A cooling device

Abstract

The application discloses a cooling device, relates to the technical field of air cooling under mines, and can comprise a shell and a surrounding cooling pipe bundle, the shell is provided with a shell inlet and a shell outlet, the shell inlet is used for feeding a shell side medium to be cooled, and the shell outlet is used for discharging the shell side medium after being cooled; the surrounding cooling pipe bundle is arranged in the shell, and the surrounding cooling pipe bundle is used for feeding a tube side medium, so that the shell side medium in the shell is cooled. The cooling device can effectively improve the heat exchange effect and has a small floor area.

Description

Technical Field

[0001] This invention relates to the field of underground air cooling technology, and in particular to a cooling device. Background Technology

[0002] As mining progresses deeper, the temperature of the rocks underground increases. Due to the heating of airflow by the rocks, coupled with the heat released by operating machinery, ventilation technology alone is no longer sufficient to maintain underground climate conditions within acceptable limits. High temperature and high humidity have become a prominent problem restricting safe production in deep mines. At the same time, the high-temperature working environment causes discomfort, reducing labor productivity, affecting safety, and lowering work efficiency. Mechanical refrigeration and cooling technology for mines is being applied in an increasing number of mines.

[0003] Mining air cooling equipment is a key component of the refrigeration and cooling system for mine machinery. Its cooling effect and efficiency directly affect the technicality and economics of the mine cooling system. Air cooling devices used underground are mainly divided into direct contact air cooling devices and surface air cooling devices. Current problems include: First, in surface air cooling devices, air exchanges heat with chilled water from the refrigeration unit through the pipe wall to cool the air. Due to the limited space underground, the heat exchange area is limited, thus limiting the cooling capacity. Second, direct contact air cooling devices rely on direct contact between air and chilled water from the refrigeration unit for cooling. This type of device is bulky, and its cooling capacity is also limited by the confined space underground.

[0004] In summary, existing mine air handling technologies suffer from problems such as poor heat exchange efficiency and large land area requirements.

[0005] Currently, there is no systematic and comprehensive solution to the above problems. Patent CN203570341U discloses a mining air cooling and dehumidification heat exchanger. By partitioning different shells and arranging finned tube heat exchangers, the heat exchange effect is improved. However, this device has an excessively large cavity, a large footprint, and low space utilization. Moreover, condensate containing dust falls into the finned tube heat exchanger, resulting in excessive gas-liquid mixing and poor heat exchange effect.

[0006] In summary, how to design a cooling device with high heat exchange efficiency and small footprint is a key issue that needs to be addressed at present. Summary of the Invention

[0007] The purpose of this invention is to provide a cooling device that solves the problems existing in the prior art, effectively improves the heat exchange effect, and has a small footprint.

[0008] To achieve the above objectives, the present invention provides the following solution:

[0009] The present invention provides a cooling device, including a housing and a surrounding cooling tube bundle. The housing is provided with a housing inlet and a housing outlet. The housing inlet is used to introduce shell-side medium to be cooled, and the housing outlet is used to discharge the cooled shell-side medium. The surrounding cooling tube bundle is disposed inside the housing, and tube-side medium is introduced into the surrounding cooling tube bundle to cool the shell-side medium inside the housing.

[0010] Preferably, the shell-side medium is high-temperature air, and the tube-side medium is low-temperature CO2.

[0011] Preferably, the shell includes a cylindrical body, with an inlet cap and an outlet cap respectively provided at both ends of the cylindrical body. The inlet cap is provided with the shell inlet, and the outlet cap is provided with the shell outlet.

[0012] Preferably, the housing is further provided with a lifting ring, and the bottom of the housing is further provided with a bottom support; the housing is also provided with an observation cover to allow observation of the interior of the housing.

[0013] Preferably, the circumferential cooling tube bundle includes a spiral cooling tube, the inlet of which is located near the outlet of the housing, the outlet of which is located near the inlet of the housing, and a guide vane is also provided on the spiral cooling tube, the guide vane and the spiral cooling tube being nested together.

[0014] Preferably, the spiral cooling tube array comprises multiple spiral cooling tubes, with the inlet of all spiral cooling tubes connected to the inlet branch pipe and the outlet of all spiral cooling tubes connected to the outlet manifold pipe.

[0015] Preferably, the inlet branch pipe and the outlet manifold are each mounted on a support frame, and the support frame is installed inside the housing; the outer edge of the surrounding cooling tube bundle is also fixed by a fixing frame.

