Sound insulation structure with double roller shutter doors for cold rolling temper mill

Abstract

The embodiment of the invention provides a sound insulation structure used for a cold rolling temper mill and provided with double roller shutter doors. The sound insulation structure comprises a cold rolling temper mill rack and the two roller shutter doors. The cold rolling leveling rack is of a hollow house-shaped structure arranged on the outer side of the cold rolling leveling machine in a sleeving mode, and a door-shaped rack opening is formed in one side face of the cold rolling leveling rack. The roller shutter door comprises a winding drum, a winding shaft located in the winding drum and a roller shutter used for shielding an opening of the rack, the winding drum is connected with the top of the cold rolling leveling rack through a roller shutter door mounting frame, the winding shaft is located on the side of the opening of the rack, and the roller shutter can move up and down along with rotation of the winding shaft; guide rails are connected to the left side and the right side of the opening of the rack. Guide rail grooves for containing the roller shutters are formed in the inner side faces of the guide rails. According to the technical scheme, the structure is simple, noise generated during operation of the cold rolling temper mill can be effectively blocked, the environment of a working area is improved, safe production can be smoothly carried out, and meanwhile the wind-resistant, flame-retardant and waterproof effects are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel production, and in particular to a sound insulation structure of a cold rolling and leveling mill, and more specifically to a sound insulation structure with a double rolling shutter door for a cold rolling and leveling mill. Background Art

[0002] With the development of modern industry, the production efficiency of enterprises is getting higher and higher, and the requirements for improving the noise pollution of cold rolling mill production equipment are becoming more and more stringent. According to statistics, the vast majority of domestic cold rolling mill processes use wet leveling liquid to clean the strip surface and compressed air to blow it clean. The cold rolling leveling machine is divided into upper and lower roll gap blowing, air knife, support roll gap blowing and outlet upper strip blowing. There are many blowing nozzles, which leads to very loud noise. Therefore, the demand to reduce the blowing noise during the operation of the cold rolling leveling machine is becoming more and more urgent.

[0003] In the process of implementing the present invention, the inventors found that there are at least the following problems in the prior art:

[0004] In the prior art, some simple shielding methods are usually used to reduce noise, but the effect of noise reduction is very unsatisfactory. Some domestic steel mills have had many incidents of hearing impairment caused by excessive noise in the production environment. Therefore, how to effectively reduce the purge noise during the operation of the cold rolling mill, improve the working environment, and ensure safe production is a problem that needs to be solved. Summary of the invention

[0005] The embodiment of the present invention provides a sound insulation structure with double rolling doors for a cold rolling and tempering mill, which is used to reduce the blowing noise during the operation of the cold rolling and tempering mill, improve the working environment, and thus ensure safe production.

[0006] To achieve the above-mentioned purpose, an embodiment of the present invention provides a sound insulation structure with double rolling doors for a cold rolling and tempering mill, comprising a cold rolling and tempering mill frame and two sets of rolling doors arranged on the working surface of a factory building; the cold rolling and tempering mill frame is a hollow house-like structure sleeved on the outside of the cold rolling and tempering mill, and the cold rolling and tempering mill frame comprises: a rolled piece inlet end face, a rolled piece outlet end face, two side faces, and a closed top end; the rolled piece inlet end face, the rolled piece outlet end face, and the two side faces are connected to form a circumferentially closed rectangular space of the house-like structure with a top opening, the closed top end closes the top opening, and the cold rolling and tempering mill frame is a hollow house-like structure sleeved on the outside of the cold rolling and tempering mill .... A door-shaped frame opening is provided on one side of the cold rolling and tempering machine frame; the rolling door includes a drum, a reel located inside the drum, and a rolling shutter for covering the frame opening; a rolling door mounting frame is installed on the top of the cold rolling and tempering machine frame, the drum is connected to the cold rolling and tempering machine frame through the rolling door mounting frame, the reel is located above the frame opening, and the rolling shutter is wound on the reel; guide rails are connected to the left and right sides of the frame opening, and guide rail grooves for accommodating the rolling shutter are provided on the inner side surfaces of the guide rails; two sets of rolling doors are arranged up and down, and the reels of the two sets of rolling doors are located on the inner side of the cold rolling and tempering machine frame.

[0007] Furthermore, the line connecting the axes of the rollers of the two sets of rolling doors is in the vertical direction.

