阅读说明：本技术 一种汽轮机低压阀组检修支撑装置及方法 (Steam turbine low-pressure valve group maintenance supporting device and method ) 是由 柴广 曹亮亮 薛彦春 陈亮 赵勇 余浩 许准 别国泰 王仁昌 于 2020-12-30 设计创作，主要内容包括：本发明属于机械设备检修技术领域,具体涉及一种汽轮机低压阀组检修支撑装置及方法,该装置包括横梁、支撑杆、支撑脚和支撑梁；其中,横梁与支撑杆连接组成整体框架,支撑脚连接在支撑杆底端,支撑梁连接在支撑梁顶部。本发明能实现对汽轮机低压阀组的可靠支撑与定位；可对检修中的汽轮机低压阀组进行有效的保护；可消除在使用常规汽轮机低压阀组检修支撑过程中存在的设备倾倒等风险；可避免在使用常规汽轮机低压阀组检修支撑方法过程中人身伤害、设备损伤等事故的发生；可避免在提高汽轮机低压阀组检修的效率、缩短汽轮机低压阀组检修的工时。(The invention belongs to the technical field of mechanical equipment maintenance, and particularly relates to a maintenance supporting device and a maintenance supporting method for a low-pressure valve group of a steam turbine, wherein the device comprises a cross beam, a supporting rod, supporting legs and a supporting beam; wherein, the crossbeam is connected with the bracing piece and is constituteed whole frame, and the supporting legs is connected in the bracing piece bottom, and a supporting beam connects at a supporting beam top. The invention can realize reliable support and positioning of the low-pressure valve bank of the steam turbine; the low-pressure valve bank of the steam turbine in the overhaul process can be effectively protected; the risks of equipment toppling and the like in the process of using the conventional low-pressure valve bank of the steam turbine for overhauling and supporting can be eliminated; the accidents of personal injury, equipment damage and the like in the process of using the conventional method for overhauling and supporting the low-pressure valve bank of the steam turbine can be avoided; the maintenance efficiency of the low-pressure valve bank of the steam turbine can be improved, and the maintenance working hours of the low-pressure valve bank of the steam turbine can be shortened.)

1. The utility model provides a steam turbine low pressure valves overhauls strutting arrangement which characterized in that: the device comprises a cross beam (3), a support rod (4), a support foot (5) and a support beam (6);

wherein, crossbeam (3) are connected with bracing piece (4) and are constituteed whole frame, and supporting legs (5) are connected in bracing piece (4) bottom, and a supporting beam (6) are connected at a supporting beam (4) top.

2. The turbine low pressure valve block service support device of claim 1, wherein: the cross beam (3) is welded in the middle of the support rod (4).

3. The turbine low pressure valve block service support device of claim 2, wherein: the support rod (4) is of a V-shaped structure.

4. The turbine low pressure valve block service support device of claim 3, wherein: the supporting beam (6) is welded on the top of the supporting rod (4).

5. The turbine low pressure valve block service support device of claim 4, wherein: and the supporting beam (6) is provided with a bolt (2).

6. The turbine low pressure valve block service support device of claim 5, wherein: the supporting beam (6) is fixedly connected with the protective pad (1) through a bolt (2).

7. The turbine low pressure valve block service support device of claim 6, wherein: the supporting legs (5) are welded at the bottom end of the supporting rod (4).

8. The method of claim 7, wherein the method comprises the steps of: the method comprises the following steps:

step 1, mounting a supporting device;

step 2, checking a supporting device;

step 3, low maintenance pressure valve group;

and 4, transporting the supporting device to a specified position for storage.

9. The method of claim 8, wherein the step of supporting the turbine low pressure valve block service support assembly comprises: the step 1 comprises the following steps:

step 1.1, checking and confirming that the lifting lug, the lifting belt and the crane are qualified;

and 1.2, transporting the support device to the site, moving and adjusting the position of the support device to enable the support device to be placed on the ground of the maintenance area of the low-pressure valve group, and using lifting lugs, lifting belts and a crane to assist in moving and adjusting the position of the support device.

10. The method of claim 9, wherein the step of supporting the turbine low pressure valve block service support assembly comprises: the step 2 comprises the following steps:

step 2.1, checking and confirming that the supporting device is moved to the designated position;

and 2.2, checking and confirming that the protection pad (1) is fixed on the support beam (6) through the bolt (2).

11. The method of claim 10, wherein the step of supporting the turbine low pressure valve block service support assembly comprises: the step 3 comprises the following steps:

3.1, hoisting the low-pressure valve bank by using the lifting lug, the lifting belt and the crane, moving the low-pressure valve bank to the position above the supporting device, stopping moving the low-pressure valve bank when the low-pressure valve bank moves to the position above the supporting device, checking and confirming that the center of the low-pressure valve bank is aligned with the center of the supporting device, placing the low-pressure valve bank on the supporting device, and adjusting the position of the low-pressure valve bank by using the lifting lug, the lifting belt and the;

step 3.2, checking and confirming that the low-pressure valve bank is stably placed and the valve bank is tightly attached to the protection pad (1);

3.3, removing the hanging strip and the lifting lug, and moving the crane to enable the crane to move to a specified position;

step 3.4, the low-pressure valve bank is overhauled according to requirements;

and 3.5, lifting the low-pressure valve bank by using the lifting lug, the lifting belt and the crane and moving the low-pressure valve bank to the top of the low-pressure cylinder.

