Vibrating screen apparatus and liquid discharge unit

Abstract

A vibrating screen apparatus according to the present disclosure includes: a screen provided above an installation surface so as to be supported with respect to the installation surface; a vibrating mechanism configured to vibrate the screen with respect to the installation surface in order to sieve a supply object supplied onto the screen; and a liquid discharge unit configured to discharge liquid supplied from a liquid feeding mechanism to the supply object on the screen, the liquid discharge unit including: a first unit forming portion provided with discharge ports having positions fixed with respect to the installation surface at the time of discharging the liquid; and a second unit forming portion separable from the first unit forming portion.

Description

Description Title of Invention: VIBRATING SCREEN APPARATUS AND LIQUID DISCHARGE UNIT Technical Field

[0001] The present invention relates to a vibrating screen apparatus and a liquid discharge unit to be used in the vibrating screen apparatus. Background Art

[0002] In manufacturing sites of various industrial products, stone crushing sites, sites of waste processing, and the like, in order to sort a sorting target such as powder and particle, ore, or waste by size, vibrating screen apparatus are used. In a wet vibrating screen apparatus out of the vibrating screen apparatus, a liquid discharge unit arranged above a screen to be vibrated discharges liquid such as water to the sorting target on the screen. In this manner, an adhering matter adhering to the sorting target is washed away or agglomeration in the sorting target is eliminated. Thus, sorting is performed with high accuracy.

[0003] In Patent Literature 1, there is described a wet vibrating screen apparatus including a water jetting device corresponding to the liquid discharge unit described above. The water jetting device includes a track provided above a sieve main body, a running device which moves along the track, and a plurality of shower pipe lines provided to the running device so as to allow water discharging positions to a screen to be shifted. It is described that each of the shower pipe lines is formed by connecting water tubes including nozzles to each other so as to be separable from each other via a four-way joint and a movable partition port. Citation List Patent Literature

[0004] [Patent Literature 1]: CN 208527251 U Summary of Invention Technical Problem

[0005] Now, a wet vibrating screen apparatus 101 illustrated in FIG. 16 is described as an example. The vibrating screen apparatus 101 is an inclined vibrating screen apparatus, and includes a sieve main body 102 which is vibrated by a vibrating mechanism (not shown) and forms a sieve frame. In addition, the sieve main body 102 is provided with a screen 103 formed of, for example, a sieve mesh. A sieve surface (upper surface) of the sieve mesh is inclined with respect to the horizontal plane, and the sorting target supplied onto the sieve surface is sieved while sliding downward. FIG. 16 shows a longitudinal sectional front side of the vibrating screen apparatus 101 as viewed in this inclination direction, and the sorting target slides downward to move in a forward direction which is a direction on the front side of the drawing sheet. In addition, the vibrating screen apparatus 101 is provided with a liquid discharge unit 104 for discharging water. The liquid discharge unit 104 includes a water spraying portion 105, and a hose 106 for supplying water to the water spraying portion 105. The water spraying portion 105 is formed by connecting a plurality of pipes to each other, and includes discharge ports (not shown) for discharging water downward. The water spraying portion 105 is connected to the hose 106 having flexibility so that movement to be described later is not hindered.

[0006] The screen I 03 is removed from and mounted to the sieve main body 102 in order to perform replacement or maintenance. At the time of removing the screen 103, an operator lifts up and moves the screen 103 upward of the sieve main body 102, but the water spraying portion 105 above the screen 103 is required to be moved in order to ensure a work space for the operator and a movement space of the screen 103. However, in various plants and the like, in some cases, a large- sized wet vibrating screen apparatus 101 is used. In those cases, a water spraying portion 105 having a large size and a large weight is used. For movement of such a water spraying portion 105, the figure shows an example in which a framework 107 obtained by combining steel frames is permanently installed. The water spraying portion 105 is connected to a winch 108 provided to the framework 107 so that the water spraying portion 105 is pulled up. Further, in some cases, a movable crane may be used without providing such a permanently-installed framework 107. That is, the operator positions the crane in the vicinity of the vibrating screen apparatus 101, and causes the crane to lift the water spraying portion 105 as indicated by the chain line in the figure. However, when the framework 107 is provided, cost is required for installation and maintenance of the framework 107, and, when the crane is used, time and effort are required for connection of the water spraying portion 105 to the crane and an operation of the crane. Further, as described in detail later, when it is assumed that the vibrating screen apparatus 101 is provided in a building, in a case in which the framework 107 is provided or the crane is used, it is required to ensure an arrangement space for those pieces of equipment above the water spraying portion 105, and hence the height of the building becomes relatively large.

[0007] In the inclined vibrating screen apparatus, in order to move the unsieved sorting target from the top of the screen, the sieve frame is not configured to be provided on the entire periphery of the screen, but is configured to be opened in the inclination direction. Accordingly, at the time of performing replacement or maintenance of the screen, it is conceivable to move the screen laterally instead of moving the screen upward, and cause the screen to pass through this opened part of the sieve frame to pull out the screen outside of the sieve frame. However, in some cases, another apparatus or facility for processing the unsieved sorting target is provided at the moving destination, and thus a sufficient space cannot be ensured and such lateral movement cannot be performed. Moreover, the screen to be used in the vibrating screen apparatus has various forms, and, in some cases, the screen is configured to be uncapable of perfonning lateral movement in terms of design.

[0008] In addition, in the apparatus of Patent Literature 1 described above, the track and the running device provided above the screen hinder the work of mounting and removing the screen. Thus, the technology as described in Patent Literature 1 cannot solve the problems described above.

[0009] The present invention has been made in view of the above-mentioned circumstances, and has an object to provide a technology capable of reducing a space required above a vibrating screen apparatus at the time of mounting and removing a screen of the vibrating screen apparatus, and also reducing time and effort and cost of work. Solution to Problem

[0010] According to the present invention (first invention), there is provided a vibrating screen apparatus, including: a screen, provided above an installation surface so as to be supported with respect to the installation surface; a vibrating mechanism, configured to vibrate the screen with respect to the installation surface in order to sieve a supply object supplied onto the screen; and a liquid discharge unit, configured to discharge a liquid supplied from a liquid feeding mechanism to the supply object on the screen, wherein the liquid discharge unit includes: a first unit forming portion, provided with discharge ports having positions fixed with respect to the installation surface at a time of discharging the liquid; and a second unit forming portion, separable from the first unit forming portion.

[0011] According to the vibrating screen apparatus of a second invention, in the vibrating screen apparatus of the first invention, the liquid discharge unit includes: a plurality of liquid spraying pipes, each extending in a transverse direction and each including a first part in which the discharge ports are formed; a distribution pipe, extending in the transverse direction so as to cross an extension direction of the first part, the distribution pipe including a connection portion to which one end of a corresponding one of the plurality ofliquid spraying pipes is to be connected along the extension direction in order to distribute the liquid to each of the plurality of liquid spraying pipes; and a supply pipe, configured to supply the liquid to the distribution pipe, the second unit forming portion is formed of the supply pipe, and the first unit forming portion is formed only of the plurality of liquid spraying pipes out of the plurality of liquid spraying pipes and the distribution pipe, or formed of the plurality of liquid spraying pipes and the distribution pipe.

