A chimney tube unit structure

Abstract

The utility model relates to a chimney structure technical field especially relates to a chimney's tubular body unit structure, including flue gas guide pipe, thermal stress adjusting tube, flue gas ascending mechanism and tubular body positioning connection assembly, the inside of flue gas guide pipe is provided with flue gas climbing chamber, the inside of flue gas climbing chamber is equipped with flue gas ascending mechanism, flue gas guide pipe is equipped with multiple groups, and multiple groups flue gas guide pipe are equipped with thermal stress adjusting tube, and flue gas guide pipe and thermal stress adjusting tube are mutually spaced and set up, the utility model realizes the guide flue gas spiral ascending through flue gas ascending mechanism, effectively avoided traditional vertical channel in flue gas turbulent flow phenomenon, reduced local resistance, makes flue gas more smoothly discharge, significantly improved the exhaust efficiency, and thermal stress adjusting tube can produce stress when tubular body because of thermal expansion and cold shrink, effectively absorbs thermal stress through the telescopic of itself, avoids the whole structure and leads to the tubular body deformation, weld cracking and other problems because of the lack of stress release mechanism.

Description

Technical Field

[0001] This utility model relates to the field of chimney structure technology, and in particular to a chimney tube unit structure. Background Technology

[0002] In traditional chimney design, chimneys are usually designed as a single, integrated structure for flue gas emission. Their pipe structure is relatively simple, and their main function is to provide an upward channel for flue gas to discharge the exhaust gases produced by combustion into the atmosphere. However, this traditional chimney has gradually revealed many problems when dealing with complex working conditions and long-term usage requirements, making it difficult to meet the performance and stability requirements of modern industrial production.

[0003] In practical applications, existing chimney structures, due to their vertical channels, are prone to two problems. First, the flue gas in the vertical channels is prone to turbulence due to uneven flow velocity, which leads to increased local resistance and reduced exhaust efficiency. Second, they are not capable of handling thermal stress. The temperature difference between the high-temperature flue gas and the external environment causes the pipe body to undergo periodic thermal expansion and contraction. The integral structure lacks an effective stress release mechanism, which can easily lead to pipe deformation and weld cracking over time.

[0004] Therefore, in view of the defects of the existing chimney structure in practical applications, a pipe unit structure for the chimney can be designed. By setting a flue gas guiding mechanism in the pipe body to optimize the flue gas flow path, and adding a thermal stress adjustment component between adjacent pipe sections, the stress generated by thermal expansion and contraction can be absorbed by the extensible structure to avoid damage to the entire pipe body, thereby facilitating the solution of the above problems. Utility Model Content

[0005] In order to overcome the shortcomings of existing chimney structures in practical applications, such as flue gas easily forming turbulence due to uneven flow velocity, resulting in increased local resistance, reduced exhaust efficiency, and lack of effective stress release mechanism, which can easily lead to pipe deformation and weld cracking over time, this utility model provides a chimney pipe unit structure.

[0006] The technical solution is as follows: A chimney tube unit structure includes a flue gas guide tube, a thermal stress regulating tube, a flue gas swirl mechanism, and a tube positioning connection assembly; the flue gas guide tube has a flue gas climbing chamber for flue gas to rise and be discharged, and the flue gas climbing chamber has a flue gas swirl mechanism to promote the spiral climbing of flue gas. There are multiple sets of flue gas guide tubes, and thermal stress regulating tubes for releasing the thermal stress of flue gas are provided between the multiple sets of flue gas guide tubes. The flue gas guide tubes and thermal stress regulating tubes are spaced apart from each other, and the outer end of the connection between the flue gas guide tubes and the thermal stress regulating tubes is provided with a tube positioning connection assembly for connecting the two.

[0007] Furthermore, the flue gas swirl mechanism includes multiple sets of spiral guide vanes, which are arranged around the inner wall of the flue gas climbing chamber, and guide grooves are provided between the multiple sets of spiral guide vanes.

[0008] Furthermore, the thermal stress regulating pipe includes an upper connecting pipe and a lower connecting pipe, and a spiral thermal stress expansion pipe is provided between the upper connecting pipe and the lower connecting pipe. The spiral thermal stress expansion pipe has a thermal stress release chamber that communicates with the flue gas climbing chamber.

