A vibration resistant return device for a chilled water return system

Abstract

The utility model belongs to the technical field of fluid machinery, concretely relates to a kind of anti-vibration backwater device for cooling water backwater system, including water tank and backwater pipe, the top wall of water tank is equipped with mounting port, the inside of water tank is connected by backwater pipe through mounting port;Connecting flange is installed at mounting port, the bottom of connecting flange is connected with the communicating pipe that is communicated with backwater pipe;The other end of communicating pipe is sequentially connected with elbow and gradually expanding pipe, the inner diameter of one end of gradually expanding pipe and elbow connection is less than the inner diameter of the other end of gradually expanding pipe;The other end of gradually expanding pipe is connected with porous pipe;In the application, the cross-sectional area of water flow is enlarged during gradually expanding pipe process, flow rate is reduced, kinetic energy is converted into static pressure energy;Subsequently, impact energy is further dissipated by being dispersed into multiple streams through porous pipe;In this way, the problem of vibration and noise of water tank caused by high flow rate water flow in recovery pipeline is solved.

Description

Technical Field

[0001] This utility model belongs to the field of fluid machinery technology, specifically relating to an anti-vibration return water device for a cooling water return system. Background Technology

[0002] The industrial cooling system in the power workshop of a cigarette factory is a key auxiliary system ensuring the stable operation of cigarette production. Its core function is to provide stable cooling water for equipment and processes in workshops such as tobacco processing, packaging, and air conditioning, removing excess heat generated during production (such as operating heat from tobacco processing equipment and waste heat from the baking process), and maintaining equipment and the environment at suitable temperatures. The cooling devices in the industrial cooling system, as core heat dissipation components, are used to dissipate the heat carried by the return water into the environment, reducing the water temperature to a reusable level. Commonly used cooling devices include cooling towers, cooling water tanks, air coolers, and evaporative condensers. Cooling towers are divided into natural draft cooling towers: relying on air convection for heat dissipation based on the height of the tower, suitable for large power plants, etc.; and mechanical draft cooling towers: equipped with fans for forced ventilation, with high heat dissipation efficiency, widely used in chemical, metallurgical, and other industries.

[0003] In practice, the high-velocity water flow in the return water pipes of industrial cooling systems often leads to water tank vibration and generates a lot of noise. The traditional method is to use flexible connections or throttle valves to control the pipeline from the cooling tower to the water tank. However, using flexible connections or throttle valves results in problems such as large pressure loss and high maintenance costs. Utility Model Content

[0004] The purpose of this invention is to provide an anti-vibration return water device for a cooling water return system. As the water flows through the diffuser, the flow velocity decreases due to the increased cross-sectional area, and the kinetic energy is converted into static pressure energy. Subsequently, the water is dispersed into multiple fine streams through the porous pipe, further dissipating the impact energy. The flexible joint can block the path of vibration transmission, thereby reducing vibration. This invention solves the problems mentioned in the background art.

[0005] To achieve the above technical objectives, the technical solution adopted by this utility model is as follows:

[0006] An anti-vibration return water device for a cooling water return system includes a water tank and a return water pipe. The top wall of the water tank has an installation port, through which the return water pipe connects to the interior of the water tank. A connecting flange is installed at the installation port, and a connecting pipe communicating with the return water pipe is connected to the bottom of the connecting flange. A bend and a diffuser are sequentially connected to the other end of the connecting pipe. The inner diameter of the end of the diffuser connected to the bend is smaller than the inner diameter of the other end of the diffuser. A perforated pipe is connected to the other end of the diffuser, and a baffle is installed at the top of the perforated pipe. A gap is left between the bottom wall of the baffle and the top of the perforated pipe to allow water flow.

[0007] In this application, the connecting flange mainly serves to connect the internal and external components of the water tank, facilitating the design, fabrication, and installation of the device. Since the water in the return pipe flows down from the cooling tower, and the height difference between the cooling tower and the water tank is approximately 30 meters, the water flow has a high velocity. This results in water impacting the water tank during its descent, causing vibration and even significant noise. The diffuser pipe, with one end smaller than the other, reduces the flow velocity due to the increased cross-sectional area, based on Bernoulli's principle. Furthermore, the perforated pipe further disperses the water flow into multiple fine streams, further dissipating the impact energy and reducing vibration to the water tank. In addition, no control valves are used, resulting in relatively low maintenance costs.

[0008] Furthermore, the connecting pipe, bend, and diffuser are integrally formed pipes. This integrally formed pipe is simpler to install and maintain, and has higher practicality.

