CN216923205U - Plugging device for hydrostatic test and steam turbine high-pressure main valve with same - Google Patents
Plugging device for hydrostatic test and steam turbine high-pressure main valve with same Download PDFInfo
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- CN216923205U CN216923205U CN202122616883.7U CN202122616883U CN216923205U CN 216923205 U CN216923205 U CN 216923205U CN 202122616883 U CN202122616883 U CN 202122616883U CN 216923205 U CN216923205 U CN 216923205U
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- plugging device
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- pressure test
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- 230000002706 hydrostatic effect Effects 0.000 title description 9
- 238000007789 sealing Methods 0.000 claims abstract description 101
- 238000009434 installation Methods 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 210000004907 gland Anatomy 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000010248 power generation Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 239000007769 metal material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The utility model belongs to the field of power generation, and particularly relates to a plugging device for a hydraulic test and a steam turbine high-pressure main throttle valve with the plugging device, which comprise a valve rod, wherein one end of the valve rod is provided with a screw, the other end of the valve rod is provided with a main sealing valve head, the plugging device is arranged on a shell of the high-pressure main throttle valve when the steam turbine high-pressure main throttle valve is subjected to the hydraulic test, the main sealing valve head is in stop fit with a valve seat, a first sealing assembly can directly block a steam inlet and a steam outlet of the high-pressure main throttle valve to realize first-layer sealing, and meanwhile, a second sealing assembly and a third sealing assembly are arranged in an installation cavity channel of the valve rod and are used for sealing a first gate rod leakage and a second gate rod leakage in the installation cavity channel Is convenient for processing and manufacturing.
Description
Technical Field
The utility model belongs to the field of power generation, and particularly relates to a plugging device for a hydraulic pressure test and a high-pressure main throttle valve of a steam turbine with the plugging device.
Background
The steam turbine is a rotating machine which takes steam as power and converts the heat energy of the steam into mechanical work, is the most widely applied prime motor in the modern thermal power plant, and has the advantages of large single-machine power, high efficiency, long service life and the like. After steam from a boiler enters a steam turbine, the steam passes through a series of annularly arranged nozzles and movable blades in sequence, and heat energy of the steam is converted into mechanical energy for rotating a rotor of the steam turbine. The medium used in the working operation of the product is high-temperature high-pressure water, and the boiler hydraulic test is a key process of the product in processing, manufacturing and conventional overhauling based on the influence of the product quality and safety.
Patent document No. CN102865109B discloses a high-pressure main valve device for a steam turbine, which includes a main valve, a valve rod and a spring mechanism, wherein the valve rod is pneumatically controlled by the spring mechanism to control the opening and closing of the main valve. In the prior art, on the one hand, the valve core in the steam turbine high-pressure main throttle device is used under the normal operating condition of the steam turbine, in order to adapt to high-temperature steam, the valve core of the steam turbine high-pressure main throttle is made of hard high-temperature resistant material, when a hydraulic test is carried out, the 660WM supercritical unit part boiler main steam pipeline is designed without a blocking valve, in the hydraulic test process of the boiler superheated steam pipeline, the pressure needs to be directly pressed to the front of the high-pressure main throttle, the main throttle needs to be installed again in the past, the main throttle valve core blocks water from the hydraulic test, and the phenomenon of large leakage flow at the high-pressure main throttle is often caused.
The sealing performance is insufficient, and large leakage flow is easy to occur, so that the hydrostatic test is forced to stop.
On the other hand, in order to prevent steam leakage at the end of the high-pressure main valve shaft, a valve rod steam leakage pipeline is arranged at the high-pressure main valve of the steam turbine, and effective sealing is needed in the process of carrying out the hydrostatic test, so that the problem that high-pressure water from a boiler enters a cylinder and a steam turbine side system through the valve rod steam leakage pipeline, damage to repaired equipment is caused, and the influence on the hydrostatic test effect is avoided.
