A large cooling tower inlet and exhaust port silencer

Abstract

The utility model discloses a large -scale cooling tower inlet and exhaust port silencer, wherein, large -scale cooling tower inlet and exhaust port silencer is applied to cooling tower, and two air inlet sides are symmetrically arranged to the cooling tower, and the inside of cooling tower is provided with the installation cavity corresponding the air inlet side, and the top of cooling tower is provided with the maintenance mouth, and each installation cavity is provided with the lift maintenance mechanism and the sound elimination group, and the lift maintenance mechanism includes the support frame fixed in the installation cavity, the lifting assembly in the support frame and the U -shaped frame connected with the power output end of lifting assembly, and the U -shaped frame is used for carrying the sound elimination group, and wherein, the lifting assembly can drive the U -shaped frame and its carrying sound elimination group and lift to the outside of cooling tower through the maintenance mouth. The utility model technical scheme is aimed at solving the technical problems of difficult maintenance, inconvenient cleaning, long replacement period and the influence of normal operation of cooling tower of existing cooling tower silencer.

Description

Technical Field

[0001] This utility model relates to the field of cooling tower silencing technology, and in particular to a silencing device for the inlet and outlet of a large cooling tower. Background Technology

[0002] Large industrial cooling towers are key cooling equipment in industries such as power, chemical, and metallurgy. The broadband aerodynamic noise and water spray noise they generate during operation cause serious pollution to the surrounding environment. To meet increasingly stringent environmental noise emission standards, installing silencers at the inlet and outlet of cooling towers has become a common practice.

[0003] Currently, most common silencing devices adopt a fixed installation structure, which achieves noise reduction by fixing the silencer on the air inlet side. This traditional structure has obvious drawbacks in practical applications. Specifically, when traditional fixed-installation silencing devices need maintenance or cleaning, they must rely on external hoisting equipment and scaffolding, which not only involves high operational risks and costs but also seriously affects the normal operation cycle of the cooling tower. Utility Model Content

[0004] The main purpose of this utility model is to provide a silencing device for the inlet and outlet of a large cooling tower, which aims to solve the technical problems of existing cooling tower silencing devices, such as difficult maintenance, inconvenient cleaning, long replacement cycle, and impact on the normal operation of the cooling tower.

[0005] To achieve the above objectives, this utility model proposes a large cooling tower inlet and outlet silencing device, which is applied to a cooling tower. The cooling tower has two symmetrically arranged air inlet sides, and an installation cavity is provided inside the cooling tower corresponding to the air inlet side. A maintenance opening communicating with the installation cavity is provided at the top of the cooling tower. Each installation cavity is equipped with a lifting maintenance mechanism and a silencing assembly.

[0006] The lifting and maintenance mechanism includes a support frame fixed in the mounting cavity, a lifting component disposed in the support frame, and a U-shaped frame connected to the power output end of the lifting component. The U-shaped frame is used to support the silencer assembly.

[0007] The lifting assembly can drive the U-shaped frame and the silencer assembly it carries to be raised and lowered to the outside of the cooling tower via the maintenance port.

[0008] In one possible implementation, the silencing assembly includes a plurality of silencing units, which are arranged side-by-side and vertically within the U-shaped frame.

[0009] In one possible implementation, the silencing unit includes a silencing frame and a plurality of silencing discs disposed within the silencing frame.

[0010] In one possible implementation, a guide fitting structure is provided between the purlin frame and the sound-absorbing frame. The guide fitting structure includes a first guide rail disposed on the inner side wall of the purlin frame and a guide groove correspondingly opened on the outer side wall of the sound-absorbing frame and slidably adapted to the first guide rail.

[0011] In one possible implementation, the lifting assembly includes a lead screw vertically disposed within the support frame, a nut cooperating with the lead screw, and a drive motor for driving the lead screw to rotate, wherein the nut is fixedly connected to the U-shaped frame.

[0012] In one possible implementation, the support frame is provided with a vertical second guide rail, and the U-shaped frame is slidably connected to the second guide rail via a slider.

[0013] This utility model's technical solution integrates modular silencing units with a built-in lifting and maintenance mechanism within the cooling tower's internal structure, enabling the overall lifting and external maintenance of the silencing device. This solves the technical problem of traditional fixed silencing devices requiring external hoisting equipment, downtime operations, and high-altitude work risks during maintenance. Simultaneously, the combination of modular silencing units and a guiding structure allows for rapid disassembly and precise positioning of individual silencing units, significantly improving maintenance efficiency and flexibility. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0015] Figure 1 This is a top view of the structure of an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of the frame when it is raised according to an embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of the interior of a cooling tower according to an embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram of the structure of a noise reduction assembly according to an embodiment of the present invention;

[0019] Figure 5 This is a partial enlarged view of the lifting assembly according to an embodiment of the present invention.

