Structure with function of protecting grinding roller temperature measuring points of MPS roller disc type medium-speed coal mill

Abstract

The utility model relates to the technical field of coal mills, in particular to a structure capable of protecting temperature measuring points of a grinding roller of an MPS roller disc type medium-speed coal mill, which comprises a protective shell and a mounting seat, the left end and the right end of the protective shell are fixedly connected with sealing assemblies, and the two sealing assemblies are distributed in a left-right mirror image mode. And a grinding roller is movably sleeved with the protective shell, a protective assembly is fixedly sleeved with the mounting base, and a temperature thermocouple rod is movably sleeved with the protective assembly. According to the structure capable of protecting the grinding roller temperature measuring points of the MPS roller disc type medium-speed coal mill, the protective outer shell is arranged, the alloy shell body of the protective outer shell has high strength and can resist external collision and abrasion, the hemispherical protrusions are distributed on the left portion and the right portion of the inner wall face of the alloy shell body in an annular array mode, and therefore the temperature measuring points of the grinding roller of the MPS roller disc type medium-speed coal mill can be protected. A buffering effect is achieved when the grinding roller rotates, direct impact of the grinding roller on the internal structure of the protective shell is reduced, and then the temperature thermocouple rod located in the protective shell is protected.

Description

Technical Field

[0001] This utility model relates to the field of coal mill technology, and in particular to a structure that protects the temperature measuring points of the grinding rollers in an MPS roller-type medium-speed coal mill. Background Technology

[0002] In the operation system of pulverized coal boilers, the MPS roller mill plays a crucial role, and the monitoring of its grinding roller temperature is essential for the stable operation and safe production of the equipment. Currently, the traditional temperature measuring point structure of the grinding mill mostly adopts the method of directly passing the thermocouple element (rod) through the inspection hole of the grinding mill frame (static) and inserting it into the lubrication oil cavity of the grinding roller (dynamic) bearing or the grinding roller shaft hole. In the operation of the MPS roller mill, the grinding roller rotates continuously at high speed and bears huge pressure. The strong vibration and impact force generated are easily transmitted to the temperature measuring point. The traditional temperature measuring point installation structure lacks effective buffering and shock absorption measures. During the long-term operation of the grinding mill, frequent impacts can easily damage the temperature measuring thermocouple rod, affecting the accuracy and continuity of temperature monitoring, and thus failing to provide reliable data support for the safe and stable operation of the grinding mill in a timely manner. Therefore, we have introduced a structure that protects the grinding roller temperature measuring point of the MPS roller mill. Utility Model Content

[0003] The main purpose of this invention is to provide a structure that protects the temperature measuring points of the grinding rollers in an MPS roller-type medium-speed coal mill, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A structure for protecting the temperature measuring point of the grinding roller in an MPS roller mill includes a protective shell and a mounting base. Sealing components are fixedly connected to the left and right ends of the protective shell, and the two sealing components are mirror-image distributed. A grinding roller is movably sleeved inside the protective shell. A protective component is fixedly sleeved inside the mounting base. A temperature-measuring thermocouple rod is movably sleeved inside the protective component. Shock-absorbing components are fixedly connected to the lower left and lower right parts of the mounting base, and the lower ends of both sealing components are fixedly connected to the outer surface of the protective shell. Fixing blocks are fixedly connected to the left and right parts of the outer surface of the mounting base, and each of the two fixing blocks has a first through-hole at its upper end.

[0006] The protective shell includes an alloy shell. A temperature measuring groove with internal and external penetration is opened in the upper part of the outer surface of the alloy shell. A first sealing ring is fixedly sleeved in the temperature measuring groove. Several hemispherical protrusions are fixedly connected to the left and right parts of the inner wall of the alloy shell. Several heat dissipation grooves with internal and external penetration are opened in the lower part of the outer surface of the alloy shell. A dustproof mesh is embedded in the inner wall of several heat dissipation grooves. The left and right ends of the alloy shell are respectively fixedly connected to the inner side of two corresponding sealing components.

[0007] Preferably, the hemispherical protrusions are arranged in a central ring array around the alloy shell, and the heat dissipation grooves are arranged in pairs at equal distances.

[0008] By adopting the above technical solution, the uniform buffering effect of the hemispherical protrusion reduces the direct friction and collision between the grinding roller and the alloy shell, reducing the wear of both. Meanwhile, the balanced heat dissipation of the heat sink avoids the degradation of material properties and aggravated wear caused by local overheating. This not only extends the service life of the protective shell, but also reduces the frequent maintenance and replacement work required due to equipment wear, lowers maintenance costs, and improves the operating efficiency and reliability of the coal mill.