[0016] Preferably, the housing is further provided with a cleaning mechanism, which is capable of cleaning the inner wall of the housing and the surrounding cooling tube bundle.

[0017] Preferably, the cleaning device includes a cleaning pipe, which is axially disposed in the middle of the housing and passes through the surrounding cooling tube bundle, and the cleaning pipe is used to introduce cleaning fluid; the cleaning pipe is also provided with a plurality of nozzles, which are used to spray the cleaning fluid to clean the inner wall of the housing and the surrounding cooling tube bundle.

[0018] Preferably, the cleaning pipe is further provided with spiral fins, and the cleaning liquid, after being sprayed out by the nozzle, can flow along the spiral fins to form a swirling flow.

[0019] The present invention achieves the following beneficial technical effects compared to the prior art:

[0020] This invention employs a surrounding cooling tube bundle, which effectively increases the heat exchange area per unit volume and improves the heat exchange effect. Moreover, the surrounding cooling tube bundle is set inside the shell, which can fit tightly with the shell, resulting in a compact structure, saving space, improving space utilization, and achieving the characteristic of small footprint.

[0021] Furthermore, the present invention also includes a cleaning mechanism inside the housing, which can clean the inner wall of the housing and the surrounding cooling pipes, preventing dust accumulation and blockage, and reducing the difficulty of cleaning. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is an isometric view of the cooling device in an embodiment of the present invention;

[0024] Figure 2 This is a front sectional view of the cooling device in an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the surrounding cooling tube bundle in an embodiment of the present invention;

[0026] Figure 4 for Figure 3 A schematic diagram of direction A;

[0027] Figure 5 This is a schematic diagram of the cleaning mechanism in an embodiment of the present invention;

[0028] Explanation of reference numerals in the attached drawings: 1. Shell; 2. Circular cooling tube bundle; 3. Cleaning mechanism; 4. Observation cover; 5. Fastening bolt; 6. Outlet cover; 7. Water inlet pipe; 8. Connecting flange; 9. Inlet branch pipe; 10. Spiral cooling tube; 11. Guide vane; 12. Lifting ring; 13. Nozzle; 14. Spiral finned tube; 15. Outlet manifold; 16. Inlet cover; 17. Bottom support; 18. Cylinder; 19. Support frame; 20. Fixing frame. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] The purpose of this invention is to provide a cooling device that solves the problems existing in the prior art, effectively improves the heat exchange effect, and has a small footprint.

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Example 1

[0033] like Figures 1-5 As shown, this embodiment provides a cooling device, including a housing 1 and a surrounding cooling tube bundle 2. The housing 1 is provided with a housing inlet and a housing outlet. The housing inlet is used to introduce the shell-side medium to be cooled, and the housing outlet is used to discharge the cooled shell-side medium. The surrounding cooling tube bundle 2 is disposed inside the housing 1, and the outer edge of the surrounding cooling tube bundle 2 is tightly fitted to the inner wall of the housing 1. The surrounding cooling tube bundle 2 is used to introduce tube-side medium to cool the shell-side medium inside the housing 1. It should be further noted that in this embodiment, the surrounding cooling tube bundle 2 refers to a spiral surrounding cooling tube bundle.

[0034] The present invention adopts a surrounding cooling tube bundle 2, which effectively increases the heat exchange area per unit volume and improves the heat exchange effect; moreover, the surrounding cooling tube bundle 2 is set inside the shell 1, which can fit tightly with the shell 1, resulting in a compact structure, saving space, improving space utilization, and achieving the characteristic of small footprint.

[0035] In this embodiment, the shell-side medium and the tube-side medium are selected according to different working scenarios or needs, and can be liquid or gas. As a preferred embodiment, the cooling device in this embodiment can be used for cooling underground air. The shell-side medium is the high-temperature air in the mine, and the tube-side medium is preferably low-temperature CO2. Here, low temperature and high temperature are relative, that is, the temperature of the tube-side medium is lower than the temperature of the shell-side medium, so as to achieve cooling of the shell-side medium.

[0036] In this embodiment, the housing 1 includes a cylindrical body 18, with an inlet cap 16 and an outlet cap 6 respectively provided at both ends of the cylindrical body 18. The inlet cap 16 is provided with the housing inlet, and the outlet cap 6 is provided with the housing outlet. Preferably, the cylindrical body 18 is cylindrical, which further ensures a tight fit with the internal surrounding cooling tube bundle 2 and improves space utilization. Alternatively, other shapes of cylindrical bodies 18 can be selected according to work needs, such as polygonal prism cylindrical bodies.