[0012] According to the vibrating screen apparatus of a third invention, in the vibrating screen apparatus of the second invention, the second unit forming portion is formed of the supply pipe and the distribution pipe, and the first unit forming portion is formed of the plurality of liquid spraying pipes, and is individually separable from the distribution pipe.

[0013] According to the vibrating screen apparatus of a fourth invention, in the vibrating screen apparatus of any one of the first to third inventions, the second unit forming portion includes a pipe forming a flow path on an upstream side of a pipe forming the first unit forming portion, one pipe out of the pipe forming the first unit forming portion and a pipe forming the second unit forming portion is provided with an engaging portion and an engagement forming portion, and another pipe out of the pipe forming the first unit forming portion and the pipe forming the second unit forming portion is provided with an engaged portion, and under a state in which the one pipe and the another pipe are in contact with each other, the engagement forming portion is moved between a first position and a second position while keeping a state of being connected to the one pipe, and thus formation of engagement between the engaging portion and the engaged portion and release of the engagement for performing the separation are switched.

[0014] According to the vibrating screen apparatus of a fifth invention, in the vibrating screen apparatus of the fourth invention, the liquid discharge unit includes: a plurality of liquid spraying pipes forming the first unit forming portion, the plurality of liquid spraying pipes each including a first part which extends in a transverse direction and in which the discharge ports are formed; and a distribution pipe extending in the transverse direction so as to cross an extension direction of the first part, the distribution pipe forming the second unit fanning portion and including a connection portion to which one end of a corresponding one of the plurality of liquid spraying pipes is to be connected along the extension direction in order to distribute the liquid to each of the plurality of liquid spraying pipes, each of the plurality of liquid spraying pipes includes a second part which is bent with respect to the first part so as to extend in a longitudinal direction, the connection portion is a pipe, and includes a third part which extends in the longitudinal direction and is positioned above the second part, and the engaging portion and the engagement forming portion are provided in one of the second part or the third part, and the engaged portion is provided in another one of the second part or the third part.

[0015] According to the vibrating screen apparatus of a sixth invention, in the vibrating screen apparatus of any one of the first to fifth inventions, the screen includes a sieve surface which is inclined with respect to a horizontal plane, and the vibrating screen apparatus further includes a sieve frame which is opened in an inclination direction so that the supply object sliding downward on the sieve surface is allowed to move outside of a top of the screen, the sieve frame being provided with the screen in a mountable and removable manner and being configured to be vibrated together with the screen by the vibrating mechanism. According to the vibrating screen apparatus of a seventh invention, in the vibrating screen apparatus of the sixth invention, the first part of each of the plurality of liquid spraying pipes is positioned in an inner region surrounded by the sieve frame. According to the vibrating screen apparatus of an eighth invention, in the vibrating screen apparatus of the seventh invention, the third part has a lower end portion positioned in the inner region.

[0016] According to the present invention (ninth invention), there is provided a liquid discharge unit, which is configured to feed a liquid to a vibrating screen apparatus including: a screen provided above an installation surface so as to be supported with respect to the installation surface; and a vibrating mechanism configured to vibrate the screen with respect to the installation surface in order to sieve a supply object supplied onto the screen, the liquid discharge unit being configured to discharge the liquid supplied from a liquid feeding mechanism to the supply object on the screen, wherein the liquid discharge unit includes: a first unit forming portion, provided with discharge ports having positions fixed with respect to the installation surface at a time of discharging the liquid; and a second unit forming portion, separable from the first unit forming portion. Advantageous Effects of Invention

[0017] According to the present invention, it is possible to reduce a space required above a vibrating screen apparatus at the time of mounting and removing a screen of the vibrating screen apparatus, and also to reduce time and effort and cost of work. Brief Description of Drawings

[0018] FIG. 1 is a longitudinal sectional side view of a building including a vibrating screen apparatus according to one embodiment of the present invention. FIG. 2 is a plan view of the vibrating screen apparatus. FIG. 3 is a longitudinal sectional front view of the vibrating screen apparatus. FIG. 4 is a perspective view of the vibrating screen apparatus. FIG. 5 is a longitudinal sectional side view of a distribution pipe and a water spraying pipe included in a liquid discharge unit in the vibrating screen apparatus. FIG. 6 is a longitudinal sectional side view of the distribution pipe and the water spraying pipe. FIG. 7 is an explanatory view for illustrating a procedure of mounting and removing the water spraying pipe in the liquid discharge unit. FIG. 8 is an explanatory view for illustrating a procedure of mounting and removing a screen in the vibrating screen apparatus. FIG. 9 is an explanatory view for illustrating a procedure of mounting and removing the screen in the vibrating screen apparatus. FIG. 10 is a longitudinal sectional side view of a building in a comparative example. FIG. 11 is a plan view for illustrating a first modification example of the liquid discharge unit. FIG. 12 is a longitudinal sectional front view of a vibrating screen apparatus including the liquid discharge unit of the first modification example. FIG. 13 is a longitudinal sectional front view of a vibrating screen apparatus including a liquid discharge unit of a second modification example. FIG. 14 is a perspective view for illustrating an engagement forming mechanism of the liquid discharge unit of the second modification example. FIG. 15 is a longitudinal sectional front view of a vibrating screen apparatus including a liquid discharge unit of a third modification example. FIG. 16 is a longitudinal sectional front view of a related-art vibrating screen apparatus. Description of Embodiments

[0019] A building 1 in which a vibrating screen apparatus 2 according to one embodiment of the present invention is provided is described with reference to FIG. 1 being a longitudinal sectional side view. The building 1 is provided in a chemical plant, and a granular material 20 for manufacture of a chemical product is supplied as a sorting target (supply object) to the vibrating screen apparatus 2. The vibrating screen apparatus 2 is a wet and inclined vibrating screen apparatus, and is provided on a floor surface 10 of a room 11 in the building 1. Accordingly, the floor surface 10 forms an installation surface on which the vibrating screen apparatus 2 is installed. In the room 11, a hopper 13, a conveyor 14, and a chute 15 are provided. Further, a filter press 16 is provided in a room 12 on a floor above a floor including the room 11, and a tank 19 is provided in a room 18 on a floor below the floor including the room 11.

[0020] The granular material 20 is included in a dehydrated cake generated from a slurry in the filter press 16, and this dehydrated cake is supplied to the conveyor 14 via the hopper 13. Then, the cake is supplied to the chute 15 to be put into the vibrating screen apparatus 2. A material sieved by the vibrating screen apparatus 2 in the granular material 20 of the dehydrated cake is stored as a slurry into the tank 19 via, for example, a chute or a pipe. In FIG. 1, for the sake of convenience, the sieved granular material 20 is illustrated as being dropped and supplied directly to the tank 19. In addition to storage to the tank 19 as described above, in some cases, the slurry is supplied to equipment for performing processing of the next step via a pump. The unsieved granular material 20 is transported to a carrier 17 outside of the building 1, via another conveyance mechanism (not shown) formed of a conveyor or the like, and is sent to a predetermined processing facility.

