A ventilation duct connection structure for electromechanical engineering

Abstract

The present invention relates to the technical field of ventilation duct structures, and in particular to a ventilation duct connection structure for electromechanical engineering, comprising two groups of ventilation ducts, both opposite ends of the two groups of ventilation ducts being installed with fixed flanges, and further comprising a connection mechanism and a sound-absorbing and vibration-reducing mechanism, wherein the connection mechanism is arranged on the opposite side of the two groups of fixed flanges, and is used to connect the sound-absorbing and vibration-reducing mechanism with the two groups of fixed flanges. The present invention can achieve a soft connection between the two groups of ventilation ducts through the mutual cooperation of the connection mechanism and the sound-absorbing and vibration-reducing mechanism, and through the setting of the rubber vibration-reducing component, it can show good damping characteristics and vibration-absorbing capacity when the two groups of ventilation ducts vibrate, thereby achieving the effect of sound absorption and vibration reduction, thereby avoiding affecting the sealing of the ventilation duct, and through the setting of the transverse corrugated structure and the sinusoidal connection structure in the rubber vibration-reducing component, it can further reduce the propagation of noise, thereby avoiding harm to the physical and mental health of the staff.

Description

Technical Field

[0001] The invention relates to the technical field of ventilation duct structures, and in particular to a ventilation duct connection structure for electromechanical engineering. Background Art

[0002] Mechanical and electrical engineering is a comprehensive project that takes mechanical equipment and electrical systems as its main research objects, and uses electronic, computer, automatic control and other technical means to achieve the entire process of equipment design, manufacturing, installation, commissioning, operation, maintenance and management. In mechanical and electrical engineering, the setting of ventilation ducts is indispensable. There are various connection structures for ventilation ducts used in mechanical and electrical engineering. The selection of these structures depends on specific engineering requirements, pipe materials, working environment, cost and other factors.

[0003] When installing existing ventilation ducts, flanges are generally used to fix each ventilation duct. However, the ventilation duct will vibrate when high-speed airflow blows through it. If the connection of the ventilation duct is in a vibrating state for a long time, it is easy to make the structure of the connection of the ventilation duct loose, which greatly affects the sealing of the ventilation duct, and further increases the possibility of leakage at the connection of the ventilation duct. The practicality is not good. In addition, when the high-speed airflow blows through the ventilation duct, a large noise will be generated. In addition, the vibration of the ventilation duct will make the noise more obvious. In the long run, it is easy to cause harm to the physical and mental health of the staff. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the existing ventilation ducts in the prior art will generate vibration and noise when high-speed airflow blows through them. In the long run, this will not only affect the sealing of the ventilation ducts, but also cause harm to the physical and mental health of the workers. A ventilation duct connection structure for electromechanical engineering is proposed.

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

[0006] A ventilation duct connection structure for electromechanical engineering, comprising two groups of ventilation ducts, both opposite ends of the two groups of ventilation ducts being provided with fixed flanges, and further comprising:

[0007] A connecting mechanism and a sound-absorbing and vibration-damping mechanism, wherein the connecting mechanism is arranged on one side opposite to the two groups of fixed flanges and is used to connect the sound-absorbing and vibration-damping mechanism to the two groups of fixed flanges, wherein the sound-absorbing and vibration-damping mechanism comprises two groups of fixed rubbers, wherein the two groups of fixed rubbers are respectively connected to the connecting mechanism on one side facing the two groups of fixed flanges, and a rubber vibration-damping assembly is commonly arranged on the opposite sides of the two groups of fixed rubbers, wherein the rubber vibration-damping assembly comprises two groups of first rubber rings and two groups of second rubber rings, wherein the two groups of first rubber rings and the two groups of second rubber rings are arranged alternately and fixedly connected to each other, wherein the positions of the two groups of second rubber rings are higher than the positions of the two groups of first rubber rings, and the opposite sides of the two groups of fixed rubbers are respectively fixedly connected to one side of a group of first rubber rings and a group of second rubber rings in the rubber vibration-damping assembly;

[0008] The fixed vibration reduction mechanism is arranged on the connecting mechanism and is used to fix the two groups of ventilation pipes on the external wall and reduce the vibration generated by the two groups of ventilation pipes.

[0009] Preferably, the two groups of the first rubber rings and the two groups of the second rubber rings are both provided with a transverse corrugated structure.

