Large workpiece processing device

Abstract

The invention provides a large workpiece processing device, and belongs to the technical field of machinery. A large workpiece processing device comprises a fixing frame used for being connected to the ground, and the fixing frame comprises a bottom frame and a top frame; the telescopic rods can stretch out and draw back in the height direction, the lower ends of the telescopic rods are fixedly connected with the bottom frame, the telescopic rods are distributed on the bottom frame in a circumferential array mode, circulation channels are formed in the telescopic rods, and a plurality of nozzles are formed in the surfaces of the telescopic rods; the telescopic rod comprises a plurality of spray pipes in sliding connection, the nozzles are formed in the spray pipes, and the top ends of the spray pipes at the same height are fixedly connected through a fixing ring; the upper end of the shielding film is fixedly connected with the uppermost end of the telescopic rod, and the lower end of the shielding film is fixedly connected with the bottom frame; the suspension frame is fixed to the top frame, a lifting device is arranged on the suspension frame, and the lifting device is used for lifting a workpiece to be cleaned; the lifting device is used for being connected with the fixing ring located at the highest position and used for driving the telescopic rod to ascend, descend and stretch out and draw back.

Description

Technical Field

[0001] The invention belongs to the field of mechanical technology, in particular to a large workpiece processing device. Background Art

[0002] Large workpieces are more difficult to clean. Due to their large size, they cannot be suspended for cleaning using a track-type suspension mechanism. If a horizontal setting is used for cleaning, not only will a large cleaning device be required, but a large amount of water resources will be consumed during the cleaning process, and the handling of the workpiece will also be extremely inconvenient. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems in the prior art and to provide a large workpiece processing device which has the characteristic of being easy to clean.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] A large workpiece processing device, comprising:

[0006] A fixing frame for connecting to the ground, the fixing frame comprising a bottom frame and a top frame;

[0007] A plurality of telescopic rods capable of extending and retracting in the height direction, wherein the lower ends of the telescopic rods are fixedly connected to the base frame, the telescopic rods are circumferentially arrayed on the base frame, a flow channel is provided inside the telescopic rods, and a plurality of nozzles are provided on the surface of the telescopic rods; the telescopic rods include a plurality of nozzles connected in a sliding manner, wherein the nozzles are provided on the nozzles, and the top ends of the plurality of nozzles at the same height are fixedly connected by a fixing ring;

[0008] A shielding film, wherein the upper end of the shielding film is fixedly connected to the uppermost end of the telescopic rod, and the lower end of the shielding film is fixedly connected to the base frame;

[0009] A hanging frame, the hanging frame is fixed on the top frame, and a lifting device is provided on the hanging frame, and the lifting device is used to lift the workpiece to be cleaned;

[0010] A lifting device is used to connect the fixing ring at the highest position and to drive the telescopic rod to lift and retract.

[0011] In the above-mentioned large workpiece processing device, each of the nozzles is provided with two opposite first guide grooves, a second guide groove, a first slider located at the top of the nozzle and a second slider located at the bottom of the nozzle, the first slider is arranged in the first guide groove, and the second slider is arranged in the second guide groove, when two adjacent nozzles slide in cooperation, the first slider and the first guide groove on one nozzle are respectively slidably cooperated with the second guide groove and the second slider on the other nozzle; the first slider can be abutted against the second slider up and down; the first slider is provided with a first channel, and the second slider is provided with a second channel, the first channel and the second channel respectively have a first through portion and a second through portion parallel to the flow channel in the nozzle, the first through portion and the second through portion are arranged along the direction of gravity, and when the first slider and the second slider are abutted against each other up and down, the first through portion and the second through portion can be connected.

