Automatic oil injection device for strip rolling

Abstract

The utility model discloses an automatic oil injection device for strip rolling, which is suitable for strips, the automatic oil injection device for strip rolling comprises a base, a movable part and a mounting beam, the movable part is movably arranged on the base, and the mounting beam is arranged on the movable part and extends along the horizontal direction. The mounting beam is provided with a plurality of nozzles in the extending direction of the mounting beam, the nozzles are used for spraying lubricating oil to the strip, and the movable part can move to a first position where the mounting beam is located above or below the strip and a second position where the mounting beam is located on one side of the strip. According to the automatic oil injection device for strip rolling, when the strip is rolled in the rolling device, the strip can be prevented from colliding with the mounting beam and the nozzle to damage the mounting beam, the nozzle or the strip.

Description

Technical Field

[0001] The utility model relates to the technical field of rolling mill processing, and particularly relates to an automatic oil spraying device for strip rolling. Background Art

[0002] After a rolling mill rolls out strips such as steel strips, the strips need to be wound up. During winding, in order to prevent surface scratches and surface ribbing from occurring due to friction between adjacent two layers of the strip, a lubricating oil is sprayed onto the surface of the strip through an oil spraying device. In the prior art, the oil spraying device generally includes a mounting beam and a plurality of nozzles provided on the mounting beam. The mounting beam is located above or below the strip, and the nozzles spray the lubricating oil onto the surface of the strip, so as to lubricate the surface of the strip.

[0003] However, it is found during use that since the moving path of the strip is very close to the mounting beam, when the strip is initially wound onto the winding device, the strip is very likely to collide with the mounting beam and the nozzles, damaging the mounting beam, the nozzles or the strip. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides an automatic oil spraying device for strip rolling, which can prevent the strip from colliding with the mounting beam and the nozzles and damaging the mounting beam, the nozzles or the strip when the strip is initially wound onto the winding device.

[0005] The automatic oil spraying device for strip rolling according to an embodiment of the utility model is suitable for a strip. The automatic oil spraying device for strip rolling includes a base, a movable part and a mounting beam. The movable part is movably arranged on the base. The mounting beam is arranged on the movable part and extends in the horizontal direction. A plurality of nozzles are arranged on the mounting beam along its extending direction. The nozzles are used for spraying lubricating oil onto the strip. Wherein, the movable part can move to a first position where the mounting beam is located above or below the strip, and a second position where the mounting beam is located on one side of the strip.

[0006] The automatic oil spraying device for strip rolling according to an embodiment of the utility model has at least the following beneficial effects:

[0007] When the strip needs to be wound on the winding device at the beginning, the movable part is adjusted movably to make the mounting beam located on one side of the area where the strip needs to pass. After one end of the strip is wound on the winding device, the movable part is adjusted movably to make the mounting beam located above or below the strip. The nozzle of the mounting beam can spray lubricating oil towards the strip, thereby lubricating the surface of the strip. According to the automatic oil spraying device for strip rolling of the embodiment of the present invention, when the strip needs to be wound on the winding device at the beginning, the movable part is adjusted movably, which can make the mounting beam located on one side of the area where the strip needs to pass, and thus can avoid the strip colliding with the mounting beam and the nozzle and damaging the mounting beam, the nozzle or the strip.

[0008] According to some embodiments of the present invention, the movable part is movably arranged on the base along the width direction of the strip; or, the movable part is located on one side of the strip, and the movable part is rotatably arranged on the base, and the rotation axis of the movable part extends vertically; wherein, the movable part switches between the first position and the second position by moving or rotating.

[0009] According to some embodiments of the present invention, the mounting beam is slidably mounted on the movable part in the vertical direction. The automatic oil spraying device for strip rolling further includes a lead screw and a motor. The lead screw is rotatably arranged on the movable part and extends vertically. The lead screw is provided with an external thread and is threadedly connected to the mounting beam through the external thread. The motor is arranged on the movable part and is connected to the lead screw to drive the lead screw to rotate.