[0010] Preferably, the connecting mechanism comprises two groups of connecting frames, and the two groups of connecting frames are detachably mounted on the opposite sides of the two groups of fixing flanges through fixing nuts, and the opposite sides of the two groups of connecting frames are provided with mounting grooves, and multiple groups of through holes are evenly penetrated on the outer walls of the two groups of mounting grooves, and multiple groups of sockets corresponding to the through holes on the two groups of mounting grooves are penetrated on the outer sides of the two groups of fixing rubbers, and fixing pins are inserted into the through holes and the sockets.

[0011] Preferably, a protection mechanism is also included, which includes a folding guard plate, both ends of the folding guard plate are fixedly connected to the opposite sides of the two groups of connecting frames, the two groups of the first rubber rings and the two groups of the second rubber rings are both located inside the folding guard plate, and the gap between the two groups of the first rubber rings and the two groups of the second rubber rings and the folding guard plate is a sealed cavity, an injection tube is fixedly installed on the top of the folding guard plate, and the sealed cavity is connected to the outside through the injection tube.

[0012] Preferably, multiple groups of infiltration grooves are provided on the outer walls and inner walls of the two groups of installation grooves.

[0013] Preferably, both inner corners and outer corners of the two groups of mounting grooves are provided with round chamfers.

[0014] Preferably, the fixed vibration reduction mechanism includes four groups of anti-vibration brackets and four groups of dampers, wherein two groups of the anti-vibration brackets are symmetrically installed at both ends of one group of connecting frames, and the other two groups of the anti-vibration brackets are symmetrically installed on both sides of the other group of connecting frames, and the ends of the four groups of anti-vibration brackets away from the two groups of connecting frames are fixedly connected to the external wall, wherein two groups of dampers are symmetrically installed at the top of one group of connecting frames, and the other two groups of dampers are symmetrically installed at the top of the other group of connecting frames, and the ends of the four groups of dampers away from the two groups of connecting frames are fixedly connected to the connecting frames, and the four groups of dampers are fixedly connected to the external wall through the connecting frames.

[0015] Preferably, it also includes an auxiliary vibration reduction mechanism, which includes a partition frame and two groups of partition plates. The partition frame is fixedly installed on the inner wall of the ventilation duct, the two groups of partition plates are both located inside the partition frame, and the two ends of the two groups of partition plates are respectively fixedly connected to the inner walls on both sides of the partition frame.

[0016] Preferably, the partition frame and the two groups of partition plates are made of sound absorbing material.

[0017] Preferably, semicircular edges are provided at the inner edge of the partition frame and the outer edge of the partition plate.

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] 1. The present invention can realize soft connection between two groups of ventilation pipes through the mutual cooperation of the connecting mechanism and the sound-absorbing and vibration-reducing mechanism, and through the arrangement of the rubber vibration-reducing assembly in the sound-absorbing and vibration-reducing mechanism, it can show good damping characteristics and vibration-absorbing ability when the two groups of ventilation pipes vibrate, thereby achieving the effect of sound absorption and vibration reduction, thereby avoiding affecting the sealing of the ventilation ducts. In addition, through the arrangement of the transverse corrugated structure and the sinusoidal connecting structure in the rubber vibration-reducing assembly, the aerodynamic noise in the ventilation pipe can be further reduced, thereby further enhancing the sound absorption effect, reducing the propagation of noise, and thus avoiding harm to the physical and mental health of the staff. At the same time, it can more effectively absorb and adapt to multi-dimensional deformation, improve the sealing reliability between the two groups of ventilation pipes, and smoothly increase the contact area between the rubber vibration-reducing assembly and the wind, thereby enhancing the effect of sound absorption and vibration reduction without affecting the wind propagation.

[0020] 2. The present invention can make the soft connection part between the two groups of ventilation pipes have good elasticity in the horizontal direction by setting the transverse corrugated structure on the first rubber ring and the two groups of second rubber rings in the rubber vibration reduction assembly. When the ventilation pipe is displaced or changes in size in the horizontal direction due to temperature changes, equipment vibrations, etc., the transverse corrugations can adapt to such changes by their own transverse extension or contraction, thereby preventing the soft connection from being damaged due to horizontal tension or pressure. The setting of the corrugated structure has a certain buffering and regulating effect on the flow of air. When the air flows in the ventilation pipe, the transverse corrugations can make the airflow more stable and reduce the turbulence and eddy current of the airflow. Turbulence and eddy current are one of the important reasons for generating noise. By reducing these unstable airflow phenomena, the aerodynamic noise in the ventilation pipe can be effectively reduced, thereby further enhancing the sound absorption effect.