[0009] Preferably, the sealing assembly includes a connecting shell, a second sealing ring is fixedly sleeved inside the connecting shell, a mounting flange is fixedly connected to the left end of the left side of the connecting shell, a third sealing ring is fixedly connected to the left end of the mounting flange, a plurality of second fixing holes are opened at the right end of the left side of the mounting flange, and the right end of the left side of the connecting shell is fixedly connected to the left end of the alloy shell.

[0010] By adopting the above technical solution: during the operation of the coal mill, the grinding roller rotates inside the protective shell. The second and third sealing rings can effectively prevent coal dust, dirt and other impurities from entering the interior from the connection between the protective shell and the grinding roller. Especially when the inside of the coal mill is a negative pressure environment, this sealing structure can prevent a large amount of coal dust carried by the outside air from rushing in, avoiding the erosion and pollution of temperature measuring points and the internal structure of the protective shell by coal dust, ensuring that all internal components of the equipment can work normally in a clean environment, and greatly improving the stability and reliability of the equipment operation.

[0011] Preferably, the protective component includes a buffer pad, the inner wall of which has several slots, each slot having a buffer strip fixedly engaged, and each buffer strip having an anti-slip texture at one end near the center of the buffer pad, and the buffer pad being fixedly fitted into the mounting base.

[0012] By adopting the above technical solution: during the operation of the coal mill, when the vibration and impact force generated by the grinding roller is transmitted to the protective component through the temperature measuring thermocouple rod, the buffer strip can absorb and disperse most of the impact force with its own elasticity and deformation ability. This effectively avoids the impact force acting directly on the temperature measuring thermocouple rod, prevents it from being damaged by impact, greatly improves the impact resistance of the temperature measuring thermocouple rod, and ensures the continuous and stable operation of temperature measurement.

[0013] Preferably, several of the card slots are arranged in a circular array around the center of the buffer pad.

[0014] By adopting the above technical solution, when the vibration and impact force generated by the grinding roller is transmitted to the temperature measuring thermocouple rod, the buffer strips distributed in a ring array buffer and protect the temperature measuring thermocouple rod from all angles.

[0015] Preferably, the grinding roller is movably sleeved inside the alloy housing and the second sealing ring, and the outer surface of the grinding roller is in contact with the hemispherical protrusion; the temperature measuring thermocouple rod is movably sleeved inside the buffer pad and the first sealing ring, and the lower end of the temperature measuring thermocouple rod is in contact with the outer surface of the grinding roller.

[0016] By adopting the above technical solution, the outer surface of the grinding roller contacts the hemispherical protrusion. The hemispherical protrusion can disperse the pressure borne by the grinding roller during rotation, reduce the direct friction between the grinding roller and the inner wall of the alloy shell, reduce the degree of wear, extend the service life of the grinding roller and the alloy shell, and ensure the stability and reliability of the coal mill operation.

[0017] Preferably, the damping assembly includes a base block, with a damper and a damping spring fixedly connected to the upper end of the base block. A top block is fixedly connected to the upper end of the damper and the upper end of the damping spring. The upper end of the top block is fixedly connected to the lower end of the mounting base, and the lower end of the base block is fixedly connected to the outer surface of the alloy shell.

[0018] By adopting the above technical solution, the damper and the shock-absorbing spring work together to buffer and protect the temperature measuring thermocouple rod, avoiding damage to the temperature measuring thermocouple rod due to vibration, and improving the protection of the temperature measuring thermocouple rod.

[0019] Preferably, the damper is located inside the shock-absorbing spring and has a gap with the inner wall of the shock-absorbing spring.

[0020] By adopting the above technical solution, the existence of the gap ensures that the damper will not collide hard with the shock-absorbing spring during operation, thus avoiding damage to the components.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In this utility model, the bottom block, damper, damping spring, and top block of the shock absorption assembly work together. The damper is located inside the damping spring and has a gap with the inner wall of the damping spring, which plays a buffering and protective role for the temperature measuring thermocouple rod, avoiding damage to the temperature measuring thermocouple rod due to vibration, and improving the protection of the temperature measuring thermocouple rod. This greatly reduces the frequency of temperature measuring thermocouple rod damage due to vibration, reduces the number of spare parts replacements, and thus reduces spare parts costs. The buffer pad in the protective assembly and the buffer strips fixed in the slots arranged in a ring array on its inner wall surface, and the buffer strips are provided with anti-slip texture near the center end, further buffer and fix the temperature measuring thermocouple rod. When the coal mill is working, it can effectively prevent the temperature measuring thermocouple rod from being damaged by shaking, and greatly improve the service life of the temperature measuring thermocouple rod.

