High-temperature floating annular sealing structure of asphalt material heating roller stock bin

Abstract

The invention discloses a high-temperature floating annular sealing structure of an asphalt material heating roller stock bin, and relates to the field of sealing structures of roller stock bins at high temperature. On the premise of high working temperature and poor concentricity, annular rolling sealing of the front end and the rear end can be achieved. According to the technical scheme, the high-temperature floating annular sealing structure comprises a front sealing structure arranged between the front portion of a stock bin and a heating furnace and a rear sealing structure arranged between the rear portion of the stock bin and a housing. As a whole, the stock bin is used as a rotatable moving part arranged between the heating furnace and the housing, and the sealing structures are redesigned at the front part and the rear part of the stock bin, so that the operation effect of the stock bin is ensured and improved, and meanwhile, a good sealing effect at high temperature is also achieved.

Description

Technical Field

[0001] The invention relates to the field of sealing structures of roller silos under high temperature, and specifically belongs to the technical application of a floating annular sealing structure of an asphalt material heating roller silo under high temperature environment. Background Art

[0002] The current asphalt drum heating silo adopts external heating, that is, the asphalt blocks in the silo are heated by external heating of the silo outer wall. The shortcomings of this indirect heating method are mainly reflected in the long heating time, high fuel consumption and uneven material temperature before and after the silo. With the continuous development of asphalt pavement maintenance technology, the performance requirements for maintenance equipment are getting higher and higher. Therefore, it is particularly important to solve the above-mentioned shortcomings.

[0003] To solve the above problems, we proposed a new type of silo heating system, namely internal heating, as recorded in the Chinese invention patent application with publication number CN117286756A, entitled "Automated Asphalt Pavement Repair Method and Device", that is, Figure 1 , 2 As shown, a heating furnace is arranged at the front of the silo, and the heating furnace is inserted into the silo from the front center of the silo, so as to heat the asphalt blocks directly inside the silo. This method can effectively solve the above problems, but it also brings new problems; 1. Because the silo is a rotating body and the heating furnace is a fixed body, the silo is mounted on the heating furnace and rotates relatively. When the furnace is working, the temperature here is very high and there is a lot of asphalt dust, which makes it impossible to use the bearings.

[0004] 2. Because the fixed base frames of the silo and the furnace body are different, it is difficult to achieve concentricity during assembly, but the matching gap here must be controlled within a very small range, otherwise the asphalt particles and dust in the silo will leak out from here.

[0005] 3. Because the temperature here is very high, conventional sealing materials cannot be used.

[0006] Similarly, the rear of the silo is the outlet. When the silo heats the asphalt blocks, a large amount of smoke will be generated. The smoke is mainly discharged from the exhaust pipe set in the cover of the silo outlet to the smoke filter and then discharged into the atmosphere. There are also problems such as very high temperature between the silo and the cover, which makes it impossible to use bearings and sealing materials and it is difficult to achieve concentricity. However, no asphalt particles and dust leak out here (the front end of the silo is lower than the outlet).

[0007] Combining the above points, the heating furnace, silo and cover have high working temperature, can rotate relative to each other, and the actual concentricity is not high, which in turn brings great trouble to the sealing of the front and rear ends of the silo. Summary of the invention

[0008] In view of the above problems, the present invention proposes a high-temperature floating annular sealing structure for an asphalt heating drum silo, which can achieve annular rolling sealing at the front and rear ends under the premise of high working temperature and poor concentricity.

