGROUND

[0005] This section illustrates useful background information without admission of any technique described herein representative of the state of the art.

[0006] Impact crushers break stones and pieces of concrete or other mineral material by effectively throwing particles against a rigid surface or hitting stationary pieces by a moving surface Either way, the impacts cause significant and sudden noises. It is desirable to dampen such noises.

[0007] A simple solution would be to bury the entire crusher into a bunker, but with mobile crushers, that solution is impractical. Another simple solution is to place a dampening housing around the impact crusher, but the housing should not prevent operation of the crusher. Hence, it is also impractical to place the impact crusher into a sea container or similar structure that extends around the entire impact crusher.

[0008] It is also possible to improve dampening of noise through crushing chamber walls of the impact crusher by adding paddings or just mass to the crushing chamber walls, but that is also impractical: the crushing chamber may not be fully closed and still sound tends to conduct through a structure although lesser so when the structure is made thicker and heavier. However, a mobile crusher needs to be transportable. In road transport, for example, the increased weight is problematic. Hence, it is desirable to improve noise dampening of an impact crusher in some smarter way.

[0009] SUMMARY

[0010] The appended claims define the scope of protection. Any examples and technical descriptions of apparatuses, products and / or methods in the description and / or drawings not covered by the claims are presented not as embodiments of the invention but as background art or examples useful for understanding the invention.

[0011] According to a first example aspect there is provided a system for a horizontal shaft impact crusher, comprising a noise encapsulation configured to form a secondary housing around a movable primary housing and at least a portion of a crushing chamber of the impact crusher; wherein the noise encapsulation comprises a movable part; and the movable part of the noise encapsulation extends over a first portion of the sides of the impact crusher at the crushing chamber; the system further comprising a first pivot joint capable of pivotably joining with a body of the impact crusher the movable primary housing movably between an opened state and a closed state; and a co-pivoting connector for carrying along the movable part of the noise encapsulation when the movable primary housing is pivoted about the first pivot joint.

[0012] The system may further comprise a second pivot joint capable of pivotably joining with the body of the impact crusher the movable part of the noise encapsulation movably between the opened state and the closed state.

[0013] The second pivot joint may share same pivoting structure with the first pivot joint.

[0014] The second pivot joint may be coupled to the body of the impact crusher separated of the first pivot joint.

[0015] The system may further comprise a latch for releasably holding together with the co-pivoting connector the movable primary housing and the movable part of the noise encapsulation in the opened state.

[0016] The movable part of the noise encapsulation may be indirectly connected to the first pivot joint through the movable primary housing on pivoting the movable primary housing out of the closed state. The system may comprise a piggy bag structure configured to cause the movable primary housing to engage with and carry along the movable part of the noise encapsulation when opening the movable primary housing. The piggy bag structure may be configured to disconnect the movable part of the noise encapsulation from the movable primary housing on closing the movable primary housing so as to prevent conducting of noise from the movable primary housing to the movable part of the noise encapsulation. The movable part of the noise encapsulation may settle onto a crusher body before the movable primary housing reaches its closed state such that the movable primary housing becomes disconnected from the movable part of the noise encapsulation.

[0017] According to a second example aspect, there is provided a system for a horizontal shaft impact crusher, comprising a noise encapsulation configured to form a secondary housing around both a movable primary housing and at least a portion of a crushing chamber, the noise encapsulation comprising a movable part that extends over a first portion of opposite sides of the crushing chamber; and a joint joining the movable primary housing and the movable part a crusher body pivotably between an opened state and a closed state; wherein the movable part is configured to carry along the movable primary housing when pivoted from the closed state to the opened state, e.g., by a co-pivoting connector.

[0018] The system may further comprise a latch configured to releasably hold the movable primary housing and the movable part of the noise encapsulation in the opened state, e.g., through the co-pivoting connector.

[0019] The co-pivoting connector may be configured to disconnect from each other the movable primary housing and the movable part of the noise encapsulation when closed. The disconnecting may mitigate conducting of structure-borne sound. The co-pivoting connector may be configured to support the movable part of the noise encapsulation with by movable primary housing when the movable primary housing is opened.

[0020] The co-pivoting connector may comprise a connector shaft coupled to one of the movable primary housing and the movable part of the noise encapsulation, and a corresponding aperture defined by the remaining one of the movable primary housing and the movable part of the noise encapsulation. The aperture may be dimensioned loose for the connector shaft so as to avoid or reduce (e.g., mechanic or sound conducting) coupling between the movable primary housing and the movable part of the noise encapsulation, e.g., when the movable primary housing and the movable part of the noise encapsulation are in the closed state. The connector shaft may comprise a rubber or polymer layer. The rubber or polymer layer may reside outmost on the connector shaft so as to avoid direct coupling of two metal surfaces. The rubber or polymer layer may be a bushing or sleeve made of rubber or polymer.

