CN-224223573-U - Grinding tool for high-pressure steam valve of steam turbine

CN224223573UCN 224223573 UCN224223573 UCN 224223573UCN-224223573-U

Abstract

The utility model relates to the technical field of valve grinding, and discloses a steam turbine high-pressure steam valve grinding tool, which comprises a grinding rod, wherein the surface of the grinding rod is connected with a grinding valve core in a sliding manner, the bottom of the surface of the grinding rod is provided with a fixed groove, the top of the grinding valve core is provided with a plug-in groove, the top of the surface of the grinding valve core is provided with a connecting groove, the inside of the grinding rod is provided with a fixing device, the surface of the grinding rod is provided with a positioning device, the top of the grinding rod is fixedly connected with a joint, the positioning device comprises a positioning disc, the top of the positioning disc is provided with an observation hole, the top of the positioning disc is provided with a positioning hole, the bottom of the positioning disc is fixedly connected with a positioning ring, and the surface of the positioning ring is provided with a screw thread. According to the utility model, the positioning holes at the top of the positioning disk are taken out from the grinding rod, then the adaptive positioning disk is selected according to the inner diameter of the spigot of the high-pressure valve cover, and each valve with different sizes can be ground by replacing the positioning disk, so that the fixity of a tool is simplified.

Inventors

LIU CHUNXIANG
ZHAO YU
ZHANG LEI
DU HONGJUN
YANG MING
JIA YINGCHAO
ZHANG WENJIE
ZHAO RUIGANG
ZHANG XIN
HU GUOWEI
HOU JUN
ZHANG GUOSHUAI
CHENG HUIBING
SUN LIMING

Assignees

山西崇光发电有限责任公司

Dates

Publication Date: 20260512
Application Date: 20250611

Claims (7)

1. Steam turbine high pressure steam valve grinding tool, its characterized in that, including grinding pole (1), the surface sliding connection of grinding pole (1) has grinding case (2), fixed slot (3) are opened to grinding pole (1) surface bottom, spliced groove (4) have been seted up at the top of grinding case (2), spread groove (5) have been seted up at grinding case (2) surface top, the inside of grinding pole (1) is provided with fixing device (6), the surface of grinding pole (1) is provided with positioner (7), the top fixedly connected with joint (8) of grinding pole (1).
2. The high-pressure steam valve grinding tool for steam turbines according to claim 1, wherein the surface of the grinding rod (1) is in sliding connection with the inner wall of the fixed groove (3), the fixed groove (3) is communicated with the connecting groove (5), and the connecting groove (5) is communicated with the inserting groove (4).
3. The steam turbine high pressure steam valve grinding tool as set forth in claim 1, wherein the fixing means (6) comprises a bolt (61), and a nut (62) is screwed to a surface of the bolt (61).
4. The high-pressure steam valve grinding tool for steam turbines according to claim 3, wherein the bolt (61) is positioned in the grinding valve core (2), the surface of the bolt (61) is in sliding connection with the inner wall of the fixed groove (3), and the surface of the bolt (61) is in sliding connection with the inner wall of the connecting groove (5).
5. The steam turbine high-pressure steam valve grinding tool of claim 1, wherein the positioning device (7) comprises a positioning disc (71), an observation hole (72) is formed in the top of the positioning disc (71), a positioning hole (73) is formed in the top of the positioning disc (71), a positioning ring (74) is fixedly connected to the bottom of the positioning disc (71), threads (75) are formed on the surface of the positioning ring (74), and a braking snap ring (76) is connected to the surface of the positioning ring (74) in a threaded mode.
6. The steam turbine high-pressure steam valve grinding tool according to claim 5, wherein the positioning disc (71) is located on the surface of the grinding rod (1), the inner wall of the positioning hole (73) is in sliding connection with the grinding rod (1), two observation holes (72) are arranged, the two observation holes (72) are symmetrically and uniformly distributed in the center of the top of the positioning disc (71), and the positioning hole (73) is located in the middle of the observation hole (72).
7. The high-pressure steam valve grinding tool for a steam turbine according to claim 5, wherein the bottom of the positioning ring (74) is provided with through grooves, the through grooves at the bottom of the positioning ring (74) are communicated with the positioning holes (73), and a plurality of brake snap rings (76) are arranged.

