A noise reduction house on a corrugated paper production line

Abstract

The application discloses a noise reduction room on a corrugated paper production line and belongs to the technical field of corrugated paper production, which comprises a room body frame, a door body is rotationally connected to one side of the front face of the room body frame through a cross frame, a plug groove is formed in the door body and the upper surface of the room body frame, mounting frames are mounted on the front face, both sides and the back face of the room body frame, sound absorption boards are assembled in the mounting frames and the plug groove, the sound absorption board comprises a punched plate, a diffusion cone barrel is fixed in the hole of the punched plate, and sound absorption cotton is fixed on one side of the punched plate.

Description

Technical Field

[0001] The invention relates to the technical field of corrugated paper production, in particular to a noise reduction room on a corrugated paper production line. Background Art

[0002] Corrugated cardboard, also known as corrugated cardboard, is a multi-layer adhesive body. It consists of a wavy core paper sandwich and cardboard. It is mainly used to make cartons, carton sandwiches and other packaging materials for fragile goods. Corrugated cardboard has good mechanical strength, can withstand a certain amount of pressure on the plane, is elastic, and has a good cushioning effect.

[0003] During the operation of the corrugated cardboard production line, a professional noise reduction room is required due to the high noise of the equipment. However, in actual production scenarios, material handling operations inevitably contact the room structure, which can easily cause damage to the surface of the sound-absorbing panels. In severe cases, the sound-absorbing materials may break and fail, directly affecting the acoustic performance of the noise reduction system. When the damaged sound-absorbing panels need to be replaced, the disassembly-installation operation window must be experienced. During this period, the noise reduction room will completely lose its sound insulation function. If a shutdown maintenance plan is adopted, although the maintenance safety can be ensured, the continuous production process will be interrupted; if the equipment is kept running, there will be safety hazards, forming a binary contradiction between noise reduction effect and production efficiency. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem that when replacing damaged sound-absorbing panels, the noise reduction room must go through the disassembly and installation operation window period, during which the noise reduction room will completely lose its sound insulation function. The present invention proposes a noise reduction room for a corrugated paper production line.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A noise reduction room for a corrugated paper production line comprises a room frame, a door body rotatably connected to one side of the front of the room frame via a cross frame, slots are provided in the interior of the door body and on the upper surface of the room frame, mounting frames are installed on the front, sides and back of the room frame, and sound-absorbing panels are installed in the mounting frames and in the slots;

[0007] The sound-absorbing panel comprises a perforated plate, a emitting cone barrel is fixed in the holes of the perforated plate, a sound-absorbing cotton is fixed on one side of the perforated plate, one end of the emitting cone barrel is inserted into the sound-absorbing cotton, and a flat plate frame with two ends connected to the perforated plate is fixed on one side of the sound-absorbing cotton. Noise enters the emitting cone barrel through the holes on the surface of the perforated plate and is dispersed into the sound-absorbing cotton in a cone shape.

[0008] A temporary storage component is installed on the inner wall of the installation frame by providing a limiting sliding groove, so that when a damaged sound-absorbing panel is replaced, the damaged sound-absorbing panel can be temporarily retained on the inner side of the installation frame through the temporary storage component.

[0009] As a further description of the above technical solution:

[0010] The temporary storage assembly includes a lower support seat and an upper limiting seat, and the lower surface of the lower support seat and the upper surface of the upper limiting seat are both fixed with sliders adapted to the limiting slide grooves. The lower support seat is slidably connected to the inner bottom wall of the mounting frame through the slider, and the upper limiting seat is slidably connected to the inner top wall of the mounting frame through the slider.

[0011] As a further description of the above technical solution:

[0012] One end of the lower support seat and the upper limiting seat is rotatably connected to a connecting column by opening a T-shaped column groove. A damping pad is provided on the inner wall of the T-shaped column groove so that the position of the connecting column can be limited after rotation. A T-shaped baffle is fixed to one end of the connecting column.

