Circulating air channel device

Abstract

The utility model provides a circulating air channel device. The circulating air channel device comprises a circulating air channel welding assembly, a heat preservation cotton assembly, a sealing plate assembly, a door plate, a ratchet block, a protection chain and a locking bolt. An air inlet and an air outlet are formed in the circulating air duct welding assembly; the heat preservation cotton assembly uniformly covers the outer side of the circulating air duct welding assembly; the sealing plate assembly wraps the heat preservation cotton assembly and is fixed to the circulating air duct welding assembly. A sliding rail is installed on the outer side of the air inlet, and the door plate is arranged on the outer side of the air inlet and connected with the sliding rail. According to the method, the safety of an operator is considered preferentially in design. The sliding rail is arranged on the outer side of the air inlet, and the door plate can be adjusted under the condition that the door plate does not make direct contact with high-temperature components. By means of the design, the risk that an operator is scalded due to high temperature is avoided, and operation is safer and more reliable. In addition, the design of the protective chain further prevents the door plate from falling off accidentally, and the stability of the whole structure is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of road construction equipment, and particularly relates to an in-situ hot recycling circulating air duct device for asphalt pavement aiming to improve safety and operation efficiency. Background Technique

[0002] The in-situ hot recycling technology for asphalt pavement is an efficient and environmentally friendly road repair method, which is widely used in the maintenance and recycling projects of old pavements. This technology heats the old asphalt pavement and mixes it with new materials for paving to reshape the pavement structure. The whole process requires precise heat control to ensure uniform heating and mixing of asphalt materials, so as to achieve the ideal recycling effect. In this process, the recycling of hot air is a key link to ensure heating efficiency and energy conservation and emission reduction.

[0003] The circulating air duct is an important part of the hot recycling equipment. It is usually installed on the heating wall, with one end connected to the air inlet of the fan and the other end connected to the hot circulation system inside the equipment. The main function of the circulating air duct is to guide the hot air inside the equipment to the heating area to uniformly heat the asphalt pavement. A cold air door is usually set on this duct to adjust the amount of cold air entering the heating wall, and then control the temperature and flow rate of the hot air.

[0004] In the prior art, the opening adjustment of the cold air door mainly relies on manual operation. The operator needs to directly contact the cold air door to adjust the opening. After adjusting to the ideal position, multiple fastening bolts are tightened to fix the air door to prevent the air door from sliding due to vibration or thermal expansion and contraction in the high-temperature environment. This manual adjustment method has obvious deficiencies:

[0005] Safety hazard: Since the surface temperatures of the circulating air duct and the heating wall are relatively high, it is easy for the operator to be scalded when directly contacting the cold air door or its surrounding components. Especially during long-term operation or in a high-temperature environment, this risk is particularly prominent.

[0006] Complicated operation: In order to keep the cold air door in a stable position, multiple fastening bolts usually need to be operated. This not only increases the operation steps, but also may cause deviation in the opening of the cold air door due to insecure fixation, affecting the heating effect and recycling quality of the equipment.

[0007] Low adjustment accuracy: The opening adjustment of the cold air door mainly depends on the experience of the operator and lacks an accurate positioning system. This adjustment method is easily affected by human factors and is difficult to ensure the consistency of each operation, affecting the stability of the hot recycling process.

[0008] Low work efficiency: Due to the complexity and tediousness of manual operation, the work efficiency of adjusting the cold air door is low. Especially in the case of frequent adjustment, this operation method is difficult to meet the requirements of modern production for efficiency. Summary of the Utility Model

[0009] In view of the above existing technical deficiencies, the purpose of the present utility model is to provide a circulating air duct device, which improves operation safety, simplifies the operation process, ensures adjustment accuracy, and meets the requirements of modern production for efficient and precise operation.