[0021] 3. The present invention can make the airflow more evenly distributed in the pipe by setting a sinusoidal connection structure between the first rubber ring and the two groups of second rubber rings in the rubber vibration reduction assembly. The curve shape can guide the airflow to gradually diffuse and mix in different directions, avoiding the concentration or rarefaction of airflow in local areas, and can reduce the turbulence of the airflow, thereby significantly reducing the turbulence noise in the ventilation system.

[0022] 4. The present invention provides physical and chemical protection for the first rubber ring and the second rubber ring by setting a protective mechanism and utilizing the folding guard plate and silicone oil in the protective mechanism, thereby greatly increasing the service life of the first rubber ring and the second rubber ring. At the same time, the presence of silicone oil can not only reduce the aging rate, but also silicone oil has good damping properties. When vibration is transmitted to the silicone oil layer through the rubber layer, the silicone oil can absorb the vibration energy again through internal molecular friction and viscosity, thereby reducing the transmission of vibration.

[0023] 5. The present invention can assist the sound-absorbing and vibration-reducing mechanism in absorbing sound and reducing vibration at the connection between the two groups of ventilation pipes by setting an auxiliary vibration-reducing mechanism. Since the partition frame and the partition plate in the auxiliary vibration-reducing mechanism are made of sound-absorbing material, and the sound-absorbing material has certain elasticity and damping properties, it can absorb and dissipate vibration energy. When the vibration of the ventilation pipe is transmitted to the interior of the partition frame and the partition plate inside the partition frame, the partition frame and the partition plate are subjected to vibration or sound waves. At this time, the partition frame and the partition plate can buffer the vibration through their own deformation and internal friction, thereby reducing the transmission of vibration.

[0024] 6. The present invention can make the airflow flow more smoothly when passing through the auxiliary vibration reduction mechanism by setting the semicircular edges on the partition frame and the partition plate. Compared with the sharp right-angle edges, the semicircular edges can reduce the separation of the airflow and the generation of vortices. When the airflow encounters the right-angle edges, it is easy to form a local turbulent area, which increases the airflow resistance. The semicircular edges enable the airflow to change direction more smoothly, reducing the pressure loss caused by airflow turbulence, improving the efficiency of the ventilation system, and reducing the energy consumption of the fan. Sharp edges can easily cause unstable flow and turbulent noise of the airflow, while the semicircular edges can improve the flow state of the airflow and reduce noise, thereby assisting the sound-absorbing and vibration-reducing mechanism to absorb sound and reduce vibration at the connection between the two sets of ventilation pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall axial structure of a ventilation duct connection structure for electromechanical engineering proposed by the present invention.

[0026] Figure 2 This is a schematic diagram of the overall bottom structure of a ventilation duct connection structure for electromechanical engineering proposed by the present invention.

[0027] Figure 3 This is a schematic diagram of the sealing cavity and injection pipe structure of a ventilation duct connection structure for electromechanical engineering proposed by the present invention.

[0028] Figure 4 This is a schematic structural diagram of a first rubber ring and a second rubber ring of a ventilation duct connection structure for electromechanical engineering proposed by the present invention.

[0029] Figure 5 This is a schematic diagram of the installation groove and infiltration groove structure of a ventilation duct connection structure for electromechanical engineering proposed by the present invention.

[0030] Figure 6 This is a schematic diagram of the fixed rubber and folding guard plate structure of a ventilation duct connection structure for electromechanical engineering proposed by the present invention.

[0031] Figure 7 This is a schematic diagram of a half-section structure of a folding guard plate of a ventilation duct connection structure for electromechanical engineering proposed by the present invention.