[0012] In the above-mentioned large workpiece processing device, a self-locking mechanism is arranged on the nozzle, and the self-locking mechanism includes two self-locking components symmetrically arranged on the second slider, and the self-locking component includes a swing rod and a support part, and the support part is fixed on the second slider, and the middle part of the swing rod is hinged on the support part, and one end of the swing rod is connected with a spring sheet, and a sliding column is fixed on the spring sheet, and a buckle claw is arranged on the other end of the swing rod; a side hole connected with the first through part is provided on the first slider, and the side hole is perpendicular to the first through part, and the sliding column is slidably arranged in the side hole; a limiting groove is provided on the second slider; after the first slider is able to abut against the second slider up and down and water is passed, the sliding column is moved toward the outside by the water pressure and drives the swing rod to swing, so that the buckle claw on the swing rod is fastened to the limiting groove to prevent the first slider and the second slider from separating.

[0013] In the above-mentioned large workpiece processing device, a compression spring is fixed on the first sliding block, and the compression spring can be pressed against the swing rod to make the pawl on the swing rod disengage from the limiting groove.

[0014] In the above-mentioned large workpiece processing device, an annular groove is arranged around the first through portion on the lower surface of the first slider, and a sealing ring is installed in the annular groove. When the first slider and the second slider are abutted up and down, the sealing ring abuts on the second slider.

[0015] In the above-mentioned large workpiece processing device, the lifting device includes two winches and two guide wheels. The two guide wheels are rotatably arranged on the top frame of the fixed frame. The two winches are respectively fixed on both sides of the fixed frame. The ropes of the two winches are respectively wound around the two guide wheels, and the ends of the ropes are fixedly connected to the fixed rings.

[0016] In the above-mentioned large workpiece processing device, the nozzle is arranged at the inner bottom of the first guide groove, and a nozzle head is installed in the nozzle.

[0017] In the above-mentioned large workpiece processing device, a fixing ring is fixed to the lower end of a plurality of nozzles at the same height.

[0018] Compared with the prior art, this application has the following advantages:

[0019] In the present application, first, the fixed frame is stably connected to the ground through the bottom frame, and the top frame provides a supporting structure for the suspension frame. When a large workpiece needs to be processed, the lifting device on the suspension frame is used to lift the workpiece to be cleaned and suspend it in a suitable position. Then, the lifting device drives the fixed ring in the highest position to move. Since the top ends of multiple nozzles at the same height are fixedly connected by the fixed ring, the lifting and lowering of the fixed ring will cause the telescopic rod to achieve a telescopic action. Cleaning media such as cleaning liquid or water are transported through the circulation channel inside the telescopic rod, and then sprayed out from the nozzle on the nozzle to perform multi-directional cleaning of the suspended large workpiece. The shielding film plays a barrier role in the whole process to prevent the cleaning liquid from splashing everywhere, making the cleaning process relatively closed and concentrated. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a structural diagram in this application;

[0021] Figure 2 yes Figure 1 A partial enlarged view of;

[0022] Figure 3 yes Figure 2 Cross-section view at the middle AA position;

[0023] Figure 4 is a top view of the telescopic rod position in this application;

[0024] In the figure,

[0025] 2. Fixed frame; 21. Bottom frame; 22. Top frame;

[0026] 3. telescopic rod; 31. circulation channel; 32. nozzle; 321. nozzle; 33. nozzle; 331. first guide groove; 332. second guide groove; 333. first slider; 3331. first channel; 33311. first through portion; 3332. side hole; 334. second slider; 3341. second channel; 33411. second through portion; 3342. limiting groove; 34. fixing ring; 35. fixing ring;

[0027] 4. Blocking film;

[0028] 5. Suspension rack;

[0029] 6. Lifting device; 61. Winch; 62. Guide wheel.

[0030] 7. Lifting device;

[0031] 8. Self-locking mechanism; 81. Swinging rod; 82. Supporting part; 83. Spring; 84. Sliding column; 85. Claw; 86. Compression spring;

