Grinding roller installation and adjustment positioner and method for inspection and maintenance of coal gasification equipment

Abstract

The invention discloses a grinding roller installation adjustment positioner for maintenance of coal gasification device, wherein a U-shaped groove is milled on the adjustment plate along its length direction, and an adjustment screw is fixedly arranged on the adjustment plate along its length direction through a bracket, and also comprises a fixing bolt, the upper end of the fixing bolt is sleeved on the adjustment screw, and the adjustment screws at both ends of the sleeve are respectively provided with left and right adjustment nuts, and the lower end of the fixing bolt passes through the U-shaped groove of the adjustment plate; the end of the adjustment plate is connected with an installation fixing bracket through a pin shaft, and the free end of the installation fixing bracket is bent toward the free end of the fixing bolt to form a dovetail, and the end of the dovetail is provided with a plurality of positioning holes. The invention can quickly, safely and accurately locate the position of the grinding roller and the tripod.

Description

Technical Field

[0001] The invention belongs to the field of petrochemical industry, and in particular relates to a special tool for inspecting and maintaining a coal gasification device. Background Art

[0002] Coal mill is a basic device in coal chemical industry. The grinding roller, an important component of the coal mill, weighs about 12 tons. The grinding roller needs to be installed during the maintenance process, and there are certain positioning accuracy requirements for the grinding roller and the coal mill tripod.

[0003] In the prior art, when installing and positioning the grinding roller of a coal mill, three 5-ton hoists are required to cooperate precisely with a crane to adjust the positioning. It takes 10 people 12 hours to install one grinding roller. Three grinding rollers must be installed for each maintenance, which is time-consuming and inefficient. In addition, the operating space is small during installation, and there are great safety risks in the operation. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a grinding roller installation and adjustment positioner for inspection and maintenance of a coal gasification device, which can quickly, safely and accurately position the grinding roller and the tripod.

[0005] In order to solve the above technical problems, the grinding roller installation and adjustment positioner for maintenance of coal gasification equipment of the present invention comprises an adjustment plate, a U-shaped groove is milled on the adjustment plate along its length direction, an adjustment screw is fixedly arranged on the adjustment plate along its length direction through a bracket, and also comprises a fixing bolt, the upper end of the fixing bolt is sleeved on the adjusting screw, and the adjusting screw at both ends of the sleeve are respectively provided with a left and a right adjusting nut, and the lower end of the fixing bolt passes through the U-shaped groove of the adjustment plate; the end of the adjustment plate is connected to a mounting and fixing bracket through a pin shaft, the free end of the mounting and fixing bracket is bent toward the free end of the fixing bolt and is arranged to be a dovetail, and a plurality of positioning holes are arranged at the end of the dovetail.

[0006] The method for using the grinding roller installation and adjustment positioner for the inspection and maintenance of the coal gasification device comprises the following steps:

[0007] Step 1: Position the grinding roller installation adjustment positioner for coal gasification unit maintenance at one end above the grinding roller assembly, and install the fixing bracket to be fixedly connected to the fixing bracket on the coal mill through the dovetail at its free end. The fixing bolt passes through the U-shaped groove and is fixedly connected to the threaded hole on the grinding roller assembly;

[0008] Step 2: Adjust the position of the left adjusting nut and the right adjusting nut on the adjusting screw. At this time, the fixing bolt moves one position along the U-shaped groove on the adjusting plate, driving the grinding roller assembly and the installation positioning head to rotate, so that the installation positioning head coincides with the positioning surface of the tripod;

[0009] Step 3: Position the grinding roller installation adjustment locator for coal gasification unit maintenance at the other end above the grinding roller assembly, and fine-tune the position of the other installation positioning head.

[0010] After adopting the above technical solution, the mounting bracket is fixed to the fixed bracket on the coal mill, and the adjusting positioner of the present invention is installed on both sides of the grinding roller assembly, so that the position of the grinding roller is adjusted by thread adjustment instead of the original manual hoist plus crane during the installation. When the mounting head on the grinding roller assembly does not match the tripod during installation and there is a position error, the installation position can be adjusted by loosening or tightening the left and right adjusting nuts.

[0011] The beneficial effects of the present invention are that three to four persons can safely and accurately complete the installation and fixation of a grinding roller assembly within one to two hours, thus greatly improving the work efficiency, and the present invention has a simple structure and high safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The present invention is installed on both sides of the grinding roller assembly.