Technical Field

The invention belongs to the technical field of mechanical equipment maintenance, and particularly relates to a low-pressure valve group maintenance supporting device and method for a steam turbine.

Background

The steam turbine is also called as a steam turbine engine, and is a rotary steam power device.A high-temperature high-pressure steam passes through a fixed nozzle to become an accelerated airflow and then is sprayed onto blades, so that a rotor provided with the blades rotates and does work outwards. The steam turbine has wide application and is main equipment for modern thermal power stations, nuclear power stations, biomass power generation and the like. The low-pressure valve bank of the steam turbine is arranged on a reheat steam inlet pipe and is used for limiting steam from entering a low-pressure cylinder from a steam-water separation reheater when the unit is used for load shedding. The valve group comprises a low-pressure main steam valve and a low-pressure regulating valve which are butterfly valves, and each valve is controlled by an independent actuating mechanism.

The middle of two valves of the valve group is connected by a pipeline, the valves and the middle pipeline form the valve group together, and the valves mainly comprise valve bodies, ball bearings and valve rods. The valve body and the ball bearing are sealed by a sealing structure in the form of a bellows. The valve rod is connected with the piston rod of the actuating mechanism by a connecting rod with a key and a crank with a radial pin. When the high-pressure working medium acts on the push type actuating mechanism, the valve is in an opening state. The angular movement of the valve body in the opening direction is limited by the stop lever and may additionally be limited by the stop bolt. The spring applies a closing force to the actuator piston rod at any time so that the valve can smoothly return to the closed position.

Because the low-pressure valve group is positioned at the top of the low-pressure cylinder of the steam turbine, the low-pressure valve group cannot be directly placed on the ground when the low-pressure cylinder of the steam turbine is disassembled for maintenance and the low-pressure valve group is disassembled for overhaul, and therefore a supporting device is needed to support the low-pressure valve group of the steam turbine. When the low-pressure valve group of the steam turbine is overhauled, the low-pressure valve group is temporarily supported by using sleepers in the prior art, equipment toppling risks exist in the method, and even personal injuries, equipment damages and other accidents can be caused when the condition is serious.

Therefore, it is necessary to provide a device and a method for overhauling and supporting a low-pressure valve bank of a steam turbine, so as to solve the problems in the prior art.

Disclosure of Invention

The invention aims to provide a low-pressure valve group overhauling and supporting device and a method for a steam turbine, so as to eliminate the risks of equipment toppling and the like existing in the traditional supporting device and avoid accidents such as personal injury, equipment damage and the like.

The technical scheme for realizing the purpose of the invention is as follows:

a low-pressure valve group maintenance supporting device of a steam turbine comprises a cross beam, a supporting rod, supporting legs and a supporting beam;

wherein, the crossbeam is connected with the bracing piece and is constituteed whole frame, and the supporting legs is connected in the bracing piece bottom, and a supporting beam connects at a supporting beam top.

The cross beam is welded in the middle of the support rod.

The support rod is of a V-shaped structure.

The supporting beam is welded on the top of the supporting rod.

And the supporting beam is provided with a bolt.

The supporting beam is fixedly connected with the protection pad through a bolt.

The supporting legs are welded at the bottom end of the supporting rod.

The supporting method of the turbine low-pressure valve group overhauling and supporting device comprises the following steps:

step 1, mounting a supporting device;

step 2, checking a supporting device;

step 3, low maintenance pressure valve group;

and 4, transporting the supporting device to a specified position for storage.

The step 1 comprises the following steps:

step 1.1, checking and confirming that the lifting lug, the lifting belt and the crane are qualified;

and 1.2, transporting the support device to the site, moving and adjusting the position of the support device to enable the support device to be placed on the ground of the maintenance area of the low-pressure valve group, and using lifting lugs, lifting belts and a crane to assist in moving and adjusting the position of the support device.

The step 2 comprises the following steps:

step 2.1, checking and confirming that the supporting device is moved to the designated position;

and 2.2, checking and confirming that the protection pad is fixed on the support beam through a bolt.

