De-clogging machine sealing structure

Abstract

This utility model relates to the field of sealing technology for unblocking machines, specifically to a sealing structure for an unblocking machine. The bottom of an upper fixed cylinder extends into a rotating cylinder, and the bottom of the rotating cylinder extends into a lower fixed cylinder. Rotational gaps are provided between the upper and rotating cylinders, and between the rotating and lower fixed cylinders. These gaps are filled with sealing filler to seal them. The rotational gaps can be straight or bent. To prevent leakage, the structure, with the bottom of the upper fixed cylinder extending into the rotating cylinder and the bottom of the rotating cylinder extending into the lower fixed cylinder, provides a first layer of interception for pulverized coal and pressurized air through the rotational gaps. The sealing filler within the rotational gaps provides a second layer of interception for the pulverized coal, enhancing the sealing performance of the joint between the two cylinders and ensuring that the rotating unblocking machine cylinder does not leak pulverized coal or air.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology for unblocking machines, and in particular to the sealing structure of unblocking machines. Background Technology

[0002] The rotary unblocking machine cylinder, also known as the raw coal cylinder unblocking machine, non-sticky rotary raw coal cylinder unblocking machine, anti-blocking material cylinder, raw coal cylinder unblocking machine, and anti-blocking machine, can comprehensively solve the problem of material blockage during the falling process in large powder cylinders of thermal power plants, raw coal cylinders, and cement plants.

[0003] During the material feeding process in the material cylinder, arching and blockage often occur due to various reasons. The rotating part of the rotary unblocking machine cylinder is located at the highest probability of blockage. During the rotation, the unblocking components arranged on the inner wall of the rotating body create a material disturbance zone between the material and the cylinder wall, preventing the material from forming an arch foundation on the cylinder wall and thus preventing blockage. When the rotary unblocking machine cylinder is running, the material flow inside the rotating cylinder is forced into a unified flow. This flow changes the flow state of the material inside the entire material cylinder in the form of diffusion flow, transforming the original center-dominated flow state into a unified flow state. This prevents the formation of flow dead zones near the cylinder wall in the lower part of the cylinder, greatly reducing the probability of blockage.

[0004] The basic structure of the rotary unblocking machine cylinder is a three-piece structure with a rotating cylinder in the middle and fixed cylinders at the top and bottom. In traditional rotary unblocking machines, the sealing structure between the cylinders is located on the outside. Under the pressure of the raw coal's own weight and the combined action of the internal components of the rotary unblocking machine and the air pressure of the coal mill, air leakage and powder leakage are likely to occur in the gap between the rotating cylinder and the adjacent fixed cylinder, which will pollute the work site and harm the health of the operation and maintenance personnel. In view of this, an intelligent sealing structure for the unblocking machine is provided. Utility Model Content

[0005] The main purpose of this utility model is to provide a sealing structure for a blockage clearing machine, so as to solve the problem in the related technology that the gap between the rotating cylinder and the adjacent fixed cylinder is prone to air leakage and powder leakage, which pollutes the work site and harms the health of maintenance personnel.

[0006] To achieve the above objectives, according to one aspect of the present invention, a sealing structure for a blockage clearing machine is provided, comprising at least a rotating blockage clearing machine cylinder. The blockage clearing machine cylinder is composed of a rotating cylinder in the middle, an upper fixed cylinder above the rotating cylinder, and a lower fixed cylinder below the rotating cylinder. The bottom of the upper fixed cylinder extends into the rotating cylinder, and the bottom of the rotating cylinder extends into the lower fixed cylinder. A rotation gap is reserved between the upper fixed cylinder and the rotating cylinder, and between the rotating cylinder and the lower fixed cylinder. The rotation gap is filled with sealing filler, which is used to seal the rotation gap.

[0007] The rotation gap can be either a straight-through structure or a bent structure.

[0008] Furthermore, support blocks are provided on both sides of the inner wall of the rotating gap near the bottom edge, and annular limiting protrusions are fixedly provided on the surface of the support blocks. Additionally, several strip-shaped limiting blocks are vertically provided on one side of the rotating gap along the inner wall of the rotating cylinder.

[0009] Furthermore, when the rotation gap is a bent structure, a support ear is fixedly provided on the inner wall of the rotating cylinder near the top edge, and a support ring is fixedly provided on the outer wall of the upper fixed cylinder. The support ring is located above the support ear, and a gap a is reserved between the support ring and the support ear, and a gap b is reserved between the upper fixed cylinder and the rotating cylinder. The gaps a and b together constitute the rotation gap of the bent structure. Similarly, a rotation gap of the same structure is provided between the rotating cylinder and the lower fixed cylinder.