[0009] Furthermore, the bottom and top of the outer end of the spiral thermal stress expansion tube are respectively fitted with two sets of annular fixing discs. The upper surface of the bottom annular fixing disc is surrounded by four sets of guide sleeves, and the inside of the guide sleeves is provided with lifting guide grooves. The lower surface of the top annular fixing disc is surrounded by four sets of guide rods, and the lower ends of the guide rods extend into the inside of the lifting guide grooves.

[0010] Furthermore, the inner wall of the lifting guide groove is provided with four sets of limiting lifting grooves, and the bottom of the outer end of the guide rod is provided with four sets of limiting blocks corresponding to the limiting lifting grooves.

[0011] Furthermore, the pipe positioning and connection assembly includes an upper connecting clamp and a lower connecting clamp. The outer ends of the upper connecting clamp and the lower connecting clamp are all provided with four sets of second mounting holes. The top and bottom edges of the outer end of the flue gas guide pipe are provided with first mounting holes corresponding to the second mounting holes. The outer ends of the upper connecting pipe and the lower connecting pipe are also provided with first mounting holes corresponding to the second mounting holes.

[0012] Furthermore, an annular retaining seat is fitted at the bottom edge of the outer end of the upper connecting hoop, and a slot is opened at the bottom of the annular retaining seat. An annular inserting disc is fitted at the top edge of the outer end of the lower connecting hoop, and the annular inserting disc matches and engages with the slot. Four sets of splicing holes are opened around the surface of the annular inserting disc, and the four sets of splicing holes pass through the annular inserting disc and the annular retaining seat.

[0013] The beneficial effects are that, compared with the defects of existing chimney structures in practical applications, this application guides the flue gas to rise in a spiral manner through multiple sets of spiral guide plates of the flue gas rising and swirling mechanism, effectively avoiding the flue gas turbulence phenomenon in traditional vertical channels, reducing local resistance, and enabling the flue gas to be discharged more smoothly, significantly improving the flue gas exhaust efficiency; the setting of the thermal stress regulating pipe, especially the application of the spiral thermal stress expansion pipe, can effectively absorb thermal stress through its own expansion and contraction when the pipe body generates stress due to thermal expansion and contraction, avoiding problems such as pipe body deformation and weld cracking caused by the lack of stress release mechanism in the integral structure; the upper connecting hoop and the lower connecting hoop can be quickly connected together with bolts through the first mounting hole and the second mounting hole. Meanwhile, the matching engagement of the annular embedded disc and the slot serves as a pre-positioning mechanism, facilitating alignment during installation and improving installation efficiency. Through the cooperation of components such as the guide sleeve, guide rod, limit lifting groove, and limit block, precise guidance and a reasonable stroke range are provided for the expansion and contraction of the spiral thermal stress expansion tube. This ensures that the thermal stress adjustment tube can only expand and contract axially during thermal expansion and contraction, avoiding lateral offset or misalignment. This further enhances the stability and reliability of the entire chimney tube unit structure, enabling it to meet the high requirements of modern industrial production for chimney performance and stability. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the chimney tube unit structure of this utility model; Figure 2 This is a three-dimensional structural diagram of the flue gas guide pipe of this utility model; Figure 3 This is a three-dimensional structural diagram of the spiral thermal stress expansion tube of this utility model; Figure 4 This is a schematic diagram of the cross-sectional structure of the spiral thermal stress expansion tube of this utility model; Figure 5 This is a three-dimensional structural diagram of the tube positioning and connecting assembly of this utility model.

[0015] Explanation of reference numerals in the attached drawings: 1. Flue gas guide pipe; 101. Flue gas climbing chamber; 102. Guide groove; 2. Thermal stress adjustment pipe; 201. Upper connecting pipe; 202. Lower connecting pipe; 203. Spiral thermal stress expansion pipe; 204. Thermal stress release chamber; 205. Annular fixed plate; 206. Guide sleeve; 207. Guide rod; 208. Lifting guide groove; 209. Limiting lifting groove; 210. Limiting block; 3. Flue gas lifting and swirling mechanism; 301. Spiral guide plate; 4. Pipe body positioning and connecting assembly; 401. Upper connecting clamp; 402. Annular seat; 403. Slot; 404. Second mounting hole; 405. Lower connecting clamp; 406. Annular embedded plate; 407. Splicing hole; 5. First mounting hole. Detailed Implementation

