Method for oppositely grinding junction surfaces of valve core and valve bottom of boiler steam soot blower

Abstract

The invention discloses an opposite grinding method for a valve element and valve bottom combination surface of a boiler steam soot blower. A boiler steam soot blower works in a high-temperature and high-pressure environment for a long time and acts frequently, abrasion of a valve core and a valve bottom is easily caused, and the soot blower generates an inner leakage phenomenon. The device comprises a valve core fixer and a grinding fixer, the grinding fixer is fixed between the valve core fixer and a soot blower lifting valve, a grinding handle is welded on the valve core fixer and is longer than the valve core fixer, and an inner ring of the valve core fixer is in linear contact with the bottom of a valve core. The grinding device is used for oppositely grinding the combination surfaces of the valve element and the valve bottom of the boiler steam soot blower.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of grinding devices, especially a kind of boiler steam soot blower valve core and valve bottom joint surface relative grinding device. BACKGROUND

[0002] Boiler steam soot blower is mainly used to remove the ash and slag on the heating surface of boiler, keep the heating surface clean, reduce the heat loss of flue gas, and improve the heat transfer efficiency of boiler. The ash on the heating surface can cause the temperature of the tube wall of superheater and reheater to rise, increasing the risk of tube burst. By cleaning the heating surface with soot blower, the risk can be effectively reduced to ensure the safe operation of the boiler. Regular use of soot blower for cleaning can reduce the ash on the heating surface and help improve the low-temperature corrosion of the heating surface.

[0003] Boiler steam soot blower works in a high-temperature and high-pressure environment for a long time, and operates frequently, which can easily cause wear of the valve core and valve bottom, leading to internal leakage of the soot blower. SUMMARY

[0004] The present application aims to provide a method for grinding the joint surface between the valve core and the valve bottom of a boiler steam soot blower to solve the above technical problems.

[0005] The above-mentioned purpose is achieved by the following technical solution: A method for grinding the joint surface between the valve core and the valve bottom of a boiler steam soot blower, comprising the following steps: (1) Apply grinding paste to the valve bottom of the soot blower poppet valve, and place the valve core on the valve bottom of the soot blower poppet valve; (2) Place the grinding fixture of the relative grinding device for the joint surface between the valve core and the valve bottom of a boiler steam soot blower on the soot blower poppet valve, and place the valve core fixture on the valve core; (3) The operator presses the grinding fixture with one hand, and rotates the bearing on the grinding handle with the other hand. Under the drive of the grinding handle, the valve core fixture drives the valve core to rotate, achieving the relative grinding of the joint surface between the valve core and the valve bottom of the soot blower poppet valve.

[0006] The grinding fixture is fixed between the valve core fixture and the soot blower poppet valve. The grinding handle is welded to the valve core fixture and longer than the valve core fixture. The inner ring of the valve core fixture is in line contact with the bottom of the valve core.

[0007] The valve core fixture and the grinding fixture are in sliding fit, and the upper limit is controlled by the inner diameter platform of the two.

[0008] The method for grinding the valve core and valve bottom mating surfaces of a boiler steam soot blower, wherein the inner ring of the valve core retainer has multiple protrusions. Beneficial effects

[0009] 1. This invention is easy and simple to operate, the device is portable, safe and reliable, and has good centering stability, ensuring precise grinding; it has high work efficiency, one person can complete the grinding, reducing labor intensity and saving labor costs; it improves the service life of the equipment, reduces spare parts costs, and ensures the safe and stable operation of the boiler.

[0010] 2. The grinding handle of this invention is the power input end. One end drives the valve core retainer to rotate through the hand crank bearing, which in turn drives the valve core to rotate. The grinding retainer is fixed between the valve core retainer and the soot blower lifting valve to ensure the rotational stability between the valve core and the soot blower lifting valve mating surface during grinding. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Enlarged image; Figure 3 This is a schematic diagram of the grinding handle. Figure 4 This is a schematic diagram of the grinding fixture. Figure 5 This is a schematic diagram of the valve core retainer. Figure 6 This is a schematic diagram of the valve core structure; In the diagram: 1. Grinding handle; 2. Grinding retainer; 3. Valve core retainer; 4. Valve core; 5. Soot blower lifting valve; 6. Hand crank bearing; 7. Inner diameter table; 8. Protrusion. Detailed Implementation

[0012] Reference Figures 1-6 A method for grinding the mating surfaces of a boiler steam soot blower valve core and valve bottom together, the method comprising the following steps: (1) Apply polishing paste to the bottom of the sootblower lifting valve and place the valve core on the bottom of the sootblower lifting valve; (2) Place the grinding device grinding fixture on the soot blower lifting valve and the valve core fixing device on the valve core mating surface of the boiler steam soot blower. (3) The operator presses the grinding fixture with one hand and rotates the bearing on the grinding handle with the other hand. Under the drive of the grinding handle, the valve core fixture drives the valve core to rotate, thus realizing the relative grinding of the valve core and the bottom joint surface of the soot blower lifting valve.

