A pipe connection device for double-chamber heat storage combustion

Abstract

A pipe connection device for double-chamber heat storage combustion belongs to the field of pipe connection, including a bend pipe, and coaxial rotating pipes are rotatably installed in both ends of the bend pipe. Several sockets are opened on the end face of the rotating pipe near the elbow of the bend pipe. The sockets are evenly distributed along the axis of the rotating pipe. Adjacent sockets are cross-connected, and the sockets on the two rotating pipes correspond to each other. The present invention has a simple structure and an ingenious design. It uses several bent rods and two rotating pipes to form an inner bend pipe and a right-angle transmission cleaning mechanism. The inner bend pipe can increase the structural strength of the bend pipe, reduce the impact of high-temperature flue gas on the elbow, and extend the service life of the elbow. At the same time, it reduces the heat exchange between the bend pipe and the outside world and reduces heat loss; the right-angle transmission cleaning mechanism can reduce smoke and dust scaling at the elbow and automatically clean the smoke and dust scaling. At the same time, it uses the temperature difference change of the pipeline as the driving force for smoke and dust cleaning, which is energy-saving and environmentally friendly, does not require shutdown, can meet actual needs, and is suitable for promotion.

Description

Technical Field

[0001] The invention belongs to the field of pipeline connection, in particular to a pipeline connection device for double-cavity heat storage combustion. Background Art

[0002] Dual-cavity regenerative combustion piping refers to the various gas delivery pipelines used to connect the burner, regenerator, reversing valve, and furnace (or equipment requiring heating) in a dual-cavity regenerative combustion system. Under the control of the reversing valve, the switching channel allows the same set of pipes (or closely related pipe groups) to periodically switch between their functions as combustion air channels and flue gas exhaust channels (usually every few minutes). During this periodic switching, the temperature differential flue between the combustion air and flue gas channels is extremely drastic, making the pipes prone to scaling, especially at elbows. This is the result of the periodic deposition of ash, unburned particles, and low-melting-point compounds in the high-temperature flue gas. Scaling can significantly reduce system efficiency, increase resistance, and even clog the pipes, necessitating targeted cleaning. Traditional cleaning methods rely on external energy-driven equipment (such as compressed air purging) or mechanical slag removal during furnace shutdown, resulting in high energy consumption and significant operational risks. To address these issues, we have invented a dual-cavity regenerative combustion pipe connection device. Summary of the Invention

[0003] The present invention provides a dual-cavity heat storage combustion pipe connection device, which is used to solve the defects in the prior art.

[0004] The present invention is achieved through the following technical solutions:

[0005] A pipe connection device for double-chamber heat storage combustion includes a bent pipe, and coaxial rotating pipes are rotatably installed in both ends of the bent pipe. Several sockets are opened on the end surface of the rotating pipe near the elbow of the bent pipe. The sockets are evenly distributed along the axis of the rotating pipe. Adjacent sockets are cross-connected. The sockets on the two rotating pipes correspond to each other one by one. The same bent rod is slidably provided in the corresponding two sockets. The two rotating pipes form a right-angle transmission cleaning mechanism through the cooperation of the bent rods and the sockets. The adjacent bent rods are in contact and cooperate. The bent rod and the two rotating pipes form an inner bent pipe. The bent pipe is provided with a driving mechanism that can drive the rotating pipe to rotate.

[0006] As described above, a dual-cavity heat storage combustion pipe connection device, the bent pipe includes an elbow, a connecting pipe and a flange pipe, the two ends of the elbow are fixedly connected to the flange pipe through the connecting pipe, an annular cavity is formed between the connecting pipe and the rotating pipe, and the driving mechanism is located in the annular cavity.

[0007] As described above, a dual-chamber heat storage combustion pipe connection device, the driving mechanism includes a rotating ring, the rotating ring and the rotating tube are rotatably connected through a one-way bearing, a plurality of shift rods are fixedly installed on the outer periphery of the rotating ring, a thermal bimetallic strip is provided between the shift rods, one end of the thermal bimetallic strip is fixedly connected to the connecting tube, and the other end is located between the two shift rods.