[0008] Furthermore, the two sets of rolling doors include an upper rolling door and a lower rolling door, the rolling shaft of the upper rolling door is located above the rolling shaft of the lower rolling door, and the rolling length of the upper rolling door is greater than the length of the rolling length of the lower rolling door; the guide rail includes an inner guide rail matching the lower rolling door, and an outer guide rail matching the upper rolling door.

[0009] Furthermore, the inner guide rail and the outer guide rail are arranged in parallel in a direction perpendicular to the rack opening, and the inner guide rail and the outer guide rail are fixedly connected together.

[0010] Furthermore, the sound insulation structure with double rolling shutter doors for the cold rolling and leveling mill also includes an inner guide section connected to the top of the inner guide rail, and an outer guide section connected to the top of the outer guide rail; the inner side surface of the inner guide section and the inner side surface of the outer guide section are both provided with guide grooves, the guide groove of the inner guide section is connected to the guide groove of the inner guide rail, and the guide groove of the outer guide section is connected to the guide groove of the outer guide rail; the top of the guide groove is inclined toward the inside of the cold rolling and leveling mill frame.

[0011] Furthermore, the guide groove is a structure that is wide at the top and narrow at the bottom, and a rotating wheel is arranged on the side wall of the guide groove close to the center of the cold rolling and leveling machine frame.

[0012] Furthermore, the rolling shutter is formed by connecting multiple curtain pieces, a top hook is provided at the top of the curtain piece, and a bottom hook matching the top hook is provided at the bottom of the curtain piece; the curtain piece is a hollow structure composed of two layers of front and rear metal plates, and a foaming agent is filled in the middle of each curtain piece.

[0013] Furthermore, the sound insulation structure with double rolling shutter doors for the cold rolling mill also includes a bottom sealing assembly; the bottom sealing assembly includes two long sound insulation sealing plates and a connecting plate sandwiched between the two sound insulation sealing plates; the sound insulation sealing plates are placed horizontally at the bottom of the frame opening, and the two ends of the sound insulation sealing plates are respectively engaged and connected with the corresponding guide rails on the left and right sides; the upper part of the connecting plate protrudes from the upper surface of the sound insulation sealing plate, and the top of the connecting plate is an arc-shaped hook, and the rotation direction of the arc-shaped hook is opposite to that of the bottom hook.

[0014] Furthermore, a lateral sealing strip is arranged in the guide rail groove along the vertical direction.

[0015] Furthermore, the sound insulation sealing plate is made of fluororubber, and the lateral sealing strip is made of polyamide.

[0016] The above technical solution has the following beneficial effects:

[0017] The present invention provides a house-type cold rolling and tempering machine frame made of sound insulation material, thereby forming a "sound insulation cover" on the outside of the cold rolling and tempering machine, effectively reducing the noise outside the cold rolling and tempering machine frame. At the same time, for the frame exit where personnel and equipment enter and exit, a "double-layer two-leaf" sound insulation rolling door structure is used for shielding. Double-layer refers to a structure in which the curtain pieces are double-layered and filled with foaming agent. Double-leaf refers to that the curtain pieces of two rolling doors can be used side by side, thereby effectively isolating the noise inside the cold rolling and tempering machine frame, making the external noise reach below 85dB (see the subsequent description for measurement conditions), improving the on-site production environment, and reducing noise pollution.

[0018] In addition, the technical solution of this application also has the following characteristics:

[0019] 1. By adding lateral sealing strips and bottom sealing components, the noise level can be further reduced to ensure the smooth implementation of safe production.

[0020] 2. The double-layer soundproof rolling shutter door structure of this technical solution can also play the role of wind resistance, flame retardancy and waterproof. It has the advantages of good sealing, strong guidance, and can achieve Class B flame retardancy. It is easy to install and disassemble and reliable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 is a schematic cross-sectional view of a sound insulation structure with a double rolling door for a cold rolling skin-pass mill according to an embodiment of the present invention;

[0023] Figure 2 is a schematic structural diagram (side view) of a rolling door in an embodiment of the present invention;

[0024] Figure 3 is a structural schematic diagram of a rolling shutter door in an embodiment of the present invention (front view);

[0025] Figure 4 is a schematic structural diagram of a guide rail assembly in an embodiment of the present invention;

[0026] Figure 5 is a schematic diagram of the connection between the curtain piece and the bottom sealing assembly in an embodiment of the present invention;

[0027] Figure 6 is a schematic diagram of a cold rolling and skin-passing mill stand in an embodiment of the present invention;

[0028] Figure numbers: 1. reel; 2. reel; 3. rolling shutter; 4. outer guide section; 5. inner guide section; 6. rotating wheel; 8. outer guide rail; 9. inner guide rail; 10. bottom sealing assembly; 11. cold rolling and leveling machine frame; 12. rolling shutter door mounting frame; 13. servo motor; 14. controller; 15. lateral sealing strip; 16. curtain piece; 17. sound insulation sealing plate; 18. arc hook; 20. cold rolling and leveling machine; 31. inclined section; 32. straight section. DETAILED DESCRIPTION

[0029] 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.