[0013] As a further description of the above technical solution:

[0014] The top wall and bottom wall of the mounting frame are both provided with mounting holes, and a spherical column is connected to the mounting hole via a spring. The upper surface and lower surface of the flat frame are both provided with limiting holes adapted to the spherical column, so that the position of the sound-absorbing panel can be fixed after being engaged in the mounting frame.

[0015] As a further description of the above technical solution:

[0016] An L-shaped engaging groove is provided at the end of the door body so that the ends of the two sound-absorbing panels inserted in the door body that are in contact with each other are staggered with the door gap.

[0017] As a further description of the above technical solution:

[0018] A first card slot is provided at the top and bottom of the front face of the door body, and a second card slot corresponding to the first card slot is provided on the outer wall of the flat frame located inside the door body. A card strip is inserted into both the first and second card slots, and the card strip is fixed to the door body by a positioning stud.

[0019] As a further description of the above technical solution:

[0020] The emitting cone barrel includes a front cone tube fixed in a hole on the surface of a punching plate, one end of the front cone tube is fixedly connected to a rear cone tube, and the rear cone tube is inserted into the sound-absorbing cotton.

[0021] As a further description of the above technical solution:

[0022] An outer spiral guide groove is provided on the outer wall of the front cone, and an inner spiral guide groove is provided on the inner wall of the rear cone. A plurality of through holes for noise to pass through are provided on the inner walls of the outer spiral guide groove and the inner spiral guide groove.

[0023] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0024] The provision of temporary storage components and sound-absorbing panels allows for quick replacement of sound-absorbing panels without downtime. The temporary storage components allow for the "new to replace the old" approach, preventing noise reduction from failing during the removal-installation window. This resolves the conflict between maintenance downtime and production continuity, maintains the sound insulation integrity of the noise reduction room throughout the process, and allows for temporary fixation of damaged sound-absorbing panels after replacement.

[0025] The emitting cone barrel extends the noise path through the outer spiral guide groove and the inner spiral guide groove, and uses the through-hole staggered design to cause noise collision to offset the volume, enhance the sound energy loss, and make the noise more dispersed into the sound-absorbing cotton for further silencing. Finally, the residual noise is intercepted by the flat frame to form multi-level noise reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of a structural installation according to an embodiment of the present invention is shown;

[0027] Figure 2 A schematic diagram of the planar structure of a sound-absorbing panel provided according to an embodiment of the present invention is shown;

[0028] Figure 3 It shows a schematic diagram of the internal structure of the lower support seat after being cut open according to an embodiment of the present invention;

[0029] Figure 4 A schematic diagram showing the position of a damaged sound-absorbing panel on the side of a room frame after replacement according to an embodiment of the present invention is shown;

[0030] Figure 5 The embodiment of the present invention provides Figure 4 Enlarged view of point A in the middle;

[0031] Figure 6 A schematic structural diagram of a door body provided according to an embodiment of the present invention is shown;

[0032] Figure 7 A schematic diagram of the structure of a dispensing cone barrel after being cut open is shown according to an embodiment of the present invention;

[0033] Figure 8 Shows a schematic diagram of replacing the damaged sound-absorbing panels on the top of the door and room frame according to an embodiment of the present invention;

[0034] Figure 9 A schematic structural diagram of a T-shaped baffle after rotation according to an embodiment of the present invention is shown.

[0035] Legend:

[0036] 10. Room frame; 11. Mounting frame; 12. Cross frame; 13. Spring; 14. Spherical column;

[0037] 20. Door body;

[0038] 30. Temporary storage assembly; 31. Lower support seat; 32. Upper limit seat; 33. T-shaped baffle;

[0039] 40. Sound-absorbing panel; 41. Perforated plate; 42. Diffusion cone; 421. Front cone; 422. Rear cone; 423. Outer spiral guide groove; 424. Inner spiral guide groove; 43. Sound-absorbing cotton; 44. Flat panel frame. DETAILED DESCRIPTION

[0040] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0041] like Figure 1 - Figure 9 As shown, the present invention provides:

[0042] A noise reduction room for a corrugated paper production line includes a room frame 10. A door 20 is rotatably connected to one side of the front of the room frame 10 via a cross frame 12. Slots are provided inside the door 20 and on the upper surface of the room frame 10. Mounting frames 11 are installed on the front, sides, and back of the room frame 10. Sound-absorbing panels 40 are installed in the mounting frames 11 and in the slots.

