Efficient pressurized jet type double rifling pipes and efficient cavity heat exchanger

Abstract

The utility model discloses an efficient pressurized jet type double rifling pipe and an efficient cavity heat exchanger, the outer circumference of a pipe body is provided with a plurality of spiral grooves which are distributed in a spiral mode, the inner circumference of the double rifling pipe is provided with a plurality of spiral protruding edges which are distributed in a spiral mode, and the medium outflow end of the pipe body is connected with a corrugated joint. The medium outflow ends of the corrugated sections are connected with second connecting sections, the number of the corrugated sections is larger than one and smaller than four, and the minimum inner diameter of the corrugated sections is smaller than the inner diameter of the pipe body. The utility model has the beneficial effects that the medium outflow end is provided with more than one and less than four corrugated sections, when the medium flows to the corrugated sections at a high speed, due to the existence of the small diameters of the corrugated sections, the flow velocity of the medium is increased, and the original flow track of the medium is changed, so that the medium generates stronger turbulent flow in the corrugated sections; and therefore, the medium is sprayed out from the outlet of the second connecting section in a diffusion manner, the medium scouring area is increased, and the medium mixing efficiency in the mixing chamber is improved.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange, and in particular to a high-efficiency pressurized jet double-flush tube and a high-efficiency chamber heat exchanger. Background Technology

[0002] A heat exchanger, also known as a heat exchanger fluid exchanger, is a device that transfers some of the heat from a hot fluid to a cold fluid. It is widely used in chemical, petroleum, wastewater treatment, and HVAC industries, especially in chemical production where it functions as a heater, cooler, condenser, and evaporator. There are many types of heat exchangers. Classified by heat transfer principle, they include indirect heat exchangers, regenerative heat exchangers, fluid-connected indirect heat exchangers, and direct contact heat exchangers. Classified by structure, the most common are plate heat exchangers and shell-and-tube heat exchangers (also called tube-and-tube heat exchangers).

[0003] Plate heat exchangers are one of the most common types of heat exchangers, with a long history of industrial application. Their main structure is a box-like enclosure containing multiple sets of heat exchange plates and interlocking strips. Fluid media of different temperatures flow between the heat exchange plates, achieving heat exchange. To improve heat exchange efficiency, a number of transverse baffles are usually installed inside the enclosure. These baffles not only prevent short-circuiting between fluids of different temperatures and increase fluid velocity, but also force the fluid to flow through the plates multiple times along a predetermined path, significantly increasing turbulence. Although plate heat exchangers are widely used and dominate the market among all heat exchangers, they also have significant drawbacks: 1. Large size, requiring a large footprint; 2. Brazing is required to seal the connection between heat exchange plates, which is complex, costly, and prone to incomplete welding; 3. Narrow flow channels affect flow velocity, thus impacting heat exchange efficiency and resulting in low efficiency; 4. Poor outlet sealing, prone to leakage, requiring frequent replacement of rubber strips, leading to high maintenance costs; 5. Prone to clogging, unsuitable for fluids containing suspended solids; 6. Scaling is difficult to clean, resulting in high flow resistance.

[0004] After long-term research, the inventors designed a double-rocker pipe. During use, the medium flows tightly against the inner wall of the double-rocker pipe, creating a hollow space in the middle. The outer heat exchange medium also experiences turbulence under the influence of the double-rocker pipe, thus improving heat exchange efficiency. Its application in chamber heat exchangers has received unanimous praise from customers. However, during the research and upgrading of chamber heat exchangers, the inventors discovered that the medium mixing in the mixing chamber was not sufficient. Analysis revealed that the medium flowing from the double-rocker pipe mainly entered the mixing chamber in a columnar shape with a relatively high velocity, resulting in a short time in the mixing chamber. Therefore, the medium re-entered the double-rocker pipe before being fully mixed. To further improve the heat exchange efficiency of chamber heat exchangers, the inventors, after long-term research, designed a high-efficiency pressurized jet-type double-rocker pipe. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a high-efficiency pressurized jet type double rifled tube.

