Intelligent elastic hydraulic loading device of HP type coal mill

Abstract

The utility model relates to the technical field of coal mills, and discloses an intelligent elastic hydraulic loading device of an HP type coal mill, which comprises a medium-milling coal bunker, a coal bucket is arranged on the medium-milling coal bunker, a milling roller mounting frame is arranged on the bottom side of the coal bucket, a milling roller body is arranged on the milling roller mounting frame, and the milling roller body is arranged on the milling roller mounting frame. A loading adjusting assembly is arranged on the medium mill coal bunker, and an abutting spring in the loading adjusting assembly can provide effective supporting force for an abutting connecting rod. The abutting connecting rod provides elastic abutting for the grinding roller body through the fixed connecting rod connected with the grinding roller mounting frame, so that large vibration is avoided, normal use of the top end of the grinding roller body is protected, and when the amount of the ground pebble coal is large, the loading force provided by the abutting spring for the grinding roller body is properly adjusted, so that the service life of the grinding roller body is prolonged. Enough grinding loading force is provided for the grinding roller body, and flexible use of a user is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of coal mill technology, specifically to an intelligent elastic hydraulic loading device for an HP-type coal mill. Background Technology

[0002] The HP bowl mill is a new type of medium-speed coal mill that has been improved and developed based on the RP coal mill. In recent years, the quality of raw coal for power generation has been getting worse and worse, and its grindability has also been getting worse. In addition, there are many large foreign objects (stones, iron blocks, etc.) mixed in with the raw coal. During the operation of the medium-speed coal mill, the grinding rollers grind and crush the raw coal on the grinding disc. In order to improve the grinding efficiency, a certain loading force needs to be applied to the grinding rollers. The magnitude of the loading force is determined according to the quality of the coal being ground and the amount of coal on the grinding disc.

[0003] A search revealed that this utility model discloses a loading device for a medium-speed coal mill, with authorized Chinese patent publication number CN 215277839 U, belonging to the field of coal preparation equipment. Below the spring loading mechanism is an electromagnetic loading mechanism that drives the spring loading mechanism. The electromagnetic loading mechanism includes a sleeve installed at the center of the top of the base plate and an electromagnet embedded in the center of the base plate and coaxially arranged with the sleeve. The electromagnet coincides with the vertical center line of the pull rod, and a permanent magnet with the same magnetism as the electromagnet when energized is installed at the bottom of the pull rod. When the coal mill of this utility model starts, energizing it causes the electromagnetic loading mechanism to generate magnetic force, thereby driving and loading the spring loading mechanism and lifting the pull rod under the action of the spring loading mechanism. This allows the spring loading mechanism to complete an unloaded start, and under the unloaded start of the spring loading mechanism, the pressure device on the pull rod can be lifted, facilitating the inspection and replacement of the grinding rollers on the pressure device.

[0004] The coal mill loading device in the aforementioned patent still has certain shortcomings. Since most existing medium-speed coal mill loading devices rely solely on springs to provide the loading force to the grinding rollers or hydraulic pressure to provide the loading force, when the amount of coal and stone to be ground is large, relying solely on springs to provide the loading force will result in insufficient loading force. When hydraulic pressure is used alone, when the coal and stone to be ground encounters large-diameter blocks, the hydraulic loading force has poor yielding properties, which will lead to large vibrations and cause varying degrees of damage to the grinding rollers, making it inconvenient for users to use. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an intelligent elastic hydraulic loading device for an HP-type coal mill. This solves the problem that most existing medium-speed coal mill loading devices rely solely on springs or hydraulic pressure to provide the loading force to the grinding rollers. When the amount of coal to be ground is large, relying solely on springs results in insufficient loading force. Furthermore, when using hydraulic loading alone, the hydraulic loading force has poor yielding properties when encountering large-diameter coal particles, leading to significant vibration and varying degrees of damage to the grinding rollers, making it inconvenient for users.

