CN210589058U

CN210589058U - Steam turbine disk seat mounting tool

Info

Publication number: CN210589058U
Application number: CN201921372966.2U
Authority: CN
Inventors: 马荣波; 何超; 孙波; 陈留涛; 姜宏诚; 胡律
Original assignee: China Chang Jiang Energy Group Corp
Current assignee: China Chang Jiang Energy Group Corp
Priority date: 2019-08-22
Filing date: 2019-08-22
Publication date: 2020-05-22
Anticipated expiration: 2029-08-22

Abstract

The utility model provides a steam turbine valve seat mounting tool, which at least comprises a handle, a screw rod, a pressing plate and a bottom plate, wherein the center of the bottom plate is provided with a threaded hole, the center of the pressing plate is correspondingly provided with a fixed through hole, one end of the screw rod passes through the fixed through hole and extends into the threaded hole, the surface of the screw rod extending into the threaded hole is provided with a first external thread which can be meshed with the internal thread of the threaded hole, the screw rod is connected with the bottom plate through the matching of the first external thread and the internal thread, the other end of the screw rod opposite to the bottom plate is welded on the lower surface of the handle, the utility model utilizes the manual screwing of a gland nut to lead the gland nut to rotate along the surface of the screw rod to downwards compress the pressing plate, thereby leading the steam turbine valve seat to be horizontally and fixedly mounted between the bottom plate and the pressing plate, ensuring that the, the installation efficiency is improved, and the working time is shortened.

Description

Steam turbine disk seat mounting tool

Technical Field

The utility model relates to a steam turbine disk seat installation field, concretely relates to steam turbine disk seat mounting tool.

Background

The steam turbine is a high-temperature, high-pressure and high-rotating-speed precision heavy machine which applies work through steam driving, the installation precision requirement of each part in the steam turbine is relatively high, the installation of each part directly influences the operation efficiency of the steam turbine, the installation of the valve seat in the front cylinder is mainly carried out in a liquid nitrogen cold jacket assembling mode, the valve seat is firstly placed in an ultralow-temperature environment to be contracted, and then placed in a cylinder chamber to be restored to the normal temperature to reach H7/u6(+0.085, +0.058) interference fit, and therefore the problem to be solved needs to be solved urgently for accurate installation of the valve seat in the front cylinder.

The existing valve seat installation mode is mainly completed manually by an operator, the valve seat is hooked by an iron wire and placed in liquid nitrogen for cooling and contraction, and the operator places the valve seat at the position of a cylinder chamber through protective gloves. This type of mounting has the following disadvantages: firstly, when the valve seat is installed by using an iron wire hook, the vertical accuracy of the installation is difficult to control, the accuracy of the relative position of the valve seat can be ensured only by adjusting the valve seat for many times by an operator, and when the valve seat is calibrated and installed, the valve seat is easy to incline and block the installation position due to the fact that the iron wire cannot support the valve seat, and the valve seat is required to be heated and deformed to be taken out again, so that the installation efficiency of the valve seat is extremely low; secondly, because a plurality of valve seats are arranged in one cylinder, the time consumption for installing the valve seats is long due to the low installation efficiency of a single valve seat, and the working strength of an operator is increased; thirdly, when an operator contacts the valve seat treated by liquid nitrogen at low temperature by wearing protective gloves, the operator is very easy to cause hand frostbite due to improper operation, and the operation danger is increased.

To foretell drawback, the utility model provides a turbine valve seat mounting tool is not enough in order to solve foretell technique effectively.

Disclosure of Invention

An object of the utility model is to overcome the not enough of above-mentioned technique, provide a steam turbine disk seat mounting tool, when aiming at solving the installation of current steam turbine disk seat, long when installation effectiveness consumes slowly, increase operator's working strength and fix a position the poor technical problem of installation precision.