[0030] like Figure 1 As shown, an embodiment of the present invention provides a sound insulation structure with double rolling shutter doors for a cold rolling and leveling mill, comprising a cold rolling and leveling mill frame 11 and two sets of rolling shutter doors arranged on the working surface of a workshop (i.e., the workshop floor where the cold rolling and leveling mill is located); the cold rolling and leveling mill frame 11 is a hollow house-like structure sleeved on the outside of the cold rolling and leveling mill 20, and the cold rolling and leveling mill frame 11 comprises: a rolled piece inlet end face, a rolled piece outlet end face, two side faces, and a closed top end; the rolled piece inlet end face, the rolled piece outlet end face, and the two side faces are connected to form a circumferentially closed rectangular space with a top opening of the house-like structure, and the closed top end closes the top opening; a door-shaped frame opening is opened on one side of the cold rolling and leveling mill frame 11; the rolling shutter door comprises a reel 1, a position A reel 2 is inside the reel 1, and a rolling curtain 3 is used to cover the frame opening. A rolling door mounting frame 12 is installed on the top of the cold rolling and leveling machine frame 11. The reel 1 is connected to the top of the cold rolling and leveling machine frame 11 through the rolling door mounting frame 12. The reel 2 is located on the upper side of the frame opening. The rolling curtain 3 can move up and down with the rotation of the reel 2. It is wound around the reel 2 when the rolling door is in a reeled state, and leaves the reel 2 and falls when it is in an open state. Guide rails are connected to the left and right sides of the frame opening, and guide rail grooves for accommodating the rolling curtain 3 are provided on the inner side of the guide rails. Two sets of rolling doors are arranged up and down, and the reels 2 of the two sets of rolling doors are located on the inner side of the cold rolling and leveling machine frame 11.

[0031] In order to solve the above problems, in the present application, a "square box" type cold rolling and leveling machine frame 11 is set on the outer side of the cold slag leveling machine (see Figure 6), two feeding ports are provided on the front and rear side surfaces (along the rolling direction) of the cold rolling and leveling mill frame 11 corresponding to the conveyor belt of the cold rolling and leveling mill, so as to realize the feeding and discharging of the cold rolled coils. In addition, a frame opening is provided on the side surface perpendicular to the rolling direction, so as to realize the entry and exit of personnel or equipment materials when changing rolls or maintaining equipment. In order to reduce noise, the side panels of the cold rolling and leveling machine frame 11 can be treated accordingly (for example, double-layer panels are used, and the interior is filled with sound insulation cotton and other materials), and a door that can be opened and closed needs to be added at the frame opening. Due to limited space here, it is difficult to use ordinary swing doors or outward-opening doors. Therefore, it is preferably used to block the door. In addition, the rolling door is easier to realize automatic control. When personnel and materials need to enter and exit, the roller 2 of the rolling door can be rotated forward. At this time, the roller shutter 3 will rise and be rolled up on the roller 2 and can be stored in the drum 1; when the cold rolling and leveling machine operation is required, the roller 2 of the rolling door can be rotated in the opposite direction. At this time, the roller shutter 3 rolled up on the roller 2 will gradually descend, thereby blocking the frame opening to reduce the noise outside the cold rolling and leveling machine frame 11.