[0021] The system may comprise a body lock configured to lock the movable primary housing to the closed state. The body lock may comprise a bolt that is pivotably attached to the body of the impact crusher such that the bolt can be turned into a slot formed by the movable primary housing and out of the slot for pivoting the movable primary housing to the opened state without entirely removing the bolt. The bolt may be screwed into a pivotable shaft that is supported by the body of the impact crusher, e.g., by two lugs that extend on two different sides of the bolt.

[0022] The movable part of the noise encapsulation may define a body lock opening for providing access to the body lock through the movable part of the noise encapsulation. The movable part of the noise encapsulation may further comprise a lock lid for covering the body lock opening. The lock lid may be hinged to a fixed part of the noise encapsulation. The lock lid may be hinged to a fixed part of the noise encapsulation with a hinge line configured to gravitationally keep the lock lid at an opened position. The lock lid may comprise a lid lock configured to lock the lock lid into a locked position.

[0023] The lock lid may extend over neighbouring portions of the fixed and movable parts of the noise encapsulation. The lock lid may be noise insulated, e.g., with seals mounted on at least three sides of a surface of the lock lid that faces the noise encapsulation. The lock lid may define a bolt head slot configured to surround and lock a head of the bolt of the body lock when locking the movable part of the noise encapsulation. The bolt head slot may be defined by two teeth having a gap therebetween. The gap may be wide enough to receive the bolt head. The gap may be too small for to allow the bolt head to rotate when in the bolt head slot. Advantageously, the dimensioning of the gap may prevent the bolt from becoming loose and falling off as a result of vibration. Further advantageously, the dimensioning of the gap may prevent closing the lock lid without tightening the bolt to a rotational angle at with the bolt head fits into the gap so as to motivate maintenance personnel to actually tighten the bolt before closing the lock lid. Moreover, when turned sideways, the bolt may prevent closing the lock lid. Advantageously, the failure to lock the movable primary housing may be visually indicated by the open lock lid.

[0024] The system may further comprise an adjustable aligning member part for supporting the movable part of the noise encapsulation in the closed state at a desired height. The adjustable aligning member may in part define a vertical position of the lock lid opening. The adjustable aligning member may be configured to laterally guide the movable part of the noise encapsulation on closing. The adjustable aligning member may comprise a wedge.

[0025] The fixed part of the noise encapsulation may be a portion of the body of the impact crusher. Alternatively, the fixed part of the noise encapsulation may cover a portion of the body of the impact crusher.

[0026] The latch member may comprise a pivoting arm. The pivoting arm may comprise a base end for pivotably connecting with the body of the impact crusher. The pivoting arm may comprise a remote end. The pivoting arm may comprise at the remote end a first latching part. The movable primary housing may comprise a second latching part. The second latching part may comprise an actuator end holder. The actuator end holder may comprise a second latching part configured to protrude from a side of the movable primary housing. The second latching part may define a holder slot for receiving an upper end of the actuator. The holder may comprise a hinge pin for the upper end of the actuator. The hinge pin may be configured to pass through the holder slot and the upper end of the actuator. The second latching part may have a rectangular lateral projection to a normal direction of the side of the movable primary housing. An outward face of the second latching part may be bevelled.

[0027] The pivoting arm may reside between the movable primary housing and the movable part of the noise encapsulation. The pivoting arm may reside in lateral direction at a central region of the movable primary housing. One or more latches may reside on respective one or more sides of the movable primary housing. One or more latches may reside on respective one or more sides of the movable part of the noise encapsulation. The movable part of the noise encapsulation may comprise a releasable attachable encapsulation portion comprising a second latching part opening configured to receive at least an outward facing end of the second latching part, releasable attachable encapsulation portion may be made of flexible material such as rubber.

[0028] The second latching part opening may be snugly fitted for the second latching part. The second latching part may comprise a rubber or polymer surface for reducing noise transmission to movable part of the noise encapsulation. The releasable attachable encapsulation portion may be attachable with a tolerance suited to accurately align the second latching part opening with the second latching part.

[0029] One of the first and second latching parts may define a groove for receiving a latch shaft. Another one of the latching parts may comprise latch shaft configured to engage with the groove. The groove may be configured to receive the latch shaft into a stable supporting position via which latch supports the movable part of the noise encapsulation and the movable primary housing in the opened state.

[0030] The releasable attachable encapsulation portion may enable placing the movable part of the noise encapsulation in place without collision with the latch shaft while the latch shaft extends through the movable part of the noise encapsulation when the releasable attachable encapsulation portion is mounted in place.

