Anti-falling support for grinding roller of coal mill

Abstract

The utility model discloses an anti-falling bracket for a grinding roller of a coal mill. The anti-falling bracket comprises a grinding disc, a supporting seat, a supporting shaft, a mounting seat, a lifting lug, the grinding roller, a hydraulic pull rod and an anti-falling device, the anti-falling device has the beneficial effects that the anti-falling device is arranged, so that the conditions that the mounting seat rotates and the grinding roller hits a millstone due to abnormity of a hydraulic oil system when the grinding roller is maintained are effectively avoided, the safety of personnel entering the coal mill to maintain the grinding roller is improved, and when the grinding roller is lifted to a high position, the safety of the personnel is improved. The anti-falling device is arranged at the joint of the lifting lug and the hydraulic pull rod, so that the grinding roller is influenced by the anti-falling device and is kept in a high-position fixed state, the influence caused by abnormity of a hydraulic oil system is weakened, the grinding roller is always kept at the high position during maintenance, and the safety during maintenance of the grinding roller is improved.

Description

Technical Field

[0001] The utility model relates to a coal mill, in particular to a falling prevention bracket for the grinding roller of a coal mill. Background Art

[0002] A coal mill is a machine that crushes coal blocks and grinds them into pulverized coal. It is an important auxiliary equipment for a pulverized coal boiler and has models such as vertical pulverizers, high-pressure hanging roller mills, medium-speed micro-pulverizers, super-pressure trapezoidal mills, Raymond mills, etc. The coal grinding process is a process in which coal is crushed and its surface area continuously increases. To increase the new surface area, the binding force between solid molecules must be overcome, so energy consumption is required. Coal is ground into pulverized coal in a coal mill mainly through three methods: crushing, smashing, and grinding.

[0003] During the maintenance period of the current coal mill, personnel need to enter the interior of the coal mill for inspection. When the grinding roller of the coal mill is lifted by means of a hydraulic oil system, if the hydraulic oil system fails and stops abnormally, there is a risk that the grinding roller of the coal mill will suddenly fall onto the grinding table, resulting in casualties or equipment damage, which is not conducive to the safe maintenance and repair of the grinding roller of the coal mill. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a falling prevention bracket for the grinding roller of a coal mill.

[0005] The purpose of the utility model is achieved by the following technical solutions: A falling prevention bracket for the grinding roller of a coal mill, comprising a grinding table, a support seat, a support shaft, a mounting seat, a lifting lug, a grinding roller, a hydraulic pull rod, and a falling prevention device;

[0006] A support shaft is fixed in the middle of the support seat, and a mounting seat is rotatably connected to the outside of the support shaft;

[0007] A grinding roller is installed at the right end of the mounting seat, and a lifting lug is fixed at the left end of the mounting seat;

[0008] A falling prevention device is embedded in the lifting lug, and the hydraulic pull rod is locked and fixed to the falling prevention device by a nut;

[0009] The falling prevention device comprises a fixed seat, a mounting groove, a sliding groove, a fixing plate, a reinforcing plate, a sliding auxiliary member, and a connecting rod. The fixed seat is embedded into the left end of the support seat to the right, and is locked and fixed to the support seat by bolts. A sliding groove is opened at the top of the fixed seat, and a fixing plate is slidably connected to the inside of the sliding groove. A reinforcing plate is fixed to the left end of the fixing plate, and the reinforcing plate is locked and fixed to the fixed seat by bolts. The sliding auxiliary member is installed inside the fixing plate, and the inner side of the sliding auxiliary member is in rolling connection with the connecting rod. The connecting rod is respectively embedded into the lifting lug and the hydraulic pull rod.

[0010] Preferably, the sliding auxiliary component includes a base plate, a connecting plate, a rolling component, and a fixed plate. The base plate is fixed to the fixed plate by bolts, a connecting plate is fixed to the front end of the base plate, the rolling component is welded to the inside of the front end of the connecting plate, the rear end of the fixed plate is fixed to the connecting plate, and the inner side of the rolling component is rollingly connected to the connecting rod.

[0011] Further preferably, the hydraulic pull rod is locked and fixed with nuts and connecting rods, and a preliminary connection is achieved by passing the connecting rod through both sides of the hydraulic pull rod and the lifting lugs in sequence. Then, the hydraulic pull rod is limited between the two sets of nuts through threaded connection with the connecting rod, thereby achieving a stable connection between the hydraulic pull rod, the lifting lugs and the connecting rod.

[0012] Further preferably, a mounting groove is provided at the right end of the fixing seat for positioning, so as to facilitate stable connection between the fixing seat and the supporting seat and to facilitate stable installation of the fixing seat on the left end of the supporting seat.

