Ruler suitable for adjusting and restoring angles of fan blades of main ventilator

Abstract

The utility model belongs to the technical field of coal mine main ventilator detection, and aims to solve the problems that in the prior art, a fan blade of a main ventilator is huge in size, the rotation debugging angle of the fan blade is not easy to fix accurately, deviation is prone to occurring, the underground air supply volume is changed, and accidents of a mine ventilation system are caused. The fan blade angle adjusting and restoring ruler suitable for the main ventilator comprises a ruler body and a marking pen. The ruler body comprises a first ruler part and a second ruler part which are connected in an included angle shape, the outer wall of the first ruler part is used for being attached to the fan blade wall, the outer wall of the second ruler part is provided with a groove body used for containing a scribing pen, and the scribing pen is used for scribing along the included angle edge of the ruler body. The device solves the problem that no reference is provided for reduction after angle test and fine adjustment of the existing main fan blade of a coal mine, and angle adjustment and recovery of the main fan blade are completed by using the principle of lineation positioning.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal mine main ventilation fan detection, and particularly relates to a restoration ruler suitable for adjusting the angle of fan blades of a main ventilation fan. Background Art

[0002] In the mine production process, the axial flow main ventilation fan is the main large-scale equipment of the mine. There are two units equipped, one for use and one for backup. The main ventilation fan uses the motor reversal method to reverse the wind, and the blade adjustment angle is adjustable from -15° to +15°, which is adjusted by using a mechanical stop of the moving blades. In the mining process, the air volume needs to be adjusted according to the continuous changes in the ventilation system and the actual needs of mine production. In order to ensure that the fan blade adjustment always remains flexible and reliable, the mine usually regularly tests the fan blade angle adjustment mechanism to ensure that the fan blade angle can rotate flexibly and reliably when adjustment or performance testing is required, to avoid the situation where the mechanism is stuck and the fan blade angle cannot be rotated. At the same time, each fan blade angle adjustment must be completed within the specified time and accurately restored to the original angle to ensure that the air volume does not change, so as to ensure safe production in the mine.

[0003] During regular fine-tuning, test runs, and restoration of axial flow fans in mines, it's crucial to ensure the blades are restored to their original operating angles after the test runs are complete, and to complete the test runs within the specified timeframe. Imprecise blade rotation angles can lead to variations in underground air volume, potentially causing mine ventilation system failures. Utility Model Content

[0004] In order to solve at least one of the above technical problems existing in the prior art, the present utility model provides a restoration ruler suitable for adjusting the angle of the fan blades of a main fan.

[0005] The utility model adopts the following technical solution: a ruler suitable for adjusting the angle of the fan blades of a main fan, comprising a ruler body and a marking pen; the ruler body comprises a first ruler portion and a second ruler portion connected at an angle, wherein the outer wall of the first ruler portion is used to fit the fan blade wall, and the outer wall of the second ruler portion is provided with a groove for placing the marking pen, and the marking pen is used to mark along the angle edge of the ruler body.

[0006] Preferably, the first ruler portion and the second ruler portion are fixed by welding at an angle, and the angle is an acute angle; the angle between the first ruler portion and the second ruler portion is fixed with auxiliary assistance by an angle positioning strip.

[0007] Preferably, the angle positioning strip is a straight-line positioning strip fixed between the first ruler portion and the second ruler portion by rivets.

[0008] Preferably, the first ruler portion includes a first horizontal segment and a first vertical segment connected vertically, and the second ruler portion includes a second horizontal segment and a second vertical segment connected vertically; the first horizontal segment and the second horizontal segment are both strip structures, and the angle positioning bar is connected between the two horizontal segments; the first vertical segment and the second vertical segment are both right-angled triangle structures, the right-angled short sides of the two vertical segments are connected and fixed, and the right-angled long sides of the two vertical segments are respectively connected and fixed with the corresponding horizontal segments.

[0009] Preferably, the trough body is fixed to the outer wall of the second vertical section of the second ruler, and the trough body is a U-shaped bent plate fixedly connected to the second vertical section; the first vertical section and the second vertical section are both hollow plate structures.

[0010] Preferably, the marking pen is a long strip structure, and the marking pen can be snugly inserted into the groove.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] This device uses a fan blade angle restoration ruler. During the monthly regular fan angle test, the fan blade angle can be adjusted quickly and accurately to ensure that the main fan blade mechanism test can be completed accurately and efficiently. The ruler is light and convenient, easy to operate and carry, and is suitable for use in a small space where the fan is installed. It can not only reduce the difficulty of maintenance work and improve work efficiency, but also avoid the impact of air volume caused by the inability to accurately restore the main fan blade angle. It has promotion value in the process of adjusting and restoring the fan blade angle of the main ventilation fan in mines. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 2 is a schematic structural diagram of this embodiment (first perspective);

[0015] Figure 2 2 is a schematic structural diagram of this embodiment (second viewing angle);

[0016] Figure 3 1 is a line drawing schematic diagram (top view) of this embodiment.

[0017] In the figure: 101 - first ruler; 102 - second ruler; 2 - marking pen; 3 - angle positioning bar; 4 - trough; 5 - fan blade base; 6 - blade; 7 - marking. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention are clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention.

