Waste gas conveying pipeline and cold and heat exchange system

Abstract

The invention relates to the technical field of pipes, in particular to a waste gas conveying pipeline and a cold and heat exchange system.The cold and heat exchange system comprises the waste gas conveying pipeline and an anti-explosion mechanism, the anti-explosion mechanism is connected with an inner pipeline corresponding to the waste gas conveying pipeline, and the anti-explosion mechanism is used for conducting deflation treatment on gas, exceeding the preset maximum atmospheric pressure, in the inner pipeline; the problem of how to clean impurities in the pipeline is solved.

Description

Technical Field

[0001] The invention relates to the field of transportation technology, and in particular to an exhaust gas transportation pipeline and a cold and heat exchange system. Background Art

[0002] Chloroprene rubber is a homopolymer or copolymer of chloroprene obtained by homopolymerization or copolymerization of 2-chloro-1,3-butadiene as the main monomer; during the film-forming, dehydration and drying process of the emulsion after continuous emulsion polymerization or intermittent emulsion polymerization, a large amount of high-temperature and high-humidity waste gas will be generated; if the waste gas is directly discharged, it will inevitably cause heat loss; at this time, the heat generated above is collected in time by using a collection device for subsequent waste heat reuse; during the heat collection process, a pipeline is needed to transport the waste gas carrying heat; in the prior art, Disclosed are technologies related to pipes for transporting exhaust gas; for example, announcement number CN221762851U discloses an exhaust gas pipe, including: a main body assembly, the main body assembly includes a front side plate, an upper side plate arranged at the upper end of the rear side wall of the front side plate, a rear side plate arranged at the rear side wall of the upper side plate, a lower side plate arranged on the lower surface of the front side plate, a first protrusion arranged on the upper surface of the front side plate, a second protrusion arranged on the upper surface of the rear side plate, and a third protrusion arranged on the lower surface of the front side plate; a connecting assembly, the connecting assembly includes a first clamping frame arranged on the right side of the front side plate.

[0003] For another example, announcement number CN104482314A discloses an environmental protection equipment exhaust gas conveying pipe, including a pipe, one end of the pipe is an air inlet, and the other end is an air outlet. A condenser is provided at the air inlet of the pipe, the condenser is spirally arranged, and a filter net is provided between the inner walls of the condenser, the inner wall of the pipe is provided with several spiral grooves extending along the wind direction, and these grooves are evenly distributed around the pipe, and a heating pipe is provided on the inner wall of the air outlet of the pipe.

[0004] The above two prior arts (CN221762851U, CN104482314A) can both realize the transportation of waste gas carrying heat; however, the problem is that the above two prior arts do not disclose how to clean the impurities in the pipeline. Summary of the invention

[0005] In view of this, an object of the present invention is to provide an exhaust gas conveying pipeline and a cold and heat exchange system to solve the problem of how to clean the impurities in the pipeline.

[0006] In the first aspect, the present invention discloses an exhaust gas conveying pipeline, comprising at least one double-layer pipe, which is connected by an outer pipe sleeve and an inner pipe from the outside to the inside, and the inner pipe and the outer pipe sleeve of the double-layer pipe are both cavity structures; one side of the inner pipe and the outer pipe sleeve is connected through a hole, and the other side of the inner pipe and the outer pipe sleeve is connected through at least a single air supply pipe; a cleaning mechanism is arranged on the pipe wall of the inner pipe, and the cleaning mechanism is used to clean impurities in the inner pipe; the cleaning mechanism comprises at least a single sliding column, both ends of the sliding column are fixedly connected to the inner side of the inner pipe, and a scraper ring is slidably connected to the sliding column, and the scraper ring is in contact with and adapted to the inner pipe; the sliding column is connected to the scraper ring through a first elastic component; the scraper ring is connected to a driving unit, and the driving unit is used to drive the scraper ring to complete a sliding action on the sliding column and the surface of the inner pipe.

[0007] Optimally, an outlet end and an inlet end are formed on both sides of the inner pipe respectively, the inlet end of the inner pipe is adjacent to the hole, and the outlet end of the inner pipe is adjacent to the air supply pipe; multiple inner pipes are connected end to end in sequence and together constitute the entire exhaust gas delivery pipeline.

[0008] As a specific solution of the driving unit, the driving unit includes an electric telescopic rod, the electric telescopic rod is fixedly connected to the inner pipeline, and the telescopic shaft of the electric telescopic rod is fixedly connected to the scraper ring.

