Coal mill pull rod clamping sleeve

Abstract

The utility model provides a pull rod clamping sleeve of a coal mill. The pull rod clamping sleeve comprises a first semicircular cylinder clamping sleeve and a second semicircular cylinder clamping sleeve which are symmetrically arranged, one side of the first semicircular cylinder clamping sleeve and one side of the second semicircular cylinder clamping sleeve are rotatably connected, clamping rings are arranged on the other sides of the first semicircular cylinder clamping sleeve and the second semicircular cylinder clamping sleeve in a staggered mode, and pin shafts are arranged to penetrate through all the clamping rings to achieve locking. The utility model has the beneficial effects that the installation convenience and the maintenance simplicity are realized, and a worker does not need to fasten a plurality of bolts in the installation process by adopting an openable and closable structure and a pin shaft locking mechanism. By means of the design, the installation process is simplified, internal inspection becomes easier, and the labor intensity of workers is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mills, in particular to a pull rod socket of a coal mill. Background Art

[0002] A coal mill is an industrial device mainly used to grind coal into fine powder to improve the combustion efficiency of coal and reduce pollutant emissions. Coal mills are widely used in industries such as electric power, chemical industry, metallurgy, and building materials.

[0003] The pull rod of a coal mill is an important component in the coal mill. Its main function is to apply a grinding force to the grinding roller through a hydraulic loading system to achieve the grinding of raw coal. The pull rod usually consists of an upper pull rod, a lower pull rod, a spherical self-aligning bearing, a pull rod connecting sleeve, a spherical plain bearing, a pin shaft, etc. The upper pull rod is connected to the tripod through a spherical self-aligning bearing and is connected to the piston rod of the hydraulic cylinder through a pull rod connecting sleeve. When the oil cylinder works, it drives the pull rod to move up and down reciprocally to load the grinding roller and the grinding table.

[0004] The pull rod socket we usually use is made by cutting a DN100 steel pipe into a DN100 semi-circular pipe. At the position of the center line of the sleeve height, two perforated iron plates are welded respectively, so that bolts pass through the two iron plates and are fastened firmly, and the two equal-height semi-circular pipes wrap the pull rod of the coal mill. However, such an installation process is very time-consuming and laborious, and is prone to causing injuries to personnel. Summary of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the problem of time-consuming and laborious installation of the pull rod socket and being prone to causing injuries to personnel is solved.

[0006] The utility model provides a pull rod socket of a coal mill, which includes a first semi-cylindrical socket and a second semi-cylindrical socket arranged symmetrically; one side of the first semi-cylindrical socket and the second semi-cylindrical socket is rotatably connected, and clamping rings are respectively arranged alternately on the other side, and a pin shaft is arranged to pass through all the clamping rings to achieve locking.

[0007] Further, on the side of the first semi-cylindrical socket where the rotation connection is located, two coaxial bearings are fixedly arranged on the side surface, and a rotating shaft is arranged inside the bearings.

[0008] Further, on the side of the second semi-cylindrical socket where the rotation connection is located, a connecting plate is fixedly arranged on the side surface, and the connecting plate is fixedly connected to the rotating shaft.

[0009] As a preferred scheme, the radii of the first semi-cylindrical socket and the second semi-cylindrical socket are 3 to 10 millimeters larger than the radius of the pull rod of the coal mill.

[0010] As a preferred scheme, the number of the clamping rings on one side is 1 to 3.

[0011] As a preferred solution, a thread is provided on the inner side of the snap ring, and the pin shaft is a screw rod used in cooperation with the thread.

[0012] As a preferred solution, the connecting plate, the first semi-cylindrical bushing, and the second semi-cylindrical bushing are coaxially arranged.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. The present utility model realizes the convenience of installation and the simplicity of maintenance. By adopting an openable and closable structure and a pin shaft locking mechanism, during the installation process, workers no longer need to tighten multiple bolts. This design not only simplifies the installation process but also makes internal inspection easier, greatly reducing the labor intensity of personnel.

[0015] 2. The present utility model does not require a large amount of processing operations. It also improves the safety of operations to a certain extent and reduces safety risks caused by improper installation or processing errors. This improvement not only enhances the reliability of use of the kit but also reduces the maintenance cost and working intensity during long-term operation, ensuring the safe and stable operation of the coal mill. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the content of the present utility model more clearly understood, the following further details the present utility model according to specific embodiments in conjunction with the drawings, where

[0017] Figure 1 is a schematic structural diagram of the present utility model.

[0018] Figure 2 is a schematic structural diagram of another angle of the present utility model.

