Rapping device for lower frame body of medium-speed coal mill

Abstract

The utility model belongs to the technical field of coal mills, and particularly relates to a rapping device for a lower frame body of a medium-speed coal mill, which comprises an air seal chamber, a quick fixing component is mounted on the outer wall of the air seal chamber, a vibrating and striking component is mounted on the outer side of the quick fixing component, and a wire is fixedly connected to the side of the vibrating and striking component. The bottom end of the wire is fixedly connected with a control cabinet. The vibration striking assembly comprises a fixed shell, a motor is installed in the fixed shell, the top of the motor is rotationally connected with a rotary disc, the exterior of the rotary disc is fixedly connected with a metal rod, the outer wall of the metal rod is rotationally connected with a first rotary shaft, and the top of the metal rod is fixedly connected with a check ring; according to the utility model, on the premise of reducing the workload, the reliability of equipment can be improved, the call of improving the quality and improving the efficiency of power enterprises is responded, meanwhile, the potential safety hazard in the maintenance operation process is eliminated, and the intrinsic safety is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mills, in particular to a lower frame rapping device for a medium-speed coal mill. Background Art

[0002] Coal mill is an important auxiliary equipment of power plant boiler. The first thing to do in coal mill management is to solve its "leakage"; the second is to carry out regular pre-maintenance combined with planned overhaul to ensure the safe, environmentally friendly, economical and stable operation of coal mill. The leakage of ash and powder in the lower frame of coal mill is a common defect in production and operation. The seal of the lower frame of coal mill can play a good role in blocking the operation. However, there is a problem that the main material of the lower frame seal, the carbon ring, is easy to wear.

[0003] The existing technical solutions mainly face two disadvantages: the carbon ring is easy to damage and slag inclusions cause jamming. The material properties of the carbon ring determine that although it is wear-resistant, it is fragile and easy to break. Under special working conditions, the carbon ring is damaged and the sealing effect is affected. Similarly, foreign matter such as ash leaked from the shaft seal is easy to block the carbon ring, causing it to get stuck and lose its elasticity, and the sealing effect is not achieved. The conclusion derived from these two aspects is that the cost of sealing the lower frame with the existing technology is high, the workload is increased, and there are safety hazards.

[0004] Therefore, in order to solve the above problems, a medium-speed coal mill lower frame rapping device is proposed. Utility Model Content

[0005] In order to make up for the shortcomings of the existing technology, the two main shortcomings of the existing technical solutions are solved: the carbon ring is easy to damage and the slag inclusion causes jamming. The material properties of the carbon ring determine that although it is wear-resistant, it is fragile and easy to break. Under special working conditions, the carbon ring is damaged and the sealing effect is affected; similarly, foreign matter such as ash leaked from the shaft seal is easy to block the carbon ring, causing it to get stuck and lose its elasticity, and its sealing effect is not achieved. The conclusion derived from these two aspects is that the cost of sealing the lower frame with the existing technology is high, the workload is increased, and there are safety hazards.

[0006] The technical solution adopted by the utility model to solve its technical problems is: the utility model describes a medium-speed coal mill lower frame vibration device, comprising an air sealing chamber, a quick fixing component is installed on the outer wall of the air sealing chamber, and a vibration striking component is installed on the outer side of the quick fixing component, a wire is fixedly connected to the side of the vibration striking component, and the bottom end of the wire is fixedly connected to the control cabinet; the vibration striking component comprises a fixed shell, a motor is installed inside the fixed shell, and a turntable is rotatably connected to the top of the motor, a metal rod is fixedly connected to the outside of the turntable, and the outer wall of the metal rod is rotatably connected to the first rotating shaft, and a retaining ring is fixedly connected to the top of the metal rod, a first push-pull rod is fixedly connected to the side of the first rotating shaft, and the bottom end of the first push-pull rod is fixedly connected to the second rotating rod, the outer wall of the second rotating rod is fixedly connected to the second push-pull rod, and the outer wall of the second push-pull rod is slidably connected to a limiting block, and a hammer is fixedly connected to the top of the limiting block.

[0007] Preferably, the fixed housing and the motor are integrated, and the motor and the turntable are arranged with their vertical central axes overlapping.

[0008] Preferably, the motor forms a transmission structure through a turntable and a metal rod, and the turntable and the metal rod are integrated.

[0009] Preferably, the metal rod and the retaining ring are arranged with their vertical central axes overlapping, and the metal rod and the retaining ring are arranged in an integrated manner.

[0010] Preferably, the first push-pull rod forms a rotating structure with the metal rod through the first rotating axis, and the second push-pull rod forms a rotation structure with the first rotating axis through the second rotating rod, and the second push-pull rod and the limit block form a sliding structure, the second push-pull rod and the hammer are integrated, and the material of the hammer is set to rubber material.