[0009] As a specific solution of the driving unit, the driving unit includes a pull rope, one end of the pull rope is fixedly connected to the scraper ring, and the other end of the pull rope movably passes through the inner pipeline and is fixedly connected to the annular plug body; the annular plug body is slidably connected to the guide column of the outer pipe sleeve, and the second elastic component is connected between the guide column and the annular plug body; the inner and outer walls of the annular plug body form a sliding fit with the outer pipe sleeve and the inner pipeline respectively; when the second elastic component is in a natural state, the first elastic component is in a stretched state; an exhaust fan is provided on the air supply pipe, and the exhaust fan is used to draw the hot air flow in the inner pipeline into the outer pipe sleeve.

[0010] Optimally, a flange is formed on the outer wall of the annular plug body, and a longitudinal groove is formed on the inner wall of the outer sleeve, and the longitudinal groove and the flange form a sliding connection.

[0011] In a second aspect, a heat exchange system includes an exhaust gas delivery pipeline, an explosion-proof mechanism connected to a corresponding internal pipeline, and the explosion-proof mechanism is used to release gas in the internal pipeline that exceeds a preset maximum pressure.

[0012] Specifically, the explosion-proof mechanism includes an exhaust pipe, which is connected to the inner pipeline in a through-type manner, and the cavity of the exhaust pipe is connected to the inner pipeline; a block is slidably connected in the cavity of the exhaust pipe, and the first through hole of the block is connected to the second through hole of the exhaust pipe; the block is connected to the exhaust pipe through a third elastic component; when the third elastic component is in a natural state, the first through hole and the second through hole are in a completely misaligned state, and the block blocks the exhaust pipe.

[0013] The beneficial effects of the present invention are: The present invention combines a double-layer pipe with a cleaning mechanism, which can not only utilize the residual heat of the hot air flow to insulate the waste gas conveying pipe itself, but also can clean the impurities in the pipe compared with the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the exhaust gas conveying pipeline.

[0015] Figure 2 Schematic diagram of the cross-section structure of a double-layer tube.

[0016] Figure 3 It is a schematic diagram of the three-dimensional structure of the cleaning mechanism.

[0017] Figure 4 It is a schematic diagram of the assembly structure of another embodiment of the drive unit.

[0018] Figure 5 It is a schematic diagram of the assembly structure of another embodiment of the drive unit.

[0019] Figure 6 This is a schematic diagram of the installation structure of the explosion-proof mechanism.

[0020] Figure 7 It is a schematic diagram of the three-dimensional structure of the explosion-proof mechanism.

[0021] Figure 8 This is a schematic diagram of the optimized explosion-proof mechanism assembly structure.

[0022] Fig. 9 This is a schematic diagram of the explosion-proof mechanism structure with two gear teeth.

[0023] In the figure, 1, inner pipeline; 2, outer sleeve; 3, hole; 4, air supply pipe; 5, sliding column; 6, boss; 7, scraper ring; 8, first elastic component; 9, pull rope; 10, guide column; 11, annular plug body; 12, second elastic component; 13, longitudinal groove; 14, exhaust fan; 15, exhaust pipe; 16, block; 17, first through hole; 18, second through hole; 19, third elastic component; 20, tooth plate; 21, transmission gear; 22, support rod; 23, annular toothed disc; 24, gear teeth; 25, rotating shaft; 26, impeller. DETAILED DESCRIPTION

[0024] In order to clearly understand the technical solution of the present application, an exhaust gas conveying pipeline and a heat exchange system provided by the present application will be described in detail below in combination with specific embodiments and drawings.

[0025] The terms used in the following embodiments are only for the purpose of describing specific embodiments, and are not intended to be used as limitations to the present application. As used in the specification and claims of the present application, the singular expressions "one", "a kind of", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear indication to the contrary in the context. It should also be understood that in the following embodiments of the present application, "at least one", "one or more" refer to one, two or more than two.

