Double-row chain for feeding chain conveyor of desorption tower

Abstract

A double-row chain for a feeding chain type conveyor of an analysis tower comprises a first chain and a second chain which are controlled by a driving motor of the feeding chain type conveyor of the analysis tower, the first chain and the second chain are parallel to each other and synchronously move to form the double-row chain, and the first chain and the second chain are both provided with bent attaching plates forming chain plates. Each bent attaching plate comprises a straight plate section and a horizontal plate section bent by 90 degrees relative to the straight plate section, the horizontal plate sections and the straight plate sections are integrally formed, and the bending directions of the horizontal plate sections of the bent attaching plates installed on the first chain and the second chain are opposite and both face the inner side of the double-row chain. Due to the fact that the bent attaching plates with the straight plate sections and the horizontal plate sections integrally formed are arranged, corrosion hidden danger of welding portions is eliminated, structural strength is enhanced, corrosion failure time is prolonged, the bent attaching plates of the double-row chain are opposite in bending direction and face the inner side, stress of the chain is balanced, abrasion caused by unbalance loading is reduced, and service life of the chain is prolonged. And the stability of synchronous movement is ensured.

Description

Technical Field

[0001] This utility model relates to the field of chain technology, and in particular to a double-row chain for a feed chain conveyor for a desorption tower. Background Technology

[0002] As per the instruction manual Figure 5 The conveyor belt for the activated carbon purification unit of the sintering flue gas at Baosteel (Zhanjiang) Ironmaking Plant, as shown, originally had a dry, moisture-free conveyor box with activated carbon moisture content below 6% and a slight negative pressure inside. Due to prolonged operation, the conveyor is now filled with sulfur-containing sintering flue gas. This flue gas condenses into dilute acid, which is highly corrosive. On-site observation reveals a humid operating environment, and a large amount of sulfur crystals are visible on the outer surface of the box. The chain inside the box has been in operation for approximately 8 months, and all visible parts of the chain show severe corrosion. Many bushings (parts between pins and rollers) have been damaged and detached. Specifically, the chain exhibits rapid elongation: the chain length has been shortened from once every 6-8 months to once a week. The double-row chains are connected by link 23, but lack anti-corrosion construction. Based on the on-site equipment conditions and observation of the disassembled chains, the main cause of chain elongation is corrosion wear at the various operating joints. This is a form of damage primarily caused by chemical corrosion, accompanied by mechanical wear. Generally, the wear during corrosion is moderate, but due to the corrosive effect, the wear will be accelerated and have serious consequences, especially in high-temperature or humid environments.

[0003] Existing analytical tower feed chain conveyors contain sulfur-containing gases within their chain housings. These gases condense to form dilute acid, which is corrosive. Furthermore, the bending plates of existing analytical tower feed chain conveyors are mostly welded structures, resulting in low structural strength and poor corrosion resistance at the welded areas, making them unsuitable for long-term operation. Therefore, a new analytical tower feed chain conveyor is needed that combines corrosion resistance with high structural strength. Utility Model Content

[0004] This invention provides a double-row chain for a feed chain conveyor of an analytical tower that is corrosion-resistant and has high structural strength.

[0005] A double-row chain for a feed chain conveyor of an analytical tower includes a first chain and a second chain controlled by a drive motor of the feed chain conveyor. The first and second chains move synchronously in parallel to each other to form a double-row chain. Both the first and second chains are provided with curved attachment plates that form chain plates. Each curved attachment plate includes a straight section and a horizontal section bent at 90 degrees relative to the straight section. The horizontal section is integrally formed with the straight section. The bending directions of the horizontal sections of the curved attachment plates installed on the first and second chains are opposite, and both face the inner side of the double-row chain. A chain connection gap is provided between the first and second chains. Each of the first and second chains is provided with rollers, and the axial spacing between the rollers forms the roller installation gap. The roller installation gap is greater than the chain connection gap. This invention ensures that there is no physical contact between the rollers and the connecting rods connecting the two rows of chains by setting the roller installation gap to be greater than the chain connection gap, avoiding additional wear or jamming caused by friction or collision during operation. If a roller fails due to corrosion or wear, a larger spacing can reduce its impact on adjacent rollers and the overall conveying efficiency. Meanwhile, the chain plate thickness has been adjusted from 9mm to 9.5mm. This adjustment not only increases the strength of the chain plate components but also extends the time before the chain plate fails due to corrosion.

