阅读说明：本技术 一种用于汽轮机调门的内窥检修装置及方法 (Endoscopic maintenance device and method for turbine regulating valve ) 是由 穆延非 周国栋 李飞 邱旭 张波 刘鑫 于 2021-09-26 设计创作，主要内容包括：本发明公开一种用于汽轮机蒸汽调门的内窥检修装置及方法,一种用于汽轮机调门的内窥检修装置,包括柔性弹簧体、抓取机构以及照明和摄像装置,抓取机构以及照明和摄像装置均设置在柔性弹簧体的前端,照明和摄像装置连接显示模块；该装置能够方便地进入轮机蒸汽调门狭窄的通道内进行检修作业,从而提高了轮机蒸汽调门的检修质量,改善了设备技术状况,提高了设备运转率。(The invention discloses an endoscopic maintenance device and method for a steam turbine steam governing valve, the endoscopic maintenance device for the steam turbine governing valve comprises a flexible spring body, a grabbing mechanism and an illuminating and shooting device, wherein the grabbing mechanism and the illuminating and shooting device are arranged at the front end of the flexible spring body, and the illuminating and shooting device is connected with a display module; the device can conveniently get into and overhaul the operation in the constrictive passageway of turbine steam governing door to improve the maintenance quality of turbine steam governing door, improved equipment technical situation, improved equipment operating rate.)

1. The endoscopic maintenance device for the steam turbine valve is characterized by comprising a flexible spring body (4), a grabbing mechanism and an illuminating and shooting device (3), wherein the grabbing mechanism and the illuminating and shooting device (3) are arranged at the front end of the flexible spring body (4), and the illuminating and shooting device (3) is connected with a display module (8).

2. The endoscopic maintenance device for the steam turbine governor according to claim 1, characterized in that the grabbing mechanism comprises two elastic steel strips (1) and a limiting block (2), the limiting block (2) is disposed at the front end of the flexible spring body (4), the elastic steel strips (1) are disposed inside the flexible spring body (4), two rectangular openings are formed in the limiting block (2), the front end of the elastic steel strips (1) is bent into the shape of a mechanical claw, and the front end of the elastic steel strips (1) passes through the rectangular openings.

3. The endoscopic inspection device for the steam turbine governor according to claim 2, characterized in that a probe hole (6) is provided in the middle of the stopper (2), and the illumination and camera device (3) is provided in the probe hole (6).

4. The endoscopic inspection apparatus for steam turbine registers according to claim 2, characterized in that the cross section of the elastic steel strip (1) is rectangular.

5. The endoscopic device for a steam turbine governor according to claim 1, wherein the grasping mechanism comprises an electromechanical jaw to which a metal hose is connected, and a wire is passed through the metal hose to connect the electromechanical jaw.

6. Endoscopic inspection device for steam turbine shutters according to claim 5, characterized in that the lighting and video means (3) are provided on the electromechanical jaws.

7. The endoscopic device for steam turbine shutters according to claim 1, characterized in that length markings are provided on the flexible spring body (4).

8. The endoscopic inspection device for steam turbine shutters according to claim 1, characterized in that the lighting and camera device (3) is connected with a storage battery and a wireless communication module, the lighting and camera device (3) is connected with the display module (8) through the wireless communication module, and the storage battery supplies power to the lighting and camera device (3) and the wireless communication module.

9. The endoscopic device for steam turbine shutters according to claim 1, characterized in that the outside of the flexible spring body (4) is wrapped with a fiber sleeve.

10. The endoscopic maintenance method for the endoscopic maintenance device of the steam turbine control valve according to any one of claims 1 to 9, characterized in that the flexible spring body (4) extends into the interior of the L-shaped channel, the illumination device of the illumination and camera device (3) illuminates the interior of the L-shaped channel, the camera device collects the image information inside the L-shaped channel, and simultaneously displays the image information through the display module to assist in adjusting the flexible spring body (4) and the mechanical grabbing mechanism to grab the foreign object.

Technical Field

The invention belongs to the field of coal-fired power plant maintenance, and particularly relates to an endoscopic maintenance device and method for a steam turbine valve.

Background

The load of a steam turbine of a thermal power plant is generally adjusted by changing the amount of steam entering the steam turbine, and currently, common adjustment methods include throttling adjustment, nozzle adjustment and sliding pressure adjustment. Throttling is characterized in that all steam entering the turbine passes through a steam throttle and then flows to a first-stage nozzle. The regulating mode is mainly used for regulating the steam quantity in a throttling mode by changing the opening of the regulating steam valve, and the steam regulating valve is widely applied to units with various loads due to simple structure and low manufacturing cost.

