Spherical tank

Abstract

According to the scheme, the spherical tank comprises a spherical tank body, and a manhole is formed in the bottom of the spherical tank body; the flange cover is arranged on the manhole and can seal the manhole, and a storage space used for containing materials is defined between the flange cover and the spherical tank body; the heat exchange tubes are arranged on the flange cover in a penetrating mode and stretch into the storage space, inlets and outlets of the heat exchange tubes are located outside the storage space, the flange cover is sealed on the manhole located in the bottom of the spherical tank body, the heat exchange tubes are arranged on the flange cover, installation of the heat exchange tubes is facilitated, high-temperature heat exchange media are introduced into openings of the heat exchange tubes, and the heat exchange tubes are not prone to falling off. The high-temperature heat exchange medium enters the part, located in the storage space, of the heat exchange pipe, can exchange heat with the material and then is discharged from an outlet of the heat exchange pipe, so that crystal precipitates at the bottom of the liquid material are directly heated, the physical and chemical characteristics of the liquid material are maintained, and it is guaranteed that the material stored in the spherical tank body can reach the needed working temperature and storage temperature. And meanwhile, the energy consumption is reduced.

Description

Technical Field

[0001] This application relates to the field of spherical tanks, and particularly to a spherical tank. Background Art

[0002] A spherical tank is a spherical pressure tank, generally used for storing material media such as gases and liquids. During the manufacturing and installation of a spherical tank, for materials with high requirements for storage temperature, the physical and chemical properties of the materials will change due to low ambient temperature or storage temperature, such as crystallization precipitating from the liquid state. When storing such materials, it is usually necessary to lay thermal insulation materials outside the spherical tank equipment and install electric heating blocks on the outer surface of the spherical tank to ensure the temperature of the materials stored inside. Installing electric heating blocks outside the spherical shell is costly and energy-consuming. At the same time, considering that the electric heating device is arranged inside the outer thermal insulation layer of the spherical tank, there is a potential safety hazard of fire accidents. Summary of the Utility Model

[0003] To solve the above problems, this application provides a spherical tank.

[0004] According to one aspect of the embodiments of this application, a spherical tank is disclosed. The spherical tank includes a spherical tank body with a manhole at the bottom; a flange cover arranged on the manhole and capable of closing the manhole, and a storage space for accommodating materials is formed between the flange cover and the spherical tank body; at least one heat exchange tube, the heat exchange tube penetrates through the flange cover and extends into the storage space, and both the inlet and outlet of the heat exchange tube are located outside the storage space.

[0005] In an exemplary embodiment, at least one first through hole and at least one second through hole are provided on the flange cover; the heat exchange tube includes a medium inlet section, a heat exchange section, and a medium outlet section that are connected in sequence. The inlet of the heat exchange tube is located on the medium inlet section, the outlet of the heat exchange tube is located on the medium outlet section, the heat exchange section is located inside the storage space, one end of the medium inlet section passes through the first through hole from one end of the heat exchange section, and one end of the medium outlet section passes through the second through hole from the other end of the heat exchange section.

[0006] In an exemplary embodiment, one end of the heat exchange section is arc-connected to the medium inlet section, and the other end is arc-connected to the medium outlet section; the shape of the heat exchange section is circular arc-shaped; both the medium inlet section and the medium outlet section are perpendicular to the flange cover; flange plates are provided on the inlet and outlet of the heat exchange tube.

[0007] In an exemplary embodiment, a valve is provided on at least one of the medium inlet section and the medium outlet section; the valve is located outside the spherical tank body; valves are provided on both the medium inlet section and the medium outlet section.

[0008] In an exemplary embodiment, a first heat-insulating layer is provided on a portion of the medium inlet section located outside the storage space; a second heat-insulating layer is provided on a portion of the medium outlet section located outside the storage space.

[0009] In an exemplary embodiment, the first through hole and the second through hole are spaced apart; first welding grooves are provided at two axial ends of the flange cover corresponding to the first through hole, and an inner diameter of the first welding groove is larger than an inner diameter of the first through hole; second welding grooves are provided at two axial ends of the flange cover corresponding to the second through hole, and an inner diameter of the second welding groove is larger than an inner diameter of the second through hole.