[0032] In addition, since the rolling curtain 3 of the rolling door is composed of multiple curtain sheets 16 connected by hooks, there are many gaps, so its ability to block sound is limited. In an actual measurement, when a single-layer rolling curtain 3 is used, the noise outside the frame opening is still as high as 95.7dB (measurement conditions: 1. The cold rolling and tempering mill 20 does not roll steel or wear belts; 2. All vehicles in the front and rear warehouses of the tempering mill are stopped; 3. The axial flow fan next to the cold rolling and tempering mill 20 is turned off, and other axial flow fans in the factory are turned off; 4. The forklifts in the factory are stopped; 5. Operators and fitters stop all operations, Keep quiet; 6. The compressed air purge of the cold rolling and leveling machine 20 is turned on, and the rest of the equipment of the cold rolling and leveling machine 20 stops running. When the above conditions are met, the noise measurement point is located on the operating side of the rolling door outside the cold rolling and leveling machine frame 11, and the straight-line distance between the measurement point and the rolling door is 1.5 meters). For this reason, the present technical solution preferably adopts a double rolling door solution. When the roller shutters 3 of the two rolling doors are lowered, the two rolling shutters 3 are arranged side by side at the frame opening, which can effectively block the noise from propagating to the outside of the cold rolling and leveling machine frame 11 and eliminate the defects of the current layer of rolling shutters 3. To this end, guide rails can be respectively connected to the door frames on the left and right sides of the frame opening. The guide rail grooves of the guide rails can provide limit positions for the rolling shutter 3, which is similar to the roller shutter door guide rails of the prior art. In the present application, the cross-section of the guide rails is a C-shaped structure, and the recessed part in the middle is the guide rail groove, and the guide rail grooves on the left and right sides are arranged opposite to each other.

[0033] Theoretically, the two sets of rolling shutter doors can be set at the same height and symmetrically arranged on the inner and outer sides of the frame opening. However, in practice, due to the limitation of the site space, it is difficult to install the roller 1 of the rolling shutter door on the outside of the cold rolling and tempering machine frame 11, and the outer side wall of the cold rolling and tempering machine frame 11 is a smooth side wall, which makes it difficult to reliably fix the rolling shutter door; and due to the large height dimension in the cold rolling workshop, the top of the cold rolling and tempering machine frame 11 has a large available space. Therefore, in the technical solution, if Figure 2 , Figure 3 As shown, the reels 1 of the two sets of rolling shutter doors can be arranged on the inner side of the cold rolling and leveling machine frame 11 (since the reels 1 are coaxial with the reels 2, the reels 2 of the two sets of rolling shutter doors are also located on the inner side of the cold rolling and leveling machine frame 11 at this time), and installed on the top of the cold rolling and leveling machine frame 11 through the rolling shutter door mounting frame 12, leaving only a gap on the top plate as an up and down passage for the rolling shutter 3.

[0034] Furthermore, the two sets of rolling shutter doors include an upper rolling shutter door and a lower rolling shutter door, the roller shaft 2 of the upper rolling shutter door is located above the roller shaft 2 of the lower rolling shutter door, and the roller shutter length of the upper rolling shutter door is greater than the roller shutter length of the lower rolling shutter door; the guide rail includes an inner guide rail 9 matching the lower rolling shutter door, and an outer guide rail 8 matching the upper rolling shutter door.

[0035] When the reels 1 of the two sets of rolling shutter doors are both arranged on the inner side of the cold rolling and leveling machine frame 11, in order to avoid mutual interference when the rolling shutters 3 are lowered, it is preferred that the two sets of rolling shutter doors are arranged Figure 1 — Figure 3 The state shown is that the rollers 1 of the two rolling shutter doors are arranged one above the other, so that the rolling curtains 3 of the two rolling shutter doors can extend downward at different inclination angles. At this time, the rolling curtain of the lower rolling shutter door can be limited by the inner guide rail 9, and the rolling curtain of the upper rolling shutter door can be limited by the outer guide rail 8. There are four guide rails in total, two inner guide rails 9, which are respectively arranged on the left and right door frames of the frame opening, and two outer guide rails 8, which are also respectively arranged on the left and right door frames of the frame opening. In addition, since the two rolling shutter doors are distributed up and down, the length of the rolling curtain of the upper rolling shutter door should be greater than the length of the rolling curtain of the lower rolling shutter door to compensate for the height difference between the two, so that the rolling curtains 3 of the two rolling shutter doors can all fall to the bottom.

[0036] Furthermore, the line connecting the axes of the rollers 2 of the two sets of rolling shutter doors is in the vertical direction, that is, the axis of the roller 2 of the upper rolling shutter door and the axis of the roller 2 of the lower rolling shutter door are located in the same vertical plane, which is more convenient for on-site installation and layout, and reduces the horizontal space size occupied by the rolling shutter doors.