[0009] The technical solution of the present invention is: the high-temperature floating annular sealing structure comprises a front sealing structure 1 arranged between the front of the silo and the heating furnace and a rear sealing structure 2 arranged between the rear of the silo and the cover; like Figure 3-5 As shown: The front sealing structure includes an annular fixing seat 11, an annular supporting seat 12, an annular pressing plate 13, an annular gasket 15 and a front sealing ring 14; The annular fixing seat 11 is fixedly installed at the front port of the silo, the annular support seat 12 is fixedly installed on the end surface of the annular fixing seat 11, the annular gasket 15 is fixedly installed on the annular support seat 12, and the annular pressure plate 13 is installed on the annular gasket 15. The annular fixing seat 11, the annular support seat 12, the annular pressure plate 13, and the annular gasket 15 are coaxially arranged, and there is a gap between the inner side of the annular support seat 12 and the inner side of the annular pressure plate 13; The cross section of the front sealing ring 14 is L-shaped, and it includes a cylindrical body portion and a ring plate portion which are connected as one body. The cylindrical body portion of the front sealing ring 14 is sleeved on the outer wall of the heating furnace, and a gap is left between the cylindrical body portion and the outer wall of the heating furnace. The outer edge of the ring plate portion of the front sealing ring 14 extends into the gap between the annular support seat 12 and the annular pressure plate 13, and the thickness of the ring plate portion of the front sealing ring 14 is less than the thickness of the annular gasket 15. like Figure 6-9 As shown: The rear sealing structure includes an annular mounting seat 21, an annular fixing plate 22 and a vent sealing ring 23. The annular mounting seat 21 is fixedly mounted in the housing, the annular fixing plate 22 is fixedly mounted on one side of the annular mounting seat 21, and an annular baffle 24 is provided between the two. The ventilation sealing ring 23 is sleeved on the rear part of the silo, and the outer edge of the ventilation sealing ring 23 extends between the annular mounting seat 21 and the annular fixing plate 22. The thickness of the outer edge of the ventilation sealing ring 23 is less than the thickness of the annular baffle 24. The ventilation sealing ring 23 is connected to a positive pressure air source, and the inner side of the ventilation sealing ring 23 discharges air inward.

[0010] Furthermore, the front sealing structure also includes an annular ventilation sealing ring 18 fixedly mounted on the heating furnace, the air inlet of the ventilation sealing ring 18 is arranged on the front end face thereof for connecting to a positive pressure air source, the air outlet of the ventilation sealing ring 18 is an annular air outlet nozzle 16, the annular air outlet nozzle 16 is located on the rear side of the outer wall of the ventilation sealing ring 18, and the annular air outlet nozzle 16 is located on the inner side of the cylindrical portion of the front sealing ring 14, that is, within the coverage range of the cylindrical portion of the front sealing ring 14. Furthermore, two of the annular support seat 12, the annular pressure plate 13, the front sealing ring 14 and the annular gasket 15 are provided. The two annular support seats 12 are respectively fixedly connected to the end faces on the front and rear sides of the annular fixing seat 11, and the two annular pressure plates 13 are respectively fixedly installed on the two annular support seats 12, thereby forming two floating spaces on the front and rear sides of the annular fixing seat 11. The cylindrical parts of the two front sealing rings 14 are fixedly connected to the outer wall of the heating furnace, and the annular plate parts extend into the two floating spaces respectively.

[0011] Furthermore, the ventilation sealing ring 23 includes a hollow annular body 231 and a positioning flange 232 fixedly connected to the outer wall of the annular body 231, the positioning flange 232 extends between the annular mounting seat 21 and the annular fixing plate 22, and the inner wall of the annular body 231 is provided with an annular slit-shaped annular air outlet 233.

[0012] The present invention provides a front sealing structure and a rear sealing structure between the front of the silo and the heating furnace, and between the rear of the silo and the cover shell, respectively. For the front of the silo, during the rotation of the silo, the double sealing structure of the sealing ring and the ventilation sealing ring floating between the front end of the silo and the heating furnace can automatically correct the eccentricity caused by the structure to ensure the normal operation of the silo, and can also work in a high temperature environment to block smoke, particles and dust, and effectively seal. For the rear of the silo, a floating distance is provided in the radial direction between the ventilation sealing ring and the annular mounting seat, so that it floats at the outlet of the silo to ensure the normal rotation of the silo, and further, with the help of wind of a certain pressure blowing out from the annular air outlet to form a powerful annular wind curtain, smoke can be blocked, thereby achieving effective sealing.