In order to achieve the technical purpose, the utility model provides a mounting tool for a steam turbine valve seat, which at least comprises a handle, a screw rod, a pressure plate and a bottom plate, wherein the center of the bottom plate is provided with a threaded hole, a fixing through hole is correspondingly formed in the center of the pressure plate, one end of the screw rod penetrates through the fixing through hole and extends into the threaded hole, and the surface of the screw rod extending into the threaded hole is provided with a first external thread which can be meshed with the internal thread of the threaded hole, the screw rod is connected with the bottom plate through the matching of the first external thread and the internal thread, the other end of the screw rod, which is opposite to the bottom plate, is welded on the lower surface of the handle, a second external thread is arranged in the middle of the screw rod, a compression nut is arranged on the screw rod in a matching way through the second external thread, and the compression nut moves along the axial direction of the screw rod through the rotation matching with the second external thread.

Furthermore, two sides of the screw rod are symmetrically provided with connecting nuts, and one side end face of each connecting nut is fixedly connected to the upper surface of the bottom plate.

Further, the cover is equipped with the connection iron wire on the coupling nut, the one end of connecting the iron wire can be dismantled with coupling nut and be connected, and the other end then welds in on the handle.

Furthermore, the center line of the inner hole of the threaded hole is coincided with the center line of the inner hole of the fixed through hole. The utility model discloses compare in prior art following beneficial effect as follows: the utility model discloses an install the steam turbine disk seat on the bottom plate, recycle the screw rod and pass the fixed through-hole that the clamp plate center was seted up perpendicularly and extend to the screw hole screw-thread fit that is equipped with on the bottom plate for the bottom plate and realize the control of screw rod vertical installation positioning accuracy to improve the installation accuracy when the steam turbine disk seat is installed; meanwhile, the gland nut is screwed manually to rotate along the surface of the screw rod to press the pressure plate downwards, so that the steam turbine valve seat is horizontally and fixedly arranged between the bottom plate and the pressure plate, the steam turbine valve seat is guaranteed not to be inclined in the moving process to block a corresponding installation position, the installation efficiency is improved, the working time is shortened, and the labor intensity of an operator is reduced; and the operator moves through the handle to install the turbine valve seat, so that the phenomenon that the hands of the operator are frostbitten due to the fact that the operator directly contacts the turbine valve seat processed at low temperature is effectively avoided.

Drawings

The invention will be further explained with reference to the following figures and examples:

FIG. 1 is the installation schematic diagram of the positioning installation steam turbine valve seat of the present invention

FIG. 2 is the overall structure diagram of the present invention

FIG. 3 is a schematic structural diagram of the middle bottom plate of the present invention

FIG. 4 is a schematic structural view of the middle press plate of the present invention

FIG. 5 is a schematic view of the structure of the middle screw rod of the present invention

FIG. 6 is a schematic view of the structure of the middle arm of the present invention

In the figure: 1. the steam turbine valve seat comprises a handle, a screw rod 2, a pressure plate 3, a bottom plate 4, a threaded hole 5, a fixing through hole 6, a first external thread 7, a second external thread 8, a compression nut 9, a connecting nut 10, a connecting iron wire 11 and a steam turbine valve seat 12.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the above objects, the following detailed description of the embodiments, structures, features and effects of the present invention will be made with reference to the accompanying drawings and preferred embodiments, it should be understood that the embodiments described in the present invention are only used for explaining the present invention, and are not used for limiting the present invention.