[0020] Explanation of icon numbers:

[0021] 1. Cooling tower; 11. Air inlet side; 12. Mounting cavity; 13. Maintenance port;

[0022] 2. Lifting and maintenance mechanism; 21. Support frame; 22. Lifting assembly; 221. Lead screw; 222. Nut; 223. Drive motor; 23. U-shaped frame;

[0023] 3. Silencing assembly; 31. Silencing unit; 311. Silencing frame; 312. Silencing disc;

[0024] 4. Guiding and fitting structure; 41. First guide rail; 42. Guide groove.

[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0027] To address the problems in the background technology, this utility model proposes a silencing device for the inlet and outlet of a large cooling tower 1. The cooling tower 1 has two symmetrically arranged air inlet sides 11. An installation cavity 12 is provided inside the cooling tower 1 corresponding to the air inlet side 11. A maintenance port 13 communicating with the installation cavity 12 is opened at the top of the cooling tower 1. Each installation cavity 12 is equipped with a lifting maintenance mechanism 2 and a silencing assembly 3. The lifting maintenance mechanism 2 includes a support frame 21 fixed within the installation cavity 12, a lifting component 22 disposed within the support frame 21, and a U-shaped frame 23 connected to the power output end of the lifting component 22. The U-shaped frame 23 is used to support the silencing assembly 3. The lifting component 22 can drive the U-shaped frame 23 and the silencing assembly 3 it carries to rise and fall to the outside of the cooling tower 1 via the maintenance port 13.

[0028] Combined with reference Figures 1 to 5 As shown, in this embodiment, the cooling tower 1 includes core structures such as a tower body, an exhaust system, a spray system, a packing layer, and a water collection tank. Multiple air inlets 11 are evenly arranged on one side of the tower body, and their outer walls are equipped with guide louvers to ensure uniform airflow. An exhaust system is installed at the top, creating a stable airflow within the tower by drawing air upwards. The spray system is located above the packing layer, spraying hot water evenly; below it are multi-layered packing supports to support the packing layer, increasing the water-air contact area. The bottom of the tower is a water collection tank to collect the cooled water. The entire structure forms a cooling airflow from bottom to top and a water flow from top to bottom, achieving efficient heat exchange.

[0029] This silencing device is integrated into the structure of the cooling tower 1. Inside the cooling tower 1, corresponding to each air inlet side 11, there is an independent mounting cavity 12. This mounting cavity 12 extends upwards from the bottom of the tower body. A maintenance port 13, communicating with the mounting cavity 12, is located at a corresponding position on the top of the cooling tower 1. The maintenance port 13 is equipped with an openable sealing cover. The mounting cavity 12 houses a complete lifting and maintenance mechanism 2 and a silencing assembly 3. The support frame 21 is fixedly connected to the concrete structure of the mounting cavity 12 by high-strength bolts, providing a stable support foundation for the entire lifting system. The support frame 21 is made of hot-dip galvanized steel, with a rectangular internal cross-section and precisely machined vertical guide rails on both sides.

[0030] The U-shaped frame 23, serving as the load-bearing structure, is constructed from welded steel sections into an upward-opening U-shaped frame. Linear guide rails are precisely installed on its inner wall, while corresponding slider assemblies that mate with the guide rails of the support frame 21 are positioned on its outer side. This dual-guide system ensures the smoothness and precision of the lifting process. The lifting assembly 22, as the core drive component, preferably employs a transmission scheme using a large-diameter trapezoidal lead screw 221 and a copper nut 222. The lead screw 221 is vertically mounted on the central axis of the support frame 21 via upper and lower seated bearings and is driven by a waterproof geared motor. The geared motor at the bottom of the lead screw 221 is fixedly connected to the base of the support frame 21 via a flange, ensuring transmission stability. The outer edge of the copper nut 222 is rigidly connected to the U-shaped frame 23 via a connecting flange. Alternatively, a hydraulic system can be used as the power source, including a motor, oil pump, oil tank, and control valve, which can be installed at or near the bottom of the support frame 21 in a convenient maintenance location. One or two (depending on load and stability requirements) multi-stage telescopic hydraulic cylinders are vertically inverted at the bottom of the support frame 21, with the cylinder body hinged to the support frame 21 and the piston rod tip hinged to the bottom of the U-shaped frame 23. After the hydraulic station is powered on, hydraulic oil enters the rodless chamber of the hydraulic cylinders under the guidance of the control valve, pushing the piston rod to extend stage by stage, lifting the U-shaped frame 23 from the bottom until it reaches the predetermined height. During descent, the control valve switches the oil circuit, and under the weight of the silencer assembly, the hydraulic oil flows back orderly from the rodless chamber to the oil tank, achieving a smooth and controllable descent. The system must be equipped with a hydraulic lock to prevent a fall in case of accidental rupture of the oil pipe.

