An inverted molded cylindrical cold water tank

Abstract

This utility model discloses an inverted cylindrical cold water tank, belonging to the field of cold water tank forming technology. It includes a top cover and several ring wall plates, which are stacked from top to bottom and welded to form a tank body. The top cover includes a frame and several top plates, which are laid on the frame to form a conical tank top. It also includes a piping system, which is set inside the tank body. The piping system includes a low-level pipe, a central main pipe, a high-level pipe, and an extended column pipe. The low-level pipe is located near the bottom of the tank body, and the high-level pipe is located near the top of the tank body. The central main pipe is vertically located at the center of the tank body, and the lower half of the central main pipe is connected to the low-level pipe, while the upper half of the central main pipe is connected to the high-level pipe. The top of the central main pipe extends upward into the top cover to form an extended column pipe, which can be connected to external equipment through the top cover. The extended column pipe can be used to install a hanging basket, which facilitates the spraying of the insulation layer on the outer wall of the tank and reduces construction costs.

Description

Technical Field

[0001] This utility model relates to the field of cold water tank molding technology, specifically to a cylindrical cold water tank formed by inverted molding. Background Technology

[0002] In large-scale building energy systems, chilled water tanks are key energy storage devices, and their construction quality directly affects the system's energy efficiency and service life. For large tanks, which are water tanks with a height exceeding 25m and a diameter greater than 20m, their massive size makes it impossible to prefabricate and transport them as a whole in the factory. Therefore, they must be constructed on-site using a segmented construction method. On-site manufacturing presents several challenges: First, the lack of high-precision molds makes precision control difficult. The tank body is formed by stacking and welding ring wall panels, while the conical top is assembled and welded from thick steel plates. The cumulative dimensional errors generated during the processing and assembly of the curved structure severely affect the welding quality and the tank's sealing performance. In particular, the requirements for controlling the alignment of the wall panel seams and the curvature of the surface are extremely stringent. Second, there are difficulties in constructing the external insulation layer. The tank's external wall requires an overall polyurethane insulation layer, but the site is limited, with the minimum distance between adjacent tanks and between the tank and the main structure being only 2 meters. Traditional articulated boom lifts cannot cover the work area. If conventional suspended platform construction is used, repeated disassembly and reassembly of equipment around the tank is necessary, which is not only inefficient but also significantly increases the safety risks of working at heights. Therefore, a structure for a large-size cold water storage tank that can be stably formed and has low requirements for construction equipment is needed. Utility Model Content

[0003] The purpose of this invention is to provide an inverted cylindrical cold water tank, which solves the problems of insufficient on-site forming accuracy and high requirements for site and equipment in the construction of existing large-size cold water tanks.

[0004] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows: A cylindrical cold water tank formed by inversion includes a top cover and several ring-shaped wall plates. The ring-shaped wall plates are stacked from top to bottom and welded to form a tank body. The top cover includes a frame and several top plates, which are laid on the frame to form a conical tank top. The tank also includes a piping system disposed within the tank body. The piping system includes a low-level pipe, a central main pipe, a high-level pipe, and an extended column pipe. The low-level pipe is located near the bottom of the tank body, the high-level pipe is located near the top of the tank body, and the central main pipe is vertically disposed within the tank body. The central main pipe is connected to the lower part of the low-level pipe and the upper part of the central main pipe is connected to the high-level pipe. The top of the central main pipe extends upward into the top cover to form the extended column pipe. The external equipment of the top cover can be sleeved with the extended column pipe. The central main pipe can provide auxiliary support for the tank body, and the extended column pipe can be used to install a basket, which is convenient for spraying the insulation layer on the outer wall of the tank. It makes full use of the tank body's own structure to form support, occupies less space and eliminates the need for large hoisting equipment, thus reducing construction costs.

[0005] Furthermore, the top cover is also provided with a pressure balancing chamber, and an exhaust port is provided on the side wall of the extended column tube near the top cover. The extended column tube and the central main tube are provided with a partition plate. The pressure balancing chamber is detachably connected to the top of the extended column tube, and the exhaust port is connected to the pressure balancing chamber for balancing the air pressure inside and outside the tank. It can be installed using the extended column tube.