Referring to fig. 1-6, the utility model provides a steam turbine valve seat mounting tool, at least comprising a handle 1, a screw rod 2, a pressing plate 3 and a bottom plate 4, the center of the bottom plate 4 is provided with a threaded hole 5, the center of the pressing plate 3 is correspondingly provided with a fixing through hole 6, one end of the screw rod 2 passes through the fixing through hole 6 and extends into the threaded hole 5, and the surface of the screw rod 2 extending into the threaded hole 5 is provided with a first external thread 7 capable of meshing with the internal thread of the threaded hole 5, the screw rod 2 is connected with the bottom plate 4 through the matching of the first external thread 7 and the internal thread, the other end of the screw rod 2 opposite to the bottom plate 4 is welded on the lower surface of the handle 1, the middle part of the screw rod 2 is also provided with a second external thread 8, the screw rod 2 is provided with a gland nut 9 through the matching of the second external thread 8, and the gland, according to the structure, when the steam turbine valve seat 12 is installed on the bottom plate 4, the screw rod 2 vertically penetrates through the fixing through hole 6 formed in the center of the pressing plate 3 relative to the bottom plate 4 and extends to the threaded hole 5 formed in the bottom plate 4 to be in threaded fit with the threaded hole, so that the vertical installation and positioning accuracy of the screw rod 2 is controlled, and the installation accuracy of the steam turbine valve seat 12 is improved; meanwhile, the gland nut 9 is manually screwed to rotate along the surface of the screw rod 2 to downwards compress the pressure plate 3, so that the steam turbine valve seat 12 is horizontally and fixedly installed between the bottom plate 4 and the pressure plate 3, the steam turbine valve seat 12 is guaranteed not to be inclined in the moving process to block a corresponding installation position, the installation efficiency is improved, the working time is shortened, and the labor intensity of an operator is reduced.

In a preferred embodiment, referring to fig. 1 and 2, connecting nuts 10 are symmetrically arranged on two sides of the screw rod 2, and one end surface of each connecting nut 10 is fixedly connected to the upper surface of the bottom plate 4; in order to make things convenient for and withdraw from bottom plate 4 after the accurate location installation of steam turbine disk seat 12, then the cover is equipped with connection iron wire 11 on coupling nut 10 this moment, the one end and the coupling nut 10 of connecting iron wire 11 can be dismantled and be connected, and the other end then welds in on handle 1, know by above-mentioned structure, after the installation of steam turbine disk seat 12 location is accomplished, drop and impaired when preventing bottom plate 4 to take out, upwards remove through utilizing screw rod 2 to back out bottom plate 4, and then make handle 1 upwards lift, drive and connect iron wire and upwards carry out-draw coupling nut 10, and then handle 4 pulls of bottom plate.

In a preferred embodiment, referring to fig. 3 and 4, the center line of the inner hole of the threaded hole 5 coincides with the center line of the inner hole of the fixing through hole 6. According to the structure, the inner hole center line of the threaded hole 5 coincides with the inner hole center line of the fixing through hole 6 of the pressing plate 3, so that the screw rod 2 penetrates through the fixing through hole 6, extends to pick the threaded hole 5 and is in threaded connection with the threaded hole 5, the accurate verticality requirement of the screw rod 2 is guaranteed, and therefore the parallelism and verticality installation requirements of the steam turbine valve seat 12 are met at the bottom plate 4 when the steam turbine valve seat 12 is installed, the installation precision of the steam turbine valve seat 12 is improved, the phenomenon that a large amount of time is wasted when an operator adjusts the steam turbine valve seat 12 for multiple times to accurately install the steam turbine valve seat is avoided, the work efficiency of installing the steam turbine valve seat 12 by the operator is indirectly improved, and the labor.

The operation process comprises the following steps:

when the steam turbine valve seat 12 is installed, firstly, one end of the screw rod 2 penetrates through the fixing through hole 6 and extends into the threaded hole 5 formed in the bottom plate 4, and the first external thread 7 formed in the surface of the screw rod 2 is matched with the threaded hole 5, so that the screw rod 2 is connected with the bottom plate 4; then, a steam turbine valve seat 12 to be installed is supported on the bottom plate 4, the compression nut 9 is matched with a second external thread 8 arranged on the outer surface of the middle part of the screw rod 2, and the fastening bolt is manually screwed, so that the fastening bolt rotates and moves towards the direction close to the pressure plate 3 along the axial direction of the screw rod 2, the pressure plate 3 is further compressed, and the steam turbine valve seat 12 is positioned and clamped, therefore, the positioning precision of the steam turbine valve seat 12 is improved, the working time is shortened, and the labor intensity of an operator is reduced;