[0009] Furthermore, the inner diameter of the pipe gradually increases from the end connected to the return water pipe to the other end. This structural design allows for a greater number of pipe sections where flow velocity is reduced, making the reduction of water flow within the pipe more efficient.

[0010] Furthermore, the installation port is located at one corner of the top wall of the water tank; the diffuser and the perforated pipe are arranged collinearly with the geometric center of the water tank. Positioning the water outflow center at the geometric center of the water tank reduces the relative water pressure difference generated during water outflow, thereby effectively reducing water tank vibration, improving water tank stability, and enhancing practicality.

[0011] Furthermore, a flexible joint connects the diffuser and the porous pipe; the outer wall of the flexible joint has at least two connecting ears, and a support structure connects the connecting ears to the side wall of the water tank; the support structure elastically supports the flexible joint. Thus, the flexible joint blocks the transmission path of water flow vibration in the connecting pipe and the diffuser, reducing water tank vibration and noise.

[0012] The support structure includes a support cylinder, a spring, and a connecting lug. A support seat is installed at one end of the support cylinder, and the support seat is connected to the water tank. The other end of the support cylinder is connected to the connecting lug. The spring is installed between the connecting lug and the support cylinder. A connecting shaft connected to the connecting lug is installed on the connecting lug.

[0013] Furthermore, the baffle has a concave side near the porous tube and a convex side. The baffle can disperse the water flow, and this dispersion is uniformly distributed circumferentially; in addition, the reaction force generated by the baffle relative to the water flow can cancel out the impact force brought by the water flow, ensuring the stability and reliability of the device.

[0014] Furthermore, the bend is configured as a U-shaped bend. Compared to a one-piece molded pipe, the U-shaped bend provides an alternative installation method, making it suitable for more application scenarios and highly practical.

[0015] The utility model adopting the above technical solution has the following advantages:

[0016] In this application, as the water flows through the diffuser, the increased cross-sectional area reduces the flow velocity. The porous pipe further disperses the water flow into multiple fine streams, further dissipating the impact energy and reducing vibration in the water tank. The baffles uniformly disperse the water flow circumferentially and also counteract its impact. The flexible joints block the transmission path of vibration in the connecting pipes and diffuser, reducing water tank vibration and noise. The support structure provides elastic support for the flexible joints and diffuser, maintaining support while also reducing vibration through elastic deformation. Furthermore, the device does not use control valves, resulting in relatively low maintenance costs. Attached Figure Description

[0017] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0018] Figure 1 This is a schematic diagram of an embodiment of the anti-vibration return water device for a cooling water return system according to the present invention;

[0019] Figure 2 This is a cross-sectional structural schematic diagram of an embodiment of the anti-vibration return water device for a cooling water return system according to the present invention;

[0020] Figure 3 This is a schematic diagram of the structure after removing the water tank in an embodiment of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure after removing the water tank and flexible joint in the embodiment of this utility model;

[0022] Figure 5 This is a schematic diagram of the support structure in an embodiment of the present utility model;

[0023] The symbols for the main components are explained below:

[0024] 101. Water tank; 102. Return water pipe; 103. Connecting flange; 104. Connecting pipe; 105. Bend; 106. Expanding pipe; 1061. Small diameter end; 1062. Large diameter end; 107. Flexible joint; 1071. End flange; 1072. Connecting lug; 108. Perforated pipe; 1081. Dispersion hole; 109. Baffle; 1091. Fixing rod; 110. Support structure; 1111. Support seat; 1112. Support cylinder; 1113. Spring; 1114. Connecting lug seat; 1115. Connecting shaft. Detailed Implementation

[0025] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that similar or identical parts are referred to by the same reference numerals in the drawings or description. Implementations not shown or described in the drawings are forms known to those skilled in the art. Furthermore, directional terms mentioned in the embodiments, such as "up," "down," "top," "bottom," "left," "right," "front," and "back," are only for reference to the directions in the drawings and are not intended to limit the scope of protection of the present invention.