Because the high-medium pressure and high-pressure combined steam governing valve of the steam turbine is in a severe working environment with high temperature, high pressure and pressure of 0.12-22.7 Mpa and temperature of about 535 ℃, the valve core and the valve seat are easy to be eroded by steam flow to generate leakage. In order to adapt to the condition that the network can be accessed by the renewable energy sources in the future, the operation flexibility of the coal-fired power plant needs to be improved, the unit is required to be capable of operating under a low enough load, and the load lifting speed of the unit is required to be rapid enough. Therefore, during the flexible peak shaving operation of the coal-fired power plant, the gate is required to frequently perform actions. During the frequent operation of the steam valve, an accident of breaking of the over-gate valve seat has occurred. Broken pieces of the valve seat of the regulating valve have great hidden trouble to the safe operation of the steam turbine. Fragments may block the nozzle and may even enter the cylinder with the risk of blade rupture.

Because the nozzle and the channel of the steam turbine are generally L-shaped, fragments of the regulating valve seat body of the steam turbine cannot be directly picked up. The common maintenance method needs to completely disassemble the valve body and the valve core of the valve. Therefore, the overhaul operation of the steam regulating valve of the turbine is long in time and complicated in steps, and the steam regulating valve can be damaged.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides an endoscopic inspection device and an endoscopic inspection method for a steam turbine governor, wherein the body of the endoscopic inspection device is flexible and can conveniently enter an L-shaped nozzle channel for inspection and peering, and the end part of the device is provided with a mechanical claw structure, so that fragments of the steam turbine governor can be conveniently and directly clamped and taken out.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides an interior maintenance device of peeping for steam turbine valve, includes flexible spring body, snatchs mechanism and illumination and camera device and all sets up the front end at flexible spring body, and illumination and camera device connect display module.

The grabbing mechanism comprises two elastic steel bars and a limiting block, the limiting block is arranged at the front end of the flexible spring body, the elastic steel bars are arranged on the inner side of the flexible spring body, two rectangular openings are formed in the limiting block, the front end of each elastic steel bar is bent into a mechanical claw shape, and the front end of each elastic steel bar penetrates through the rectangular openings.

The middle part of the limiting block is provided with a probe hole, and the illuminating and camera device is arranged in the probe hole.

The cross section of the elastic steel bar is rectangular.

The grabbing mechanism comprises an electric mechanical claw, the electric mechanical claw is connected with a metal hose, and a conducting wire penetrates through the metal hose to be connected with the electric mechanical claw.

The lighting and camera device is arranged on the electric gripper.

The flexible spring body is provided with length marks.

The illuminating and camera shooting device is connected with a storage battery and a wireless communication module, the illuminating and camera shooting device is connected with the display module through the wireless communication module, and the storage battery supplies power to the illuminating and camera shooting device and the wireless communication module.

The outer side of the flexible spring body is wrapped with a fiber sleeve.

Based on the method for the endoscopic maintenance device, the flexible spring body extends into the L-shaped channel, the lighting device of the lighting and camera device illuminates the interior of the L-shaped channel, the camera device collects image information in the interior of the L-shaped channel, and meanwhile, the display module displays the image information to assist in adjusting the flexible spring body and the mechanical grabbing mechanism to grab foreign matters.

Compared with the prior art, the invention has at least the following beneficial effects: the device of the invention can not only ensure that the interior of the regulating valve body and the valve core are not detected under the condition of thorough disassembly, but also can pick up broken fragments of the regulating valve seat body damaged in a narrow space, thereby improving the maintenance quality of the turbine steam regulating valve, improving the technical condition of equipment and being beneficial to improving the operation rate of the equipment.

Drawings

Fig. 1 is a schematic structural view of an endoscopic maintenance device for a steam governor of a steam turbine.

Fig. 2 is a schematic view of the gripper gripping process.

The method comprises the following steps of 1-an elastic steel bar, 2-a limiting block, 3-an illuminating and camera device, 4-a flexible spring body, 5-a locking block, 6-a probe hole, 7-a lead, 8-a display module and 9-a split of a door adjusting seat body.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings 1 and 2.

