Novel sectional type nozzle ring reinforcing device

Abstract

The utility model relates to the technical field of machining, in particular to a novel sectional type nozzle ring reinforcing device, a reinforcing assembly comprises a first-level locking threaded hole, the first-level locking threaded hole is formed in the top of a sectional type metal ceramic nozzle ring, an anti-abrasion first-level pressing bar is arranged above the sectional type metal ceramic nozzle ring, and a second-level locking threaded hole is formed in the top of the sectional type metal ceramic nozzle ring. The top of the anti-abrasion first-stage pressing fence is in threaded connection with a first-stage locking bolt. According to the novel sectional type nozzle ring reinforcing device, four bolt holes are punched in the upper end face and the lower end face of each section of nozzle ring, corresponding anti-abrasion pressing bars are manufactured for connection, the first-stage anti-abrasion pressing bars are connected with the upper end faces of the sectional type nozzle rings and the second-stage anti-abrasion pressing bars and then connected with the side faces of the lower ends of the sectional type nozzle rings again, the integrated nozzle rings are formed, and the nozzle rings are prevented from falling off; the long-period safe and stable operation of equipment is ensured, the problems of large pebble coal amount, large equipment loss, frequent maintenance, serious environmental pollution and the like of the coal mill are invisibly eliminated, and the maintenance cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal processing, in particular to a novel segmented nozzle ring reinforcement device. Background Art

[0002] The pulverizing system of the boiler of our 2x350MW unit is the medium-speed coal mill of ZGM95G-Ⅱ type produced by Beijing Electric Power Equipment Factory. The grinding ring and nozzle ring of the coal mill are composed of a rotating part and a stationary part. The rotating part includes a grinding ring tray, a liner, a conical cover, etc. These parts rotate under the drive of the transmission disc. The nozzle blades are connected to the grinding ring tray by bolts and rotate with the grinding disc. The stationary part is the nozzle static ring, which is fixed on the casing.

[0003] Under long-term operation, the design service life of the mill nozzle ring is far from achieved. The dynamic ring and static ring of the segmented nozzle ring show different degrees of wear. Hard debris is stuck between the dynamic ring and the static ring. As a result, the dynamic ring of the nozzle ring is severely deformed and broken, falling into the slag discharge chamber, causing the coal mill to be unable to operate, seriously affecting the safe, stable and economical operation of the unit.

[0004] Therefore, the present application develops a novel segmented nozzle ring reinforcement device. Utility Model Content

[0005] The purpose of the utility model is to provide a novel segmented nozzle ring reinforcement device to solve the problem proposed in the above background technology that the nozzle ring fails to reach the designed service life of the coal mill nozzle ring after long-term operation, the dynamic ring and the static ring of the segmented nozzle ring show different degrees of wear, hard debris is stuck between the dynamic ring and the static ring, and the dynamic ring of the nozzle ring is severely deformed and broken, and falls into the slag discharge chamber, causing the coal mill to be unable to operate, and the problem of nozzle ring breakage. To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a novel segmented nozzle ring reinforcement device, comprising a segmented metal ceramic nozzle ring, a reinforcement component is arranged on the top of the segmented metal ceramic nozzle ring, the reinforcement component comprises a first-level locking threaded hole, the first-level locking threaded hole is opened on the top of the segmented metal ceramic nozzle ring, and an anti-wear first-level pressure bar is arranged on the top of the segmented metal ceramic nozzle ring, and the top of the anti-wear first-level pressure bar is threadedly connected with a first-level locking bolt. By providing the anti-wear first-level pressure bar, it is convenient to connect the pressure bars corresponding to the bolt holes on the upper end face of the nozzle ring one by one and fix them with bolts to form an integrated type. The segmented nozzle ring is reinforced into an integral nozzle ring under the condition of convenient installation and maintenance, which is convenient for maintenance, convenient maintenance, shortened maintenance time, and convenient for the smooth falling of coal gangue.

[0006] Further preferably, the primary locking bolt is threadedly connected to the primary locking threaded hole, a secondary locking threaded hole is provided on one side of the segmented metal ceramic nozzle ring, a wear-resistant secondary pressure bar is threadedly connected to one side of the segmented metal ceramic nozzle ring, a limiting hole is provided on one side of the wear-resistant secondary pressure bar, the limiting hole is threadedly connected to a secondary locking bolt, and the secondary locking bolt is threadedly connected to a secondary locking threaded hole. By providing the wear-resistant secondary pressure bar, it is convenient to connect the pressure bars corresponding to the bolt holes on the side surfaces of the lower end of the nozzle ring one by one and fix them with bolts. The effect of this optimization and transformation significantly eliminates the problems of large amount of stone coal in the coal mill, large equipment loss, inconvenient maintenance, serious environmental pollution, etc. It not only eliminates the large amount of slag discharge, but also extends the service life of the equipment and saves maintenance costs.

