Spring loading quick adjusting device for medium-speed coal mill

Abstract

The utility model discloses a spring loading quick adjusting device for a medium-speed coal mill. Necessary grinding pressure is applied to a grinding roller through a spring pressurizing device, the grinding roller is abraded along with operation of a coal mill, and the gap between the grinding roller and a grinding disc needs to be adjusted frequently. As the weight of the grinding roller reaches 7.2 T, two hours are needed for adjusting a single grinding roller by a method provided by a manufacturer, and great hidden dangers are buried for safe and stable operation of equipment and life safety of personnel. The device comprises an arc-shaped channel steel pinch plate, the bottoms of the two ends of the arc-shaped channel steel pinch plate are respectively connected with a fixed supporting rod, the fixed supporting rods are arranged at the bottom of a supporting sleeve in a penetrating mode, a supporting head is fixed on the supporting sleeve, an arc-shaped groove is formed in the upper portion of the supporting head, and a jack claw is placed on the supporting head. The spring loading adjusting device is used for quickly adjusting spring loading of the medium-speed coal mill.

Description

Technical Field

[0001] The utility model relates to a spring loading quick adjustment device for a medium-speed coal mill. Background Art

[0002] The grinding force applied by the rollers of the HP series medium-speed coal mill is generated by springs. The grinding force is evenly applied to the three rollers through a static three-point system. The pressure of the grinding disc and rollers is transmitted to the foundation through the bottom plate, the tie rod and the spring. The gap between the rollers is ≥10mm, and the loading gap is ≤1.5-2.0mm. The rollers use spring pressure devices to apply the necessary grinding pressure. As the rollers wear during the operation of the coal mill, the gap between the rollers and the grinding disc needs to be adjusted frequently. Because the weight of the rollers is 7.2T, it takes 2 hours to adjust a single roller using the method provided by the manufacturer, which buries a great hidden danger to the safe and stable operation of the equipment and the life safety of personnel. Utility Model Content

[0003] The utility model aims to solve the above-mentioned problems and provides a spring loading quick adjustment device for a medium-speed coal mill.

[0004] The above purpose is achieved through the following technical solutions:

[0005] A spring-loaded quick adjustment device for a medium-speed coal mill comprises an arc-shaped channel steel buckle plate, the bottoms of both ends of the arc-shaped channel steel buckle plate are respectively connected with fixed support rods, the fixed support rods are passed through the bottom of the support sleeve, a support head is fixed on the support sleeve, an arc-shaped groove is opened on the upper part of the support head, and a jack claw is placed on the support head.

[0006] The medium-speed coal mill spring-loaded quick adjustment device, the fixed support rod comprises two L-shaped screw rods, and the two L-shaped screw rods are fixed by a fixing sleeve.

[0007] The medium-speed coal mill spring-loaded quick adjustment device has sliding holes at the bottoms of both ends of the arc-shaped channel steel buckle plate, and the L-shaped screw passes through the sliding holes and is threadedly connected with the fixing nut. Beneficial Effects

[0008] 1. The device of the utility model abandons the use of bulky large wrenches and the possible damage caused by objects hitting during the knocking process, improves the safety factor, and greatly reduces the manpower and time cost problems.

[0009] 2. The device of the utility model can be placed on the grinding disc of the coal mill, and the positions of the two jack claws can be fixed to form a diagonal form, thereby ensuring the stability of the jack claws during the pressure application process. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is the front view of the utility model;

[0011] Figure 2 It is a side view of the utility model;

[0012] Figure 3 It is a bottom view of the utility model;

[0013] Figure 4 This is the front view of the utility model when in use;

[0014] Figure 5 It is a side view of the utility model when in use;

[0015] In the figure: 1. arc groove; 2. arc channel steel gusset plate; 3. support head; 4. fixed support rod; 5. sliding hole; 6. fixed sleeve; 7. L-shaped screw; 8. support sleeve; 9. fixed nut; 10. jack claw; 11. grinding roller; 12. flange; 13. grinding disc; 14. shaft shoulder. DETAILED DESCRIPTION

[0016] Reference Figure 1-Figure 3 , a medium-speed coal mill spring loading quick adjustment device, which comprises an arc-shaped channel steel buckle plate 2, and the bottom of each end of the arc-shaped channel steel buckle plate is respectively connected to a fixed support rod 4, and the fixed support rod comprises two L-shaped screws 7, and the two L-shaped screws are fixed by a fixing sleeve 6. The bottom of each end of the arc-shaped channel steel buckle plate is provided with a sliding hole 5, and a fixing nut 9 is threadedly connected to the L-shaped screw. Then, a baffle 15 is welded to the rear end of the L-shaped screw through the sliding hole. After the baffle is set and the fixing nut is threadedly connected, the L-shaped screw can be clamped to fix its position after height adjustment. The fixed support rod is penetrated at the bottom of the support sleeve 8, and the L-shaped screw is slidably connected to the support sleeve. A supporting head 3 is fixed on the support sleeve, and the supporting head is also a channel steel structure. An arc groove 1 is provided on the upper part of the supporting head, and a jack claw 10 is placed on the supporting head. The jack claw uses a one-to-two separated hydraulic jack commonly used on the market, which is a prior art, and this device applies it here;

[0017] Working principle: Refer to Figure 4-Figure 5 , place the device on the shoulder 14 of the grinding disc 13, then place a jack claw on each support head, the push rod part of the jack claw faces the flange 12 of the grinding roller 11, the shell of the jack claw contacts the shoulder of the grinding disc, then loosen the fixing nut, adjust the height of each jack claw, and tighten the fixing nut after adjusting the height to ensure that the height of the L-shaped screw is fixed. After adjustment, the two jack claws are in diagonal positions, such as Figure 4As shown, the two jack claws are at both ends and at the same height. Then, the push rod of the jack claw is pushed out by operating the hydraulic operating device, and the front and rear mechanical bolts of the roller loading device adjustment disk are loosened by 1-3 buckles. Then, the push rod of the jack claw is pushed out by operating the hydraulic operating device to push out the spring device. When a gap appears, use a feeler gauge to measure the gap. Repeat the steps of pressing the jack, measuring the gap, and loosening the bolts until the gap is adjusted to ≤1.5-2.0mm. When the gap is adjusted to ≤1.5-2.0mm, tighten the front and rear mechanical bolts of the adjustment disk and loosen the jack claw. Compared with the previous use of a knocking wrench to adjust the gap, this design abandons the use of a bulky large wrench and the possible damage caused by objects during the knocking process, improves the safety factor, and greatly reduces the problems of manpower and time costs.

Claims

1. A spring-loaded quick adjustment device for a medium-speed coal mill, characterized by: Its composition includes an arc-shaped channel steel gusset plate, the bottoms of both ends of the arc-shaped channel steel gusset plate are respectively connected with fixed support rods, the fixed support rods are passed through the bottom of the support sleeve, a support head is fixed on the support sleeve, an arc-shaped groove is opened on the upper part of the support head, and the jack claw is placed on the support head.

2. The spring-loaded quick adjustment device for a medium-speed coal mill according to claim 1 is characterized in that: The fixed support rod comprises two L-shaped screw rods, and the two L-shaped screw rods are fixed by a fixing sleeve.

3. The spring-loaded quick adjustment device for a medium-speed coal mill according to claim 2 is characterized in that: Sliding holes are provided at the bottoms of both ends of the arc-shaped channel steel buckle plate, and the L-shaped screw rod passes through the sliding holes and is threadedly connected with the fixing nut.

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