[0037] Furthermore, the inner guide rail 9 and the outer guide rail 8 are arranged in parallel in a direction perpendicular to the frame opening, and the inner guide rail 9 and the outer guide rail 8 are fixedly connected together to form an integrated structure. At this time, since the outer side surface of the inner guide rail 9 and the inner side surface of the outer guide rail 8 are connected to each other, when the two roller shutters 3 are both put to the bottom, the two sides of the middle gap between the front and rear roller shutters 3 are also closed by the integrated structure, which can better block noise and improve the on-site production environment.

[0038] Furthermore, the sound insulation structure with double rolling shutter doors for the cold rolling mill also includes an inner guide section 5 connected to the top of the inner guide rail 9, and an outer guide section 4 connected to the top of the outer guide rail 8; the inner side surface of the inner guide section 5 and the inner side surface of the outer guide section 4 are both provided with guide grooves, the guide groove of the inner guide section 5 is interconnected with the guide groove of the inner guide rail 9, and the guide groove of the outer guide section 4 is interconnected with the guide groove of the outer guide rail 8; the top of the guide groove is inclined toward the inside of the cold rolling mill frame 11. The roller of a conventional rolling shutter door is installed on the side wall of the wall, and the roller shutter entrance and exit of the roller are installed close to the wall, so its roller shutter rises or falls in the vertical direction, and the layout is relatively simple; in the present application, due to the particularity of the site environment, such as Figure 2 As shown, the reel 1 is arranged inside the cold rolling and leveling machine frame 11, and there is a certain distance between the roller shutter entrance and exit on the reel 1 and the guide rail (installed at the opening of the frame) in the horizontal direction. At this time, the guide section plays an important role: when the roller shutter 3 falls from top to bottom, the inner guide section 5 and the outer guide section 4 arranged obliquely can provide a transition section for the direction change of the roller shutter 3, so that the roller shutter 3 extends out of the reel 1 along the oblique direction, and then enters the corresponding guide groove, and then changes to a vertical state and falls along the guide groove, that is, as shown in FIG. Figure 1 , 2 As shown, after the roller 1 is extended, the roller blind 3 is connected by the upper inclined section 31 and the lower straight section 32; without this transition section, the roller blind 3 cannot spontaneously enter the guide rail groove, and even if the bottom of the roller blind 3 is guided into the corresponding guide rail groove by manual guidance, the bottom of the inclined section 31 is easy to get stuck at the top edge of the corresponding guide rail, affecting the smooth lowering of the roller blind 3 and easily causing premature wear of the roller blind 3.

[0039] Furthermore, in order to more easily guide the rolling curtain 3 into the inner guide section 5 or the outer guide section 4, the guide groove can be designed as a funnel-shaped structure that is wide at the top and narrow at the bottom. At the same time, a rotating wheel 6 is provided on the inner side wall of the guide groove (the side wall close to the center of the cold rolling and leveling machine frame 11), which can reduce the friction force when the rolling curtain 3 enters or leaves the guide section and reduce wear. The size of the rotating wheel 6 can be the same or different, and can be set according to actual needs, for example Figure 4As shown in the figure, since the top of the rear side wall of the inner guide section 5 is far away from the corresponding roller blind 3, the rotating wheel 6 in the inner guide section 5 can be gradually reduced from top to bottom, so that the outer edge line of the rotating wheel 6 and the inclination angle of the roller blind 3 are close.

[0040] Further, such as Figure 5 As shown, the rolling shutter 3 is formed by connecting multiple curtain pieces 16, the top of the curtain piece 16 is provided with a top hook, and the bottom of the curtain piece 16 is provided with a bottom hook matching the top hook, and two adjacent curtain pieces 16 are connected together through the top hook and the bottom hook, so that the rolling shutter 3 can be rolled up; different from the single-layer plate structure of the prior art, in this technical solution, the curtain piece 16 is designed as a hollow structure composed of two layers of metal plates, and a foaming agent is filled in the middle of each curtain piece 16 to achieve a good sound insulation effect. Since the foaming agent has a very low density and light weight, this improvement has a slight effect on the performance of the rolling shutter door. In specific implementation, it is preferred to use a sound insulation and flame retardant foaming agent, such as a flame retardant polyurethane foaming agent.