[0010] In an exemplary embodiment, the inner diameter of the first welding groove gradually decreases in a direction approaching the first through hole; the inner diameter of the second welding groove gradually decreases in a direction approaching the second through hole.

[0011] In an exemplary embodiment, the flange cover includes a cylinder body and a cover body. The top opening of the cylinder body is sleeved on the manhole, and a storage space is formed between the cylinder body and the spherical tank body. The cover body is detachably connected to the bottom edge of the cylinder body, and the cover body is configured to be able to cover or open the bottom opening of the cylinder body. The heat exchange tube penetrates through the cover body; the medium inlet section and the medium outlet section are distributed in a mid-span manner with respect to the center of the cover body.

[0012] In an exemplary embodiment, one side of the cover body is rotatably connected to the cylinder body, and the other side is connected to the bottom edge of the cylinder body by bolts; a handle is provided on the cover body, and the heat exchange tube is located between the handle and the rotatable connection position of the cover body; or the peripheral side of the cover body is connected to the bottom edge of the cylinder body by bolts; the heat exchange tube extends into the spherical tank body, and the heat exchange tube is located below the lowest liquid level of the spherical tank body.

[0013] In an exemplary embodiment, the spherical tank further includes a first connecting pipe, a delivery pump, a heat source device, and a second connecting pipe. The heat source device is used to heat the heat exchange medium. One end of the first connecting pipe is connected to the inlet of the heat exchange tube, the other end of the first connecting pipe is connected to the first end of the delivery pump, the second end of the delivery pump is connected to the heat exchange medium outlet of the heat source device, one end of the second connecting pipe is connected to the outlet of the heat exchange tube, and the other end of the second connecting pipe is connected to the heat exchange medium inlet of the heat source device.

[0014] The technical solutions provided by the embodiments of the present application at least include the following beneficial effects:

[0015] The spherical tank body of the spherical tank disclosed in this application is provided with a flange cover. The space enclosed by the inner cavity of the spherical tank body and the flange cover at the manhole is used as a storage space for accommodating materials. When the temperature of the liquid material stored in the storage space decreases, the liquid material is likely to crystallize and form bottom precipitation. The flange cover of this application is closed on the manhole at the bottom of the spherical tank body, and the heat exchange tube is arranged on the flange cover, which is convenient for the installation of the heat exchange tube. By introducing a high-temperature heat exchange medium into the opening of the heat exchange tube, the high-temperature heat exchange medium enters the part of the heat exchange tube located in the storage space, can exchange heat with the material and then be discharged from the outlet of the heat exchange tube, so as to directly heat the crystal precipitation at the bottom of the liquid material, maintain the physical and chemical properties of the liquid material, ensure that the stored material in the spherical tank body can reach the required working temperature and storage temperature, reduce production costs, and at the same time reduce energy consumption.

[0016] It should be understood that the above general description and the following detailed description are only exemplary and do not limit this application. Brief Description of the Drawings

[0017] The drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application.

[0018] Figure 1 Schematic diagram of the composition of the spherical tank provided for an embodiment;

[0019] Figure 2 Front view of the structure of the flange cover and the heat exchange tube provided for an embodiment;

[0020] Figure 3 Structural diagram of the heat exchange tube provided for an embodiment;

[0021] Figure 4 Top view of the structure of the flange cover and the heat exchange tube provided for an embodiment;

[0022] Figure 5 Cross-sectional view of the flange cover along the axis of the first through hole or the second through hole provided for an embodiment.

[0023] Reference numerals: 100 - spherical tank body, 110 - flange cover, 120 - heat exchange tube, 130 - support, 211 - cylinder body, 212 - cover body, 213 - rotating shaft, 221 - inlet, 222 - outlet, 231 - first through hole, 232 - second through hole, 240 - valve, 250 - flange plate, 310 - medium inlet section, 320 - heat exchange section, 330 - medium outlet section, 410 - first welding groove, 510 - handle. Detailed Description of the Embodiment

[0024] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; rather, these exemplary embodiments are provided so that this application will be more thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art.