[0006] The purpose of this utility model is achieved through the following technical solution: a high-efficiency pressurized jet-type double-rocker conduit, comprising a conduit body, the outer circumference of which has multiple spirally distributed spiral grooves, the spiral grooves being smoothly connected to the outer wall of the double-rocker conduit, the inner circumference of which has multiple spirally distributed spiral ridges, the spiral ridges being smoothly connected to the inner wall of the double-rocker conduit, the medium inflow end of the conduit body being connected to a first connecting section, the medium outflow end of the conduit body being connected to a corrugated section, the medium outflow end of the corrugated section being connected to a second connecting section, the number of corrugated sections being greater than 1 and less than 4, and the minimum inner diameter of the corrugated section being smaller than the inner diameter of the conduit body.

[0007] Optionally, the number of corrugated sections is 2.5.

[0008] Optionally, the minimum diameter of the corrugated joint is 5-8 mm smaller than the inner diameter of the pipe body.

[0009] Optionally, the lead of the spiral groove and the lead of the spiral ridge have the same direction of rotation, and the starting point of the spiral groove corresponds to the starting point of the spiral ridge.

[0010] Optionally, the outer diameters of the first connecting section, the pipe body, and the second connecting section are the same, and the maximum outer diameter of the corrugated joint is the same as the diameter of the pipe body.

[0011] A high-efficiency chamber heat exchanger includes a heat exchange shell, a front end cap, a rear end cap, and a tube sheet. Tube sheets are installed at both ends of the heat exchange shell. The front end cap and the rear end cap are installed on corresponding tube sheets. A mixing chamber is provided inside the front end cap and the rear end cap. It also includes a high-efficiency pressurized jet-type double-rifle conduit. A first connecting section and a second connecting section are installed on corresponding tube sheets, and the first connecting section and the second connecting section are respectively connected to the corresponding mixing chamber.

[0012] Optionally, the tube sheet is provided with several mounting through holes, and several limiting grooves are provided on the wall of the mounting through holes. Both ends of the double-rocker tube are provided with limiting protrusions that match the limiting grooves. Both ends of the double-rocker tube are installed in the corresponding mounting through holes, and the limiting protrusions are locked in the corresponding limiting grooves.

[0013] Optionally, the mounting through hole is a stepped through hole, the limiting groove is located on the small hole wall of the stepped through hole, and both ends of the double-rifle conduit are also provided with radially outward bending parts, which are located in the large hole of the stepped through hole.

[0014] Optionally, an annular groove is provided on the mounting surface of the tube sheet, and a limit ring is provided on the end face of the front end and the rear end. The limit ring is locked in the corresponding annular groove, and a sealing gasket is provided between the limit ring and the annular groove.

[0015] This invention has the following advantages: The double-rifle conduit of this invention has a corrugated section with more than 1 and less than 4 sections at its medium outlet. When the medium flows at high speed to the corrugated section, it first passes through the small diameter of the corrugated section, which further increases the flow velocity of the medium. Then it flows into the large diameter of the corrugated section, where the flow velocity will slow down briefly. Then it passes through the small diameter of the corrugated section again, where the flow velocity will increase again. Finally, it flows out through the outlet of the second connecting section. Due to the presence of the small diameter of the corrugated section, the flow velocity of the medium is increased, and the original flow trajectory of the medium is changed. This results in strong turbulence in the medium within the corrugated section. Furthermore, because the number of corrugated sections is small, and the length of the second connecting section is short, the flow path of the medium from the corrugated section to the outlet of the second connecting section is short, and the time spent in high-speed flow is also short. Therefore, the medium does not form a regular flow trajectory. Finally, it diffuses outward from the outlet of the second connecting section, thereby increasing the scouring area of ​​the medium and improving the mixing efficiency of the medium. Attached Figure Description

[0016] Figure 1 Schematic diagram of a double-faced concrete conduit Figure 1 ;

[0017] Figure 2 Schematic diagram of a double-faced concrete conduit Figure 2 ;

[0018] Figure 3 Cross-sectional view of a double-flush conduit Figure 1 ;

[0019] Figure 4 This is a schematic diagram of a high-efficiency chamber heat exchanger.