[0007] Further preferably, a feed opening is opened in the middle of the top of the segmented metal ceramic nozzle ring, a cover plate is hinged on the top of the feed opening, a traction ear is fixedly connected to the top of the cover plate, and a protective cover is sleeved on the outer side of the segmented metal ceramic nozzle ring. By providing the protective cover, splashed material residues can bounce back from the protective cover, thereby avoiding accidental injury to nearby personnel and improving the safety of the equipment.

[0008] Further preferably, each segmented metal ceramic nozzle ring is provided with a primary locking threaded hole, and the anti-wear primary pressure bar connects and fixes the two segmented metal ceramic nozzle rings using a primary locking bolt. By integrating the segmented metal ceramic nozzle rings, the effect of reducing wear is achieved, thereby improving the practicality of the equipment.

[0009] Further preferably, four secondary locking threaded holes are arranged on one side of the bottom of each segmented metal ceramic nozzle ring, and the anti-wear secondary pressure bar connects and fixes the two segmented metal ceramic nozzle rings using secondary locking bolts. By further fixing the segmented metal ceramic nozzle rings, they are reinforced into a whole, which is convenient for maintenance and subsequent work efficiency improvement, and facilitates the efficiency of using the equipment.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] In the utility model, four bolt holes are respectively punched on the upper and lower end faces of each nozzle ring and corresponding anti-wear pressure bars are made for connection. The first anti-wear pressure bar is connected to the upper end face of the segmented nozzle ring, and the second anti-wear pressure bar is connected to the lower end side face of the segmented nozzle ring again to form an integrated nozzle ring, which prevents the nozzle ring from falling off and ensures the safe and stable operation of the equipment for a long period of time. It virtually eliminates the problems of large amount of stone coal in the coal mill, large equipment loss, frequent maintenance, serious environmental pollution, etc., and saves maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the disassembled structure of the wear-resistant first-level pressure fence of the utility model;

[0014] Figure 3 This is a schematic diagram of the disassembled structure of the wear-resistant secondary pressure bar of the utility model;

[0015] Figure 4 This is a schematic diagram of the top view structure of the utility model;

[0016] Figure 5 It is a partial enlarged structural schematic diagram of the utility model;

[0017] Figure 6 It is a schematic diagram of a partial three-dimensional structure of the utility model.

[0018] In the figure: 1. Segmented metal ceramic nozzle ring; 2. Reinforcement assembly; 201. Primary locking threaded hole; 202. Anti-wear primary pressure bar; 203. Primary locking bolt; 204. Secondary locking threaded hole; 205. Anti-wear secondary pressure bar; 206. Limiting hole; 207. Secondary locking bolt; 3. Feeding port; 4. Cover plate; 5. Towing lug; 6. Protective cover. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-Figure 6 The utility model provides a technical solution: a new type of segmented nozzle ring reinforcement device, including a segmented metal ceramic nozzle ring 1, a reinforcement component 2 is arranged above the segmented metal ceramic nozzle ring 1, the reinforcement component 2 includes a primary locking threaded hole 201, the primary locking threaded hole 201 is opened on the top of the segmented metal ceramic nozzle ring 1, an anti-wear primary pressure bar 202 is arranged above the segmented metal ceramic nozzle ring 1, the top of the anti-wear primary pressure bar 202 is threadedly connected with a primary locking bolt 203, the anti-wear primary pressure bar 202 is connected to one side of the top of the segmented metal ceramic nozzle ring 1, and the anti-wear secondary pressure bar 205 is connected to the bottom of one side of the segmented metal ceramic nozzle ring 1 to form an integrated nozzle ring to prevent the nozzle ring from falling.

[0021] In this embodiment, Figure 1 , Figure 2 and Figure 3As shown, the primary locking bolt 203 is threadedly connected to the primary locking threaded hole 201, a secondary locking threaded hole 204 is provided on one side of the segmented metal ceramic nozzle ring 1, a wear-resistant secondary pressure bar 205 is threadedly connected to one side of the segmented metal ceramic nozzle ring 1, a limiting hole 206 is provided on one side of the wear-resistant secondary pressure bar 205, the limiting hole 206 is threadedly connected to the secondary locking bolt 207, the secondary locking bolt 207 is threadedly connected to the secondary locking threaded hole 204, the blade thickness of the segmented metal ceramic nozzle ring 1 is increased from the original 20 mm to 40 mm, the wind pressure and wind speed are increased by reducing the circulation area of ​​the hot primary air, and a primary locking threaded hole 201 is provided at the top of the segmented metal ceramic nozzle ring 1.

