CN213222672U - Air inlet pipe supporting structure of vertical mill - Google Patents
Air inlet pipe supporting structure of vertical mill Download PDFInfo
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- CN213222672U CN213222672U CN202022168105.1U CN202022168105U CN213222672U CN 213222672 U CN213222672 U CN 213222672U CN 202022168105 U CN202022168105 U CN 202022168105U CN 213222672 U CN213222672 U CN 213222672U
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- air inlet
- inlet pipe
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Abstract
The utility model relates to a grind the equipment field immediately, disclose a grind air-supply line bearing structure immediately. The air inlet pipe supporting structure of the vertical mill comprises at least one group of supporting assemblies arranged between an air inlet pipe and a connecting bridge, wherein each supporting assembly comprises an upper support, a lower support and a middle support; the upper support is connected with the connecting bridge, the upper part of the middle support body is hinged with the upper support, and a hinged shaft is vertical to the thermal expansion direction of the air inlet pipe; the lower support is connected with the air inlet pipe, a long hole is formed in the lower support, the length direction of the long hole is parallel to the thermal expansion direction of the air inlet pipe, and the lower portion of the middle support is hinged in the long hole of the lower support through a movable hinged shaft. The stress condition of the welding line between the air inlet pipe and the air box is fundamentally improved through the supporting structure, the shear stress and the bending stress of the welding line are reduced, the phenomena that the connecting welding line between the air inlet pipe and the air box cracks due to weight and impact vibration of a mill and the like are avoided, and the impact vibration resistance of the air inlet pipe is improved.
Description
Technical Field
The utility model belongs to the technical field of the vertical mill equipment and specifically relates to an air-supply line bearing structure immediately grinds is related to.
Background
The vertical mill is a high-efficiency energy-saving grinding equipment widely used in building material, chemical and steel industries, and is mainly used for grinding, drying and sorting cement raw materials, clinker, raw coal, blast furnace slag of iron and steel plants, steel slag and the like. At present, the vertical mill at home and abroad is developing towards the large-scale direction of equipment, the sizes and the weights of parts of the equipment are increased, the air inlet pipeline of the vertical mill is a large-scale welding structural member, the cross section of the air inlet pipeline is mostly of a rectangular structure, the overall dimension of the air inlet pipeline of some large-scale vertical mills reaches 2m multiplied by 4m, the weight is nearly 10 tons, the air inlet pipeline is in butt joint assembly welding with an annular gas tank on site, the air inlet pipeline is of a cantilever beam stress structure, the butt joint welding line bears the weight of an air pipe and also bears the weight of materials accumulated in the air inlet pipe, and in addition, the impact vibration during the operation of the mill is generated, so the stress working condition of the welding line is severe, the welding line is cracked frequently, the air. In the past, a user temporarily adds a fixed support on the site, but the fixed support cannot solve the problem of expansion with heat and contraction with cold of the air inlet pipe under the working condition of high temperature close to 300 ℃, so that the connecting welding line still cracks frequently, powder leakage and slag leakage occur, and the environment is seriously polluted.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a vertical mill air-supply line bearing structure is provided, avoid the air-supply line phenomenon such as welding seam fracture to take place under dead weight, long-pending material, mill impact vibration and expend with heat and contract with cold situation.
The utility model discloses a vertical mill air inlet pipe supporting structure, which comprises at least one group of supporting components arranged between an air inlet pipe and a connecting bridge, wherein each supporting component comprises an upper support, a lower support and a middle support body; the upper support is connected with the connecting bridge, the upper part of the middle support body is hinged with the upper support, and a hinged shaft is vertical to the thermal expansion direction of the air inlet pipe; the lower support is connected with the air inlet pipe, a long hole is formed in the lower support, the length direction of the long hole is parallel to the thermal expansion direction of the air inlet pipe, and the lower portion of the middle support is hinged in the long hole of the lower support through a movable hinged shaft.
Furthermore, a wear-resistant base plate is arranged on the bearing surface of the long hole.