[0031] The silencing assembly 3 adopts a modular design, consisting of one or more standard-sized silencing units 31. Each silencing unit 31 includes a welded steel frame and internal silencing plates 312 arranged at specific intervals. Under normal operating conditions, the silencing assembly 3 is completely located within the mounting cavity 12, communicating with the outside world through the louvers on the air inlet side 11, effectively reducing the operating noise of the cooling tower 1. When maintenance is required, the operator only needs to open the sealing cover of the top maintenance port 13, start the drive motor 223, and the lifting assembly 22 will drive the U-shaped frame 23 and the entire silencing assembly 3 it carries to rise smoothly until it is fully exposed above the top of the cooling tower 1. At this time, maintenance personnel can conveniently clean, repair, or replace the silencing assembly 3 from the top platform. After maintenance is completed, the drive motor 223 is started in reverse, and the silencing assembly 3 slowly descends with the U-shaped frame 23 to the working position.

[0032] In one possible implementation, the silencing assembly 3 includes a plurality of silencing units 31, which are arranged side-by-side and vertically within the frame 23.

[0033] In one possible implementation, the silencing unit 31 includes a silencing frame 311 and a plurality of silencing plates 312 disposed within the silencing frame 311.

[0034] Combined with reference Figure 4 As shown, in this embodiment, the silencing assembly 3 adopts a modular combination structure, which includes multiple independently manufactured silencing units 31. These silencing units 31 are installed in the U-shaped frame 23 using a combination of side-by-side arrangement and vertical stacking to form an integrated soundproof barrier. Specifically, each silencing unit 31 includes a rectangular frame made of galvanized steel plate or stainless steel, with multiple parallel silencing sheets 312 evenly spaced inside the frame. The silencing sheets 312 are made of waterproof polymer composite sound-absorbing material as the core material and are covered with a stainless steel perforated protective panel to balance the soundproofing effect and ventilation resistance. During installation, the bottom layer of silencing units 31 is first pushed into place along the guide rail on the inner side of the U-shaped frame 23, and then the second layer of units is stacked on top of it. The units are precisely positioned with positioning pins and slots. This arrangement allows the silencing assembly 3 to form a continuous S-shaped airflow channel within a limited space, effectively extending the contact path between the sound waves and the sound-absorbing material. Meanwhile, the modular design ensures that the disassembly and assembly of a single silencing unit 31 will not affect adjacent units. When a local unit needs maintenance due to blockage or damage, it can be raised and lowered outside the tower for flushing or replacement without having to deal with the entire silencing assembly 3.

[0035] In one possible implementation, a guide fitting structure 4 is provided between the purlin frame 23 and the noise-absorbing frame 311. The guide fitting structure 4 includes a first guide rail 41 disposed on the inner side wall of the purlin frame 23, and a guide groove 42 correspondingly opened on the outer side wall of the noise-absorbing frame 311 and slidably adapted to the first guide rail 41.

[0036] Combined with reference Figure 3 As shown, in this embodiment, a precise guiding and fitting structure 4 is provided between the U-shaped frame 23 and the silencing frame 311. This structure includes a first guide rail 41 fixedly installed on the inner sidewalls of both sides of the U-shaped frame 23, and guide grooves 42 correspondingly opened on the outer sidewalls of both sides of the silencing frame 311. The first guide rail 41 is made of steel that has been quenched and precision ground, and has a trapezoidal cross-section that is wider at the top and narrower at the bottom, effectively preventing derailment. The cross-sectional shape of the guide groove 42 is perfectly matched with the first guide rail 41 to form a sliding pair. During installation, the operator lifts the silencing unit 31 to the front of the U-shaped frame 23, and after the guide groove 42 is accurately aligned with the first guide rail 41, the silencing unit 31 can be smoothly pushed into the U-shaped frame 23 along the guide rail. A limit stop is provided at the end of the guide rail to ensure that the silencing unit 31 automatically stops when it reaches the predetermined installation position. For easy positioning, a 30° chamfer is machined at the entrance of the guide rail, and a flared guide structure is correspondingly provided at the entrance of the guide groove 42.

[0037] In one possible implementation, the lifting assembly 22 includes a lead screw 221 vertically disposed within the support frame 21, a nut 222 cooperating with the lead screw 221, and a drive motor 223 for driving the lead screw 221 to rotate, wherein the nut 222 is fixedly connected to the U-shaped frame 23.