[0006] Furthermore, the low-level pipeline includes a support and a first water pipe. The support is disposed on the bottom surface of the tank, and a limiting groove is provided on the top surface of the support. The first water pipe is disposed in the limiting groove. The high-level pipeline includes a hanger, a second water pipe, and a support pad. The hanger is disposed near the top of the tank, the support pad is disposed in the hanger, and the second water pipe is disposed on the support pad. The support pad is elastic and is used for water storage and dispensing. It can also absorb vibrations during water inflow and outflow to prevent vibrations from affecting the stability of the tank.

[0007] Furthermore, it also includes a first drain pipe and a second drain pipe, which are arranged radially along the tank body. An insulation element is provided between the upper and lower halves of the central main pipe. The lower half of the central main pipe is connected to one end of the first drain pipe, and the other end of the first drain pipe extends out of the tank body. The lower half of the central main pipe is connected to one end of the second drain pipe, and the other end of the second drain pipe extends out of the tank body. This can separate water at different temperature levels, facilitate water intake, and prevent internal turbulence.

[0008] Furthermore, it also includes an upper diffuser and a lower diffuser. The upper part of the tank is provided with a ring beam, the upper diffuser is set on the ring beam, and the lower diffuser is set near the bottom of the tank to uniformly heat the water at the same depth and prevent turbulence caused by internal temperature differences from damaging the tank.

[0009] Preferably, the tank is also provided with a liquid level balancing pipe. One end of the liquid level balancing pipe is located at the top of the tank, and the other end extends downward along the inner wall of the tank and penetrates the inner wall of the tank to communicate with the external environment. This is used to balance the internal and external air pressure when draining water, and to prevent air pressure imbalance from causing internal bubbles, which could corrode pipes and water pumps.

[0010] As a better option, the outer wall of the connection between the ring wall plate and the top cover is provided with an edge banding piece, which extends outward to form a rain shield to prevent rainwater from the top and sides from corroding the wall of the tank.

[0011] Preferably, it also includes at least one water outlet, which is disposed on the outer side wall of the tank and is used to connect a water pump for direct drainage and cleaning of the tank.

[0012] Preferably, the top cover is provided with multiple windows around the center of the tank. These windows are used to install lifting columns during installation and to install light-transmitting windows after installation, thus facilitating the provision of installation space and serving as a means of light transmission.

[0013] As an even better feature, a lightning rod is provided in the middle of the top cover. The lightning rod is connected to the outer column tube and grounded through the central main tube, resulting in a strong current conduction effect.

[0014] The beneficial effects of this utility model are as follows: (1) The inverted cylindrical cold water tank uses multiple lifting devices, namely electric hoists, to form a synchronous lifting system instead of a large crane to lift the cold water tank from top to bottom. The lifting column of the lifting device penetrates the top cover and is arranged. Through centralized control, the ring wall panels move synchronously upward during the layered inversion, eliminating the need for large equipment such as articulated boom lifts. In addition, the external insulation construction is carried out by a rotating electric basket to carry the spraying personnel, realizing a large-area coverage spraying operation with a single equipment. The support part of the electric basket can be installed on the outer column pipe, supporting the basket to rotate and move around the outer wall of the tank, which facilitates the completion of the insulation layer spraying operation on the outer wall of the tank. The basket occupies less external space and makes full use of the tank's own structure for support. Construction can be carried out in a limited space, which is convenient and has low construction cost. The central main pipe of the cold water tank itself is used as support, which achieves the purpose of eliminating the need for large engineering equipment, resulting in low cost and high construction efficiency.