Furthermore, the middle support body comprises a swing seat and a support rod, a vertical screw rod is arranged on the upper portion of the support rod along the upper portion of the support rod, the vertical screw rod is connected with the swing seat through a tightening nut, the upper portion of the swing seat is hinged to the upper support, and the lower portion of the support rod is hinged to a long hole of the lower support through a movable hinged shaft.
Furthermore, the upper part of the swing seat and the lower part of the supporting rod are respectively provided with double lug plates, the upper support is hinged between the double lug plates of the swing seat, and the lower support is hinged between the double lug plates of the supporting rod.
Furthermore, the upper support is connected to the side surface or the bottom surface of the connecting bridge, and the material of the upper support is consistent with that of the connecting bridge.
Furthermore, the lower support is connected to the side face or the top face of the air inlet pipe, and the material of the lower support is consistent with that of the air inlet pipe.
Furthermore, the number of the supporting assemblies is two, and the two groups of supporting assemblies are respectively arranged on two sides of the air inlet pipe.
The utility model has the advantages that: because the utility model adopts the above technical scheme, will grind the air-supply line and turn into two-point or multipoint supporting structure from original cantilever bearing structure, the welding seam atress condition of air-supply line and air box has been improved fundamentally, has reduced shear stress and bending stress of welding seam, avoid the air-supply line and air box between connect the welding seam because of weight and mill impact vibration and appear phenomenons such as fracture, improved the air-supply line and resisted shock vibration ability; the upper part of the air inlet pipe supporting component is provided with a hinged structure, and the lower part of the air inlet pipe supporting component is provided with a long hole hinged structure, so that the technical problem that an air inlet pipeline is freely stretched after expansion with heat and contraction with cold is ingeniously solved; the supporting structure is simple and practical, low in cost, convenient to install, firm and reliable, and the running reliability of the mill is obviously improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a view in the direction a of fig. 1.
Reference numerals: the air-supply line 1 connects bridge 2, gas tank 3, undersetting 4, activity articulated shaft 5, slot hole 6, wear-resisting backing plate 7, bracing piece 8, pendulum seat 9, tightening nut 10, upper bracket 11, flexible coupling 12, joint weld 13, vertical screw 14, ears board 15.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in figure 1, one end of an air inlet pipe 1 of a vertical mill is welded with an air box 3, the other end of the air inlet pipe is provided with a flexible connection 12 which does not bear the weight of the air inlet pipe 1, in the figure, a hollow arrow in the air inlet pipe 1 represents a hot air direction, arrows on two sides of the air inlet pipe 1 represent a thermal expansion direction, and a connecting bridge 2 is positioned above the air inlet pipe 1. The utility model discloses a vertical mill air inlet pipe 1 supporting structure, which comprises at least one group of supporting components arranged between the air inlet pipe 1 and a connecting bridge 2, wherein the supporting components comprise an upper support 11, a lower support 4 and an intermediate support body; the upper support 11 is connected with the connecting bridge 2, the upper part of the middle support body is hinged with the upper support 11, and a hinged shaft is vertical to the thermal expansion direction of the air inlet pipe 1; the air inlet pipe is characterized in that the lower support 4 is connected with the air inlet pipe 1, a long hole 6 is formed in the lower support 4, the length direction of the long hole 6 is parallel to the thermal expansion direction of the air inlet pipe 1, a pin hole is formed in the lower portion of the middle support body, and the pin hole of the middle support body is connected with the long hole 6 of the lower support 4 through a movable hinged shaft 5.