[0010] According to some embodiments of the present invention, there are two mounting beams. The two mounting beams are arranged vertically and are parallel to each other. The movable part can move to make the two mounting beams located above and below the strip respectively. The external thread has two sections with opposite helix directions, and the lead screw is threadedly connected to the two mounting beams through the two sections of the external thread respectively.

[0011] According to some embodiments of the present invention, the automatic oil spraying device for strip rolling further includes two storage boxes. The two storage boxes are arranged on the movable part and correspond to the two mounting beams. The two mounting beams can move in the direction away from each other to be respectively stored in the two storage boxes.

[0012] According to some embodiments of the present utility model, the automatic oil spraying device for strip rolling further includes two connecting parts and two oil leveling rollers. The two connecting parts are respectively rotatably arranged on the two mounting beams. The rotation axis of the connecting part is parallel to the extension direction of the mounting beam. The two oil leveling rollers are respectively arranged on the two connecting parts, and the axial direction of the oil leveling roller is parallel to the extension direction of the mounting beam. Wherein, the two connecting parts can rotate to a first state in which the two oil leveling rollers are respectively in contact with the bottom surface and the top surface of the strip, and a second state in which they are separated from the strip.

[0013] According to some embodiments of the present utility model, the mounting beam is provided with a mounting shaft. The connecting part is rotatably sleeved on the mounting shaft. A torsion spring is sleeved on the mounting shaft. Two ends of the torsion spring are respectively connected to the mounting beam and the connecting part. The torsion spring is used to keep the oil leveling roller in the first state.

[0014] According to some embodiments of the present utility model, when the mounting beam moves into the storage box and the connecting part rotates to make the oil leveling roller in the second state, the oil leveling roller is stored in the storage box.

[0015] According to some embodiments of the present utility model, the mounting beam is provided with a first positioning hole, and the connecting part is provided with a second positioning hole. When the connecting part rotates to make the oil leveling roller in the second state, the first positioning hole is aligned with the second positioning hole to insert a limiting member.

[0016] According to some embodiments of the present utility model, the movable part is provided with a plurality of third positioning holes along the circumferential direction, and the base is correspondingly provided with a plurality of fourth positioning holes. When the movable part rotates to make the two mounting beams respectively located above and below the strip, the third positioning holes are aligned with the fourth positioning holes to install fasteners.

[0017] According to some embodiments of the present utility model, the mounting beam includes a mounting part and a spray pipe. The mounting part is arranged on the movable part, and the spray pipe is arranged on the mounting part and extends along the horizontal direction. A plurality of the nozzles are arranged on the spray pipe along its extension direction.

[0018] Additional aspects and advantages of the present utility model will be given in part in the following description, some advantages will become apparent from the following description, or be learned through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following will further describe the present utility model in conjunction with the drawings and embodiments, where:

[0020] Figure 1 It is a schematic diagram when the movable part is movably arranged on the base;

[0021] Figure 2 Schematic diagram when the movable part rotates and is installed on the base;

[0022] Figure 3 Schematic diagram when there are two mounting beams and the equalizing rollers are in the first state;

[0023] Figure 4 Schematic diagram when there are two mounting beams and the equalizing rollers are in the second state;

[0024] Figure 5 Installation schematic diagram of the equalizing roller;

[0025] Figure 6 For Figure 5 Partial cross-sectional view.

[0026] Reference numerals in the drawings:

[0027] Base 100; Fourth positioning hole 101;

[0028] Movable part 200; Third positioning hole 201;

[0029] Mounting beam 300; Nozzle 301; Mounting shaft 302; Torsion spring 303; First positioning hole 304; Mounting part 305; Spraying pipe 306;

[0030] Lead screw 400; External thread 401;

[0031] Motor 500;

[0032] Storage box 600;

[0033] Connecting part 700; Second positioning hole 701;

[0034] Equalizing roller 800;

[0035] Strip 900. Detailed implementation manners

[0036] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0037] In the description of the present utility model, it should be understood that the orientation or positional relationship involved, such as up, down, etc., indicates the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0038] In the description of the present utility model, "a plurality of" refers to more than two. If the first and the second are described, it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features or implicitly specifying the sequence relationship of the indicated technical features.