[0015] (2) The inverted cylindrical cold water tank is formed by decomposing the tank body into standardized ring wall plates and on-site laid cone tops, which are inverted and welded from top to bottom, eliminating the need for large equipment and reducing costs. The tank body is equipped with low-level pipes installed on supports, high-level pipes installed on elastic pads and suspended, and the central main pipe is divided into upper and lower parts by insulation, which can play a certain internal support role. Diffusers are provided at the top and bottom of the tank body. When the tank body is storing and discharging water, the internal and external pressures are balanced, the tank body is subjected to low pressure, and the use status is stable. Attached Figure Description

[0016] Figure 1 A cross-sectional structural diagram of the inverted cylindrical cold water tank provided by this utility model; Figure 2 Provided by this utility model Figure 1 Cross-sectional view of part A above; Figure 3 Provided by this utility model Figure 1 Cross-sectional view of part B above; Figure 4 Provided by this utility model Figure 1 A magnified view of part C above; Figure 5 Provided by this utility model Figure 1 A magnified view of part D above; Figure 6 A structural diagram of the top cover of the inverted cylindrical cold water tank provided by this utility model; Figure 7 A schematic diagram of the installation of the lifting device for the inverted cylindrical cold water tank provided by this utility model; Figure 8 A top view of the inverted cylindrical cold water tank top cover provided by this utility model during installation; Figure 9 A half-sectional view of the inverted cylindrical cold water tank provided by this utility model; Figure 10 A structural diagram of the diffuser arrangement of the inverted cylindrical cold water tank provided by this utility model; Figure 11 Structural diagram of the lower diffuser of the inverted cylindrical cold water tank provided by this utility model; Figure 12 The structural diagram of the upper diffuser of the inverted cylindrical cold water tank provided by this utility model; Figure 13 The suspended platform layout diagram provided by this utility model.

[0017] Figure label: 1. Top cover; 11. Frame; 12. Top plate; 13. Lightning rod; 14. Pressure balance chamber; 15. Edge trim; 16. Rain cover; 17. Window; 18. Exhaust window; 19. Ring beam; 2. Ring wall panel; 3. Piping system; 31. Low-level pipe; 311. First water pipe; 312. Support; 32. Central main pipe; 33. First drainage pipe; 331. Second drainage pipe; 332. Outlet; 34. High-level pipe; 341. Second water pipe; 342. Hanger; 343. Pad; 35. Insulation component; 36. Extended column pipe; 361. Exhaust port; 37. Lower diffuser; 38. Upper diffuser; 39. Liquid level balance pipe; 41. Lifting column; 42. Lifting device. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0019] like Figures 1-13 As shown, this embodiment discloses an inverted cylindrical cold water tank, including a top cover 1 and several ring wall plates 2. The ring wall plates 2 are stacked from top to bottom and welded to form a tank body. The top cover 1 includes a frame 11 and several top plates 12. The top plates 12 are laid on the frame 11 to form a conical tank top. It also includes a piping system 3, which is disposed inside the tank body. The piping system 3 includes a low-level pipe 31, a central main pipe 32, a high-level pipe 34, and an extended column pipe 36. The low-level pipe 31 is disposed near the bottom of the tank body, the high-level pipe 34 is disposed near the top of the tank body, and the central main pipe 32 is vertically disposed at the center of the tank body. The lower half of 2 is connected to the low-level pipe 31, and the upper half of the central main pipe 32 is connected to the high-level pipe 34. The top of the central main pipe 32 extends upward into the top cover 1 to form an extended column pipe 36. The external equipment of the top cover 1 can be connected to the extended column pipe 36. The central main pipe 32 provides support for the inside of the tank. The central main pipe 32 is rigidly connected to the bottom of the tank. The extended column pipe 36 can be used as a support for the rotating basket. The tank's own structure is fully utilized to complete the insulation layer spraying operation on the outer surface of the tank. It eliminates the need for large equipment, and the rotating basket can move on the top cover 1. The external space occupied during the spraying operation is small, making it suitable for construction in narrow spaces.