[0016] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Example

[0017] like Figures 1-5 As shown, a chimney tube unit structure includes a flue gas guide pipe 1, a thermal stress regulating pipe 2, a flue gas swirl mechanism 3, and a tube positioning connection assembly 4. The flue gas guide pipe 1 has a flue gas climbing chamber 101 for flue gas to rise and be discharged. The flue gas climbing chamber 101 has a flue gas swirl mechanism 3 for promoting the spiral climbing of flue gas. The flue gas guide pipe 1 is provided in multiple sets, and a thermal stress regulating pipe 2 for releasing the thermal stress of flue gas is provided between the multiple sets of flue gas guide pipe 1. The flue gas guide pipe 1 and the thermal stress regulating pipe 2 are spaced apart from each other. The tube positioning connection assembly 4 for connecting the two is provided at the outer end of the connection between the flue gas guide pipe 1 and the thermal stress regulating pipe 2.

[0018] The flue gas swirling mechanism 3 includes multiple sets of spiral guide vanes 301, which are arranged around the inner wall of the flue gas climbing chamber 101. Guide grooves 102 are formed between the multiple sets of spiral guide vanes 301. Through the arrangement of the multiple sets of spiral guide vanes 301, the flue gas can be guided to move spirally upward along the guide grooves 102, which effectively avoids the turbulence phenomenon caused by uneven flow velocity of flue gas in traditional vertical channels. This spiral upward path makes the flue gas flow more orderly, reduces local resistance, and thus significantly improves the exhaust efficiency.

[0019] The thermal stress regulating pipe 2 includes an upper connecting pipe 201 and a lower connecting pipe 202. A spiral thermal stress expansion pipe 203 is provided between the upper connecting pipe 201 and the lower connecting pipe 202. The spiral thermal stress expansion pipe 203 has a thermal stress relief chamber 204 that communicates with the flue gas climbing chamber 101. Through the spiral thermal stress expansion pipe 203, when the pipe body expands and contracts due to the temperature difference between the high-temperature flue gas and the external environment, it can absorb thermal stress through its own expansion and contraction. The thermal stress relief chamber 204 ensures that the normal flow of flue gas is not affected.

[0020] Two sets of annular fixing discs 205 are respectively fitted at the bottom and top of the outer end of the spiral thermal stress expansion tube 203. Four sets of guide sleeves 206 are arranged around the upper surface of the bottom annular fixing disc 205. The guide sleeves 206 have lifting guide grooves 208 inside. Four sets of guide rods 207 are arranged around the lower surface of the top annular fixing disc 205. The lower ends of the guide rods 207 extend into the lifting guide grooves 208. Through the movement of the guide rods 207 in the lifting guide grooves 208, a precise guiding effect is provided for the expansion and contraction of the spiral thermal stress expansion tube 203, ensuring that it can only expand and contract along the axial direction during thermal expansion and contraction, avoiding lateral offset or misalignment, and ensuring the stability and reliability of the overall structure of the thermal stress adjustment tube 2.

[0021] The inner wall of the lifting guide groove 208 is provided with four sets of limiting lifting grooves 209, and the bottom of the outer end of the guide rod 207 is provided with four sets of limiting blocks 210 corresponding to the limiting lifting grooves 209. The cooperation between the limiting lifting grooves 209 and the limiting blocks 210 sets a reasonable stroke range for the extension and retraction of the spiral thermal stress expansion tube 203. When the spiral thermal stress expansion tube 203 expands and contracts to a certain extent, the limiting block 210 will contact the end of the limiting lifting groove 209, thereby limiting the spiral thermal stress expansion tube 203 from continuing to extend and retract.

[0022] The pipe positioning and connecting assembly 4 includes an upper connecting clamp 401 and a lower connecting clamp 405. The outer ends of the upper connecting clamp 401 and the lower connecting clamp 405 are all provided with four sets of second mounting holes 404. The top and bottom edges of the outer end of the flue gas guide pipe 1 are provided with first mounting holes 5 corresponding to the second mounting holes 404. The outer ends of the upper connecting pipe 201 and the lower connecting pipe 202 are also provided with first mounting holes 5 corresponding to the second mounting holes 404. By using the upper connecting clamp 401 and the lower connecting clamp 405 in conjunction with the first mounting holes 5 and the second mounting holes 404, the pipe positioning and connecting assembly 4 can be easily installed on each component using bolts.