[0020] Figure 5 A schematic diagram showing the structure connecting the double-rifled conduit to the mixing chamber;

[0021] In the figure, 1-pipe body, 2-first connecting section, 3-second connecting section, 4-corrugated joint, 5-spiral groove, 6-spiral ridge, 7-limiting ring, 10-high-efficiency pressurized jet double-rocker pipe, 20-tube sheet, 30-front end cap, 40-rear end cap, 50-heat exchange shell, 60-mixing chamber. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0023] 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 claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] like Figure 4As shown, a high-efficiency chamber heat exchanger includes a heat exchange shell 50, a front end cap 30, a rear end cap 40, and a tube sheet 20. Tube sheets 20 are installed at both the front and rear ends of the heat exchange shell 50. The front end cap 30 and the rear end cap 40 are installed on their respective tube sheets 20. A mixing chamber 60 is provided inside both the front end cap 30 and the rear end cap 40. In this embodiment, the front end cap 30 and the rear end cap 40 are existing structures, and the installation between the front end cap 30, the rear end cap 40, and the tube sheet 20 is also existing. In this embodiment, an annular groove is provided on the mounting surface of the tube sheet 20, and limiting rings are provided on the end faces of the front end cap 30 and the rear end cap 40. The limiting rings are engaged in the corresponding annular grooves, and a sealing gasket (not shown in the figure) is provided between the limiting rings and the annular grooves. Further, as... Figure 5 As shown, the high-efficiency chamber heat exchanger also includes a high-efficiency pressurized jet double-welt pipe 10. The first connecting section 2 and the second connecting section 3 are both installed on the corresponding tube sheet 20, and the first connecting section 2 and the second connecting section 3 are respectively connected to the corresponding mixing chamber 60. The medium in the mixing chamber 60 of the front end cap 30 enters the high-efficiency pressurized jet double-welt pipe 10 through the first connecting section 2, and then enters the mixing chamber 60 of the rear end cap 40 through the second connecting section 3. After the medium is mixed in the mixing chamber 60, the mixed medium enters the high-efficiency pressurized jet double-welt pipe 10 through the first connecting section 2, and then enters the other mixing chamber 60 of the front end cap 30 through the second connecting section 3. Finally, the medium is discharged from the mixing chamber 60 at the bottom of the front end cap 30 or the rear end cap 40.

[0029] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, the high-efficiency booster jet type double-rocker conduit 10 includes a conduit body 1. The outer circumference of the conduit body 1 has multiple spirally distributed spiral grooves 5, which are smoothly connected to the outer wall of the double-rocker conduit 10. The inner circumference of the double-rocker conduit 10 has multiple spirally distributed spiral ridges 6, which are smoothly connected to the inner wall of the double-rocker conduit 10. In this embodiment, the lead of the spiral grooves 5 and the lead of the spiral ridges 6 are in the same direction, and the starting points of the spiral grooves 5 and the spiral ridges 6 correspond to each other. The medium flows through the conduit... When the medium flows at high speed inside the tube 1, a guide groove is formed between the two spiral protrusions 6. Under the guidance of the guide groove, the medium flows spirally and at high speed along the inner wall of the tube 1, thus ensuring that the medium always flows along the inner wall of the tube. Furthermore, under the high-speed flow, a hollow space is formed in the middle of the medium. In addition, the flow direction of the heat exchange medium inside the shell is opposite to the spiral direction of the spiral groove 5, which causes the heat exchange medium to form turbulence under the action of the spiral groove 5 during the flow process, thereby improving the heat exchange efficiency of the medium and the heat exchange medium.