[0022] In this embodiment, Figure 4 , Figure 5 and Figure 6 As shown, a feed opening 3 is provided in the middle of the top of the segmented metal ceramic nozzle ring 1, a cover plate 4 is hinged on the top of the feed opening 3, a traction ear 5 is fixedly connected to the top of the cover plate 4, a protective cover 6 is sleeved on the outer side of the segmented metal ceramic nozzle ring 1, four bolt holes are punched on the upper surface and the bottom of one side of each segmented metal ceramic nozzle ring 1, and corresponding anti-wear pressure bars are made for connection, the anti-wear first-level pressure bar 202 is connected to the upper surface of the segmented metal ceramic nozzle ring 1, and the anti-wear second-level pressure bar 205 is connected to the bottom of one side of the segmented metal ceramic nozzle ring 1 again to form an integrated nozzle ring.

[0023] The use method and advantages of the utility model: When the new segmented nozzle ring reinforcement device is used, the working process is as follows:

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the anti-wear first-level pressure bar 202 is connected to one side of the top of the segmented metal ceramic nozzle ring 1, and the anti-wear second-level pressure bar 205 is connected to the bottom of one side of the segmented metal ceramic nozzle ring 1 to form an integrated nozzle ring to prevent the nozzle ring from falling. The blade thickness of the segmented metal ceramic nozzle ring 1 is increased from the original 20 mm to 40 mm, and the wind pressure and wind speed are increased by reducing the circulation area of ​​the hot primary air. A first-level locking threaded hole 201 is opened on the top of the segmented metal ceramic nozzle ring 1, and four bolt holes are punched on the upper surface and the bottom of one side of each segmented metal ceramic nozzle ring 1, and a corresponding anti-wear pressure bar is made for connection. The anti-wear first-level pressure bar 202 is connected to the upper surface of the segmented metal ceramic nozzle ring 1, and the anti-wear second-level pressure bar 205 is connected to the bottom of one side of the segmented metal ceramic nozzle ring 1 again to form an integrated nozzle ring.

[0025] The above shows and describes the basic principle, main features and advantages of the utility model. Technical staff in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A novel segmented nozzle ring reinforcement device, comprising a segmented metal ceramic nozzle ring (1), characterized in that: A reinforcement component (2) is arranged above the segmented metal ceramic nozzle ring (1), the reinforcement component (2) comprising a primary locking threaded hole (201), the primary locking threaded hole (201) being opened at the top of the segmented metal ceramic nozzle ring (1), an anti-wear primary pressure bar (202) is arranged above the segmented metal ceramic nozzle ring (1), and a primary locking bolt (203) is threadedly connected to the top of the anti-wear primary pressure bar (202).

2. A novel segmented nozzle ring reinforcement device according to claim 1, characterized in that: The primary locking bolt (203) is threadedly connected to the primary locking threaded hole (201); a secondary locking threaded hole (204) is provided on one side of the segmented metal ceramic nozzle ring (1); a wear-resistant secondary pressure bar (205) is threadedly connected to one side of the segmented metal ceramic nozzle ring (1); a limiting hole (206) is provided on one side of the wear-resistant secondary pressure bar (205); a secondary locking bolt (207) is threadedly connected to the limiting hole (206); and the secondary locking bolt (207) is threadedly connected to the secondary locking threaded hole (204).

3. A novel segmented nozzle ring reinforcement device according to claim 1, characterized in that: A feed opening (3) is provided in the middle of the top of the segmented metal ceramic nozzle ring (1), a cover plate (4) is hingedly connected to the top of the feed opening (3), a traction hook (5) is fixedly connected to the top of the cover plate (4), and a protective cover (6) is sleeved on the outer side of the segmented metal ceramic nozzle ring (1).

4. A novel segmented nozzle ring reinforcement device according to claim 1, characterized in that: Four primary locking threaded holes (201) are provided on each of the segmented metal ceramic nozzle rings (1), and the anti-wear primary pressure bar (202) connects and fixes two segments of the segmented metal ceramic nozzle rings (1) using primary locking bolts (203).

5. A novel segmented nozzle ring reinforcement device according to claim 2, characterized in that: Four secondary locking threaded holes (204) are provided on each side of the bottom of the segmented metal ceramic nozzle ring (1), and the wear-resistant secondary pressure bar (205) connects and fixes the two segments of the segmented metal ceramic nozzle ring (1) using secondary locking bolts (207).

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