Multi-stage cooler for compressed air

Abstract

The utility model relates to a cooling device, and provides a multi-stage cooler for compressed air, which comprises a shell, an air inlet component arranged at one end of the shell, an exhaust component arranged at the other end of the shell, a first pipeline component arranged in the shell, a second pipeline component arranged in the shell and a circulating water component, the first pipeline assembly comprises a spiral pipe, the air inlet assembly is provided with an air inlet nozzle connected with the spiral pipe, and the air exhaust assembly is provided with an air exhaust nozzle connected with the spiral pipe; the second pipeline assembly comprises a plurality of low-pressure air pipes arranged in the spiral pipe, the air inlet assembly is provided with an air inlet cover connected with the low-pressure air pipes, and the air exhaust assembly is provided with an air exhaust cover connected with the low-pressure air pipes. The multi-stage cooler for the compressed air can efficiently and simultaneously cool air with different air pressures in the air compression process.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling devices, in particular to a multi-stage cooler for compressed gas. Background Art

[0002] Compressed air is air that is compressed by external force. Air is compressible. Air that has been compressed by an air compressor to reduce its volume and increase its pressure is called compressed air. Compressed air is a very common and important power source, which is used in all aspects of industrial production.

[0003] In the process of preparing compressed gas, a compressor is usually used to compress the atmospheric pressure gas, and some application scenarios require the gas to have a very high pressure. Therefore, if a compressor is used for compression once, it is not only difficult to meet the air pressure requirements, but also the requirements and burden on the compressor are very large. Therefore, a multi-stage compression method can also be adopted, that is, the gas is compressed in steps and pressurized step by step. However, during the compression process, due to the increase in air pressure, the temperature of the gas will also increase accordingly, and the high-temperature gas is also an unknown burden on the compressor itself. Therefore, the gas is usually cooled after each stage of compression, which requires the setting of multiple cooling systems, which not only increases the production cost, but also increases the equipment failure rate and increases the maintenance cost. Therefore, a more efficient and low-cost cooling device for gas during the compression process can be designed. Utility Model Content

[0004] The utility model aims to provide a multi-stage cooler for compressed gas, which can efficiently cool gases with different pressures during the gas compression process at the same time.

[0005] The embodiment of the utility model is realized through the following technical scheme: the multi-stage cooler for compressed gas of the utility model comprises a shell, an air intake assembly arranged at one end of the shell, an exhaust assembly arranged at the other end of the shell, a first pipe assembly arranged in the shell, a second pipe assembly arranged in the shell, and a circulating water assembly; the first pipe assembly comprises a spiral tube, the air intake assembly is provided with an air intake nozzle connected to the spiral tube, and the exhaust assembly is provided with an exhaust nozzle connected to the spiral tube; the second pipe assembly comprises a plurality of low-pressure air pipes arranged in the spiral tube, the air intake assembly is provided with an air intake hood connected to the low-pressure air pipe, and the exhaust assembly is provided with an exhaust hood connected to the low-pressure air pipe.

[0006] Furthermore, a pair of the spiral tubes is provided, and the pair of the spiral tubes is arranged in a double helix structure.

[0007] Furthermore, the first pipeline assembly also includes a plurality of limit blocks arranged between the inner wall of the shell and the spiral tube, and a slot is provided on a side of the limit block close to the spiral tube, and the spiral tube is clamped in the slot; the side of the limit block away from the slot is connected to the shell.

[0008] Furthermore, the second pipe assembly also includes a pair of sealing plates respectively arranged at both ends of the low-pressure air pipe; the two ends of the low-pressure air pipe are respectively arranged through the sealing plates; the air intake hood and the exhaust hood are both covered on the sealing plates.

[0009] Furthermore, the second pipe assembly also includes a plurality of fixing plates arranged between a pair of the sealing plates, and connecting rods for connecting the plurality of fixing plates; the low-pressure air pipe is arranged through the fixing plates; and the plurality of fixing plates are arranged in an S-shaped staggered manner along the length direction of the low-pressure air pipe.

[0010] Furthermore, the air intake hood is connected to an air intake pipe, the exhaust hood is connected to an exhaust pipe, a first baffle is provided inside the air intake hood, and a second baffle is provided inside the exhaust hood; the first baffle and the second baffle are both in contact with the sealing plate; the air intake pipe and the exhaust pipe are respectively provided on opposite sides of the shell.

[0011] Furthermore, the first baffle plate and the second baffle plate are parallel to each other, the first baffle plate is arranged close to the air intake pipe, and the second baffle plate is arranged close to the exhaust pipe.