[0010] To achieve the above purpose, the present utility model adopts the following technical solutions:

[0011] A circulating air duct device includes a circulating air duct welding assembly, a thermal insulation cotton assembly, a sealing plate assembly, a door panel, a ratchet block, a protective chain, and a locking bolt; an air inlet and an air outlet are provided on the circulating air duct welding assembly;

[0012] The thermal insulation cotton assembly is evenly covered on the outside of the circulating air duct welding assembly; the sealing plate assembly is wrapped outside the thermal insulation cotton assembly and fixed on the circulating air duct welding assembly; a slide rail is installed outside the air inlet, the door panel is placed outside the air inlet and connected to the slide rail; the locking bolt is rotatably installed on the slide rail, and the position of the door panel at the air inlet is fixed by tightening the locking bolt; one end of the protective chain is fixed on the circulating air duct welding assembly, and the other end is fixed on the door panel; the ratchet block is placed on one side of the air inlet and pivotally installed on the sealing plate assembly; a card slot adapted to the ratchet block is provided on the door panel.

[0013] Preferably, there are two air inlets, namely cold air door I and cold air door II; cold air door I is placed on the end face of the circulating air duct welding assembly opposite to the air outlet; cold air door II is placed on the end face between the air outlet and cold air door I of the circulating air duct welding assembly.

[0014] Preferably, there are four slide rails; two of the four slide rails are in a group, and each group of slide rails is respectively arranged on both sides of cold air door I and cold air door II.

[0015] Preferably, a first chain hanging plate is fixedly arranged on two of the adjacent slide rails; one end of the protective chain is fixed on the first chain hanging plate.

[0016] Preferably, two second chain hanging plates are fixedly arranged on the door panel, one of the chain hanging plates is fixed on the upper end face of the door panel, and the other chain hanging plate is fixed at the upper middle position of the outer facade of the door panel; the other end of the protective chain is fixed on one of the second chain hanging plates.

[0017] Preferably, a vertical plate is fixedly arranged on the outer facade of the door panel, a strip plate is fixedly arranged on the vertical plate, a plurality of ratchets are arranged at equal intervals on the strip plate, and the card slot is located between two adjacent ratchets.

[0018] Preferably, a vertical shaft and a stop block are fixedly arranged on the sealing plate assembly, the ratchet block is pivotally mounted on the vertical shaft, and the lower end surface of the ratchet block abuts against the upper end surface of the stop block.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] In the design of this application, the safety of the operator is given priority. By arranging a slide rail outside the air inlet, the door panel can be adjusted without directly contacting high-temperature components. This design not only avoids the risk of the operator being scalded by high temperature, but also makes the operation safer and more reliable. In addition, the design of the protective chain further prevents the door panel from accidentally falling off and enhances the stability of the overall structure.

[0021] The adjustment of the traditional cold air door relies on manually tightening multiple bolts to fix the position, and the operation process is both cumbersome and time-consuming. By adopting the combined design of the ratchet block and the slide rail in the present utility model, the position adjustment and fixation of the door panel become more convenient. The ratchet block can automatically snap into the corresponding card slot, eliminating the need for the operator to manually fix multiple bolts, greatly simplifying the operation process, reducing the adjustment time, and improving the working efficiency of the equipment.

[0022] This application realizes the precise adjustment of the opening degree of the door panel through the precise cooperation of the ratchet block and the card slot. Compared with the adjustment method relying on manual experience, this mechanical structure can ensure that the opening degree of each adjustment is consistent, avoiding human errors and ensuring the stability of the heating effect and regeneration quality of the equipment. In addition, the setting of the locking bolt further fixes the position of the door panel to prevent sliding or deviation during long-term operation.

[0023] The design of the circulating air channel device not only focuses on the convenience of operation, but also pays attention to the long-term durability of the equipment. The double protection of the sealing plate assembly and the heat preservation cotton assembly effectively reduces the influence of the external environment on the internal structure of the equipment and extends the service life of the equipment. The design of the vertical shaft and the stop block in the sealing plate assembly ensures the stable operation of the ratchet block and further improves the stability of the entire system.

[0024] Modern production requires that equipment has high-efficiency and high-precision operation capabilities. The circulating air channel device provided by the present utility model not only greatly improves the adjustment efficiency of the cold air door, but also ensures the accuracy of the operation through mechanized design, perfectly meeting the requirements of modern production lines for efficient and precise operation. The equipment does not require frequent manual intervention during use, reducing both labor costs and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the present utility model;

[0026] Figure 2It is a schematic structural diagram of the circulating air duct welding assembly in the present utility model;

[0027] Figure 3 It is a schematic structural diagram of the door panel in the present utility model;

[0028] Figure 4 It is a schematic structural diagram of the ratchet block in the present utility model.