[0031] The latch shaft may further operate as the co-pivoting connector. Advantageously, on using the latch shaft as the co-pivoting connector, no separate structures are required for jointly moving the movable part of the noise encapsulation along the movable primary housing. In the alternative of providing a separate co-pivoting connector, the co-pivoting connector may be located much farther apart of the second pivot joint. In result, the co-pivoting connector experiences far smaller forces on opening the movable part of the noise encapsulation along the movable primary housing. Moreover, the releasable attachable encapsulation portion need not relay significant forces and hence need not be inconveniently heavy for manual mounting in place on assembling the noise encapsulation.

[0032] The system may comprise a sealing configured to acoustically seal the movable part of the noise encapsulation. The sealing may be configured to acoustically seal an interface between the movable part of the noise encapsulation and the movable primary housing. The sealing may be configured to acoustically seal the entire interface except at most E cm between the movable part of the noise encapsulation and the movable primary housing. E may be 0.5, 1 , 5, 10, or 20. The sealing may be configured to acoustically seal the entire interface between the movable part of the noise encapsulation and the movable primary housing.

[0033] The system may further comprise an actuator for jointly moving the movable part of the noise encapsulation along with the movable primary housing. The actuator may be or comprise a linear actuator. The actuator may be or comprise a hydraulic cylinder. The actuator may be or comprise a pneumatic cylinder. The actuator may be or comprise a jack. The actuator may be or comprise a winch. The winch may be a hydraulic winch. The winch may be an electric winch. The winch may be a manually operated winch.

[0034] The second pivot joint may reside at bottom of the movable part of the noise encapsulation and at a laterally distant edge in view of a rotating impactor when the movable part of the noise encapsulation is mounted to the horizontal shaft impact crusher.

[0035] The movable part of the noise encapsulation may extend over a rear side of the impact crusher. The rear side may reside such that the rear side extends over a horizontal plane that passes through a rotation axis of the impactor. The second pivot joint may reside below the horizontal plane that passes through a rotation axis of the impactor. A horizontal plane passing through the second pivot joint may pass through the impactor. A horizontal plane passing through the second pivot joint may pass through a lower half of the impactor. The movable part of the noise encapsulation may extend in the closed state vertically below the second pivot joint and horizontally beyond the impactor. Advantageously, by moving the movable part to the opened stated, most of the impactor may be exposed for maintenance from a side of the impactor. By moving the movable part to the opened state, at least 60 or 75 per cent of a height of the impactor may be exposed for maintenance from a side of the impactor.

[0036] The movable primary housing may be pivotably joined to a body of the horizontal shaft impact crusher through same pivot axis with the movable part of the noise encapsulation, optionally over a same main shaft. The movable primary housing may be attachable to the body of the horizontal shaft impact crusher at a position distant from the pivot axis so as to keep the movable primary housing in place. The movable primary housing may be configured to support wear parts against which the impactor is configured to hurl mineral material. The movable primary housing may be configured to support setting mechanism of the wear parts. The setting mechanism may comprise one or more hydraulic cylinders that extend through the movable primary housing and through the movable part of the noise encapsulation.

[0037] According to a third example aspect there is provided a method in a horizontal shaft impact crusher, comprising forming a secondary housing by a noise encapsulation around a movable primary housing and at least a portion of a crushing chamber of the impact crusher; reducing ambient noise emission from the crushing chamber of the impact crusher by a movable part of the noise encapsulation; and extending by the movable part of the noise encapsulation over a first portion of the sides of the impact crusher at the crushing chamber; pivotably joining by a first pivot joint the movable primary housing with a body of the impact crusher to be movable between an opened state and a closed state; and carrying by a co-pivoting connector along the movable part of the noise encapsulation when the movable primary housing is pivoted about the first pivot joint.

[0038] The method may further comprise pivotably joining by a second pivot joint the movable part of the noise encapsulation with the body of the impact crusher to be movable between an opened state and a closed state.

[0039] The method may further comprise releasably holding by a latch together with the co-pivoting connector the movable part of the noise encapsulation and the movable primary housing in the opened state.

[0040] According to a fourth example aspect, there is provided a method in a horizontal shaft impact crusher, comprising forming by a noise encapsulation a secondary housing around both a movable primary housing and at least a portion of a crushing chamber; reducing ambient noise emission from the crushing chamber of the impact crusher by a movable part of the noise encapsulation; joining the movable primary housing and the movable part a crusher body pivotably between an opened state and a closed state; and carrying along by the movable part the movable primary housing when pivoted from the closed state to the opened state, e.g., by a co-pivoting connector.

[0041] The method may further comprise releasably holding by a latch the movable primary housing and the movable part of the noise encapsulation in the opened state, e.g., through the co-pivoting connector.

[0042] According to a fifth example aspect there is provided an apparatus comprising means for performing the method of the third or fourth example aspect.

[0043] The horizontal shaft impact crusher may be a mobile horizontal shaft impact crusher.

[0044] Different non-binding example aspects and embodiments have been illustrated in the foregoing. The embodiments in the foregoing are used merely to explain selected aspects or steps that may be utilized in different implementations. Some embodiments may be presented only with reference to certain example aspects. It should be appreciated that corresponding embodiments may apply to other example aspects as well.