[0041] Furthermore, in order to improve the sound insulation performance and avoid noise from being transmitted from the bottom of the roller blind 3 as much as possible, a bottom sealing component 10 is also provided; Figure 5 As shown, the bottom sealing assembly 10 includes two long strips of sound insulation sealing plates 17 and a connecting plate sandwiched between the two sound insulation sealing plates 17, and the two sound insulation sealing plates 17 and the connecting plate are connected together by bolts to achieve fixation; the sound insulation sealing plates 17 are placed horizontally at the bottom of the frame opening, and the two ends of the sound insulation sealing plates 17 are respectively engaged with the corresponding guide rails on the left and right sides; the upper part of the connecting plate protrudes from the upper surface of the sound insulation sealing plate 17, and the top of the connecting plate is an arc hook 18, and the rotation direction of the arc hook 18 is opposite to that of the bottom hook. At this time, after the rolling curtain 3 falls to the bottom, the arc hook 18 can be hung together with the bottom hook of the lowest curtain piece 16 to achieve the connection between the rolling curtain 3 and the bottom sealing assembly 10.

[0042] Furthermore, a lateral sealing strip 15 is provided in the guide rail groove along the vertical direction, and the lateral sealing strip 15 can fit the roller blind 3 from the side to achieve sealing and sound insulation effects.

[0043] Furthermore, the sound insulation sealing plate 17 is made of fluororubber, which is a high-performance synthetic rubber material with excellent high temperature resistance, oil resistance, and chemical corrosion resistance. In the present application, since the frame leveling liquid has a certain degree of corrosiveness after reacting with some substances on site, and the temperature of the leveling liquid is generally around 65 degrees, it needs to be resistant to high temperature and aging, and has a certain degree of toughness. In addition, since there is a lot of oil pollution on the rolling mill, it needs to have flame retardant properties at the same time, so fluororubber is preferably used. At the same time, the material of the lateral sealing strip 15 is polyamide. This is because PA (polyamide) has high wear resistance, can reduce wear and reduce noise, and it performs well in the friction between the roller shutter 3 and the corresponding track groove. According to actual measurements, the application of the above materials can achieve better implementation effects, and the cost is low and easy to obtain.

[0044] Furthermore, in actual application, it should be ensured that each time the rolling curtain 3 is lifted, it does not exceed the top of the inner guide section 5 or the outer guide section 4. In this way, when the rolling curtain 3 is lowered for the next time, the rolling curtain 3 will automatically move downward along the corresponding guide groove, and then automatically enter the corresponding guide groove without human intervention. If the rolling curtain 3 is raised too high and exceeds the upper limit of the corresponding guide section, when the rolling curtain 3 is lowered for the next time, the rolling curtain 3 can only move in the vertical direction and cannot automatically enter the guide groove. The bottom of the rolling curtain 3 must be manually placed into the corresponding guide section, which will inevitably greatly reduce work efficiency. For this reason, in the embodiment of the present invention, it is also necessary to limit the upper limit position of the rolling curtain 3 by a limiter. For simplicity, the limiter can adopt the limiter provided in the roller drum 1 of the rolling door, and the upper limit position and the lower limit position of the rolling curtain 3 are determined by adjusting the limiter.

[0045] The above technical solution is described in detail below through the implementation process of a specific embodiment:

[0046] In this specific embodiment, the power of the cold rolling and leveling mill 20 is 1000kw, and the annual output is about 1.2 million tons. In order to reduce the purging noise, a cold rolling and leveling mill 11 is arranged outside the cold rolling and leveling mill 20, and the length×width×height of the cold rolling and leveling mill frame 11 is 7300mm×7000mm×5600mm; at the frame opening of the cold rolling and leveling mill frame 11, the length×width×thickness of the door frame is 4500mm×4500mm×70mm, then the length×width×thickness of the first rolling door (lower rolling door) is 4500mm×5500mm×18mm, the length×width×thickness of the second rolling door (upper rolling door) is 4500mm×6200mm×18mm, and the length×width×thickness of the guide rail assembly is 158mm×65mm×4500mm.

[0047] The transmission mechanism of the rolling door is located at the top. The transmission mechanism consists of a coupling, a bearing seat, a servo motor 13 and an electrical control system, and its overall dimensions are 5000mm long, 300mm wide and 431mm high. The length × width × height of the rolling door mounting frame 12 is 368mm × 275mm × 245mm, and the thickness of the steel plate used is 15mm. It is mainly used to support the reel 1 and its transmission mechanism, and plays a stabilizing role; the coupling is used to connect the servo motor 13 and the reel 2, and plays a role in transmitting torque; the bearing seat is used to support the reel 1 and the servo motor 13 transmission, and plays a role in supporting and transmitting force; the servo motor 13 is used to realize the lifting and lowering of the rolling door 3 and provide power elements; the electrical control system includes a controller 14 (such as a PLC, etc.), a limiter, an operating button, etc., which are used to control the start and stop of the rolling door to form a closed-loop control.