[0006] This utility model provides the following technical solution: an intelligent elastic hydraulic loading device for an HP type coal mill, including a medium-sized coal bin, a coal hopper on the upper part of the medium-sized coal bin, a grinding roller mounting frame on the bottom side of the coal hopper, a grinding roller body on the grinding roller mounting frame, and a loading adjustment component on the medium-sized coal bin.

[0007] The loading adjustment assembly includes a side mounting base fixed to the outside of the intermediate coal mill bunker. A limiting slot is formed in the middle of the side of the side mounting base. A fixed connecting rod is slidably inserted into the limiting slot. The end of the fixed connecting rod passes through the intermediate coal mill bunker and is vertically connected to the top of the grinding roller mounting frame. Two side wall sliding slots are symmetrically formed on both sides of the limiting slot. Abutting connecting rods are vertically connected to both sides of the end of the fixed connecting rod. The end of the abutting connecting rod extends through the side wall sliding slot to the outside of the side mounting base. An elastic limiting rod is vertically set at the end of each abutting connecting rod. Two side fixing blocks are symmetrically fixed on both sides of the side mounting base. A spring limiting groove is formed at the end of the side fixing block. The end of the elastic limiting rod extends into the spring limiting groove. A rubber block is set in the spring limiting groove. An abutting spring is sleeved on the elastic limiting rod. One end of the abutting spring is connected to the body of the elastic limiting rod.

[0008] Preferred technical solution 1: The other end of the abutment spring is fixedly connected to the rubber block, and two hydraulic cylinders are provided on both sides of the end of the side mounting seat.

[0009] Preferred technical solution 2: The driving end of the hydraulic cylinder is fixed with an adjusting push rod, the end of the adjusting push rod extends through the end of the side fixing block into the spring limiting groove and is fixedly connected to the middle of the rubber block.

[0010] Preferred technical solution 3: A vertical connecting rod is provided at the end of the grinding roller mounting frame.

[0011] This solution enables a better fixed connection between the grinding roller mounting bracket and the fixed connecting rod.

[0012] Preferred technical solution four: A baffle is provided at the end of the elastic limiting rod near the abutting connecting rod.

[0013] This solution enables the contact spring fitted on the elastic limit rod to be more effectively blocked.

[0014] Preferred technical solution five: The rubber block is slidably disposed inside the spring limiting groove.

[0015] This design enables the rubber block to absorb the rebound force generated by the resisting spring, reducing the lateral movement caused by the rebound force of the resisting spring.

[0016] Compared with the prior art, this utility model provides an intelligent elastic hydraulic loading device for an HP-type coal mill, which has the following beneficial effects:

[0017] (1) This utility model has a loading adjustment component installed on the coal mill bunker. The contact spring in the loading adjustment component can provide effective support for the contact connecting rod. The contact connecting rod provides elastic contact to the grinding roller body through the fixed connecting rod connected to the grinding roller mounting frame. When the grinding roller body encounters large-diameter stones and coal, the grinding roller body is subjected to the elastic contact of the contact spring, and thus a certain yield occurs when it contacts the stones and coal, thereby avoiding large vibrations and protecting the top of the grinding roller body for normal use. When the amount of stones and coal being ground is large, the user can push the rubber block by the hydraulic cylinder, and the rubber block compresses the contact spring, thereby appropriately adjusting the loading force provided by the contact spring to the grinding roller body, providing sufficient grinding loading force to the grinding roller body, making it more convenient for the user to use flexibly. Attached Figure Description

[0018] Figure 1 This is a partial three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a partial cross-sectional view of the structure of this utility model;

[0020] Figure 3 For the present utility model Figure 2 Internal structural diagram of the loading adjustment component;

[0021] Figure 4 For the present utility model Figure 3 Enlarged view of the structure of the elastic limit rod.