[0023] In this invention, by setting up a protective outer shell, the alloy shell not only has high strength and can resist external collisions and wear, but also has hemispherical protrusions distributed in a ring array on the left and right sides of the inner wall of the alloy shell, which act as a buffer when the grinding roller rotates, reducing the direct impact of the grinding roller on the internal structure of the protective shell, thereby protecting the temperature measuring thermocouple rod located therein. The heat dissipation grooves distributed in pairs at equal distances on the lower part of the outer surface of the protective shell, and the inner wall is embedded with a dustproof net, which effectively prevents coal dust and other impurities from entering while dissipating heat, ensuring the temperature stability of the grinding roller's operating environment, and further improving the stability of equipment operation. Attached Figure Description

[0024] The accompanying drawings are provided to further understand this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof.

[0025] Figure 1 This is a schematic diagram of the overall structure of a structure for protecting the temperature measuring points of the grinding rollers in an MPS roller-type medium-speed coal mill according to the present invention.

[0026] Figure 2 This is a cross-sectional view of a structure for protecting the temperature measuring points of the grinding rollers in an MPS roller-type medium-speed coal mill (the protective shell and sealing components are shown in the cross-section).

[0027] Figure 3 This utility model relates to a structure for protecting the temperature measuring points of the grinding rollers in an MPS (Multi-Purpose Semiconductor) roller-type medium-speed coal mill. Figure 2 Enlarged view of the structure at point A in the image;

[0028] Figure 4 This is a cross-sectional view of a protective shell with a structure for protecting the temperature measuring points of the grinding rollers in an MPS roller-type medium-speed coal mill (the alloy shell and the first sealing ring are shown in the cross-section).

[0029] Figure 5This utility model relates to a structure for protecting the temperature measuring points of the grinding rollers in an MPS (Multi-Purpose Semiconductor) roller-type medium-speed coal mill. Figure 4 Enlarged view of the structure at point B in the image;

[0030] Figure 6 This is a schematic diagram of a sealing assembly for protecting the temperature measuring points of the grinding rollers in an MPS roller-type medium-speed coal mill, according to the present invention.

[0031] Figure 7 This is an exploded view of a protective component of the present invention, which has a structure for protecting the temperature measuring points of the grinding rollers in an MPS roller-type medium-speed coal mill.

[0032] Figure 8 This is a schematic diagram of a shock-absorbing component of the present invention, which has a structure for protecting the temperature measuring points of the grinding rollers of an MPS roller-type medium-speed coal mill.

[0033] In the diagram: 1. Protective housing; 2. Sealing assembly; 3. Grinding roller; 4. Mounting base; 5. Protective assembly; 6. Temperature measuring thermocouple rod; 7. Shock-absorbing assembly; 8. Fixing block; 9. First fixing hole; 11. Alloy housing; 12. Temperature measuring groove; 13. First sealing ring; 14. Hemispherical protrusion; 15. Heat dissipation groove; 16. Dustproof net; 21. Connecting shell; 22. Second sealing ring; 23. Mounting flange; 24. Third sealing ring; 25. Second fixing hole; 51. Buffer pad; 52. Slot; 53. Buffer strip; 54. Anti-slip texture; 71. Bottom block; 72. Damper; 73. Shock-absorbing spring; 74. Top block. Detailed Implementation

[0034] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0035] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" 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 a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] Please see Figure 1-8 This utility model provides a technical solution:

[0038] A structure for protecting the temperature measuring points of the grinding rollers in an MPS (Multi-Speed ​​Pulverizer) roller mill includes a protective shell 1 and a mounting base 4. Sealing components 2 are fixedly connected to the left and right ends of the protective shell 1, and the two sealing components 2 are mirror images of each other. A grinding roller 3 is movably sleeved inside the protective shell 1. A protective component 5 is fixedly sleeved inside the mounting base 4. A temperature-measuring thermocouple rod 6 is movably sleeved inside the protective component 5. Shock-absorbing components 7 are fixedly connected to the lower left and lower right parts of the mounting base 4, and the lower ends of the two sealing components 2 are fixedly connected to the outer surface of the protective shell 1. Fixing blocks 8 are fixedly connected to the left and right parts of the outer surface of the mounting base 4, and each of the two fixing blocks 8 has a first through-hole 9 at its upper end.

