Device and method for constructing staggered joint type heat preservation layer of furnace tube of ethylene cracking furnace

Abstract

The invention relates to a device and a method for constructing a staggered joint type insulating layer of a furnace tube of an ethylene cracking furnace. The construction device is used for coating the surface of the furnace tube with a plurality of layers of fiber felts in a staggered joint mode and comprises a first arc-shaped plate and a second arc-shaped plate with the ends hinged to each other, the ends, away from the hinged point, of the first arc-shaped plate and the second arc-shaped plate are fixedly connected with mounting plates, and the mounting plates are parallel to the axis of the first arc-shaped plate / the second arc-shaped plate; limiting pieces used for fixing the two ends of the fibrofelt are arranged on the mounting plate, and the mounting plate is used for wrapping the fibrofelt on the surface of the furnace tube in the rotating process of the first arc-shaped plate and the second arc-shaped plate. The construction device is further provided with a fixing mechanism used for fixing the fiber felt. The traditional operation mode of manual threading and manual fiber felt tensioning is thoroughly abandoned, ground preparation and mechanical coating are achieved, and the labor intensity and potential safety hazards are greatly reduced.

Description

Technical Field

[0001] This invention belongs to the technical field of furnace tube insulation construction equipment, specifically relating to a construction device and method for a staggered insulation layer of ethylene cracking furnace tubes. Background Technology

[0002] Ethylene cracking furnaces are core equipment in the petrochemical industry. Their furnace tubes operate at high temperatures for extended periods, requiring insulation with high-performance ceramic fiber felt to reduce heat loss and ensure safe production. Traditional furnace tube insulation construction is entirely manual: workers must pass one end of a rolled ceramic fiber felt through the top of the furnace tube, then pull it out from the bottom, forming a loop. They then pull the two ends of the felt taut to ensure a tight fit while simultaneously securing it with stainless steel wire. This process needs to be repeated to achieve the required multi-layer, staggered-joint, and interlayer overlapping techniques.

[0003] The above-mentioned traditional methods have significant drawbacks: 1. They are extremely labor-intensive and have low construction efficiency; 2. The tightness of the fiber felt and the tightness of the binding depend on the worker's experience, and the quality is not easy to be uniform; 3. The binding of the wire also requires manual wrapping and tightening, which is cumbersome.

[0004] Therefore, there is an urgent need for a special device and method that can reduce labor intensity and improve construction efficiency and quality consistency. Summary of the Invention

[0005] The purpose of this invention is to provide a construction device and method for a staggered insulation layer for ethylene cracking furnace tubes in order to solve the problems mentioned in the background art.

[0006] The present invention achieves the above objectives through the following technical solutions: A construction device for a staggered insulation layer on ethylene cracking furnace tubes is disclosed, used to cover the surface of the furnace tubes with several layers of fiber felt in a staggered manner. The device includes a first arc-shaped plate and a second arc-shaped plate hinged at their ends. An mounting plate is fixedly connected to the end of each arc-shaped plate away from its hinge point. The mounting plate is parallel to the axis of the first / second arc-shaped plate. The mounting plate is provided with limiting members for fixing both ends of the fiber felt. The mounting plate is used to cover the surface of the furnace tube with fiber felt during the rotation of the first and second arc-shaped plates. The construction device is also equipped with a fixing mechanism for fixing the fiber felt.

[0007] Preferably, the fixing mechanism includes two fixing modules respectively disposed along the length of the mounting plate, and the fixing module includes fixing subunits respectively disposed at corresponding positions on the two mounting plates; The fixed subunit includes a semi-cylindrical track fixedly mounted on the mounting plate, a semi-cylindrical rotor rotatably mounted inside the semi-cylindrical track, a drive motor fixedly mounted on the semi-cylindrical track, a gear fixedly mounted on the output shaft end of the drive motor, and a switch mounted on the first arc plate / second arc plate for controlling the drive motor. The semi-cylindrical rotor has holes for passing through iron wires, and the outer ring of the semi-cylindrical rotor has several tooth grooves corresponding to gears. The semi-cylindrical tracks on the two mounting plates form a complete cylindrical track, and the semi-cylindrical rotors on the two mounting plates form a complete cylinder and can rotate within the cylindrical track.

[0008] Preferably, the limiting member has a conical structure.

[0009] Preferably, the mounting plate has a through hole, and the limiting member is movably installed at the through hole; The drive motor also has a second output shaft, on which a screw is fixedly mounted. A sleeve is movably fitted around the outer ring of the screw. The sleeve is threadedly connected to the screw and fixedly connected to a limiting member. While tightening the wire, the drive motor causes the limiting member to disengage from the fiber felt.