[0020] Furthermore, the top cover 1 is also provided with a pressure balancing chamber 14. An exhaust port 361 is provided on the side wall of the extended column tube 36 near the top cover 1. The extended column tube 36 and the central main tube 32 are provided with a partition plate. The pressure balancing chamber 14 is detachably connected to the top of the extended column tube 36, and the exhaust port 361 is connected to the pressure balancing chamber 14. The pressure balancing chamber 14 is installed on the extended column tube 36. The pressure balancing chamber 14 is provided with a valve to balance the pressure difference inside the tank. At the same time, the pressure balancing chamber 14 seals the upper end of the extended column tube 36 to prevent water accumulation and internal corrosion. The pressure balancing chamber 14 can be quickly disassembled when the tank needs maintenance, which is convenient for installing and maintaining equipment.

[0021] Furthermore, the low-level pipe 31 includes a support 312 and a first water pipe 311. The support 312 is set on the bottom surface of the tank, and a limiting groove is provided on the top surface of the support 312. The first water pipe 311 is set in the limiting groove. The high-level pipe 34 includes a hanger 342, a second water pipe 341, and a support 343. The hanger 342 is set near the top of the tank, the support 343 is set in the hanger 342, and the second water pipe 341 is set on the support 343. The support 343 is elastic. Both the first water pipe 311 and the second water pipe 341 are used for water storage and water discharge. The second water pipe 341 uses the elastic support 343 to absorb the impact during water inflow and outflow, preventing vibration from affecting the stability of the tank.

[0022] Furthermore, it also includes a first drain pipe 33 and a second drain pipe 331. The first drain pipe 33 and the second drain pipe 331 are arranged radially along the tank body. An insulation component 35 is provided between the upper and lower halves of the central main pipe 32. The lower half of the central main pipe 32 is connected to one end of the first drain pipe 33, and the other end of the first drain pipe 33 extends out of the tank body. The lower half of the central main pipe 32 is connected to one end of the second drain pipe 331, and the other end of the second drain pipe 331 extends out of the tank body. They are used to output water at different depths. The water at different depths in the tank body has different temperatures to prevent uneven heating caused by the mixing of hot and cold water. Water at different depths is discharged by the two drain pipes. The central main pipe 32 is divided into upper and lower parts separated by the insulation component 35 to avoid stress deformation of the central main pipe 32 due to the temperature difference. The insulation component 35 is filled and molded with foam material.

[0023] Preferably, the tank also includes an upper diffuser 38 and a lower diffuser 37. A ring beam 19 is provided at the top of the tank. The upper diffuser 38 is set on the ring beam 19, and the lower diffuser 37 is set near the bottom of the tank. The two diffusers are used to even out the water temperature at the same depth, ensuring the uniformity of the temperature at the same layer and preventing damage to the tank from temperature differences. Water of different temperatures mixed together will form turbulence, which will cause cavitation on the tank. The water with lower temperature is at the bottom and the water with higher temperature is at the top, which makes it convenient to take water for use.

[0024] More preferably, the upper diffuser 38 and the lower diffuser 37 are both laid in an octagonal network and the pipe structure is the same. By increasing the area of ​​the same layer, the temperature of the water at the same depth is made uniform, and the mixing of hot and cold water in the tank is prevented from forming turbulence.

[0025] Preferably, the tank is also equipped with a liquid level balancing pipe 39. One end of the liquid level balancing pipe 39 is located at the top of the tank, and the other end extends downward along the inner wall of the tank and penetrates the inner wall of the tank to communicate with the external environment. This prevents cavitation and siphon damage from occurring in the lower part of the tank when the water pump is pumping. The lower diffuser 37 is 300mm away from the bottom of the tank to prevent the pump from drawing sediment from the bottom of the tank and to leave space for water flow below the lower diffuser 37. Cavitation risk: The air pressure in the sealed tank will drop sharply as the water level drops, forming negative pressure, which will cause the tank to be pressurized and cavitation bubbles to form at the water pump impeller. The rupture of the cavitation bubbles will cause impact, resulting in a sharp decrease in the life of the water pump. The lower opening of the liquid level balancing pipe 39 is lower than the lowest operating water level in the tank, which is located at the lower diffuser 37. The upper end of the liquid level balancing pipe 39 is higher than the highest water level at the top of the tank, which can balance the internal and external pressures when storing and discharging water.