[0048] The rolling door adopts an aluminum alloy double-layer curtain piece 16, the dimensions of the curtain piece 16 are 4500mm×18mm×76mm in length×width×height, the upper bend is φ12mm, and the lower bend is φ16mm, which is convenient for mutual connection and winding. The interior is filled with a flame retardant foaming agent, which can well fill the gaps in the curtain piece 16 and play a flame retardant, sound absorbing and sound insulating effect; the dimensions of the bottom sealing component 10 are 4500mm×13mm×41mm in length×width×height, and a groove is designed on the sound insulation sealing plate 17 for easy screw installation. The bottom sealing component 10 is engaged with the bottom of the corresponding guide rail to seal the bottom of the rolling door to prevent noise from escaping.

[0049] In the inner guide section 5, the diameters of the three wheels 6 from top to bottom are φ18mm, φ16mm and φ12mm respectively, and the diameter of the wheel 6 in the outer guide section 4 is φ10mm. The lateral width of each wheel 6 is 42mm, which is mainly used to support and guide the rolling curtain 3 to prevent it from scraping the track and deforming, and also facilitate the up and down movement of the rolling curtain 3. The size of the lateral sealing strip 15 is 158mm×65mm×3500mm in length×width×height. It is installed on both sides of the corresponding guide groove, mainly to seal the rolling curtain 3 and play a role of secondary sound insulation; the design height of the sealing strip is 3500mm, mainly considering that the opening height of the rolling curtain (i.e., the upper limit position) should be set below 3500mm, which can prevent jamming, save material costs, and reduce the operation failure of the rolling door; at the same time, a reinforcing rib plate is also provided between the inner guide section 5 and the inner guide rail 9.

[0050] The installation process is as follows: install the inner guide rail 9 and the outer guide rail 8 on the door frames on both sides of the rolling mill opening, measure the parallelism and verticality, and then install the lateral sealing strip 15 in the corresponding guide rail groove, and keep the lateral sealing strip 15 straight and smooth; then weld the rolling door mounting frame 12 to the channel steel on the top of the cold rolling and leveling machine frame 11, locate the center distance between the roller 1 of the upper rolling door and the roller 1 of the lower rolling door to be 500mm, install the roller 1 on the corresponding rolling door mounting frame 12, adjust the length of the rolling curtain 3 and guide the bottom of the rolling curtain 3 into the corresponding guide rail groove to ensure that the rolling curtain 3 is installed in the guide rail groove centered and vertical to avoid scratching with the lateral sealing strip 15 (the flame retardant polyurethane foaming agent should be injected into the curtain piece 16 in advance, and multiple curtain pieces 16 should be assembled into a rolling curtain 3 in advance); then assemble the transmission mechanism bearing seat, coupling and servo motor 13 and other related spare parts with the reel 2, adjust the center, find the coaxiality and horizontality, and ensure that they are installed in the same straight line; finally, check that all spare parts have been installed, connect and debug the controller 14, and adjust the upper and lower limit positions of the rolling curtain 3 through the limit device, increase the opening and closing interlock of the rolling shutter door, and confirm that the rolling shutter door is not blocked and runs smoothly before putting it into production.

[0051] After multiple actual measurements, it was found that after adopting the sound insulation structure of this specific embodiment, the noise measured at the aforementioned measuring point can be reduced to below 85dB.

[0052] The disclosed embodiments are described above to enable any person skilled in the art to implement or use the present invention. Various modifications of these embodiments are obvious to those skilled in the art, and the general principles defined herein may also be applied to other embodiments without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure is not limited to the embodiments given herein, but is consistent with the broadest scope of the principles and novel features disclosed in this application.