The original cantilever stress structure is converted into a similar two-fulcrum simply supported beam structure by the support structure, the support component bears part of the weight of the air inlet pipe 1, the force is transmitted to the connecting bridge 2 with better strength and rigidity, and the stress of the connecting welding line 13 of the air inlet pipe 1 is reduced. The lower part of the middle support body of the support structure is hinged in a long hole 6 of a lower support 4, the long hole 6 can be in a shape of a waist-shaped hole, a rectangular hole and the like, the length direction of the long hole 6 is parallel to the thermal expansion direction of the air inlet pipe 1, when the air inlet pipe 1 expands with heat and contracts with cold, a movable hinged shaft 5 hinged on the lower part of the middle support body moves in the long hole 6, so that the influence of the thermal expansion on the support is avoided, meanwhile, the upper part of the middle support body is hinged with an upper support 11, the hinged shaft is controlled to be perpendicular to the thermal expansion direction of the air inlet pipe 1, the hinged rotating plane of the middle support body is parallel to the thermal expansion direction of the air.
Because the bearing surface of the long hole 6 is easy to wear by rubbing with the movable articulated shaft 5 under the condition of bearing the gravity generated by the air inlet pipe 1, in order to reduce the wear as much as possible, the bearing surface of the long hole 6 is provided with a wear-resistant backing plate 7. As shown in fig. 1, the bearing surface of the long hole 6 is the inner top surface, the wear-resistant pad 7 is arranged on the inner top surface, the wear-resistant pad 7 is preferably made of high-carbon steel, and the pad is subjected to overall heat treatment, so that the pad has higher hardness, the wear-resistant pad 7 is prevented from being worn rapidly when the movable hinge shaft 5 rolls on the surface of the pad, and the service life of the supporting structure is prolonged.
The air inlet pipe 1 is welded on the air box 3 and is supported by the connecting welding seam 13 and the supporting component together, the supporting force of the supporting component on the air inlet pipe 1 mainly depends on the upward tensioning degree of the supporting component, the upward tensioning degree is difficult to control in the direct installation process, for this reason, the middle supporting body comprises a swinging seat 9 and a supporting rod 8, a vertical screw 14 is arranged on the upper portion of the supporting rod 8, the vertical screw 14 is connected with the swinging seat 9 through a tightening nut 10, the upper portion of the swinging seat 9 is hinged with an upper support 11, and the lower portion of the supporting rod 8 is hinged in a long hole 6 of a lower support 4 through a movable hinged shaft 5. The load of the air inlet pipe 1 borne by the supporting component can be adjusted by adjusting the pre-tightening force through the tightening nut 10, and usually, the supporting structure bears half of the weight of the air inlet pipe 1 as the best. The inner side of the tightening nut 10 can be further provided with a check washer for preventing the loosening of the tightening nut 10 from causing the bearing change of the supporting structure. The tightening nut 10 and the lock washer may be nuts with good locking effect such as a round nut and a round nut washer. The connection of the upper part of the swing seat 9 and the lower part of the support rod 8 ensures that the lower part of the support rod 8 can still play the role of automatic adjustment in the process of expansion with heat and contraction with cold of the air inlet pipe 1.
The welding structure of the support rod 8 is optimized, the body of the support rod 8 and the joint of the lower part of the support rod are welded by common steel plates, a screw rod on the upper part of the support rod is a 35# or 45# steel forging, the screw rod needs to be preheated during welding, the quality of a welding seam is ensured, and the support rod 8 integrally has enough strength and rigidity so as to bear the weight of the air inlet pipe 1 and the impact vibration load. The swing seat 9 is preferably of a welded structure and only needs to be welded by a common steel plate. The connection between the swing seat 9 and the upper seat 11 and the connection between the support rod 8 and the lower seat 4 may refer to the existing hinge manner, as shown in fig. 2, in the embodiment, the upper portion of the swing seat 9 and the lower portion of the support rod 8 are respectively provided with two lug plates 15, the upper seat 11 is hinged between the two lug plates 15 of the swing seat 9, the lower seat 4 is hinged between the two lug plates 15 of the support rod 8, and the movable hinge shaft 5 may adopt a pin shaft whose end is locked by a cotter pin.