[0026] like Figures 1 to 5As shown, in one embodiment, an anti-vibration return water device for a cooling water return system includes a water tank 101 and a return water pipe 102. The top wall of the water tank 101 has an installation port, and the return water pipe 102 is connected to the interior of the water tank 101 through the installation port. In the cooling water return system, the cooling tower is installed on the roof of the factory building, which is generally 30 meters high. The return water pipe 102 connects the cooling tower and the water tank 101. A connecting flange 103 is installed at the installation port, and a sealing gasket is installed between the connecting flange 103 and the water tank 101 to provide a seal. A connecting pipe 104 connected to the return water pipe 102 is connected to the bottom of the connecting flange 103. The other end of the connecting pipe 104 is connected to a bend 105 and a diffuser 106 in sequence. The bend 105 is U-shaped, and the inner diameter of the end of the diffuser 106 connected to the bend 105 is smaller than the inner diameter of the other end of the diffuser 106. The other end of the diffuser 106 is connected to a perforated pipe 108. The outer wall of the perforated pipe 108 has a perforation hole 1081, which is arranged in a circumferential array. A baffle 109 is installed on the top of the perforated pipe 108. A gap is left between the bottom wall of the baffle 109 and the top of the perforated pipe 108 to allow water to flow through. As the water flows through the diffuser 106, the increased cross-sectional area reduces the flow velocity. The porous pipe 108 further disperses the water flow into multiple fine streams, dissipating the impact energy and reducing vibrations in the water tank 101. The baffle 109 disperses the water flow; its reaction force relative to the flow direction counteracts the impact force from the initial flow down the return pipe 102, ensuring the stability and reliability of the device. Since the device does not use control valves, maintenance costs are relatively low.

[0027] The connection between the connecting flange 103 and the return water pipe 102 and the connecting pipe 104 can be a heat fusion connection, a clamping connection or a threaded connection, which can be selected according to the type of pipe used; in this embodiment, the difference in inner diameter between the two ends of the expanding pipe 106 (i.e., the large diameter end 1062 and the small diameter end 1061) can be set as needed.

[0028] In fact, the connecting pipe 104, the bend 105, and the expanding pipe 106 are all integrally formed pipes. Therefore, regardless of whether the pipes are made of plastic or stainless steel, the integrally formed pipes are easier to install and maintain, and offer higher practicality.

[0029] In fact, not only can the diffuser 106 be configured with a gradually increasing diameter, but when using a pipe, the inner diameter of the pipe can also be gradually increased from one end connected to the return pipe 102 to the other end. This allows for a wider range of pipe sections where flow velocity can be reduced, making the reduction of water flow within the pipe more efficient.

[0030] In this embodiment, as Figure 3As shown, a flexible joint 107 connects the diffuser 106 and the perforated pipe 108. Two connecting ears 1072 are provided on the outer wall of the flexible joint 107, and a support structure 110 connects the connecting ears 1072 to the side wall of the water tank 101. The support structure 110 elastically supports the flexible joint 107. Thus, the flexible joint 107 blocks the transmission path of vibration in the connecting pipe 104 and the diffuser 106, reducing vibration and noise in the water tank 101. The flexible joint 107 can be made of rubber joints, corrugated pipes, or other elastic joints, as well as specially structured pipe fittings and flexible fillers. It has the functions of vibration isolation, noise reduction, preventing displacement damage to the pipes, and adjusting installation errors.

[0031] Among them, the rubber joint, corrugated pipe and other components are provided with end flanges 1071 at both ends, which facilitates the connection with the diffuser 106 and the perforated pipe 108; and also facilitates the disassembly of the flexible joint 107, the diffuser 106 and the perforated pipe 108.

[0032] In fact, the connection between the porous tube 108 and the baffle 109 is achieved by a fixing rod 1091. The fixing rod 1091 is welded to the baffle 109 and then inserted into the top end of the porous tube 108 and fixed by a retaining ring; or it can be fixed by a pin and a nut.

[0033] In practice, even without the flexible joint 107 installed, a support structure 110 can be installed to support the diffuser 106 and the porous tube 108. The support structure 110 can be connected to the bottom of the diffuser 106, between the diffuser 106 and the porous tube 108, or on the porous tube 108. In this embodiment, the connecting lugs 1072 can also be provided in three or four sizes, corresponding to three or four support structures 110.

[0034] It should be noted that the flexible joint 107 can also be called a flexible pipe joint. It is used in pipe connections. The flexible joint 107 allows the pipe to move axially, laterally or angularly within a certain range to accommodate pipe displacement, vibration and foundation settlement.

[0035] In this embodiment, as Figure 5 As shown, the support structure 110 includes a support cylinder 1112, a spring 1113, and a connecting lug 1114. A support seat 1111 is installed at one end of the support cylinder 1112, and the support seat 1111 is connected to the water tank 101. The other end of the support cylinder 1112 is connected to the connecting lug 1114. A spring 1113 is installed between the connecting lug 1114 and the support cylinder 1112. A connecting shaft 1115 connected to the connecting lug 1072 is installed on the connecting lug 1114.