[0037] In this embodiment, a lifting ring 12 is welded onto the housing 1 to facilitate hoisting of the housing 1; a bottom support 17 is also provided at the bottom of the housing 1 to support the housing 1; the lifting ring 12 and the bottom support 17 facilitate the use of the cooling device in complex downhole working conditions. An observation cover 4 is also provided on the housing 1 to allow observation of the interior of the housing 1. The observation cover 4 can be a transparent cover, allowing direct observation of the interior of the housing 1, or it can be an opaque cover, which can be removed to observe the interior of the housing 1. Furthermore, the observation cover 4 can be fixed to the housing 1 by fastening bolts 5.

[0038] In this embodiment, as Figures 2-4 As shown, the surrounding cooling tube bundle 2 includes a spiral cooling tube 10. The inlet of the spiral cooling tube 10 is located near the shell outlet, and the outlet of the spiral cooling tube 10 is located near the shell inlet. The tube-side medium flows within the spiral cooling tube 10 to cool the shell-side medium within the shell 1, extending the flow path and increasing the heat exchange area, thereby enhancing the heat exchange effect. A guide vane 11 is attached to the spiral cooling tube 10 (on the side near the shell inlet), which facilitates the fixation of the spiral cooling tube 10. The shape of the guide vane 11 matches the shape of the spiral cooling tube 10, forming a spiral guide vane. The guide vane 11 and the spiral cooling tube 10 are nested together. Both the spiral cooling tube 10 and the guide vane 11 are preferably made of copper. The guide vane 11 also increases the overall heat exchange area. Furthermore, the guide vane 11 can guide the shell-side medium, allowing for sufficient heat exchange and further improving the heat transfer effect.

[0039] In this embodiment, the spiral cooling pipe 10 and the guide vane 11 can also be made of other materials, such as aluminum or stainless steel, depending on the working requirements.

[0040] In this embodiment, the spiral cooling pipes 10 are arranged in multiple arrays, and the inlets of all the spiral cooling pipes 10 are connected to the inlet branch pipe 9, and the outlets of all the spiral cooling pipes 10 are connected to the outlet manifold 15; specifically, as shown... Figure 2 and Figure 3As shown, the inlet branch pipe 9 includes four branch pipes arranged in a cross shape and connected to each other by an annular pipe. Each branch pipe is connected to multiple spiral cooling pipes 10, all of which are axially arranged to form a circumferential cooling tube bundle 2. The structure of the outlet manifold 15 is the same as that of the inlet branch pipe 9. In this embodiment, a nested array of spiral cooling pipes 10 and guide vanes 11 is used to form a circumferential cooling tube bundle 2, which has a large contact area with the shell-side medium and facilitates secondary flow of the tube-side medium. The shell-side medium outside the tubes will generate vortices and detach near the tube wall, thereby enhancing local turbulence characteristics and achieving a stronger heat transfer effect.

[0041] In this embodiment, both the inlet branch pipe 9 and the outlet manifold 15 are connected to a connecting flange 8, which is connected to a rubber tube for introducing or discharging the pipe medium.

[0042] In this embodiment, the inlet branch pipe 9 and the outlet manifold 15 are each mounted on a support frame 19, which is installed inside the housing 1; the outer edge of the circumferential cooling tube bundle 2 is also fixed by a fixing frame 20 to prevent excessive vibration of the spiral cooling tube 10 and extend its service life.

[0043] In this embodiment, a cleaning mechanism 3 is also provided inside the housing 1. The cleaning mechanism 3 can clean the surrounding cooling tube bundle 2 and the inner wall of the housing 1 to remove dirt and sludge and prevent dust accumulation and blockage.

[0044] In this embodiment, as Figure 5 As shown, the cleaning device includes a cleaning pipe, which is axially positioned in the middle of the housing 1 and extends through the surrounding cooling tube bundle 2. A cleaning fluid is introduced into the cleaning pipe. Multiple nozzles 13 are also provided on the cleaning pipe to spray the cleaning fluid from the cleaning pipe, thereby cleaning the inner wall of the housing 1 and the surrounding cooling tube bundle 2. The cleaning fluid can be selected according to operational needs, such as water or a cleaning solution formed by adding detergent to water. In this embodiment, high-pressure water is preferred. The inlet of the cleaning pipe is connected to an external high-pressure water pipe via a connecting flange 8. High-pressure water is introduced from the inlet of the cleaning pipe, flushing the surrounding cooling tube bundle 2 from the inside out in a multi-directional and forceful manner. The operation is simple and effective.