[0026] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. appearing in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0027] Embodiment 1: This embodiment provides an exhaust gas delivery pipeline, referring to Figure 1 , which shows the overall structure of the exhaust gas delivery pipeline. It can be seen from the figure that the exhaust gas delivery pipeline includes multiple double-layer pipes, further combined with Figure 2 The schematic diagram of the cut-away structure of the double-layer pipe shown in the figure, a single double-layer pipe specifically includes an inner pipe 1, the left and right sides of the inner pipe 1 are the outlet end and the inlet end respectively; multiple inner pipes 1 are connected end to end in sequence, and together constitute the entire exhaust gas conveying pipeline; an outer pipe sleeve 2 is sleeved on the outer wall of the inner pipe 1, and the inner cavity of the outer pipe sleeve 2 forms a sealed space with the outer wall of the inner pipe 1; a plurality of holes 3 are formed in a circular array on the right wall of the inner pipe 1, and the holes 3 connect the inner cavity of the inner pipe 1 with the inner cavity of the outer pipe sleeve 2 The left wall of the inner pipe 1 is connected with two air supply pipes 4, and the other end of the air supply pipe 4 is connected with the outer pipe sleeve 2. The present invention combines the inner pipe 1 with the outer pipe sleeve 2, the hole 3, and the air supply pipe 4, so that the hot air flow flowing in the inner pipe 1 can be introduced into the hole 3, the outer pipe sleeve 2, and the air supply pipe 4 in a split form, and finally flow back to the inner pipe 1. Therefore, when the exhaust gas delivery pipeline guides the hot air flow, the waste heat of the hot air flow can also be used to form a heat preservation effect on the outer wall of the inner pipe 1. Further combined Figure 3 The three-dimensional structural schematic diagram of the cleaning mechanism is shown in the figure. The exhaust gas conveying pipeline also includes a cleaning mechanism, which is installed on the inner side of the inner pipe 1 and is used to clean impurities in the inner pipe 1. The specific structure of the cleaning mechanism is as follows.

[0028] The specific solution is as follows: the cleaning mechanism includes a sliding column 5, and the two sliding columns 5 are fixedly connected to the top wall and the bottom wall on the inner side of the inner pipe 1 by welding using a boss 6. A scraper ring 7 is provided between the two sliding columns 5, and the two ends of the scraper ring 7 are respectively slidably connected with the two sliding columns 5, and the outer wall of the scraper ring 7 is in contact with the inner pipe 1; a first elastic component 8 (such as a spring, etc.) is connected to the single sliding column 5, and the other end of the first elastic component 8 is fixedly connected to the scraper ring 7; a driving unit is connected to the scraper ring 7, and the driving unit is used to drive the scraper ring 7 to form a sliding action on the sliding column 5. The more specific structure of the driving unit is as follows.

[0029] One embodiment of the drive unit is: the drive unit includes an electric telescopic rod (existing products can be directly used), the electric telescopic rod is fixedly connected to the inner pipe 1, and the telescopic shaft of the electric telescopic rod is fixedly connected to the adjacent end surface of the scraper ring 7; the embodiment of the drive unit is not shown in the figure.

[0030] Another embodiment of the drive unit is: Figure 4-5 ,in, Figure 4 FIG. 1 shows a schematic diagram of an assembly structure of another embodiment of a drive unit. Figure 5What is shown is a partial structural schematic diagram of another embodiment of the driving unit. It can be seen from the above two figures that the driving unit includes a pull rope 9 (for example, the pull rope 9 can be a steel wire rope, etc.), one end of the pull rope 9 is fixedly connected to the scraper ring 7, and the other end of the pull rope 9 movably penetrates the adjacent wall surface of the inner pipe 1; a guide column 10 is fixedly connected along the longitudinal extension inside the outer sleeve 2, and an annular plug body 11 is slidably connected to the guide column 10, and a second elastic component 12 (for example, the second elastic component 12 can be a spring, etc.) is connected to the guide column 10; the ring portion of the annular plug body 11 is slidably matched with the outer wall of the inner pipe 1, and the outer surface of the annular plug body 11 is slidably matched with the inner side of the outer sleeve 2; in order to enable the annular plug body 11 to move smoothly on the inner pipe 1 along a predetermined trajectory, a flange is formed on the outer wall of the annular plug body 11, and a longitudinal groove 13 is formed on the inner wall of the outer sleeve 2, and the longitudinal groove 13 is slidably connected to the flange. The other end of the pull rope 9 is fixedly connected to the annular plug body 11, and it is defined that when the second elastic component 12 gradually changes from a natural state to a compressed state, the first elastic component 8 gradually changes from a stretched state to a natural state, and the scraper ring 7 moves with the loose pull rope 9; and the scraper ring 7 moves under the action of the first elastic component 8, and the moving scraper ring 7 can scrape impurities from the inner wall of the inner pipe 1, and take away the scraped impurities under the action of the hot air flow, thereby finally completing the cleaning of impurities. The drive unit also includes an exhaust fan 14, which is installed on the air supply pipe 4, and the exhaust fan 14 is used to draw the hot air flow in the inner pipe 1 into the outer pipe sleeve 2. The elasticity of the second elastic component 12 is greater than the elasticity of the first elastic component 8.