[0008] In the above-mentioned dual-cavity heat storage combustion pipe connection device, a rotating baffle ring is fixedly installed on the outer periphery of the rotating tube, a fixed baffle ring is fixedly installed on the connecting tube, and the rotating baffle ring is slidably located between the fixed baffle ring and the flange tube.

[0009] In the dual-chamber heat storage combustion pipe connection device as described above, the flange pipe is fixedly connected to one end of the scraper strip, and the other end of the scraper strip is located in the rotating tube, and the scraper strip is gap-fitted with the inner wall of the rotating tube.

[0010] The advantages of the present invention are: the present invention has a simple structure and ingenious design, and utilizes several bent rods and two rotating tubes to form an inner bent pipe and a right-angle transmission cleaning mechanism. The inner bent pipe can increase the structural strength of the bent pipe, reduce the impact of high-temperature flue gas on the elbow, extend the service life of the elbow, and at the same time reduce the heat exchange between the elbow and the outside world, reducing heat loss; the right-angle transmission cleaning mechanism can reduce smoke and dust scaling at the elbow, and automatically clean the smoke and dust scaling, and at the same time utilize the temperature difference change of the pipeline as the driving force for smoke and dust cleaning, which is energy-saving and environmentally friendly, does not require shutdown, can meet actual needs, and is suitable for promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0012] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 yes Figure 1 Schematic diagram of the cross section at point A; Figure 3 yes Figure 1 A partial enlarged view of point Ⅰ; Figure 4 yes Figure 2 A partial enlarged view of point II.

[0013] Figure numbers: 1, elbow, 2, rotating pipe, 3, jack, 4, bending rod, 20, elbow, 21, connecting pipe, 22, flange pipe, 30, rotating ring, 31, lever, 32, thermal bimetallic strip, 40, rotating retaining ring, 41, fixed retaining ring, 50, scraper strip. DETAILED DESCRIPTION

[0014] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0015] A dual-chamber heat storage combustion pipe connection device, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, it includes a bend 1, which is a right-angle bend. Coaxial rotating tubes 2 are rotatably installed in both ends of the bend 1. Several sockets 3 are opened on the end face of the rotating tube 2 near the elbow of the bend 1. The sockets 3 are evenly distributed along the axis of the rotating tube 2. Adjacent sockets 3 are cross-connected. The sockets 3 located on the end face of the same rotating tube 2 are connected to form an annular groove. The annular groove is coaxially arranged with the rotating tube 2. The sockets 3 on the two rotating tubes 2 correspond to each other one by one. The same bending rod 4 is slidably provided in the corresponding two sockets 3. The bending rod 4 is a right-angle bending rod composed of two straight rods and a connecting rod. The axes of the two straight rods are perpendicular to each other and intersect. The two rotating tubes 2 form a right-angle transmission cleaning mechanism through the cooperation of the bending rod 4 and the socket 3. The adjacent bending rods 4 are in contact and cooperate. The bending rod 4 and the two rotating tubes 2 form an inner bend. The bend 1 is provided with a driving mechanism that can drive the rotating tube 2 to rotate. The present invention has a simple structure and an ingenious design. It utilizes several bending rods 4 and two rotating tubes 2 to form an inner bend and a right-angle transmission cleaning mechanism. The inner bend can increase the structural strength of the bend 1, reduce the impact of high-temperature flue gas on the elbow 20, extend the service life of the elbow 20, and at the same time reduce the heat exchange between the bend 1 and the outside world, reducing heat loss; the right-angle transmission cleaning mechanism can reduce smoke scaling at the elbow 20 and automatically clean the smoke scaling. At the same time, it utilizes the temperature difference change of the pipeline as the driving force for smoke cleaning, which is energy-saving and environmentally friendly, does not require shutdown, can meet actual needs, and is suitable for promotion. When using this device, the bend pipe 1 is connected to the switching channel in the double-chamber heat storage combustion system, and the flue gas and combustion-supporting air circulate through the inner bend pipe. The inner bend pipe and the bend pipe 1 form a double-layer channel, which reduces the impact of the high-temperature flue gas on the bend pipe 1 and reduces the heat loss of the high-temperature flue gas and the combustion-supporting air; the hard smoke dust carried in the high-temperature flue gas will scale on the bend rod 4. When the scale needs to be cleaned, the driving mechanism drives the rotating tube 2 to rotate, and the rotating tube 2 drives the bend rod 4 to slide in the socket 3, so that the bend rod 4 located at the outer corner of the bend pipe 1 continuously changes its position in a cycle, and the bend rod 4 slides in the socket 3. During the process of inserting the bend rod 4 into the socket 3, the smoke and dust scale adhered to the outer periphery of the bend rod 4 is scraped off, thereby cleaning the bend rod 4, thereby reducing scaling and blockage at the elbow 20 of the bend pipe 1, and the cleaned smoke and dust scale is discharged with the combustion-supporting air or flue gas.