[0021] The vibrating screen apparatus 2 is described also with reference to FIG. 2, FIG. 3, and FIG. 4 which are a plan view, a longitudinal sectional front view, and a perspective view, respectively. In each figure, an X direction (right-left direction) and a Y direction (front-rear direction) are a horizontal direction, a Z direction is a vertical direction, Y' is an inclination direction, and Z' is a direction orthogonal to the X and Y' directions. The inclination direction is a direction along a screen 4 to be described later. The upper side in the inclination direction is sometimes referred to as "inclination upper side", and the lower side in the inclination direction is sometimes referred to as "inclination lower side".

[0022] The vibrating screen apparatus 2 includes a sieve main body 3 and a liquid discharge unit 5, and the screen 4 is provided in a mountable and removable manner to the sieve main body 3. The sieve main body 3 includes side walls 32, a rear wall 33, a bottom portion grating 34, a vibrating mechanism 30, and support portions 37. When a structure formed of the side walls 32, the rear wall 33, and the bottom portion grating 34 is regarded as a base body 31, the base body 31 has a configuration in which an upper wall and a front wall are removed from a casing having a rectangular shape that is longer in the front-rear direction than in the right-left direction and the bottom portion grating 34 is provided in place of a bottom wall. The sieving object passes through the bottom portion grating 34 to be dropped downward of the base body 31. A region located above the bottom portion grating 34 and surrounded by the side walls 32 and the rear wall 33 is referred to as "ilmer region 35". Projecting portions 36 projecting to the inner region 35 are provided on the respective side walls 32, and the projecting portions 36 extend along the length direction of the side walls 32.

[0023] On the outer side of the inner region 35, two support portions 37 are connected to each of the side walls 32 at positions separated from each other in the front-rear direction. Four support portions 37 in total support the base body 31, and the bottom portion grating 34 is separated from the floor surface 10 and inclined with the rear side being positioned to be higher than the front side. Each of the support portions 37 includes a base portion 37A provided on the floor surface 10, a connection portion 37B connected to the side wall 32 and provided above the base portion 37A, and a coil-shaped spring 37C having a winding axis along the vertical direction. The spring 37C is interposed between the base portion 37A and the connection portion 37B to connect the base portion 37A and the connection portion 37B to each other in such a manner that the sieve main body 3 can be vibrated by the vibrating mechanism 30 to be described later.

[0024] Parts of upper ends of the two side walls 32 rise upward so as to be formed as protruding portions 21, and the protruding portions 21 of the respective side walls 32 are opposed to each other in the right-left direction. The vibrating mechanism 30 includes a drum 22, an unbalanced weight, and a motor 23, and the drum 22 is provided so as to extend in the right-left direction between the protruding portions 21. The sieve main body 3 is vibrated together with the screen 4 due to an action of a centrifugal force caused by rotating the unbalanced weight provided in the drum 22 by the motor 23 provided in one of the two protruding portions 21.

[0025] The screen 4 includes a sieve mesh 41 and two members 42 for support. The members 42 for support are members that are long in the front-rear direction, and are provided separately in the right-left direction. The sieve mesh 41 is provided so as to be stretched between the two members 42 for support. Each of the members 42 for support is supported on the projecting portion 36. The sieve mesh 41 is provided along the X direction and the Y' direction, and is provided so as to be opposed to an upper surface of the bottom portion grating 34 and divide the inner region 35 into upper and lower parts. With the sieve mesh 41 being provided as described above, parts of the side walls 32 and the rear wall 33 on the upper side of the sieve mesh 41 are formed as a sieve frame. Further, the inclination lower side of the sieve frame is opened, and the granular material 20 that has not been sieved during sliding downward on the sieve mesh 41 moves from the top of the sieve mesh 41 to the outside of the sieve frame.

[0026] When each of the members 42 for support is viewed in the Y' direction, an end portion on the side opposite to the side connected to the sieve mesh 41 is folded upward, and thus the member 42 for support is formed into an overturned V-shape. A region surrounded by the V-shape forms a gap opened toward the side connected to the sieve mesh 41. In addition, on the side of each of the side walls 32 of the sieve main body 3 facing the inner region 35, a fixing member 38 is provided in a mountable and removable manner via a fixing tool (not shown). When parts of the fixing members 38 mounted to the side walls 32 as described above are fitted into the gaps formed by the members 42 for support placed on the projecting portions 36, the screen 4 is fixed to the sieve main body 3. A lower end of the chute 15 is opened on the rear side of the upper surface (sieve surface) of the sieve mesh 41 fixed as described above, and the dehydrated cake including the granular material 20 described above is supplied to the sieve surface to slide downward on the sieve surface.

[0027] Subsequently, the liquid discharge unit 5 is described. The liquid discharge unit 5 is a unit for forming a flow path of water on the downstream side of a pump 51 which is a liquid feeding mechanism, to thereby discharge the water supplied from a water supply source 52 by the pump 51 so as to be sprayed onto the sieve mesh 41. Further, for the purpose of preventing damage and deterioration, the liquid discharge unit 5 is provided without being connected to the sieve main body 3, so as to be prevented from being vibrated by the vibrating mechanism 30.

[0028] The liquid discharge unit 5 includes a supply pipe 50, two composite pipes 6, and six water spraying pipes 7 which are liquid spraying pipes. Water supplied by the pump 51 to the supply pipe 50 flows through the composite pipes 6 and the water spraying pipes 7 in the stated order so as to be discharged from discharge ports 70 provided in the water spraying pipes 7. The composite pipes 6 and the water spraying pipes 7 are collectively referred to as "water spraying portion 71".

[0029] The outline of the water spraying portion 71 is described. The water spraying portion 71 is arranged so as to be shifted to the inclination lower side with respect to the vibrating mechanism 30. The water spraying portion 71 has a bilaterally symmetrical configuration, and is fonned into a substantial ladder shape in plan view. The water spraying pipe 7 forms a step of the ladder, and the composite pipe 6 forms a frame and a part of the step of the ladder. The six water spraying pipes 7 are arranged side by side along the Y' direction above the sieve mesh 41, and each include a first part 72 which extends in the X direction and in which the discharge ports 70 are formed. The composite pipes 6 are respectively arranged on both of the right and left sides of the sieve main body 3, and are each connected to the six water spraying pipes 7. The above-mentioned supply pipe 50 is connected to only one of the two composite pipes 6. Water supplied from the one composite pipe 6 to the water spraying pipes 7 flows toward another composite pipe 6, but is consumed by being emitted from the water spraying pipes 7 before reaching the another composite pipe 6. Accordingly, the another composite pipe 6 is not provided for the purpose of causing the water to flow therethrough, and is provided in order to support the water spraying pipes 7 together with the one composite pipe 6.