[0022] In the diagram: 1. Coal bunker of the intermediate mill; 2. Coal hopper; 3. Grinding roller body; 4. Grinding roller mounting frame; 5. Loading adjustment assembly;

[0023] 501. Side mounting bracket; 502. Limiting slot; 503. Fixed connecting rod; 504. Side wall sliding joint; 505. Abutting connecting rod; 506. Elastic limiting rod; 507. Side fixing block; 508. Spring limiting groove; 509. Rubber block; 510. Abutting spring; 511. Hydraulic cylinder; 512. Adjusting push rod. Detailed Implementation

[0024] Please see Figure 1-4 ,

[0025] Example 1: An intelligent elastic hydraulic loading device for an HP-type coal mill includes a medium-sized coal bin 1, a coal hopper 2 on the upper part of the medium-sized coal bin 1, a grinding roller mounting frame 4 on the bottom side of the coal hopper 2, a grinding roller body 3 on the grinding roller mounting frame 4, and a loading adjustment component 5 on the medium-sized coal bin 1.

[0026] The loading adjustment component 5 includes a side mounting base 501 fixed to the outside of the intermediate coal mill 1. A limiting slot 502 is opened in the middle of the side of the side mounting base 501. A fixed connecting rod 503 is slidably inserted in the limiting slot 502. The end of the fixed connecting rod 503 passes through the intermediate coal mill 1 and is vertically connected to the top of the grinding roller mounting frame 4. Two side wall sliding slots 504 are symmetrically opened on both sides of the limiting slot 502. Abutting connecting rods 505 are vertically connected to both sides of the end of the fixed connecting rod 503. The end of the abutting connecting rod 505 extends through the side wall sliding slot 504 to the outside of the side mounting base 501. An elastic limiting rod 506 is vertically set at the end of each abutting connecting rod 505. Two side fixing blocks 507 are symmetrically fixed on both sides of the side mounting base 501.

[0027] A spring limiting groove 508 is provided at the end of the side fixing block 507. The end of the elastic limiting rod 506 extends into the spring limiting groove 508. A rubber block 509 is provided in the spring limiting groove 508. An abutment spring 510 is sleeved on the elastic limiting rod 506. One end of the abutment spring 510 is connected to the rod body of the elastic limiting rod 506. The other end of the abutment spring 510 is fixedly connected to the rubber block 509. Two hydraulic cylinders 511 are provided on both sides of the end of the side mounting base 501. An adjusting push rod 512 is fixed at the drive end of the hydraulic cylinder 511. The end of the adjusting push rod 512 extends through the end of the side fixing block 507 into the spring limiting groove 508 and is fixedly connected to the middle of the rubber block 509.

[0028] Example 2: The difference between this example and Example 1 is that the end of the grinding roller mounting frame 4 is provided with a vertical connecting rod.

[0029] This allows for a better secure connection between the grinding roller mounting bracket 4 and the fixed connecting rod 503.

[0030] Example 3: The difference between this example and Example 1 is that a baffle is provided at the end of the elastic limiting rod 506 near the abutting connecting rod 505.

[0031] This causes the abutment spring 510, which is fitted onto the elastic limit rod 506, to be further blocked.

[0032] Example 4: The difference between this example and Example 1 is that the rubber block 509 is slidably disposed inside the spring limiting groove 508.

[0033] This allows the rubber block 509 to absorb the rebound force generated by the resisting spring 510, reducing the lateral movement caused by the rebound force generated by the resisting spring 510.

[0034] In this embodiment, since most existing medium-speed coal mill loading devices rely solely on springs to provide the loading force to the grinding rollers or hydraulic pressure to provide the loading force, when the amount of coal to be ground is large, relying solely on springs to provide the loading force will result in insufficient loading force. When hydraulic pressure is used alone, when the coal to be ground encounters large-diameter blocks, the hydraulic loading force has poor yielding properties, which will cause large vibrations and damage to the grinding rollers to varying degrees, making it inconvenient for users.

