Turboset valve adjusting pull rod structure with long service life

Abstract

The utility model discloses a steam turbine set regulating valve pull rod structure with long service life, which comprises a pull rod body and a flange, the pull rod body comprises a pull rod section, a connecting section and a clamping section which are sequentially connected from top to bottom, the flange is provided with a funnel-shaped clamping groove, the clamping groove is communicated with a through groove arranged at the top of the flange, the clamping section is clamped in the clamping groove, and the connecting section is connected with the clamping section. The outer wall of the clamping section is a cambered surface with the same grooving angle as the clamping groove, the connecting section is arranged in the through groove, a limiting groove is formed in the bottom of the clamping section, and the flange is connected with a limiting supporting plate inserted into the limiting groove on the inner wall of the bottom of the clamping groove. According to the utility model, the contact surface of the pull rod body and the flange is changed from plane support to spherical contact, and the contact area is flexibly increased, so that the transverse shear stress on the cylindrical surface of the pull rod caused by small-amplitude high-frequency swing of the cross beam due to the influence of steam flow is effectively reduced, and the stress distribution of the optimized pull rod is more uniform; and the stress concentration phenomenon is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of steam turbine valve support equipment, and in particular to a long-life steam turbine unit regulating valve tie rod structure. Background Technology

[0002] In the structure of a steam turbine unit, the regulating valve is one of the key components for controlling the operation of the steam turbine unit. It is used to regulate and control the steam flow rate entering the steam turbine unit so that the steam turbine unit can operate stably according to the technical requirements of controlled parameters (power or speed, inlet steam pressure, back pressure, etc.).

[0003] During turbine operation, the control valve lever constantly pulls the control valve beam, causing the control valve assembly to move up and down. When the beam and control valve assembly are affected by the steam flow, they swing, creating a gap between the beam and the lever. This results in repeated collisions between the beam and the lever, eventually causing the lever to break. Control valve levers frequently break during use, severely affecting the operation of the turbine unit. Utility Model Content

[0004] The purpose of this invention is to provide a long-life turbine generator control valve tie rod structure to solve the above-mentioned problems.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] This utility model discloses a long-life turbine unit control valve tie rod structure, including a tie rod body and a flange. The tie rod body includes a tie rod section, a connecting section, and a snap-fit ​​section connected sequentially from top to bottom. The flange has a funnel-shaped snap-fit ​​groove, which communicates with a through groove on the top of the flange. The snap-fit ​​section snaps into the snap-fit ​​groove, and the outer wall of the snap-fit ​​section is an arc surface with the same angle as the slot of the snap-fit ​​groove. The connecting section is placed in the through groove. A limit groove is formed at the bottom of the snap-fit ​​section. A limit support plate that inserts into the limit groove is connected to the bottom inner wall of the groove on the flange.

[0007] Furthermore, the bottom of the snap-fit ​​section is provided with four limiting grooves, the included angle between two adjacent limiting grooves is 90°, and the number of limiting plates connected to the flange corresponds to the number of limiting grooves.

[0008] Furthermore, the flange is provided with mounting holes.

[0009] Furthermore, a plurality of mounting slots are provided on the inner wall of the slot, and an auxiliary pressure roller is provided in the mounting slot. The auxiliary pressure roller is rotatably connected in the mounting slot through a rotating shaft, and the auxiliary pressure roller rolls and presses against the outer wall of the snap-fit ​​section.

[0010] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0011] This invention changes the contact surface between the tie rod body and the flange from a planar support to a spherical contact, while ensuring flexibility and increasing the contact area. This effectively reduces the transverse shear stress on the cylindrical surface of the tie rod when the crossbeam oscillates slightly at high frequency due to the influence of steam flow. The optimized tie rod has a more uniform stress distribution and no stress concentration. Furthermore, the auxiliary pressure roller reduces friction between the flange and the tie rod body, greatly improving the service life of the tie rod. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings.

[0013] Figure 1 This is a cross-sectional view of the turbine generator control valve tie rod structure with a long service life according to this utility model;

[0014] Figure 2 This is a bottom view of the turbine generator control valve tie rod structure with a long service life according to this utility model;

[0015] Explanation of reference numerals in the attached drawings: 1. Tie rod body; 101. Tie rod section; 102. Connecting section; 103. Snap-fit ​​section; 2. Flange; 3. Snap-fit ​​groove; 4. Through groove; 5. Limiting groove; 6. Limiting support plate; 7. Mounting hole; 8. Mounting groove; 9. Auxiliary pressure roller. Detailed Implementation

[0016] like Figure 1-2 As shown, a long-life turbine unit control valve tie rod structure includes a tie rod body 1 and a flange 2, wherein the flange 2 is provided with mounting holes 7.

[0017] The tie rod body 1 includes a tie rod section 101, a connecting section 102, and a snap-fit ​​section 103 connected sequentially from top to bottom. The flange 2 has a funnel-shaped slot 3, which communicates with a through groove 4 on the top of the flange 2. The snap-fit ​​section 103 snaps into the slot 3, and the outer wall of the snap-fit ​​section 103 is an arc surface with the same angle as the slot 3. The connecting section 102 is placed within the through groove 4.

[0018] The bottom of the snap-fit ​​section 103 has a limiting groove 5. The flange 2 is connected to the bottom inner wall of the snap-fit ​​groove 3 and a limiting support plate 6 is inserted into the limiting groove 5. The bottom of the snap-fit ​​section 103 has four limiting grooves 5. The included angle between two adjacent limiting grooves 5 is 90°. The number of limiting support plates 6 connected to the flange 2 corresponds to the number of limiting grooves 5.

[0019] The inner wall of the slot 3 is provided with a plurality of mounting slots 8, and an auxiliary pressure roller 9 is provided in the mounting slot 8. The auxiliary pressure roller 9 is rotatably connected in the mounting slot 8 through a rotating shaft, and the auxiliary pressure roller 9 rolls and presses against the outer wall of the snap-fit ​​section 103.

[0020] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A long-life governing valve rod structure for a steam turbine unit, characterized by: The utility model relates to a draw -in rod, including draw -in rod body (1) and flange (2), draw -in rod body (1) includes draw -in rod section (101), connecting section (102) and clamping section (103) from top to bottom are connected in proper order, the flange (2) is set up on and is clamped groove (3) funnel -shaped, the clamped groove (3) with the through slot (4) set up on the top of flange (2) intercommunication, clamping section (103) is clamped in clamped groove (3), and the outer wall of clamping section (103) is the arc surface same with the slotting angle of clamped groove (3), connecting section (102) is placed in through slot (4), the bottom of clamping section (103) is set up with the limiting groove (5), the flange (2) is connected with the limiting batten (6) of inserting into the limiting groove (5) on the bottom inner wall of clamped groove (3).

2. The long-life steam turbine valve linkage rod structure of claim 1, wherein: The bottom of clamping section (103) is set up with four limiting grooves (5), and the included angle between adjacent two limiting grooves (5) is 90 DEG, and the number of limiting batten (6) connected on the flange (2) corresponds with the number of limiting groove (5).

3. The long life steam turbine governing valve link structure as claimed in claim 1, wherein: The flange (2) is set up with mounting hole (7).

4. The long life steam turbine governing valve link structure as claimed in claim 1, wherein: The inner wall of clamped groove (3) is set up with a plurality of mounting grooves (8), is equipped with the auxiliary compression wheel (9) in mounting groove (8), the auxiliary compression wheel (9) is rotatably connected in mounting groove (8) through pivot, and the auxiliary compression wheel (9) rolls and presses on the outer wall of clamping section (103).

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