[0023] An annular retainer 402 is fitted at the bottom edge of the outer end of the upper connecting clamp 401. A groove 403 is provided at the bottom of the annular retainer 402. An annular insert plate 406 is fitted at the top edge of the outer end of the lower connecting clamp 405. The annular insert plate 406 matches and engages with the groove 403. Four sets of splicing holes 407 are provided around the surface of the annular insert plate 406. The four sets of splicing holes 407 penetrate the annular insert plate 406 and the annular retainer 402. The matching and engagement of the annular insert plate 406 and the groove 403 plays a role in pre-positioning when the pipe body positioning connection assembly 4 is connected, which facilitates the alignment and installation of the upper connecting clamp 401 and the lower connecting clamp 405 and improves the installation efficiency. The splicing holes 407 can be further strengthened by bolts to enhance the connection between the annular retainer 402 and the annular chuck, making the connection between the upper connecting clamp 401 and the lower connecting clamp 405 tighter and more secure.

[0024] During the work, the first step is to conduct on-site measurements and planning. Based on the actual site conditions and smoke exhaust requirements, the overall height, diameter, and other parameters of the chimney are determined, and the installation positions of each pipe unit structure are planned. Next, the pipe unit structures are assembled. The flue gas guide pipe 1 and the thermal stress regulating pipe 2 are placed in a spaced-apart arrangement. At the connection points, the pipe positioning connection assembly 4 is prepared for installation. The upper connecting clamp 401 and the lower connecting clamp 405 are placed at the connection points between the flue gas guide pipe 1 and the thermal stress regulating pipe 2, respectively, so that the upper connecting clamp... The second mounting hole 404 on the lower connecting clamp 401 and the lower connecting clamp 405 are aligned with the first mounting hole 5 on the flue gas guide pipe 1, the upper connecting pipe 201, and the lower connecting pipe 202. Then, bolts are passed through these mounting holes and tightened to complete the initial fixation. During the installation process, the annular embedded plate 406 will naturally embed into the slot 403 of the annular card seat 402, which plays a pre-positioning role and facilitates alignment and installation. Then, bolts are passed through the splicing hole 407 to further strengthen the connection and ensure that the upper connecting clamp 401 and the lower connecting clamp 405 are tightly and firmly connected.

[0025] Following the above method, assemble multiple pipe unit structures in sequence and install them upwards section by section until the planned chimney height is reached, thus completing the construction of the entire chimney.

[0026] Its working principle is as follows: After the flue gas enters the flue gas climbing chamber 101 of the flue gas guide pipe 1, multiple sets of spiral guide plates 301 surrounding the inner wall form a spiral guide groove 102. The flue gas is constrained by the guide groove 102 and forced to rise along the spiral path. This design breaks the state of disordered collision of flue gas in the traditional vertical channel, making the flow velocity distribution more uniform, avoiding the increase of local resistance caused by turbulence, and ensuring the stable and efficient exhaust process. When high-temperature flue gas passes through, the pipe body will expand thermally due to the temperature difference between the inside and outside, and the spiral thermal stress expansion tube 203 will extend axially. When the flue gas temperature decreases or the machine stops, the pipe body will contract, and the spiral thermal stress expansion tube 203 will shorten accordingly, absorbing thermal stress through its own deformation. The guide rod 207 slides synchronously in the lifting guide groove 208 of the guide sleeve 206, restricting the spiral thermal stress expansion tube 203 to move only axially and avoiding lateral deviation. The limiting block 210 cooperates with the limiting lifting groove 209 to prevent excessive expansion and contraction from causing structural damage.