[0031] The working principle of another embodiment of the drive unit is as follows: First, Figure 4 As shown in , when it is necessary to clean the impurities in the inner pipeline 1, the exhaust fan 14 is started, and the exhaust fan 14 draws the hot air flow in the inner pipeline 1 into the outer pipe sleeve 2 through the air supply pipe 4. As the hot air flow pressure in the outer pipe sleeve 2 on one side of the annular plug body 11 gradually increases, the annular plug body 11 moves along the direction a1 under the extrusion of the hot air flow, and the second elastic component 12 is compressed and deformed at this time; then, since it is no longer pulled and restrained by the annular plug body 11, the pull rope 9 moves under the pulling action of the scraper ring 7 and the first elastic component 8, and the pull rope 9 moves along the direction a1 when moving in the outer pipe sleeve 2, and moves along the direction a2 when moving in the inner pipeline 1 (as shown in FIG. Figure 5 Finally, when the annular plug body 11 passes through the hole 3, the hot air flow enters the inner pipe 1 from the hole 3, and the scraping ring 7 effectively scrapes away the impurities on the surface of the inner pipe 1 when moving in the inner pipe 1, and with the assistance of the hot air flow flowing in the inner pipe 1, the scraped impurities are cleaned and taken away.

[0032] It is worth noting that: first, when the annular plug body 11 moves and reaches the hole 3, the annular plug body 11 scrapes away the impurities scraped off the outer wall of the inner pipe 1 and the inner wall of the outer pipe sleeve 2. At this time, because the hole 3 is connected to the inside of the inner pipe 1 and the hot air flow in the inner pipe 1 continues to flow, the impurities generated between the inner pipe 1 and the outer pipe sleeve 2 will be sucked into the inner pipe 1 through the hole 3 simply by relying on the negative pressure principle. Second, after the annular plug body 11 passes through the hole 3, the impurities generated between the inner pipe 1 and the outer pipe sleeve 2 still enter the inner pipe 1 through the hole 3 by relying on the negative pressure and the exhaust fan 14. Third, when the annular plug body 11 is reset and passes through the hole 3 again, the remaining impurities between the inner pipe 1 and the outer pipe sleeve 2 enter the inner pipe 1 through the hole 3 again by relying on the negative pressure principle. Fourth, the impurities scraped off by the scraping ring 7 in the inner pipe 1 will of course flow in the inner pipe 1 with the hot air flow.

[0033] To sum up, all the impurities scraped away will flow in the inner pipe 1 with the hot air flow, and a bag dust collector will be set at the outlet end of the inner pipe 1. The bag dust collector is used to remove the impurities scraped away by the hot air flow (this embodiment mainly focuses on how to scrape away the impurities, and the treatment of the impurities after scraping away will not be repeated).

[0034] The aperture of the hole 3 is large enough not to affect the passage of impurities.

[0035] Among them, the continuous influx of hot air from the previous section and the continuous reheating of the hot air by itself achieve the insulation effect.

[0036] The present invention combines a double-layer pipe with a cleaning mechanism, which can not only utilize the residual heat of the hot air flow to insulate the waste gas conveying pipe itself, but also can clean the impurities in the pipe compared with the prior art.

[0037] Of course, in the actual design process, the existing Teflon material can also be directly selected to be coated on the pipe wall of the inner pipe 1, which can also prevent the colloid (such as chloroprene rubber) from adhering to the pipe wall in advance to a certain extent.

[0038] Embodiment 2, this embodiment provides a cold and heat exchange system, including the exhaust gas delivery pipeline in embodiment 1; during the hot gas flow in the inner pipeline 1, it is inevitable that the air pressure will occasionally be unstable. Once the air pressure is too high, the exhaust gas delivery pipeline may burst; therefore, as a solution for the exhaust gas delivery pipeline, refer to Figure 6 , which shows a schematic diagram of the installation structure of the explosion-proof mechanism. It can be seen from the figure that the present invention further designs an explosion-proof mechanism, which is installed on a single inner pipeline 1. The explosion-proof mechanism is used to deflate the gas in the inner pipeline 1 that exceeds the preset maximum air pressure; the specific structure of the explosion-proof mechanism is as follows.