[0025] In the description of the present utility model, all connection relationships mentioned do not simply refer to direct connection of components, but rather refer to the formation of a more optimal connection structure by adding or reducing connection accessories according to specific implementation circumstances. Each technical feature in the present utility model can be interactively combined on the premise of not conflicting with each other.

[0026] In the description of the present utility model, unless otherwise clearly defined, terms such as "arrangement", "installation", and "connection" should be understood in a broad sense, and those skilled in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0027] In the description of the present utility model, it should be understood that with regard to orientation descriptions, such as the orientation or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", etc., are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0028] In the description of the present utility model, the meaning of "several" is one or more, the meaning of "multiple" is two or more, understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number.

[0029] The present application provides a spherical tank, which realizes heating of the stored material in the spherical tank by means of passing a heat exchange tube 120 through a flange cover 110 at the bottom, maintains the physical and chemical properties of the stored material, is convenient for installation and replacement, reduces production costs, and reduces energy consumption.

[0030] Referring to Figure 1 and Figure 2 , the spherical tank provided by the present application includes a spherical tank body 100, a flange cover 110, and at least one heat exchange tube 120. A manhole is provided at the bottom of the spherical tank body 100, the flange cover 110 is arranged on the manhole and can close the manhole. A storage space for accommodating the material is formed between the inner cavities of the flange cover 110 and the spherical tank body 100. When the stored material in the storage space is a liquid material, when the temperature drops, the liquid material is likely to crystallize and precipitate to the bottom of the storage space. The heat exchange tube 120 is passed through the flange cover 110, and the heat exchange tube 120 extends into the storage space. At the same time, both the inlet 221 and the outlet 222 of the heat exchange tube 120 extend outside the storage space.

[0031] In the spherical storage tank of the present application, the heat exchange tube 120 is arranged on the flange cover 110 located at the bottom, and both the inlet 221 and the outlet 222 of the heat exchange tube 120 extend outside the storage space, which facilitates the installation or replacement of the heat exchange tube 120 and also enables the staff to introduce a high-temperature heat exchange medium into the opening of the heat exchange tube 120. The high-temperature heat exchange medium exchanges heat with the material in the storage space through the heat exchange tube 120 and finally discharges from the outlet 222 of the heat exchange tube 120 to directly heat the crystal precipitation at the bottom of the storage space, which can maintain the physical and chemical properties of the liquid material, ensure that the stored material in the spherical storage tank body 100 can reach the required working temperature and storage temperature, reduce production costs, and at the same time reduce energy consumption.

[0032] The spherical storage tank body 100 is a pressure tank with a spherical outer surface, and the storage space inside can actually store materials in a liquid or gaseous state. A support 130 is provided on the outer peripheral wall of the spherical storage tank body 100 in the horizontal direction to ensure the stability of the spherical storage tank body 100. The flange cover 110 is arranged at the bottommost position of the spherical storage tank body 100 so that the heat exchange tube 120 can accurately heat the material with changing physical and chemical properties. The size of the manhole opened at the bottom of the spherical storage tank body 100 is adapted to the size of the flange cover 110 so that the flange cover 110 can close the manhole. In fact, the heat exchange tube 120 is fixed on the flange cover 110 to form an integral body, and the flange cover 110 can be detachably connected to the spherical storage tank body 100 by bolts. When the heat exchange tube 120 needs to be replaced, a part of the flange cover 110 can be directly disassembled and a flange cover 110 with a heat exchange tube 120 can be replaced, which facilitates the replacement and installation operations. A manhole is also provided at the top of the spherical storage tank body 100 to facilitate installation and maintenance. In fact, a temperature sensor is provided inside the spherical storage tank body 100, and the staff can monitor the temperature of the material in the storage space in real time, and then can timely introduce a heat exchange medium with a suitable temperature into the heat exchange tube 120.