[0032] 9. Sealing ring. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] like Figures 1 to 4 As shown, a large workpiece processing device comprises: a fixed frame 2 for connecting to the ground, a plurality of telescopic rods 3 that can be extended and retracted along the height direction, a shielding film 4, a hanging frame 5, and a lifting device 6, wherein the fixed frame 2 comprises a bottom frame 21 and a top frame 22; the lower end of the telescopic rod 3 is fixedly connected to the bottom frame 21, and the telescopic rods 3 are distributed on the bottom frame 21 in a circumferential array, a flow channel 31 is arranged inside the telescopic rod 3, and a plurality of nozzles 32 are opened on the surface of the telescopic rod 3; the telescopic rod 3 comprises a plurality of slidably connected nozzles 33, and the nozzles 32 are arranged on the nozzles 33, and the top ends of the plurality of nozzles 33 at the same height are fixedly connected by a fixing ring 34; the upper end of the shielding film 4 is fixedly connected to the uppermost end of the telescopic rod 3, and the lower end of the shielding film 4 is fixedly connected to the bottom frame 21; the hanging frame 5 is fixed on the top frame 22, and a lifting device 7 is arranged on the hanging frame 5, and the lifting device 7 is used to lift the workpiece to be cleaned; the lifting device 6 is used to connect the fixing ring 34 at the highest position, and is used to drive the telescopic rod 3 to rise and fall.

[0035] In the present application, first, the fixed frame 2 is stably connected to the ground through the bottom frame 21, and the top frame 22 provides a supporting structure for the suspension frame 5. When a large workpiece needs to be processed, the lifting device 7 on the suspension frame 5 is used to lift the workpiece to be cleaned and suspend it in a suitable position. Then, the lifting device 6 drives the fixed ring 34 in the highest position to move. Since the top ends of multiple nozzles 33 at the same height are fixedly connected by the fixed ring 34, the lifting and lowering of the fixed ring 34 will cause the telescopic rod 3 to achieve a telescopic action. Cleaning media such as cleaning liquid or water are transported through the circulation channel 31 inside the telescopic rod 3, and then sprayed out from the nozzle 32 on the nozzle 33 to perform multi-directional cleaning on the suspended large workpiece, and the shielding film 4 acts as a barrier in the whole process to prevent the cleaning liquid from splashing everywhere, so that the cleaning process is relatively closed and concentrated.

[0036] In actual application, a trench can be dug on the ground and the large workpiece handling device can be installed therein. The depth of the trench is set to the height of a nozzle 33. In this way, the device is basically flush with the ground when not in use, which is very convenient for hoisting large workpieces. In addition, the workpieces can be set in a vertical manner. During transportation, there is no need to reserve too much transportation space. The large workpiece handling device focuses on the height issue, which greatly reduces its footprint.

[0037] Specifically, each nozzle 33 is provided with two opposite first guide grooves 331, a second guide groove 332, a first slider 333 located at the top of the nozzle 33, and a second slider 334 located at the bottom of the nozzle 33. The first slider 333 is arranged in the first guide groove 331, and the second slider 334 is arranged in the second guide groove 332. When two adjacent nozzles 33 are slidably matched, the first slider 333 and the first guide groove 331 on one nozzle 33 are slidably matched with the second guide groove 332 and the second slider 334 on the other nozzle 33 respectively; the first slider 333 is arranged in the first guide groove 331, and the second slider 334 is arranged in the second guide groove 332. 33 can abut against the second slider 334 up and down; the first slider 333 is provided with a first channel 3331, and the second slider 334 is provided with a second channel 3341, the first channel 3331 and the second channel 3341 respectively have a first through portion 33311 and a second through portion 33411 which are parallel to the flow channel 31 in the nozzle 33, the first through portion 33311 and the second through portion 33411 are arranged along the direction of gravity, and when the first slider 333 and the second slider 334 abut against each other up and down, the first through portion 33311 and the second through portion 33411 can be connected.