[0039] In the description of the present utility model, unless otherwise clearly defined, terms such as "arrangement", "installation", and "connection" shall be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0040] Next, refer to Figures 1 to 6 to describe an automatic oil spraying device for strip rolling according to an embodiment of the present utility model.

[0041] Refer to Figures 1 to 6 As shown, the automatic oil spraying device for strip rolling according to an embodiment of the present utility model is suitable for a strip 900. The automatic oil spraying device for strip rolling includes a base 100, a movable part 200, and a mounting beam 300.

[0042] For example, the movable part 200 is movably arranged on the base 100 and can be fixed after being movably adjusted to a set position;

[0043] The mounting beam 300 is arranged on the movable part 200 and extends in the horizontal direction. The mounting beam 300 is provided with a plurality of nozzles 301 along its extending direction. The nozzles 301 are used to spray lubricating oil towards the strip 900. The nozzles 301 are connected to an external oil supply device. The nozzles 301 can be provided with proportional solenoid valves to accurately control the lubricating oil spraying amount. For example, according to the thickness of the strip 900, the spraying amount of the lubricating oil sprayed by the nozzles 301 can be adjusted to multiple grades, so as to form oil films of different thicknesses, and the practicability is better. The nozzles 301 can adopt wide-angle pressurized fan-shaped nozzles or other suitable nozzles 301.

[0044] Among them, the movable part 200 can move to a first position where the mounting beam 300 is located above or below the strip 900, and a second position where the mounting beam 300 is located on one side of the strip 900.

[0045] In this embodiment, when the strip 900 needs to be wound on the winding device at the beginning, the movable part 200 is movably adjusted so that the mounting beam 300 is located on one side of the area where the strip 900 needs to pass. After one end of the strip 900 is wound on the winding device, the movable part 200 is movably adjusted so that the mounting beam 300 is located above or below the strip 900, and the nozzle 301 of the mounting beam 300 can spray lubricating oil toward the strip 900, thereby lubricating the surface of the strip 900. According to the automatic oil spraying device for strip rolling of the embodiment of the utility model, when the strip 900 is wound on the winding device at the beginning, the movable part 200 is movably adjusted so that the mounting beam 300 is located on one side of the area where the strip 900 needs to pass, thereby preventing the strip 900 from colliding with the mounting beam 300 and the nozzle 301 and damaging the mounting beam 300, the nozzle 301 or the strip 900.

[0046] In some embodiments of the present invention, there are multiple ways to adjust the activity of the movable portion 200, for example, Figure 1 As shown, the movable part 200 is movably and adjustably arranged on the base 100 along the width direction of the strip 900. For example, the base 100 may be provided with a slide rail, and the movable part 200 may be slidably installed on the slide rail, thereby realizing the movement of the movable part 200. During the movement of the movable part 200, the mounting beam 300 can be driven to move to one side of the strip 900 or above or below the strip 900. The structure is simple and the operation is convenient.

[0047] In addition, if Figures 2 to 4 As shown, the movable part 200 can also be located on one side of the strip 900, and the movable part 200 is rotatably arranged on the base 100, and the rotation axis of the movable part 200 extends vertically. Figure 4 As shown, the movable part 200 is provided with a plurality of third positioning holes 201 along the circumferential direction, and the base 100 is provided with a plurality of fourth positioning holes 101 correspondingly. When the movable part 200 is rotated so that the two mounting beams 300 are respectively located above and below the strip 900, the third positioning holes 201 and the fourth positioning holes 101 are aligned to install the fasteners. When the movable part 200 is rotated so that the two mounting beams 300 are located above and below the strip 900, the third positioning holes 201 and the fourth positioning holes 101 are aligned, and then the fasteners are inserted to prevent the movable part 200 from rotating at will. When the movable part 200 needs to be rotated, the fasteners can be removed, which is more convenient to use. By rotating the movable part 200, the mounting beams 300 can be located on the side of the movable part 200 away from the strip 900, or located above and below the strip 900. The structure is simple and the operation is convenient.