[0030] The composite pipe 6 which is a second unit forming portion includes an accompanying portion 60 for forming engagement with the water spraying pipe 7 which is a first unit forming portion. The water spraying pipe 7 can be fixed to the composite pipe 6 under a state in which the engagement has been formed, and the water spraying pipe 7 can be separated from the composite pipe 6 under a state in which the engagement has been released. Accordingly, in the water spraying portion 71, the water spraying pipes 7 are individually separable. The mounting and removing of the water spraying pipe 7 are performed in order to mount and remove the screen 4 to and from the sieve main body 3, and the mounting and removing of the screen 4 can be performed under a state in which the water spraying pipes 7 have been separated from the composite pipes 6. FIG. 2 to FIG. 4 show a state in which this engagement is formed and the water spraying pipes 7 are fixed to the composite pipes 6.

[0031] The composite pipe 6 is further described. The composite pipe 6 includes a distribution pipe 61, a collection pipe 62, and connection pipes 63. The distribution pipe 61 is arranged outside of the base body 31 of the sieve main body 3 in plan view and above the base body 31, and extends along the inclination direction. A center portion of the distribution pipe 61 in an extension direction extends horizontally toward the side opposite to the side on which the base body 31 is positioned in the right-left direction so as to form the collection pipe 62 which is a short pipe. The collection pipe 62 is supported by a support column 53 extending from the floor surface 10. In addition, six portions of the distribution pipe 61 separated from each other in the extension direction extend horizontally toward the side on which the base body 31 is positioned in the right-left direction so as to form the connection pipes 63.

[0032] The connection pipes 63 extending horizontally as described above are bent above right and left ends of the inner region 35 so as to extend vertically downward. A lower end portion of each of the connection pipes 63 enters the inner region 35, and is positioned above the screen 4. The above- mentioned accompanying portion 60 is provided on an outer periphery of the lower end portion of each of the connection pipes 63. Details of the accompanying portion 60 are described later. Two connection pipes 63 arranged side by side in the right-left direction form one pair. Accordingly, six pairs of connection pipes 63 are provided. In addition, one water spraying pipe 7 is connected to two connection pipes 63 forming the same pair. Accordingly, the connection pipe 63 forms a connection portion provided in the distribution pipe 61 in order to connect the water spraying pipe 7.

[0033] A flange 50A formed at a downstream end of the supply pipe 50 described above and a flange 62A formed at an upstream end of the collection pipe 62 are connected to each other. The water supplied from the supply pipe 50 to the collection pipe 62 is distributed and supplied to the connection pipes 63 via the distribution pipe 61 so as to be supplied to the water spraying pipes 7. Accordingly, the distribution pipe 61 is a so-called header pipe for performing distribution to the connection pipes 63 as described above. Further, the flange 62A of the collection pipe 62 in the composite pipe 6 not connected to the supply pipe 50 is illustrated as being connected to the flange 50A formed at a downstream end of a pipe 59.

[0034] The water spraying pipe 7 is positioned in the inner region 35, and has a configuration in which both end portions of a straight pipe are bent in the same direction. More specifically, the water spraying pipe 7 includes the first part 72 horizontally extending in the right-left direction above the screen 4, and a second part 73 that is bent with respect to the first part 72 so as to extend in the vertical direction, that is, a longitudinal direction. As described above, the extension direction of the first part 72 and the extension direction of the distribution pipe 61 described above are each a transverse direction, and those extension directions have a relationship of crossing each other (not parallel to each other).

[0035] In addition, a size of an outer diameter of an upper end portion of the second part 73 is slightly smaller than a size of an inner diameter of the lower end portion of the connection pipe 63, and the upper end portion of the second part 73 is inserted into the lower end portion of the connection pipe 63 so as to enter the connection pipe 63. Accordingly, the connection pipe 63 which is a third part is positioned above the second part 73. Further, on an outer peripheral surface of the upper end portion of the second part 73 to be inserted as described above, an annular groove 74 (not shown in FIG. 1 to FIG. 4) is formed along the outer peripheral surface. This annular groove 74 forms an engaged portion for fanning the engagement with the composite pipe 6 through use of the above- mentioned accompanying portion 60. In a lower surface of the first part 72, the discharge ports 70 are provided at intervals in the extension direction of the first part 72, and the discharge ports 70 are opened toward the sieve mesh 41 of the screen 4. The first part 72 is arranged so as to overlap the screen 4 in plan view so that water can be discharged from the discharge ports 70 to the granular material 20 sliding downward on the screen 4.

[0036] With reference to FIG. 5 and FIG. 6 which are longitudinal sectional side views of the connection pipes 63 in the composite pipes 6 and the water spraying pipe 7, the engagement formed between each of the connection pipes 63 and the water spraying pipe 7 is described. FIG. 5 shows a state in which the engagement is formed in the same manner as in FIG. 2 to FIG. 4 and the water spraying pipe 7 is fixed to the connection pipes 63. FIG. 6 shows a state in which the engagement is released and the water spraying pipe 7 is removed from the connection pipes 63. At an end portion of each of the connection pipes 63, a plurality of through holes are formed at intervals in a circumferential direction, and a ball 64 is provided in each of the through holes. In an outer peripheral surface of the connection pipe 63, a part on the upper side with respect to the through holes and a lower end portion protrude outward of the pipe to form a step 65 and a step 66. A sleeve 67 surrounding the end portion of the connection pipe 63 is provided, and an annular protrusion 68 protruding between the step 65 and the step 66 is formed on an inner peripheral surface of the sleeve 67. A coil spring 69 surrounding the connection pipe 63 is provided between the step 65 and the sleeve 67. The above-mentioned accompanying portion 60 includes the sleeve 67, the balls 64, and the coil spring 69.

[0037] The sleeve 67 which is an engagement forming portion is biased by the coil spring 69 to a lower position (second position) illustrated in FIG. 5, but an operator can move the sleeve 67 against the biasing force of the coil spring 69 to an upper position (first position) illustrated in FIG. 6. Under a state in which the sleeve 67 is positioned at the lower position, the annular protrusion 68 and the balls 64 are aligned in height, and the annular protrusion 68 restricts the positions of the balls 64 so that the balls 64 protrude to the inner peripheral surface of the connection pipe 63. Under a state in which the sleeve 67 is positioned at the upper position, the annular protrusion 68 and the balls 64 are misaligned in height so that the balls 64 can move to positions not protruding to the ilmer peripheral surface of the connection pipe 63.

[0038] As illustrated in FIG. 5, when the sleeve 67 is positioned at the lower position under a state in which the second part 73 of the water spraying pipe 7 is inserted into the connection pipe 63 of the composite pipe 6, the balls 64 which are an engaging portion are fitted into the annular groove 74 of the second part 73, and thus engagement is formed between the balls 64 and the annular groove 74. In this manner, the water spraying pipe 7 is fixed to the composite pipe 6. From this state, when the sleeve 67 is moved to the upper position as illustrated in FIG. 6, the engagement is released. At the time of releasing the engagement, the second part 73 of the water spraying pipe 7 can be pulled out and removed from the connection pipe 63. With the above-mentioned configuration, when the sleeve 67 is moved between the upper position and the lower position, the sleeve 67 is prevented from dropping from the connection pipe 63, and a state in which the sleeve 67 is connected to the connection pipe 63 is kept.