[0039] Further integration Figure 7 The schematic diagram of the three-dimensional structure of the explosion-proof mechanism shown in Figure 6-7 It can be seen that the explosion-proof mechanism includes an exhaust pipe 15, which is connected to the inner pipe 1 in a through manner, and the cavity of the exhaust pipe 15 is connected to the inner pipe 1; a block 16 is slidably connected to the cavity of the exhaust pipe 15, and a first through hole 17 is formed on the block 16, and a second through hole 18 is formed on the exhaust pipe 15, and the first through hole 17 can be opposite to the second through hole 18 and form a connection; a third elastic component 19 (such as a spring, etc.) is connected to the flange of the block 16, and the other end of the third elastic component 19 is fixedly connected to the edge of the exhaust pipe 15; at the same time, the following definition is made: when the third elastic component 19 is in a natural state, the first through hole 17 and the second through hole 18 are in a completely misaligned state, and the block 16 blocks the exhaust pipe 15. According to the maximum air pressure that the inner pipe 1 can withstand, the third elastic component 19 with the corresponding elastic coefficient is selected. During actual use of the explosion-proof mechanism, once the air pressure of the hot air flow in the inner pipeline 1 is greater than the elasticity of the third elastic component 19, the block 16 moves downward along the cavity of the exhaust pipe 15 under the pressure of the hot air flow; until the first through hole 17 and the second through hole 18 are opposite to each other and connected, the hot air flow in the inner pipeline 1 flows out from the channel formed between the first through hole 17 and the second through hole 18 and is discharged to the outside; once the air pressure value of the hot air flow in the inner pipeline 1 returns to a stable state (the air pressure of the hot air flow in the inner pipeline 1 is less than the elasticity of the third elastic component 19), the third elastic component 19 drives the block 16 to return to its original position until the first through hole 17 and the second through hole 18 are completely misaligned.

[0040] After the exhaust gas conveying pipeline has been used for a long time, the outer surface of the outer pipe sleeve 2 and the edge of the inner pipe 1 may be covered with a large amount of dust and debris. If the dust and debris on the outer pipe sleeve 2 and the inner pipe 1 are not cleaned for a long time, the heat dissipation effect of the outer pipe sleeve 2 and the inner pipe 1 will inevitably be affected in the long run; for this reason, the present invention further optimizes the explosion-proof mechanism, and the specific optimization scheme of the explosion-proof mechanism is as follows.

[0041] Specifically, refer to Figure 8, which shows a schematic diagram of the optimized explosion-proof mechanism assembly structure. It can be seen from the figure that the explosion-proof mechanism also includes a tooth plate 20, which is fixedly connected to the block 16; one side of the tooth portion of the tooth plate 20 is meshed with a transmission gear 21, and the transmission gear 21 is rotatably connected to the support rod 22 on the outer wall of the outer sleeve 2; one side of the transmission gear 21 is meshed with an annular toothed disk 23, which is concentrically and rotatably sleeved on the outer wall of the inner pipe 1; one side of the annular toothed disk 23 is meshed with gear teeth 24, and a rotating shaft 25 is concentrically fixedly connected to the center of the gear teeth 24, and the rotating shaft 25 is rotatably connected to two protrusions on the outer wall of the outer sleeve 2 (the number of protrusions is designed according to actual needs); a plurality of impellers 26 are concentrically fixedly connected to the rotating shaft 25 (for example, the number of impellers 26 in this embodiment is 6, or other numbers). When the explosion-proof mechanism is in the exhaust process, such as Figure 8 As shown in the figure, the block 16 drives the tooth plate 20 to move along the direction b, and the moving tooth plate 20 sequentially links the transmission gear 21 to move along the direction c1, the annular toothed disc 23 to move along the direction c2, and the gear 24 to move along the direction c1. Finally, the multiple impellers 26 are used to blow and clean the dust and debris on the outer pipe sleeve 2 and the inner pipe 1 during the rotation process. The present invention can prevent the explosion of the pipeline through the optimized design of the explosion-proof mechanism, and can also link the impeller 26 to clean the outer surface of the exhaust gas conveying pipeline during the pressure relief process.