[0027] Its beneficial effects are significant. This application guides the flue gas to rise in a spiral by using multiple sets of spiral guide plates 301 of the flue gas rising and swirling mechanism 3, which effectively avoids the flue gas turbulence phenomenon in traditional vertical channels, reduces local resistance, and allows the flue gas to be discharged more smoothly, significantly improving the flue gas discharge efficiency. The setting of the thermal stress regulating pipe 2, especially the application of the spiral thermal stress expansion pipe 203, can effectively absorb thermal stress through its own expansion and contraction when the pipe body generates stress due to thermal expansion and contraction, avoiding problems such as pipe body deformation and weld cracking caused by the lack of stress release mechanism in the integral structure. The upper connecting hoop 401 and the lower connecting hoop 405 are connected to the bolts through the first mounting hole 5 and the second mounting hole 404, which can quickly connect the various components together. Meanwhile, the matching engagement of the annular embedded plate 406 and the slot 403 serves as a pre-positioning mechanism, facilitating alignment during installation and improving installation efficiency. Through the cooperation of components such as the guide sleeve 206, guide rod 207, limit lifting groove 209, and limit block 210, precise guidance and a reasonable stroke range are provided for the expansion and contraction of the spiral thermal stress expansion tube 203. This ensures that the thermal stress adjustment tube 2 can only expand and contract axially during thermal expansion and contraction, avoiding lateral offset or misalignment. This further enhances the stability and reliability of the entire chimney tube unit structure, enabling it to meet the high requirements of modern industrial production for chimney performance and stability.

Claims

1. A chimney tube unit structure, comprising a flue gas guide pipe (1); characterized in that, It also includes a thermal stress regulating pipe (2), a flue gas swirl mechanism (3) and a pipe body positioning connection assembly (4); the flue gas guide pipe (1) has a flue gas climbing chamber (101) for flue gas to rise and be discharged, and the flue gas climbing chamber (101) has a flue gas swirl mechanism (3) to promote the spiral climbing of flue gas. The flue gas guide pipe (1) has multiple sets, and a thermal stress regulating pipe (2) for releasing the thermal stress of flue gas is provided between the multiple sets of flue gas guide pipes (1). The flue gas guide pipe (1) and the thermal stress regulating pipe (2) are spaced apart from each other. The outer end of the connection between the flue gas guide pipe (1) and the thermal stress regulating pipe (2) is provided with a pipe body positioning connection assembly (4) for connecting the two.

2. The chimney tube unit structure according to claim 1, characterized in that, The flue gas swirling mechanism (3) includes multiple sets of spiral guide plates (301), which are arranged around the inner wall of the flue gas climbing chamber (101), and guide grooves (102) are provided between the multiple sets of spiral guide plates (301).

3. The chimney tube unit structure according to claim 1, characterized in that, The thermal stress regulating pipe (2) includes an upper connecting pipe (201) and a lower connecting pipe (202). A spiral thermal stress expansion pipe (203) is provided between the upper connecting pipe (201) and the lower connecting pipe (202). A thermal stress release chamber (204) communicating with the flue gas climbing chamber (101) is opened inside the spiral thermal stress expansion pipe (203).

4. The chimney tube unit structure according to claim 3, characterized in that, Two sets of annular fixing discs (205) are respectively fitted at the bottom and top of the outer end of the spiral thermal stress expansion tube (203). Four sets of guide sleeves (206) are arranged around the upper surface of the bottom annular fixing disc (205). A lifting guide groove (208) is opened inside the guide sleeve (206). Four sets of guide rods (207) are arranged around the lower surface of the top annular fixing disc (205). The lower end of the guide rod (207) extends into the interior of the lifting guide groove (208).

5. The chimney tube unit structure according to claim 4, characterized in that, The inner wall of the lifting guide groove (208) is provided with four sets of limiting lifting grooves (209), and the bottom of the outer end of the guide rod (207) is provided with four sets of limiting blocks (210) corresponding to the limiting lifting grooves (209).

6. The chimney tube unit structure according to claim 1, characterized in that, The pipe positioning connection assembly (4) includes an upper connecting clamp (401) and a lower connecting clamp (405). The outer ends of the upper connecting clamp (401) and the lower connecting clamp (405) are all provided with four sets of second mounting holes (404). The top and bottom edges of the outer end of the flue gas guide pipe (1) are provided with first mounting holes (5) corresponding to the second mounting holes (404). The outer ends of the upper connecting pipe (201) and the lower connecting pipe (202) are all provided with first mounting holes (5) corresponding to the second mounting holes (404).

7. The chimney tube unit structure according to claim 6, characterized in that, An annular seat (402) is fitted at the bottom edge of the outer end of the upper connecting hoop (401). A slot (403) is opened at the bottom of the annular seat (402). An annular insert plate (406) is fitted at the top edge of the outer end of the lower connecting hoop (405). The annular insert plate (406) matches and engages with the slot (403). Four sets of splicing holes (407) are opened around the surface of the annular insert plate (406). The four sets of splicing holes (407) pass through the annular insert plate (406) and the annular seat (402).

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