[0006] The first chain includes a first outer link and a first inner link connected end-to-end. The first outer link includes a first externally curved plate with a different hole and a first circularly curved outer link plate, which are parallel to each other and connected by a first pin. A first roller is provided on the outer periphery of the first pin. The first inner link includes a first internally curved plate and a first inner link plate. Both the first externally curved plate with a different hole and the first internally curved plate are curved plate structures. The use of curved plate structures in both the first outer link and the first inner link eliminates welding points, comprehensively reducing the risk of corrosion and improving the overall structural strength. The first externally curved plate with a different hole and the first circularly curved outer link plate of the first outer link work together to distribute stress. The first outer link and the first inner link work together to ensure the reliability of the chain under high load and high corrosion environments.

[0007] The second chain includes a second outer link and a second inner link connected end-to-end. The second outer link includes a second externally curved plate with a different hole and a second externally curved plate with a round hole, which are parallel to each other and connected by a second pin. A second roller is provided on the outer circumference of the second pin. The second inner link includes a second internally curved plate and a second inner link plate. Both the second externally curved plate with a different hole and the second internally curved plate have curved plate structures. The radial height of the second roller is greater than that of the second internally curved plate and the second inner link plate. The protruding design of the second roller enables it to bear the main load during chain operation and, through the rolling contact between the roller and the track, evenly transfers the load to the track, reducing local stress concentration and improving the service life of the chain.

[0008] The chain connection spacing is formed by the first center line between the first externally curved plate with a different hole and the first externally curved chain plate with a round hole, and the second center line between the second externally curved plate with a different hole and the second externally curved chain plate with a round hole. The chain connection spacing is used to install the connecting rods that connect the first chain and the second chain. This invention, through the cooperation of the first and second center lines, strictly limits the connection spacing of the double-row chains, ensuring that the two rows of chains remain parallel and synchronized during movement. This prevents uneven material conveying and chain jamming caused by lag or offset on one side of the chain, improving the operational stability of the conveyor. Simultaneously, the spacing formed by the center lines ensures symmetrical installation of the connecting rods, resulting in uniform stress distribution on the double-row chains under load, reducing local stress concentration, and delaying mechanical fatigue and wear.

[0009] The roller installation spacing is formed by the cooperation of the first axial centerline of the first roller and the second axial centerline of the second roller. The roller installation spacing is used to control the size of the items conveyed by the rollers. This invention, through the roller spacing formed by the centerlines, ensures that the weight of the material is evenly distributed to adjacent rollers, reducing stress concentration at single points and preventing deformation or damage to the rollers due to localized overload. The rational design of the roller spacing can buffer the impact force of the material and protect the structural integrity of the chain under high load conditions.

[0010] The first roller consists of a first pin, a first sleeve, and a first locking pin. The first sleeve is fitted onto the first pin, which has a radially arranged connecting hole that engages with the first locking pin. The first locking pin includes a vertical section and a horizontal section, with a bent structure at the connection between the vertical and horizontal sections. The bending angle of the bent structure is greater than 30 degrees. This design, with a bending angle greater than 30 degrees, avoids sharp corners, reduces local stress concentration, delays crack propagation caused by corrosion or alternating loads, and extends the service life of the first locking pin. Simultaneously, the material of the first sleeve has been changed from 20CrMo to 20Cr13 (420), and the material of the first pin has been changed from 42CrMo to 20Cr13.

[0011] The second roller consists of a second pin, a second sleeve, and a second locking pin. The second sleeve is fitted onto the second pin, which has a radially arranged connecting hole that engages with the second locking pin. The second locking pin includes a vertical section and a horizontal section, with a bent structure at the connection between the vertical and horizontal sections. The bending angle of the bent structure is greater than 30 degrees. The rigid connection between its vertical and horizontal sections forms an anti-torsional fulcrum, restricting the rotational freedom of the second sleeve and the second pin, and reducing wear caused by friction. The material of the second sleeve has been changed from 20CrMo to 20Cr13 (420); the material of the second pin has been changed from 42CrMo to 20Cr13. 20Cr13 is a martensitic stainless steel material that can achieve high tensile strength and wear resistance through heat treatment. Tests conducted using the JW-60-SS salt spray tester, which meets the NSS neutral salt spray test conditions in the GB / T10125 standard "Artificial Atmosphere Corrosion Test - Salt Spray Test", show that: 42CrMo material parts exhibit pitting corrosion on their surface after 8 hours of testing, and 20Cr13 material parts exhibit pitting corrosion on their surface after 48 hours.