[0012] Furthermore, the circulating water assembly includes a sleeve arranged between the spiral tube and the low-pressure air pipe, a liquid inlet arranged at one end of the sleeve, a liquid discharge port arranged on the side wall of the sleeve at one end away from the liquid inlet, a liquid discharge pipe arranged on the side wall of the shell, and a circulating water supply device connected to both the liquid inlet and the liquid discharge pipe.

[0013] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects: the multi-stage cooler for compressed gas of the utility model, when in use, passes the compressed low-pressure (greater than normal pressure, low pressure relative to high-pressure gas) gas into the low-pressure air pipe, and cools it inside the shell and under the action of the circulating water component, and the cooled low-pressure gas discharged from the shell is sent to the compressor for compression, and after being compressed into high pressure, it is sent to the spiral tube, and is cooled again under the action of the circulating water component inside the shell and then discharged, so that multi-stage compressed gas with different air pressures can be cooled in the same shell, which can significantly improve the cooling efficiency, reduce the number of cooling devices, and simultaneously convey low-pressure gas through multiple low-pressure air pipes, which can increase the conveying flow rate of low-pressure gas, increase the contact area between gas and coolant, and improve the cooling efficiency. The high-pressure gas is conveyed through the spiral tube, which can well maintain the pressure of the gas, and increase the contact area between high-pressure gas and coolant, thereby ensuring the cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 A schematic diagram of the structure of a multi-stage cooler for compressed gas provided in an embodiment of the utility model;

[0016] Figure 2 A schematic diagram of the internal structure of a multi-stage cooler for compressed gas provided in an embodiment of the utility model;

[0017] Figure 3 A schematic structural diagram of a multi-stage cooler for compressed gas provided by an embodiment of the utility model after partial expansion from one perspective;

[0018] Figure 4 A schematic structural diagram of a multi-stage cooler for compressed gas provided by an embodiment of the utility model after partial expansion from two perspectives;

[0019] Figure 5 A schematic diagram of the structure inside the housing provided by an embodiment of the utility model;

[0020] Figure 6 A schematic diagram of the structure of the limit block part provided in an embodiment of the utility model;

[0021] Figure 7 A schematic diagram of the structure of the sleeve part provided in an embodiment of the utility model;

[0022] Figure 8 A structural schematic diagram of a fixing plate provided by an embodiment of the utility model from one perspective;

[0023] Fig. 9 A schematic structural diagram of a fixing plate from two viewing angles provided in an embodiment of the utility model.

[0024] Icons: 11-shell, 12-drain pipe, 21-inlet hood, 22-inlet pipe, 23-first baffle, 24-exhaust hood, 25-exhaust pipe, 26-second baffle, 31-spiral tube, 32-inlet nozzle, 33-exhaust nozzle, 34-limiting block, 35-slot, 41-sealing plate, 42-low-pressure air pipe, 43-fixing plate, 44-connecting rod, 45-sleeve, 46-liquid inlet, 47-drain port. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Example

[0031] The following is further described in conjunction with specific embodiments. Figure 1 -Attached Fig. 9 As shown, the multi-stage cooler for compressed gas in this embodiment includes a shell 11, an air intake assembly arranged at one end of the shell 11, an exhaust assembly arranged at the other end of the shell 11, a first pipe assembly arranged in the shell 11, a second pipe assembly arranged in the shell 11, and a circulating water assembly; the first pipe assembly includes a spiral tube 31, the air intake assembly is provided with an air intake nozzle 32 connected to the spiral tube 31, and the exhaust assembly is provided with an exhaust nozzle 33 connected to the spiral tube 31; the second pipe assembly includes a plurality of low-pressure air pipes 42 arranged in the spiral tube 31, the air intake assembly is provided with an air intake hood 21 connected to the low-pressure air pipe 42, and the exhaust assembly is provided with an exhaust hood 24 connected to the low-pressure air pipe 42. Specifically, when in use, the compressed low-pressure (greater than normal pressure, low pressure relative to high-pressure gas) gas is passed into the low-pressure air pipe 42, and is cooled inside the shell 11 and under the action of the circulating water component. The cooled low-pressure gas discharged from the shell 11 is then sent to the compressor for compression, and after being compressed into high pressure, it is sent to the spiral tube 31, and is cooled again under the action of the circulating water component inside the shell 11 and then discharged. In this way, compressed gases of multiple stages and different air pressures can be cooled in the same shell 11, which can significantly improve the cooling efficiency and reduce the number of cooling devices. Low-pressure gas can be simultaneously delivered through multiple low-pressure air pipes 42, which can increase the delivery flow rate of low-pressure gas, increase the contact area between gas and coolant, and improve cooling efficiency. High-pressure gas is delivered through the spiral tube 31, which can well maintain the pressure of the gas, increase the contact area between high-pressure gas and coolant, and ensure cooling efficiency.