[0038] Combined with reference Figure 5 As shown, in this embodiment, the lifting assembly 22 employs a lead screw 221 and nut 222 transmission mechanism, specifically including a lead screw 221 vertically positioned in the center of the support frame 21, a nut 222 precisely fitted to the lead screw 221, and a drive motor 223 driving the lead screw 221 to rotate. The lead screw 221 is preferably a trapezoidal threaded lead screw 221 made of alloy steel, with both ends supported and fixed by upper and lower seated bearings. The upper seated bearing is installed on the top crossbeam of the support frame 21, and the lower seated bearing is installed on the bottom base. The drive motor 223 is a worm gear reducer motor with an electromagnetic brake, installed at the bottom of the support frame 21 via a flange. The motor output shaft is directly connected to the lower end of the lead screw 221 via a flexible coupling. The nut 222 is made of cast tin bronze, with a connecting flange on its outer surface, and is rigidly connected to the back reinforcing plate of the U-shaped frame 23 via high-strength bolts.

[0039] When the drive motor 223 is powered on, it drives the lead screw 221 to rotate. The nut 222, which cooperates with the lead screw 221, converts the rotational motion into linear motion under the constraint of the circumferential limit device, thereby driving the entire U-shaped frame 23 and the silencer assembly 3 to rise and fall vertically. The electromagnetic brake automatically locks the motor shaft when the power is off, forming a double safety guarantee in conjunction with the self-locking characteristic of the trapezoidal lead screw 221. To accurately control the lifting stroke, upper and lower limit travel switches are set at appropriate positions on the support frame 21, which can automatically cut off the motor power when the U-shaped frame 23 reaches the limit position.

[0040] In one possible implementation, the support frame 21 is provided with a vertical second guide rail, and the U-shaped frame 23 is slidably connected to the second guide rail by a slider.

[0041] Specifically, a vertical second guide rail (not shown) is provided on the support frame 21, and the U-shaped frame 23 is slidably connected to the second guide rail via sliders. Specifically, the second guide rail is a heavy-duty linear guide rail, symmetrically arranged on both sides inside the support frame 21, and reliably connected to the columns of the support frame 21 by high-strength bolts. Slider blocks that cooperate with the second guide rail are installed at corresponding positions on both sides of the U-shaped frame 23. The sliders have a circulating ball or roller structure inside, forming a low-friction rolling pair with the guide rail. To ensure smooth operation, at least two sets of sliders are provided on each side, located at the upper and lower ends of the U-shaped frame 23 respectively, forming a stable four-point support structure. The guide rail surface is hardened and precision ground, and the sliders are embedded with self-lubricating material, constituting a complete linear motion system.

[0042] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0043] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A silencer for the inlet and outlet of a large cooling tower, applied to a cooling tower, wherein the cooling tower has two air inlet sides symmetrically arranged around its perimeter, characterized in that, The cooling tower has an installation cavity inside corresponding to the air inlet side. A maintenance port communicating with the installation cavity is located at the top of the cooling tower. Each installation cavity is equipped with a lifting maintenance mechanism and a noise reduction assembly. The lifting and maintenance mechanism includes a support frame fixed in the mounting cavity, a lifting component disposed in the support frame, and a U-shaped frame connected to the power output end of the lifting component. The U-shaped frame is used to support the silencer assembly. The lifting assembly can drive the U-shaped frame and the silencer assembly it carries to be raised and lowered to the outside of the cooling tower via the maintenance port.

2. The silencing device for the inlet and outlet of a large cooling tower according to claim 1, characterized in that, The silencing assembly includes a plurality of silencing units, which are installed in the U-shaped frame in a side-by-side and vertical arrangement.

3. The silencing device for the inlet and outlet of a large cooling tower according to claim 2, characterized in that, The noise reduction unit includes a noise reduction frame and a plurality of noise reduction plates disposed within the noise reduction frame.

4. The silencing device for the inlet and outlet of a large cooling tower according to claim 3, characterized in that, A guide fitting structure is provided between the purlin frame and the sound-absorbing frame. The guide fitting structure includes a first guide rail disposed on the inner side wall of the purlin frame and a guide groove correspondingly opened on the outer side wall of the sound-absorbing frame and slidably adapted to the first guide rail.

5. The silencing device for the inlet and outlet of a large cooling tower according to claim 1, characterized in that, The lifting assembly includes a lead screw vertically arranged in the support frame, a nut cooperating with the lead screw, and a drive motor for driving the lead screw to rotate. The nut is fixedly connected to the U-shaped frame.

6. The silencing device for the inlet and outlet of a large cooling tower according to claim 1, characterized in that, The support frame is provided with a vertical second guide rail, and the U-shaped frame is slidably connected to the second guide rail by a slider.

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