[0010] Preferably, a pulley is rotatably mounted on the first arc-shaped plate, and a connecting rope is movably arranged along the surface of the first arc-shaped plate; One end of the connecting rope is fixedly connected to a magnet, which is used to attract the iron block of the second arc-shaped plate; The other end of the connecting rope passes over a pulley and is connected to an impact mechanism for striking the end of the wire.

[0011] Preferably, the impact mechanism includes two impact blocks movably mounted on a mounting plate connected to the first arc-shaped plate, and a reset spring disposed on the mounting plate for resetting the impact blocks.

[0012] Preferably, the mounting plate is provided with two mounting slots, the reset spring is disposed in the mounting slot, and the impact block is movably mounted in the mounting slot.

[0013] Preferably, the impact block has an arc-shaped chamfer.

[0014] A method for constructing a staggered insulation layer for ethylene cracking furnace tubes using the staggered insulation layer construction device described in any one of the above claims includes the following steps: S1: Cut the fiber felt and wire into sections according to the required length; S2: Rotate the first and second arc plates to move the two mounting plates on the first and second arc plates away from each other, and use the limiting parts to fix the two ends of the fiber felt, thus fixing the fiber felt to the first and second arc plates; S3: Place the middle part of the fiber felt on the surface of the furnace tube, and move the No. 1 arc plate and the No. 2 arc plate away from the user so that the two mounting plates are close to each other, so that the fiber felt is covered on the surface of the furnace tube; S4: Secure the fiber felt using a fixing mechanism; S5: Repeat the covering process several times on the surface of the fiber felt that has just been covered, with the seams of the adjacent fiber felt layers staggered.

[0015] The beneficial effects of this invention are as follows: 1. This invention completely eliminates the traditional manual threading and tensioning of fiber felt, replacing it with ground preparation and mechanical wrapping, which greatly reduces labor intensity and safety hazards.

[0016] 2. This invention innovatively integrates the two processes of fiber felt covering and wire binding into a single action of the same device, and replaces manual wire twisting with electric wire twisting, which can improve construction efficiency by several times.

[0017] 3. The mechanical wrapping of this invention ensures uniform tension of the felt material, and the electric wire twisting ensures consistent binding torque for each wire, fundamentally improving the uniformity and reliability of the insulation layer construction quality.

[0018] 4. This invention achieves rapid and non-destructive separation of the device from the workpiece through an automatic unhooking mechanism; and automatically handles the raised ends of the wires through an end-flattening mechanism, providing a flat base surface for the next layer of construction and ensuring the overall quality of multi-layer insulation.

[0019] 5. This invention integrates handrails and a control system, allowing the operator to complete all operations from one side of the furnace tube. The process is standardized, reducing the skill requirements for workers. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 yes Figure 1 Enlarged view of point A in the middle; Figure 3 yes Figure 1 Enlarged view of point B in the middle; Figure 4 This is a schematic diagram of the second-view structure of the present invention; Figure 5 yes Figure 4 Enlarged view of point C; Figure 6 This is a schematic diagram illustrating the working principle of the present invention.

[0021] In the diagram: 1. Arc-shaped plate No. 1; 2. Arc-shaped plate No. 2; 3. Mounting plate; 4. Limiting component; 5. Semi-cylindrical track; 6. Semi-cylindrical rotor; 7. Drive motor; 8. Gear; 9. Hole; 10. Through hole; 11. Screw; 12. Sleeve; 13. Pulley; 14. Connecting rope; 15. Magnet; 16. Impact block; 17. Return spring; 18. Mounting groove; 19. Arc-shaped chamfer. Detailed Implementation

[0022] The present application will now be described in further detail. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0023] Example 1 like Figure 1-6 As shown, a staggered insulation layer construction device for ethylene cracking furnace tubes is used to cover several layers of fiber felt on the surface of the furnace tubes in a staggered manner. It includes a first arc plate 1 and a second arc plate 2 with their ends hinged together. An mounting plate 3 is fixedly connected to the end of each arc plate 1 and arc plate 2 away from its hinge point. The mounting plate 3 is parallel to the axis of the first arc plate 1 / arc plate 2. The mounting plate 3 is provided with limiting members 4 for fixing both ends of the fiber felt. The mounting plate 3 is used to cover the surface of the furnace tube with fiber felt during the rotation of the first arc plate 1 and arc plate 2. The construction device is also equipped with a fixing mechanism for securing the fiber felt.

[0024] It should be noted that all necessary supplies should be prepared before construction begins, including: Ceramic fiber cotton felt (resistant to 1400℃), 25mm thick, density 128kg / m³ 3 .