Description

Grinding tool for high-pressure steam valve of steam turbine Technical Field The utility model relates to the technical field of valve grinding, in particular to a grinding tool for a high-pressure steam valve of a steam turbine. Background The high-pressure valve of the steam turbine is positioned on the main steam pipeline, and is subjected to high-temperature and high-pressure steam in operation, and under the high-temperature condition, the oxidation speed of metal can be suddenly increased within a certain temperature range. For iron-based alloys, an oxide layer is produced when the temperature is raised to a certain point. When the oxidation layer reaches a certain thickness, the oxidation layer is peeled off when the running condition is changed, when the oxidation layer is extruded by the valve core and the valve seat, the sealing surface is damaged to cause internal leakage of the valve, the internal leakage of the main steam valve can cause energy consumption increase, steam enters the steam turbine without effective utilization, the internal leakage seriously delays the idle running time of the rotor to cause abnormal rise of the rotating speed, and the stable running of the unit is affected. The long-term leakage causes the flushing of the internal parts of the equipment with groove marks, which has serious influence on the safe and economic operation of the unit. The valve grinding tool has the advantages that when the existing valve grinding tool is used for grinding, the grinding depth cannot be accurately positioned, only the valve seat is ground according to experience of an maintainer, excessive grinding and insufficient grinding quantity are easy to conduct, in the grinding process, the traditional manual grinding efficiency is low, the grinding quality is not easy to guarantee, the labor intensity of the maintainer is reduced, the maintenance efficiency and the maintenance grinding precision quality are improved, and the valve grinding tool is particularly flexible and changeable. Disclosure of utility model In order to solve the technical problems, the utility model provides a grinding tool for a high-pressure steam valve of a steam turbine. The steam turbine high-pressure steam valve grinding tool is realized by adopting the following technical scheme that the steam turbine high-pressure steam valve grinding tool comprises a grinding rod, the surface of the grinding rod is connected with a grinding valve core in a sliding manner, the bottom of the surface of the grinding rod is provided with a fixed groove, the top of the grinding valve core is provided with a plug-in groove, the top of the surface of the grinding valve core is provided with a connecting groove, the inside of the grinding rod is provided with a fixing device, the surface of the grinding rod is provided with a positioning device, and the top of the grinding rod is fixedly connected with a joint. According to the technical scheme, the positioning disc is the permanent magnetic disc at the same time, the permanent magnetic disc is aligned to the top of the valve seat through the grinding rod, when the handle rotates to the left side, the inner permanent magnet of the positioning disc is aligned to the magnetic conducting disc, the magnetic field is outwards dispersed and penetrates to the surface of the valve seat through the magnetic conducting disc to form a closed magnetic circuit, the valve seat metal is magnetized to enable the metal to generate adsorption force with the disc, so that stable fixation is achieved, after grinding is finished, the handle of the disc is rotated to the right side, the permanent magnet is aligned to the non-magnetic conducting isolation layer, magnetic lines of force form a self-closing loop inside the disc, the magnetic field on the surface of the magnetic conducting disc almost disappears, and the adsorption force is relieved, so that the disc can be easily taken down. The connector is fixed at the top of the grinding rod and is used for being connected with a speed change pistol in a threaded mode to rotate, power transmitted to the grinding rod by the speed change pistol is transmitted to the grinding rod, and then the grinding valve core is driven to conduct grinding work, so that the speed change pistol is a key component for power transmission. As a further improvement of the scheme, the surface of the grinding rod is in sliding connection with the inner wall of the fixed groove, the fixed groove is communicated with the connecting groove, and the connecting groove is communicated with the inserting groove. Through the technical scheme, the connecting groove is arranged at the top of the surface of the grinding valve core and is communicated with the fixed groove, and the connecting groove, the bolt and the nut form a fixed structure together, so that the grinding rod is firmly connected with the grinding valve core, and the stability of grinding work is ensured. As a further improv