[0010] The sealing filler slides into the bottom of the rotating gap along the strip-shaped limiting block and is inserted into the annular limiting protrusion.

[0011] Furthermore, when the rotation gap is a straight-through structure, a support ear is fixedly provided on the inner wall of the rotating cylinder near the top edge. A fixing ring is installed on the support ear and fixed to the support ear by bolts. The fixing ring is slidably installed on the outer wall of the upper fixed cylinder. The fixing ring is used to fix the sealing packing inside the rotation gap.

[0012] Furthermore, the bottom of the sealing packing is provided with a groove that engages with the annular limiting protrusion, and the side wall of the sealing packing is also provided with a sliding groove that matches the strip-shaped limiting block, and the sealing packing is a soft packing.

[0013] Furthermore, a pressure sensor is embedded in the inner wall of the rotating gap. The pressure sensor is used to monitor the air pressure change in the sealed rotating gap. Preferably, the pressure sensor is either a piezoresistive pressure sensor or a capacitive pressure sensor.

[0014] Furthermore, the width of the rotation gap is 0.01-10mm.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] In this unblocking machine's sealing structure, to prevent external leakage accidents, the bottom of the upper fixed cylinder extends into the rotating cylinder, and the bottom of the rotating cylinder extends into the lower fixed cylinder. The rotating gap provides a first layer of interception for pulverized coal and pressurized air, while the sealing filler filling the rotating gap provides a second layer of interception for the pulverized coal. This strengthens the sealing of the joint between the two cylinders, ensuring that the rotating unblocking machine's cylinder body is leak-proof of both pulverized coal and air. This simplifies maintenance, significantly reduces the labor intensity of workers, and correspondingly improves the level of civilized production at the work site. It provides strong support for the production and transportation management, equipment maintenance management, and civilized production management of coal conveying and pulverizing in thermal power plants. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the rotary unblocking machine cylinder in the preferred embodiment 1 of this utility model;

[0018] Figure 2 This is a partial cross-sectional view of the cylinder of the rotary unblocking machine in the preferred embodiment 1 of this utility model;

[0019] Figure 3 In the preferred embodiment 1 of this utility model Figure 2 Enlarged schematic diagram of the structure at point A;

[0020] Figure 4 This is a partial schematic diagram of the structure at point A in the preferred embodiment 1 of this utility model;

[0021] Figure 5 This is a partial cross-sectional view of the cylinder of the rotary unblocking machine in preferred embodiment 2 of this utility model;

[0022] Figure 6 In the preferred embodiment 2 of this utility model Figure 5 Enlarged schematic diagram of the structure at point B;

[0023] Figure 7 This is a partial schematic diagram of the structure at point B in the preferred embodiment 2 of this utility model.

[0024] Illustration:

[0025] 1. Upper fixed cylinder; 2. Rotating cylinder; 3. Lower fixed cylinder; 61. Support ear; 7. Fixed ring; 71. Support ring; 8. Strip-shaped limiting block; 9. Support block; 91. Annular limiting protrusion; 10. Rotation gap. Detailed Implementation

[0026] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0027] Example 1

[0028] Please see Figures 1-4 As shown, the purpose of this embodiment is to provide a sealing structure for a blockage clearing machine, which includes at least a rotating blockage clearing machine cylinder. The blockage clearing machine cylinder consists of a rotating cylinder 2 in the middle, an upper fixed cylinder 1 above the rotating cylinder 2, and a lower fixed cylinder 3 below the rotating cylinder 2, as detailed below. Figure 2 As shown, the bottom of the upper fixed cylinder 1 extends into the rotating cylinder 2, and the bottom of the rotating cylinder 2 extends into the lower fixed cylinder 3, effectively preventing leakage accidents from the dynamic-static joint between the bottom of the upper fixed cylinder 1 and the top of the rotating cylinder 2, and the dynamic-static joint between the bottom of the rotating cylinder 2 and the top of the lower fixed cylinder 3 when the coal flows downward.