[0043] The sound-absorbing panel 40 includes a perforated plate 41. A radiating cone 42 is fixed in the holes of the perforated plate 41. A sound-absorbing cotton 43 is fixed to one side of the perforated plate 41. One end of the radiating cone 42 is inserted into the sound-absorbing cotton 43. A flat plate frame 44 is fixed to one side of the sound-absorbing cotton 43, with both ends connected to the perforated plate 41. Noise enters the radiating cone 42 through the holes on the surface of the perforated plate 41 and is dispersed in a cone shape into the sound-absorbing cotton 43.

[0044] In further detail, Figure 2 and Figure 7As shown, the emission cone barrel 42 includes a front cone 421 fixed in the hole on the surface of the punching plate 41, one end of the front cone 421 is fixedly connected to the rear cone 422, and the rear cone 422 is inserted into the sound-absorbing cotton 43. An outer spiral guide groove 423 is opened on the outer wall of the front cone 421, and an inner spiral guide groove 424 is opened on the inner wall of the rear cone 422. A plurality of through holes for noise to pass through are opened on the inner walls of the outer spiral guide groove 423 and the inner spiral guide groove 424, which increases the contact area between the noise and the sound-absorbing material and causes multiple collisions and reflections of the noise during the propagation process, further consuming the energy of the noise.

[0045] Specifically, under the action of the outer spiral guide groove 423 and the inner spiral guide groove 424, the noise entering the holes on the surface of the punching plate 41 can be guided to increase its travel path in the holes. At the same time, when entering the rear cone 422 through the through hole on the inner wall of the outer spiral guide groove 423, due to the different positions of the through holes, a collision will occur after entering the rear cone 422, offsetting part of the volume, and then dissipated to different positions in the sound-absorbing cotton 43 through the through holes on the inner wall of the inner spiral guide groove 424, contacting the sound-absorbing cotton 43 as much as possible. Due to the entry of noise, the porous fiber structure of the sound-absorbing cotton 43 vibrates and rubs against each other to offset the noise, which has a further noise reduction effect. Finally, the remaining noise is intercepted by the flat frame 44 to achieve a further noise reduction effect.

[0046] In further detail, Figure 1 、 Figure 3 、 Figure 4 、 Figure 8 and Figure 9 As shown, a temporary storage component 30 is installed on the inner wall of the mounting frame 11 by providing a limiting sliding groove, so that when a damaged sound-absorbing panel 40 is replaced, the damaged sound-absorbing panel 40 can be temporarily retained inside the mounting frame 11 through the temporary storage component 30;

[0047] The temporary storage assembly 30 includes a lower support seat 31 and an upper limiting seat 32. Sliders that are adapted to the limiting slide grooves are fixed to the lower surface of the lower support seat 31 and the upper surface of the upper limiting seat 32. The lower support seat 31 is slidably connected to the inner bottom wall of the mounting frame 11 via the slide, and the upper limiting seat 32 is slidably connected to the inner top wall of the mounting frame 11 via the slide. One end of the lower support seat 31 and the upper limiting seat 32 is rotatably connected to a connecting column through a T-shaped column groove. A damping pad is provided on the inner wall of the T-shaped column groove so that the position of the connecting column can be limited after rotation. A T-shaped baffle 33 is fixed to one end of the connecting column.

