Improved cement grinding mill lining plate bolt sealing ring

Abstract

The utility model discloses an improved cement mill lining plate bolt sealing ring, and relates to the technical field of sealing, the improved cement mill lining plate bolt sealing ring comprises a sealing ring body, a blocking ring is arranged at the top of the inner side wall of the sealing ring body, the thickness of the blocking ring is gradually reduced from bottom to top, the diameter of the blocking ring is gradually reduced from bottom to top, and the inner diameter of the top of the blocking ring is smaller than the outer diameter of a bolt. When the bolt is sleeved with the sealing ring, the blocking ring is in interference fit with the bolt, and the top of the blocking ring is inserted into a gap between the lining plate and the bolt. When the sealing ring is used for sealing, the sealing ring body is arranged on the bolt in a sleeving mode, the blocking ring on the sealing ring body is in interference fit with the bolt, and after the nut is used for fixing the sealing ring body, the sealing ring body drives the top of the blocking ring to move and block the gap between the lining plate and the bolt; therefore, further sealing is formed at the joint of the lining plate and the bolt, and ash leakage is not prone to occurring at the joint of the lining plate and the bolt.

Description

Technical Field

[0001] This application relates to the field of sealing technology, and in particular to an improved bolt sealing ring for cement mill liners. Background Technology

[0002] A cement ball mill is a large rotating cylindrical device that crushes materials to the required fineness through the impact and friction of internal grinding media (such as steel balls). It is the core equipment for raw material preparation and cement grinding in cement plants.

[0003] The liner of a cement ball mill is bolted to the mill equipment. A sealing ring and a pressure plate are fitted onto the bolt. A nut is rotated onto the bolt, compressing the pressure plate, which in turn compresses the sealing ring, thus sealing the gap between the liner and the bolt. However, to allow the bolt to pass through the liner, the hole in the liner is larger than the outer diameter of the bolt. During long-term operation of the cement ball mill, the generated powder will flow out from the gap between the liner and the bolt, causing the sealing ring to fail to seal effectively. This affects the performance of the cement ball mill and may shorten its lifespan. Utility Model Content

[0004] In order to achieve effective sealing of the gap between the cement ball mill liner and the bolts, this application provides an improved cement mill liner bolt sealing ring.

[0005] The improved bolt sealing ring for cement grinding mill lining plates provided in this application adopts the following technical solution:

[0006] An improved sealing ring for a cement mill liner bolt includes a sealing ring body, with a plug ring disposed on the top of the inner sidewall of the sealing ring body. The thickness of the plug ring gradually decreases from bottom to top, and the diameter of the plug ring gradually decreases from bottom to top. The inner diameter of the top of the plug ring is smaller than the outer diameter of the bolt. When the sealing ring is fitted onto the bolt, the plug ring and the bolt are interference-fitted, and the top of the plug ring is inserted into the gap between the liner and the bolt.

[0007] By adopting the above technical solution, when using a sealing ring for sealing, the sealing ring body is fitted onto the bolt, and the plug on the sealing ring body is interference-fitted with the bolt. After the sealing ring body is fixed with a nut, the sealing ring body drives the top of the plug to move and seal the gap between the liner and the bolt, thereby forming a further seal at the connection between the liner and the bolt, making it less likely for dust to leak at the connection between the liner and the bolt.

[0008] Preferably, a deformation cavity is formed within the sealing ring body, and the deformation cavity is located on the side close to the sealing ring.

[0009] By adopting the above technical solution, when the sealing ring body is installed on the bolt, the sealing ring body is pressed above the deformation cavity. Due to the existence of the deformation cavity, the sealing ring body can drive the plug ring to undergo slight deformation towards the outside of the sealing ring body, thereby making it easier to put the plug ring on the bolt.

[0010] Preferably, a metal skeleton ring is fitted onto the outer wall of the sealing ring body.

[0011] By adopting the above technical solution, the metal skeleton ring reinforces the sealing ring body, resulting in a better sealing effect.

[0012] Preferably, the top of the metal skeleton ring is provided with a plurality of metal skeleton plates at equal intervals along its circumference, the metal skeleton plates are arranged radially along the sealing ring body, and the ends of the metal skeleton plates away from the metal skeleton ring are located above the center of the deformation cavity.

