Supporting structure for spiral conveyor of steel ball coal mill
By using components such as fastening frames, fastening rods, and dustproof nuts in the screw conveyor of the ball mill, an integrated support structure with multiple struts is formed, which solves the problems of strut wear and detachment, improves the stability and reliability of the equipment, reduces material and labor costs, and ensures safe operation.
Patent Information
- Application Number
- CN202423096667.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-16
AI Technical Summary
The struts of the screw conveyor in the ball mill are prone to detachment and breakage due to wear and debris during long-term operation, affecting the stability and reliability of the equipment.
The system employs components such as fastening frames, fastening rods, dustproof nuts, and adjusting nuts to form an integrated support structure with multiple struts. Fastening and dustproof measures prevent the struts from wearing out and falling off, thus maintaining the centering and stability of the auger.
It effectively prevents the support rods from wearing out and falling off, improves the reliability and stability of the equipment, reduces the risk of downtime, lowers material and labor costs, and ensures safe operation.
Smart Images
Figure CN223669312U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of steel ball coal mill, and relates to a steel ball coal mill spiral conveyor support structure. BACKGROUND
[0002] Double-in double-out steel ball coal mill (referred to as "coal mill") is the main equipment of the direct-fired coal mill system of the thermal power plant, and the raw coal is fed into the mixing box from the raw coal hopper through the speed automatic control coal feeder, is pre-dried through the bypass air, and is dropped onto the upper inlet of the spiral conveyor through the coal dropping pipe. The coal is sent into the rotating cylinder by the rotating movement of the spiral conveyor. A certain amount of grinding medium, i.e. steel ball, is arranged in the cylinder. The steel ball is lifted to a certain height by the rotating movement of the cylinder, and the coal is impacted and rubbed by the steel ball in the process of free falling and throwing until the coal is ground into coal powder.
[0003] In order to ensure the normal rotation of the spiral conveyor (referred to as "auger"), one side of the auger is generally supported by four support rods, one end of the support rod is inserted into the recess of the angle tile of the end face of the large tank cylinder of the coal mill, and the other end is fixed on the auger cylinder through the nut and the sleeve. During the operation, the four support rods are the only way to transmit power to the auger.
[0004] However, the support rod often falls off and breaks during the long-term operation of the auger, and the main reasons are as follows:
[0005] (1) One end of the head of the support rod is inserted into the recess of the angle tile of the end face of the large tank cylinder of the coal mill, and there is a certain gap between the hole in the recess and the inserted part of the head of the support rod. During the operation, coal powder, broken steel ball slag, stones and other impurities often enter the gap, which leads to the wear and thinning of the head of the support rod and even the breakage of the head of the support rod.
[0006] (2) The sleeve is welded on the contact surface on both sides by penetrating the auger cylinder, and the support rod is locked and fixed at both ends of the sleeve by the nut, so that the other end of the support rod is fixed on the auger cylinder by the sleeve and the nut. Due to the wear and thinning or breakage of the head of the support rod, the center position of the auger cylinder deviates during rotation, which causes the welding seam of the welded part of the sleeve and the auger cylinder to crack and expand during long-term operation, and further causes the support rod and the sleeve to fall off.
[0007] In order to solve and avoid the above problems of the support rod of the auger during the long-term operation, improve the reliable and stable operation of the equipment, and solve the above problems, a steel ball coal mill spiral conveyor support structure is needed. UTILITY MODEL CONTENTS
[0008] In view of the above problems, the utility model provides a steel ball coal mill spiral conveyor support structure, which solves the problems in the prior art.
[0009] In order to achieve the above object, the technical scheme adopted by the utility model is as follows:
[0010] A spiral conveyor support structure of a steel ball coal mill, including an auger, a fixed assembly for power transmission and a plurality of sheaths, the middle part of each sheath passes through the sidewall of the auger and is fixedly connected with the auger, the inside of each sheath is sleeved with a strut, the outside of each strut is connected with the fixed assembly, the strut is provided with an adjusting mechanism for adjusting the front and back positions of the sheath relative to the strut, the adjusting mechanism and the strut are matched to form the structure of the auger in the middle, the inside of the auger is centrally provided with a fastening frame, the outside of the fastening frame is fixedly connected with a fastening rod corresponding to the strut, each fastening rod is arranged along the radial direction of the auger, and the outside of each fastening rod is provided with a fastening mechanism for supporting the strut.