[0019] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size, without affecting the efficacy and purpose that can be achieved by the present invention, should fall within the scope of the technical content disclosed by the present invention. It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0020] The utility model provides an embodiment:

[0021] like Figure 1 、 Figure 2 As shown, a ruler suitable for adjusting the angle of the fan blades of a main fan includes a ruler body and a marking pen 2; the ruler body includes a first ruler portion 101 and a second ruler portion 102 connected at an angle, wherein the outer wall of the first ruler portion 101 is used to fit the fan blade wall, and the outer wall of the second ruler portion 102 is provided with a groove body 4 for accommodating the marking pen 2, and the marking pen 2 is used to mark along the angle edge of the ruler body.

[0022] The first and second scale parts 101, 102 are welded together at an acute angle. The angle between the first and second scale parts 101, 102 is secured by an angle positioning bar 3. The angle positioning bar 3 is a straight-line positioning bar fixed between the first and second scale parts 101, 102 via rivets.

[0023] The first ruler portion 101 includes a first horizontal segment and a first vertical segment connected vertically, and the second ruler portion 102 includes a second horizontal segment and a second vertical segment connected vertically; the first horizontal segment and the second horizontal segment are both strip structures, and the angle positioning bar 3 is connected between the two horizontal segments; the first vertical segment and the second vertical segment are both right-angled triangle structures, the right-angled short sides of the two vertical segments are connected and fixed, and the right-angled long sides of the two vertical segments are respectively connected and fixed with the corresponding horizontal segments.

[0024] The trough body 4 is fixed to the outer wall of the second vertical section of the second scale portion 102. The trough body 4 is a U-shaped bent plate fixedly connected to the second vertical section. The first vertical section and the second vertical section are both hollow plate structures.

[0025] In this embodiment, the ruler body uses two L-shaped angle aluminums with lengths of 200 mm and 215 mm respectively, one end of which is welded to form a 50° angle. A 70 mm high L-shaped angle aluminum is welded upright at the connection point, and then the top of the upright angle aluminum is welded to the other ends of the two L-shaped angle aluminums forming the angle to form a triangular frame.

[0026] The angle positioning bar 3 is made of aluminum bar, 40mm away from the angle of the triangular frame, and positioning rivets are used to reinforce the angle and stability of the two angle aluminums. An aluminum bar is welded on one side of the triangular frame, leaving a 2mm gap in the middle to form a groove 4. The marking pen 2 is inserted into the middle of the groove 4 to ensure that it can be moved. The marking pen 2 is a slate pencil.

[0027] Specific steps:

[0028] like Figure 3 As shown, when conducting a trial adjustment of the fan angle, place the ruler at the root of the main fan blade, and use a marking pen 2 to draw three lines as marks along the inner edges of the first and second horizontal segments and the outer edge of the angle positioning strip 3 at the rotating part of the fan blade. Then, debug and rotate the fan blade. As the angle rotates, the positions of the three lines move and change. When it is necessary to restore the fan blade angle, use the "three-side positioning method" to adjust the fan blade to the position where the three lines completely overlap to ensure accurate restoration.

[0029] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A restoration ruler for adjusting the blade angle of a main fan, characterized by: Including ruler and marking pen (2); The ruler body comprises a first ruler portion (101) and a second ruler portion (102) connected at an angle, wherein the outer wall of the first ruler portion (101) is used to fit against the wall of the fan blade, and the outer wall of the second ruler portion (102) is provided with a groove body (4) for accommodating a marking pen (2), and the marking pen (2) is used to mark along the angle edge of the ruler body.

2. The blade angle adjustment and restoration ruler for a main fan according to claim 1, characterized in that: The angle between the first ruler portion (101) and the second ruler portion (102) is welded and fixed, and the angle is an acute angle; the angle between the first ruler portion (101) and the second ruler portion (102) is assisted in fixing by an angle positioning strip (3).

3. The restoration ruler for adjusting the angle of the fan blades of the main fan according to claim 2, characterized in that: The angle positioning strip (3) is a straight-line positioning strip fixed between the first ruler portion (101) and the second ruler portion (102) by rivets.

4. The blade angle adjustment and restoration ruler for a main fan according to claim 1 is characterized in that: The first ruler portion (101) includes a first horizontal section and a first vertical section connected vertically, and the second ruler portion (102) includes a second horizontal section and a second vertical section connected vertically; the first horizontal section and the second horizontal section are both strip-shaped structures, and the angle positioning bar (3) is connected between the two horizontal sections; the first vertical section and the second vertical section are both right-angled triangle structures, the right-angled short sides of the two vertical sections are connected and fixed, and the right-angled long sides of the two vertical sections are respectively connected and fixed with the corresponding horizontal sections.

5. The restoration ruler for adjusting the blade angle of a main fan according to claim 4 is characterized in that: The trough body (4) is fixed to the outer wall of the second vertical section of the second ruler (102), and the trough body (4) is a U-shaped bent plate fixedly connected to the second vertical section; the first vertical section and the second vertical section are both hollow plate structures.

6. The restoration ruler for adjusting the blade angle of a main fan according to claim 5, characterized in that: The marking pen (2) is a long strip structure, and the marking pen (2) can be fitted and inserted into the groove body (4).

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