Therefore, it is necessary to develop a high-pressure main valve plugging valve suitable for a hydraulic test.
SUMMERY OF THE UTILITY MODEL
The utility model provides a plugging device for a hydraulic test and a high-pressure main throttle valve of a steam turbine with the plugging device, and aims to solve the problem of liquid leakage of the high-pressure main throttle valve in the hydraulic test process in the prior art.
The blocking device for the hydrostatic test adopts the following technical scheme:
the plugging device for the hydraulic test comprises a valve rod and is characterized in that a screw rod is arranged at one end of the valve rod, a main sealing valve head is arranged at the other end of the valve rod, a nut matched with the screw rod is fixedly arranged outside a high-pressure main valve, the screw rod is in threaded fit with the nut to further push the main sealing valve head to be in stop fit with a valve seat at a steam outlet of the high-pressure main valve, a first sealing assembly is arranged between the main sealing valve head and the valve seat, a second sealing assembly is arranged on the valve body, and a third sealing assembly is circumferentially arranged at one end, close to the valve rod, of the screw rod.
The first sealing assembly is a first sealing groove arranged on the main sealing valve head and a first sealing ring assembled in the first sealing groove.
The second sealing assembly is a second sealing groove arranged on the valve rod and positioned in the mounting cavity channel, and a second sealing ring assembled in the second sealing groove.
The third sealing assembly is a third sealing groove arranged on the screw rod and a third sealing ring assembled in the third sealing groove.
The plugging device for the hydrostatic test further comprises a gland, and the gland is provided with a central hole for the screw to penetrate through.
And a fourth sealing assembly is arranged between the screw rod and the gland.
The fourth sealing assembly is a fourth sealing groove arranged at the position of the central hole on the screw rod and a fourth sealing ring arranged in the fourth sealing groove.
The plugging device for the hydrostatic test further comprises a support frame, a flange is arranged on the support frame, and the flange is provided with a threaded hole which is in threaded fit with the screw rod so as to realize nut and screw transmission.
The first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring are all O-shaped rings.
The high-pressure main throttle valve of the steam turbine adopts the following technical scheme:
steam turbine high pressure main throttle, including casing and valve gap, the casing has steam inlet and steam outlet, the valve gap has along left right direction extension, is used for installing the installation chamber way of corresponding door pole, the inner wall that the installation chamber was said is equipped with along upper and lower direction extension, is used for the door pole of balanced steam to leak, two hourglass of door pole, its characterized in that, be equipped with plugging device in the installation chamber way, plugging device's technical scheme and the above-mentioned plugging device for the hydraulic test no longer give unnecessary details.
The utility model has the beneficial effects that:
the utility model provides a plugging device for a hydraulic test, which comprises a valve rod, wherein one end of the valve rod is provided with a screw, the other end of the valve rod is provided with a main sealing valve head, when the high-pressure main throttle of a steam turbine is subjected to the hydraulic test, the plugging device is installed on a shell of the high-pressure main throttle, the main sealing valve head is in blocking fit with a valve seat, a first sealing assembly can directly block a steam inlet and a steam outlet of the high-pressure main throttle, and a first layer of sealing is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of an embodiment of a high pressure main port of a steam turbine according to the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
reference numerals:
1. the valve comprises a shell, 11, a valve cover, 12, a first door rod leakage, 13, a second door rod leakage, 2, a screw rod, 21, a third sealing assembly, 22, a valve body upper sleeve, 3, a valve rod, 31, a second sealing assembly, 32, a guide sleeve, 4, a main sealing valve head, 41, a first sealing assembly, 42, a clamping block, 43, a valve rod sleeve, 5, a pressing cover, 51, a fourth sealing assembly, 6, a supporting frame, 7, a flange, 8, a transmission handle, B and a steam direction.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many different forms than those herein described and the skilled artisan may make similar modifications without departing from the spirit of the utility model and, therefore, the utility model is not limited by the embodiments of the substrate disclosed below.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 and 2, the embodiment of the high-pressure main throttle valve of the steam turbine according to the present invention includes a casing 1 and a valve cover 11, the casing 1 has a steam inlet and a steam outlet, the valve cover 11 has an installation cavity extending in the left-right direction for installing a corresponding gate rod, the inner wall of the installation cavity is provided with a first gate rod leak 12 and a second gate rod leak 13 extending in the up-down direction for balancing steam, and a plugging device for a hydraulic test is installed in the installation cavity. The valve core made of high-temperature-resistant metal materials is installed when the steam turbine normally works, the original valve core is detached when a hydraulic test is carried out, the plugging device for the hydraulic test provided by the utility model is installed and used for ensuring the sealing performance in the test process, and the valve core matched with the original valve core is replaced again after the test is finished, wherein the original valve core made of the high-temperature-resistant metal materials is a technology known by persons skilled in the art and is not described in detail.