[0011] Preferably, the side, close to the fixed assembly, of each strut is provided with an external thread, the outside of the external thread is threadedly connected with a dustproof nut, and the side, close to the fixed assembly, of the dustproof nut is abutted against the fixed assembly.
[0012] Preferably, the adjusting mechanism comprises two adjusting nuts, the two adjusting nuts are arranged at the two ends of the corresponding sheath respectively, and each adjusting nut is threadedly connected with the corresponding strut.
[0013] Preferably, the fastening mechanism comprises a fastening nut, the side, away from the fastening frame, of each fastening rod is provided with a fastening thread, the fastening nut is threadedly connected with the corresponding fastening rod through the fastening thread, and each fastening nut is abutted against the strut.
[0014] Preferably, the outside of the auger is provided with a plurality of through holes, and each sheath is welded and fixed with the auger after passing through the corresponding through hole.
[0015] Preferably, the number of sheaths is four, and the plurality of fastening rods are arranged in a cross shape.
[0016] Compared with the prior art, the utility model has the following beneficial effects:
[0017] 1. The utility model has a fastening frame and a fastening rod, can make a plurality of struts become a whole under the action of a fastening nut, a fastening rod and a fastening frame, connect the auger and the large jar cylinder of the coal mill, can not only reduce the probability that the struts and sheaths fall off together due to the cracking of the weld at the contact part of the sheath and the auger, but also play the roles of supporting and limiting.
[0018] 2. This utility model has a dustproof nut. By setting the dustproof nut, it can prevent coal powder, crushed steel balls, slag, stones and other debris from entering the gap formed by the inner hole of the fixing component and the insertion part of one end of the support rod, so as to prevent the support rod from being abrasively worn, thinned and eventually broken. At the same time, the dustproof nut can also provide support for the support rod.
[0019] 3. This utility model has an adjusting nut, which can adjust the centering of the auger to make its rotation more stable. Attached Figure Description
[0020] Fig. 1 This is a schematic diagram of the overall structure of this utility model.
[0021] Fig. 2 This is a schematic diagram showing the fit between the fastening nut and the fastening rod in this utility model.
[0022] Fig. 3 This is a schematic diagram showing the position of the dustproof nut in this utility model.
[0023] In the diagram: 1. Screw; 2. Sheath; 3. Support rod; 4. Fixing component; 5. Adjusting nut; 6. Fastening bracket; 7. Fastening nut; 8. Dustproof nut; 9. Fastening rod. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] The following is in conjunction with the appendix Figs. 1-3 The specific embodiments of this utility model will be described in further detail.
[0026] Depend on Figs. 1-3 As shown, this utility model includes an auger 1, a fixing component 4 for power transmission, and multiple protective sleeves 2. In order to increase the service life of the auger 1, the middle part of each protective sleeve 2 passes through the side wall of the auger 1 and is fixedly connected to the auger 1. Each protective sleeve 2 has a support rod 3 installed inside, and the outer side of each support rod 3 is connected to the fixing component 4. The support rod 3 is provided with an adjustment mechanism for adjusting the front and rear position of the protective sleeve 2 relative to the support rod 3. The adjustment mechanism and the support rod 3 cooperate to form a structure in the center of the auger 1. A fastening frame 6 is provided in the center inside the auger 1. The outer side of the fastening frame 6 is fixedly connected with fastening rods 9 corresponding to the support rods 3. Each fastening rod 9 is arranged radially along the auger 1. The outer side of each fastening rod 9 is provided with a fastening mechanism for supporting the support rod 3.