[0045] BRIEF DESCRIPTION OF THE FIGURES

[0046] Some example embodiments will be described with reference to the accompanying figures, in which:

[0047] Fig. 1 shows a system of an example embodiment with a horizontal shaft impact crusher in a closed state;

[0048] Fig. 2 shows the system of Fig. 1 with the horizontal shaft impact crusher in an opened state;

[0049] Fig. 3a shows the horizontal shaft impact crusher of Fig. 1 without a noise encapsulation and in a closed state;

[0050] Fig. 3b shows a first pivot joint and a second pivot joint of an example embodiment;

[0051] Figs. 4a and 4b show views of a co-pivoting connector of Figs. 1 and 2;

[0052] Figs. 5a to 5d show views of a body lock and of a lock lid of Figs. 1 and 2;

[0053] Fig. 6 shows a resting aligning member of a movable part of noise encapsulation of Figs. 1 and 2;

[0054] Figs. 7a to 7c show different alternative arrangements with a stable opened state;

[0055] Figs. 8a and 8b show two different views of two different mineral material processing plants comprising the system of Figs. 1 and 2 with the horizontal shaft impact crusher; and Fig. 9 shows a flow chart of a method of an example embodiment. DETAILED DESCRIPTION

[0056] In the following description, like reference signs denote like elements or steps.

[0057] Fig. 1 shows a system of an example embodiment with a horizontal shaft impact crusher 100 in a closed state, comprising a noise encapsulation 110 configured to form a secondary housing around a movable primary housing (Fig. 3: ref. 310) and at least a portion of a crushing chamber (Fig. 2: ref. 210) of the impact crusher; wherein the noise encapsulation 110 comprises a movable part 120; and the movable part 120 of the noise encapsulation extends over a first portion 130 of the sides of the impact crusher at the crushing chamber; the system further comprising a first pivot joint 140 capable of pivotably joining with a crusher body 150 of the impact crusher the movable primary housing 310 movably between an opened state (shown in Fig. 2) and a closed state (shown in Fig. 1 ); a co-pivoting connector 160 for carrying along the movable part 120 of the noise encapsulation when the movable primary housing 310 is pivoted about the pivot joint 140; and a latch 170 for releasably holding together with the co-pivoting connector 160 the movable primary housing 310 and the movable part 120 of the noise encapsulation in the opened state.

[0058] In an example embodiment, the system further comprises a second pivot joint 140’ (Fig. 3b) capable of pivotably joining with the crusher body 150 the movable part 120 of the noise encapsulation movably between the opened state (shown in Fig. 2) and the closed state (shown in Fig. 1 ).

[0059] In an example embodiment, in addition to the movable part 120 of the noise encapsulation, the noise encapsulation 110 comprises a fixed part 190.

[0060] In an example embodiment illustrated by Fig. 3, the movable primary housing 310 is directly connected to the pivot joint 140. In an example embodiment, the movable part 120 of the noise encapsulation is indirectly connected to the pivot joint 140 through the movable primary housing 310, for example, through the co-pivoting connector 160 (on both sides) and also some further inter-connects, such as using a second latch member 320 that is described with more detail in subsequent description with reference to Fig. 3, so that the movable part 120 of the noise encapsulation 110 gets suspended by the primary housing 310 when pivoting to the opened state. In an example embodiment, the movable part 120 of the noise encapsulation is directly connected to the pivot joint 140 and the movable primary housing 310 is indirectly connected to the pivot joint 140 through the movable part 120 of the noise encapsulation. In an example embodiment, both the movable primary housing 310 and the movable part 120 of the noise encapsulation are connected to the pivot joint 140 directly or via one or more intermediate parts. Fig. 3 also shows an actuator 330.

[0061] Fig. 3b shows further details relating to the first and second pivot joints 140, 140’. The crusher body 150 comprises a protrusion or first pivot shaft holder 342. The first pivot shaft holder 342 defines a hole that accommodates one end of a first pivot shaft 340. The first pivot shaft 340 extends through a lower end of the movable primary housing 310 so that the movable primary housing 310 can pivot about the first pivot shaft, either rotating with relation to the first pivot shaft 340 or together with the first pivot shaft. The second pivot is separated or disconnected from the first pivot. Here, a separate second pivot shaft holder 350 supports a second pivot shaft 360 that passes through a lower end of the movable part 120 of the noise encapsulation. In an example embodiment, the second pivot shaft holder 350 is connected to the crusher body 150 by a plate 370 of flexible material, such as rubber.

[0062] As shown by a joint symmetry line, the first pivot shaft 340 is coaxial with the second pivot shaft 360 in Fig. 3b. Coaxial pivot axis advantageously avoids sliding of the movable part 120 of the noise encapsulation with relation to the movable primary housing 310 on changing between the opened and closed states. However, in another example embodiment, the second pivot shaft 360 is not coaxial with the first pivot shaft 340.