[0013] Further preferably, the sliding grooves, fixed plates and sliding auxiliary parts are each provided with two groups, which are symmetrically distributed front and back to facilitate movement toward each other, embedded in the front and rear ends of the connecting rod, and fastened to the top of the fixed seat through the fixed plate, so as to limit the connecting rod, thereby limiting the movement of the mounting seat, the lifting ear and the grinding roller, so that the grinding roller can always be kept in this high position during maintenance, thereby avoiding the rotation of the mounting seat caused by abnormality of the hydraulic oil system, causing the grinding roller to fall back and hit the grinding disc, thereby improving the safety during the maintenance of the grinding roller.

[0014] Further preferably, the cross section of the sliding groove is "convex", which effectively limits the fixed plate, allowing the fixed plate to slide stably in the sliding groove and preventing it from falling out of the sliding groove.

[0015] Further preferably, the rolling elements are provided in multiple groups and are distributed equidistantly around the circumference to facilitate rolling connection with the connecting rod. By virtue of the rolling of the beads on the rolling elements, the speed and smoothness of the sliding auxiliary element passing through the connecting rod are improved, thereby avoiding jamming when the connecting rod is embedded, and improving the smoothness and convenience of installation and connection.

[0016] Further preferably, the rolling element is made of high manganese steel, which has high strength, strong wear resistance, is not prone to deformation, and is highly practical.

[0017] The utility model has the following advantages:

[0018] The utility model effectively avoids the situation that when the grinding roller is under maintenance, the mounting seat rotates due to the abnormal hydraulic oil system, and the grinding roller hits the grinding table by setting a fall prevention device, which improves the safety of personnel entering the inside of the coal mill to maintain the grinding roller. When the grinding roller is lifted to a high position, by installing the fall prevention device at the connection of the lifting lug and the hydraulic pull rod, the grinding roller is affected by the fall prevention device and maintained in a fixed state at a high position, weakening the influence caused by the abnormal hydraulic oil system, so that the grinding roller is always kept at a high position during maintenance, thereby improving the safety during the maintenance of the grinding roller.

[0019] The utility model sets a sliding auxiliary part, so that when the two fixed plates move towards each other, the connection with the connecting rod is smoother, avoiding jamming when the connecting rod is inserted, which affects the installation efficiency of the fixed plate. Among them, the friction between the sliding auxiliary part and the connecting rod is mainly reduced by the rolling connection between the rolling beads in the rolling part and the connecting rod, thereby improving the smoothness of installation, and further improving the connection efficiency of the fall prevention device, making the installation of the fall prevention device more labor-saving and convenient. Description of the Drawings

[0020] Figure 1 is a schematic side structure view of the utility model;

[0021] Figure 2 is a schematic three-dimensional structure view of the fall prevention device of the utility model;

[0022] Figure 3 is a schematic three-dimensional structure view of the fall prevention device of the utility model;

[0023] Figure 4 is a schematic sectional structure view of the fall prevention device of the utility model;

[0024] Figure 5 is a schematic three-dimensional structure view of the sliding auxiliary part of the utility model;

[0025] Figure 6 is a schematic internal structure view of the sliding auxiliary part of the utility model.

[0026] In the figure, 1 - grinding table, 2 - support seat, 3 - support shaft, 4 - mounting seat, 5 - lifting lug, 6 - grinding roller, 7 - hydraulic pull rod, 8 - fall prevention device, 81 - fixed seat, 82 - installation groove, 83 - sliding groove, 84 - fixed plate, 85 - reinforcing plate, 86 - sliding auxiliary part, 87 - connecting rod, 861 - base plate, 862 - connecting plate, 863 - rolling part, 864 - fixed plate one. Detailed Implementation Manner

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are a part rather than all of the embodiments of the present utility model. The components of the embodiments of the present utility model usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0029] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0030] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0031] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship when the product of this utility model is normally placed, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0033] Such as Figure 1As shown in the figure, the anti-drop bracket for the grinding roller of the coal mill includes a grinding table 1, a support base 2, a support shaft 3, a mounting base 4, a lifting lug 5, a grinding roller 6, a hydraulic tie rod 7, and an anti-drop device 8. A support shaft 3 is fixed in the middle of the support base 2, and a mounting base 4 is rotatably connected to the outside of the support shaft 3. A grinding roller 6 is installed at the right end of the mounting base 4, and a lifting lug 5 is fixed at the left end of the mounting base 4. An anti-drop device 8 is embedded inside the lifting lug 5, and the hydraulic tie rod 7 is locked and fixed to the anti-drop device 8 by a nut.