[0029] Wherein:

[0030] 1. Sealing plate assembly; 2. Air outlet; 3. Ratchet block; 4. Door panel; 41. Second chain hanging plate; 42. Vertical plate; 43. Strip plate; 5. Protective chain; 6. Air inlet; 7. Slide rail; 8. Locking bolt; 9. Circulating air duct welding assembly; 10. Vertical shaft; 11. Stopper; 12. Cold air door II; 13. First chain hanging plate; 14. Cold air door I. Specific embodiments

[0031] The present utility model will be further described below with reference to the accompanying drawings.

[0032] As Figures 1 to 4 shown, a circulating air duct device includes a circulating air duct welding assembly 9, a heat insulation cotton assembly, a sealing plate assembly 1, a door panel 4, a ratchet block 3, a protective chain 5, and a locking bolt 8; the circulating air duct welding assembly 9 is the main part of the whole structure, made of heat-resistant and corrosion-resistant materials, and forms a continuous channel inside for the circulating flow of hot air; an air inlet 6 and an air outlet 2 are provided on the circulating air duct welding assembly 9, the air inlet 6 is used to suck in external air or cold air provided by the cold air door, and the air outlet 2 discharges the heated hot air into the heating wall or other heating areas;

[0033] The thermal insulation cotton assembly is closely attached to the outside of the circulating air duct welding assembly 9 and is made of highly efficient thermal insulation materials to reduce heat dissipation and improve the thermal efficiency of the system. The thermal insulation cotton not only has good thermal insulation performance but also should have certain fire and moisture-proof capabilities to ensure the stable operation of the equipment in harsh environments; the sealing plate assembly 1 is wrapped around the outside of the thermal insulation cotton assembly and fixed to the circulating air duct welding assembly 9, which not only plays a role in aesthetics and protection but also ensures the stability and tightness of the entire structure. Necessary openings and installation positions are reserved on the sealing plate assembly 1 for installing components such as the slide rail 7 and the ratchet block 3; the door panel 4 is a key component for adjusting the cold air volume and is made of lightweight high-temperature-resistant materials. A slide rail 7 is installed on the outside of the air inlet 6, the door panel 4 is placed on the outside of the air inlet 6 and connected to the slide rail 7, and the door panel 4 can slide horizontally along the slide rail 7 to achieve the sliding opening and closing of the air inlet 6; the locking bolt 8 is rotatably installed on the slide rail 7, and the door panel 4 is fixed at a specified position by rotating the locking bolt 8; one end of the protective chain 5 is fixed to the circulating air duct welding assembly 9, and the other end is fixed to the door panel 4, which is used to pull the door panel 4 to open and close, and at the same time can prevent the door panel 4 from accidentally falling off in case of emergency, enhancing safety; the ratchet block 3 is placed on one side of the air inlet 6 and is pivotally installed on the sealing plate assembly 1; a card slot adapted to the ratchet block 3 is provided on the door panel 4, and the initial positioning of the position of the door panel 4 is achieved through the cooperation of the ratchet and the card slot, which is convenient for the subsequent operation of the locking bolt 8.

[0034] In this embodiment, there are two air inlets 6, namely the cold air door Ⅰ14 and the cold air door Ⅱ12; the cold air door Ⅰ14 is placed on the end face of the circulating air duct welding assembly 9 opposite to the air outlet 2; the cold air door Ⅱ12 is placed on the end face between the air outlet 2 and the cold air door Ⅰ14 of the circulating air duct welding assembly 9. The cold air door Ⅰ14 and the cold air door Ⅱ12 are located at different positions of the circulating air duct welding assembly 9 to flexibly adjust the air supply volume; specifically: the cold air door Ⅰ14 is usually located on the end face opposite to the air outlet 2 for main air supply; the cold air door Ⅱ12 is located on the end face between the air outlet 2 and the cold air door Ⅰ14 for auxiliary adjustment.

