Leveling tool for steam turbine cylinder

Abstract

The steam turbine cylinder leveling tool is characterized by comprising at least four cylindrical cups made of stainless steel and a hose for sequentially connecting the cylindrical cups to form a communicated closed loop, and the bottom surfaces of the cylindrical cups are reference planes. The cylinder cups are connected through the hose to form a communicated closed loop which is equivalent to a communicating device of a closed loop structure, the cylinder cups are evenly arranged on the air cylinder at intervals, surface measurement leveling and longitudinal and transverse leveling of the air cylinder are achieved through the fact that liquid levels in the cylinder cups are flush, operation is simple and easy to achieve, leveling is accurate and reliable, and the leveling precision is high. The method is superior to a leveling mode of longitudinal and transverse linear measurement, improves the operability and efficiency of cylinder leveling, effectively reduces the levelness error of the cylinder, and ensures that the levelness of the cylinder meets the requirements of a steam turbine.

Description

Technical Field

[0001] The utility model relates to a steam turbine cylinder leveling tool, which is used for leveling the cylinder during the steam turbine overhaul. Background Art

[0002] Steam turbines are the main equipment in modern thermal power plants. The cylinders of steam turbines are generally barrel-shaped. The installation and maintenance of steam turbines involve the leveling of the cylinders. Generally, the method of adjusting the bottom support of the cylinders several times is adopted to measure the leveling of the cylinders. Due to the large size, longitudinal and transverse leveling are required during the leveling process. The longitudinal leveling is generally measured on the cylinder plane several times using tools such as a level gauge. For transverse leveling, a level ruler needs to be placed on the cylinder horizontally. The measurement accuracy is low, resulting in large errors in the horizontality of the cylinders. Moreover, the longitudinal and transverse leveling are line measurement leveling methods, which are cumbersome and require multiple measurements and adjustments during the operation. It takes a long time and the operation is complicated, which affects the accuracy of the measurement and requires high proficiency of the operator. The large error in the horizontality of the cylinder can easily cause the cylinder to be skewed and deformed, affecting the overall structure of the steam turbine. Utility Model Content

[0003] The utility model provides a turbine cylinder leveling tool, which utilizes a hose to connect multiple cylinder cups to form a connected closed loop, which is equivalent to a connector that forms a closed-loop structure. The cylinder cups are evenly spaced on the cylinder, and the flushing of the liquid levels in the cylinder cups is utilized to form surface measurement and leveling of the cylinder. The longitudinal and transverse levels are leveled together, and the operation is simple and easy to implement, and the leveling is accurate and reliable. It is superior to the leveling method of longitudinal and transverse line measurement separately, and the operability and efficiency of cylinder leveling are improved, and the horizontal error of the cylinder is effectively reduced, so as to ensure that the horizontality of the cylinder meets the requirements of the turbine.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] The steam turbine cylinder leveling tool is characterized by comprising a stainless steel cylinder cup and a hose that connects multiple cylinder cups in sequence to form a connected closed loop, the number of the cylinder cups is at least four, and the bottom surface of the cylinder cup is a reference plane.

[0006] Preferably, the barrel cup is provided with radial connection holes, the number of the connection holes is two and they are symmetrically distributed on the barrel cup, the threads in the connection holes are matched with the connection adapter, the hose is connected to the adapter, and the connection holes are close to the bottom surface of the barrel cup.

[0007] Preferably, a liquid scale line is engraved on the inner wall of the barrel cup, and the liquid scale line is located above the connecting hole.

[0008] Preferably, the adapter is integrally formed by a middle section and threaded sections arranged at both ends of the middle section and with an outer diameter smaller than that of the middle section, a step surface is formed between the threaded section and the middle section, a sealing ring is sleeved on the threaded section and abuts against the step surface, and the connecting hole is a step hole that cooperates with the adapter.

[0009] Preferably, the hose is a retractable corrugated hose.