[0025] Stainless steel wire, 0.9mm in diameter.

[0026] When using, first cut the fiber felt and iron wire into sections according to the required length. The length of the iron wire should be slightly longer than the corresponding length of the fiber felt. Considering that the fiber felt has thickness, the length of the outer fiber felt should be gradually increased (according to the actual situation).

[0027] Next, rotate arc plate 1 and arc plate 2 so that the two mounting plates 3 on arc plate 1 and arc plate 2 move away from each other. Use the limiting piece 4 to fix the two ends of the fiber felt, thus fixing the fiber felt onto arc plate 1 and arc plate 2.

[0028] Then, attach the middle part of the fiber felt to the surface of the furnace tube, move the No. 1 arc plate 1 and the No. 2 arc plate 2 away from the user, and then bring the two mounting plates 3 closer to each other so that the fiber felt is covered on the surface of the furnace tube. The two mounting plates 3 on the No. 1 arc plate 1 and the No. 2 arc plate 2 are in contact with each other on the other side of the furnace tube.

[0029] Next, the fiber felt is secured using a fixing mechanism. The fixing mechanism uses wire to bind the fiber felt and prevent it from shifting.

[0030] Next, repeat the covering process several times on the surface of the previously covered fiber felt, staggering the seams between adjacent layers. Four layers of fiber felt are applied, with staggered seams within the same layer and overlapping seams between layers.

[0031] At the end, simply remove the No. 1 curved plate and the No. 2 curved plate.

[0032] The fiber felt is wrapped around the furnace tube surface by using the No. 1 arc plate 1 and the No. 2 arc plate 2. This method eliminates the need for workers to pass the ends of the fiber felt through the top of the furnace tube and then pull it out from the bottom, and then tie it with wire while tightening both ends of the fiber felt. This makes the construction of the fiber felt easy and labor-saving.

[0033] Preferably, the fixing mechanism in this embodiment includes two fixing modules respectively disposed along the length of the mounting plate 3. Each fixing module includes fixing sub-units respectively disposed at corresponding positions on the two mounting plates 3. The two fixing modules are located at both ends of the mounting plate 3, corresponding to the length sides of the fiber felt. The two fixing modules include a total of four fixing sub-units, respectively corresponding to the four corners of the rectangular fiber felt, so that the two wires can be tied to both ends of the fiber felt during binding.

[0034] The fixed subunit includes a semi-cylindrical track 5 fixedly mounted on the mounting plate 3, a semi-cylindrical rotor 6 rotatably mounted within the semi-cylindrical track 5, a drive motor 7 fixedly mounted on the semi-cylindrical track 5, a gear 8 fixedly mounted on the output shaft end of the drive motor 7, and a switch on the first arc plate 1 and the second arc plate 2 for controlling the drive motor 7. A battery is also provided on the mounting plate 3 to power the drive motor 7. For ease of use, handrails are fixedly mounted on both the first arc plate 1 and the second arc plate 2, and the switch is located on the handrail.

[0035] The semi-cylindrical rotor 6 has holes 9 for passing through iron wires. The outer ring of the semi-cylindrical rotor 6 has several tooth grooves corresponding to the gear 8. The semi-cylindrical tracks 5 on the two mounting plates 3 form a complete cylindrical track. The semi-cylindrical rotors 6 on the two mounting plates 3 form a complete cylinder and can rotate inside the cylindrical track.

[0036] It should be noted that the two ends of the iron wire are passed through the holes 9 of the two semi-cylindrical rotors 6 (corresponding to the two fixed sub-units) on the same fixed module, and the fiber felt is located between the iron wire and the furnace tube to ensure that the iron wire can cover the fiber felt.

[0037] After the fiber felt and iron wire are simultaneously wrapped around the surface of the furnace tube, the drive motor 7 is started using a switch control. The drive motor 7 drives the gear 8 to rotate, causing the semi-cylindrical rotor 6 to rotate within the cylindrical track. During the rotation of the semi-cylindrical rotor 6, the two ends of the same iron wire are wrapped together, thus tightening the fiber felt. Because the ends of the iron wire will knot during the winding process, the ends of the iron wire are gradually pulled out from the holes 9 of the semi-cylindrical rotor 6. When the ends of the iron wire are separated from the semi-cylindrical rotor 6, the drive motor 7 stops. At this time, the first arc plate 1 and the second arc plate 2 can be removed from the furnace tube normally. The fast tightening of the iron wire by the fixing mechanism replaces manual operation and greatly improves work efficiency.

[0038] Preferably, the limiting member 4 has a conical structure. By using the limiting member 4 to insert into both ends of the fiber felt, the fiber felt can be installed quickly.