[0033] Combined Figure 2As shown in the figure, a first through-hole 231 and a second through-hole 232 are provided on the flange cover 110. The heat exchange tube 120 has one, and the heat exchange tube 120 penetrates into the first through-hole 231 and passes out from the second through-hole 232. Further, first welding grooves 410 are provided at both axial ends of the flange cover 110 corresponding to the first through-hole 231. The inner diameter of the first welding groove 410 is larger than the inner diameter of the first through-hole 231, and the inner diameter of the first welding groove 410 gradually decreases in the direction close to the first through-hole 231, presenting a retracted structure. Workers can fill solder into the first welding groove 410 to reduce welding beads. Second welding grooves are provided at both axial ends of the flange cover 110 corresponding to the second through-hole 232. The inner diameter of the second welding groove is larger than the inner diameter of the second through-hole 232, and the inner diameter of the second welding groove gradually decreases in the direction close to the second through-hole 232, also presenting a retracted structure. Workers can fill solder into the second welding groove to reduce welding beads. Through the arrangement of the first welding groove 410 and the second welding groove, it is convenient to weld the heat exchange tube on the flange cover 100, and further enables the heat exchange tube 120 and the flange cover 100 to be fixed to each other to form an integral body.

[0034] Moreover, the flange cover 110 includes a cylinder body 211 and a cover body 212. The cylinder body 211 extends axially in the up and down direction. The space enclosed inside the cylinder body 211 and the inner cavity of the spherical tank body 100 enclose a storage space. The cylinder body 211 has a top opening and a bottom opening. The top end of the cylinder body can be fixed to the spherical tank body 100 by welding. The cylinder body 211 can also be detachably connected to the spherical tank body 100 by bolts, etc. The top opening of the cylinder body 211 communicates with the manhole.

[0035] The cover body 212 is detachably connected to the bottom edge of the cylinder body 211, and the cover body 212 can cover or open the bottom opening of the cylinder body 211, and thus can open or close the manhole, facilitating workers to perform maintenance on the spherical tank body 100. At the same time, the cover body 212 can be detached from the cylinder body 211, facilitating the overall replacement of the cover body 212 and the heat exchange tube 120.

[0036] In this embodiment, one side of the cover body 212 is rotatably connected to the cylinder body 211 through a rotating shaft 213, and the other side of the cover body 212 is connected to the bottom edge of the cylinder body 211 by bolts, facilitating the opening of the cover body 212. In addition, in some other embodiments, the peripheral side of the cover body 212 can be connected to the bottom edge of the cylinder body 211 by bolts. When it is necessary to open the bottom opening of the cylinder body 211, the bolts on the cover body 212 can be disassembled.

[0037] The heat exchange tube 120 is passed through the cover body 212. At the same time, the inlet 221 and the outlet 222 of the heat exchange tube 120 both pass through the cover body 212 and are located outside the storage space. The heat exchange tube 120 is passed through at the bottommost position of the entire flange cover 110, which is convenient for introducing a high-temperature heat exchange medium into the heat exchange tube 120. At the same time, it is ensured that the heat exchange tube 120 can heat the liquid material at the bottom of the storage space, further maintaining the physical and chemical properties of the liquid material. In fact, the inlet 221 and the outlet 222 of the heat exchange tube 120 can also pass through the cover body 212 or the cylinder body 211 arbitrarily.

[0038] Combined with Figure 5 , a handle 510 is provided on the cover body 212. The heat exchange tube 120 is located between the position where the handle 510 is rotatably connected to the cover body 212. The position of the heat exchange tube 120 is staggered from the position of the rotating shaft 213 and the handle 510 to avoid interference and is convenient for the staff to use. Correspondingly, if it is necessary to open the cover body 212 after installing the heat exchange tube 120, the limitation of the heat exchange tube 120 can be set inside the cylinder body 211 so that the heat exchange tube 120 can be flipped with the cover body 212 to open the cylinder body 211 and avoid interference.

[0039] Moreover, the position of the heat exchange tube 120 can extend into the spherical tank body 100, improving the heat exchange area and heating effect of the heat exchange tube 120 on the material in the storage space. Further, the heat exchange tube 120 is located below the lowest liquid level of the spherical tank body 100, ensuring that the heat exchange tube 120 is always below the liquid level of the liquid material and improving the heat exchange efficiency.