[0032] In the figure: 1 ventilation pipe, 2 partition frame, 3 semicircular edge, 4 fixing flange, 5 fixing nut, 6 connecting frame, 7 fixing pin, 8 anti-vibration bracket, 9 connecting frame, 10 damper, 11 fillet, 12 infiltration groove, 13 installation groove, 14 fixing rubber, 15 first rubber ring, 16 second rubber ring, 17 folding guard plate, 18 injection pipe, 19 sealing cavity, 20 partition plate, 21 plug hole. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] Reference Figures 1 to 4 A ventilation duct connection structure for electromechanical engineering comprises two groups of ventilation pipes 1, each of which is provided with a fixing flange 4 at one opposite end of the two groups of ventilation pipes 1, and a connecting mechanism is provided on the opposite sides of the two groups of fixing flanges 4, and a sound-absorbing and vibration-reducing mechanism and a fixed vibration-reducing mechanism are provided on the connecting mechanism, which are respectively used to reduce the vibration and noise generated when wind passes through the connection between the two groups of ventilation pipes 1 and to fix the two groups of ventilation pipes 1 on an external wall and to reduce the vibration generated by the two groups of ventilation pipes 1, and the connecting mechanism is used to connect the sound-absorbing and vibration-reducing mechanism with the two groups of fixing flanges 4, and the sound-absorbing and vibration-reducing mechanism comprises two groups of fixing rubbers 14, and the two groups of fixing rubbers 14 are respectively connected to the connecting mechanism on one side facing the two groups of fixing flanges 4, and a rubber vibration-reducing assembly is provided on the opposite sides of the two groups of fixing rubbers 14.

[0035] Reference Figures 3 to 7The rubber vibration reduction assembly includes two groups of first rubber rings 15 and two groups of second rubber rings 16. Since the first rubber rings 15 and the second rubber rings 16 are both made of rubber materials, and the rubber materials can show good damping characteristics and vibration absorption capabilities when subjected to vibration or impact due to their unique physical and chemical properties, and can absorb the vibration generated when the wind passes through the ventilation duct connection structure, thereby reducing the vibration. At the same time, the noise generated by the vibration is also reduced, which has the effect of sound absorption and vibration reduction. The two groups of first rubber rings 15 and the two groups of second rubber rings 16 are staggered and fixedly connected to each other. The positions of the two groups of second rubber rings 16 are higher than the positions of the two groups of first rubber rings 15. The opposite sides of the two groups of fixed rubbers 14 are respectively fixedly connected to one side of a group of first rubber rings 15 and a group of second rubber rings 16 in the rubber vibration reduction assembly. Since the first rubber rings 15 and the second rubber rings 16 are connected vertically up and down when connected, a sinusoidal connection structure is formed. The sinusoidal structure helps to make the airflow more evenly distributed in the pipeline. Its curve shape can guide the airflow to gradually diffuse and mix in different directions, avoid the airflow concentration or sparseness in local areas, and can reduce the turbulence of the airflow, so that the turbulence noise in the ventilation system can be significantly reduced. The two groups of first rubber rings 15 and the two groups of second rubber rings 16 are all A transverse corrugated structure is provided. The setting of the transverse corrugations can make the soft connection part in the ventilation duct connection structure have good elasticity in the horizontal direction. When the ventilation pipe 1 is displaced or changes in size in the horizontal direction due to temperature changes, equipment vibrations, etc., the transverse corrugations can adapt to such changes by their own transverse extension or contraction, thereby preventing the soft connection from being damaged due to horizontal tension or pressure. The setting of the corrugated structure has a certain buffering and regulating effect on the flow of air. When the air flows in the ventilation pipe 1, the transverse corrugations can make the airflow more stable and reduce the turbulence and eddy current phenomenon of the airflow. Turbulence and eddy current are one of the important reasons for generating noise. By reducing these unstable airflow phenomena, the aerodynamic noise in the ventilation duct can be effectively reduced, thereby further enhancing the sound absorption effect. When the transverse corrugated structure and the sinusoidal connection structure are combined with each other, there are the following benefits. First: Enhanced adaptive sealing. After the wave structure itself is added with similar longitudinal corrugations formed by the upper and lower offsets, it has better adaptability to vertical dimensional changes and unevenness, greatly improving the reliability of the seal and reducing the risk of leakage. Second: Multi-dimensional deformation adaptation can more effectively absorb and adapt to deformation. Third: The contact area with the wind is smoothly increased, which enhances the effect of sound absorption and vibration reduction without affecting wind propagation.