[0013] Figure 2 It is a grinding roller assembly diagram of the coal mill described in the background technology;

[0014] Figure 3 yes Figure 1 Left view of;

[0015] Figure 4 It is a schematic diagram of the coordination of the adjusting plate, the adjusting screw rod, the fixing bolt, and the left and right adjusting nuts in the present invention. DETAILED DESCRIPTION

[0016] like Figure 1 , Figure 2 , Figure 3 , Figure 4 It can be seen that the grinding roller installation and adjustment positioner for the inspection and maintenance of the coal gasification device of the present invention includes an adjustment plate 1, on which a U-shaped groove is milled along its length direction, and an adjusting screw 2 is fixedly arranged on the adjustment plate 1 along its length direction through a bracket, and also includes a fixing bolt 3, the upper end of the fixing bolt 3 is sleeved on the adjusting screw 2, and the adjusting screw 2 at both ends of the sleeve are respectively provided with a left and a right adjusting nut 4, 4', and the lower end of the fixing bolt 3 passes through the U-shaped groove of the adjustment plate 1; the end of the adjustment plate 1 is connected to a mounting and fixing bracket 5 through a pin shaft 51, and the free end of the mounting and fixing bracket 5 is bent toward the free end of the fixing bolt 3 to be set as a dovetail 50, and the end of the dovetail 50 is provided with a plurality of positioning holes.

[0017] like Figure 4It can be seen that, as one of the specific implementations, the left end of the adjustment plate 1 is welded with a left bracket 10, and the middle part is welded with a right bracket 11. The U-shaped groove is set on the adjustment plate 1 between the left bracket 10 and the right bracket 11. The adjustment screw 2 is fixed between the left bracket 10 and the right bracket 11 through left and right nuts. The adjustment plate 1 and the U-shaped groove are parallel to each other. A pin hole 12 is set at the end of the adjustment plate 1, which is used to connect and install the fixed bracket 5 through a pin shaft 51. The fixing bolt 3 is set as a square head bolt, and the end of the fixing bolt 3 is set with a hole, the aperture of which is larger than the diameter of the adjustment screw 2. The end of the fixing bolt 3 is in contact with the left and right adjustment nuts 4, 4'. When the left and right adjustment nuts 4, 4' apply force, the fixing bolt 3 can move horizontally along the adjustment screw 2 and the U-shaped groove.

[0018] A pin hole 12 is provided at the end of the adjustment plate 1, and a hole is also provided at the left end of the fixing bracket 5. The adjustment plate 1 and the fixing bracket 5 are connected by a pin shaft, and the pin and the hole clearance of the connection part are matched.

[0019] Figure 2 This is the grinding roller assembly diagram, Figure 1 Draw in the opposite direction. Figure 2 It mainly shows the installation positioning head 60 on the grinding roller assembly. This installation positioning head 60 should be connected with the tripod 70 on the coal mill equipment during installation, and the six bolt holes should be consistent with the installation plane.

[0020] The grinding roller 6 is a drum-shaped structural part, which works in a standing posture. At this time, its left and right side surfaces are flat, and the connecting surface between the two side surfaces is a spherical surface. A downward concave arc grinding surface 72 is provided at the bottom of the coal mill, and three grinding rollers 6 are arranged above the arc grinding surface 72 in a circumferential direction. During the coal grinding operation, the grinding roller 6 and the arc grinding surface 72 rotate relative to each other, and the spherical part of the grinding roller 6 cooperates with the arc grinding surface to crush the coal. Figure 3 The grinding roller 6 shown in FIG. 1 is arranged along the vertical direction, and this posture is also its working posture.

[0021] Figure 3 In the figure, the tripod 70 of the coal mill is simply drawn to illustrate the positional relationship between the installation positioning head 60 and the tripod 70 during installation. When installing the grinding roller assembly, first fix the installation fixing bracket 5 with the fixing bracket 71 on the coal mill to play a preliminary fixing role.

[0022] like Figure 3 It can be seen that the main difficulty in the installation process is that the plane of the installation positioning head 60 and the plane of the tripod 70 cannot coincide with each other, and there is an angle error α. The present invention mainly solves the adjustment of this slight angle error.

[0023] The installation positioning head 60 of the grinding roller assembly is connected to the tripod 70 of the coal mill by 6 bolts. The next step is to adjust the position of the installation positioning head 60 and the tripod 70 so that the installation positioning head is aligned with the 6 bolt holes on the tripod, and the installation plane of the installation positioning head is parallel to the installation plane of the tripod, and there is no installation angle error.