The plugging device for the hydraulic test comprises a valve rod 3, a screw rod 2 is arranged at one end of the valve rod 3, a main sealing valve head 4 is arranged at the other end of the valve rod, a nut matched with the screw rod 2 is fixedly arranged outside a high-pressure main valve, the screw rod 2 is in threaded fit with the nut to further push the main sealing valve head 4 to be in stop fit with a valve seat at a steam outlet of the high-pressure main valve, a first sealing assembly 41 is arranged between the main sealing valve head 4 and the valve seat, a second sealing assembly 31 used for preventing liquid from leaking to a first gate rod leakage 12 is arranged on the valve rod 3, and a third sealing assembly 21 used for preventing liquid from leaking to a second gate rod leakage 13 is arranged on the circumferential direction of one end, close to the valve rod 3, of the screw rod 2. In order to further improve the sealing performance, the second seal assembly 31 and the third seal assembly 21 are two spaced apart sets.
The screw 2 in this embodiment has a threaded portion for fitting with a threaded hole on the flange 7 and a smooth portion for fitting the valve stem 3, specifically, one end of the smooth portion is provided with a fitting groove in which the valve stem 3 is coaxially fitted; the mounting cavity is also provided with a valve body upper sleeve 22 and a guide sleeve 32, in the embodiment, the valve body upper sleeve 22 is arranged on the smooth part of the screw rod 2 in a penetrating way, and the inner wall of the valve body upper sleeve is in sealing fit with the third sealing assembly 21; the guide sleeve 32 is arranged at one end of the mounting cavity close to the cavity of the valve body, and the inner wall of the guide sleeve is in sealing fit with the second sealing assembly 31 on the valve rod 3. In addition, a cavity is further arranged at the position of the second door rod leakage 13 in the installation cavity.
The first sealing assembly 41 is a first sealing groove arranged on the main sealing valve head 4 and a first sealing ring assembled in the first sealing groove; the second sealing component 31 is a second sealing groove arranged on the valve rod 3 at the position in the mounting cavity and a second sealing ring assembled in the sealing groove; the third seal assembly 21 is a third seal groove provided on the screw 2 at a position in the mounting cavity and a third seal ring fitted in the seal groove.
In order to further improve the sealing performance, the plugging device for the hydraulic test further comprises a gland 5 arranged on the valve cover 11 at one end of the mounting cavity, and the gland 5 is provided with a central hole for the screw rod 2 to penetrate through. In this embodiment, the gland 5 is T-shaped.
A fourth sealing assembly 51 for preventing liquid from leaking to the outside of the valve cover 11 is provided between the screw 2 and the gland 5. Specifically, the fourth seal assembly 51 is a fourth seal groove provided on the screw 2 at the center hole position and a fourth seal ring provided in the fourth seal groove.