[0016] Specifically, if Figure 1 As shown, the elbow 1 described in this embodiment includes an elbow 20, a connecting pipe 21 and a flange pipe 22. The two ends of the elbow 20 are fixedly connected to the flange pipe 22 through the connecting pipe 21. The two ends of the elbow 20 are coaxially arranged with the corresponding connecting pipe 21 and the flange pipe 22. One end of the connecting pipe 21 is fixedly connected to the elbow 20, and the other end is fixedly connected to the flange pipe 22. The inner periphery of the end of the elbow 20 is in sliding contact with the outer periphery of the corresponding rotating tube 2. The inner periphery of the rotating tube 2 and the inner periphery of the corresponding flange pipe 22 are in the same curved surface. The flange pipe 22 is used for pipeline connection. An annular cavity is formed between the connecting pipe 21 and the rotating tube 2, and the driving mechanism is located in the annular cavity.

[0017] Specifically, such as Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the driving mechanism described in this embodiment includes a rotating ring 30, which is rotatably connected to the rotating tube 2 through a one-way bearing. The rotating ring 30, the rotating tube 2 and the one-way bearing are coaxially arranged. The inner ring of the one-way bearing is fixedly connected to the rotating tube 2, and the outer ring is fixedly connected to the rotating ring 30. Several levers 31 are fixedly installed on the outer periphery of the rotating ring 30, and thermal bimetallic strips 32 are provided between the levers 31. The levers 31 and the thermal bimetallic strips 32 are evenly distributed along the axis of the corresponding rotating tube 2. One end of the thermal bimetallic strip 32 is fixedly connected to the connecting tube 21, and the other end is located between the two levers 31. By utilizing the huge temperature difference formed when the pipeline switches periodically between the combustion air channel and the flue gas exhaust channel, the thermal bimetallic strip 32 undergoes elastic deformation and recovers elastic deformation, and the free end of the thermal bimetallic strip 32 swings relative to the fixed end. During the swinging process, the thermal bimetallic strip pushes the lever 31, and the lever 31 drives the rotating ring 30 to rotate forward or reverse along the axis of the rotating tube 2. When the rotating ring 30 rotates forward, the rotating tube 2 is driven to rotate through the one-way bearing. When the rotating ring 30 rotates reversely, the rotating tube 2 cannot be driven to rotate through the one-way bearing, so that the rotating tube 2 keeps rotating in the reverse direction, thereby realizing the driving of the rotating tube 2; and by utilizing the frequent changes in temperature difference, the rotating tube 2 is frequently rotated in the reverse direction, so that the bending rod 4 exposed to the high temperature area outside the elbow of the bent pipe 1 is periodically rotated, thereby preventing the high-temperature flue gas from constantly impacting the fixed bending rod 4, thereby improving the service life of the bending rod 4.