[0013] A kind of boiler steam soot blower valve core and valve bottom joint surface relative grinding method, its composition includes valve core fixer 3 and grinding fixer 2, the grinding fixer is fixed between valve core fixer and soot blower poppet 5, grinding handle 1 is welded on valve core fixer and longer than the valve core fixer, the inner circle of the valve core fixer is in line contact with the bottom of valve core 4.

[0014] The valve core fixer and grinding fixer are slidingly fitted, and the upper limit position is controlled by the inner diameter platform 7 of both.

[0015] The inner circle of the valve core fixer has multiple protrusions 8.

[0016] Grinding handle 1 is the power input end, a solid cylinder is installed on the operating end of the grinding handle, a hand bearing is installed on the solid cylinder, the hand bearing is a deep groove ball bearing with an inner diameter of 12 mm and an outer diameter of 32 mm, one end drives the valve core fixer 3 to rotate through the hand bearing 6, and then drives the valve core 4 to rotate, the grinding fixer 2 is fixed between the valve core fixer 3 and the soot blower poppet 5, to ensure the stable rotation between the joint surface of the valve core 4 and the soot blower poppet 5 during grinding.

[0017] The gap between the outer diameter of the grinding fixer and the inner diameter of the soot blower poppet is 0.5 mm, and the gap between the inner diameter of the grinding fixer and the outer diameter of the valve core fixer is 0.5 mm, which is very small to ensure that the valve core does not shake after being fixed; The valve core fixer 3 and the grinding fixer 2 can move up and down relative to each other, and the upper limit position is controlled by the inner diameter platform 7 of both, as shown in the figure, the outer side surface of the valve core fixer is a convex ring surface, the inner side surface of the grinding fixer is a concave ring surface, and the upper limit position of the valve core fixer is controlled by the inner diameter platform (0.95 mm) of both; the grinding handle is welded on the valve core fixer and longer than the valve core fixer, to control the lower limit position.

[0018] The inner circle of the valve core fixer 3 is in line contact with the bottom of the valve core 4, and five protrusions 8 are arranged inside the inner circle of the valve core fixer 3 to increase the contact area and drive the valve core to rotate.

[0019] In use, apply grinding paste on the bottom of the soot blower poppet 5, place the valve core 4 on the bottom of the soot blower poppet 5, place the grinding fixer 2 of the boiler steam soot blower valve core and valve bottom joint surface relative grinding device on the soot blower poppet 5, place the valve core fixer 3 on the valve core, press the grinding fixer 2 with one hand, and turn the bearing 6 on the grinding handle 1 with the other hand, under the drive of the grinding handle 1, the valve core fixer 3 drives the valve core 4 to rotate, which realizes the relative grinding of the joint surface of the valve core 4 and the bottom of the soot blower poppet 5.

Claims

1. A method for grinding the mating surfaces of the valve core and valve bottom of a boiler steam soot blower, characterized in that: The method includes the following steps: (1) Apply polishing paste to the bottom of the sootblower lifting valve and place the valve core on the bottom of the sootblower lifting valve; (2) Place the grinding device grinding fixture on the soot blower lifting valve and the valve core fixing device on the valve core mating surface of the boiler steam soot blower. (3) The operator presses the grinding fixture with one hand and rotates the bearing on the grinding handle with the other hand. Under the drive of the grinding handle, the valve core fixture drives the valve core to rotate, thus realizing the relative grinding of the valve core and the bottom joint surface of the soot blower lifting valve.

2. The method for grinding the mating surfaces of the valve core and valve bottom of a boiler steam soot blower according to claim 1, characterized in that: The grinding fixture is fixed between the valve core fixture and the soot blower lifting valve. The grinding handle is welded to the valve core fixture and is longer than the valve core fixture. The inner ring of the valve core fixture is in contact with the bottom line of the valve core.

3. The method for grinding the mating surfaces of the valve core and valve bottom of a boiler steam soot blower according to claim 2, characterized in that: The valve core retainer and the grinding retainer slide together, and the upper limit is controlled by the inner diameter table surface of both.

4. The method for grinding the mating surfaces of the valve core and valve bottom of a boiler steam soot blower according to claim 3, characterized in that: The valve core retainer has multiple protrusions inside its inner ring.

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