[0063] In yet another example embodiment, the second pivot joint shares same pivoting structure with the first pivot joint. For example, the movable primary housing can be directly connected to the pivot joint. The movable part of the noise encapsulation can then be indirectly connected to the first pivot joint through the movable primary housing on pivoting the movable primary housing out of the closed state., e.g., with a piggy bag structure configured to cause the movable primary housing to engage with and carry along the movable part of the noise encapsulation when opening the movable primary housing. For example, the movable primary housing can be provided with abutting pads that abut with sufficiently strong counterparts on underside of the top of the movable part of the noise encapsulation, when the movable primary housing starts to pivot from the closed state towards the opened state. Then, the movable primary housing carries along the movable part of the noise encapsulation into the opened state such that the movable part of the noise encapsulation rests in a pivoted angle on top of the movable primary housing. Moreover, the movable part of the noise encapsulation separates from the movable primary housing when pivoting the movable primary housing back to its closed state. For example, the piggy bag structure can be configured to disconnect the movable part of the noise encapsulation from the movable primary housing on closing the movable primary housing so as to prevent conducting of noise from the movable primary housing to the movable part of the noise encapsulation.

[0064] Figs. 4a and 4b illustrate details of the co-pivoting connector 160. In an example embodiment, the co-pivoting connector 160 is configured to disconnect from each other the movable primary housing 310 and the movable part 120 of the noise encapsulation when closed. In an example embodiment, the co-pivoting connector 160 is configured to support the movable part 120 of the noise encapsulation by the movable primary housing 310 when the movable primary housing 310 is opened.

[0065] In this document, the disconnecting of the pivotable movable primary housing 310 and the movable part 120 of the noise encapsulation may refer to structure-borne sound disconnecting. There might be a slight coupling through air between these two structures, but noise emissions can still be significantly cut by eliminating or significantly reducing conducting of vibration from the movable primary housing 310 to the movable part 120 of the noise encapsulation.

[0066] In an example embodiment, the co-pivoting connector 160 comprises a connector shaft 410 coupled to one of the movable primary housing 310 and the movable part 120 of the noise encapsulation (to the movable part 120 in Figs. 4a and 4b). In an example embodiment, a corresponding aperture 430 is defined by the remaining one of the movable primary housing 310 and the movable part 120 of the noise encapsulation (by the primary housing 310 in Figs. 4a and 4b). In Figs. 4a and 4b, there is a sleeve assembly 420 that defines the aperture 430 that is configured to receive the connector shaft 410. In an example embodiment, the sleeve assembly 420 comprises a sleeve mounting plate 440 for attaching onto the primary housing 310, e.g., with bolts or by welding.

[0067] In an example embodiment, the aperture 430 is dimensioned loose for the connector shaft 410 so as to avoid or reduce coupling between the movable primary housing 310 and the movable part 120 of the noise encapsulation, e.g., when the movable primary housing 310 and the movable part 120 of the noise encapsulation are in the closed state. In an example embodiment, the connector shaft 410 comprises a rubber or polymer layer. In an example embodiment, the rubber or polymer layer resides outmost on the connector shaft 410 so as to avoid direct coupling of two metal surfaces. In an example embodiment, the rubber or polymer layer is a bushing or sleeve made of rubber or polymer. In an example embodiment, the aperture 430 is coated by a rubber or polymer or comprises a bushing made of such material so that the bushing fits tightly to the aperture 430, but there is some play between the inner surface of the bushing and the connector shaft 410.

[0068] In an example embodiment, the connector shaft 410 is provided as a part of a shaft assembly 450 to which the connector shaft 410 is attached, e.g., by welding.

[0069] In an example embodiment, the system comprises a body lock 220 (see Figs. 2, 5a, and 5b) configured to lock the movable primary housing 310 to the closed state. In an example embodiment, the body lock 220 comprises a bolt 510 that is pivotably attached to the crusher body 150 such that the bolt 510 can be turned into a bolt slot 520 formed by the movable primary housing 310 and out of the bolt slot 520 for pivoting the movable primary housing 310 to the opened state without entirely removing the bolt 510. In an example embodiment, the bolt 510 is screwed into a pivotable shaft that is supported by the crusher body 150, e.g., by two lugs that extend on two different sides of the bolt 510.