[0053] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sound insulation structure with double rolling doors for a cold rolling mill, characterized in that: The invention comprises a cold rolling and tempering machine frame (11) and two sets of rolling shutter doors arranged on the working surface of a factory building; the cold rolling and tempering machine frame (11) is a hollow house-like structure sleeved on the outside of a cold rolling and tempering machine (20); the cold rolling and tempering machine frame (11) comprises: a rolled piece inlet end face, a rolled piece outlet end face, two side faces, and a closed top end; the rolled piece inlet end face, the rolled piece outlet end face, and the two side faces are connected to form a circumferentially closed rectangular space with a top opening of the house-like structure; the closed top end closes the top opening; a door-like frame opening is opened on one side of the cold rolling and tempering machine frame (11); the rolling shutter door comprises a reel (1), a reel located inside the reel (1); A reel (2) and a rolling curtain (3) for covering the frame opening; a rolling curtain door mounting frame (12) is installed on the top of the cold rolling and leveling machine frame (11); the reel (1) is connected to the cold rolling and leveling machine frame (11) through the rolling curtain door mounting frame (12); the reel (2) is located above the frame opening; the rolling curtain (3) is wound on the reel (2); guide rails are connected to the left and right sides of the frame opening; the inner side of the guide rails is provided with guide rail grooves for accommodating the rolling curtain (3); two sets of rolling curtain doors are arranged up and down, and the reels (2) of the two sets of rolling curtain doors are both located on the inner side of the cold rolling and leveling machine frame (11).

2. The sound insulation structure with double rolling doors for a cold rolling skin-pass mill according to claim 1, characterized in that: The two sets of rolling shutter doors include an upper rolling shutter door and a lower rolling shutter door, the roller shaft (2) of the upper rolling shutter door is located above the roller shaft (2) of the lower rolling shutter door, and the rolling shutter length of the upper rolling shutter door is greater than the rolling shutter length of the lower rolling shutter door; the guide rail includes an inner guide rail (9) matching the lower rolling shutter door, and an outer guide rail (8) matching the upper rolling shutter door.

3. The sound insulation structure with double rolling doors for a cold rolling and skin-passing mill according to claim 2, characterized in that: The line connecting the axis centers of the two sets of rolling shafts (2) of the rolling shutter doors is in the vertical direction.

4. The sound insulation structure with double rolling doors for a cold rolling skin-pass mill according to claim 2, characterized in that: The inner guide rail (9) and the outer guide rail (8) are arranged in parallel in a direction perpendicular to the frame opening, and the inner guide rail (9) and the outer guide rail (8) are fixedly connected together.

5. The sound insulation structure with double rolling doors for a cold rolling and skin-passing mill according to claim 2, characterized in that: It also includes an inner guide section (5) connected to the top of the inner guide rail (9), and an outer guide section (4) connected to the top of the outer guide rail (8); the inner side surface of the inner guide section (5) and the inner side surface of the outer guide section (4) are both provided with guide grooves, the guide groove of the inner guide section (5) is connected to the guide groove of the inner guide rail (9), and the guide groove of the outer guide section (4) is connected to the guide groove of the outer guide rail (8); the top of the guide groove is inclined toward the inside of the cold rolling and leveling machine frame (11).

6. The sound insulation structure with double rolling doors for a cold rolling and skin-passing mill according to claim 5, characterized in that: The guide groove is of a structure that is wide at the top and narrow at the bottom, and a rotating wheel (6) is arranged on the side wall of the guide groove close to the center of the cold rolling and leveling machine frame (11).

7. The sound insulation structure with double rolling doors for a cold rolling skin-pass mill according to claim 1, characterized in that: The rolling curtain (3) is formed by connecting a plurality of curtain pieces (16); a top hook is arranged at the top of the curtain piece (16); and a bottom hook matching the top hook is arranged at the bottom of the curtain piece (16); the curtain piece (16) is a hollow structure composed of two layers of front and rear metal plates, and a foaming agent is filled in the middle of each curtain piece (16).

8. The sound insulation structure with double rolling doors for a cold rolling and skin-passing mill according to claim 2, characterized in that: It also includes a bottom sealing assembly (10); the bottom sealing assembly (10) includes two long strips of sound insulation sealing plates (17) and a connecting plate sandwiched between the two sound insulation sealing plates (17); the sound insulation sealing plates (17) are placed horizontally at the bottom of the frame opening, and the two ends of the sound insulation sealing plates (17) are respectively engaged with the corresponding guide rails on the left and right sides; the upper part of the connecting plate protrudes from the upper surface of the sound insulation sealing plate (17), and the top of the connecting plate is an arc hook (18), and the rotation direction of the arc hook (18) is opposite to that of the bottom hook.

9. The sound insulation structure with double rolling doors for a cold rolling and skin-passing mill according to claim 8, characterized in that: A lateral sealing strip (15) is arranged in the guide rail groove along the vertical direction.

10. The sound insulation structure with double rolling doors for a cold rolling and skin-pass mill according to claim 9, characterized in that: The sound insulation sealing plate (17) is made of fluororubber, and the lateral sealing strip (15) is made of polyamide.

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