[0010] The beneficial effects of the utility model are:

[0011] The utility model provides a steam turbine cylinder leveling tool, which connects a plurality of cylinder cups with a hose to form a connected closed loop. When leveling the cylinder, the cylinder cups are first placed on the cylinder at uniform intervals along the circumferential direction, and then liquid is poured into the cylinder cups. The liquid flows to each cylinder cup along the hose. If there is a horizontal deviation in the cylinder, the liquid in the cylinder cup at a higher position will flow to the cylinder cup at a lower position, so that the distance between the liquid level in the cylinder cup at a higher position and the top surface of the cylinder cup is greater than the distance between the liquid level in the cylinder cup at a lower position and the top surface of the cylinder cup. When the liquid level in each cylinder cup is stable, the distance between the liquid level in each cylinder cup and the top surface of the cylinder cup is measured with a depth micrometer, and the cylinder is leveled according to each measured value until the cylinder is leveled. If the difference between any two measured values ​​is within the set error range, it means that the liquid in each cup is level, the cylinder is leveled, and the cylinder level meets the set requirements. A hose is used to connect multiple cups to form a connected closed loop, which is equivalent to a connector that forms a closed-loop structure. The cups are evenly spaced on the cylinder, and the level of the liquid level in each cup is used to form a surface measurement and leveling of the cylinder. The longitudinal and transverse levels are leveled together. The operation is simple and easy to implement, and the leveling is accurate and reliable. It is better than the leveling method of longitudinal and transverse line measurement separately, improves the operability and efficiency of cylinder leveling, effectively reduces the horizontal error of the cylinder, and ensures that the horizontality of the cylinder meets the requirements of the turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a top view of the steam turbine cylinder leveling tool in a specific implementation manner.

[0013] Figure 2 This is a schematic diagram of the adapter installed on the barrel cup.

[0014] Figure 3 A schematic diagram of the adapter.

[0015] Figure 4 It is a half-section schematic diagram of a connecting hole opened on a barrel cup. DETAILED DESCRIPTION

[0016] Combine the following Figures 1 to 4 The embodiments of the present utility model are described in detail.

[0017] The steam turbine cylinder leveling tool is characterized by comprising a cylindrical cup 1 made of stainless steel and a hose 2 which connects a plurality of cylindrical cups 1 in sequence to form a connected closed loop, the number of the cylindrical cups 1 is at least four, and the bottom surface of the cylindrical cup 1 is a reference plane.

[0018] The steam turbine cylinder leveling tool described above uses the bottom surface of the cylinder cup 1 as the reference plane. When the cylinder cup 1 is placed on a horizontal plane, it will not tilt, ensuring the reliability of leveling. A plurality of cylinder cups 1 are connected with a hose 2 to form a connected closed loop. When leveling the cylinder, the cylinder cups 1 are first placed on the cylinder at uniform intervals along the circumference, and then liquid is poured into the cylinder cups 1. The liquid 1 flows along the hose 2 to each cylinder cup 1. If there is a horizontal deviation in the cylinder, the liquid in the cylinder cup 1 at a higher position will flow to the cylinder cup 1 at a lower position, so that the distance between the liquid level in the cylinder cup 1 at a higher position and the top surface of the cylinder cup is greater than the distance between the liquid level in the cylinder cup 1 at a lower position and the top surface of the cylinder cup. When the liquid level in each cylinder cup 1 is stable, a depth micrometer is used to measure the distance between the liquid level in each cylinder cup 1 and the top surface of the cylinder cup. The distance between the cylinder and the cylinder is leveled according to each measurement value until the difference between any two measurement values ​​is within the set error range, indicating that the liquid in each cup is flush, the cylinder is leveled in place, and the cylinder level meets the set requirements. A hose 2 is used to connect multiple cups to form a connected closed loop, which is equivalent to a connector forming a closed-loop structure. The cups 1 are evenly spaced on the cylinder, and the flushness of the liquid levels in each cup is used to form a surface measurement and leveling of the cylinder. The longitudinal and transverse levels are leveled together, which is simple to operate and easy to implement, and the leveling is accurate and reliable, which is better than the leveling method of longitudinal and transverse line measurement separately, improves the operability and efficiency of cylinder leveling, effectively reduces the horizontal error of the cylinder, and ensures that the horizontality of the cylinder meets the requirements of the turbine.