[0040] In addition, there can be two or more heat exchange tubes 120. Two or more heat exchange tubes 120 can be arranged at intervals side by side or staggered, etc. For example, two heat exchange tubes 120 are arranged in parallel, or two heat exchange tubes 120 are arranged in a crosswise staggered manner. Correspondingly, the number of the first through holes 231 and the number of the second through holes 232 both match the number of the heat exchange tubes 120 one by one.

[0041] In order to facilitate the connection of the external heat exchange medium circulation pipeline, flange plates 250 are provided on both the inlet 221 of the heat exchange tube 120 and the outlet 222 of the heat exchange tube 120. The pipelines are hermetically fixed by being connected to the flange plates 250 with screws. The flange plates 250 can be fixed on the heat exchange tube 120 by welding or other means.

[0042] Combined with Figure 2 and Figure 3In this embodiment, the heat exchange tube 120 is a U-shaped structure with the opening facing downward. The heat exchange tube 120 includes a medium inlet section 310, a heat exchange section 320 and a medium outlet section 330 that are connected at one time. The inlet 221 of the heat exchange section 320 is formed at the medium inlet section 310, and the outlet 222 of the heat exchange section 320 is formed at the medium outlet section 330. The medium inlet section 310 vertically passes through the first through hole 231 from the storage space, and the medium outlet section 330 vertically passes through the second through hole 232 from the storage space. The U-shaped heat exchange tube 120 can simultaneously pass the inlet 221 and the outlet 222 into the first through hole 231 and the second through hole 232 respectively, so that the heat exchange tube 120 is conveniently installed in alignment with the hole position on the cover body 212 through the medium inlet section 310 and the medium outlet section 330. The lengths of the medium inlet section 310 and the medium outlet section 330 of the present application are consistent. The heat exchange tube 120 can also be used as a standard part. Moreover, the heat exchange section 320 is in an arc shape, and the two ends of the heat exchange tube 120 are respectively connected to the medium inlet section 310 and the medium outlet section 330 in an arc shape, which can increase the heat exchange area between the heat exchange tube 120 and the stored material, improve the heat exchange efficiency, and reduce the impact of the heat exchange medium on the heat exchange tube 120.

[0043] In addition, the medium inlet section 310 and the medium outlet section 330 can also be arranged obliquely relative to the flange cover 110, and the heat exchange section 320 can be extended in a straight line, or extended in a spiral structure, or arranged in a coil structure, etc., to increase the heat exchange area. Generally speaking, the overall width of the heat exchange tube 120 needs to be smaller than the width of the flange cover 110. The overall width of the heat exchange tube 120 of the present application needs to be smaller than the width of the cover body 212, so that the cover body 212 can be smoothly installed on the cylinder 211, or the cover body 212 can be smoothly removed from the cylinder 211 to avoid interference. The material of the heat exchange tube 120 can be selected as stainless steel or carbon steel according to the characteristics of the material medium stored in the spherical tank.

[0044] Furthermore, the outer walls of the medium inlet section 310 and the medium outlet section 320 that are exposed outside the storage space are coated with a thermal insulation coating, which can provide thermal insulation for the heat exchange medium and improve the heat exchange efficiency with the stored materials.

[0045] Reference Figure 2 and Figure 4, the first through hole 231 and the second through hole 232 are provided in the cover body 212. The inner diameter of the first through hole 231 is adapted to the inner diameter of the medium inlet section 310 to ensure that the medium outlet section 330 can pass through and be welded to the first through hole 231. The inner diameter of the second through hole 232 is adapted to the inner diameter of the medium outlet section 330 to ensure that the medium outlet section 330 can pass through and be welded to the second through hole 232. Moreover, the first through hole 231 and the second through hole 232 are spaced apart so that the medium inlet section 310 and the medium outlet section 330 form a space, forming a supporting effect, enabling the heat exchange tube 120 to be more stably connected to the flange cover 110. In addition, the first through hole 231 and the second through hole 232 can also be provided on the cylinder body 211 so that the medium inlet section 310 and the medium outlet section 330 can be welded to the cylinder body 211.