[0026] Furthermore, an edge banding 15 is provided on the outer wall of the connection between the ring wall plate 2 and the top cover 1. The edge banding 15 extends outward to form a rain shield 16. The edge banding 15 is an L-shaped angle steel. One side wall of the edge banding 15 is welded to the side wall of the ring wall plate 2, and the upper side wall supports the top plate 12. The rain shield 16 is welded to the outer side wall of the edge banding 15 and extends outward and downward to prevent rainwater from directly splashing onto the outer wall of the tank. At the same time, the water accumulated on this layer of the top cover 1 flows outward to prevent rainwater from flowing along the tank wall and causing corrosion.

[0027] Preferably, it also includes at least one water outlet 332, which is provided on the outer wall of the tank. The water outlet 332 is equipped with a valve for direct drainage. The water outlet 332 is located at different heights of the tank for convenient water discharge and cleaning.

[0028] More preferably, an exhaust window 18 is also provided on the top cover 1, which is used to balance the internal air pressure and for observation.

[0029] Furthermore, the top cover 1 is provided with multiple windows 17 around the center of the tank. These windows 17 are used to install the lifting column 41 during installation and to install the light-transmitting window after installation. The windows 17 are located near the edge of the top cover 1 and are rectangular or circular. After the lifting column 41 is installed on the ground, its upper end protrudes from the window 17. A lifting device 42 is installed at the top of the lifting column 41. The lifting device 42 is connected to the frame 11 by a chain. By having multiple lifting devices 42 pull the frame 11 upward together, the entire tank is moved upward, realizing the inverted forming of the cold water storage tank from top to bottom. This method requires less space and has lower requirements for construction equipment. The lifting device 42 is an electric hoist controlled by a controller.

[0030] More preferably, a lightning rod 13 is provided in the middle of the top cover 1. The lightning rod 13 is connected to the outer extension column tube 36. The lightning rod 13 is installed at the highest point of the tank and is introduced to the ground by the central main tube 32 to play the role of preventing lightning strikes.

[0031] In one embodiment, an annular positioning groove is provided on the ground, and inclined supports are provided on both sides of the positioning groove. The annular wall plate 2 is placed in the positioning groove to fix its position and shape. After the upper layer of the annular wall plate 2 is formed, it is lifted upward to a certain height, and the lower layer of the annular wall plate 2 is placed in the positioning groove. The gap between the two layers of the annular wall plate 2 is welded to ensure the accuracy of the tank forming.

[0032] The construction process of this cylindrical cold water storage tank is as follows: The ground at the installation location is cleared and hardened. A frame 11 is welded onto the ground. Top plates 12 are then laid onto the frame 11 to form a top cover 1. Lifting columns 41 and lifting devices 42 are positioned at the top cover 1. After being hoisted to a certain height by multiple lifting devices 42, the ring wall panels 2 are placed below the top cover 1 and welded together. Edge trim 15 and rain guards 16 are welded at the connection between the ring wall panels 2 and the top cover 1. A ring beam 19 is welded internally. After welding, accessories such as the upper diffuser 38 are installed, and the process is repeated upwards. Hoist the upper ring wall plate 2 and place it below the upper ring wall plate 2, aligning the edges of the two. Then, lower the upper ring wall plate 2 and weld the gap between them. Repeat the above steps until the tank reaches the installation height. Finally, form the tank bottom and bottom pipe. After the tank is formed, connect the support part of the hoisting basket to the outer column pipe 36. Release the hoisting basket and manually spray the insulation layer on the surface of the tank. After the spraying is completed, install the lightning rod 13, pressure balance chamber 14, and outlet valve 332 and other accessories.