[0048] In some embodiments of the present invention, Figures 1 to 4As shown, the mounting beam 300 is vertically movably adjustable and disposed on the movable part 200. In this way, not only can the height of the nozzle 301 be adjusted according to the strip 900 with different thicknesses, so that the nozzle 301 can be applied to strips 900 with different thicknesses, but also by adjusting the height of the nozzle 301, the spraying range of the nozzle 301 can be indirectly adjusted, so that the effect of spraying lubricating oil is better and the effect of forming an oil film is better.

[0049] In some embodiments of the present invention, as Figures 1 to 4 shown, the mounting beam 300 is slidably mounted vertically on the movable part 200. The automatic oil spraying device for strip rolling further includes a lead screw 400 and a motor 500. The lead screw 400 is rotatably disposed on the movable part 200 and extends vertically. The lead screw 400 is provided with an external thread 401 and is threadedly connected to the mounting beam 300 through the external thread 401. The motor 500 is disposed on the movable part 200 and is connected to the lead screw 400 to drive the lead screw 400 to rotate. For example, the movable part 200 may be provided with a guide rail vertically, the mounting beam 300 is slidably mounted on the guide rail, the mounting beam 300 is provided with a threaded hole and is threadedly connected to the external thread 401 of the lead screw 400. Starting the motor 500, the motor 500 controls the rotation of the lead screw 400, and the lead screw 400 can control the movement of the mounting beam 300. The structure is simple, the operation is convenient, and the adjustment of the mounting beam 300 is more precise.

[0050] It should be noted that the mounting beam 300 can also be adjusted by other means. For example, a lifting oil cylinder is provided to control the vertical movement of the mounting beam 300.

[0051] In some embodiments of the present invention, as Figure 3 and Figure 4 shown, there are two mounting beams 300. The two mounting beams 300 are arranged vertically and are parallel to each other. That is, the two mounting beams 300 are located on the same side of the movable part 200 and their projections in the vertical direction coincide. The movable part 200 can move to make the two mounting beams 300 located above and below the strip 900 respectively. The external thread 401 has two sections with opposite helix directions, and the lead screw 400 is threadedly connected to the two mounting beams 300 through the two sections of external threads 401 respectively.

[0052] In this embodiment, by providing two mounting beams 300, the upper and lower sides of the strip 900 can be lubricated by spraying synchronously, with higher lubrication efficiency and better lubrication effect. The lead screw 400 is provided with two sections of external threads 401 with opposite helix directions and is threadedly connected to the two mounting beams 300 through the two sections of external threads 401 respectively. Starting the motor 500, the motor 500 controls the rotation of the lead screw 400, and the lead screw 400 can control the two mounting beams 300 to move synchronously in the direction of approaching or separating from each other. The structure is simple, the operation is convenient, and the adjustment of the mounting beam 300 is more precise.

[0053] In some embodiments of the present utility model, such as Figure 3 and Figure 4 shown, the automatic oil spraying device for strip rolling further includes two storage boxes 600. The two storage boxes 600 are arranged on the movable part 200 and correspond to the two mounting beams 300. The two mounting beams 300 can move in a direction away from each other to be respectively stored in the two storage boxes 600. For example, the two storage boxes 600 are respectively located on the opposite sides of the two mounting beams 300, that is, the storage box 600 located above is higher than the mounting beam 300 located above, and the storage box 600 located below is lower than the mounting beam 300 located below. When the nozzles 301 are not needed, the two mounting beams 300 can be moved in a direction away from each other to be respectively stored in the two storage boxes 600, so that the mounting beams 300 and the nozzles 301 can be located in the storage boxes 600, thereby avoiding damage or dust adhesion due to the continuous exposure of the mounting beams 300 and the nozzles 301.