[0039] An operation of the above-mentioned vibrating screen apparatus 2 is described. Under a state in which the sieve main body 3 is vibrated by the vibrating mechanism 30, the granular material 20 is supplied onto the screen 4. Under a state in which the sieve main body 3 is vibrated as described above, the pump 51 is operated so that water (indicated by the dotted lines in FIG. 3 and FIG. 4) is discharged onto the screen 4 from the discharge ports 70 of the water spraying pipes 7, thereby supplying the water to the granular material 20. In this manner, the granular material 20 is sieved while being washed. A part of the granular material 20 is sieved and passed through the bottom portion grating 34 in a state of a slurry. A part of the granular material 20 is not sieved and is moved to the outside of the sieve frame. The water spraying pipe 7 is fixed to the composite pipe 6 so as to be supported with respect to the floor surface 10 via the support column 53 supporting the composite pipe 6. Accordingly, the positions of the discharge ports 70 at the time of discharging water as described above are fixed without being moved with respect to the floor surface 10.

[0040] Subsequently, a procedure of removing the screen 4 from the sieve main body 3 is described with reference to explanatory views of FIG. 7 to FIG. 9. Similarly to FIG. 3, FIG. 7 to FIG. 9 are each a longitudinal sectional view of the vibrating screen apparatus 2 as viewed in the inclination direction. The operator moves each of the sleeves 67 of the two connection pipes 63 forming the same pair from the lower position to the upper position as described with reference to FIG. 5 and FIG. 6 so as to release the engagement between the composite pipe 6 and the water spraying pipe 7. Then, through use of a space formed between the water spraying pipes 7 and the screen 4 in order to cause the granular material 20 to slide downward, the water spraying pipe 7 is pulled out and removed from the composite pipes 6 (FIG. 7). This removal of the water spraying pipe 7 is performed in order from, for example, one end side to another end side in the inclination direction so that another water spraying pipe 7 is prevented from becoming an obstacle at the time of removal.

[0041] Then, after all of the water spraying pipes 7 are removed, the operator removes the fixing members 38 that fix the screen 4 to the base body 31 of the sieve main body 3 from the base body 31, and inclines the screen 4 so as not to interfere with the connection pipes 63 (FIG. 8). Further, the operator pulls the screen 4 upward of the sieve main body 3 to take out the screen 4 from the inner region 35 of the base body 31 (FIG. 9). At the time of mounting the screen 4 to the sieve main body 3, the work steps are performed in an order opposite to the series of work steps described above.

[0042] As described above, with the vibrating screen apparatus 2, the water spraying pipes 7 are removed from the liquid discharge unit 5 formed by combining the pipes, and thus the screen 4 can be removed from the sieve main body 3. There is employed a configuration in which only a part of the liquid discharge unit 5 is separated and removed as described above, and hence the weight of the member to be moved for removal of the screen 4 is reduced, resulting in that no framework 107 or no crane described above is required.

[0043] For comparison with the building 1 provided with the vibrating screen apparatus 2 of FIG. 1, a longitudinal sectional side view of a building 1 which is provided with the vibrating screen apparatus 101 in place of the vibrating screen apparatus 2 and has the framework 107 formed therein is shown in FIG. 10. When the framework 107 is provided as illustrated, a space for installing the framework 107 and a space for raising the water spraying portion 105 of the liquid discharge unit 104 are required above the vibrating screen apparatus 101. Even in a case in which a crane is used without providing the framework 107 as described above, similarly, a relatively large space is required above the vibrating screen apparatus 101.

[0044] In a facility treating a granular material, it is normal to transport a processing object (such as the granular material itself or processing liquid that becomes a manufacture source of the granular material) from the upper side to the lower side in accordance with gravity, and sequentially process the processing object in each piece of equipment. Accordingly, when a relatively large space is provided above the vibrating screen apparatus 101 as described above, each piece of equipment arranged on the upstream side in a movement path of the processing object with respect to the vibrating screen apparatus 101 is installed at a position that is higher by the amount corresponding to the space as compared to the case in which the vibrating screen apparatus 2 is provided. In FIG. 1 and FIG. 10, the filter press 16, the hopper 13, and the conveyor 14 are illustrated as pieces of equipment to be arranged on the upstream side of the vibrating screen apparatus 2 and 101. As illustrated, as compared to the case in which the vibrating screen apparatus 2 is provided, in the case in which the vibrating screen apparatus 101 is provided, those pieces of equipment are installed at higher positions with respect to the floor surface 10, and the height of the room 11, and in turn, the height of the building 1 is larger in accordance therewith.

[0045] When such a building 1 having a relatively large height is constructed, the sizes of building materials such as pillars and beams are increased, and the number of required building materials is increased, leading to a reduction in efficiency and economy of construction. Further, a large crane is required for the construction work, and the number of work steps is increased, leading to an increase in construction period and construction cost. However, with the vibrating screen apparatus 2, the space required on the upper side is reduced, and thus the height of the building 1 can be reduced. Accordingly, the reduction in efficiency and economy of construction of the building 1 can be prevented, and the increase in construction cost and construction period can also be prevented. In addition, with the vibrating screen apparatus 2, no construction cost of the framework 107 is required, and no time or effort for operating the crane and no work of mounting and removing a moving target to the crane are required. Thus, the cost required for replacing the screen 4 and the time and effort of the work can be both reduced.

[0046] Incidentally, it is also conceivable to provide a flange to each of the end portion of the composite pipe 6 and the end portion of the water spraying pipe 7 and connect and fix the flanges to each other by a plurality of pairs of bolts and nuts. That is, when the water spraying pipe 7 is removed from the composite pipe 6, the nuts and the bolts are removed from the flanges. However, in such a configuration in which the water spraying pipe 7 is mounted and removed through use of the nuts and bolts, a large number of nuts and bolts are required to be mounted and removed. In addition, when the water spraying pipe 7 is removed from the composite pipe 6, the bolts and the nuts removed from the flanges are required to be kept. Accordingly, at the time of performing the work of mounting and removing the screen 4, there is a fear in that the burden of the operator cannot be sufficiently reduced and extension of a work process cannot be sufficiently solved.

[0047] However, the liquid discharge unit 5 has a configuration in which the water spraying pipe 7 is mounted and removed by shifting the position of the sleeve 67, which forms the accompanying portion 60 provided on the composite pipe 6, to perform switching between the formation of the engagement between the engaging portion of the composite pipe 6 and the engaged portion of the water spraying pipe 7 and the release of the engagement. Accordingly, the mounting and the removing can be easily performed. The accompanying portion 60 is maintained in a state of being connected to the composite pipe 6, and the formation and the release of the engagement are switched by the movement of the position of the sleeve 67. Accordingly, no time or effort for keeping the components removed from the pipes such as the bolts and the nuts described above is required. Thus, with the liquid discharge unit 5, the time and effort of the operator required for performing the replacement work of the screen 4 can be reduced, and the construction period can be shortened.