simultaneously, after the installation of steam turbine disk seat 12, through manual rotation handle 1 this moment for screw rod 2 is rotatory to be slided out screw hole 5 of bottom plate 4, breaks away from out bottom plate 4, and utilizes connecting iron wire to carry simultaneously and draws and fix the coupling nut 10 on bottom plate 4, breaks away from out bottom plate 4 together with this, and the effectual danger that has avoided the operator to touch the steam turbine disk seat 12 of low-temperature treatment and cause the frostbite takes place.

The utility model provides a steam turbine valve seat mounting tool, which mounts a steam turbine valve seat 12 on a bottom plate 4, recycles a screw rod 2 to vertically pass through a fixing through hole 6 arranged at the center of a pressing plate 3 relative to the bottom plate 4 and extend to a threaded hole 5 arranged on the bottom plate 4 for screw thread fit to realize the control of the vertical mounting and positioning precision of the screw rod 2, so as to improve the mounting precision of the steam turbine valve seat 12 during mounting; meanwhile, the gland nut 9 is manually screwed to rotate along the surface of the screw rod 2 to downwards compress the pressure plate 3, so that the turbine valve seat 12 is horizontally and fixedly arranged between the bottom plate 4 and the pressure plate 3, the corresponding installation position is prevented from being blocked due to deflection of the turbine valve seat 12 in the moving process, the installation efficiency is improved, the working time is shortened, and the labor intensity of an operator is reduced; and the operator moves through the handle 1 to install the turbine valve seat 12, so that the phenomenon that the hands of the operator are frostbitten due to the fact that the operator directly contacts the turbine valve seat 12 processed at low temperature is effectively avoided.

The above-mentioned embodiments are merely preferred embodiments of the present invention, and should not be considered as limitations of the present invention, and the protection scope of the present invention should be defined by the technical solutions described in the claims, and includes equivalent alternatives of technical features in the technical solutions described in the claims. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.

Claims

1. A steam turbine valve seat mounting tool is characterized by at least comprising a handle (1), a screw (2), a pressing plate (3) and a bottom plate (4), wherein a threaded hole (5) is formed in the center of the bottom plate (4), a fixing through hole (6) is correspondingly formed in the center of the pressing plate (3), one end of the screw (2) penetrates through the fixing through hole (6) and extends into the threaded hole (5), a first external thread (7) capable of being meshed with an internal thread of the threaded hole (5) is arranged on the surface of the screw (2) extending into the threaded hole (5), the screw (2) is connected with the bottom plate (4) through the matching of the first external thread (7) and the internal thread, the other end of the screw (2) opposite to the bottom plate (4) is welded on the lower surface of the handle (1), a second external thread (8) is further arranged in the middle of the screw (2), and the screw rod (2) is provided with a compression nut (9) through the matching of a second external thread (8), and the compression nut (9) moves along the axis direction of the screw rod (2) through the rotating matching of the second external thread (8).

2. The mounting tool for the valve seat of the steam turbine according to claim 1, wherein the screw rod (2) is symmetrically provided with connecting nuts (10) at two sides, and one side end surface of each connecting nut (10) is fixedly connected to the upper surface of the base plate (4).

3. The steam turbine valve seat mounting tool according to claim 2, wherein the connecting nut (10) is sleeved with a connecting wire (11), one end of the connecting wire (11) is detachably connected with the connecting nut (10), and the other end of the connecting wire is welded on the handle (1).

4. A turbine valve seat installation tool according to claim 1, characterized in that the centre line of the bore of the threaded bore (5) coincides with the centre line of the bore of the fixing through bore (6).