[0013] Generally speaking, the silo is a rotatable moving part set between the heating furnace and the cover. In this case, the sealing structure of the front and rear of the silo has been redesigned. While ensuring and improving the operation effect of the silo, it also plays a good sealing role under high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the background technology of this case Figure 1 , Figure 2This is the background technology of this case Figure 2 ; Figure 3 It is a schematic diagram of the cross-sectional structure of the silo. Figure 4 It is a schematic diagram of the front sealing structure. Figure 5 It is a three-dimensional schematic diagram of the front sealing structure. Figure 6 It is a schematic diagram of the rear sealing structure. Figure 7 It is a three-dimensional schematic diagram of the rear sealing structure. Figure 8 It is a structural diagram of the ventilation sealing ring. Fig. 9 is a cross-sectional view of the vent seal ring; In the figure, 1 is a front sealing structure, 11 is an annular fixing seat, 12 is an annular supporting seat, 13 is an annular pressing plate, and 14 is a front sealing ring; 2 is a rear sealing structure, 21 is an annular mounting bin, 22 is an annular fixing plate, 23 is a ventilation sealing ring, 231 is an annular body, 232 is a positioning flange, and 233 is an annular air outlet. DETAILED DESCRIPTION

[0015] In order to clearly illustrate the technical features of this patent, this patent is elaborated in detail below through a specific implementation method and in combination with its accompanying drawings.

[0016] The high temperature floating annular sealing structure includes a front sealing structure 1 provided between the front of the silo and the heating furnace, and a rear sealing structure 2 provided between the rear of the silo and the cover. The rear end of the heating furnace extends into the silo, the rear of the silo extends into the cover, and the silo can rotate around its own axis driven by a driving device.

[0017] like Figure 3-5 As shown: The front sealing structure includes an annular fixing seat 11 , an annular supporting seat 12 , an annular pressing plate 13 , an annular gasket 15 and a front sealing ring 14 .

[0018] The annular fixing seat 11 is fixedly installed at the front opening of the silo, the annular support seat 12 is fixedly installed on the end face of the annular fixing seat 11, the annular gasket 15 is fixedly installed on the annular support seat 12, and the annular pressure plate 13 is installed on the annular gasket 15. The annular fixing seat 11, the annular support seat 12, the annular pressure plate 13, and the annular gasket 15 are coaxially arranged, and there is a gap between the inner side of the annular support seat 12 and the inner side of the annular pressure plate 13; thereby, a floating space is formed in the gap position between the inner side of the annular support seat 12 and the inner side of the annular pressure plate 13, and the width of the floating space is the thickness of the annular gasket 15.

[0019] The cross-section of the front sealing ring 14 is L-shaped, and it includes a cylindrical portion and a ring plate portion which are connected as one. The cylindrical portion of the front sealing ring 14 is mounted on the outer wall of the heating furnace, and a gap is left between the cylindrical portion and the outer wall of the heating furnace. The outer edge of the ring plate portion of the front sealing ring 14 extends into the gap between the annular support seat 12 and the annular pressure plate 13, and the thickness of the ring plate portion of the front sealing ring 14 is less than the thickness of the annular gasket 15.

[0020] The annular pressure plate 13 , the annular gasket and the annular support seat 12 are fixedly mounted on the end surface of the annular fixing seat 11 by bolts.

[0021] The annular pressure plate 13 limits the axial movement of the front sealing ring 14, but does not compress it, so that the front sealing ring 14 is provided with a floating distance in the radial direction. The purpose is to avoid the mechanical interference problem caused by the phenomenon that the silo and the furnace body are more or less non-concentric when assembled together. The cylindrical body of the front sealing ring 14 is sleeved on the outer ring matching surface of the heating furnace, and a small matching gap is left to float on the outer ring of the heating furnace.

[0022] In this way, a front sealing ring is set between the front end of the silo and the heating furnace. This sealing ring is not fixed, but floats between the front end of the silo and the heating furnace. When the silo is heated and rotated, on the one hand, the eccentricity caused by the structure of this sealing ring can be automatically corrected to ensure the normal operation of the silo. On the other hand, it can work in a high temperature environment and effectively seal asphalt particles and dust.