[0048] Incidentally, it is assumed that the end portion of the connection pipe 63 extends in the horizontal direction without being bent downward, and is a straight pipe that is not bent with respect to the water spraying pipe 7. In this case, when one end side of the water spraying pipe 7 is mounted to and removed from one connection pipe 63 out of one connection pipe 63 and another connection pipe 63 forming the same pair, another end portion of the water spraying pipe 7 interferes with the another connection pipe 63. Accordingly, time and effort are required because the connection pipe 63 is also required to be removed from the liquid discharge unit 5. However, the end portion of the composite pipe 6 is formed as the connection pipe 63 extending vertically downward, and the water spraying pipe 7 includes the first part 72 extending in the transverse direction and the second parts 73 which are each bent with respect to the first part 72 to extend vertically downward. The operator vertically moves the water spraying pipe 7 to mount and remove both ends of the water spraying pipe 7 to and from the connection pipes 63. Accordingly, at the time of mounting and removing the one connection pipe 63 to and from the water spraying pipe 7, the water spraying pipe 7 does not interfere with the another connection pipe 63, and hence the connection pipe 63 is not required to be removed from the liquid discharge unit 5. That is, directing the end portion of each connection pipe 63 downward and directing both the end portions of the water spraying pipe 7 upward by bending both the end portions contribute to a further reduction in time and effort of the operator.

[0049] Further, when the water spraying pipe 7 is bent as described above, the first part 72 provided with the discharge ports 70 is positioned in the inner region 35 of the sieve main body 3. Accordingly, the distance between the sieve surface and the discharge ports 70 is relatively close, and hence a high water pressure can be applied when water is sprayed to the granular material 20 being a sieving object. Thus, this configuration is preferred because the washing performance of the granular material 20 can be relatively increased. Further, the lower end portion of the connection pipe 63 is positioned in the inner region 35, and thus the water spraying pipe 7 is positioned in the inner region 35. Accordingly, the arrangement of the lower end portion of the connection pipe 63 contributes to the relative increase in washing performance.

[0050] The configuration of the water spraying portion 71 is not limited to the example described above. For example, the water spraying portion 71 may be provided as follows. The direction of the water spraying portion 71 may be changed by 90 degrees in plan view from the example described above so that the water spraying pipe 7 extends in the front-rear direction and the distribution pipe 61 extends in the right-left direction. Incidentally, in the liquid discharge unit, the position at which the separation is performed is not limited to that in the example described above, and, further, the water spraying pipes 7 are not limited to be individually separable as in the example described so far. FIG. 11 and FIG. 12 show a vibrating screen apparatus 2 including a liquid discharge unit 5A which is a first modification example of the liquid discharge unit, in place of the liquid discharge unit 5. FIG. 11 is a plan view of the vibrating screen apparatus 2, and FIG. 12 is a longitudinal sectional front view of the vibrating screen apparatus 2 as viewed in the inclination direction.

[0051] Now, differences of the liquid discharge unit 5A from the liquid discharge unit 5 are mainly described. In the liquid discharge unit 5A, instead of performing mounting and removing through formation of engagement between the water spraying pipe 7 and the composite pipe 6 and release of the engagement, mounting and removing are performed through formation of engagement between the collection pipe 62 of the composite pipe 6 and each of the supply pipe 50 and the pipe 59 and release of the engagement. That is, in the liquid discharge unit 5A, the water spraying portion 71 is collectively mounted and removed. The first unit forming portion is the water spraying portion 71, and the second unit forming portion is the supply pipe 50 and the pipe 59. In order to perform mounting and removing between the composite pipe 6 and each of the supply pipe 50 and the pipe 59 as described above, an end portion of each of the supply pipe 50 and the pipe 59, which is to be connected to the composite pipe 6, is bent and directed downward, and is provided with the accompanying portion 60.

[0052] In addition, an upstream end portion of the collection pipe 62 in each composite pipe 6 is bent and directed upward. The upstream end portion of one collection pipe 62 is inserted into the supply pipe 50, and the upstream end portion of another collection pipe 62 is inserted into the pipe 59. Although not shown, in order to form the engagement, the upstream end portion of the collection pipe 62 has the annular groove 74 formed therein as in the same manner as the water spraying pipe 7 of the liquid discharge unit 5. The engagement is formed between the supply pipe 50 and the collection pipe 62 as described above, and hence the flange 50A and the flange 62A provided on the downstream end of the supply pipe 50 and the upstream end of the collection pipe 62, respectively, in the liquid discharge unit 5 are not provided in the liquid discharge unit 5A.

[0053] As described above, the liquid discharge unit 5A has a configuration in which the water spraying pipes 7 are collectively mounted and removed, and hence the time and effort of the operator are more reliably reduced. However, the weight of the water spraying portion 71 is increased, and hence there is a fear in that it becomes difficult for the operator to support the water spraying portion 71. Thus, it is preferred that the water spraying pipes 7 be configured to be individually mountable and removable as in the liquid discharge unit 5. In the liquid discharge unit 5A, the water spraying pipe 7 is not mounted and removed through formation and release of engagement between the composite pipe 6 and the water spraying pipe 7, and hence no connection pipe 63 is provided in the composite pipe 6, and no second part 73 is provided in the water spraying pipe 7 because the water spraying pipe 7 is not bent. That is, in the distribution pipe 61 forming the composite pipe 6, the water spraying pipes 7 which are straight pipes extend from positions separated from each other in the extension direction of the distribution pipe 61. In this example, a boundary portion between the composite pipe 6 and the water spraying pipe 7 corresponds to the connection portion connecting those pipes to each other.

[0054] Subsequently, differences of a liquid discharge unit 5B which is a second modification example of the liquid discharge unit from the liquid discharge unit 5 are mainly described. FIG. 13 is a longitudinal sectional front view of a vibrating screen apparatus 2 including the liquid discharge unit 5B in place of the liquid discharge unit 5, and FIG. 14 is a perspective view of an accompanying portion 81 provided in the liquid discharge unit 5B. In the liquid discharge unit 5B, the connection pipe 63 in the composite pipe 6 and the water spraying pipe 7 each extend horizontally without being bent. In addition, in the liquid discharge unit 5B, similarly to the liquid discharge unit 5, formation and release of engagement between the connection pipe 63 and the water spraying pipe 7 are switched, but the water spraying pipe 7 is not inserted into the connection pipe 63. The switching is performed under a state in which the water spraying pipe 7 is interposed between the right and left connection pipes 63. In detail, a flange 63A is fonned on the downstream end of the connection pipe 63, and a flange 7Ais formed on each of both ends of the water spraying pipe 7. Under a state in which those flanges 63A and 7A are opposed and in contact with each other, the formation and the release of the engagement described above are switched.

[0055] On an outer peripheral surface of the end portion of the connection pipe 63, a plurality of accompanying portions 81 are provided along a pipe circumference. Each of the accompanying portions 81 includes a shaft 82, a support portion 83, and a lever 84. The shaft 82 extends orthogonal to a pipe axis of the end portion of the connection pipe 63, and the support portion 83 supports the shaft 82 on the outer peripheral surface of the connection pipe 63 so that the lever 84 is turnable about the shaft 82 serving as a turning axis. The operator can change a direction of the lever 84 forming the engagement forning portion between a release position (second position) extending from the shaft 82 toward a proximal end side of the connection pipe 63 and an engagement position (first position) extending from the shaft 82 toward a distal end of the connection pipe 63. A recessed portion 85 is formed as the engaging portion in a side surface of the lever 84.