[0033] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and any modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A cylindrical cold water tank formed by inversion, comprising a top cover (1) and a plurality of ring wall plates (2), wherein the plurality of ring wall plates (2) are stacked from top to bottom and welded to form a tank body, the top cover (1) comprising a frame (11) and a plurality of top plates (12), wherein the plurality of top plates (12) are laid on the frame (11) to form a conical tank top, characterized in that: It also includes a piping system (3), which is installed inside the tank. The piping system (3) includes a low-level pipe (31), a central main pipe (32), a high-level pipe (34), and an extended column pipe (36). The low-level pipe (31) is located near the bottom of the tank, the high-level pipe (34) is located near the top of the tank, the central main pipe (32) is vertically installed in the center of the tank, and the lower half of the central main pipe (32) is connected to the low-level pipe (31), the upper half of the central main pipe (32) is connected to the high-level pipe (34), and the top of the central main pipe (32) extends upward into the top cover (1) to form the extended column pipe (36). External equipment can be connected to the extended column pipe (36) through the top cover (1).

2. The inverted cylindrical cold water tank according to claim 1, characterized in that: The top cover (1) is also provided with a pressure balance chamber (14). An exhaust port (361) is provided on the side wall of the extended column tube (36) near the top cover (1). The extended column tube (36) and the central main tube (32) are provided with a partition plate. The pressure balance chamber (14) is detachably connected to the top of the extended column tube (36), and the exhaust port (361) is connected to the pressure balance chamber (14).

3. The inverted cylindrical cold water tank according to claim 1, characterized in that: The low-level pipe (31) includes a bracket (312) and a first water pipe (311). The bracket (312) is disposed on the bottom surface of the tank body, and a limiting groove is provided on the top surface of the bracket (312). The first water pipe (311) is disposed in the limiting groove. The high-level pipe (34) includes a hanger (342), a second water pipe (341), and a support (343). The hanger (342) is disposed near the top of the tank body, and the support (343) is disposed in the hanger (342). The second water pipe (341) is disposed on the support (343), and the support (343) is elastic.

4. The inverted cylindrical cold water tank according to claim 1, characterized in that: It also includes a first drain pipe (33) and a second drain pipe (331), the first drain pipe (33) and the second drain pipe (331) are arranged radially along the tank body, a heat insulation element (35) is provided between the upper half and the lower half of the central main pipe (32), the lower half of the central main pipe (32) is connected to one end of the first drain pipe (33), the other end of the first drain pipe (33) extends out of the tank body, the lower half of the central main pipe (32) is connected to one end of the second drain pipe (331), and the other end of the second drain pipe (331) extends out of the tank body.

5. The inverted cylindrical cold water tank according to claim 1, characterized in that: It also includes an upper diffuser (38) and a lower diffuser (37). The upper part of the tank is provided with a ring beam (19). The upper diffuser (38) is disposed on the ring beam (19), and the lower diffuser (37) is disposed near the bottom of the tank.

6. The inverted cylindrical cold water tank according to claim 2, characterized in that: The tank is also equipped with a liquid level balancing pipe (39). One end of the liquid level balancing pipe (39) is located at the top of the tank, and the other end extends downward along the inner wall of the tank and penetrates the inner wall of the tank to communicate with the external environment.

7. The inverted cylindrical cold water tank according to claim 1, characterized in that: An edge banding piece (15) is provided on the outer wall of the connection between the ring wall plate (2) and the top cover (1), and the edge banding piece (15) extends outward to form a rainproof eave (16).

8. The inverted cylindrical cold water tank according to claim 1, characterized in that: It also includes at least one outlet (332), at least one of the outlets (332) being disposed on the outer side wall of the tank.

9. The inverted cylindrical cold water tank according to claim 1, characterized in that: The top cover (1) is provided with multiple windows (17) around the center of the tank. The multiple windows (17) are used to install lifting columns (41) during installation and to install light-transmitting windows after installation.

10. The inverted cylindrical cold water tank according to any one of claims 1-9, characterized in that: A lightning rod (13) is provided in the middle of the top cover (1), and the lightning rod (13) is connected to the outer extension tube (36).

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