[0039] Example 2 While the limiting member 4 secures the end of the fiber felt, it also makes it difficult for the limiting member 4 to detach from the fiber felt, thus making it difficult for the first arc plate 1 and the second arc plate 2 to detach from the fiber felt. To further achieve automatic unhooking of the limiting member 4 and make the removal action smoother, unlike Embodiment 1, the mounting plate 3 in this embodiment is provided with a through hole 10, and the limiting member 4 is movably installed at the through hole 10; The drive motor 7 also has a second output shaft, on which a screw 11 is fixedly mounted. A sleeve 12 is movably fitted around the outer ring of the screw 11. The sleeve 12 is threadedly connected to the screw 11. The sleeve 12 is fixedly connected to the limiting member 4. While tightening the wire, the drive motor 7 drives the limiting member 4 to disengage from the fiber felt.

[0040] It should be noted that when the drive motor 7 drives the gear 8 to rotate, it simultaneously drives the second output shaft to rotate, which in turn drives the screw 11 to rotate. Because the sleeve 12 is fixedly connected to the limiting member 4, the limiting member 4 restricts the rotation of the sleeve 12, so the sleeve 12 can only move along the axial direction of the screw 11. During the movement of the sleeve 12, the limiting member 4 moves synchronously, causing the limiting member 4 to disengage from the fiber felt, thus allowing the first arc plate 1 and the second arc plate 2 to be easily removed from the fiber felt.

[0041] Example 3 Because the wire has a spiral head after being tightened, this head will affect the installation of the next insulation layer. Therefore, unlike Embodiment 2, in this embodiment, a pulley 13 is rotatably mounted on the first arc plate 1, and a connecting rope 14 is movably arranged along the surface of the first arc plate 1; One end of the connecting rope 14 is fixedly connected to a magnet 15, which is used to attract the iron block of the second arc plate 2; The other end of the connecting rope 14 is connected to an impact mechanism for striking the end of the wire after passing over the pulley 13.

[0042] The impact mechanism includes two impact blocks 16 movably mounted on a mounting plate 3 connected to the first arc plate 1, and a return spring 17 provided on the mounting plate 3 for resetting the impact blocks 16.

[0043] The mounting plate 3 has two mounting slots 18, the reset spring 17 is located in the mounting slot 18, and the impact block 16 is movably mounted in the mounting slot 18.

[0044] Preferably, the impact block 16 has an arc-shaped chamfer 19. When the impact block 16 impacts the head of the wire, the arc-shaped chamfer 19 can guide the head, which helps the head to rotate relative to its body and conform to the surface of the fiber felt.

[0045] It should be noted that when the two mounting plates 3 on the first arc plate 1 and the second arc plate 2 approach each other, the first arc plate 1 and the second arc plate 2 rotate along their hinge point, causing the connecting rope 14 to be tightened. This causes the connecting rope 14 to drive the impact block 16 to move, and the impact block 16 presses the return spring 17 during the movement. The magnet 15 has a large magnetic attraction force, and the magnet 15 remains attracted to the iron block even when the first arc plate 1 and the second arc plate 2 are tightened (when the two mounting plates 3 are in contact).

[0046] After the wire head is tightened, the magnet 15 is manually removed from the iron block. Under the action of the return spring 17, the impact block 16 impacts the wire head, so that the wire head can change from a standing state to a state of being flat against the fiber felt surface, thus enabling the installation of the next insulation layer.

[0047] Example 4 A method for constructing a staggered insulation layer for ethylene cracking furnace tubes includes the following steps: S1: Cut the fiber felt and wire into sections according to the required length; S2: Rotate the first arc plate 1 and the second arc plate 2 so that the two mounting plates 3 on the first arc plate 1 and the second arc plate 2 move away from each other. Use the limiting piece 4 to fix the two ends of the fiber felt, and fix the fiber felt on the first arc plate 1 and the second arc plate 2. S3: Place the middle part of the fiber felt on the surface of the furnace tube, move the No. 1 arc plate 1 and the No. 2 arc plate 2 away from the user, and move them close to the two mounting plates 3 so that the fiber felt is covered on the surface of the furnace tube; S4: Secure the fiber felt using a fixing mechanism; S5: Repeat the covering process several times on the surface of the fiber felt that has just been covered, with the seams of the adjacent fiber felt layers staggered.