[0056] On an outer peripheral surface of the end portion of the water spraying pipe 7, a plurality of gripping portions 86 are provided along the pipe circumference. Each of the gripping portions 86 includes two protruding portions 87 protruding from the outer peripheral surface. The two protruding portions 87 are opposed to each other so as to be separated from each other in a direction orthogonal to the pipe axis by substantially the same length as the width of the lever 84, and a claw 88 forming the engaged portion is provided at a distal end of each of the two protruding portions 87 so as to extend toward the opposed protruding portion 87. The protruding portions 87 have slight flexibility, and hence an interval between those claws 88 can be expanded. FIG. 13 shows only one accompanying portion 81 and one gripping portion 86.

[0057] The operator turns the lever 84 of each accompanying portion 81 from the release position to the engagement position under a state in which the flange 7A provided at the end of the water spraying pipe 7 and the flange 63A provided at the downstream end of the connection pipe 63 are brought into contact with each other and are opposed to each other. In this manner, the lever 84 is caused to be sandwiched between the protruding portions 87 of the gripping portion 86. When each of the claws 88 enters the recessed portion 85 of the lever 84, the engagement between the claw 88 and the recessed portion 85 is formed, the water spraying pipe 7 is fixed to the connection pipe 63. With a reverse operation, the engagement is released, and the water spraying pipe 7 can be removed from the connection pipe 63. The lever 84 of the accompanying portion 81 is also prevented from dropping from the connection pipe 63 due to the movement for formation and release of the engagement, similarly to the sleeve 67 of the accompanying portion 60.

[0058] Even when the liquid discharge unit 5B is provided as described above, the above-mentioned effects can be obtained similarly to the cases in which the liquid discharge units 5 and SA are provided. However, in order to increase the cleaning power with respect to the granular material 20, in some cases, the water pressure in the water spraying portion 71 is increased. In those cases, from the viewpoint of finnly connecting the water spraying pipe 7 and the connection pipe 63 to each other and reliably preventing water leakage from a gap between those pipes, it is preferred to employ a configuration in which, as in the liquid discharge units 5 and 5A, the engagement is formed by inserting one pipe into another pipe.

[0059] Subsequently, differences of a liquid discharge unit 5C which is a third modification example of the liquid discharge unit from the liquid discharge unit 5 are mainly described. FIG. 15 is a longitudinal sectional front view of a vibrating screen apparatus 2 including the liquid discharge unit 5C in place of the liquid discharge unit 5, as viewed in the inclination direction. The liquid discharge unit 5C includes a shower head 91 including a large number of discharge ports 70 on the lower side, and the shower head 91 is provided above the screen 4. A short pipe 92 protruding outward of the shower head 91 is provided to the shower head 91, and the accompanying portion 60 is provided on the short pipe 92. The downstream end portion of the supply pipe 50 is inserted into the short pipe 92, and the downstream end portion is provided with the annular groove 74 similarly to the water spraying pipe 7 of the liquid discharge unit 5. In this example, the shower head 91 and the short pipe correspond to the first unit forming portion, and the supply pipe 50 corresponds to the second unit forming portion.

[0060] With the above-mentioned configuration, under a state in which the supply pipe 50 has been inserted into the short pipe 92, formation and release of engagement between the supply pipe 50 and the short pipe 92 can be switched, and hence the shower head 91 is mountable to and removable from the supply pipe 50. When the above-mentioned engagement is formed, and the shower head 91 is mounted to the supply pipe 50, the shower head 91 is supported by the supply pipe 50, and the position of the shower head 91 above the floor surface 10 is fixed. In addition, when the shower head 91 is mounted to the supply pipe 50 as described above, and water is supplied from the supply pipe 50 to the short pipe 92, the water is discharged from the discharge ports 70 onto the screen 4 via a flow path 93 expanding in the transverse direction in the shower head 91.

[0061] As described above, the liquid discharge unit is not limited to a configuration formed of only pipes. However, in the structure of the shower head 91, there is a fear in that sufficient water does not reach a position in the flow path 93 relatively distant from a part at which the short pipe 92 is opened, and the amount of water discharged from the discharge ports 70 fluctuates to cause a reduction in amount of water supplied to a partial region of the screen 4. For example, a large number of relatively small-sized shower heads 91 are provided in place of providing a relatively large-sized shower head 91. That is, there may be employed a configuration in which the flow path 93 is divided above the screen 4 so that a water passing range is restricted and unrequired expansion is prevented, thereby allowing fluctuations in discharge water amount among the discharge ports 70 to be suppressed. However, the number of components forming the liquid discharge unit is increased. The liquid discharge units 5, 5A, and 5B described above employ a configuration in which water is distributed and supplied from the distribution pipe 61 to the water spraying pipes 7. Thus, while the number of components as the liquid discharge unit is reduced so that the configuration of the liquid discharge unit is simplified, the water passing range above the screen 4 is restricted, and hence water can be sufficiently supplied to each portion in the front-rear direction and the right-left direction of the screen 4.

[0062] In each of the liquid discharge units 5, 5A, and 5C including the accompanying portion 60 and the annular groove 74, the pipes provided with the accompanying portion 60 and the annular groove 74 may be reversed from those in the example described above, and, in accordance therewith, the pipe into which the pipe is inserted and the pipe to be inserted may be reversed from those in the example described above. Accordingly, for example, in the liquid discharge unit 5, the annular groove 74 may be provided on the composite pipe 6, the accompanying portion 60 may be provided on the water spraying pipe 7, and the composite pipe 6 may be inserted into the water spraying pipe 7. In the liquid discharge unit 5B, the accompanying portion 81 may be provided on the water spraying pipe 7, and the gripping portion 86 may be provided on the connection pipe 63. As described above, each of the engagement forming portion, the engaging portion, and the engaged portion may be provided on any one of the pipe on the upstream side or the pipe on the downstream side.

[0063] Incidentally, the vibrating screen apparatus is not limited to the inclined vibrating screen apparatus described so far. The present technology may be applied to a vibrating screen apparatus having a configuration in which the sieve surface of the screen is horizontally provided and the sieve frame is provided across the entire periphery of the screen. However, when a relatively large-sized vibrating screen apparatus is formed, in order to prevent the unsieved sorting target from remaining on the screen after the sieving, it is preferred that the vibrating screen apparatus be the inclined vibrating screen apparatus as described above. In addition, in the large-sized vibrating screen apparatus, the liquid discharge unit to be provided also tends to have a large size. Accordingly, the present technology is particularly preferably applied to the inclined vibrating screen apparatus.