[0019] The reference numerals in the drawings are:

[0020] 1. First semi-cylindrical bushing; 2. Second semi-cylindrical bushing; 3. Snap ring; 4. Pin shaft; 5. Bearing; 6. Rotating shaft; 7. Connecting plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] To illustrate the characteristics of the present utility model, the following further describes the present utility model in conjunction with the drawings and embodiments.

[0022] Embodiment:

[0023] Please refer to Figures 1 to 2 , this embodiment provides a coal mill pull rod bushing, including symmetrically arranged first semi-cylindrical bushing 1 and second semi-cylindrical bushing 2;

[0024] One side of the first semi-cylindrical ferrule 1 and the second semi-cylindrical ferrule 2 is rotatably connected. Specifically, two coaxial bearings 5 are fixedly arranged on the side of the rotatably connected side of the first semi-cylindrical ferrule 1, and a rotating shaft 6 is arranged inside the bearing 5; and a connecting plate 7 is fixedly arranged on the side of the rotatably connected side of the second semi-cylindrical ferrule 2, and the connecting plate 7 is fixedly connected to the rotating shaft 6, so that the first semi-cylindrical ferrule 1 and the second semi-cylindrical ferrule 2 can be opened and closed, which is convenient for operators to install and remove. In order to ensure the integrity of the structure, in this embodiment, the connecting plate 7, the first semi-cylindrical ferrule 1 and the second semi-cylindrical ferrule 2 are arranged coaxially.

[0025] In addition, snap rings 3 are alternately arranged on the other sides of the first semi-cylindrical ferrule 1 and the second semi-cylindrical ferrule 2. In this embodiment, there is one snap ring 3 on the first semi-cylindrical ferrule 1 and two snap rings 3 on the second semi-cylindrical ferrule 2. Correspondingly, a pin shaft 4 is also arranged to pass through all the snap rings 3 to achieve locking. In this embodiment, threads are arranged on the inner side of the snap ring 3, and the pin shaft 4 is a screw rod used in cooperation with the threads and is fixed by a bolt, which avoids the pin shaft 4 slipping out of the snap ring 3.

[0026] Considering the thermal expansion and contraction effect, in this embodiment, the radii of the first semi-cylindrical ferrule 1 and the second semi-cylindrical ferrule 2 are 3 millimeters larger than the radius of the coal mill pull rod to cope with the thermal expansion of the coal mill pull rod.

[0027] The above embodiments and the accompanying drawings are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. The present invention has been described in detail with reference to the preferred embodiments. Those of ordinary skill in the art should understand that any changes, modifications, additions or substitutions made by those of ordinary skill in the art within the scope of the essence of the present invention do not depart from the purpose of the present invention and should also fall within the scope of the claims of the present invention. Other related technical structures not exhaustively disclosed in the present invention are the prior art in the art.

Claims

1. A coal mill tie rod ferrule, comprising a first semi-cylindrical ferrule (1) and a second semi-cylindrical ferrule (2) which are symmetrically arranged; Features: One side of the first semi-cylindrical ferrule (1) and the second semi-cylindrical ferrule (2) are rotatably connected, and the other side is provided with clamping rings (3) in an alternating manner, and a pin shaft (4) is provided to pass through all the clamping rings (3) to achieve locking.

2. The coal mill tie rod sleeve according to claim 1, characterized in that: Two upper and lower coaxial bearings (5) are fixedly disposed on the side surface of one side of the first semi-cylindrical ferrule (1) to which the rotatable connection is connected, and a rotating shaft (6) is disposed inside the bearing (5).

3. The coal mill tie rod sleeve according to claim 2, characterized in that: A connecting plate (7) is fixedly provided on the side of one side of the second semi-cylindrical ferrule (2) for rotational connection, and the connecting plate (7) is fixedly connected to the rotating shaft (6).

4. The coal mill tie rod sleeve according to claim 1, characterized in that: The radius of the first semi-cylindrical ferrule (1) and the second semi-cylindrical ferrule (2) is 3 to 10 mm greater than the radius of the coal mill pull rod.

5. The coal mill tie rod sleeve according to claim 1, characterized in that: The number of the clamping rings (3) on one side is 1 to 3.

6. The coal mill tie rod sleeve according to claim 1, characterized in that: The inner side of the clamping ring (3) is provided with a thread, and the pin shaft (4) is a screw rod used in conjunction with the thread.

7. The coal mill tie rod sleeve according to claim 3, characterized in that: The connecting plate (7), the first semi-cylindrical ferrule (1) and the second semi-cylindrical ferrule (2) are coaxially arranged.

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