[0024] Specifically:

[0025] Step 1: Assemble the grinding roller installation and adjustment positioner for maintenance of coal gasification device according to the present invention in order, then install the fixing bracket 5 and fix it with the fixing bracket 71 on the coal mill through the dovetail 50 at its free end. The fixing bolt 3 passes through the U-shaped groove and is fixedly connected with the threaded hole on the grinding roller assembly.

[0026] The sleeve of the fixing bolt 3 and the adjusting screw rod 2 are clearance-fitted, and the screw rod portion of the fixing bolt 3 and the U-shaped groove are also clearance-fitted, so that the fixing bolt 3 can move along the length direction of the U-shaped groove; the fixing bolt 3 has an appropriate length, so that in the length direction of the fixing bolt 3, a gap is formed between the adjusting plate 1 and the upper surface of the grinding roller assembly, and the two can move relative to each other.

[0027] Step 2: During the installation, Figure 3 When the angle error phenomenon is shown, first loosen the right adjusting nut 4' and tighten the left adjusting nut 4. Then the fixing bolt 3 moves one position along the U-shaped groove on the adjusting plate 1. Since the fixing bolt 3 is fixedly connected to the threaded hole on the grinding roller assembly, the grinding roller assembly will be driven to move one position. During the movement of the grinding roller assembly, since the bottom of the grinding roller 6 is in contact with the arc grinding surface 72 as a curved surface, the contact part can provide a moving fulcrum, so the grinding roller assembly has a certain degree of rotation freedom.

[0028] When the left adjusting nut 4 applies force, the grinding roller assembly rotates around its bottom fulcrum. The installation positioning head 60 on the grinding roller assembly is hingedly connected to the grinding roller assembly. When the grinding roller assembly rotates, it will drive the installation positioning head 60 to rotate a position, so that the installation positioning head 60 coincides with the positioning surface of the tripod 70. Because it is adjusted by turning the thread, it can be adjusted slightly, so the installation position of the grinding roller can be adjusted quickly and accurately.

[0029] In the above steps 1 and 2, the grinding roller installation adjustment positioner for maintenance of the coal gasification device is arranged at one end of the grinding roller assembly, and is used to adjust the position of a mounting positioning head 60 .

[0030] Step 3: If Figure 1 , Figure 3It can be seen that, if necessary, the grinding roller installation adjustment positioner for maintenance of the coal gasification device is set at the other end of the grinding roller assembly, and the other installation positioning head 60 is fine-tuned, and the process is the same as steps 1 and 2.

[0031] The specific implementation methods of the present invention include but are not limited to the above-mentioned embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and modifications according to the present invention, but still fall within the protection scope of the present invention.

Claims

1. A method for using a grinding roller installation adjustment positioner for maintenance of a coal gasification device, the grinding roller installation adjustment positioner for maintenance of a coal gasification device comprising an adjustment plate (1), a U-shaped groove being milled on the adjustment plate along its length direction, an adjustment screw rod (2) being fixedly arranged on the adjustment plate (1) along its length direction through a bracket, and also comprising a fixing bolt (3), the upper end of the fixing bolt (3) being sleeved on the adjustment screw rod (2), the adjustment screw rod (2) at both ends of the sleeve head being respectively provided with a left and a right adjustment nut (4, 4'), the lower end of the fixing bolt (3) passing through the U-shaped groove of the adjustment plate (1); the end of the adjustment plate (1) being connected to a mounting fixing bracket (5) through a pin shaft (51), the free end of the mounting fixing bracket (5) being bent toward the free end of the fixing bolt (3) to form a dovetail (50), the end of the dovetail (50) being provided with a plurality of positioning holes; characterized in that: The method comprises the following steps: Step 1: Position the grinding roller installation adjustment positioner for the coal gasification device inspection and maintenance at one end above the grinding roller assembly, and install the fixing bracket (5) to be fixedly connected to the fixing bracket (71) on the coal mill through the dovetail (50) at its free end; the fixing bolt (3) passes through the U-shaped groove and is fixedly connected to the threaded hole on the grinding roller assembly; Step 2: Adjust the positions of the left adjusting nut (4) and the right adjusting nut (4') on the adjusting screw (2). Then, the fixing bolt (3) moves along the U-shaped groove on the adjusting plate (1) to drive the grinding roller assembly and the mounting positioning head (60) to rotate, so that the mounting positioning head (60) coincides with the positioning surface of the tripod (70); Step 3: Position the grinding roller installation adjustment positioner for the coal gasification unit maintenance at the other end above the grinding roller assembly, and fine-tune the position of another installation positioning head (60).

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