The plugging device for the hydrostatic test further comprises a support frame 6 arranged outside the valve cover 11 at the circumferential position of the screw rod 2, a flange 7 is arranged on the support frame 6, and the flange 7 is provided with a threaded hole which is in threaded fit with the screw rod 2 so as to realize nut and screw rod transmission; for the convenience of operation, this device still is equipped with manual supercharging device, specifically is setting up transmission handle 8 on screw rod 2, realizes screw rod 2 transmission through rotatory handle, labour saving and time saving, the operation of being convenient for.
In this embodiment, first sealing washer, second sealing washer, third sealing washer, fourth sealing washer are O type circle, and O type circle is made simply, with low costs, and the function is reliable, the installation of being convenient for.
The embodiment of the plugging device for the hydraulic pressure test is the same as that of the plugging device for the hydraulic pressure test of the high-pressure main throttle valve of the steam turbine, and the details are not repeated.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The plugging device for the hydraulic test comprises a valve rod and is characterized in that a screw rod is arranged at one end of the valve rod, a main sealing valve head is arranged at the other end of the valve rod, a nut matched with the screw rod is fixedly arranged outside a high-pressure main valve, the screw rod is in threaded fit with the nut to further push the main sealing valve head to be in stop fit with a valve seat at a steam outlet of the high-pressure main valve, a first sealing assembly is arranged between the main sealing valve head and the valve seat, a second sealing assembly is arranged on the valve body, and a third sealing assembly is circumferentially arranged at one end, close to the valve rod, of the screw rod.
2. The plugging device for the hydraulic pressure test according to claim 1, wherein the first sealing component is a first sealing groove arranged on the main sealing valve head and a first sealing ring assembled in the first sealing groove.
3. The plugging device for the water pressure test as claimed in claim 2, wherein the second sealing component is a second sealing groove arranged on the valve rod and a second sealing ring assembled in the second sealing groove.
4. The plugging device for the water pressure test, according to claim 3, wherein the third sealing component is a third sealing groove arranged on the screw rod and a third sealing ring assembled in the third sealing groove.
5. The plugging device for the water pressure test is characterized in that the plugging device for the water pressure test further comprises a gland, and the gland is provided with a central hole for a screw to penetrate through.
6. The plugging device for the water pressure test according to claim 5, wherein a fourth sealing assembly is arranged between the screw and the gland.
7. The plugging device for the water pressure test according to claim 6, wherein the fourth sealing component is a fourth sealing groove arranged on the screw rod at the position of the central hole and a fourth sealing ring arranged in the fourth sealing groove.
8. The plugging device for the water pressure test is characterized in that the plugging device for the water pressure test further comprises a support frame, a flange is arranged on the support frame, and the flange is provided with a threaded hole which is in threaded fit with the screw rod so as to realize nut and screw transmission.
9. The plugging device for the water pressure test according to claim 6, wherein the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring are all O-shaped rings.
10. The high-pressure main throttle valve of the steam turbine comprises a shell and a valve cover, wherein the shell is provided with a steam inlet and a steam outlet, the valve cover is provided with an installation cavity channel which extends along the left-right direction and is used for installing a corresponding gate rod, the inner wall of the installation cavity channel is provided with a gate rod first leakage and a gate rod second leakage which extend along the up-down direction and are used for balancing steam, and the high-pressure main throttle valve is characterized in that a plugging device is assembled in the installation cavity channel and is the plugging device for the hydraulic pressure test as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122616883.7U CN216923205U (en) | 2021-10-29 | 2021-10-29 | Plugging device for hydrostatic test and steam turbine high-pressure main valve with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122616883.7U CN216923205U (en) | 2021-10-29 | 2021-10-29 | Plugging device for hydrostatic test and steam turbine high-pressure main valve with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216923205U true CN216923205U (en) | 2022-07-08 |
Family
ID=82248850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122616883.7U Expired - Fee Related CN216923205U (en) | 2021-10-29 | 2021-10-29 | Plugging device for hydrostatic test and steam turbine high-pressure main valve with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216923205U (en) |
-
2021
- 2021-10-29 CN CN202122616883.7U patent/CN216923205U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220708 |