[0036] Threaded holes can be machined on the side walls of the support base 1111 and the water tank 101, and the support cylinder 1112 and the water tank 101 are connected through the threaded holes, bolts and sealing rings; a hollow cavity is opened at the other end of the support cylinder 1112, and the connecting ear 1114 is inserted into the hollow cavity through a guide rod; a spring 1113 is sleeved on the guide rod, and the two ends of the spring 1113 are fixedly connected to the support cylinder 1112 and the connecting ear 1114.

[0037] In practice, the connecting shaft 1115 in this embodiment can be a smooth rod with a post and threads at the end. The connecting shaft 1115 is rotatably connected to the connecting lug 1072.

[0038] In this embodiment, the installation port is located at the lower right corner of the top wall of the water tank 101; the diffuser 106 and the perforated pipe 108 are arranged collinearly with the geometric center of the water tank 101. This installation method places the outflow center of the water flow at the geometric center of the water tank, which can reduce the relative water pressure difference generated on the water tank 101 when the water flows out, thereby effectively reducing the vibration of the water tank 101; improving the stability of the water tank 101; and has high practicality.

[0039] In fact, in addition to the impact force balancing structure on the horizontal plane, this embodiment also has a structure for radially offsetting the impact force in the vertical direction, as follows: the baffle 109 set at the top of the porous pipe 108 generates an upward force when the water flows out, which radially offsets the downward impact force brought by the water flow; in addition, the side of the baffle 109 near the porous pipe 108 is concave and the other side is convex; thus, the offsetting area is larger and the water flow can be better dispersed radially and circumferentially.

[0040] In this embodiment, the connecting pipe 104, the bend 105, and the expanding pipe 106 are manufactured independently; the bend 105 is configured as a U-shaped bend. Compared with pipes manufactured in one piece, U-shaped bends can also be applied to some usage scenarios and are highly practical.

[0041] The above provides a detailed description of an anti-vibration return water device for a cooling water return system provided by this utility model. The specific embodiments are described only to aid in understanding the method and core concept of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A shockproof backwater device for a cooling water backwater system, comprising a water tank (101) and a backwater pipe (102), a top wall of the water tank (101) being provided with a mounting opening, the backwater pipe (102) being connected to the inside of the water tank (101) through the mounting opening; characterized in that, A connecting flange (103) is installed at the installation port, and a connecting pipe (104) connected to the bottom of the connecting flange (103) is connected to the bottom of the connecting flange (104) and communicates with the return water pipe (102); the other end of the connecting pipe (104) is connected to a bend (105) and a diffuser (106) in sequence, and the inner diameter of the end of the diffuser (106) connected to the bend (105) is smaller than the inner diameter of the other end of the diffuser (106); the other end of the diffuser (106) is connected to a perforated pipe (108), and a baffle (109) is installed on the top of the perforated pipe (108); a gap is left between the bottom wall of the baffle (109) and the top of the perforated pipe (108) to allow water to flow through.

2. The anti-churn return device for a cooling water return system of claim 1, wherein, The connecting pipe (104), the bend (105), and the expanding pipe (106) are integrally formed pipes.

3. The vibration-resistant return water device for a cooling water return system according to claim 2, characterized in that, The inner diameter of the pipe gradually increases from one end connected to the return water pipe (102) to the other end.

4. The anti-churn return device for a cooling water return system of claim 1, wherein, The installation port is located at one corner of the top wall of the water tank (101); the expanding pipe (106) and the porous pipe (108) are arranged collinearly with the geometric center of the water tank (101).

5. The anti-churn return device for a cooling water return system of claim 1, wherein, A flexible joint (107) is connected between the expanding tube (106) and the porous tube (108); the outer wall of the flexible joint (107) is provided with at least two connecting ears (1072), and a support structure (110) is connected between the connecting ears (1072) and the side wall of the water tank (101); the support structure (110) elastically supports the flexible joint (107).

6. The anti-churn return device for a cooling water return system of claim 5, wherein, The support structure (110) includes a support cylinder (1112), a spring (1113), and a connecting lug (1114). One end of the support cylinder (1112) is equipped with a support seat (1111), which is connected to the water tank (101). The other end of the support cylinder (1112) is connected to the connecting lug (1114). The spring (1113) is installed between the connecting lug (1114) and the support cylinder (1112). A connecting shaft (1115) connected to the connecting lug (1072) is installed on the connecting lug (1114).

7. The anti-churn return device for a cooling water return system of claim 1, wherein, The baffle (109) has a concave side near the porous tube (108) and a convex side.

8. The anti-churn return device for a cooling water return system of claim 1, wherein, The bend (105) is configured as a U-shaped bend.

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