[0038] When the device is running, when the length of the telescopic rod 3 needs to be adjusted, adjacent nozzles 33 will slide relative to each other. The first slider 333 at the top of one nozzle 33 slides in the first guide groove 331 of the nozzle 33 where it is located, and cooperates with the second slider 334 and the second guide groove 332 at the bottom of the other nozzle 33 to achieve a stable sliding connection structure. In this process, as the nozzle 33 is extended and retracted, when the first slider 333 and the second slider 334 are abutted against each other up and down, the first through portion 33311 of the first channel 3331 on the first slider 333 and the second through portion 33411 of the second channel 3341 on the second slider 334 are connected along the direction of gravity, thereby ensuring that the cleaning medium can be smoothly transmitted between the circulation channels 31 in each nozzle 33 under the maximum stroke state. Starting from the nozzle 33 at the bottom, the cleaning medium enters each nozzle 33 through the connected through portions in turn, and is finally ejected from the nozzle 32 to clean the large workpiece.

[0039] Through the coordinated design of the first guide groove 331, the second guide groove 332 and the first slider 333, the second slider 334, the adjacent nozzles 33 are tightly connected and slide smoothly during the telescopic process, thereby ensuring the stability and reliability of the entire telescopic rod 3 structure under different working conditions.

[0040] Specifically, the nozzle 33 is provided with a self-locking mechanism 8, which includes two self-locking components symmetrically arranged on the second slider 334, and the self-locking components include a swing rod 81 and a support portion 82, the support portion 82 is fixed on the second slider 334, the middle part of the swing rod 81 is hinged on the support portion 82, one end of the swing rod 81 is connected to a spring sheet 83, a sliding column 84 is fixed on the spring sheet 83, and a buckle claw 85 is arranged on the other end of the swing rod 81; the first slider 333 is provided with a first through portion 33311 The connected side hole 3332 is perpendicular to the first through portion 33311, and the sliding column 84 is slidably set in the side hole 3332; a limiting groove 3342 is provided on the second slider 334; after the first slider 333 can abut against the second slider 334 up and down and water is passed through, the sliding column 84 moves toward the outside under the water pressure and drives the swing rod 81 to swing, so that the buckle 85 on the swing rod 81 is buckled on the limiting groove 3342 to prevent the first slider 333 and the second slider 334 from separating.

[0041] When the large workpiece processing device starts working and cleaning media such as cleaning water is introduced into the circulation channel 31 in the nozzle 33, the water flow will enter the second through portion 33411 on the second slider 334. Since the first slider 333 is provided with a side hole 3332 which is perpendicular to and connected to the first through portion 33311, after water flows into the first through portion 33311, the sliding column 84 slidingly arranged in the side hole 3332 will be affected by the water pressure.

[0042] As water pressure is applied, the sliding column 84 will move outward along the side hole 3332, and the sliding column 84 is fixed on the spring piece 83, and the spring piece 83 is connected to the swing rod 81. The outward movement of the sliding column 84 will drive the swing rod 81 to swing around the hinge point between it and the support part 82. A claw 85 is provided at one end of the swing rod 81. During the swinging process, when the first slider 333 and the second slider 334 are abutted against each other up and down, the claw 85 on the swing rod 81 will gradually approach the limiting groove 3342 opened on the first slider 333, and finally be fastened to the limiting groove 3342.

[0043] By fastening the claw 85 with the limit groove 3342, the first slider 333 and the second slider 334 are restricted in the vertical direction, effectively preventing the separation of the two due to external forces and other factors, thereby ensuring that the adjacent nozzles 33 always maintain a stable connection during the extension and water cleaning process, ensuring the stability and reliability of the structure of the entire telescopic rod 3, allowing the cleaning work to proceed smoothly, and the cleaning medium can be continuously sprayed out from the nozzle 32 through each nozzle 33 to clean large workpieces.

[0044] The existence of the self-locking mechanism 8 enables the first slider 333 and the second slider 334 to be firmly combined together during the operation of the adjacent nozzles 33, especially under complex working conditions such as the introduction of cleaning medium, facing water pressure and possible external interference, thereby greatly enhancing the stability of the connection between the nozzles 33, avoiding problems such as damage to the structure of the telescopic rod 3 or interruption of cleaning due to accidental loosening or separation, and ensuring the continuity of the cleaning operation and the reliable operation of the device. The entire self-locking mechanism 8 is mainly composed of relatively simple components such as a swing rod 81, a support part 82, a spring piece 83, and a sliding column 84. Through clever articulation and coordination with various components, the pressure of the water flow itself is used as a triggering force to achieve the self-locking function, without the need for additional complex driving devices or control systems.