[0048] Specifically, when the side or front and back sound-absorbing panels 40 are damaged and need to be replaced, new sound-absorbing panels 40 are placed against the outer wall of the damaged sound-absorbing panels 40. It should be noted that the perforated plate 41 of the new sound-absorbing panel 40 is facing inward. Then the new sound-absorbing panel 40 is pushed inward. At this time, the damaged sound-absorbing panel 40 also moves inward under the push. When the new sound-absorbing panel 40 is engaged in the installation frame 11, the damaged sound-absorbing panel 40 is pushed to the inside of the room frame 10 and separated from the installation frame 11. As the damaged sound-absorbing panel 40 gradually moves inward, it drives the lower support seat 31 and the upper limiting seat 32 to move inward together. At the same time, after stopping moving, the T-shaped baffles 33 at the upper and lower positions limit the position of the damaged sound-absorbing panel 40 to prevent it from tipping over.

[0049] The replacement process does not require machine downtime and can ensure that the noise reduction function is always effective during the replacement process, so that noise will not leak, thereby ensuring that the noise will not affect the workers who are doing the replacement. Therefore, the replacement operation does not need to be performed during the machine's non-operating period. The sound-absorbing panel 40 can be replaced immediately after it is damaged, ensuring that the noise generated by the machine on the corrugated paper production line during the operating period can be effectively reduced.

[0050] The damaged sound absorbing panels 40 generated during the working period are temporarily stored in the room frame 10 after replacement and can be removed during downtime. To remove the damaged sound absorbing panels 40, the upper and lower T-shaped baffles 33 are respectively rotated 180 degrees so that the T-shaped baffles 33 no longer restrict the sound absorbing panels 40, allowing the damaged sound absorbing panels 40 to be easily removed.

[0051] It is worth noting that after removal, the T-shaped baffle 33 needs to be reset and pushed toward the side of the new sound-absorbing panel 40 so that it fits against the inner side of the sound-absorbing panel 40 and is then reset to its initial state so as to support and restrict the panel when the damaged sound-absorbing panel 40 is replaced next time. It is worth noting that when the lower support seat 31 and the upper limiting seat 32 move inward under the push of the damaged sound-absorbing panel 40 until they are completely replaced, no gap will be generated at the seat body connecting the outside world with the room frame 10.

[0052] Furthermore, Figure 5 As shown, mounting holes are provided on the top and bottom walls of the mounting frame 11, and spherical columns 14 are connected to the mounting holes via springs 13. Positioning holes that match the spherical columns 14 are provided on the upper and lower surfaces of the flat panel frame 44, so that the sound absorbing panel 40 can be fixed in position after being snapped into the mounting frame 11.

[0053] Specifically, in the process of replacing the damaged sound-absorbing plate 40 with the new sound-absorbing plate 40, the spherical column 14 at the spherical end thereof is gradually pushed downward and separated from the limiting hole during the process of the new sound-absorbing plate 40 pushing the damaged sound-absorbing plate 40 to move inward, and the spherical column 14 is clamped in the limiting hole on the new sound-absorbing plate 40 under the action of the spring 13 after the new sound-absorbing plate 40 moves to the original position of the damaged sound-absorbing plate 40, thereby fixing the position of the new sound-absorbing plate 40.

[0054] In particular, as shown in Figure 1 and Figure 6 , the door body 20 is provided with an L-shaped engagement groove at the end thereof, so that the end of the two sound-absorbing plates 40 inserted into the door body 20 is staggered with the door gap. The top and bottom of the front surface of the door body 20 are provided with first clamping grooves, and the outer wall of the flat frame 44 located in the door body 20 is provided with second clamping grooves corresponding to the first clamping grooves. The first clamping grooves and the second clamping grooves jointly insert a clamping strip, and the clamping strip is fixed to the door body 20 through positioning studs;

[0055] Specifically, in order to ensure the airtightness between the door body 20 and the house frame 10 after the door body 20 is closed, the door body 20 is arranged in a manner protruding from the outer wall of the house frame 10. The edge of the door body 20 protrudes beyond the opening edge of the house frame 10 corresponding to the door body 20, thereby reducing the noise escaping from the gap. Meanwhile, the sound-absorbing plates 40 in the door body 20 are installed in a side insertion manner and are secondarily fixed by the clamping strip after installation.