[0012] This invention ensures that there is no physical contact between the rollers and the connecting rods linking the two rows of chains by setting the roller installation spacing to be greater than the chain connection spacing, thus avoiding additional wear or jamming caused by friction or collision during operation. If a roller fails due to corrosion or wear, the larger spacing can reduce its impact on adjacent rollers and the overall conveying efficiency. At the same time, the chain plate thickness has been adjusted from the original 9mm to 9.5mm. This adjustment not only increases the strength of the chain plate components but also extends the time before the chain plate fails due to corrosion. Attached Figure Description

[0013] The following is in conjunction with the appendix Figure 1-5 Further explanation of this utility model:

[0014] Figure 1 This is a top view of the first chain of a double-row chain used in a feed chain conveyor for an analytical tower according to this utility model.

[0015] Figure 2 This is a schematic diagram of the main structure of the first chain of a double-row chain used in a feed chain conveyor for an analytical tower according to this utility model.

[0016] Figure 3 This is a top view of the second chain of a double-row chain used in a feed chain conveyor for an analytical tower according to this utility model.

[0017] Figure 4 This is a schematic diagram of a double-row chain bent plate structure for a feed chain conveyor for an analytical tower according to this utility model;

[0018] Figure 5 This is a schematic diagram of the feed chain conveyor structure of the analytical tower in the prior art. Detailed Implementation

[0019] The following is in conjunction with the appendix Figure 1-5 The specific implementation method further illustrates the technical solution of this patent.

[0020] A double-row chain for a feed chain conveyor of an analytical tower includes a first chain 9 and a second chain 11 controlled by a drive motor of the feed chain conveyor. The first chain 9 and the second chain 11 move in parallel and synchronously to form a double-row chain. Both the first chain 9 and the second chain 11 are provided with curved attachment plates that form chain plates. The curved attachment plate includes a straight plate section 22 and a horizontal plate section 21 that is bent at 90 degrees relative to the straight plate section 22. The horizontal plate section 21 is integrally formed with the straight plate section 22. The bending directions of the horizontal plate sections 21 of the curved attachment plates installed on the first chain 9 and the second chain 11 are opposite, and both face the inner side of the double-row chain. A chain connection gap is provided between the first chain 9 and the second chain 11. Both the first chain 9 and the second chain 11 are provided with rollers. The axial spacing between the rollers forms the roller installation gap. The roller installation gap is greater than the chain connection gap.

[0021] As a preferred structure, the first chain 9 includes a first outer chain link and a first inner chain link connected end to end. The first outer chain link includes a first externally curved attachment plate 3 and a first circular outer chain plate 4 that are parallel to each other and are connected by a first pin 2. The first pin 2 is provided with a first roller 7 on its outer periphery. The first inner chain link includes a first internally curved attachment plate 5 and a first inner chain plate 6. Both the first externally curved attachment plate 3 and the first internally curved attachment plate 5 are curved attachment plate structures.

[0022] Preferably, the second chain 11 includes a second outer chain link and a second inner chain link connected end to end. The second outer chain link includes a second externally curved attachment plate 13 with a different hole and a second external chain plate 12 with a round hole, which are parallel to each other and connected by a second pin 24. The second pin 24 is provided with a second roller 16 on its outer periphery. The second inner chain link includes a second internally curved attachment plate 15 and a second inner chain plate 14. Both the second externally curved attachment plate 13 with a different hole and the second internally curved attachment plate 15 are curved attachment plate structures.

[0023] As a preferred structural feature, the chain connection spacing is formed by the first center line 18 between the first externally bent plate with a different hole 3 and the first externally bent plate with a round hole 4, and the second center line 19 between the second externally bent plate with a different hole 13 and the second externally bent plate with a round hole 12. The chain connection spacing is used to install the connecting rod 24 that connects the first chain 9 and the second chain 11.

[0024] The preferred roller installation spacing is formed by the cooperation of the first axial center line 17 of the first roller 7 and the second axial center line 20 of the second roller 16. The roller installation spacing is used to control the size of the items conveyed by the rollers.

[0025] To further improve the corrosion resistance of the double-row chain, the first roller 7 is composed of a first pin 2, a first sleeve 8, and a first locking pin 1; the first sleeve 8 is sleeved on the first pin 2, and the first pin 2 is provided with a connecting hole in the radial direction, which is inserted and connected to the first locking pin 1; the first locking pin 1 includes a vertical section and a horizontal section, and the connection between the vertical section and the horizontal section is a bent structure with a bending angle greater than 30 degrees.