[0036] Reference Figures 1 to 7The connecting mechanism includes two groups of connecting frames 6, which are detachably mounted on opposite sides of the two groups of fixing flanges 4 through fixing nuts 5, and mounting grooves 13 are provided on opposite sides of the two groups of connecting frames 6. Multiple groups of through holes are evenly penetrated on the outer walls of the two groups of mounting grooves 13. Multiple groups of plug holes 21 corresponding to the through holes on the two groups of mounting grooves 13 are penetrated on the outer sides of the two groups of fixing rubbers 14. Fixing pins 7 are inserted into the through holes and the plug holes 21. The fixing pins 7 are inserted into the through holes and the plug holes 21, so that the two groups of fixing rubbers 14 are fixed in the two groups of mounting grooves 13, so that the sound absorption and vibration reduction mechanism can be fixed on the two groups of fixing flanges 4 under the action of the connecting mechanism.

[0037] Reference Figures 2 to 7 , a protective mechanism is commonly provided on one side opposite to the two groups of connection frames 6, which is used to protect the sound-absorbing and vibration-reducing mechanism. The protective mechanism includes a folding guard plate 17, and both ends of the folding guard plate 17 are fixedly connected to the opposite sides of the two groups of connection frames 6, respectively. The two groups of first rubber rings 15 and the two groups of second rubber rings 16 are both located inside the folding guard plate 17, and the gaps between the two groups of first rubber rings 15 and the two groups of second rubber rings 16 and the folding guard plate 17 are sealed cavities 19. An injection pipe 18 is fixedly installed on the top of the folding guard plate 17, and the sealed cavity 19 is connected to the outside through the injection pipe 18. Silicone oil is filled into the sealed cavity 19 through the injection pipe 18. The presence of the folding guard plate 17 and the silicone oil plays a role of physical and chemical protection for the first rubber ring 15 and the second rubber ring 16, which greatly increases the service life of the first rubber ring 15 and the second rubber ring 16. At the same time, the presence of silicone oil can not only reduce aging speed, and silicone oil has good damping properties. When the vibration is transmitted to the silicone oil layer through the rubber layer, the silicone oil can absorb the vibration energy again through the internal molecular friction and viscosity, thereby reducing the transmission of the vibration. The folding guard plate 17 can cooperate with the small movement of the first rubber ring 15 and the second rubber ring 16 to play a physical protection role at the same time. Multiple groups of infiltration grooves 12 are provided on the outer wall and the inner wall of the two groups of mounting grooves 13. When filling with silicone oil, a small amount of silicone oil will enter the infiltration groove 12 of the mounting groove 13, and then fill the gap between the mounting groove 13 and the fixed rubber 14 through capillary action, thereby enhancing the sealing effect, and immersing into the fixed pin 7 in the fixed rubber 14, thereby having a better protective effect on the fixed rubber 14 and the fixed pin 7. In addition, round chamfers 11 are provided at the inner corners and the outer corners of the two groups of mounting grooves 13, and the setting of the round chamfers 11 can facilitate the silicone oil to fill the gap.

[0038] Reference Figure 1 to Figure 2The fixed vibration reduction mechanism includes four groups of anti-vibration brackets 8 and four groups of dampers 10, two groups of anti-vibration brackets 8 are symmetrically installed at both ends of one group of connecting frames 6, and the other two groups of anti-vibration brackets 8 are symmetrically installed on both sides of the other group of connecting frames 6. The ends of the four groups of anti-vibration brackets 8 away from the two groups of connecting frames 6 are fixedly connected to the external wall, two groups of dampers 10 are symmetrically installed at the top of one group of connecting frames 6, and the other two groups of dampers 10 are symmetrically installed at the top of the other group of connecting frames 6. The ends of the four groups of dampers 10 away from the two groups of connecting frames 6 are fixedly connected with connecting frames 9, and the four groups of dampers 10 are fixedly connected to the external wall through the connecting frames 9. The settings of the anti-vibration brackets 8 and the dampers 10 can reduce the vibrations generated by the two groups of ventilation pipes 1 when high-speed airflow blows through.