[0027] It should be noted that the auger 1, i.e. the screw conveyor of the steel ball mill, is used to transport the coal blocks to a high place, and the fixing assembly 4 is the existing structure of the end face of the mill barrel, which is generally called an angle tile recess, a dovetail or a swallow tail, and is used to provide power for the rotation of the auger 1 and provide the torque required for the rotation of the auger 1. The specific structure is not limited too much here;
[0028] Further, as shown in Figs. 1-3 In order to increase the service life of the support rod 3, an outer thread is formed on one side of each support rod 3 close to the fixing assembly 4, and a dustproof nut 8 is threadedly connected to the outside of the outer thread. The dustproof nut 8 is a prior art and will not be described too much here. The side of the dustproof nut 8 close to the fixing assembly 4 abuts against the fixing assembly 4.
[0029] By arranging the dustproof nut 8, the phenomenon of grinding wear and breakage of the support rod 3 caused by the entry of coal dust, crushed steel ball slag, stones and other sundries into the gap formed between the inner hole of the fixing assembly 4 and the inserted part of one end of the support rod 3 can be prevented. At the same time, the dustproof nut 8 can also support the support rod 3.
[0030] Further, as shown in Figs. 1-3 In order to maintain the centricity of the rotation of the auger 1, the adjusting mechanism includes two adjusting nuts 5, and the two adjusting nuts 5 are arranged at the two ends of the corresponding sheath 2. Each adjusting nut 5 is threadedly connected to the corresponding support rod 3.
[0031] In use, the position of the sheath 2 can be adjusted by the adjusting nut 5. Since the sheath 2 is fixedly connected to the auger 1, the auger 1 can be indirectly centered and aligned with respect to the mill barrel.
[0032] Further, as shown in Figs. 1-3 In order to enable the plurality of support rods 3 to form a whole to support the auger 1, the fastening mechanism includes a fastening nut 7. Each fastening rod 9 is provided with a fastening thread on the side away from the fastening frame 6. The fastening nut 7 is threadedly connected to the corresponding fastening rod 9 through the fastening thread. Each fastening nut 7 abuts against the support rod 3.
[0033] In use, the fastening nut 7 can be reversely rotated to be close to the corresponding support rod 3 and fastened between the fastening nut 7 and the support rod 3. Then, spot welding is performed to connect the plurality of support rods 3 into a whole under the action of the fastening nut 7, the fastening rod 9 and the fastening frame 6, so as to connect the auger 1 and the mill barrel.
[0034] Further, as shown in Figs. 1-3 The auger 1 is provided with a plurality of through holes on the outside. Each sheath 2 passes through the corresponding through hole and is welded and fixed to the auger 1. The number of sheaths 2 is four, and the plurality of fastening rods 9 are arranged in a cross shape.
[0035] It needs to be specified that after the auger 1 is loaded into the large canister body of the coal mill, the sheath 2 is first inserted into the hole in the sidewall of the auger 1, and the welding of the contact surface at both ends is welded; the support rod 3 is inserted into the sheath 2 to adjust the auger 1 to the center position of the large canister body of the coal mill, and after adjustment, the adjusting nut 5 is fastened, so that the auger 1 is located at the center of the large canister body of the coal mill (note that after the support rod 3 is inserted into the central hole of the sheath 2, the adjusting nut 5 and the dustproof nut 8 on one side of the sheath 2 are simultaneously sleeved on the head of the support rod 3 to facilitate subsequent installation); after confirming that the center position of the auger 1 is correct, the dustproof nut 8 is rotated to be flush with the plane of the fixed assembly 4, so that it is in abutment with the fixed assembly 4, and after fastening, the angle weld at the dustproof nut 8 and the support rod 3 is spot welded to prevent the dustproof nut 8 from loosening and failing during operation; the main purpose of installing the dustproof nut 8 is to prevent the gap formed between the inner hole of the fixed assembly 4 and the inserted part of one end of the support rod 3 from entering coal powder, broken steel ball slag, stones and other sundries, which can cause abrasive wear of the support rod 3 and cause the support rod 3 to become thin and then break;
[0036] Then the cross-shaped fastening rod 9 is placed at the tail position of the four support rods 3, and the fastening nut 7 is rotated outward relative to the fastening rod 9, so that it is rotated to be in contact with and locked by the tail of the support rod 3 (note that when adjusting the fastening nut 7, the fastening frame 6 and the fastening rod 9 must be kept at the center position of the auger 1). After the fastening nut 7 is fastened and stressed, the angle weld at the contact part of the fastening nut 7 and the tail of the support rod 3 is spot welded to prevent the fastening nut 7 from loosening and failing during operation; the main purpose of installing the fastening frame 6 and the fastening rod 9 is to prevent the support rod 3 from falling off together with the sheath 2 due to the cracking of the weld at the contact part of the sheath 2 and the auger 1, and to play a supporting and limiting role.