[0048] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A construction device for a staggered insulation layer on ethylene cracking furnace tubes, used to cover the surface of the furnace tubes with several layers of fiber felt in a staggered manner, characterized in that... The device includes a first arc plate (1) and a second arc plate (2) hinged together at their ends. Each of the first arc plate (1) and the second arc plate (2) is fixedly connected to a mounting plate (3) at the end away from its hinge point. The mounting plate (3) is parallel to the axis of the first arc plate (1) and the second arc plate (2). The mounting plate (3) is provided with limiting members (4) for fixing the two ends of the fiber felt. The mounting plate (3) is used to cover the surface of the furnace tube with the fiber felt during the rotation of the first arc plate (1) and the second arc plate (2). The construction device is also equipped with a fixing mechanism for fixing the fiber felt.

2. The construction device for the staggered joint insulation layer of ethylene cracking furnace tubes according to claim 1, characterized in that... The fixing mechanism includes two fixing modules respectively disposed along the length of the mounting plate (3), and the fixing module includes fixing sub-units respectively disposed at corresponding positions on the two mounting plates (3); The fixed subunit includes a semi-cylindrical track (5) fixed on the mounting plate (3), a semi-cylindrical rotor (6) rotatably disposed within the semi-cylindrical track (5), a drive motor (7) fixed on the semi-cylindrical track (5), a gear (8) fixed on the output shaft end of the drive motor (7), and a switch disposed on the first arc plate (1) / second arc plate (2) for controlling the drive motor (7); The semi-cylindrical rotor (6) is provided with holes (9) for passing through iron wires. The outer ring of the semi-cylindrical rotor (6) is provided with several tooth grooves corresponding to the gears (8). The semi-cylindrical tracks (5) on the two mounting plates (3) form a complete cylindrical track. The semi-cylindrical rotors (6) on the two mounting plates (3) form a complete cylinder and can rotate in the cylindrical track.

3. The construction device for the staggered joint insulation layer of ethylene cracking furnace tubes according to claim 2, characterized in that... The limiting member (4) has a conical structure.

4. The construction device for the staggered joint insulation layer of ethylene cracking furnace tubes according to claim 3, characterized in that... The mounting plate (3) is provided with a through hole (10), and the limiting member (4) is movably installed at the through hole (10); The drive motor (7) also has a second output shaft, on which a screw (11) is fixedly mounted. A sleeve (12) is movably fitted around the outer ring of the screw (11). The sleeve (12) is threadedly connected to the screw (11). The sleeve (12) is fixedly connected to the limiting member (4). While tightening the wire, the drive motor (7) drives the limiting member (4) to disengage from the fiber felt.

5. The construction device for the staggered joint insulation layer of ethylene cracking furnace tubes according to claim 4, characterized in that... A pulley (13) is rotatably mounted on the first arc-shaped plate (1), and a connecting rope (14) is movably arranged along its surface on the first arc-shaped plate (1). One end of the connecting rope (14) is fixedly connected to a magnet (15), which is used to attract the iron block of the second arc plate (2); The other end of the connecting rope (14) passes over the pulley (13) and is connected to an impact mechanism for striking the end of the wire.

6. The construction device for the staggered joint insulation layer of ethylene cracking furnace tubes according to claim 5, characterized in that... The impact mechanism includes two impact blocks (16) movably mounted on a mounting plate (3) connected to the first arc plate (1), and a reset spring (17) provided on the mounting plate (3) for resetting the impact blocks (16).

7. The construction device for the staggered joint insulation layer of ethylene cracking furnace tubes according to claim 6, characterized in that... The mounting plate (3) is provided with two mounting slots (18), the reset spring (17) is located in the mounting slot (18), and the impact block (16) is movably installed in the mounting slot (18).

8. The construction device for the staggered joint insulation layer of ethylene cracking furnace tubes according to claim 7, characterized in that... The impact block (16) has an arc-shaped chamfer (19).

9. A method for constructing a staggered insulation layer for ethylene cracking furnace tubes using the staggered insulation layer construction device according to any one of claims 1-8, characterized in that... This includes the following steps: S1: Cut the fiber felt and wire into sections according to the required length; S2: Rotate the first arc plate (1) and the second arc plate (2) so that the two mounting plates (3) on the first arc plate (1) and the second arc plate (2) move away from each other. Use the limiting piece (4) to fix the two ends of the fiber felt and fix the fiber felt on the first arc plate (1) and the second arc plate (2); S3: Place the middle part of the fiber felt on the surface of the furnace tube, and move the No. 1 arc plate (1) and the No. 2 arc plate (2) away from the user, so that the two mounting plates (3) are close to each other, so that the fiber felt is covered on the surface of the furnace tube; S4: Secure the fiber felt using a fixing mechanism; S5: Repeat the covering process several times on the surface of the fiber felt that has just been covered, with the seams of the adjacent fiber felt layers staggered.

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