[0046] Furthermore, two valves 240 are provided on the heat exchange tube 120. The two valves 240 are respectively arranged on the medium inlet section 310 and the medium outlet section 330, and the valves 240 are located outside the storage space, facilitating the staff to open or close the valves 240 for opening or closing the pipeline. The valves 240 in this application can be globe valves. One of the two valves 240 can be used as a spare to improve the service life. In addition, after introducing the high-temperature heat exchange medium into the heat exchange tube 120, the two valves 240 can also be locked to keep the high-temperature heat exchange medium stored in the heat exchange tube 120 for heat exchange. Further, the spherical tank of this application further includes a first connecting pipe, a delivery pump, a heat source device, and a second connecting pipe. The heat source device is used to heat the heat exchange medium. One end of the first connecting pipe is connected to the inlet 221 of the heat exchange tube 120, the other end of the first connecting pipe is connected to the first end of the delivery pump, the second end of the delivery pump is connected to the heat exchange medium outlet of the heat source device, one end of the second connecting pipe is connected to the outlet 222 of the heat exchange tube 120, and the other end of the second connecting pipe is connected to the heat exchange medium inlet 221 of the heat source device. When in use, the two valves 240 are opened, and the heat exchange medium heated by the heat source device flows through the heat exchange tube 120 under the pumping action of the delivery pump to exchange heat with the stored material. After heat exchange, it flows back to the heat source device through the second connecting pipe, forming continuous heating and recycling of the high-temperature heat exchange medium, and being able to more stably maintain the temperature of the material inside the storage space. In this embodiment, the heat source device can be a pipeline structure with an electric heating element and a heat exchange device outside, or a storage tank with an electric heating element inside. The heat exchange medium can be hot water or other liquid media with different freezing points and boiling points to correspondingly suit the temperature required for the stored material.

[0047] In addition, valve 240 can also be a solenoid valve, which can open or close the heat exchange tube 120 by electronic control, which is convenient and quick. The spherical tank can also include a controller, which is electrically connected to the temperature sensor, valve 240 and the heat source device. When the temperature of the stored material decreases, the valve 240 and the heat source device can be automatically opened to transport high-temperature heat exchange medium to the heat exchange tube 120. When the temperature of the stored material reaches the required temperature, the heat exchange medium in the heat exchange tube 120 is discharged and the valve 240 is closed.

[0048] Reference Figure 5 The medium inlet section 310 and the medium outlet section 330 are symmetrically distributed with the central axis of the cover body 212 as the center, so as to improve the heating uniformity of the stored materials in the spherical tank. In this embodiment, the spacing distribution direction of the medium inlet section 310 and the medium outlet section 330 is parallel to the extension direction of the rotating shaft 213. The handle 510 and the rotating shaft 213 are located on both sides of the center of the cover body 212, and the heat exchange tube 120 is located between the handle 510 and the rotating shaft 213 to reduce interference. In addition, the spacing distribution direction of the medium inlet section 310 and the medium outlet section 330 can also be perpendicular to or staggered from the extension direction of the rotating shaft 213.

[0049] Correspondingly, the steps of the spherical tank installation method are as follows: a first through hole 231 and a second through hole 232 are opened on the cover body 212 at intervals; the medium inlet section 310 is inserted into the first through hole 231 and welded to the cover body 212; the medium outlet section 330 is welded to the second through hole 232 on the cover body 212; the cover body 212 is installed on the cylinder 211; the cylinder 211 is installed on the bottom manhole of the spherical tank body 100, and the heat exchange section 320 of the heat exchange tube 120 is partially set in the storage space; the welding points of the spherical tank body 100, the heat exchange tube 120 and the flip cover are inspected for weld defects, wherein the weld defect inspection includes sequentially performing radiographic inspection, ultrasonic inspection re-inspection and magnetic particle inspection, and the detected weld defects are inspected. The defects are repaired by welding or removed by grinding until the inspection result of the weld defects is qualified; the welding points of the spherical tank body 100, the heat exchange tube 120 and the flip cover are subjected to a water pressure test, and the detected pressure leakage points are repaired by welding or removed by grinding until the inspection result of the water pressure test is qualified; the valve 240 is installed at the part where the medium inlet section 310 and the medium outlet section 330 pass through the storage space, and the flange 250 is welded at the inlet 221 and the outlet 222 of the heat exchange tube 120. By welding the heat exchange tube 120 to the cover body 212 in advance, the heat exchange tube 120 can be installed or removed along with the installation or removal of the cover body 212, and then installed on or removed from the spherical tank body, which is convenient for the installation and replacement of the heat exchange tube 120.