[0054] In some embodiments of the present utility model, such as Figures 3 to 6 shown, the automatic oil spraying device for strip rolling further includes two connecting parts 700 and two oil leveling rollers 800. The two connecting parts 700 are respectively rotatably arranged on the two mounting beams 300. The rotation axis of the connecting part 700 is parallel to the extending direction of the mounting beam 300. The two oil leveling rollers 800 are respectively arranged on the two connecting parts 700. The axial direction of the oil leveling roller 800 is parallel to the extending direction of the mounting beam 300. Thus, when the two connecting parts 700 rotate in a set direction to make the two oil leveling rollers 800 move in a direction close to each other, the two oil leveling rollers 800 can move to a first state where they respectively fit the bottom surface and the top surface of the strip 900. In this state, the two oil leveling rollers 800 can apply the lubricating oil on the bottom surface and the top surface of the strip 900, making the distribution of the lubricating oil on the bottom surface and the top surface of the strip 900 more comprehensive and uniform, and thus forming a better oil film effect, so that the lubrication effect of the strip 900 is better. When the strip 900 does not need to be lubricated, the two connecting parts 700 can be rotated in the opposite direction of the set direction, so that the two oil leveling rollers 800 move in a direction away from each other to a second state where they are separated from the strip 900.

[0055] In some embodiments of the present utility model, such as Figure 6 shown, the mounting beam 300 is provided with a mounting shaft 302. The connecting part 700 is rotatably sleeved on the mounting shaft 302. The mounting shaft 302 is sleeved with a torsion spring 303. The two ends of the torsion spring 303 are respectively connected to the mounting beam 300 and the connecting part 700. The torsion spring 303 is used to keep the oil leveling roller 800 in the first state.

[0056] In this embodiment, the axial direction of the mounting shaft 302 can be parallel to the extending direction of the mounting beam 300. The connecting portion 700 is rotatably sleeved on the mounting shaft 302, so that the connecting portion 700 can be rotated. A torsion spring 303 is provided. The two ends of the torsion spring 303 are respectively connected to the mounting beam 300 and the connecting portion 700. The elastic restoring force of the torsion spring 303 can make the connecting portion 700 have a tendency to rotate in a set direction, and further make the two oil leveling rollers 800 have a tendency to move in the direction of approaching each other, so that the two oil leveling rollers 800 can be kept in the first state of being attached to the surface of the strip 900. This not only makes the oil leveling effect of the oil leveling rollers 800 better, but also the torsion spring 303 can play a buffering role to avoid excessive impact force between the oil leveling rollers 800 and the strip 900, which may damage the oil leveling rollers 800. In addition, due to the setting of the torsion spring 303, the oil leveling rollers 800 can be applicable to strips 900 of different thicknesses, and the practicability is better.

[0057] In some embodiments of the present utility model, as Figures 3 to 6 shown, when the mounting beam 300 moves to be received in the storage box 600 and the connecting portion 700 rotates to make the oil leveling rollers 800 in the second state, the oil leveling rollers 800 are received in the storage box 600. When the mounting beam 300 moves to be received in the storage box 600, the connecting portion 700 is rotated in the opposite direction of the set direction, so that the two oil leveling rollers 800 move in the direction of moving away from each other to the second state. The oil leveling rollers 800 can also be received in the storage box 600, avoiding damage or dust adhesion when the oil leveling rollers 800 are exposed when not in use.

[0058] In some embodiments of the present utility model, as Figure 5 and Figure 6 shown, the mounting beam 300 is provided with a first positioning hole 304, and the connecting portion 700 is provided with a second positioning hole 701. When the connecting portion 700 rotates to make the oil leveling rollers 800 in the second state, the first positioning hole 304 is aligned with the second positioning hole 701 to insert a limiting member. When the oil leveling rollers 800 are not in use, the connecting portion 700 is rotated to make the oil leveling rollers 800 in the second state. In this state, the first positioning hole 304 is aligned with the second positioning hole 701, and the limiting member is inserted, so that the two oil leveling rollers 800 can be prevented from moving in the direction of approaching each other under the action of the torsion spring 303. Thus, it can not only prevent the oil leveling rollers 800 from contacting the strip 900, but also prevent the oil leveling rollers 800 from moving out of the storage box 600 when the oil leveling rollers 800 are received in the storage box 600.