[0039] Reference Figures 1 to 7 , auxiliary vibration reduction mechanisms are provided at positions near the fixed flanges 4 inside the two groups of ventilation pipes 1, which are used to assist the sound-absorbing and vibration-reducing mechanisms in absorbing and reducing sound at the connection points of the two groups of ventilation pipes 1. The auxiliary vibration reduction mechanisms include a partition frame 2 and two groups of partition plates 20. The partition frame 2 is fixedly installed on the inner wall of the ventilation pipe 1, and the two groups of partition plates 20 are both located inside the partition frame 2, and the two ends of the two groups of partition plates 20 are respectively fixedly connected to the inner side walls of the partition frame 2 on both sides. The partition frame 2 and the two groups of partition plates 20 are made of sound-absorbing materials. The sound-absorbing materials have certain elasticity and damping properties and can absorb and dissipate vibration energy. When the vibration of the ventilation pipe 1 is transmitted to the interior of the partition frame 2 and the partition plate 20 inside the partition frame 2, the partition frame 2 and the partition plate 20 are subjected to vibration or sound waves. At this time, the partition frame 2 and the partition plate 20 can absorb the sound through their own deformation and internal The friction of the parts is used to buffer the vibration, thereby reducing the transmission of vibration. Semicircular edges 3 are provided at the inner edge of the partition frame 2 and the outer edge of the partition plate 20. The semicircular edges 3 are processed on the edges of the partition frame 2 and the partition plate 20 to make the airflow flow more smoothly. Compared with the sharp right-angle edges, the semicircular edges 3 can reduce the separation of the airflow and the generation of vortices. When the airflow encounters the right-angle edge, it is easy to form a local turbulent area, which increases the airflow resistance, and the semicircular edge 3 enables the airflow to change direction more smoothly, reducing the pressure loss caused by the turbulent airflow, improving the efficiency of the ventilation system, and reducing the energy consumption of the fan. Sharp edges are likely to cause unstable flow and turbulent noise of the airflow, and the semicircular edge 3 can improve the flow state of the airflow, reduce noise, and then assist the sound absorption and vibration reduction mechanism to absorb sound and reduce vibration at the connection between the two groups of ventilation pipes 1.

[0040] In the present invention, the ventilation duct used in electromechanical engineering will vibrate when a high-speed airflow blows through it. If the connection is in a vibrating state for a long time, the structure will easily become loose. The device designs the connection of the ventilation duct, reduces the vibration of the connection during ventilation, and enhances the sound absorption effect.

[0041] The fixing flange 4 is connected to the connection frame 6 through the fixing nut 5, the fixing rubber 14 is inserted into the installation groove 13, and the fixing pin 7 is inserted to fix it. Then, the device is fixed on the top by using the anti-vibration bracket 8, the connecting frame 9 and the damper 10. The setting of the anti-vibration bracket 8 and the damper 10 can reduce the vibration of the two sets of ventilation pipes 1 when the high-speed airflow blows through. Then, the injection pipe 18 is opened and the silicone oil is filled into the sealing cavity 19.

[0042] A partition frame 2 is provided at the connection of the ventilation pipe 1, and a partition plate 20 is installed inside the partition frame 2. The inner edge of the partition frame 2 and the outer edge of the partition plate 20 are both treated with semicircular edges 3. When the vibration of the ventilation pipe 1 is transmitted to the inside of the partition frame 2 and the partition plate 20 inside the partition frame 2, the partition frame 2 and the partition plate 20 are subjected to vibration or sound waves. Since the partition frame 2 and the partition plate 20 are both made of sound-absorbing materials, and the sound-absorbing materials have certain elasticity and damping properties, they can absorb and dissipate vibration energy, so that the partition frame 2 and the partition plate 20 can buffer the vibration through their own deformation and internal friction, thereby reducing the transmission of vibration; and the semicircular edge 3 treatment of the edges of the partition frame 2 and the partition plate 20 can make the airflow flow more smoothly. Compared with sharp right-angle edges, the semicircular edge 3 can reduce the separation of airflow and the generation of vortices. When the airflow encounters a right-angle edge, it tends to form a local turbulent area, increasing the airflow resistance, while the semicircular edge 3 enables the airflow to change direction more smoothly, reducing the pressure loss caused by airflow turbulence, improving the efficiency of the ventilation system, and reducing the energy consumption of the fan; sharp edges tend to cause unstable flow and turbulent noise of the airflow, while the semicircular edge 3 can improve the flow state of the airflow and reduce noise.