[0019] The cylindrical cup 1 is provided with a radial connection hole 11, the number of the connection holes 11 is two and they are symmetrically distributed on the cylindrical cup 11, the connection hole 11 is threadedly connected to the adapter 3, the hose 2 is connected to the adapter 3, and the connection hole 11 is close to the bottom surface of the cylindrical cup 1. The adapter 3 is connected to the connection hole 11, and the adapter 3 is connected to the hose 2, so that multiple cylindrical cups 1 are connected to form a connected closed loop structure. As shown in the figure, the number of cylindrical cups 1 is four. When leveling and measuring, the four cylindrical cups 1 are placed along the circumferential direction and close to the edge of the cylinder, and the connection hole 11 is close to the bottom surface of the cylindrical cup, so as to ensure that when a certain amount of liquid is added to any cylindrical cup 1, it will flow along the hose 2 to each cylindrical cup 1.

[0020] Among them, the inner wall of the cylindrical cup 1 is engraved with a liquid scale line 12, and the liquid scale line 12 is located above the connecting hole 11. When each cylindrical cup is placed on the cylinder, liquid can be added into the cylindrical cup according to the liquid scale line 12. When the liquid level in each cylindrical cup 1 is on the liquid scale line 12, the distance between the liquid level of each cylindrical cup 1 and the top surface of the cylindrical cup can be directly measured and leveled with a depth micrometer. When the liquid level in at least one cylindrical cup is higher or lower than the liquid scale line 12, the cylinder can be initially leveled first. When the leveling is such that the liquid level of each cylindrical cup is on the liquid scale line 12, the distance between the liquid level of each cylindrical cup and the top surface of the cylindrical cup can be measured with a depth micrometer and re-leveled. The liquid level is preliminarily marked with the liquid scale line 12, so as to further simplify the leveling operation and improve the operability and efficiency of the leveling.

[0021] The adapter 3 is formed integrally by a middle section 31 and threaded sections 32 disposed at both ends of the middle section 31 and having an outer diameter smaller than that of the middle section 31. A step surface 33 is formed between the threaded section 32 and the middle section 31. A sealing ring is sleeved on the threaded section 32 to abut against the step surface 33. The connecting hole 11 is a step hole matched with the adapter 3. The threaded section 32 is used for connection with the hose 2 and the barrel cup 1. The sealing ring is clamped between the adapter 3 and the barrel cup 1 and forms a seal with the adapter 3 and the hose 2 as the threaded section 32 is screwed in, so as to avoid liquid leakage and ensure that the liquid level in the barrel cup 1 will not change due to liquid leakage during the leveling process.

[0022] The hose 2 is a retractable corrugated hose, which is convenient for setting the distance between adjacent cylinder cups 1 according to the outer diameter of the cylinder, and can be used for leveling cylinders of various sizes, thereby improving practicality.

[0023] The above is a complete description of the technical solutions of the embodiments of the utility model in combination with the accompanying drawings. It should be noted that the described embodiments are only part of the embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

Claims

1. Steam turbine cylinder leveling tool, characterized by: It includes a stainless steel barrel cup and a hose that connects a plurality of barrel cups in sequence to form a connected closed loop, the number of the barrel cups is at least four, and the bottom surface of the barrel cup is a reference plane; The barrel cup is provided with two radial connection holes which are symmetrically distributed on the barrel cup. The threads in the connection holes are matched with the connecting adapter, the hose is connected to the adapter, and the connection holes are close to the bottom surface of the barrel cup.

2. The steam turbine cylinder leveling tool according to claim 1, characterized in that: The inner wall of the cylinder cup is engraved with liquid scale lines, and the liquid scale lines are located above the connecting hole.

3. The steam turbine cylinder leveling tool according to claim 1, characterized in that: The adapter is integrally formed by a middle section and threaded sections arranged at both ends of the middle section and having an outer diameter smaller than that of the middle section. A step surface is formed between the threaded section and the middle section. A sealing ring is sleeved on the threaded section to abut against the step surface. The connecting hole is a step hole that matches the adapter.

4. The steam turbine cylinder leveling tool according to claim 1, characterized in that: The hose is a retractable corrugated hose.

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