[0029] Specifically, a rotation gap 10 is reserved between the upper fixed cylinder 1 and the rotating cylinder 2, and between the rotating cylinder 2 and the lower fixed cylinder 3. The rotation gap 10 specifically refers to the joint between the upper fixed cylinder 1 and the rotating cylinder 2, and the joint between the rotating cylinder 2 and the lower fixed cylinder 3. The rotation gap 10 is filled with sealing filler, which is used to seal the rotation gap 10.

[0030] The rotating gap 10 has a straight or bent structure, and its width is 0.01-10mm, which facilitates the installation of the sealing packing without affecting the sealing performance.

[0031] Furthermore, support blocks 9 are provided on both sides of the inner wall of the rotation gap 10 near the bottom edge to support the sealing packing and prevent the sealing packing from falling off the rotation gap 10. Annular limiting protrusions 91 are fixedly provided on the surface of the support blocks 9, and several strip-shaped limiting blocks 8 are vertically provided on one side of the rotation gap 10 along the inner wall of the rotating cylinder 2.

[0032] Specifically, when the rotation gap 10 is a bent structure, a support ear 61 is fixedly provided on the outer wall of the rotating cylinder 2 near the top edge, and a support ring 71 is fixedly provided on the outer wall of the upper fixed cylinder 1. The support ring 71 is located above the support ear 61, and a gap a is reserved between the support ring 71 and the support ear 61. A gap b is reserved between the upper fixed cylinder 1 and the rotating cylinder 2. The gaps a and b together constitute the bent structure of the rotation gap 10. Similarly, a rotation gap 10 with the same structure is provided between the rotating cylinder 2 and the lower fixed cylinder 3.

[0033] The sealing packing slides along the strip-shaped limiting block 8 into the bottom of the rotation gap 10 and is inserted into the annular limiting protrusion 91. The annular limiting protrusion 91 and the strip-shaped limiting block 8 together limit and fix the sealing packing. The annular limiting protrusion 91 and the strip-shaped limiting block 8 are located on different housings. The strip-shaped limiting block 8 limits the sealing packing, meaning that when the rotating cylinder 2 rotates, as... Figure 4As shown, the sealing packing is limited on one side of the upper fixed cylinder 1, and the other side of the sealing packing is constantly rubbed against the side wall of the rotating cylinder 2. Due to the limitation of the strip-shaped limiting block 8, the double-sided wear of the sealing packing can be prevented, thereby improving the service life of the sealing packing. At the same time, the annular limiting protrusion 91 is located on the wear surface side, and the sealing packing is inserted and installed on the annular limiting protrusion 91 for secondary sealing of the wear surface side.

[0034] Specifically, the bottom of the sealing packing is provided with a groove that engages with the annular limiting protrusion, and the side wall of the sealing packing is also provided with a sliding groove that matches the strip-shaped limiting block 8. The sealing packing is a soft packing, which can be any one of asbestos fabric, carbon fiber, rubber, flexible graphite or engineering plastic.

[0035] A pressure sensor is embedded in the inner wall of the rotation gap 10 and is installed on the wear surface side of the sealing packing. The pressure sensor is used to monitor the air pressure change in the sealed rotation gap 10. Preferably, the pressure sensor is either a piezoresistive pressure sensor or a capacitive pressure sensor.

[0036] Furthermore, the rotary unblocking machine cylinder is vertically installed in the conveying channel of the raw coal hopper, placing the rotating cylinder 2 of the rotary unblocking machine cylinder at the part of the entire conveying channel with the highest probability of material blockage. The raw coal falls from the channel into the upper fixed cylinder 1, then from the upper fixed cylinder 1 into the rotating cylinder 2, and finally falls into the conveying channel of the raw coal hopper through the lower fixed cylinder 3 to continue moving forward. When the rotary unblocking machine cylinder is running, the drive mechanism drives the rotating cylinder 2 to rotate at a constant speed. The flow of the raw coal in the rotating cylinder 2 is a forced overall flow, which changes the flow state of the material inside the entire rotary unblocking machine cylinder in the form of diffusion flow, changing the original flow state dominated by the center flow to the flow state dominated by the overall flow, thereby preventing the formation of flow dead zones near the cylinder wall of the raw coal in the upper fixed cylinder 1, and greatly reducing the probability of blockage of the raw coal in the rotary unblocking machine cylinder.