[0037] After the installation of the utility model, the fastening frame 6 and the fastening rod 9 make the plurality of support rods 3 form a cross-shaped whole, which can make the connection between the auger 1 and the large canister body of the coal mill form a whole, and when rotating synchronously with the auger 1, it is more stable and can prevent the support rod 3 from breaking and falling off at any time.
[0038] The utility model has novel structure, clever idea, simple and convenient operation, effectively increases the service life of the auger 1 and the service life of the support rod 3 through the design, keeps the central nature of the rotation of the auger 1, and makes the plurality of support rods 3 form a whole to support the auger 1, thereby increasing the stability of power transmission;
[0039] In addition, through the design, in terms of labor: the utility model effectively avoids the labor cost caused by the shutdown and maintenance of the coal mill due to the breaking and falling off of the support rod 3.
[0040] In the material aspect: the utility model all adopts carbon steel material production, simple structure reduces the material cost expenditure. Simultaneously the material cost expenditure needed in the replacement of supporting rod 3 is saved.
[0041] In the safety aspect: the risk of toxic and harmful gas poisoning, the lung dust injury caused by coal powder inhalation, and the risk of scalding caused by loose supporting rod 3 in the repair process is avoided, and the risk of safe operation of the non-scheduled shutdown of the coal mill is also avoided.
[0042] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.
Claims
1. A steel ball mill screw conveyor support structure comprising an auger, a fixed assembly for power transmission and a plurality of sheaths, characterised in that: The middle part of each of the sheaths passes through the sidewall of the auger and is fixedly connected with the auger, the inside of each of the sheaths is sleeved with a supporting rod, the outside of each of the supporting rods is connected with the fixed assembly, the supporting rod is provided with an adjusting mechanism for adjusting the front and back positions of the sheath relative to the supporting rod, the adjusting mechanism and the supporting rod are matched to form the structure of the auger in the middle, the inside of the auger is centrally provided with a fastening frame, the outside of the fastening frame is fixedly connected with a fastening rod corresponding to the supporting rod, each of the fastening rods is arranged along the radial direction of the auger, and the outside of each of the fastening rods is provided with a fastening mechanism for supporting the supporting rod.
2. A spiral conveyor support structure for a steel ball mill as claimed in claim 1, characterised in that: The side, close to the fixed assembly, of each of the supporting rods is provided with an external thread, the outside of the external thread is threadedly connected with a dustproof nut, and the side, close to the fixed assembly, of the dustproof nut is abutted against the fixed assembly.
3. A spiral conveyor support structure for a steel ball mill as defined in claim 1, wherein: The adjusting mechanism comprises two adjusting nuts, the two adjusting nuts are arranged at the two ends of the corresponding sheath respectively, and each of the adjusting nuts is threadedly connected with the corresponding supporting rod.
4. A spiral conveyor support structure for a steel ball mill as defined in claim 1, wherein: The fastening mechanism comprises a fastening nut, the side, away from the fastening frame, of each of the fastening rods is provided with a fastening thread, the fastening nut is threadedly connected with the corresponding fastening rod through the fastening thread, and each of the fastening nuts is abutted against the supporting rod.
5. A spiral conveyor support structure for a steel ball mill as defined in claim 1, wherein: The outside of the auger is provided with a plurality of through holes, and each of the sheaths is welded and fixed with the auger after passing through the corresponding through hole.
6. A spiral conveyor support structure for a steel ball mill as defined in claim 1, wherein: The number of the sheaths is four, and the plurality of fastening rods are arranged in a cross shape.