[0035] In this embodiment, there are four slide rails 7; two of the four slide rails 7 are in a group, and each group of slide rails 7 is respectively arranged on both sides of the cold air door Ⅰ14 and the cold air door Ⅱ12.

[0036] In this embodiment, the first chain hanging plate 13 is fixedly arranged on two of the adjacent slide rails 7; one end of the protective chain 5 is fixed to the first chain hanging plate 13.

[0037] In this embodiment, two second chain hanging plates 41 are fixedly arranged on the door panel 4, one of the chain hanging plates is fixed on the upper end face of the door panel 4, and the other chain hanging plate is fixed at the upper middle position of the outer facade of the door panel 4; the other end of the protective chain 5 is fixed to one of the second chain hanging plates 41.

[0038] In this embodiment, a vertical plate 42 is fixedly arranged on the outer vertical surface of the door panel 4, a strip plate 43 is fixedly arranged on the vertical plate 42, a plurality of ratchet teeth are arranged at equal intervals on the strip plate 43, and the card slot is located between two adjacent ratchet teeth.

[0039] In this embodiment, a vertical shaft 10 and a stop block 11 are fixedly arranged on the sealing plate assembly 1, the ratchet block 3 is pivotally installed on the vertical shaft 10, the lower end surface of the ratchet block 3 abuts against the upper end surface of the stop block 11, and the limit is realized by the lower end surface abutting against the stop block 11 to ensure the stability of the ratchet block 3 and the smoothness of the operation.

[0040] Working principle:

[0041] The core of this circulating air duct device is to precisely adjust and safely lock the opening of the cold air door through a mechanical structure to meet different air supply requirements during the in-situ hot recycling process of asphalt pavement. Its working principle mainly depends on the coordinated action of components such as the slide rail 7, the ratchet block 3, the strip plate 43, and the locking bolt 8.

[0042] Initial state of the cold air door: When the equipment is in the construction state, the cold air door I 14 is tightly closed and fastened in place by tightening the bolt to prevent external air from directly entering the circulating air duct. The cold air door II 12 can move freely up and down by loosening its corresponding locking bolt 8 and being pulled by the protective chain 5.

[0043] Adjustment of the cold air volume: During the construction process, when it is necessary to supplement cold air to adjust the temperature of the heating area, the operator can pull up the cold air door II 12 to increase its opening. During the pulling process, the working surface of the ratchet block 3 will slide over the ratchet teeth on the strip plate 43 and slide upward. When the pulling stops, the working surface of the ratchet block 3 will naturally get stuck in the gap between two adjacent ratchet teeth on the strip plate 43, thereby fixing the cold air door II 12. This design makes the adjustment of the cold air volume both precise and convenient.

[0044] Adjustment of the cold air door position: If it is necessary to reduce the opening of the cold air door II 12, the operator can use tools such as pliers to pinch the ratchet block 3, rotate the ratchet block 3 until the ratchet working surface disengages from the strip plate 43. Then, adjust the cold air door II 12 to the appropriate position and rotate the ratchet block 3 counterclockwise so that its working surface re-inserts into the specified ratchet gap of the strip plate 43, thereby maintaining the cold air door II 12 at the specified position.

[0045] Heat dissipation operation: After the construction is completed, in order to perform the heat dissipation operation on the heating wall, the operator needs to first loosen the locking bolts 8 of the cold air door I 14 and the cold air door II 12, and completely pull them out through the protective chain 5 and place them on the heating wall. After the heat dissipation is completed, insert the cold air door back to the corresponding position and clamp it tightly with the locking bolt 8 to ensure the safety of the equipment during transportation.

[0046] Usage method:

[0047] Construction preparation: Adjust the in-situ hot air heating wall to the construction state and ensure that all components are correctly installed.

[0048] Cold air door adjustment:

[0049] Tightly close the cold air door I 14 and tighten the bolts for fixation.

[0050] Loosen the locking bolt 8 of the cold air door II 12 and check whether it can move up and down freely through the protective chain 5.