[0045] Specifically, a compression spring 86 is fixed on the first sliding block 333 , and the compression spring 86 can lean against the swing rod 81 to make the catch 85 on the swing rod 81 disengage from the limiting groove 3342 .

[0046] When it is necessary to release the locking state of the first slider 333 and the second slider 334, it can be achieved by acting on the compression spring 86. The compression spring 86 is fixed on the first slider 333. In its initial state, it applies a certain force to the swing rod 81. When unlocking is required, the internal water pressure disappears. Then, under the action of the compression spring 86, the clasp 85 can be disengaged from the limit groove 3342.

[0047] Specifically, an annular groove is provided around the first through portion 33311 on the lower surface of the first slider 333 , and a sealing ring 9 is installed in the annular groove. When the first slider 333 and the second slider 334 abut against each other up and down, the sealing ring 9 abuts against the second slider 334 .

[0048] The sealing ring 9 is installed in the annular groove around the first through portion 33311 on the lower surface of the first slider 333. When the first slider 333 and the second slider 334 are abutted against each other, the sealing ring 9 is tightly abutted against the second slider 334. This design effectively prevents the cleaning medium from leaking at the connection between the first slider 333 and the second slider 334.

[0049] Specifically, the lifting device 6 includes two winches 61 and two guide wheels 62. The two guide wheels 62 are rotatably set on the top frame 22 of the fixed frame 2. The two winches 61 are respectively fixed on both sides of the fixed frame 2. The ropes of the two winches 61 are respectively wound around the two guide wheels 62, and the ends of the ropes are fixedly connected to the fixed ring 34.

[0050] When the height of the telescopic rod 3 needs to be adjusted, the winches 61 on both sides are started. The winches 61 rotate to retract and release the rope. The rope first changes direction around the guide wheel 62 set on the top frame 22, and then connects to the fixing ring 34. When the winch 61 retracts the rope, the rope generates an upward pulling force on the fixing ring 34. Since the fixing ring 34 connects the top ends of the nozzles 33 at the same height, this pulling force will drive the entire telescopic rod 3 to lift upward, thereby realizing the ascending action; and when the winch 61 releases the rope, under the action of the telescopic rod 3's own gravity, the telescopic rod 3 will move downward along the rope, thereby completing the descending action.

[0051] Specifically, the nozzle 32 is disposed at the inner bottom of the first guide groove 331 , and a nozzle head 321 is installed in the nozzle 32 .

[0052] Specifically, a fixing ring 35 is fixed to the lower end of a plurality of nozzles 33 at the same height.

[0053] A fixing ring 35 is fixed at the lower end of the nozzles 33 at the same height, so that the nozzles 33 form a relatively stable overall structure in the horizontal direction.

[0054] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative position relationship and movement status of the components in a certain specific posture, as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0055] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. At the same time, the meaning of "and / or" appearing in the full text is that it includes three schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0056] The above components are all common standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0057] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A large workpiece processing device, characterized in that: include: A fixing frame (2) for connecting to the ground, the fixing frame (2) comprising a bottom frame (21) and a top frame (22); A plurality of telescopic rods (3) capable of being extended and retracted in a height direction, the lower ends of the telescopic rods (3) being fixedly connected to the base frame (21), the telescopic rods (3) being distributed in a circumferential array on the base frame (21), the interior of the telescopic rods (3) being provided with a flow channel (31), and the surface of the telescopic rods (3) being provided with a plurality of nozzles (32); the telescopic rods (3) comprising a plurality of slidably connected nozzles (33), the nozzles (32) being arranged on the nozzles (33), and the top ends of the plurality of nozzles (33) at the same height being fixedly connected via a fixing ring (34); A shielding film (4), wherein the upper end of the shielding film (4) is fixedly connected to the uppermost end of the telescopic rod (3), and the lower end of the shielding film (4) is fixedly connected to the base frame (21); A hanging frame (5), the hanging frame (5) being fixed on the top frame (22), the hanging frame (5) being provided with a lifting device (7), the lifting device (7) being used to lift a workpiece to be cleaned; A lifting device (6) is used to connect the fixing ring (34) at the highest position and to drive the telescopic rod (3) to lift, retract and extend.