[0056] When one of the sound-absorbing plates 40 on the door body 20 is damaged, the clamping strip is first released, and then the end of the new sound-absorbing plate 40 is attached to the end of the undamaged sound-absorbing plate 40. Then, the undamaged sound-absorbing plate 40 is moved to the side of the damaged sound-absorbing plate 40 by pushing the new sound-absorbing plate 40, so that the damaged sound-absorbing plate 40 is gradually pushed out of the door body 20. After being pushed out, the undamaged sound-absorbing plate 40 moves to the position of the damaged sound-absorbing plate 40, and the new sound-absorbing plate 40 is in the initial position of the undamaged sound-absorbing plate 40.

[0057] Similarly, the above-mentioned movement process does not require stopping. Preferably, the sound-absorbing panel 40 inserted on the top of the room frame 10 is made of multiple pieces, and the gap does not leak out. It is located in the middle of the beam. Similarly, the replacement method is to insert a new sound-absorbing panel 40 from the end and then push out the damaged sound-absorbing panel 40. When the damaged sound-absorbing panel 40 is in the middle position, it is necessary to continuously remove multiple new sound-absorbing panels 40 (the number is the number of panels that can keep the top of the room frame 10 closed after the damaged sound-absorbing panel 40 is pushed out). In this process, some undamaged sound-absorbing panels 40 will be pushed out. These sound-absorbing panels 40 need to be preserved for subsequent use. Finally, it is worth noting that the sound-absorbing panels 40 in the door body 20 and the sound-absorbing panels 40 on the top of the room frame 10 can be directly removed when replaced and will not be temporarily retained.

[0058] Specifically, when the noise reduction room on this corrugated paper production line is working / in use:

[0059] 1. Replace the side or front and back sound absorbing panels 40

[0060] Step 1: Place a new sound-absorbing panel 40 (with the perforated panel 41 facing inward) against the outer wall of the damaged sound-absorbing panel 40 and push the new sound-absorbing panel 40 inward to move the damaged sound-absorbing panel 40 toward the inside of the room frame 10;

[0061] Step 2: When the damaged sound absorbing panel 40 moves, it drives the lower support seat 31 and the upper limiting seat 32 to move synchronously inward along the limiting slide groove of the mounting frame 11. The T-shaped baffle 33 is fixed in position by the damping pad to temporarily support the damaged sound absorbing panel 40.

[0062] Step 3: After the new sound-absorbing panel 40 is completely inserted into the mounting frame 11, the spherical column 14 is inserted into the limiting hole of the new sound-absorbing panel 40 under the action of the spring 13 to complete the fixation;

[0063] Cleaning after shutdown: rotate the T-shaped baffle 33 180 degrees to release the restriction on the damaged sound-absorbing panel 40, remove the damaged panel and reset the temporary storage assembly 30.

[0064] 2. Replace the top sound absorbing panel 40

[0065] Step 1: Insert the new sound-absorbing panel 40 from one end of the top of the room frame 10 and push the old panel inward.

[0066] Step 2: Continuously insert multiple new sound-absorbing panels 40 (the number should ensure that the top of the room frame 10 is closed), and completely push out the damaged panel.

[0067] Step 3: Save the pushed-out undamaged sound absorbing panel 40 for subsequent use.

[0068] 3. Replace the sound absorbing panel 40 inside the door body 20

[0069] Step 1: Release the fixing strip (positioning studs), insert the new sound absorbing panel 40, push the undamaged sound absorbing panel 40 toward the damaged panel, and directly push the damaged panel out. The undamaged sound absorbing panel 40 fills the position of the damaged panel, and the new sound absorbing panel 40 fills the gap.

[0070] Step 2: Reinsert the retaining bar and tighten the positioning studs to secure it.

[0071] 4. General operating precautions

[0072] Non-stop maintenance: No need to stop the machine during the replacement process, and the noise is always effectively isolated to protect the health of workers.