[0051] Rotate the ratchet block 3 and confirm that the cold air door II 12 is tightly closed.

[0052] Adjustment during construction:

[0053] Pull up the cold air door II 12 to the appropriate position in a timely manner according to the required cold air volume to be supplemented.

[0054] When stopping pulling, the ratchet block 3 will automatically get stuck in the designated ratchet gap of the strip board 43 to fix the cold air door II 12.

[0055] If it is necessary to adjust the opening degree of the cold air door II 12, use tools such as pliers to rotate the ratchet block 3 for fine adjustment.

[0056] Heat dissipation after construction:

[0057] Loosen the locking bolts 8 of the cold air door I 14 and the cold air door II 12.

[0058] Fully pull out both of them through the protective chain 5 and place them on the heating wall for heat dissipation.

[0059] After the heat dissipation is completed, insert the cold air door back to the corresponding position and clamp it with the locking bolt 8.

[0060] Equipment transportation: Flip the heating wall to the upright state and carry out the transportation and transfer work of the whole vehicle.

Claims

1. A circulating air channel device, characterized in that: It comprises a circulating air duct welding assembly (9), a heat insulation cotton assembly, a sealing plate assembly (1), a door panel (4), a ratchet block (3), a protective chain (5), and a locking bolt (8); an air inlet (6) and an air outlet (2) are arranged on the circulating air duct welding assembly (9); The thermal insulation cotton assembly is evenly covered on the outside of the circulating air duct welding assembly (9); the sealing plate assembly (1) is wrapped around the outside of the thermal insulation cotton assembly and fixed on the circulating air duct welding assembly (9); a slide rail (7) is installed on the outside of the air inlet (6), and the door panel (4) is placed on the outside of the air inlet (6) and connected to the slide rail (7); the locking bolt (8) is rotatably installed on the slide rail (7), and the locking bolt (8) is tightened to fix the position of the door panel (4) at the air inlet (6); one end of the protective chain (5) is fixed on the circulating air duct welding assembly (9), and the other end is fixed on the door panel (4); the ratchet block (3) is placed on one side of the air inlet (6) and is pivotally installed on the sealing plate assembly (1); and a slot matching the ratchet block (3) is provided on the door panel (4).

2. The circulating air channel device according to claim 1, characterized in that: The air inlet (6) is provided with two, namely a cold air door I (14) and a cold air door II (12); the cold air door I (14) is disposed on the end face of the circulating air duct welding assembly (9) opposite to the air outlet (2); the cold air door II (12) is disposed on the end face of the circulating air duct welding assembly (9) between the air outlet (2) and the cold air door I (14).

3. The circulating air channel device according to claim 2, characterized in that: The slide rails (7) are configured in four numbers; the four slide rails (7) are grouped in two, and each group of slide rails (7) is respectively and correspondingly arranged on both sides of the cold air door I (14) and the cold air door II (12).

4. The circulating air channel device according to claim 3, characterized in that: A first chain hanging plate (13) is fixedly arranged on two adjacent slide rails (7); one end of the protection chain (5) is fixed on the first chain hanging plate (13).

5. The circulating air channel device according to claim 4, characterized in that: Two second chain hanging plates (41) are fixedly arranged on the door panel (4), one of which is fixed to the upper end surface of the door panel (4), and the other is fixed to the upper middle portion of the outer facade of the door panel (4); the other end of the protective chain (5) is fixed to one of the second chain hanging plates (41).

6. The circulating air duct device according to any one of claims 1 to 5, characterized in that: A vertical plate (42) is fixedly arranged on the outer facade of the door panel (4), a strip plate (43) is fixedly arranged on the vertical plate (42), a plurality of ratchet teeth are arranged at equal intervals on the strip plate (43), and the clamping groove is located between two adjacent ratchet teeth.

7. The circulating air channel device according to claim 1, characterized in that: The sealing plate assembly (1) is fixedly provided with a vertical shaft (10) and a stopper (11); the ratchet block (3) is pivotally mounted on the vertical shaft (10); the lower end surface of the ratchet block (3) abuts against the upper end surface of the stopper (11).

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