[0043] When the wind passes through the ventilation duct connection structure, since the first rubber ring 15 and the second rubber ring 16 are both made of rubber materials, and the rubber material can show good damping characteristics and vibration absorption capacity when subjected to vibration or impact due to its unique physical and chemical properties, it can absorb the vibration generated when the wind passes through the ventilation duct connection structure, thereby reducing the vibration, and the noise generated by the vibration is also reduced, which plays the effect of sound absorption and vibration reduction, and the first rubber ring 15 and the second rubber ring 16 themselves have a transverse corrugated structure, and the setting of the transverse corrugation can make the soft connection part in the ventilation duct connection structure have good elasticity in the horizontal direction. When the ventilation duct 1 produces displacement or size changes in the horizontal direction due to temperature changes, equipment vibrations, etc., the transverse corrugation can adapt to such changes by its own transverse extension or contraction, and avoid the soft connection from being damaged due to horizontal tension or pressure; and the setting of the corrugated structure has a certain buffering and regulating effect on the flow of airflow. When the air flows in the ventilation duct 1, the transverse corrugation can make the airflow more stable and reduce the turbulence and vortex phenomena of the airflow. Turbulence and eddies are one of the important causes of noise. By reducing these unstable airflow phenomena, the aerodynamic noise in the ventilation duct can be effectively reduced.

[0044] The first rubber ring 15 and the second rubber ring 16 are connected vertically up and down to form a sinusoidal connection structure, which helps to make the airflow more evenly distributed in the duct. Its curved shape can guide the airflow to gradually diffuse and mix in different directions, avoid the phenomenon of airflow concentration or sparseness in local areas, and reduce the turbulence of the airflow, thereby significantly reducing the turbulence noise in the ventilation system.

[0045] The combination of the two has the following benefits: First, enhanced adaptive sealing. After the wave structure itself is added with similar longitudinal corrugations formed by the upper and lower misalignment, it has better adaptability to the vertical dimensional changes and unevenness, greatly improving the reliability of the seal and reducing the risk of leakage. Second, multi-dimensional deformation adaptation can more effectively absorb and adapt to deformation. Third, the contact area with the wind is smoothly increased, which enhances the effect of sound absorption and vibration reduction without affecting wind propagation.

[0046] Since the upper surfaces of the first rubber ring 15 and the second rubber ring 16 are wrapped by the silicone oil in the sealing cavity 19, and a folding guard plate 17 is provided on the outside, the existence of the folding guard plate 17 and the silicone oil plays a role of physical and chemical protection for the first rubber ring 15 and the second rubber ring 16, greatly increasing the service life of the first rubber ring 15 and the second rubber ring 16; at the same time, the existence of silicone oil can not only reduce the speed of aging, but also silicone oil has good damping characteristics. When the vibration is transmitted to the silicone oil layer through the rubber layer, the silicone oil can absorb the vibration energy again through the internal molecular friction and viscosity, reducing the transmission of vibration. The folding guard plate 17 can cooperate with the small movement of the first rubber ring 15 and the second rubber ring 16 and play a role of physical protection at the same time.