[0013] By adopting the above technical solution, the metal skeleton plate reinforces the sealing ring body, improving the stability of the sealing ring body. At the same time, when the sealing ring body is pressed, the sealing ring body can drive the metal skeleton plate to tilt, and the end of the metal skeleton plate squeezes the deformation cavity, thereby further facilitating the deformation of the sealing ring towards the outside of the sealing ring body.

[0014] Preferably, a limiting groove is formed on the outer side wall of the sealing ring body, and the metal skeleton ring is located in the limiting groove.

[0015] By adopting the above technical solution, the limiting groove limits the metal skeleton ring, thereby improving the stability of the metal skeleton ring.

[0016] Preferably, the top of the plug ring is provided with a sharp corner.

[0017] By adopting the above technical solution, the top of the plug ring is set with a sharp angle, which makes it easy for the top of the plug ring to be inserted into the gap between the liner and the bolt connection.

[0018] Preferably, the cross-section of the deformation cavity is circular, elliptical, or semi-circular.

[0019] By adopting the above technical solution, the cross-section of the deformation cavity is circular, elliptical or semi-circular, which makes it easier for the sealing ring body to drive the plug ring to deform.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] 1. Using a sealing ring, when using a sealing ring for sealing, the sealing ring body is fitted onto the bolt. The plug on the sealing ring body is interference-fitted with the bolt. After the sealing ring body is fixed with a nut, the sealing ring body drives the top of the plug to move and seal the gap between the liner and the bolt, thereby forming a further seal at the connection between the liner and the bolt, making it less likely for dust to leak at the connection between the liner and the bolt.

[0022] 2. When installing the sealing ring body onto the bolt with the help of the bolt, press the sealing ring body above the deformation cavity. Due to the existence of the deformation cavity, the sealing ring body can drive the plug ring to deform slightly outward, which makes it easier to put the plug ring onto the bolt.

[0023] 3. The sealing ring body is reinforced by a metal skeleton ring, which makes the sealing effect of the sealing ring body better. Attached Figure Description

[0024] Figure 1 This is a schematic diagram showing the usage status of the sealing ring in this application;

[0025] Figure 2 This is a front cross-sectional view of a portion of the sealing ring structure of this application;

[0026] Figure 3 This is a top sectional view of the overall structure of the sealing ring in this application.

[0027] Reference numerals in the attached drawings: 1. Sealing ring body; 2. Plug ring; 3. Bolt; 4. Deformation cavity; 5. Metal skeleton ring; 6. Metal skeleton plate; 7. Limiting groove. Detailed Implementation

[0028] The following is in conjunction with the appendix Figures 1-3 This application will be described in further detail.

[0029] This application discloses an improved bolt sealing ring for cement grinding mill liners.

[0030] Reference Figure 1 and Figure 2 An improved cement grinding plate bolt sealing ring includes a sealing ring body 1, and a plug ring 2 integrally formed on the top of the inner side wall of the sealing ring body 1. The thickness and diameter of the plug ring 2 are both designed to gradually decrease from bottom to top, and the inner diameter of the top of the plug ring 2 is smaller than the outer diameter of the bolt 3.

[0031] When sealing is implemented, the sealing ring body 1 is fitted onto the bolt 3. Taking advantage of the interference fit between the plug ring 2 and the bolt 3, when the sealing ring body 1 is tightened with the nut 8, the top of the plug ring 2, which is deformed by compression, will be precisely embedded in the gap between the liner and the bolt 3, thereby forming a seal at the joint of the liner and the bolt 3, effectively preventing dust leakage.

[0032] The top of the plug ring 2 is designed with a pointed tip. When the sealing ring 1 is assembled under pressure, the contact resistance when the plug ring 2 is inserted into the gap between the liner and the bolt 3 is reduced, the contact pressure stability is enhanced, and the top of the plug ring 2 is easier to insert into the gap at the connection between the liner and the bolt 3.

[0033] A metal skeleton ring 5 is installed on the outer wall of the sealing ring body 1. A limiting groove 7 is opened on the outer wall of the sealing ring body 1, and the metal skeleton ring 5 is located in the limiting groove 7.

[0034] When the sealing ring body 1 is subjected to the tightening pressure of the bolt 3, the metal skeleton ring 5 acts as a stress support frame, which makes the sealing effect of the sealing ring body 1 better and makes it easier for the sealing ring 1 to maintain a stable contact sealing state under dynamic working conditions.