[0032] In this embodiment, a pair of spiral tubes 31 are provided, and the pair of spiral tubes 31 are arranged in a double spiral structure. Specifically, this can increase the flow rate of high-pressure gas and improve the utilization rate of the cooling liquid.

[0033] The first pipe assembly in this embodiment also includes a plurality of stoppers 34 disposed between the inner wall of the housing 11 and the spiral tube 31. A clamping groove 35 is provided on the side of the stoppers 34 close to the spiral tube 31, and the spiral tube 31 is clamped in the clamping groove 35; the side of the stoppers 34 away from the clamping groove 35 is connected to the housing 11. Specifically, during installation, the spiral tube 31 is first placed in the housing 11, and then the stoppers 34 are attached to the side wall of the spiral tube 31 and welded, and finally the stoppers 34 are fixed to the housing 11 and sealed, so that the spiral tube 31 can be well supported.

[0034] The second pipe assembly in this embodiment further includes a pair of sealing plates 41 respectively arranged at both ends of the low-pressure air pipe 42, and the two ends of the low-pressure air pipe 42 are respectively arranged through the sealing plates 41; the air intake cover 21 and the exhaust cover 24 are both covered on the sealing plates 41. Specifically, since the pressure of the low-pressure gas is lower, the cross-sectional area required for ventilation is larger, and more low-pressure air pipes 42 are required. The gas can be better distributed to each low-pressure air pipe 42 through the air intake cover 21 and the exhaust cover 24. In addition, the sealing plate 41 can prevent the liquid in the housing 11 from entering the air intake cover 21 and the exhaust cover 24.

[0035] The second pipe assembly in this embodiment also includes a plurality of fixing plates 43 disposed between a pair of sealing plates 41, and a connecting rod 44 for connecting the plurality of fixing plates 43; the low-pressure air pipe 42 is disposed through the fixing plates 43; and the plurality of fixing plates 43 are arranged in an S-shaped staggered manner along the length direction of the low-pressure air pipe 42. Specifically, the fixing plates 43 have the function of supporting and fixing the low-pressure air pipe 42, and also play a role in guiding the coolant, so that the coolant can fully pass through each low-pressure air pipe 42 (such as the attached Figure 8-9 shown).

[0036] In this embodiment, the air intake hood 21 is connected to the air intake pipe 22, the air exhaust hood 24 is connected to the air exhaust pipe 25, a first baffle 23 is provided inside the air intake hood 21, and a second baffle 26 is provided inside the air exhaust hood 24; the first baffle 23 and the second baffle 26 are both in contact with the sealing plate 41; the air intake pipe 22 and the air exhaust pipe 25 are respectively provided on opposite sides of the housing 11. The first baffle 23 and the second baffle 26 are parallel to each other, the first baffle 23 is provided close to the air intake pipe 22, and the second baffle 26 is provided close to the air exhaust pipe 25. Specifically, the first baffle 23 and the second baffle 26 are provided to guide the low-pressure gas. If there are no first baffle 23 and the second baffle 26, the gas will preferentially enter the low-pressure gas pipe 42 closest to it after entering from the intake pipe 22. The gas flow rate in the low-pressure gas pipe 42 here is the largest, and the flow rate of the rest is relatively low. At this time, part of the gas will be fully cooled, while part of the gas will not be fully cooled due to the fast flow rate. After the first baffle 23 and the second baffle 26 are provided, the gas will directly enter the first baffle 23. The gas passes through the low-pressure air pipe 42 between the first and second air inlet pipes 22, and then enters the exhaust hood 24. Then, it passes through the exhaust hood 24 to enter another part of the low-pressure air pipe 42, and enters the air inlet hood 21 through this part of the low-pressure air pipe 42. Then, in the air inlet hood 21, it passes through the last part of the low-pressure air pipe 42 to enter the exhaust hood 24, and is discharged through the exhaust pipe 25. In this way, only the first baffle 23 and the second baffle 26 need to be set to fully increase the residence time of the gas in the shell 11 and make full use of each low-pressure air pipe 42.

[0037] The circulating water assembly in this embodiment includes a sleeve 45 disposed between the spiral tube 31 and the low-pressure air pipe 42, a liquid inlet 46 disposed at one end of the sleeve 45, a liquid discharge port 47 disposed on the side wall of the sleeve 45 at one end away from the liquid inlet 46, a liquid discharge pipe 12 disposed on the side wall of the shell 11, and a circulating water supply device connected to both the liquid inlet 46 and the liquid discharge pipe 12. Specifically, the external circulating water supply device pumps the coolant into the sleeve 45 through the liquid inlet 46, cools the low-pressure air pipe 42 in the sleeve 45, and then discharges it through the liquid discharge port 47, enters between the shell 11 and the sleeve 45, and cools the spiral tube 31, and finally discharges it from the liquid discharge pipe 12 on the shell 11 and flows back to the circulating water supply device.