[0059] In some embodiments of the present utility model, as Figure 5As shown in the figure, the installation beam 300 includes an installation part 305 and a spray pipe 306. The installation part 305 is arranged on the movable part 200. The spray pipe 306 is arranged on the installation part 305 and extends in the horizontal direction. A plurality of nozzles 301 are arranged along the extension direction of the spray pipe 306. The spray pipe 306 is connected with an external oil supply device, and oil is directly supplied to all the nozzles 301 of the installation beam 300 through the spray pipe 306. Compared with the situation where each nozzle 301 is individually connected to an oil pipeline, the structure is simpler and the oil supply is more convenient.

[0060] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the purpose of the present invention.

Claims

1. An automatic oil spraying device for strip rolling, suitable for strips, characterized in that, Comprising: A base; A movable part movably arranged on the base; A mounting beam arranged on the movable part and extending in the horizontal direction, and a plurality of nozzles are arranged on the mounting beam along its extending direction, and the nozzles are used for spraying lubricating oil towards the strip; Wherein, the movable part can move to a first position where the mounting beam is located above or below the strip, and a second position where the mounting beam is located on one side of the strip.

2. The automatic oil spraying device for strip rolling according to claim 1, characterized in that, The movable part can be movably adjusted along the width direction of the strip and arranged on the base; or, The movable part is located on one side of the strip, the movable part is rotatably adjusted and arranged on the base, and the rotation axis of the movable part extends vertically; Wherein, the movable part switches between the first position and the second position by moving or rotating.

3. The automatic oil spraying device for strip rolling according to claim 1 or 2, characterized in that, The mounting beam is slidably mounted on the movable part in the vertical direction, and the automatic oil spraying device for strip rolling further includes: A lead screw rotatably arranged on the movable part and extending in the vertical direction, the lead screw is provided with an external thread and is threadedly connected to the mounting beam through the external thread; A motor arranged on the movable part and connected to the lead screw to drive the lead screw to rotate.

4. The automatic oil spraying device for strip rolling according to claim 3, characterized in that, There are two mounting beams, and the two mounting beams are arranged vertically and parallel to each other. The movable part can move to a position where the two mounting beams are respectively located above and below the strip. The external thread has two sections with opposite helix directions, and the lead screw is threadedly connected to the two mounting beams through the two sections of the external thread respectively.

5. The automatic oil spraying device for strip rolling according to claim 4, characterized in that, The automatic oil spraying device for strip rolling further includes: Two storage boxes arranged on the movable part and corresponding to the two mounting beams, and the two mounting beams can move away from each other to be respectively stored in the two storage boxes.

6. The automatic oil spraying device for strip rolling according to claim 5, characterized in that, The automatic oil spraying device for strip rolling further includes: Two connecting parts respectively rotatably arranged on the two mounting beams, and the rotation axis of the connecting part is parallel to the extending direction of the mounting beam; Two oil leveling rollers respectively arranged on the two connecting parts, and the axial direction of the oil leveling roller is parallel to the extending direction of the mounting beam; Wherein, the two connecting parts can rotate to a first state where the two oil leveling rollers are respectively attached to the bottom surface and the top surface of the strip, and a second state where they are separated from the strip.

7. The automatic oil spraying device for strip rolling according to claim 6, characterized in that, The mounting beam is provided with a mounting shaft, the connecting part is rotatably sleeved on the mounting shaft, and a torsion spring is sleeved on the mounting shaft. The two ends of the torsion spring are respectively connected to the mounting beam and the connecting part, and the torsion spring is used to keep the oil leveling roller in the first state.

8. The automatic oil spraying device for strip rolling according to claim 6, characterized in that, When the mounting beam moves to be stored in the storage box and the connecting part rotates to make the oil leveling roller in the second state, the oil leveling roller is stored in the storage box.

9. The automatic oil spraying device for strip rolling according to claim 6, characterized in that, The mounting beam is provided with a first positioning hole, and the connecting part is provided with a second positioning hole. When the connecting part rotates to make the oil leveling roller in the second state, the first positioning hole is aligned with the second positioning hole to insert a limiting piece.

10. The automatic oil spraying device for strip rolling according to claim 1 or 2, characterized in that, The mounting beam includes: A mounting part arranged on the movable part; A spray pipe arranged on the mounting part and extending in the horizontal direction, and a plurality of the nozzles are arranged on the spray pipe along its extending direction.

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