[0023] The front sealing structure also includes an annular ventilation sealing ring 18 fixedly mounted on the heating furnace. The ventilation sealing ring 18 is arranged on the inner wall of the annular interface cylindrical surface of the heating furnace and forms an integral body with the heating furnace body. The air inlet of the ventilation sealing ring 18 is arranged on the end face of the front side thereof for connecting to a positive pressure air source. The air outlet of the ventilation sealing ring 18 is an annular air outlet nozzle 16. The annular air outlet nozzle 16 is located on the rear side of the outer wall of the ventilation sealing ring 18, and the annular air outlet nozzle 16 is located on the inner side of the barrel portion of the front sealing ring 14, that is, within the coverage range of the barrel portion of the front sealing ring 14. In this way, Figure 4 As shown, wind with a certain pressure enters the ventilation sealing ring 18 from the air inlet, and then blows out through the annular air outlet 16 to form a powerful annular wind curtain to block the smoke, thereby achieving effective sealing. It can effectively seal asphalt smoke and dust in a high temperature environment.

[0024] The annular support seat 12, annular pressure plate 13, front sealing ring 14 and annular gasket 15 are all provided with two, the two annular support seats 12 are respectively fixedly connected to the end surfaces of the front and rear sides of the annular fixing seat 11, and the two annular pressure plates 13 are respectively fixedly installed on the two annular support seats 12, so that two floating spaces are formed on the front and rear sides of the annular fixing seat 11, and the cylinder parts of the two front sealing rings 14 are both sleeved on the outer wall of the heating furnace, and the ring plate parts extend into the two floating spaces respectively. Thus, an inner and outer double-layer arrangement is formed, which further ensures that the silo does not leak when heating the asphalt block material.

[0025] like Figure 6-9 As shown: The rear sealing structure is specifically to set a wind curtain type annular sealing ring between the outlet of the rear part of the silo and the matching part of the cover. This sealing ring is not fixedly installed, but floats between the outlet of the silo and the cover. When the silo is heated and rotated, on the one hand, the eccentricity of this sealing ring can be automatically corrected due to the structure to ensure the normal operation of the silo. On the other hand, in a high temperature environment, this sealing ring can blow out wind with a certain pressure from the narrow slit (annular air outlet) on this sealing ring and form a powerful annular wind curtain to achieve the barrier of smoke, thereby achieving effective sealing.

[0026] The rear sealing structure includes an annular mounting seat 21, an annular fixing plate 22 and a ventilation sealing ring 23. The annular mounting seat 21 is fixedly installed in the housing, the annular fixing plate 22 is fixedly installed on one side of the annular mounting seat 21, and an annular baffle 24 is provided between the two.

[0027] The ventilation sealing ring 23 is sleeved on the rear part of the silo, and the outer edge of the ventilation sealing ring 23 extends between the annular mounting seat 21 and the annular fixing plate 22, and the thickness of the outer edge of the ventilation sealing ring 23 is less than the thickness of the annular baffle 24; the ventilation sealing ring 23 is connected to a positive pressure air source, and the inner side of the ventilation sealing ring 23 discharges air inward.

[0028] In this way, the annular fixing plate 22 can limit the axial movement of the vent seal ring 23, but it is not pressed. A floating distance is set in the radial direction between the vent seal ring 23 and the annular mounting seat 21. The purpose is to prevent the mechanical interference caused by the phenomenon that there is more or less eccentricity when the silo and the cover are assembled together. The inner ring of the vent seal ring 23 is sleeved on the outer ring mating surface at the silo outlet, leaving a small mating gap to float on the outer ring at the silo outlet to ensure the normal rotation of the silo.

[0029] The ventilation seal ring 23 includes a hollow annular body 231 and a positioning flange 232 fixedly connected to the outer wall of the annular body 231. The positioning flange 232 extends between the annular mounting seat 21 and the annular fixing plate 22. An annular air outlet 233 in the form of an annular slit is provided on the inner wall of the annular body 231. The air inlet of the ventilation seal ring 23 is welded to the left and right ends of the annular cavity, and the annular air outlet 233 is welded to the annular cavity. Wind with a certain pressure enters the annular body 231 from the air inlet, and then blows out through the annular air outlet to form a powerful annular wind curtain to block the smoke, thereby achieving effective sealing.

[0030] The annular fixing plate 22 and the annular gasket are fixedly mounted on the end surface of the annular mounting seat 21 by means of bolts.