[0037] The sealing packing is pushed completely into the rotating gap 10 and filled to prevent coal dust and pressurized air from overflowing from the rotating gap 10 and polluting the working environment. The air pressure in the rotating gap 10 is monitored by a pressure sensor. If the air pressure is within the safe threshold, it indicates that the wear of the sealing packing is small and the sealing performance of the rotating gap 10 is acceptable. If the air pressure exceeds the safe threshold, it indicates that the wear of the sealing packing is large and the sealing performance of the rotating gap 10 has decreased, requiring replacement of the sealing packing. The rotating unblocking machine cylinder does not leak powder or air, making its maintenance work simple and easy, significantly reducing the labor intensity of workers, and correspondingly improving the level of civilized production at the work site. It provides strong support for the production and transportation management, equipment maintenance management, and civilized production management of coal conveying and pulverizing in thermal power plants.

[0038] Example 2

[0039] like Figures 5 to 7 As shown, the difference between this embodiment and Embodiment 1 is that the rotation gap 10 is a straight-through structure;

[0040] Specifically, when the rotation gap 10 is a straight-through structure, a fixing ring 7 is installed on the support ear 61. The fixing ring 7 is fixed to the support ear 61 by bolts, and the fixing ring 7 is slidably installed on the outer wall of the upper fixed cylinder 1. When the fixing ring 7 is removed from the support ear 61, the fixing ring 7 can slide up and down along the outer wall of the upper fixed cylinder 1. The fixing ring 7 is used to fix the sealing packing inside the rotation gap 10. Similarly, a rotation gap 10 with the same structure is provided between the rotating cylinder 2 and the lower fixed cylinder 3.

[0041] like Figure 6 As shown, the sealing packing is inserted into the rotation gap 10, and the fixing ring 7 is fixed to the support ear 61 with bolts. The fixing ring 7 covers the sealing packing to prevent the sealing packing from falling out of the rotation gap 10 when the rotating cylinder 2 rotates.

[0042] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A sealing structure for a blockage clearing machine, comprising at least a rotating blockage clearing machine cylinder, said blockage clearing machine cylinder being composed of a central rotating cylinder (2), an upper fixed cylinder (1) above the rotating cylinder (2), and a lower fixed cylinder (3) below the rotating cylinder (2), characterized in that, The bottom of the upper fixed cylinder (1) extends into the rotating cylinder (2), and the bottom of the rotating cylinder (2) extends into the lower fixed cylinder (3). A rotation gap (10) is reserved between the upper fixed cylinder (1) and the rotating cylinder (2), and between the rotating cylinder (2) and the lower fixed cylinder (3). The rotation gap (10) is filled with sealing filler, which is used to seal the rotation gap (10). The rotation gap (10) is either a straight or bent structure.

2. The plug clearing machine seal structure of claim 1, wherein, Support blocks (9) are provided on both sides of the inner wall of the rotation gap (10) near the bottom edge. A ring-shaped limiting protrusion (91) is fixedly provided on the surface of the support block (9). Several strip-shaped limiting blocks (8) are vertically provided on one side of the rotation gap (10) along the inner wall of the rotating cylinder (2). A support ear (61) is fixedly provided on the outer wall of the rotating cylinder (2) near the top edge.

3. The seal structure of a plug removing machine according to claim 2, wherein When the rotation gap (10) is a bent structure, a support ring (71) is fixedly provided on the outer wall of the upper fixed cylinder (1), and the support ring (71) is located above the support ear (61); The sealing filler slides along the strip-shaped limiting block (8) into the bottom of the rotating gap (10) and is inserted into the annular limiting protrusion (91).

4. The seal structure of a plug removing machine according to claim 2, wherein When the rotation gap (10) is a straight-through structure, a fixing ring (7) is installed on the support ear (61). The fixing ring (7) is fixed to the support ear (61) by bolts, and the fixing ring (7) is slidably installed on the outer wall of the upper fixing cylinder (1). The fixing ring (7) is used to fix the sealing packing in the rotation gap (10).

5. The seal structure of a plug removing machine according to claim 3 or 4, characterized in that, The bottom of the sealing packing is provided with a groove that is inserted into and cooperates with the annular limiting protrusion (91), and the side wall of the sealing packing is also provided with a sliding groove that is adapted to the strip-shaped limiting block (8), and the sealing packing is a soft packing.

6. The plug clearing machine seal structure of claim 1, wherein, A pressure sensor is embedded in the inner wall of the rotating gap (10) to monitor the air pressure change in the sealed rotating gap (10).

7. The plug clearing machine seal structure of claim 1, wherein, The width of the rotation gap (10) is 0.01-10mm.

Images