[0064] Description has been given of an example in which, as the liquid discharge unit, members having a liquid flow path formed therein are separable from each other, but the present invention is not limited to such a configuration. For example, there may be employed a configuration in which, in the liquid discharge unit 5 described with reference to FIG. 2 to FIG. 4, instead of allowing the water spraying pipe 7 to be separated from another part, the support column 53 and the composite pipe 6 supported on the support column 53 are allowed to be separated from each other so that the water spraying portion 71 can be collectively moved from above the screen 4. However, when there is employed a configuration in which the water spraying portion 71 is collectively moved as described above, there is a fear in that it is difficult for the operator to support the water spraying portion 71 because of its weight. In terms of reducing the size and weight of the member to be removed to reduce the burden of the operator, it is preferred to employ a configuration in which, as in the liquid discharge unit 5, out of the members forming the flow path around the sieve main body 3, a part (water spraying pipe 7) positioned above the screen 4 can be limitedly removed, that is, a configuration in which members forming the flow path are separable from each other.

[0065] The screen is not limited to that including the sieve mesh 41 as exemplified as the screen 4, and the screen is only required to be capable of performing sieving. Specifically, the screen may be, for example, a so-called punching plate in which a large number of circular through holes are formed in a dispersed manner in a plate. Further, the screen may be a so-called finger-type screen having a structure in which bar-shaped members extend in the front-rear direction at intervals from a member extending in the right-left direction, and the sieving is performed by causing the sorting target to pass through a gap between the bar-shaped members.

[0066] The vibrating screen apparatus 2 is not limited to be installed in a chemical plant. The vibrating screen apparatus 2 may be installed in any plant such as a mining plant, or may be installed in facilities other than a plant. In addition, the vibrating screen apparatus 2 is not limited to be installed in the building 1, and may be installed outdoor. Even when the vibrating screen apparatus 2 is installed outdoor, time and effort for forming the framework 107 and performing a crane operation by the operator can be prevented. When the vibrating screen apparatus 2 is installed outdoor, for example, the support portions 37 are provided on the ground. That is, the ground becomes the installation surface of the vibrating screen apparatus 2.

[0067] The sorting target to be supplied to the vibrating screen apparatus 2 is not limited to the granular material 20. Any sorting target may be supplied in accordance with the application of the vibrating screen apparatus 2, and ore, waste, and the like may be the sorting target. Further, the liquid to be supplied onto the screen is not limited to water, and any liquid can be supplied in accordance with the sorting target. Further, the liquid to be discharged has been described as being sprayed on the sorting target, that is, described as being a mist, but the liquid may be discharged so as to form a liquid flow without becoming such a mist.

[0068] The embodiments disclosed herein are exemplification in all aspects, and are not to be considered as restrictive. Various modes of omission, substitution, modification, and combination may be adopted in the embodiments described above, without departing from the scope and gist of accompanying Claims. Reference Signs List [Image disponible dans le document PDF, Image available in the PDF document]

Claims

1. A vibrating screen apparatus, comprising: a screen, provided above an installation surface so as to be supported with respect to the installation surface; a vibrating mechanism, configured to vibrate the screen with respect to the installation surface in order to sieve a supply object supplied onto the screen; and a liquid discharge unit, configured to discharge a liquid supplied from a liquid feeding mechanism to the supply object on the screen, wherein the liquid discharge unit includes: a first unit forming portion, provided with discharge ports having positions fixed with respect to the installation surface at a time of discharging the liquid; and a second unit forming portion, separable from the first unit forming portion.

2. The vibrating screen apparatus according to claim 1, wherein the liquid discharge unit includes: a plurality of liquid spraying pipes, each extending in a transverse direction and each including a first part in which the discharge ports are formed; a distribution pipe, extending in the transverse direction so as to cross an extension direction of the first part, the distribution pipe including a connection portion to which one end of a corresponding one of the plurality of liquid spraying pipes is to be connected along the extension direction in order to distribute the liquid to each of the plurality of liquid spraying pipes; and a supply pipe, configured to supply the liquid to the distribution pipe, wherein the second unit forming portion is formed of the supply pipe, and the first unit forming portion is formed only of the plurality of liquid spraying pipes out of the plurality of liquid spraying pipes and the distribution pipe, or formed of the plurality of liquid spraying pipes and the distribution pipe.

3. The vibrating screen apparatus according to claim 2, wherein the second unit forming portion is formed of the supply pipe and the distribution pipe, and the first unit forming portion is formed of the plurality of liquid spraying pipes, and is individually separable from the distribution pipe.

4. The vibrating screen apparatus according to any one of claims 1 to 3, wherein the second unit forning portion includes a pipe forming a flow path on an upstream side of a pipe forming the first unit forming portion, one pipe out of the pipe forming the first unit forming portion and a pipe forming the second unit forming portion is provided with an engaging portion and an engagement forming portion, and another pipe out of the pipe forming the first unit forming portion and the pipe forming the second unit forming portion is provided with an engaged portion, under a state in which the one pipe and the another pipe are in contact with each other, the engagement forming portion is moved between a first position and a second position while keeping a state of being connected to the one pipe, and thus formation of engagement between the engaging portion and the engaged portion and release of the engagement for performing the separation are switched.

5. The vibrating screen apparatus according to claim 4, wherein the liquid discharge unit includes: a plurality of liquid spraying pipes forming the first unit forming portion, the plurality of liquid spraying pipes each including a first part which extends in a transverse direction and in which the discharge ports are formed; and a distribution pipe extending in the transverse direction so as to cross an extension direction of the first part, the distribution pipe forming the second unit forming portion and including a connection portion to which one end of a corresponding one of the plurality of liquid spraying pipes is to be connected along the extension direction in order to distribute the liquid to each of the plurality of liquid spraying pipes, wherein each of the plurality of liquid spraying pipes includes a second part which is bent with respect to the first part so as to extend in a longitudinal direction, the connection portion is a pipe, and includes a third part which extends in the longitudinal direction and is positioned above the second part, and the engaging portion and the engagement forming portion are provided in one of the second part or the third part, and the engaged portion is provided in another one of the second part or the third part.

6. The vibrating screen apparatus according to claim 5, wherein the screen includes a sieve surface which is inclined with respect to a horizontal plane, and wherein the vibrating screen apparatus further comprises a sieve frame which is opened in an inclination direction so that the supply object sliding downward on the sieve surface is allowed to move outside of a top of the screen, the sieve frame being provided with the screen in a mountable and removable manner and being configured to be vibrated together with the screen by the vibrating mechanism.

7. The vibrating screen apparatus according to claim 6, wherein the first part of each of the plurality of liquid spraying pipes is positioned in an inner region surrounded by the sieve frame.

8. The vibrating screen apparatus according to claim 7, wherein the third part has a lower end portion positioned in the inner region.

9. A liquid discharge unit, which is configured to feed a liquid to a vibrating screen apparatus including: a screen provided above an installation surface so as to be supported with respect to the installation surface; and a vibrating mechanism configured to vibrate the screen with respect to the installation surface in order to sieve a supply object supplied onto the screen, the liquid discharge unit being configured to discharge the liquid supplied from a liquid feeding mechanism to the supply object on the screen, wherein the liquid discharge unit includes: a first unit forming portion, provided with discharge ports having positions fixed with respect to the installation surface at a time of discharging the liquid; and a second unit forming portion, separable from the first unit forming portion.