[0030] In this embodiment, as Figure 1 , Figure 2and Figure 3 As shown, the medium inflow end of pipe body 1 is connected to a first connecting section 2, the medium outflow end of pipe body 1 is connected to a corrugated section 4, and the medium outflow end of corrugated section 4 is connected to a second connecting section 3. The number of sections in corrugated section 4 is greater than 1 and less than 4, and the minimum inner diameter of corrugated section 4 is smaller than the inner diameter of pipe body 1. When the medium flows at high speed in pipe body 1 to corrugated section 4, the medium first passes through the small diameter of corrugated section 4, which further increases the flow velocity of the medium. Then it flows into the large diameter of corrugated section 4, where the flow velocity will slow down briefly. Then it passes through the small diameter of corrugated section 4 again, where the flow velocity will increase again. Finally, it flows out through the outlet of the second connecting section 3. Due to the presence of the small diameter of corrugated section 4, the flow velocity of the medium is increased, and the original flow velocity of the medium is changed. The flow path is such that the medium generates strong turbulence within the corrugated section 4. Furthermore, because the number of sections in the corrugated section 4 is relatively small, not exceeding four, and the length of the second connecting section 3 is also relatively short (generally not exceeding the thickness of the tube sheet 20), the flow path of the medium from the corrugated section 4 to the outlet of the second connecting section 3 is short, and the time spent in high-speed flow is also short. Therefore, the medium does not form a regular flow path and is finally diffused outwards from the outlet of the second connecting section 3, thereby increasing the scouring surface of the medium, improving the mixing efficiency, and making the temperature of the medium re-entering the double-flush tube 10 more uniform, thus improving the heat exchange effect and achieving high-efficiency heat exchange.

[0031] In this embodiment, to achieve diffused spraying of the medium, the number of corrugated sections 4 should not be excessive. If the number of corrugated sections 4 exceeds four, a relatively stable flow trajectory will form within the corrugated sections 4. At this point, a pipe-like structure smaller than the inner diameter of the pipe body 1 will form at the corrugated section 4, resulting in significant resistance and affecting the flow of the medium within the pipe body 1. Furthermore, with too many corrugated sections 4, scaling is prone to occur at the corrugated sections 4. Over long-term use, the flow rate of the corrugated sections 4 gradually decreases, also generating significant resistance. Therefore, in this embodiment, preferably, the number of corrugated sections 4 is 2.5. After the medium flows into the corrugated section 4 at high speed, due to the short stroke of the corrugated section 4, the high-speed medium will not form a regular flow trajectory. Moreover, under the action of the small diameter of the corrugated section 4, the high-speed medium generates turbulence. The turbulent high-speed medium can continuously scour the inner wall of the corrugated section 4, thereby making it difficult for scale to form on the inner wall of the corrugated section 4, thus ensuring the reliability of the double-rifled conduit 10. Furthermore, the minimum diameter of the corrugated section 4 is 5-8 mm smaller than the inner diameter of the pipe body 1.

[0032] In this embodiment, as Figure 1 , Figure 2 and Figure 3As shown, the outer diameters of the first connecting section 2, the tube body 1, and the second connecting section 3 are the same, and the maximum outer diameter of the corrugated section 4 is the same as the diameter of the tube body 1. In traditional corrugated pipes, the small diameter determines the flow rate of the medium. In heat exchangers, corrugated pipes are used mainly because they can adapt well to thermal expansion and contraction. In this embodiment, the number of corrugated sections 4 is relatively short, and after the medium flows at high speed in the tube body 1, a hollow space is formed in the middle of the medium. Therefore, the setting of corrugated section 4 will not affect the flow of the medium. Moreover, the corrugated section 4 can be made by rolling during manufacturing, so the outer diameter of the tube body 1 does not need to be machined, thereby reducing production costs.