[0070] In an example embodiment, the movable part 120 of the noise encapsulation defines a body lock opening 530 for providing access to the body lock 220 through the movable part 120 of the noise encapsulation. In an example embodiment, the movable part 120 of the noise encapsulation further comprises a lock lid 180 for covering the body lock opening 530 (see Fig. 5c). In an example embodiment, the lock lid 180 is hinged to a fixed part of the noise encapsulation by hinges 540. In an example embodiment, the hinges 540 define a hinge line configured to gravitationally keep the lock lid 180 at an opened position as shown in Figs. 5a and 5b. In an example embodiment, the lock lid 180 comprises a lid lock configured to lock the lock lid 180 into a locked position, such as a lid bolt 550 that passes through an opening 516 on the lock lid, and a nut 540 fixed to the movable part of movable part 120 of the noise encapsulation, to which nut 540 the lid bolt 550 can be attached.

[0071] In an example embodiment, the lock lid 180 extends over neighbouring portions of the fixed part 190 and the movable part 120 of the noise encapsulation. In an example embodiment, the lock lid 180 is noise insulated, e.g., provided with seals 505 mounted on at least three sides of a surface of the lock lid 180 that faces the noise encapsulation, see Fig. 5a. In an example embodiment, the lock lid 180 defines a bolt head slot 514 configured to surround and lock a bolt head 512 of the body lock 220 when locking the movable part 120 of the noise encapsulation. In an example embodiment, the bolt head slot 514 is defined by two teeth having a gap therebetween. In an example embodiment, the gap is wide enough to receive the bolt head 512, while preferably also too small for to allow the bolt head 512 to rotate when in the bolt head slot 514.

[0072] Fig. 5d shows the lock lid 180 in the closed position in which the bolt head 512 is received by the bolt head slot 514. Fig. 6 shows an adjustable resting aligning member 610 for supporting the movable part 120 of the noise encapsulation in the closed state at a desired height. In an example embodiment, the adjustable aligning member in part defines a vertical position of the lock lid opening 530. In an example embodiment, the adjustable aligning member is configured to laterally guide the movable part 120 of the noise encapsulation on closing. For example, the adjustable aligning member may comprise a wedge. When similar wedges are arranged on both lateral sides of the movable part 120 of the noise encapsulation, the movable part 120 finds a lowest potential energy in a position defined by the wedges and so gets gravitationally aligned on closing.

[0073] The aligning member 610 may comprise an aligning shape on the abutting (e.g., horizontal) surface, on an adjacent (vertical) surface, or both the abutting and adjacent surfaces.

[0074] In an example embodiment, the wedge is a single sloping surface. In an example embodiment, the wedge is V-shaped. In this case, a single wedge on one side of the movable part 120 of the noise encapsulation may suffice for the lateral guiding of the movable part 120 of the noise encapsulation on its closing. This may be particularly useful by removing a need to adjust two different wedges for the same lateral position of the movable part 120 of the noise encapsulation.

[0075] Advantageously, the aligning member 610 may mitigate possibilities for the movable part 120 of the noise encapsulation to close with a lateral offset such that noise could leak out of the noise encapsulation. In an example embodiment, the fixed part 190 of the noise encapsulation is a portion of the crusher body 150. In an example embodiment, the fixed part 190 of the noise encapsulation covers a portion of the crusher body 150.

[0076] Let us further describe the latch 170 shown in Figs. 1 and 2. The latch 170 has a pivoting arm 171. In an example embodiment, the pivoting arm comprises a base end 172 for pivotably connecting with the crusher body 150. In an example embodiment, the pivoting arm 171 comprises a remote end 173. In an example embodiment, the pivoting arm 171 comprises at the remote end 173 a first latching part 174. In an example embodiment, the movable primary housing 310 comprises a second latching part 320. In an example embodiment, the second latching part 320 comprise the actuator end holder 322 mentioned with on describing Fig. 1. In an example embodiment, the second latching part 320 protrudes from a side of the movable primary housing 310. In an example embodiment, the second latching part 320 defines a holder slot for receiving an upper end of the actuator 330. In an example embodiment, the actuator end holder comprises a hinge pin for the upper end of the actuator 330. In an example embodiment, the hinge pin is configured to pass through the holder slot and the upper end of the actuator 330. In an example embodiment, the second latching part 320 has a rectangular lateral projection to a normal direction of the side of the movable primary housing 310. In an example embodiment, an outward face of the second latching part 320 is bevelled as seen in Fig. 3.

[0077] In an example embodiment, the movable part 120 of the noise encapsulation comprises a releasable attachable encapsulation portion 230, e.g., of flexible material such as rubber. In an example embodiment, the releasable attachable encapsulation portion 230 comprises a second latching part opening 232 configured to receive at least an outward facing end of the second latching part 320. In an example embodiment, the second latching part opening 232 is snugly fitted for the second latching part 320. In an example embodiment, the second latching part 320 comprises a rubber or polymer surface for reducing noise transmission to movable part 120 of the noise encapsulation. In an example embodiment, the releasable attachable encapsulation portion 230 is attachable with a tolerance suited to accurately align the second latching part opening 232 with the second latching part 320.