[0050] Those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and practicing the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include common general knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present application are pointed out by the appended claims.

Claims

1. A spherical tank, characterized in that: include: The spherical tank body has a manhole at the bottom; A flange cover is arranged on the manhole and can close the manhole, and a storage space for accommodating materials is formed between the flange cover and the spherical tank body; At least one heat exchange tube is disposed on the flange cover and extends into the storage space, and an inlet and an outlet of the heat exchange tube are both located outside the storage space.

2. The spherical tank according to claim 1, characterized in that: The flange cover is provided with at least one first through hole and at least one second through hole; The heat exchange tube comprises a medium inlet section, a heat exchange section and a medium outlet section which are connected in sequence, the inlet of the heat exchange tube is located on the medium inlet section, the outlet of the heat exchange tube is located on the medium outlet section, the heat exchange section is located in the storage space, the medium inlet section passes through the first through hole from one end of the heat exchange section, and the medium outlet section passes through the second through hole from the other end of the heat exchange section.

3. The spherical tank according to claim 2, characterized in that: One end of the heat exchange section is connected to the medium inlet section in an arc shape, and the other end is connected to the medium outlet section in an arc shape; The shape of the heat exchange section is arc-shaped; The medium inlet section and the medium outlet section are both perpendicular to the flange cover; Flanges are provided on the inlet and outlet of the heat exchange tube.

4. The spherical tank according to claim 2, characterized in that: A valve is provided on at least one of the medium inlet section and the medium outlet section; The valve is located outside the spherical tank body; The valve is provided on both the medium inlet section and the medium outlet section.

5. The spherical tank according to claim 2, characterized in that: A first heat-insulating layer is provided on the portion of the medium inlet section located outside the storage space; A second heat-insulating layer is provided on the portion of the medium outlet section located outside the storage space.

6. The spherical tank according to claim 2, characterized in that: The first through hole and the second through hole are arranged at intervals; The flange cover is provided with first welding grooves at two axial ends corresponding to the first through hole, and the inner diameter of the first welding groove is larger than the inner diameter of the first through hole; The flange cover is provided with second welding grooves at two axial ends corresponding to the second through hole, and the inner diameter of the second welding groove is larger than the inner diameter of the second through hole.

7. The spherical tank according to claim 6, characterized in that: The inner diameter of the first welding groove gradually decreases toward the first through hole; The inner diameter of the second welding groove gradually decreases toward the second through hole.

8. The spherical tank according to claim 2 or 3, characterized in that: The flange cover comprises a cylinder and a cover, the top opening of the cylinder is sleeved on the manhole, the cylinder and the spherical tank body form the storage space, the cover is detachably connected to the bottom edge of the cylinder, the cover is configured to cover or open the bottom opening of the cylinder, and the heat exchange tube is passed through the cover; The medium inlet section and the medium outlet section are distributed in the center span of the cover body.

9. The spherical tank according to claim 8, characterized in that: One side of the cover is rotatably connected to the cylinder, and the other side is connected to the bottom edge of the cylinder by bolts; a handle is provided on the cover, and the heat exchange tube is located between the handle and the rotatable connection position of the cover; or The peripheral side of the cover body is connected to the bottom edge of the cylinder body by bolts; the heat exchange tube extends into the spherical tank body, and the heat exchange tube is located below the lowest liquid level of the spherical tank body.

10. The spherical tank according to claim 1, characterized in that: The spherical tank also includes a first connecting pipe, a delivery pump, a heat source device and a second connecting pipe. The heat source device is used to heat the heat exchange medium. One end of the first connecting pipe is connected to the inlet of the heat exchange pipe, the other end of the first connecting pipe is connected to the first end of the delivery pump, the second end of the delivery pump is connected to the heat exchange medium outlet of the heat source device, one end of the second connecting pipe is connected to the outlet of the heat exchange pipe, and the other end of the second connecting pipe is connected to the heat exchange medium inlet of the heat source device.

Images