The step 3 comprises the following steps:

3.1, hoisting the low-pressure valve bank by using the lifting lug, the lifting belt and the crane, moving the low-pressure valve bank to the position above the supporting device, stopping moving the low-pressure valve bank when the low-pressure valve bank moves to the position above the supporting device, checking and confirming that the center of the low-pressure valve bank is aligned with the center of the supporting device, placing the low-pressure valve bank on the supporting device, and adjusting the position of the low-pressure valve bank by using the lifting lug, the lifting belt and the;

step 3.2, checking and confirming that the low-pressure valve bank is stably placed and the valve bank is tightly attached to the protection pad;

3.3, removing the hanging strip and the lifting lug, and moving the crane to enable the crane to move to a specified position;

step 3.4, the low-pressure valve bank is overhauled according to requirements;

and 3.5, lifting the low-pressure valve bank by using the lifting lug, the lifting belt and the crane and moving the low-pressure valve bank to the top of the low-pressure cylinder.

The invention has the beneficial technical effects that:

(1) the device can realize reliable support and positioning of the low-pressure valve bank of the steam turbine;

(2) the device is provided with a protection pad, and can effectively protect the low-pressure valve bank of the steam turbine during maintenance;

(3) the device can eliminate the risks of equipment toppling and the like in the process of using the conventional low-pressure valve bank of the steam turbine for overhauling and supporting;

(4) the device can avoid the occurrence of accidents such as personal injury, equipment damage and the like in the process of using the conventional low-pressure valve bank maintenance supporting method of the steam turbine;

(5) the device can avoid the maintenance efficiency of the low-pressure valve bank of the steam turbine being improved and the maintenance working hours of the low-pressure valve bank of the steam turbine being shortened.

Drawings

FIG. 1 is a front view of a low pressure valve block servicing support assembly for a steam turbine according to the present invention;

FIG. 2 is a side view of a low pressure valve block servicing support assembly for a steam turbine according to the present invention;

in the figure: 1-a protective pad; 2-bolt; 3-a cross beam; 4-a support bar; 5-supporting feet; 6-supporting beam.

Detailed Description

In order to make those skilled in the art better understand the present invention, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention. It should be apparent that the embodiments described below are only some, but not all, of the embodiments of the present invention. All other embodiments that can be derived by a person skilled in the art from the embodiments described herein without inventive step are within the scope of the present invention.

As shown in fig. 1 and fig. 2, the low-pressure valve group maintenance support device for the steam turbine provided by the invention comprises a protection pad 1, a bolt 2, a cross beam 3, a support rod 4, a support foot 5 and a support beam 6;

the beam 3 is positioned in the middle of the support rod 4;

the support rod 4 is of a V-shaped structure;

the cross beam 3 and the support rod 4 are connected together in a welding mode, and the cross beam and the support rod form a support device framework.

A supporting beam 6 welds at a supporting beam 4 top, and a supporting beam 6 is equipped with bolt 2, protection pad 1 is fixed in bracing piece 6 through bolt 2 for support steam turbine low pressure valves, and can protect low pressure valves not by the rigid extrusion.

The supporting feet 5 are welded at the bottom end of the supporting rod 4.

The invention also provides a supporting method of the turbine low-pressure valve group overhauling and supporting device, which comprises the following steps:

step 1, mounting a supporting device, comprising the following operations:

step 1.1, checking and confirming that the lifting lug, the lifting belt and the crane are inspected and qualified;

and 1.2, transporting the support device to the site, moving and adjusting the position of the support device to enable the support device to be stably and reliably placed on the ground of the maintenance area of the low-pressure valve group, and using lifting tools such as lifting lugs, lifting belts and cranes to assist in moving or adjusting the position of the support device when necessary.

Step 2, checking the supporting device, comprising the following operations:

step 2.1, checking and confirming that the supporting device is moved to the designated position and is placed stably and reliably;

step 2.2, checking and confirming whether the protection pad 1 is fixed on the supporting beam 6 through the bolt 2;

step 3, low-pressure valve group maintenance, which comprises the following operations:

3.1, hoisting the low-pressure valve bank by using hoisting tools such as a hoisting lug, a hoisting belt, a crane and the like, slowly moving the low-pressure valve bank to the position above the supporting device, stopping moving the low-pressure valve bank when the low-pressure valve bank moves to the position above the supporting device, checking and confirming that the center of the low-pressure valve bank is aligned with the center of the supporting device, slowly placing the low-pressure valve bank on the supporting device, and adjusting the position of the low-pressure valve bank by using the hoisting tools such as the hoisting lug, the hoisting;

step 3.2, checking and confirming that the low-pressure valve bank is placed stably and reliably, and the valve bank is in good contact with the protection pad 1 and is tightly attached;

3.3, removing the hanging strip and the lifting lug, and slowly moving the crane to enable the crane to move to a specified position;

step 3.4, the low-pressure valve bank is overhauled according to requirements;

and 3.5, hoisting the low-pressure valve bank by using hoisting tools such as a lifting lug, a lifting belt, a crane and the like and slowly moving the low-pressure valve bank to the top of the low-pressure cylinder.

And 4, transporting the supporting device to a specified position for storage.

The present invention has been described in detail with reference to the drawings and examples, but the present invention is not limited to the examples, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention. The prior art can be adopted in the content which is not described in detail in the invention.