[0031] There are many specific implementation ways of the present invention. The above is only the preferred implementation mode of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principle of the present invention. These improvements should also be regarded as the protection scope of the present invention.

Claims

1. A high-temperature floating annular sealing structure for an asphalt heating drum silo, characterized in that: The high-temperature floating annular sealing structure comprises a front sealing structure (1) arranged between the front of the silo and the heating furnace, and a rear sealing structure (2) arranged between the rear of the silo and the cover shell; The front sealing structure comprises an annular fixing seat (11), an annular supporting seat (12), an annular pressing plate (13), an annular gasket (15) and a front sealing ring (14); The annular fixing seat (11) is fixedly mounted at the front opening of the silo, the annular support seat (12) is fixedly mounted on the end surface of the annular fixing seat (11), the annular gasket (15) is fixedly mounted on the annular support seat (12), the annular pressure plate (13) is mounted on the annular gasket (15), the annular fixing seat (11), the annular support seat (12), the annular pressure plate (13) and the annular gasket (15) are coaxially arranged, and a gap is provided between the inner side of the annular support seat (12) and the inner side of the annular pressure plate (13); The cross section of the front sealing ring (14) is L-shaped, and comprises a cylindrical portion and an annular plate portion which are connected as one body. The cylindrical portion of the front sealing ring (14) is sleeved on the outer wall of the heating furnace, and a gap is left between the cylindrical portion and the outer wall of the heating furnace. The outer edge of the annular plate portion of the front sealing ring (14) extends into the gap between the annular support seat (12) and the annular pressure plate (13), and the thickness of the annular plate portion of the front sealing ring (14) is less than the thickness of the annular gasket (15). The rear sealing structure comprises an annular mounting seat (21), an annular fixing plate (22) and a vent sealing ring (23); the annular mounting seat (21) is fixedly mounted in the housing; the annular fixing plate (22) is fixedly mounted on one side of the annular mounting seat (21), and an annular baffle (24) is provided between the two. The ventilation sealing ring (23) is sleeved on the rear part of the silo, and the outer edge of the ventilation sealing ring (23) extends between the annular mounting seat (21) and the annular fixing plate (22), the thickness of the outer edge of the ventilation sealing ring (23) is less than the thickness of the annular baffle (24), the ventilation sealing ring (23) is connected to a positive pressure air source, and the inner side of the ventilation sealing ring (23) discharges air inwardly.

2. A high-temperature floating annular sealing structure for an asphalt heating drum silo according to claim 1, characterized in that: The front sealing structure also includes an annular ventilation sealing ring (18) fixedly mounted on the heating furnace, wherein the air inlet of the ventilation sealing ring (18) is arranged on the front end surface thereof for connecting to a positive pressure air source, and the air outlet of the ventilation sealing ring (18) is an annular air outlet nozzle (16), wherein the annular air outlet nozzle (16) is located on the rear side of the outer wall of the ventilation sealing ring (18), and the annular air outlet nozzle (16) is located on the inner side of the barrel portion of the front sealing ring (14), that is, within the coverage range of the barrel portion of the front sealing ring (14).

3. The high-temperature floating annular sealing structure of the asphalt heating drum silo according to claim 1 is characterized in that: The annular support seat (12), the annular pressure plate (13), the front sealing ring (14) and the annular gasket (15) are all provided in pairs. The two annular support seats (12) are respectively fixedly connected to the end surfaces of the front and rear sides of the annular fixing seat (11). The two annular pressure plates (13) are respectively fixedly mounted on the two annular support seats (12), thereby forming two floating spaces on the front and rear sides of the annular fixing seat (11). The barrel parts of the two front sealing rings (14) are both fixedly connected to the outer wall of the heating furnace, and the ring plate parts extend into the two floating spaces respectively.

4. The high-temperature floating annular sealing structure of the asphalt heating drum silo according to claim 1 is characterized in that: The ventilation sealing ring (23) comprises a hollow annular body (231) and a positioning flange (232) fixedly connected to the outer wall of the annular body (231); the positioning flange (232) extends between the annular mounting seat (21) and the annular fixing plate (22); and an annular slit-shaped annular air outlet (233) is provided on the inner wall of the annular body (231).

Images