[0078] In an example embodiment, one of the first latching part 174 and the second latching part 320 defines a groove for receiving a latch shaft 324. In an example embodiment, another one of the first latching part 174 and the second latching part 320 comprises the latch shaft 324 configured to engage with the groove. In an example embodiment, the groove is configured to receive the latch shaft 324 into a stable supporting position via which latch 170 supports the movable part 120 of the noise encapsulation and the movable primary housing 310 in the opened state.

[0079] In an example embodiment, the releasable attachable encapsulation portion 230 enables mounting the movable part 120 of the noise encapsulation in place without collision with the latch shaft 324 while the latch shaft 324 extends through the movable part 120 of the noise encapsulation when the releasable attachable encapsulation portion 230 is mounted in place.

[0080] In an example embodiment, the latch is obsoleted by a geometry that enables opening the movable primary housing 310 and the movable part 120 of the noise encapsulation such that a centre of mass of the movable primary housing 310 and the movable part 120 of the noise encapsulation moves behind a support surface so that the movable primary housing 310 and the movable part 120 of the noise encapsulation rest stably in their open position. This can be implemented in different ways, including changing the geometry of the opening part, positioning of the pivot axis, or pivoting about one or more two-pivot shafts to effectively bring the pivot axis closer to the facing vertical surfaces. Figs. 7a to 7c illustrate different schematic examples on such arrangements in which the movable primary housing 310 and the movable part 120 of the noise encapsulation have a stable position in the closed state. In these arrangements, an actuator may first push the pivoting parts from an opened state towards the closed state, until the centre of mass bypasses the support surface area and then the actuator may start experiencing a pulling force. In an example embodiment, there is provided one or more abutments to prevent uncontrolled or excessive tilting.

[0081] In an example embodiment, the system further comprises the actuator 330 for jointly moving the movable part 120 of the noise encapsulation along with the movable primary housing 310. In an example embodiment, the actuator 330 is or comprises a linear actuator. In an example embodiment, the actuator is or comprises a hydraulic cylinder. In an example embodiment, the actuator is or comprises a pneumatic cylinder. In an example embodiment, the actuator is or comprises a jack. In an example embodiment, the actuator is or comprises a winch.

[0082] Figs. 8a and 8b show two different views of two different mobile mineral material processing plant 800. Fig. 8a shows a self-propelling mobile mineral material processing plant 800 equipped with crawler tracks, while Fig. 8b shows different mobile mineral material processing plant 800’ equipped with wheels for towing and with legs for operating-time stable supporting to ground. In both drawings, the mobile mineral processing plant comprises a feed hopper 810, the horizontal shaft impact crusher 820, and an exit conveyor 830, among other parts not separately discussed.

[0083] Fig. 9 shows a flow chart of a method an example embodiment in a horizontal shaft impact crusher. Fig. 9 illustrates possible steps including some optional steps while also further steps can be included and / or some of the steps can be performed more than once:

[0084] 910. forming a secondary housing by a noise encapsulation around a movable primary housing and at least a portion of a crushing chamber of the impact crusher;

[0085] 920. reducing ambient noise emission from the crushing chamber of the impact crusher by a movable part of the noise encapsulation;

[0086] 930. pivotably joining by a first pivot joint with a crusher body of the impact crusher the movable primary housing and the movable part of the noise encapsulation movably between an opened state and a closed state; and

[0087] 940. carrying by a co-pivoting connector along the movable part of the noise encapsulation when the movable primary housing is pivoted about the pivot joint.

[0088] In an example embodiment, there is provided a system for a horizontal shaft impact crusher 100, comprising a noise encapsulation 110 to form a secondary housing around both a movable primary housing 310 and at least a portion of a crushing chamber 210. The noise encapsulation 110 comprises a movable part 120. The movable part 120 extends over a first portion 130 of the sides of the crushing chamber. The movable primary housing 310 and the movable part are joined with a crusher body 150 pivotably between an opened state and a closed state. The movable part carries along the movable primary housing when pivoted from the closed state to the opened state, e.g., by a co-pivoting connector 160. A latch 170 releasably holds the movable primary housing 310 and the movable part 120 of the noise encapsulation in the opened state, e.g., through the co-pivoting connector 160.

[0089] Various embodiments have been presented. It should be appreciated that in this document, words comprise; include; and contain are each used as open-ended expressions with no intended exclusivity.

[0090] The foregoing description has provided by way of non-limiting examples of particular implementations and embodiments a full and informative description of the best mode presently contemplated by the inventors for carrying out the invention. It is however clear to a person skilled in the art that the invention is not restricted to details of the embodiments presented in the foregoing, but that it can be implemented in other embodiments using equivalent means or in different combinations of embodiments without deviating from the characteristics of the invention.

[0091] Furthermore, some of the features of the afore-disclosed example embodiments may be used to advantage without the corresponding use of other features. As such, the foregoing description shall be considered as merely illustrative of the principles of the present invention, and not in limitation thereof. Hence, the scope of the invention is only restricted by the appended patent claims.