[0042] As a further optimization of the explosion-proof mechanism, refer to Fig. 9 The schematic diagram of the explosion-proof mechanism structure with two gear teeth 24 is shown in the figure. It can be seen from the figure that the optimization scheme is: the number of gear teeth 24 is two, and the two gear teeth 24 are respectively meshed and matched on the left and right sides of the annular gear disk 23, and the corresponding gear teeth 24 are fixedly connected with a rotating shaft 25, and the rotating shaft 25 is provided with a fan wheel 26; of course, the number of gear teeth 24 is not limited to two, and can also be other numbers, which will not be further explained here.

Claims

1. An exhaust gas delivery pipeline, characterized in that: The invention comprises at least one double-layer tube, wherein the double-layer tube is connected by an outer tube sleeve (2) and an inner tube (1) from the outside to the inside, and the inner tube (1) and the outer tube sleeve (2) are both hollow structures; one side of the inner tube (1) and the outer tube sleeve (2) are connected by a hole (3), and the other side of the inner tube (1) and the outer tube sleeve (2) are connected by at least a single air supply pipe (4); a cleaning mechanism is provided on the tube wall of the inner tube (1), and the cleaning mechanism is used to clean impurities in the inner tube (1). The cleaning mechanism comprises at least one sliding column (5), the two ends of the sliding column (5) are fixedly connected to the inner side of the inner pipe (1), the sliding column (5) is slidably connected to a scraper ring (7), and the scraper ring (7) is in contact and fit with the inner pipe (1); the sliding column (5) is connected to the scraper ring (7) via a first elastic component (8); the scraper ring (7) is connected to a driving unit, and the driving unit is used to drive the scraper ring (7) to complete a sliding action on the sliding column (5) and the surface of the inner pipe (1).

2. The exhaust gas delivery pipeline according to claim 1, characterized in that: An outlet end and an inlet end are formed on both sides of the inner pipe (1), the inlet end of the inner pipe (1) is adjacent to the hole (3), and the outlet end of the inner pipe (1) is adjacent to the air delivery pipe (4); multiple inner pipes (1) are connected end to end in sequence and together form an entire exhaust gas delivery pipeline.

3. The exhaust gas conveying pipeline according to claim 1, characterized in that: The drive unit comprises an electric telescopic rod, the electric telescopic rod is fixedly connected to the inner pipeline (1), and the telescopic shaft of the electric telescopic rod is fixedly connected to the scraper ring (7).

4. The exhaust gas conveying pipeline according to claim 1, characterized in that: The drive unit comprises a pull rope (9), one end of which is fixedly connected to the scraper ring (7), and the other end of which movably passes through the inner pipeline (1) and is fixedly connected to the annular plug body (11); the annular plug body (11) is slidably connected to a guide column (10) of an outer pipe sleeve (2), and a second elastic component (12) is connected between the guide column (10) and the annular plug body (11); the inner and outer walls of the annular plug body (11) are respectively slidably matched with the outer pipe sleeve (2) and the inner pipeline (1); when the second elastic component (12) is in a natural state, the first elastic component (8) is in a stretched state; an exhaust fan (14) is provided on the air supply pipe (4), and the exhaust fan (14) is used to draw hot air flow in the inner pipeline (1) into the outer pipe sleeve (2); the elasticity of the second elastic component (12) is greater than the elasticity of the first elastic component (8).

5. The exhaust gas conveying pipeline according to claim 4 is characterized in that: A flange is formed on the outer wall of the annular plug body (11), and a longitudinal groove (13) is formed on the inner wall of the outer pipe sleeve (2). The longitudinal groove (13) and the flange are slidably connected.

6. A cold and heat exchange system, characterized in that: The exhaust gas conveying pipeline comprises the exhaust gas conveying pipeline as claimed in any one of claims 1 to 5, and further comprises an explosion-proof mechanism, wherein the explosion-proof mechanism is connected to the corresponding inner pipeline (1), and the explosion-proof mechanism is used to release the gas in the inner pipeline (1) that exceeds a preset maximum pressure.

7. The heat exchange system according to claim 6, characterized in that: The explosion-proof mechanism comprises an exhaust pipe (15), wherein the exhaust pipe (15) is connected to the inner pipe (1) in a through manner, and the cavity of the exhaust pipe (15) is in communication with the inner pipe (1); a block (16) is slidably connected to the cavity of the exhaust pipe (15), and a first through hole (17) of the block (16) is in communication with a second through hole (18) of the exhaust pipe (15); the block (16) is connected to the exhaust pipe (15) via a third elastic component (19); when the third elastic component (19) is in a natural state, the first through hole (17) and the second through hole (18) are in a completely misaligned state, and the block (16) blocks the exhaust pipe (15).

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