[0034] In this embodiment, the hydraulic tie rod 7 is locked and fixed to the connecting rod 87 by a nut. By passing the connecting rod 87 through both sides of the hydraulic tie rod 7 and the lifting lug 5 in sequence, preliminary connection is achieved. Then, through the threaded connection between two groups of nuts and the connecting rod 87, the hydraulic tie rod 7 is limited between the two groups of nuts, thereby realizing the stable connection between the hydraulic tie rod 7, the lifting lug 5, and the connecting rod 87.

[0035] As Figures 2 - 4 shown in the figure, for the anti-drop bracket of the grinding roller of the coal mill, the anti-drop device 8 includes a fixed seat 81, a mounting groove 82, a sliding groove 83, a fixing plate 84, a reinforcing plate 85, a sliding auxiliary member 86, and a connecting rod 87. The fixed seat 81 is embedded into the left end of the support base 2 to the right, and is locked and fixed to the support base 2 by bolts. A sliding groove 83 is opened at the top of the fixed seat 81, and a fixing plate 84 is slidably connected inside the sliding groove 83. A reinforcing plate 85 is fixed to the left end of the fixing plate 84, and the reinforcing plate 85 is locked and fixed to the fixed seat 81 by bolts. The sliding auxiliary member 86 is installed inside the fixing plate 84, and the inner side of the sliding auxiliary member 86 is in rolling connection with the connecting rod 87. The connecting rod 87 is respectively embedded inside the lifting lug 5 and the hydraulic tie rod 7.

[0036] In this embodiment, a mounting groove 82 is provided at the right end of the fixed seat 81 for positioning, so as to facilitate the stable connection between the fixed seat 81 and the support seat 2, and to facilitate the stable installation of the fixed seat 81 on the left end of the support seat 2. Two groups of sliding grooves 83, fixing plates 84, and sliding auxiliary parts 86 are provided, which are symmetrically distributed front and back, so as to facilitate the movement toward each other, and are embedded in the front and rear ends of the connecting rod 87, and are fastened to the top of the fixed seat 81 through the fixing plate 84, so as to limit the connection rod 87, thereby limiting the activities of the mounting seat 4, the lifting ear 5, and the grinding roller 6, so that the grinding roller 6 is always kept at this high position during the maintenance, thereby avoiding the rotation of the mounting seat 4 caused by the abnormality of the hydraulic oil system, causing the grinding roller 6 to fall back. The situation of hitting the grinding disc 1 occurs, which improves the safety of the grinding roller 6 during maintenance. Among them, the symmetrical installation of the sliding auxiliary part 86 makes it easy for the sliding auxiliary part 86 to stably slide and connect with the connecting rod 87 under the action of the base plate 861. The cross section of the sliding groove 83 is "convex", which effectively limits the fixed plate 84, so that the fixed plate 84 can slide stably in the sliding groove 83 to avoid it from escaping from the sliding groove 83. The cross section of the reinforcing plate 85 is "L" shaped, and the cross fixation is achieved by embedding the bolts at the upper end and the left end. The two sets of mutually perpendicular bolts are used to fix and suppress the vibrations caused in the vertical and horizontal directions, which effectively reduces the loosening of the bolts and achieves stable fixation.

[0037] Among them, both ends of the connecting rod 84 are inclined inward to facilitate the installation of the sliding auxiliary part 86, and two sets of threaded areas are set on the outer side of the connecting rod 84 for connecting nuts. By screwing in the nuts, the hydraulic pull rod 7 is tightened and limited.

[0038] like Figures 5 - 6 As shown, the coal mill roller anti-drop bracket, the sliding auxiliary component 86 includes a base plate 861, a connecting plate 862, a rolling component 863, and a fixed plate 864. The base plate 861 is fixed to the fixed plate 84 by bolts. The front end of the base plate 861 is fixed with the connecting plate 862, the rolling component 863 is welded to the inside of the front end of the connecting plate 862, the rear end of the fixed plate 864 is fixed to the connecting plate 862, and the inner side of the rolling component 863 is rollingly connected to the connecting rod 87.

[0039] In the utility model, multiple groups of rolling members 863 are arranged, which are evenly distributed around the circumference, so as to facilitate rolling connection with the connecting rod 87. By virtue of the rolling of the beads on the rolling member 863, the speed and smoothness of the sliding auxiliary member 86 passing through the connecting rod 87 are improved, and jamming when the connecting rod 87 is avoided, thereby improving the smoothness and convenience of installation and connection. The rolling member 863 is made of high manganese steel, has high strength, strong wear resistance and strong practicality.

[0040] The rolling element 863 is composed of a bracket and a ball bearing rotatably connected to the bracket, and the installation of the rolling element 863 is achieved by welding the bracket to the connecting plate 862 .