[0038] In summary, the multi-stage cooler for compressed gas in this embodiment, when in use, passes the compressed low-pressure (greater than normal pressure, low pressure relative to high-pressure gas) gas into the low-pressure air pipe 42, and cools it inside the shell 11 and under the action of the circulating water component. The cooled low-pressure gas discharged from the shell 11 is then sent to the compressor for compression, and after being compressed into high pressure, it is sent to the spiral tube 31, and is discharged after being cooled again under the action of the circulating water component inside the shell 11. In this way, multi-stage compressed gas with different air pressures can be cooled in the same shell 11, which can significantly improve the cooling efficiency and reduce the number of cooling devices. The low-pressure gas can be simultaneously delivered through multiple low-pressure air pipes 42, which can increase the delivery flow rate of the low-pressure gas, increase the contact area between the gas and the coolant, and improve the cooling efficiency. The high-pressure gas is delivered through the spiral tube 31, which can well maintain the pressure of the gas, and increase the contact area between the high-pressure gas and the coolant, thereby ensuring the cooling efficiency.

[0039] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-stage cooler for compressed gas, characterized in that: It comprises a shell (11), an air intake assembly arranged at one end of the shell (11), an air exhaust assembly arranged at the other end of the shell (11), a first pipe assembly arranged in the shell (11), a second pipe assembly arranged in the shell (11), and a circulating water assembly; The first pipeline component comprises a spiral tube (31), the air intake component is provided with an air intake nozzle (32) connected to the spiral tube (31), and the air exhaust component is provided with an air exhaust nozzle (33) connected to the spiral tube (31); The second pipeline assembly comprises a plurality of low-pressure air pipes (42) arranged in the spiral pipe (31), the air intake assembly is provided with an air intake hood (21) connected to the low-pressure air pipes (42), and the exhaust assembly is provided with an exhaust hood (24) connected to the low-pressure air pipes (42).

2. The multi-stage cooler for compressed gas according to claim 1, characterized in that: A pair of the spiral tubes (31) are provided, and the pair of the spiral tubes (31) are arranged in a double helical structure.

3. The multi-stage cooler for compressed gas according to claim 1, characterized in that: The first pipe assembly further comprises a plurality of limit blocks (34) arranged between the inner wall of the shell (11) and the spiral tube (31); a clamping groove (35) is provided on a side of the limit block (34) close to the spiral tube (31), and the spiral tube (31) is clamped in the clamping groove (35); and a side of the limit block (34) away from the clamping groove (35) is connected to the shell (11).

4. The multi-stage cooler for compressed gas according to claim 1, characterized in that: The second pipeline assembly further comprises a pair of sealing plates (41) respectively arranged at both ends of the low-pressure air pipe (42); Both ends of the low-pressure air pipe (42) are respectively arranged through the sealing plate (41); the air intake cover (21) and the exhaust cover (24) are both covered on the sealing plate (41).

5. The multi-stage cooler for compressed gas according to claim 4, characterized in that: The second pipe assembly further comprises a plurality of fixing plates (43) arranged between a pair of the sealing plates (41), and a connecting rod (44) for connecting the plurality of fixing plates (43); the low-pressure air pipe (42) is arranged through the fixing plates (43); and the plurality of fixing plates (43) are arranged in an S-shaped staggered manner along the length direction of the low-pressure air pipe (42).

6. The multi-stage cooler for compressed gas according to claim 4, characterized in that: The air intake hood (21) is connected to an air intake pipe (22), the exhaust hood (24) is connected to an exhaust pipe (25), a first baffle (23) is provided inside the air intake hood (21), and a second baffle (26) is provided inside the exhaust hood (24); The first baffle plate (23) and the second baffle plate (26) are both in contact with the sealing plate (41); the air inlet pipe (22) and the exhaust pipe (25) are respectively arranged on two opposite sides of the shell (11).

7. The multi-stage cooler for compressed gas according to claim 6, characterized in that: The first baffle (23) and the second baffle (26) are parallel to each other; the first baffle (23) is arranged close to the air inlet pipe (22), and the second baffle (26) is arranged close to the exhaust pipe (25).

8. The multi-stage cooler for compressed gas according to claim 1, characterized in that: The circulating water assembly comprises a sleeve (45) arranged between the spiral tube (31) and the low-pressure air pipe (42), a liquid inlet (46) arranged at one end of the sleeve (45), a liquid discharge port (47) arranged on the side wall of the sleeve (45) at one end away from the liquid inlet (46), a liquid discharge pipe (12) arranged on the side wall of the shell (11), and a circulating water supply device connected to both the liquid inlet (46) and the liquid discharge pipe (12).

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