2. The large workpiece processing device according to claim 1, characterized in that: Each of the nozzles (33) is provided with two opposite first guide grooves (331), a second guide groove (332), a first slider (333) located at the top of the nozzle (33), and a second slider (334) located at the bottom of the nozzle (33); the first slider (333) is arranged in the first guide groove (331), and the second slider (334) is arranged in the second guide groove (332); when two adjacent nozzles (33) are slidably matched, the first slider (333) and the first guide groove (331) on one of the nozzles (33) are slidably matched with the second guide groove (332) and the second slider (334) on the other nozzle (33); the first slider (333) can The first slider (333) is provided with a first channel (3331), and the second slider (334) is provided with a second channel (3341). The first channel (3331) and the second channel (3341) respectively have a first through portion (33311) and a second through portion (33411) which are parallel to the flow channel (31) in the nozzle (33). The first through portion (33311) and the second through portion (33411) are arranged along the direction of gravity. When the first slider (333) and the second slider (334) are abutted against each other up and down, the first through portion (33311) and the second through portion (33411) can be connected.

3. The large workpiece processing device according to claim 2, characterized in that: The nozzle (33) is provided with a self-locking mechanism (8), the self-locking mechanism (8) comprising two self-locking components symmetrically arranged on the second slider (334), the self-locking component comprising a swinging rod (81) and a supporting portion (82), the supporting portion (82) being fixed on the second slider (334), the middle portion of the swinging rod (81) being hinged on the supporting portion (82), one end of the swinging rod (81) being connected with a spring sheet (83), a sliding column (84) being fixed on the spring sheet (83), and the other end of the swinging rod (81) being provided with a buckle claw (85); the first slider (333) is provided with a self-locking mechanism (81) which is connected with the first through portion (334); The first through portion (33311) is provided with a side hole (3332) connected to the first through portion (33311), the side hole (3332) is perpendicular to the first through portion (33311), and the sliding column (84) is slidably arranged in the side hole (3332); a limiting groove (3342) is provided on the second sliding block (334); after the first sliding block (333) is able to abut against the second sliding block (334) up and down and water is passed through, the sliding column (84) is moved toward the outside under the water pressure and drives the swing rod (81) to swing, so that the buckle claw (85) on the swing rod (81) is buckled on the limiting groove (3342) to prevent the first sliding block (333) and the second sliding block (334) from separating.

4. The large workpiece processing device according to claim 3, characterized in that: A compression spring (86) is fixed on the first sliding block (333), and the compression spring (86) can abut against the swing rod (81) to enable the catch (85) on the swing rod (81) to disengage from the limiting groove (3342).

5. The large workpiece processing device according to claim 4, characterized in that: An annular groove is arranged around the first through portion (33311) on the lower surface of the first slider (333), and a sealing ring (9) is installed in the annular groove. When the first slider (333) and the second slider (334) are pressed against each other up and down, the sealing ring (9) presses against the second slider (334).

6. The large workpiece processing device according to claim 1, characterized in that: The lifting device (6) comprises two winches (61) and two guide wheels (62). The two guide wheels (62) are rotatably arranged on the top frame (22) of the fixed frame (2). The two winches (61) are respectively fixed on both sides of the fixed frame (2). The ropes of the two winches (61) are respectively wound around the two guide wheels (62), and the ends of the ropes are fixedly connected to the fixed ring (34).

7. The large workpiece processing device according to claim 1, characterized in that: The nozzle (32) is arranged at the inner bottom of the first guide groove (331), and a nozzle (321) is installed in the nozzle (32).

8. The large workpiece processing device according to claim 1, characterized in that: A fixing ring (35) is fixed to the lower ends of a plurality of nozzles (33) at the same height.

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