[0041] The working process of the present utility model is as follows: During maintenance, place the hydraulic pull rod 7 at the front and rear ends of the lifting lug 5, pass the connecting rod 87 through the middle parts of the hydraulic pull rod 7 and the lifting lug, and use two sets of nuts to screw in from both ends of the connecting rod 87 to fasten and limit the hydraulic pull rod 7. Then, by starting the hydraulic oil system, drive the hydraulic pull rod 7 to pull the mounting seat 4 and the grinding roller 6 to rotate around the support shaft 3, so as to lift the grinding roller 6 upward;

[0042] After the grinding roller is lifted, to ensure safety during maintenance, install the fixed seat 81 on the support seat 2 to achieve fixation. Then, move the fixing plate 84 inward so that it slides inside the sliding groove 83 until the fixing plate 84 slides outside the connecting rod 87. Then, fix the fixing plate 84 and the reinforcing plate 85 on the fixed seat 81 through bolts to fix the fixing plate 84, thereby using the fixing plate 84 to stabilize the position of the connecting rod 87, preventing the connecting rod 87 from changing its position, and thus avoiding the situation where the mounting seat 4 and the grinding roller 6 rotate and fall on the grinding disc 1 due to abnormal operation of the hydraulic oil system, improving the safety during maintenance of the grinding roller 6;

[0043] During the process of the fixing plate 84 sliding into the connecting rod 87, affected by the rolling member 863, the friction between the sliding auxiliary member 86 and the connecting rod 87 is greatly reduced, realizing smooth sliding in, improving the installation efficiency, and reducing the occurrence of jamming.

[0044] Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. Coal mill roller anti-drop bracket, characterized in that: It includes a grinding disc (1), a support base (2), a support shaft (3), a mounting base (4), a lifting lug (5), a grinding roller (6), a hydraulic tie rod (7), and a fall prevention device (8); A support shaft (3) is fixed in the middle of the support base (2), and a mounting base (4) is rotatably connected to the outside of the support shaft (3); A grinding roller (6) is installed at the right end of the mounting base (4), and a lifting lug (5) is fixed at the left end of the mounting base (4); A fall prevention device (8) is embedded in the inside of the lifting lug (5), and the hydraulic tie rod (7) is locked and fixed to the fall prevention device (8) by a nut; The fall prevention device (8) includes a fixed seat (81), a mounting groove (82), a sliding groove (83), a fixing plate (84), a reinforcing plate (85), a sliding auxiliary member (86), and a connecting rod (87). The fixed seat (81) is embedded into the left end of the support base (2) towards the right, and it is locked and fixed to the support base (2) by bolts. A sliding groove (83) is opened at the top of the fixed seat (81), and a fixing plate (84) is slidably connected to the inside of the sliding groove (83). A reinforcing plate (85) is fixed to the left end of the fixing plate (84), and the reinforcing plate (85) is locked and fixed to the fixed seat (81) by bolts. The sliding auxiliary member (86) is installed inside the fixing plate (84), and the inner side of the sliding auxiliary member (86) is in rolling connection with the connecting rod (87). The connecting rod (87) is respectively embedded into the inside of the lifting lug (5) and the hydraulic tie rod (7).

2. The grinding roller anti-drop bracket of the coal mill according to claim 1, characterized in that: The sliding auxiliary member (86) includes a base plate (861), a connecting plate (862), a rolling member (863), and a fixing plate one (864). The base plate (861) is bolted to the fixing plate (84). A connecting plate (862) is fixed to the front end of the base plate (861). The rolling member (863) is welded to the inside of the front end of the connecting plate (862). The rear end of the fixing plate one (864) is fixed to the connecting plate (862). The inner side of the rolling member (863) is in rolling connection with the connecting rod (87).

3. The anti-drop bracket for the grinding roller of the coal mill according to claim 1, characterized in that: The hydraulic tie rod (7) is locked and fixed to the connecting rod (87) by a nut.

4. The anti-drop bracket for the grinding roller of the coal mill according to claim 1, wherein: An installation groove (82) is opened at the right end of the fixed seat (81).

5. The anti-drop bracket for the grinding roller of the coal mill according to claim 1, characterized in that: Two sets of the sliding groove (83), the fixing plate (84), and the sliding auxiliary member (86) are provided and are symmetrically distributed front and back.

6. The anti-drop bracket for the grinding roller of the coal mill according to claim 1, characterized in that: The cross-section of the sliding groove (83) is in a "convex" shape.

7. The anti-drop bracket for the grinding roller of the coal mill according to claim 2, characterized in that: Multiple sets of the rolling members (863) are provided and are equidistantly distributed in a circle.

Images