[0011] Preferably, the quick fixing assembly comprises a fixing plate, the internal thread of the fixing plate is connected with a bolt, the outer wall of the fixing plate is provided with a sliding groove, and the interior of the sliding groove is slidably connected with a sliding rod.

[0012] Preferably, the fixing plate forms a threaded detachable structure with the air sealing chamber through bolts, and the fixing plate forms a snap-fit ​​structure with the fixed shell through a slide groove and a slide rod, and the interior of the fixing plate is arranged to be hollow.

[0013] The utility model is beneficial in that:

[0014] 1. The utility model of the vibration device for the lower frame of the medium-speed coal mill not only eliminates the air and powder leakage of the original sealing device, prolongs the overhaul period of the seal of the lower frame of the coal mill, and reduces the labor intensity of manual labor, but also greatly reduces the current of the coal mill and the sealed fan, reduces power consumption, improves the economic efficiency of operation, and improves the operating conditions of the coal mill. In summary, the use of the utility model can improve the reliability of the equipment while reducing the workload, responding to the call of the power company to "improve quality and increase efficiency", and at the same time, eliminates the potential safety hazards in the maintenance process, achieving inherent safety.

[0015] 2. The utility model is provided with a quick fixing component, and a fixing plate is provided to engage with the rapping device for faster assembly. In terms of subsequent maintenance and replacement, the installation time of the rapping device can be reduced, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model as a whole viewed from the front;

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model as a whole viewed from above;

[0019] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model as a whole;

[0020] Figure 4 It is a schematic diagram of the cross-sectional structure of the vibration striking component of the utility model;

[0021] Figure 5 It is a schematic diagram of the opening structure of the quick fixing component of the utility model.

[0022] In the figure: 1. vibration striking component; 2. quick fixing component; 3. wire; 4. control cabinet; 5. air sealing chamber; 101. fixed shell; 102. motor; 103. turntable; 104. metal rod; 105. first rotating axis; 106. retaining ring; 107. first push-pull rod; 108. second rotating rod; 109. limit block; 110. hammer; 111. second push-pull rod; 201. fixed plate; 202. bolt; 203. slide groove; 204. slide rod. DETAILED DESCRIPTION

[0023] 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 technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Embodiment 1

[0025] See also Figure 1 and Figure 5 The lower frame vibrating device of a medium-speed coal mill shown in the figure comprises an air seal chamber 5, the outer wall of the air seal chamber 5 is installed with a quick fixing component 2, and the outer side of the quick fixing component 2 is installed with a vibrating striking component 1, the side of the vibrating striking component 1 is fixedly connected with a wire 3, and the bottom end of the wire 3 is fixedly connected with a control cabinet 4; the vibrating striking component 1 comprises a fixed shell 101, the interior of the fixed shell 101 is installed with a motor 102, and the top of the motor 102 is rotatably connected with a turntable 103, the outside of the turntable 103 is fixedly connected with a metal rod 104, and the outer wall of the metal rod 104 is rotatably connected with a first The first rotating shaft 105 is fixedly connected to the side of the first rotating shaft 105, and the bottom end of the first push-pull rod 107 is fixedly connected to the second rotating rod 108, the outer wall of the second rotating rod 108 is fixedly connected to the second push-pull rod 111, and the outer wall of the second push-pull rod 111 is slidably connected to the limit block 109, and the top of the limit block 109 is fixedly connected to the hammer 110; the fixed shell 101 and the motor 102 are integrated, and the motor 102 and the turntable 103 are arranged with the vertical central axis coinciding.

[0026] The motor 102 forms a transmission structure with the turntable 103 and the metal rod 104, and the turntable 103 and the metal rod 104 are integrated; the metal rod 104 and the retaining ring 106 are arranged with the vertical central axis coinciding with each other, and the metal rod 104 and the retaining ring 106 are integrated; the first push-pull rod 107 forms a rotating structure with the metal rod 104 through the first rotating axis 105, and the second push-pull rod 111 rotates with the first rotating axis 105 through the second rotating rod 108, and the second push-pull rod 111 and the limit block 109 form a sliding structure, the second push-pull rod 111 and the hammer 110 are integrated, and the material of the hammer 110 is set to rubber material.

[0027] See also Figure 5A rapping device for the lower frame of a medium-speed coal mill is shown, wherein the internal thread of a fixed plate 201 is connected with a bolt 202, and a slide groove 203 is provided on the outer wall of the fixed plate 201, and a slide rod 204 is slidably connected inside the slide groove 203; the fixed plate 201 forms a threaded detachable structure with the air sealing chamber 5 through the bolt 202, and the fixed plate 201 forms a clamping structure with the fixed shell 101 through the slide groove 203 and the slide rod 204, and the interior of the fixed plate 201 is set to be hollow.