[0039] In this embodiment, the protective shell 1 includes an alloy shell 11. A temperature measuring groove 12, penetrating both the inner and outer sides, is formed on the upper part of the outer surface of the alloy shell 11. A first sealing ring 13 is fixedly fitted inside the temperature measuring groove 12. Several hemispherical protrusions 14 are fixedly connected to the left and right sides of the inner wall of the alloy shell 11. Several heat dissipation grooves 15, penetrating both the inner and outer sides, are formed on the lower part of the outer surface of the alloy shell 11. Dustproof mesh 16 is embedded in the inner wall of each of the heat dissipation grooves 15. The left and right ends of the alloy shell 11 are respectively connected to the inner sides of two corresponding sealing components 2. The surface is fixedly connected; several hemispherical protrusions 14 are arranged in a circular array around the center of the alloy shell 11, and several heat dissipation grooves 15 are distributed in pairs at equal distances; the sealing assembly 2 includes a connecting shell 21, a second sealing ring 22 is fixedly sleeved inside the connecting shell 21, a mounting flange 23 is fixedly connected to the left end of the left connecting shell 21, a third sealing ring 24 is fixedly connected to the left end of the left mounting flange 23, several second fixing holes 25 are opened at the right end of the left mounting flange 23, and the right end of the left connecting shell 21 is fixedly connected to the left end of the alloy shell 11. The protective component 5 includes a buffer pad 51, the inner wall of which has several slots 52, each slot 52 containing a buffer strip 53. Each buffer strip 53 has an anti-slip texture 54 at one end near the center of the buffer pad 51. The buffer pad 51 is fixedly fitted into the mounting base 4. The slots 52 are arranged in a circular array around the center of the buffer pad 51. The grinding roller 3 is movably fitted into the alloy housing 11 and the second sealing ring 22, with its outer surface in contact with the hemispherical protrusion 14. The temperature measuring thermocouple rod 6 is movably fitted into... The lower end of the thermocouple rod 6, which is connected within the buffer pad 51 and the first sealing ring 13, is in contact with the outer surface of the grinding roller 3; the damping assembly 7 includes a base block 71, with a damper 72 and a damping spring 73 fixedly connected to the upper end of the base block 71. The upper ends of the damper 72 and the damping spring 73 are jointly fixedly connected to a top block 74. The upper end of the top block 74 is fixedly connected to the lower end of the mounting base 4, and the lower end of the base block 71 is fixedly connected to the outer surface of the alloy shell 11; the damper 72 is located inside the damping spring 73 and has a gap with the inner wall surface of the damping spring 73.

[0040] It should be noted that this utility model is a structure for protecting the temperature measuring point of the grinding roller in an MPS roller-type medium-speed coal mill. During use, the grinding roller 3 is movably fitted inside the alloy shell 11 and the second sealing ring 22, with the outer surface of the grinding roller 3 in contact with the hemispherical protrusion 14. Then, using bolts, the protective shell 1 is installed to the corresponding position on the coal mill through the second fixing hole 25 on the mounting flange 23. The temperature measuring thermocouple rod 6 is movably fitted inside the buffer pad 51 and the first sealing ring 13, ensuring that the lower end of the temperature measuring thermocouple rod 6 is in contact with the outer surface of the grinding roller 3, thereby achieving temperature measurement of the grinding roller 3. The second sealing ring 22 and the third sealing ring 24 in the sealing assembly 2 effectively prevent… Coal dust and other impurities enter from the connection between the protective shell 1 and the grinding roller 3, protecting the internal structure from contamination and maintaining normal equipment operation. During the operation of the coal mill, the grinding roller 3 rotates inside the protective shell 1. The heat dissipation groove 15 on the protective shell 1, together with the dustproof net 16 embedded in its inner wall, can prevent coal dust and other impurities from entering while dissipating heat, ensuring stable internal temperature. When the coal mill is working, the shock-absorbing spring 73 and damper 72 in the shock-absorbing assembly 7 work together with the buffer pad 51 and buffer strip 53 in the protective assembly 5 to buffer and protect the temperature measuring thermocouple rod 6, avoiding damage to the temperature measuring thermocouple rod 6 due to vibration, and improving the protection of the temperature measuring thermocouple rod 6.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A structure for protecting the temperature measuring point of the MPS roller disc medium speed coal mill grinding roller, comprising a protective shell (1) and a mounting seat (4), characterized in that: The left end and the right end of the protective shell (1) are fixedly connected with sealing assemblies (2), and the two sealing assemblies (2) are mirror images distributed left and right, the grinding roller (3) is movably sleeved in the protective shell (1), the mounting seat (4) is fixedly sleeved with a protection assembly (5), the protection assembly (5) is movably sleeved with a temperature measuring thermocouple rod (6), the lower left part and the lower right part of the mounting seat (4) are fixedly connected with damping assemblies (7), and the lower ends of the two sealing assemblies (2) are fixedly connected with the outer surface of the protective shell (1), the outer surface left part and the outer surface right part of the mounting seat (4) are fixedly connected with fixed blocks (8), and the upper ends of the two fixed blocks (8) are provided with first fixed holes (9) penetrating upward and downward. The protective shell (1) comprises an alloy shell (11), an inner-outer penetrating temperature measuring groove (12) is formed in the upper middle part of the outer surface of the alloy shell (11), a first sealing ring (13) is fixedly sleeved in the temperature measuring groove (12), a plurality of semispherical protrusions (14) are fixedly connected to the left inner wall surface and the right inner wall surface of the alloy shell (11), a plurality of inner-outer penetrating heat dissipation grooves (15) are formed in the lower middle part of the outer surface of the alloy shell (11), and a dust screen (16) is embedded in the inner wall surface of each of the heat dissipation grooves (15). The left end and the right end of the alloy shell (11) are fixedly connected with the inner sides of the corresponding two sealing assemblies (2).