[0073] Structural restoration: After cleaning the damaged sound-absorbing panel 40 , the T-shaped baffle 33 needs to be restored and pushed to fit the inside of the new sound-absorbing panel 40 to ensure that the temporary storage assembly 30 is in its initial state.

[0074] Sealing of the door body 20: The door body 20 is designed to protrude from the outer wall of the room frame 10, and the L-shaped bite groove is used to ensure that the door gap is sealed to reduce the risk of noise leakage.

[0075] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A noise reduction room on a corrugated paper production line, comprising a room frame (10), characterized in that: A door body (20) is rotatably connected to one side of the front of the room frame (10) via a cross frame (12), a slot is provided inside the door body (20) and on the upper surface of the room frame (10), and mounting frames (11) are installed on the front, both sides and back of the room frame (10), and sound absorbing panels (40) are installed in the mounting frames (11) and the slots; The sound-absorbing plate (40) comprises a punching plate (41), a emitting cone barrel (42) is fixed in the holes of the punching plate (41), a sound-absorbing cotton (43) is fixed on one side of the punching plate (41), one end of the emitting cone barrel (42) is plugged into the sound-absorbing cotton (43), and a flat plate frame (44) with two ends connected to the punching plate (41) is fixed on one side of the sound-absorbing cotton (43), and noise enters the emitting cone barrel (42) through the holes on the surface of the punching plate (41) and is diffused into the sound-absorbing cotton (43) in a cone shape; A temporary storage component (30) is installed on the inner wall of the installation frame (11) by providing a limiting sliding groove, so that when the damaged sound-absorbing panel (40) is replaced, the damaged sound-absorbing panel (40) can be temporarily retained on the inner side of the installation frame (11) through the temporary storage component (30); The temporary storage assembly (30) includes a lower support seat (31) and an upper limiting seat (32), wherein a slider adapted to the limiting slide groove is fixed to the lower surface of the lower support seat (31) and the upper surface of the upper limiting seat (32), and the lower support seat (31) is slidably connected to the inner bottom wall of the mounting frame (11) via the slider, and the upper limiting seat (32) is slidably connected to the inner top wall of the mounting frame (11) via the slider; One end of the lower support seat (31) and the upper limiting seat (32) is rotatably connected to a connecting column by opening a T-shaped column groove, and a damping pad is provided on the inner wall of the T-shaped column groove so that the position of the connecting column can be limited after rotation, and a T-shaped baffle (33) is fixed to one end of the connecting column; The emitting cone barrel (42) comprises a front cone (421) fixed in a hole on the surface of the punching plate (41); one end of the front cone (421) is fixedly connected to a rear cone (422); and the rear cone (422) is plugged into the sound-absorbing cotton (43); An outer spiral guide groove (423) is provided on the outer wall of the front cone (421), and an inner spiral guide groove (424) is provided on the inner wall of the rear cone (422). A plurality of through holes for noise to pass through are provided on the inner walls of both the outer spiral guide groove (423) and the inner spiral guide groove (424).

2. The noise reduction room on a corrugated paper production line according to claim 1, characterized in that: The top wall and bottom wall of the mounting frame (11) are both provided with mounting holes, and a spherical column (14) is connected to the mounting hole via a spring (13). The upper surface and lower surface of the flat plate frame (44) are both provided with limiting holes that are compatible with the spherical column (14), so that the position of the sound absorbing panel (40) can be fixed after it is engaged in the mounting frame (11).

3. The noise reduction room on the corrugated paper production line according to claim 2, characterized in that: An L-shaped engagement groove is provided at the end of the door body (20), so that the ends of the two sound-absorbing panels (40) inserted into the door body (20) that are in contact with each other are staggered with the door gap.

4. The noise reduction room for a corrugated paper production line according to claim 3, characterized in that: A first card slot is provided at the top and bottom of the front face of the door body (20), and a second card slot corresponding to the first card slot is provided on the outer wall of the flat plate frame (44) located inside the door body (20). A card strip is inserted into both the first card slot and the second card slot, and the card strip is fixed to the door body (20) via a positioning stud.

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