Claims

CLAIMS1 . A system for a horizontal shaft impact crusher (100), comprising a noise encapsulation (110) that comprises a movable part (120); characterized in that the noise encapsulation (110) is configured to form a secondary housing around a movable primary housing (310) and at least a portion of a crushing chamber (210) of the impact crusher; wherein the movable part (120) of the noise encapsulation extends over a first portion (130) of the sides of the impact crusher at the crushing chamber; the system further comprising a first pivot joint (140) capable of pivotably joining with a crusher body (150) of the impact crusher the movable primary housing (310) movably between an opened state and a closed state; and a co-pivoting connector (160) for carrying along the movable part (120) of the noise encapsulation when the movable primary housing (310) is pivoted about the first pivot joint (140).

2. The system of claim 1 , further comprising a second pivot joint (140) capable of pivotably joining with the crusher body (150) of the impact crusher the movable part (120) of the noise encapsulation movably between the opened state and the closed state.

3. The system of claim 1 or 2, further comprising a latch (170) for releasably holding together with the co-pivoting connector (160) the movable primary housing (310) and the movable part (120) of the noise encapsulation in the opened state.

4. The system of claim 3, wherein latch further comprises a second latching part (320) that is configured enable supporting the movable part (120) of the noise encapsulation, when in the opened state, to the latch, and further configured to connect the movable primary housing (310) with an actuator configured to pivot the movable primary housing (310) and the moving part of the noise encapsulation between the closed state and the opened state.

5. The system of any one of preceding claims, wherein the co-pivoting connector (160) is configured to disconnect from each other the movable primary housing (310) and the movable part (120) of the noise encapsulation when closed.

6. The system of claim any one of the preceding claims, wherein the co-pivoting connector (160) is configured to support the movable part (120) of the noise encapsulation by the movable primary housing (310) when the movable primary housing (310) is opened.

7. The system of any one of preceding claims, wherein the co-pivoting connector (160) comprises a connector shaft (410) coupled to one of the movable primary housing (310) and the movable part (120) of the noise encapsulation; a corresponding aperture (430) is defined by the remaining one of the movable primary housing (310) and the movable part (120) of the noise encapsulation; and the aperture (430) is dimensioned loose for the connector shaft (410) so as to avoid or reduce coupling between the movable primary housing (310) and the movable part (120) of the noise encapsulation when the movable primary housing (310) and the movable part (120) of the noise encapsulation are in the closed state.

8. The system of claim 7, wherein the connector shaft (410) comprises a rubber or polymer layer.

9. The system of claim 7 or 8, wherein the aperture (430) is coated by a rubber or polymer or comprises a bushing made of such material.

10. The system of any one of preceding claims, wherein the system comprises a body lock (220) configured to lock the movable primary housing (310) to the closed state; the movable part (120) of the noise encapsulation defines a body lock opening (530) for providing access to the body lock (220) through the movable part (120) of the noise encapsulation; and the movable part (120) of the noise encapsulation further comprises a lock lid (180) for covering the body lock opening (530).11 . The system of claim 10, wherein the lock lid (180) is hinged to a fixed part of the noise encapsulation by hinges (540); and the hinges (540) define a hinge line configured to gravitationally keep the lock lid (180) at an opened position.

12. The system of claim 10 or 11 , wherein the body lock (220) comprises a bolt (510) that is pivotably attached to the crusher body (150) such that the bolt (510) can be turned into a bolt slot (520) formed by the movable primary housing (310) and out of the bolt slot (520) for pivoting the movable primary housing (310) to the opened state without entirely removing the bolt (510); the lock lid (180) defines a bolt head slot (514) configured to surround and lock a bolt head (512) of the body lock (220) when locking the movable part (120) of the noise encapsulation; andthe bolt head slot (514) has a width that is wide enough to receive the bolt head (512), and too small for to allow the bolt head (512) to rotate when in the bolt head slot (514).

13. The system of any one of preceding claims, wherein the system further comprises an adjustable resting aligning member (610) for supporting the movable part (120) of the noise encapsulation in the closed state at a given lateral position defined by the adjustable resting aligning member (610).

14. A mobile mineral material processing plant, comprising a system of any one of preceding claims; and a horizontal shaft impact crusher (100).

15. A method in a horizontal shaft impact crusher, comprising forming (910) a secondary housing by a noise encapsulation around a movable primary housing and at least a portion of a crushing chamber of the impact crusher; reducing (920) ambient noise emission from the crushing chamber of the impact crusher by a movable part of the noise encapsulation; pivotably joining (930) by a first pivot joint the movable primary housing with a crusher body of the impact crusher to be movable between an opened state and a closed state; and carrying (940) by a co-pivoting connector along the movable part of the noise encapsulation when the movable primary housing is pivoted about the first pivot joint.

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