Turbine high-pressure regulating valve conical bushing mounting tool

Abstract

The utility model relates to the technical field of bushing installation, in particular to a conical bushing installation tool for a high-pressure regulating valve of a steam turbine, which comprises a screw rod, a positioning ring screwed on the screw rod and an abutting seat, and a radial supporting structure is arranged on the abutting seat. During use, the positioning ring is taken down, the abutting seat is sleeved with the conical bushing, one end of the screw penetrates through the conical bushing mounting hole from the large-opening end of the conical bushing mounting hole, then the positioning ring is screwed until one end of the positioning ring abuts against the conical bushing mounting hole, the conical bushing is positioned, and at the moment, the screw is driven by an external pneumatic drill to rotate, so that the conical bushing is positioned. In the process that the threaded rod rotates to drive the abutting seat to drive the conical lining to move and abut against the conical lining installation hole, the radial supporting structure supports the conical lining in the radial direction, and the conditions that the conical lining cracks and is not installed in place are prevented; according to the utility model, the conditions that the conical bushing cracks and is not installed in place due to the influence of radial force during installation can be avoided, and the normal use of the valve rod is ensured.

Description

Technical Field

[0001] This utility model relates to the field of bushing installation technology, specifically to a tool for installing conical bushings of high-pressure regulating valves for steam turbines. Background Technology

[0002] The valve stem and operating mechanism of the 350MW steam turbine high-pressure regulating valve are connected by a crosshead. Originally, this was a threaded connection, secured with an anti-rotation pin. However, due to installation and other factors, the anti-rotation pin was impacted and sheared under the lifting force during valve opening and closing, peak shaving, and steam force, causing the valve stem and crosshead to detach, rendering the valve inoperable. To prevent the valve stem and crosshead from detaching, the improved 350MW steam turbine high-pressure regulating valve has a tapered section at the upper end of the valve stem, which works in conjunction with a tapered bushing and the tapered bushing mounting hole on the crosshead. However, when installing the tapered bushing into the mounting hole, ordinary hammering installation is prone to radial force on the bushing, resulting in cracks or improper installation, affecting the normal use of the valve stem. Utility Model Content

[0003] The purpose of this utility model is to address the above-mentioned shortcomings by providing an installation tool for the conical bushing of a high-pressure regulating valve for steam turbines. This tool can prevent the conical bushing from cracking or being improperly installed due to radial force during installation, thus ensuring the normal operation of the valve stem.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A tool for installing a conical bushing of a high-pressure regulating valve for a steam turbine includes a screw, a positioning ring screwed onto the screw, and an abutment seat, wherein the abutment seat is provided with a radial support structure.

[0006] Furthermore, the radial support structure includes a collar sleeved on the screw, multiple telescopic rods for connecting the collar and the abutment seat, a spring sleeved on the telescopic rods, the beginning and end of the spring being connected to the collar and the abutment seat respectively, multiple radial grooves being formed on the collar, a slider being slidably connected in the grooves, a telescopic rod connecting the slider being provided at one end of the groove, a spring being sleeved on the telescopic rod, the beginning and end of the spring being connected to the groove and the slider respectively, a connecting rod being provided on the slider, a U-shaped seat being fixed at the end of the connecting rod, the vertical part of the U-shaped seat being rotatably connected via a rotating shaft, a radially C-shaped abutment block being fixed on the rotating shaft, and the vertical part of the radially C-shaped abutment block being rotatably connected to the rotating shaft.

[0007] Furthermore, the abutment seat includes a conical abutment block, an abutment ring fixed to the large end of the conical abutment block, one end of the telescopic rod being connected to the abutment ring, and the conical abutment block and the abutment ring being provided with through internal threaded holes, the internal threaded holes being used for screwing a screw rod.

[0008] Furthermore, the outer diameter of the abutment ring is greater than the maximum outer diameter of the conical abutment block.

[0009] Furthermore, a connector is provided at one end of the screw.

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

[0011] In practical applications, the positioning ring is first removed, and the tapered bushing is placed on the abutment seat. One end of the screw passes through the larger end of the tapered bushing mounting hole, and then the positioning ring is screwed on until one end of the positioning ring abuts into the tapered bushing mounting hole, thus positioning the tapered bushing. At this point, an external air drill is used to drive the screw to rotate. The screw rotation drives the abutment seat, moving the tapered bushing into the mounting hole. During this process, the radial support structure provides radial support to the tapered bushing, preventing cracks and improper installation. This invention avoids cracks and improper installation of the tapered bushing due to radial force during installation, ensuring the valve stem can be used normally. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is the front view of this utility model;

[0014] Figure 3 yes Figure 2 Sectional view at point AA;

[0015] Figure 4 This is a magnified view of section B in diagram 3;

[0016] Reference numerals: Screw 1; Connector 11; Positioning ring 2; Abutment seat 3; Conical clamping block 31; Abutment ring 32; Collar 41; Slide groove 411; Telescopic rod one 42; Spring one 43; Slider 44; Telescopic rod two 45; Spring two 46; Connecting rod 47; U-shaped seat 48; Rotating shaft 49; Radial U-shaped clamping block 410; Conical bushing 5. Detailed Implementation

[0017] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the installation tool for the conical bushing of the high-pressure regulating valve of the steam turbine includes a screw 1, a positioning ring 2 screwed onto the screw 1, and an abutment seat 3, wherein the abutment seat 3 is provided with a radial support structure.