[0018] Further, such as Figure 1 and Figure 3As shown, in this embodiment, a rotating retaining ring 40 is fixedly installed on the outer periphery of the rotating tube 2, and a fixed retaining ring 41 is fixedly installed on the connecting tube 21. The rotating retaining ring 40 slides between the fixed retaining ring 41 and the flange tube 22. The rotating retaining ring 40 and the fixed retaining ring 41 are coaxially arranged with the corresponding connecting tube 21. One side of the rotating retaining ring 40 slides in contact with the end face of the flange tube 22 near the elbow 20 to reduce the entry of soot into the connecting tube 21. The other side of the rotating retaining ring 40 slides in contact with the end face of the fixed retaining ring 41. The rotating tube 2 is rotatably installed between the connecting tube 21 and the flange tube 22 via the rotating retaining ring 40 and the fixed retaining ring 41.

[0019] Furthermore, if Figure 1 As shown, the flange tube 22 of this embodiment is fixedly connected to one end of a scraper strip 50. The other end of the scraper strip 50 is located within the rotating tube 2, and the scraper strip 50 is loosely fitted with the inner wall of the rotating tube 2. When the rotating tube 2 rotates relative to the flange tube 22, the rotating tube 2 rotates relative to the scraper strip 50, and the scraper strip 50 can scrape away soot and scale adhering to the inner wall of the rotating tube 2.

[0020] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A dual-chamber heat storage combustion pipe connection device, comprising a bend pipe (1), characterized in that: Coaxial rotating tubes (2) are rotatably installed in both ends of the curved tube (1). Several jacks (3) are provided on the end surface of the rotating tube (2) near the elbow of the curved tube (1). The jacks (3) are evenly distributed along the axis of the rotating tube (2). Adjacent jacks (3) are cross-connected. The jacks (3) on the two rotating tubes (2) correspond to each other one by one. The same curved rod (4) is slidably provided in the corresponding two jacks (3). The two rotating tubes (2) form a right-angle transmission cleaning mechanism through the cooperation of the curved rod (4) and the jacks (3). The adjacent curved rods (4) are in contact and cooperate. The curved rod (4) and the two rotating tubes (2) form an inner curved tube. The curved tube (1) is provided with a driving mechanism capable of driving the rotating tube (2) to rotate.

2. A dual-chamber thermal storage combustion pipe connection device according to claim 1, characterized in that: The elbow (1) comprises an elbow (20), a connecting pipe (21) and a flange pipe (22); both ends of the elbow (20) are fixedly connected to the flange pipe (22) via the connecting pipe (21); an annular cavity is formed between the connecting pipe (21) and the rotating pipe (2); and the driving mechanism is located in the annular cavity.

3. A dual-chamber thermal storage combustion pipe connection device according to claim 2, characterized in that: The driving mechanism comprises a rotating ring (30), the rotating ring (30) and the rotating tube (2) being rotatably connected via a one-way bearing, a plurality of shifting rods (31) being fixedly mounted on the outer periphery of the rotating ring (30), a thermal bimetallic strip (32) being provided between the shifting rods (31), one end of the thermal bimetallic strip (32) being fixedly connected to the connecting tube (21), and the other end being located between the two shifting rods (31).

4. A dual-chamber thermal storage combustion pipe connection device according to claim 2, characterized in that: A rotating retaining ring (40) is fixedly mounted on the outer periphery of the rotating tube (2), a fixed retaining ring (41) is fixedly mounted on the connecting tube (21), and the rotating retaining ring (40) is slidably positioned between the fixed retaining ring (41) and the flange tube (22).

5. The dual-chamber thermal storage combustion pipe connection device according to claim 2, characterized in that: The flange tube (22) is fixedly connected to one end of the scraper strip (50), and the other end of the scraper strip (50) is located in the rotating tube (2), and the scraper strip (50) is gap-fitted with the inner wall of the rotating tube (2).

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