[0047] When the silicone oil is filled, a small amount of silicone oil will enter the infiltration groove 12 of the installation groove 13, and then fill the gap between the installation groove 13 and the fixing rubber 14 through capillary action, thereby enhancing the sealing effect, and penetrate into the fixing pin 7 in the fixing rubber 14, thus providing better protection for the fixing rubber 14 and the fixing pin 7. The setting of the rounded chamfer 11 can facilitate the silicone oil to fill the gap.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A ventilation duct connection structure for electromechanical engineering, comprising two sets of ventilation ducts (1), wherein opposite ends of the two sets of ventilation ducts (1) are both provided with fixed flanges (4), characterized in that: Also includes: A connecting mechanism and a sound absorbing and vibration damping mechanism, wherein the connecting mechanism is arranged on one side opposite to the two groups of fixed flanges (4) and is used to connect the sound absorbing and vibration damping mechanism to the two groups of fixed flanges (4); the sound absorbing and vibration damping mechanism comprises two groups of fixed rubbers (14); the two groups of fixed rubbers (14) are respectively connected to the connecting mechanism on one side facing the two groups of fixed flanges (4); and a rubber vibration damping assembly is commonly arranged on the opposite sides of the two groups of fixed rubbers (14); the rubber vibration damping assembly comprises two groups of first rubber rings (15) and two groups of second rubber rings (16); the two groups of first rubber rings (15) and the two groups of second rubber rings (16) are arranged alternately and fixedly connected to each other; the positions of the two groups of second rubber rings (16) are both higher than the positions of the two groups of first rubber rings (15); and the opposite sides of the two groups of fixed rubbers (14) are respectively fixedly connected to one side of one group of first rubber rings (15) and one group of second rubber rings (16) in the rubber vibration damping assembly; A fixed vibration reduction mechanism, the fixed vibration reduction mechanism being arranged on the connecting mechanism and used for fixing the two sets of ventilation pipes (1) on an external wall and reducing vibration generated by the two sets of ventilation pipes (1); The connection mechanism comprises two groups of connection frames (6), the two groups of connection frames (6) are detachably mounted on opposite sides of the two groups of fixing flanges (4) through fixing nuts (5), and the opposite sides of the two groups of connection frames (6) are each provided with a mounting groove (13), the outer walls of the two groups of mounting grooves (13) are evenly penetrated with a plurality of through holes, the outer sides of the two groups of fixing rubbers (14) are each penetrated with a plurality of plug holes (21) corresponding to the through holes on the two groups of mounting grooves (13), and fixing pins (7) are inserted into the through holes and the plug holes (21); The invention also comprises a protection mechanism, the protection mechanism comprising a folding guard plate (17), the two ends of the folding guard plate (17) being fixedly connected to opposite sides of the two groups of connection frames (6), the two groups of the first rubber rings (15) and the two groups of the second rubber rings (16) being located inside the folding guard plate (17), and the gap between the two groups of the first rubber rings (15) and the two groups of the second rubber rings (16) and the folding guard plate (17) being a sealed cavity (19), the top of the folding guard plate (17) being fixedly mounted with an injection pipe (18), the sealed cavity (19) being connected to the outside through the injection pipe (18).

2. A ventilation duct connection structure for electromechanical engineering according to claim 1, characterized in that: The two groups of the first rubber rings (15) and the two groups of the second rubber rings (16) are both provided with a transverse corrugated structure.

3. A ventilation duct connection structure for electromechanical engineering according to claim 1, characterized in that: Multiple groups of infiltration grooves (12) are provided on the outer walls and inner walls of the two groups of installation grooves (13).

4. A ventilation duct connection structure for electromechanical engineering according to claim 3, characterized in that: The inner corners and outer corners of the two groups of mounting grooves (13) are both provided with rounded chamfers (11).

5. A ventilation duct connection structure for electromechanical engineering according to claim 1, characterized in that: The fixed vibration reduction mechanism comprises four groups of anti-vibration brackets (8) and four groups of dampers (10), wherein two groups of the anti-vibration brackets (8) are symmetrically mounted at both ends of one group of connection frames (6), and the other two groups of the anti-vibration brackets (8) are symmetrically mounted on both sides of the other group of connection frames (6), and the ends of the four groups of anti-vibration brackets (8) away from the two groups of connection frames (6) are fixedly connected to an external wall, wherein two groups of the dampers (10) are symmetrically mounted at the top of one group of connection frames (6), and the other two groups of the dampers (10) are symmetrically mounted at the top of the other group of connection frames (6), and the ends of the four groups of dampers (10) away from the two groups of connection frames (6) are fixedly connected to a connection frame (9), and the four groups of dampers (10) are fixedly connected to an external wall via the connection frame (9).

6. A ventilation duct connection structure for electromechanical engineering according to claim 1, characterized in that: It also includes an auxiliary vibration reduction mechanism, the auxiliary vibration reduction mechanism including a partition frame (2) and two groups of partition plates (20), the partition frame (2) is fixedly mounted on the inner wall of the ventilation pipe (1), the two groups of partition plates (20) are both located inside the partition frame (2), and the two ends of the two groups of partition plates (20) are respectively fixedly connected to the inner side walls of the partition frame (2).

7. A ventilation duct connection structure for electromechanical engineering according to claim 6, characterized in that: The partition frame (2) and the two sets of partition plates (20) are both made of sound-absorbing material.

8. A ventilation duct connection structure for electromechanical engineering according to claim 7, characterized in that: Semicircular edges (3) are provided at the inner edge of the partition frame (2) and the outer edge of the partition plate (20).

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