2. A structure for protecting the temperature measuring point of the grinding roller of a MPS roller disc medium speed coal mill according to claim 1, characterized in that: The plurality of semispherical protrusions (14) are arranged in a circular array around the center of the alloy shell (11), and the plurality of heat dissipation grooves (15) are arranged at equal distances two by two.

3. A structure for protecting the temperature measuring point of the grinding roller of the MPS roller disc medium speed coal mill according to claim 1, characterized in that: The sealing assembly (2) comprises a connecting shell (21), the connecting shell (21) is fixedly sleeved with a second sealing ring (22), the left end of the left connecting shell (21) is fixedly connected with a mounting flange (23), the left end of the left mounting flange (23) is fixedly connected with a third sealing ring (24), a plurality of left-right penetrating second fixed holes (25) are formed in the right end of the left mounting flange (23), and the right end of the left connecting shell (21) is fixedly connected with the left end of the alloy shell (11).

4. A structure for protecting the temperature measuring point of the grinding roller of the MPS roller disc medium speed coal mill according to claim 3, characterized in that: The protection assembly (5) comprises a buffer pad (51), a plurality of clamping grooves (52) are formed in the inner wall surface of the buffer pad (51), a buffer clamping strip (53) is fixedly clamped in each of the clamping grooves (52), an anti-skid pattern (54) is arranged at one end of each of the buffer clamping strips (53) close to the center of the buffer pad (51), and the buffer pad (51) is fixedly sleeved in the mounting seat (4).

5. A structure for protecting the temperature measuring point of the grinding roller of the MPS roller disc medium speed coal mill according to claim 4, characterized in that: The plurality of clamping grooves (52) are arranged in a circular array around the center of the buffer pad (51).

6. A structure for protecting the temperature measuring point of the grinding roller of a MPS roller disc medium speed coal mill according to claim 1, characterized in that: The grinding roller (3) is movably sleeved in the alloy shell (11) and the second sealing ring (22), and the outer surface of the grinding roller (3) is in contact with the semispherical protrusion (14); and the temperature measuring thermocouple rod (6) is movably sleeved in the buffer pad (51) and the first sealing ring (13), and the lower end of the temperature measuring thermocouple rod (6) is in contact with the outer surface of the grinding roller (3).

7. A structure for protecting the temperature measuring point of the grinding roller of a MPS roller disc medium speed coal mill according to claim 1, characterized in that: The shock-absorbing assembly (7) comprises a bottom block (71), a damper (72) and a shock-absorbing spring (73) are fixedly connected to the upper end of the bottom block (71), the upper end of the damper (72) and the upper end of the shock-absorbing spring (73) are fixedly connected to a top block (74), the upper end of the top block (74) is fixedly connected to the lower end of the mounting seat (4), and the lower end of the bottom block (71) is fixedly connected to the outer surface of the alloy shell (11).

8. A structure for protecting the temperature measuring point of the grinding roller of the MPS roller disc medium speed coal mill according to claim 7, characterized in that: The damper (72) is located in the shock-absorbing spring (73) and has a gap with the inner wall surface of the shock-absorbing spring (73).

Images