[0026] As a preferred structural feature, the second roller 16 is composed of a second pin 24, a second sleeve 25, and a second locking pin 27; the second sleeve 25 is sleeved on the second pin 24, and the second pin 24 is provided with a connecting hole in the radial direction, which is engaged with the second locking pin 27; the second locking pin 27 includes a vertical section and a horizontal section, and the connection between the vertical section and the horizontal section is a bent structure with a bending angle greater than 30 degrees.

[0027] The preferred embodiments of this patent have been described in detail above. However, this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.

Claims

1. A double-row chain for a feed chain conveyor for a desorption tower, comprising a first chain (9) and a second chain (11) controlled by a drive motor of the feed chain conveyor for the desorption tower, wherein the first chain (9) and the second chain (11) move in parallel and synchronously to form a double-row chain, characterized in that: The first chain (9) and the second chain (11) are both provided with bent plates that form chain plates. The bent plates include straight plate sections (22) and horizontal plate sections (21) that are bent at 90 degrees relative to the straight plate sections. The horizontal plate sections (21) and the straight plate sections (22) are integrally formed. The bending directions of the horizontal plate sections (21) of the bent plates installed on the first chain (9) and the second chain (11) are opposite, and both face the inner side of the double-row chain. There is a chain connection gap between the first chain (9) and the second chain (11). The first chain (9) and the second chain (11) are each provided with rollers. The axial spacing between the rollers forms the roller installation gap. The roller installation gap is greater than the chain connection gap.

2. The double-row chain for a feed chain conveyor of an analytical tower according to claim 1, characterized in that: The first chain (9) includes a first outer link and a first inner link connected end to end. The first outer link includes a first externally curved plate (3) and a first circular plate (4) that are parallel to each other. The two are connected by a first pin (2). The first pin (2) has a first roller (7) on its outer periphery. The first inner link includes a first internally curved plate (5) and a first inner link (6). The first externally curved plate (3) and the first internally curved plate (5) are both curved plate structures.

3. The double-row chain for a feed chain conveyor of an analytical tower according to claim 1, characterized in that: The second chain (11) includes a second outer chain link and a second inner chain link connected end to end. The second outer chain link includes a second external curved plate (13) with a different hole and a second round hole outer chain plate (12) that are parallel to each other. The two are connected by a second pin (24). The second pin (24) has a second roller (16) on its outer periphery. The second inner chain link includes a second internal curved plate (15) and a second inner chain plate (14). The second external curved plate (13) with a different hole and the second internal curved plate (15) are both curved plate structures.

4. The double-row chain for a feed chain conveyor of an analytical tower according to claim 1, characterized in that: The chain connection spacing is formed by the first center line (18) between the first external curved plate (3) and the first round hole external chain plate (4) and the second center line (19) between the second external curved plate (13) and the second round hole external chain plate (12). The chain connection spacing is used to install the connecting rod connecting the first chain (9) and the second chain (11).

5. The double-row chain for a feed chain conveyor of an analytical tower according to claim 1, characterized in that: The roller installation spacing is formed by the first axial center line (17) of the first roller (7) and the second axial center line (20) of the second roller (16).

6. The double-row chain for a feed chain conveyor of an analytical tower according to claim 2, characterized in that: The first roller (7) is composed of a first pin (2), a first sleeve (8) and a first locking pin (1); the first sleeve (8) is sleeved on the first pin (2), the first pin (2) is provided with a connecting hole in the radial direction, and the connecting hole is inserted and connected to the first locking pin (1); the first locking pin (1) includes a vertical section and a horizontal section, and the connection between the vertical section and the horizontal section is a bent structure with a bending angle greater than 30 degrees.

7. The double-row chain for a feed chain conveyor of an analytical tower according to claim 3, characterized in that: The second roller (16) is composed of a second pin (24), a second sleeve (25) and a second locking pin (27); the second sleeve (25) is sleeved on the second pin (24), the second pin (24) is provided with a connecting hole in the radial direction, and the connecting hole is inserted and connected to the second locking pin (27); the second locking pin (27) includes a vertical section and a horizontal section, and the connection between the vertical section and the horizontal section is a bent structure, the bending angle of the bent structure is greater than 30 degrees.

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