[0028] Working principle: First, the fixing plate 201 is installed in the middle position of each half ring of the gas sealing chamber 5 by means of bolts 202. The gas sealing chamber 5 is designed to be lightweight, and the gas sealing chamber 5 is a structural circle composed of four half rings, which is convenient for installing and replacing seals at the bottom of the coal mill, thereby reducing the workload of coal mill maintenance personnel. After the fixing plate 201 is installed, the vibration striking assembly 1 is installed on the fixing plate 201 by engaging the slide groove 203 on the fixing plate 201 with the slide rod 204 on the fixed shell 101. After the installation of the whole set of coal mill lower frame vibration device is completed, the lower frame gas sealing chamber 5 is vibrated regularly in operation according to the slag discharge method and operating procedures. Beat to ensure that the spring and carbon ring in the air sealing chamber are always in a tensioned state, so that it can achieve a good sealing effect. During the vibration process, the control cabinet 4 controls the switch of the motor 102 through the wire 3. After the motor 102 is turned on, it drives the turntable 103 to rotate. When the turntable 103 rotates, it drives the metal rod 104 to also make a circular motion. While the metal rod 104 moves, it drives the first push-pull rod 107 to extend and retract under the action of the first rotating shaft 105. The first push-pull rod 107 also drives the second push-pull rod 111 to make a translational motion under the action of the positioning block 109 through the second rotating rod 108, driving the hammer 110 to vibrate the air sealing chamber 5 to complete the work.

[0029] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A medium-speed coal mill lower frame vibrating device, characterized in that: It comprises an air-sealing chamber (5), the outer wall of the air-sealing chamber (5) is installed with a quick fixing assembly (2), and the outer side of the quick fixing assembly (2) is installed with a vibration striking assembly (1), the side of the vibration striking assembly (1) is fixedly connected with a wire (3), and the bottom end of the wire (3) is fixedly connected with a control cabinet (4); The vibration striking assembly (1) comprises a fixed shell (101), a motor (102) is installed inside the fixed shell (101), and the top of the motor (102) is rotatably connected to a turntable (103), the outside of the turntable (103) is fixedly connected to a metal rod (104), and the outer wall of the metal rod (104) is rotatably connected to a first rotating shaft (105), and the top of the metal rod (104) is fixedly connected to a retaining ring (106), the side of the first rotating shaft (105) is fixedly connected to a first push-pull rod (107), and the bottom end of the first push-pull rod (107) is fixedly connected to a second rotating rod (108), the outer wall of the second rotating rod (108) is fixedly connected to a second push-pull rod (111), and the outer wall of the second push-pull rod (111) is slidably connected to a limit block (109), and the top of the limit block (109) is fixedly connected to a hammer (110).

2. A medium-speed coal mill lower frame rapping device according to claim 1, characterized in that: The fixed housing (101) and the motor (102) are integrated, and the motor (102) and the rotating disk (103) are arranged with their vertical central axes overlapping.

3. A medium-speed coal mill lower frame rapping device according to claim 1, characterized in that: The motor (102) forms a transmission structure through a rotating disk (103) and a metal rod (104), and the rotating disk (103) and the metal rod (104) are integrally arranged.

4. A medium-speed coal mill lower frame rapping device according to claim 1, characterized in that: The metal rod (104) and the retaining ring (106) are arranged with their vertical central axes overlapping, and the metal rod (104) and the retaining ring (106) are arranged in an integrated manner.

5. The medium-speed coal mill lower frame rapping device according to claim 1, characterized in that: The first push-pull rod (107) forms a rotating structure with the metal rod (104) through the first rotating shaft (105), and the second push-pull rod (111) forms a rotating structure with the first rotating shaft (105) through the second rotating rod (108), and the second push-pull rod (111) and the limit block (109) form a sliding structure, the second push-pull rod (111) and the hammer (110) are integrated, and the material of the hammer (110) is set to be rubber material.

6. A medium-speed coal mill lower frame rapping device according to claim 1, characterized in that: The quick fixing assembly (2) comprises a fixing plate (201), the fixing plate (201) is internally threadedly connected with a bolt (202), the outer wall of the fixing plate (201) is provided with a sliding groove (203), and the interior of the sliding groove (203) is slidably connected with a sliding rod (204).

7. A medium-speed coal mill lower frame rapping device according to claim 6, characterized in that: The fixing plate (201) forms a threaded detachable structure with the air sealing chamber (5) via bolts (202), and the fixing plate (201) forms a snap-fit ​​structure with the fixing housing (101) via a sliding groove (203) and a sliding rod (204), and the interior of the fixing plate (201) is arranged to be hollow.

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