The upper support 11 is preferably a welded structural member and can be connected to the side surface or the bottom surface of the connecting bridge 2, and the material of the upper support 11 is as consistent as possible with that of the connecting bridge 2 so as to ensure that the strength and the thermal expansion rate of a welding seam welded on site are consistent; similarly, the material of the lower support 4 is as consistent as possible with the air inlet pipe 1, and the lower support 4 can be connected to the side surface or the top surface of the air inlet pipe 1, which can be determined according to the actual spatial position.
Although it is possible to provide a single set of support members for the air inlet duct 1, for example, between the top of the air inlet duct 1 and the bottom of the connecting bridge 2, in order to further improve the strength and stability of the support, as shown in the embodiment shown in fig. 1 and 2, the number of support members is two, and two sets of support members are respectively provided on both sides of the air inlet duct 1. Wherein, two sets of bottom supports 4 set up respectively in air-supply line 1 side, and two sets of upper bracket 11 set up in the bottom surface of connecting bridge 2.
Claims (7)
1. The vertical mill air inlet pipe supporting structure is characterized by comprising at least one group of supporting assemblies arranged between an air inlet pipe (1) and a connecting bridge (2), wherein each supporting assembly comprises an upper support (11), a lower support (4) and a middle support body; the upper support (11) is connected with the connecting bridge (2), the upper part of the middle support body is hinged with the upper support (11), and a hinged shaft is vertical to the thermal expansion direction of the air inlet pipe (1); the air inlet pipe is characterized in that the lower support (4) is connected with the air inlet pipe (1), a long hole (6) is formed in the lower support (4), the length direction of the long hole (6) is parallel to the thermal expansion direction of the air inlet pipe (1), and the lower portion of the middle support body is hinged in the long hole (6) of the lower support (4) through a movable hinged shaft (5).
2. The air inlet pipe support structure of the vertical mill as set forth in claim 1, wherein: and a wear-resistant base plate (7) is arranged on the bearing surface of the long hole (6).
3. The air inlet pipe support structure of the vertical mill as set forth in claim 1, wherein: the middle supporting body comprises a swing seat (9) and a supporting rod (8), a vertical screw rod (14) is arranged on the upper portion of the supporting rod (8), the vertical screw rod (14) is connected with the swing seat (9) through a tightening nut (10), the upper portion of the swing seat (9) is hinged to an upper support (11), and the lower portion of the supporting rod (8) is hinged to a long hole (6) of a lower support (4) through a movable hinged shaft (5).
4. The air inlet pipe support structure of the vertical mill as set forth in claim 3, wherein: the upper portion of the swing seat (9) and the lower portion of the supporting rod (8) are respectively provided with double lug plates (15), the upper support (11) is hinged between the double lug plates of the swing seat (9), and the lower support (4) is hinged between the double lug plates (15) of the supporting rod (8).
5. The air inlet pipe support structure of the vertical mill as set forth in claim 1, wherein: the upper support (11) is connected to the side surface or the bottom surface of the connecting bridge (2), and the material of the upper support (11) is consistent with that of the connecting bridge (2).
6. The air inlet pipe support structure of the vertical mill as set forth in claim 1, wherein: the lower support (4) is connected to the side face or the top face of the air inlet pipe (1), and the material of the lower support (4) is consistent with that of the air inlet pipe (1).
7. The air inlet pipe support structure of the vertical mill as set forth in claim 1, 5 or 6, wherein: the number of the supporting components is two, and the two groups of supporting components are respectively arranged on two sides of the air inlet pipe (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022168105.1U CN213222672U (en) | 2020-09-28 | 2020-09-28 | Air inlet pipe supporting structure of vertical mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022168105.1U CN213222672U (en) | 2020-09-28 | 2020-09-28 | Air inlet pipe supporting structure of vertical mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213222672U true CN213222672U (en) | 2021-05-18 |
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ID=75877109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022168105.1U Active CN213222672U (en) | 2020-09-28 | 2020-09-28 | Air inlet pipe supporting structure of vertical mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213222672U (en) |
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2020
- 2020-09-28 CN CN202022168105.1U patent/CN213222672U/en active Active
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