[0035] At the same time, the limiting groove 7 limits the metal skeleton ring 5, effectively suppressing its tendency to undergo micro-displacement under the action of external forces such as vibration, so as to maximize the reinforcing effect of the metal skeleton ring 5 and maintain sealing stability under harsh working conditions.

[0036] Reference Figure 2 and Figure 3 The sealing ring body 1 has a deformation cavity 4 inside, which is located on the side close to the sealing ring 2. The cross-section of the deformation cavity 4 is designed to be circular, elliptical, or semi-circular. Multiple circumferentially equidistant metal skeleton plates 6 are installed on the top of the metal skeleton ring 5. Each metal skeleton plate 6 extends radially along the sealing ring body 1, and the end of the metal skeleton plate 6 away from the metal skeleton ring 5 is positioned above the center of the deformation cavity 4.

[0037] During installation, when the operator applies pressure to the area above the deformation cavity 4, the cavity structure provides elastic deformation space for the sealing ring body 1, causing the plug ring 2 to undergo controllable radial expansion deformation to the outside of the sealing ring 1. This reduces the assembly resistance caused by the interference fit between the plug ring 2 and the bolt 3, improves assembly efficiency, and ensures uniform pressure distribution on the contact surface between the plug ring 2 and the bolt 3, thereby enhancing the dynamic reliability of the sealing system.

[0038] The metal skeleton plate 6 reinforces the sealing ring body 1, improving its stability. When pressure is applied to the sealing ring body 1, it causes the metal skeleton plate 6 to tilt, and the end of the metal skeleton plate 6 squeezes the deformation cavity 4, further facilitating the deformation of the plug ring 2 towards the outside of the sealing ring body 1.

[0039] The implementation principle of an improved cement mill liner bolt sealing ring according to an embodiment of this application is as follows: A plug ring 2 is installed on the top of the inner wall of the sealing ring body 1. The thickness and diameter of the plug ring 2 are both designed to gradually decrease from bottom to top, and the inner diameter of the top of the plug ring 2 is smaller than the outer diameter of the bolt 3. When sealing, by fitting the sealing ring body 1 onto the bolt 3, and utilizing the interference fit between the plug ring 2 and the bolt 3, when the sealing ring body 1 is tightened with the nut 8, the top of the plug ring 2, which is deformed by compression, will precisely embed into the gap between the liner and the bolt 3. Thus, under the dual action of tightening and elastic deformation, a three-dimensional sealing barrier is formed at the joint between the liner and the bolt 3, effectively preventing ash leakage.

[0040] The above are merely optional embodiments of this disclosure and are not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. An improved cement mill liner bolt seal ring, characterized by: The sealing ring body (1) is provided with a packing ring (2) on the inner side wall top, the thickness of the packing ring (2) gradually decreases from bottom to top, the diameter of the packing ring (2) gradually decreases from bottom to top, the inner diameter of the top of the packing ring (2) is smaller than the outer diameter of the bolt (3), when the sealing ring body (1) is sleeved on the bolt (3), the packing ring (2) is in interference fit with the bolt (3), and the top of the packing ring (2) is inserted into the gap between the backing plate and the bolt (3).

2. An improved cement mill liner bolt seal ring as claimed in claim 1, wherein: A deformation cavity (4) is formed in the sealing ring body (1), and the deformation cavity (4) is located on one side close to the packing ring (2).

3. An improved cement mill liner bolt seal ring as claimed in claim 2, wherein: A metal skeleton ring (5) is sleeved on the outer side wall of the sealing ring body (1).

4. An improved cement mill liner bolt seal ring as claimed in claim 3 wherein: A plurality of metal skeleton plates (6) are arranged on the top of the metal skeleton ring (5) along the circumferential direction of the metal skeleton ring (5), the metal skeleton plates (6) are arranged along the radial direction of the sealing ring body (1), and the end of the metal skeleton plate (6) away from the metal skeleton ring (5) is located above the middle of the deformation cavity (4).

5. An improved cement mill liner bolt seal ring as claimed in claim 3 wherein: A limiting groove (7) is formed on the outer side wall of the sealing ring body (1), and the metal skeleton ring (5) is located in the limiting groove (7).

6. An improved cement mill liner bolt seal ring as claimed in claim 1 wherein: The top end of the packing ring (2) is provided with a sharp corner.

7. An improved cement mill liner bolt seal ring as claimed in claim 2 wherein: The cross section of the deformation cavity (4) is circular, elliptical or semicircular.

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