[0045] In this embodiment, the cleaning tube is preferably a spiral finned tube 14, which is also provided with spiral fins. After the cleaning liquid is sprayed out by the nozzle 13, it can flow along the spiral fins to form a swirling flow, thereby further improving the cleaning effect.

[0046] In this embodiment, the cleaning pipe and the spiral fins are preferably made of steel, or copper or aluminum can also be selected; moreover, the cleaning pipe can be nested and welded in the middle of the support frame 19, which can more conveniently clean the scale and mud inside the cooling device.

[0047] The heat exchange principle of the cooling device in this embodiment is as follows:

[0048] Pipeline: such as Figure 1 , Figure 2 As shown, the tube-side medium is low-temperature CO2, which enters from the inlet branch pipe 9 through the external rubber tube and connecting flange 8. After heat exchange with the air inside the cylinder 18 through the surrounding cooling tube bundle 2, it flows into the outlet manifold 15 and then flows out at high temperature.

[0049] Shell side: such as Figure 1 , Figure 2 As shown, the shell-side medium is high-temperature air, which flows into the cylinder 18 through the inlet cover 16, exchanges heat with the surrounding cooling tube bundle 2, and then flows out at low temperature from the outlet cover 6.

[0050] Cleaning principle:

[0051] An external high-pressure water pipe is connected via the connecting flange 8, and water is introduced into the spiral finned tube 14. Water flows out through the nozzle 13 and swirls to flush the outer wall of the spiral cooling tube 10 and the guide vane 11, as well as the inner wall of the cylinder 18, to clean dirt and sludge.

[0052] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0053] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A cooling device, characterized by: The application relates to a shell and a surrounding cooling pipe bundle, wherein a shell inlet is arranged on the shell for feeding a shell side medium to be cooled, and a shell outlet is arranged on the shell for discharging the cooled shell side medium; the surrounding cooling pipe bundle is arranged in the shell, and a pipe side medium is fed into the surrounding cooling pipe bundle to cool the shell side medium in the shell. The shell comprises a cylinder body, and an inlet cover and an outlet cover are arranged at two ends of the cylinder body respectively; the shell inlet is arranged at the inlet cover, and the shell outlet is arranged at the outlet cover. The surrounding cooling pipe bundle comprises a spiral cooling pipe, the inlet of the spiral cooling pipe is arranged close to the shell outlet, the outlet of the spiral cooling pipe is arranged close to the shell inlet, and a guide vane is further arranged on the spiral cooling pipe; the guide vane and the spiral cooling pipe are nested with each other; the shape of the guide vane matches the shape of the spiral cooling pipe, and the guide vane is a spiral guide vane; the guide vane is arranged on one side of the spiral cooling pipe close to the shell inlet. A plurality of spiral cooling pipes are arranged in an array, the inlets of all the spiral cooling pipes are connected with an inlet shunt pipe, and the outlets of all the spiral cooling pipes are connected with an outlet bus pipe. A cleaning mechanism is further arranged in the shell, and the cleaning mechanism can clean the inner wall of the shell and the surrounding cooling pipe bundle; the cleaning mechanism comprises a cleaning pipe which is arranged in the middle of the shell in the axial direction, penetrates the surrounding cooling pipe bundle, and is used for feeding a cleaning liquid; a plurality of nozzles are further arranged on the cleaning pipe, the nozzles are used for spraying the cleaning liquid to clean the inner wall of the shell and the surrounding cooling pipe bundle; and a spiral fin is further arranged on the cleaning pipe, and the cleaning liquid can flow along the spiral fin to form a spiral flow after being sprayed out of the nozzles.

2. Cooling device according to claim 1, characterized in that The shell side medium is high-temperature air, and the pipe side medium is low-temperature CO2.

3. The cooling device of claim 1, wherein: A lifting ring is further arranged on the shell, a bottom support is further arranged at the bottom of the shell, an observation cover is further arranged on the shell to observe the inside of the shell.

4. The cooling device of claim 1, wherein: The inlet shunt pipe and the outlet bus pipe are each mounted on a support frame which is mounted in the shell; and the outer edge of the surrounding cooling pipe bundle is further fixed by a fixing frame.

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