[0035] In summary, during the grinding process, the grinding roller body 3 sometimes encounters stones with larger diameters, causing it to vibrate or move due to contact. Since the grinding roller body 3 is mounted on the grinding roller mounting frame 4, and the top of the mounting frame 4 is vertically connected to the fixed connecting rod 503 in the loading adjustment assembly 5, the vibration caused by this contact is transmitted to the fixed connecting rod 503. The fixed connecting rod 503 has two symmetrically arranged contact connecting rods 505. An elastic limiting rod 506 is vertically provided at the end of the connecting rod 505. An anti-collision spring 510 is sleeved on the elastic limiting rod 506. The anti-collision spring 510 provides elastic anti-collision support to the anti-connecting rod 505. Thus, when the fixed connecting rod 503 is subjected to anti-collision movement, the anti-collision connecting rod 505 can compress the anti-collision spring 510 through the elastic limiting rod 506. This provides good rebound force for the grinding roller body 3 to retract during the grinding process, protects the safety of the grinding roller body 3 during the grinding process, and avoids the grinding roller body 3 from directly and rigidly contacting the stones and coal, which could easily cause damage.

[0036] Meanwhile, two hydraulic cylinders 511 are symmetrically arranged on both sides of the side mounting base 501. The hydraulic cylinders 511 abut against the rubber block 509 in the side fixing block 507 by adjusting the push rod 512. This makes it easier to adjust the elastic abutment force of the abutment spring 510 against the abutment connecting rod 505 in a timely manner. The fixed connecting rod 503 provides sufficient loading abutment force to the grinding roller mounting frame 4 and the grinding roller body 3, so that the grinding roller body 3 can be smoothly ground even when the grinding amount is large, which is convenient for users.

Claims

1. An intelligent elastic hydraulic loading device for an HP-type coal mill, comprising a medium-sized coal mill bunker (1), characterized in that: A coal hopper (2) is provided on the upper part of the medium-sized coal hopper (1), a grinding roller mounting frame (4) is provided on the bottom side of the coal hopper (2), a grinding roller body (3) is provided on the grinding roller mounting frame (4), and a loading adjustment component (5) is provided on the medium-sized coal hopper (1). The loading adjustment assembly (5) includes a side mounting base (501) fixed to the outside of the intermediate coal mill (1). A limiting slot (502) is provided in the middle of the side of the side mounting base (501). A fixed connecting rod (503) is slidably inserted in the limiting slot (502). The end of the fixed connecting rod (503) passes through the intermediate coal mill (1) and is vertically connected to the top of the grinding roller mounting frame (4). Two side wall sliding slots (504) are symmetrically provided on both sides of the limiting slot (502). Abutting connecting rods (505) are vertically connected to both sides of the end of the fixed connecting rod (503). The end of the abutting connecting rod (505) passes through the side wall sliding slot (504). 04) Extending to the outside of the side mounting base (501), the ends of the abutting connecting rod (505) are vertically provided with elastic limiting rods (506). Two side fixing blocks (507) are symmetrically fixed on both sides of the side mounting base (501). The ends of the side fixing blocks (507) are provided with spring limiting grooves (508). The ends of the elastic limiting rods (506) extend into the spring limiting grooves (508). A rubber block (509) is provided in the spring limiting grooves (508). An abutting spring (510) is sleeved on the elastic limiting rods (506). One end of the abutting spring (510) is connected to the rod body of the elastic limiting rods (506).

2. The intelligent elastic hydraulic loading device for an HP-type coal mill according to claim 1, characterized in that: The other end of the abutment spring (510) is fixedly connected to the rubber block (509), and two hydraulic cylinders (511) are provided on both sides of the end of the side mounting base (501).

3. The intelligent elastic hydraulic loading device for an HP-type coal mill according to claim 2, characterized in that: The driving end of the hydraulic cylinder (511) is fixed with an adjusting push rod (512). The end of the adjusting push rod (512) extends through the end of the side fixing block (507) into the spring limiting groove (508) and is fixedly connected to the middle of the rubber block (509).

4. The intelligent elastic hydraulic loading device for an HP-type coal mill according to claim 3, characterized in that: The end of the grinding roller mounting bracket (4) is provided with a vertical connecting rod.

5. The intelligent elastic hydraulic loading device for an HP-type coal mill according to claim 4, characterized in that: A baffle is provided at the end of the elastic limiting rod (506) near the abutting connecting rod (505).

6. The intelligent elastic hydraulic loading device for an HP-type coal mill according to claim 5, characterized in that: The rubber block (509) is slidably disposed inside the spring limiting groove (508).

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