[0018] In use, first remove the positioning ring 2, then put the tapered bushing 5 onto the abutment seat 3. Pass one end of the screw 1 through the large end of the tapered bushing mounting hole, and then screw the positioning ring 2 on until one end of the positioning ring 2 abuts into the tapered bushing mounting hole, thus positioning the tapered bushing 5. At this time, use an external air drill to drive the screw 1 to rotate. The rotation of the screw 1 drives the abutment seat 3, moving the tapered bushing 5 into the tapered bushing mounting hole. During this process, the radial support structure provides radial support for the tapered bushing 5, preventing cracks and improper installation. This invention avoids cracks and improper installation of the tapered bushing 5 due to radial force during installation, ensuring the valve stem can be used normally.

[0019] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the radial support structure includes a collar 41 sleeved on the screw 1, multiple telescopic rods 42 used to connect the collar 41 and the abutment seat 3, and a spring 43 sleeved on the telescopic rods 42. The beginning and end of the spring 43 are respectively connected to the collar 41 and the abutment seat 3. The collar 41 has multiple radially opened grooves 411. A slider 44 is slidably connected in the grooves 411. One end of the groove 411 is provided with a telescopic rod 45 connecting the slider 44. A spring 46 is sleeved on the telescopic rod 45. The beginning and end of the spring 46 are respectively connected to the groove 411 and the slider 44. A connecting rod 47 is provided on the slider 44. A U-shaped seat 48 is fixed to the end of the connecting rod 47. The vertical part of the U-shaped seat 48 is rotatably connected by a rotating shaft 49. A radial U-shaped clamping block 410 is fixed on the rotating shaft 49. The vertical portion of the U-shaped abutment block 410 is rotatably connected to the rotating shaft 49. In this embodiment, when the conical bushing 5 is fitted onto the abutment seat 3, the transverse end of the radial U-shaped abutment block 410 abuts against the outer side wall of the conical bushing 5, and the second spring 46 and the second telescopic rod 45 are stretched. During the process of the screw 1 rotating to drive the abutment seat 3 to move the conical bushing 5 into the conical bushing mounting hole, the first spring 43 and the first telescopic rod 42 are stretched, and the second spring 46 and the telescopic rod 45 are stretched. As the second rod 45 continues to be stretched, the transverse end of the radially shaped clamping block 410 abuts against the outer wall of the tapered bushing 5, preventing radial cracks from forming in the tapered bushing 5. When the tapered bushing 5 is fully inserted into the tapered bushing mounting hole, the second telescopic rod 45 resets under the restoring force of the second spring 46. At this time, the positioning ring 2 is removed again, and as the screw 1 gradually withdraws from the tapered bushing mounting hole, the second telescopic rod 45 resets under the restoring force of the first spring 43.

[0020] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the abutment seat 3 includes a conical abutment block 31 and an abutment ring 32 fixed to the large end of the conical abutment block 31. One end of the telescopic rod 42 is connected to the abutment ring 32. The conical abutment block 31 and the abutment ring 32 are provided with through internal threaded holes, which are used to screw the screw rod 1. In this embodiment, the conical bushing 5 is sleeved on the conical abutment block 31. When the screw rod 1 rotates and drives the abutment seat 3 to rotate, the conical bushing 5 is abutted into the conical bushing mounting hole through the abutment ring 32.

[0021] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the outer diameter of the abutment ring 32 is larger than the maximum outer diameter of the conical abutment block 31; in this embodiment, the abutment ring 32 can only abut against the end of the conical bushing 5 when the outer diameter of the abutment ring 32 is larger than the maximum outer diameter of the conical abutment block 31.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a connector 11 is provided at one end of the screw 1; in this embodiment, the connector 11 makes it easier for the screw 1 to be clamped by the air drill.

[0023] The specific embodiments described herein are merely illustrative examples of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the scope defined by this utility model.

Claims

1. A tool for installing a conical bushing of a high-pressure regulating valve for a steam turbine, characterized in that: It includes a screw (1), a positioning ring (2) screwed onto the screw (1), and an abutment seat (3), wherein the abutment seat (3) is provided with a radial support structure; The radial support structure includes a collar (41) sleeved on the screw (1), multiple telescopic rods (42) used to connect the collar (41) and the abutment (3), and a spring (43) sleeved on the telescopic rods (42). The beginning and end of the spring (43) are respectively connected to the collar (41) and the abutment (3). The collar (41) has multiple radially opened grooves (411). A slider (44) is slidably connected in the groove (411). One end of the groove (411) is provided with a telescopic rod connecting the slider (44). Second (45), a second spring (46) is sleeved on the second telescopic rod (45). The beginning and end of the second spring (46) are respectively connected to the slide groove (411) and the slider (44). A connecting rod (47) is provided on the slider (44). A U-shaped seat (48) is fixed at the end of the connecting rod (47). The vertical part of the U-shaped seat (48) is rotatably connected through a rotating shaft (49). A radially shaped clamping block (410) is fixed on the rotating shaft (49). The vertical part of the radially shaped clamping block (410) is rotatably connected to the rotating shaft (49).

2. The turbine high-pressure regulating valve conical bushing installation tool according to claim 1, characterized in that, The abutment seat (3) includes a conical abutment block (31) and an abutment ring (32) fixed to the large end of the conical abutment block (31). One end of the telescopic rod (42) is connected to the abutment ring (32). The conical abutment block (31) and the abutment ring (32) are provided with through internal threaded holes, which are used to screw the screw rod (1).

3. The turbine high-pressure regulating valve conical bushing installation tool according to claim 2, characterized in that, The outer diameter of the abutting ring (32) is greater than the maximum outer diameter of the conical abutting block (31).

4. The turbine high-pressure regulating valve conical bushing installation tool according to claim 1, characterized in that, One end of the screw (1) is provided with a connector (11).

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