[0033] In this embodiment, as Figure 5 As shown, the installation of the double-rocker conduit 10 and the tube sheet 20 is prior art. In this embodiment, the double-rocker conduit 10 and the tube sheet 20 are selected using the following connection method: the tube sheet 20 has several mounting through holes, and several limiting grooves are formed on the wall of the mounting through holes. The two ends of the double-rocker conduit 10 are provided with limiting protrusions 7 that match the limiting grooves. The two ends of the double-rocker conduit 10 are installed in the corresponding mounting through holes, and the limiting protrusions 7 are engaged in the corresponding limiting grooves. Furthermore, the mounting through holes are stepped through holes, and the limiting grooves are located on the small hole wall of the stepped through hole. The two ends of the double-rocker conduit 10 are also provided with radially outwardly bent portions (not shown in the figure), which are located in the large hole of the stepped through hole. After the double-rocker conduit 10 is manufactured in the factory, the diameter of its two ends is the same as the diameter of its middle portion, while the mounting on the tube sheet 20... The through-hole matches the diameter of the middle pipe. Then, the two ends of the double-rocker conduit 10 are respectively inserted into the mounting through-holes of the corresponding tube sheet 20. Then, an expansion compression device is used to compress the two ends of the double-rocker conduit 10 to the corresponding tube sheet 20. During the expansion compression process, since the mounting through-hole has a limiting groove, the two ends of the double-rocker conduit 10 form a limiting protrusion 7 through expansion compression. The limiting protrusion 7 is stuck in the corresponding limiting groove, thereby fixing the double-rocker conduit 10 axially and ensuring the reliability of the double-rocker conduit 10. Furthermore, after expansion compression, the several limiting grooves and several limiting protrusions 7 achieve a tight fit. Moreover, the several limiting grooves and several limiting protrusions 7 form a labyrinth seal. Therefore, there is no need to weld the double-rocker conduit 10 to the tube sheet 20, which makes the double-rocker conduit 10 easy to disassemble and assemble.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-efficiency pressurized jet-type double-rocker conduit, characterized in that: The device includes a tube body with multiple spirally distributed grooves on its outer circumference, the spiral grooves being smoothly connected to the outer wall of the double-flush conduit. The double-flush conduit also has multiple spirally distributed convex ridges on its inner circumference, the convex ridges being smoothly connected to the inner wall of the double-flush conduit. A first connecting section is connected to the medium inflow end of the tube body, a corrugated section is connected to the medium outflow end of the tube body, and a second connecting section is connected to the medium outflow end of the corrugated section. The number of corrugated sections is greater than 1 and less than 4, and the minimum inner diameter of the corrugated section is smaller than the inner diameter of the tube body.

2. The high-efficiency booster jet type dual-rocker conduit according to claim 1, characterized in that: The number of corrugated sections is 2 and a half.

3. The high-efficiency booster jet type dual-rifle conduit according to claim 2, characterized in that: The minimum diameter of the corrugated joint is 5-8 mm smaller than the inner diameter of the tube body.

4. The high-efficiency booster jet type dual-rocker conduit according to any one of claims 1 to 3, characterized in that: The lead of the spiral groove and the lead of the spiral ridge have the same direction of rotation, and the starting point of the spiral groove corresponds to the starting point of the spiral ridge.

5. The high-efficiency booster jet type dual-rocker conduit according to claim 4, characterized in that: The first connecting section, the pipe body, and the second connecting section have the same outer diameter, and the maximum outer diameter of the corrugated joint is the same as the diameter of the pipe body.

6. A high-efficiency chamber heat exchanger, comprising a heat exchange shell, a front end cap, a rear end cap, and a tube sheet, wherein tube sheets are installed at both ends of the heat exchange shell, the front end cap and the rear end cap are installed on corresponding tube sheets, and a mixing chamber is provided inside both the front end cap and the rear end cap, characterized in that: It also includes the high-efficiency pressurized jet-type dual-rifle conduit as described in any one of claims 1 to 5, wherein the first connecting section and the second connecting section are both installed on the corresponding tube sheet, and the first connecting section and the second connecting section are respectively connected to the corresponding mixing chamber.

7. The high-efficiency chamber heat exchanger according to claim 6, characterized in that: The tube sheet has several mounting through holes, and the walls of the mounting through holes have several limiting grooves. Both ends of the double-bolt tube are provided with limiting protrusions that match the limiting grooves. Both ends of the double-bolt tube are installed in the corresponding mounting through holes, and the limiting protrusions are engaged in the corresponding limiting grooves.

8. The high-efficiency chamber heat exchanger according to claim 7, characterized in that: The mounting through hole is a stepped through hole, the limiting groove is located on the small hole wall of the stepped through hole, and both ends of the double-rifle conduit are also provided with radially outward bending parts, the bending parts being located inside the large hole of the stepped through hole.

9. The high-efficiency chamber heat exchanger according to claim 8, characterized in that: An annular groove is provided on the mounting surface of the tube sheet, and a limiting ring is provided on the end face of the front end and the rear end. The limiting ring is locked in the corresponding annular groove, and a sealing gasket is provided between the limiting ring and the annular groove.

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