An endoscopic maintenance device for a turbine valve comprises a flexible spring body 4, a grabbing mechanism and an illuminating and camera device 3, wherein the grabbing mechanism and the illuminating and camera device 3 are arranged at the front end of the flexible spring body 4, and the illuminating and camera device 3 is connected with a display module 8.

Snatch mechanism includes two elasticity billet 1 and stopper 2, and stopper 2 sets up at the front end of the flexible spring body 4, and elasticity billet 1 sets up at the internal 4 inboards of flexible spring, sets up two rectangle openings on stopper 2, and the front end of elasticity billet 1 is buckled to the shape of gripper, and the front end of elasticity billet 1 passes the rectangle opening.

The middle part of the limiting block 2 is provided with a probe hole 6, and the illuminating and camera device 3 is arranged at the hole.

The cross section of elasticity billet 1 is the rectangle, and elasticity billet 1 rear end sets up latch segment 5, can lock elasticity billet 1.

The grabbing mechanism comprises an electric mechanical claw, the electric mechanical claw is connected with a metal hose, and a conducting wire penetrates through the metal hose to be connected with the electric mechanical claw.

The lighting and camera means 3 are arranged on the electromechanical gripper.

The flexible spring body 4 is provided with length marks.

The lighting and camera device 3 is connected with a storage battery and a wireless communication module, the lighting and camera device 3 is connected with the display module 8 through the wireless communication module, and the storage battery supplies power to the lighting and camera device 3 and the wireless communication module.

The outer side of the flexible spring body 4 is wrapped by a fiber sleeve.

Based on the method for the endoscopic maintenance device, the flexible spring body 4 extends into the L-shaped channel, the lighting device of the lighting and camera device 3 lights the interior of the L-shaped channel, the camera device collects image information in the interior of the L-shaped channel, and meanwhile, the display module displays the image information to assist in adjusting the flexible spring body 4 and the mechanical grabbing mechanism to grab foreign matters.

As shown in fig. 1, the main body of the endoscopic inspection device for the steam governor of the steam turbine is a flexible spring body 4, and the flexible spring body 4 is convenient to bend within a certain deflection range and is easy to enter a nozzle of the steam turbine and an L-shaped channel.

The head of the elastic steel strip 1 is bent into the shape of a mechanical claw and placed inside the flexible spring body 4. The cross section of the elastic steel bar 1 is rectangular and is sleeved in the limiting block 2 at the head of the flexible spring body 4. The limiting block 2 is provided with a rectangular opening for installing the elastic steel bar 1 with a rectangular cross section and the mechanical claw, and the limiting block is limited not to rotate, so that the grabbing is influenced.

The middle of the limiting block 2 is provided with a round opening for installing the lighting and camera device 3, the lighting and camera device 3 can monitor the condition inside the L-shaped nozzle channel, and the lighting and camera device 3 is connected with the wireless video transmission module through a wire 7. The wireless video transmission module sends video signals for installing illumination and monitoring by the camera device 3, so that the position and the direction of the endoscopic maintenance device can be conveniently adjusted, and fragments 9 of the seat body of the adjusting door can be accurately grabbed.

As shown in figure 2, the fragments 9 of the valve seat body drop into the nozzle of the L-shaped steam turbine and the interior of the channel, and the endoscopic maintenance device extends into the interior of the L-shaped channel. Because the flexible spring body 4, the steel bar and the mechanical claw 1 are flexible body structures, the flexible spring body has certain deflection and is convenient to enter the L-shaped channel.

The lighting device of the lighting and camera device 3 illuminates the inside of the L-shaped channel, and the camera device takes a picture of the environmental conditions in the L-shaped channel and sends out the video signal through the wireless video transmission module. A mobile phone or other wireless video signal receiving device 8. The position and the depth of the mechanical claw of the endoscopic maintenance device can be conveniently adjusted.

Because the cross section is inside rectangular elasticity billet and gripper 1 arranged in flexible spring body 4, and install on stop device 2, under stop device and 2 flexible spring body 4's restraint, the elastic billet 1 of axial extension, then the gripper can close to can carry out the centre gripping with adjusting door pedestal fragment 9 and take out.

This steam turbine steam governing door overhauls device not only can guarantee that the valve body and case are not detected its inside under the condition of thoroughly disassembling, can pick up the broken accent door pedestal fragment that falls of damage in the narrow space moreover to the maintenance quality of turbine steam governing door has been improved, has improved the equipment technology situation, has improved equipment operating rate.