CN215890108U - Temperature and pressure reducer structure convenient for replacing spray pipe - Google Patents
Temperature and pressure reducer structure convenient for replacing spray pipe Download PDFInfo
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- CN215890108U CN215890108U CN202121244724.2U CN202121244724U CN215890108U CN 215890108 U CN215890108 U CN 215890108U CN 202121244724 U CN202121244724 U CN 202121244724U CN 215890108 U CN215890108 U CN 215890108U
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Abstract
The utility model discloses a temperature and pressure reducer structure convenient for replacing a water spray pipe, which comprises a main steam pipeline, a front throttle orifice plate, a rear throttle orifice plate and a temperature reducing mechanism, wherein the front throttle orifice plate and the rear throttle orifice plate are sequentially arranged on the main steam pipeline from front to back along the flow direction of steam, the temperature reducing mechanism is arranged behind the rear throttle orifice plate and is communicated with the main steam pipeline, the temperature reducing mechanism comprises a temperature reducing water pipe, a water spray assembly and a low-pressure steam connecting pipe, the top end of the low-pressure steam connecting pipe is communicated with the temperature reducing water pipe, the bottom end of the low-pressure steam connecting pipe is communicated with the main steam pipeline, one end of the water spray assembly is communicated with the temperature reducing water pipe, and the other end of the water spray assembly is communicated with the main steam pipeline after penetrating through the low-pressure steam connecting pipe.
Description
Technical Field
The utility model relates to the field of structural improvement and optimization of a temperature reduction system in a steam seal temperature and pressure reducer of a steam turbine, in particular to a temperature and pressure reducer structure convenient for replacing a water spray pipe.
Background
The steam turbine is used for supplying sufficient low-temperature low-pressure steam (0.3 MPa) to the pressure equalizing box when the steam turbine is in a starting stage, and is used for sealing front and rear steam seals of the steam turbine and preventing air from entering the steam turbine, so that the vacuum degree can be rapidly improved, and the starting time is shortened.
The rear cylinder of the condensing steam turbine adopts a cast iron or welded structure, the applicable steam temperature is lower (200 ℃), and the rear bearing of the steam turbine is closer to the rear steam seal, so that the return oil and the tile temperature of the bearing are greatly influenced by the steam temperature at the rear steam seal. The steam that is used for sealed gland sealing when opening the machine comes from main steam pipeline, and the temperature and the pressure of this steam are higher, can play the effect of step-down through adding the orifice plate on the pipeline, but the temperature reduction of steam is but few, consequently need adopt water jet equipment, reduces steam temperature.
The turbine gland sealing temperature and pressure reducing device is mainly used for adjusting the temperature and pressure of steam and reducing the violent vibration and noise generated by high-speed and high-pressure steam. The water spraying pipe of the temperature reducing system is connected to the main steam pipeline, part of the water spraying pipe is positioned in the high-temperature steam which is subjected to pressure reduction, the temperature of the steam which is subjected to pressure reduction is far higher than the saturation temperature of the temperature reducing water, part of the temperature reducing water is vaporized in the pipe through heat transfer of the pipe wall of the water spraying pipe, the generated bubbles are compressed to be small due to the fact that general temperature reducing water has high pressure, but after the temperature reducing water is sprayed into the steam pipeline through the nozzle, the pressure of the steam is smaller than that of the temperature reducing water, the small bubbles expand in a very short time at the outlet of the nozzle, the released energy is large, and as a result of long-term operation, the nozzle part of the water spraying pipe is seriously abraded, and the atomization effect of the temperature reducing water is influenced. In summary, due to the structural characteristics of the water spraying pipe of the temperature reduction system, the temperature reduction effect is seriously affected for a long time, the cost is greatly increased, and therefore a more reasonable structure of the temperature and pressure reduction device is needed.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems encountered in the use process of the spray pipe of the temperature reduction system of the steam seal temperature and pressure reducer of the existing steam turbine, the utility model aims to provide the temperature and pressure reducer structure convenient for replacing the spray pipe.
The technical scheme adopted by the utility model to solve the technical problems is as follows: the utility model provides a temperature and pressure reducer structure convenient to change spray pipe, this temperature and pressure reducer include main steam pipeline, preceding orifice plate, back orifice plate and temperature reduction mechanism, preceding orifice plate, back orifice plate set gradually on main steam pipeline from the front to the back along the direction that steam flows, temperature reduction mechanism sets up the rear at back orifice plate, and temperature reduction mechanism is linked together with main steam pipeline.
Furthermore, the temperature reduction mechanism comprises a temperature reduction water pipe, a water spraying assembly and a low-pressure steam connecting pipe, the top end of the low-pressure steam connecting pipe is communicated with the temperature reduction water pipe, the bottom end of the low-pressure steam connecting pipe is communicated with the main steam pipeline, one end of the water spraying assembly is communicated with the temperature reduction water pipe, and the other end of the water spraying assembly is communicated with the main steam pipeline after penetrating through the low-pressure steam connecting pipe.
Furthermore, the bottom of temperature reduction water pipe is provided with flange I, and the top of low pressure steam connecting pipe is provided with flange II, and temperature reduction water pipe is connected with low pressure steam connecting pipe through flange I and flange II.
Further, the water spray assembly comprises a water spray pipe body and a sealing step, the top end of the water spray pipe body is communicated with the sealing step, the sealing step is arranged between the connecting flange I and the connecting flange II, and the bottom end of the water spray pipe body is arranged in the main steam pipeline after penetrating through the low-pressure steam connecting pipe.
Furthermore, the bottom end of the spray pipe is provided with a water spray hole.
Has the advantages that:
the utility model has the following beneficial effects:
1. reducing the high-pressure steam into low-pressure steam through the front and the rear throttle orifice plates;
2. a water spraying hole is processed at the front end of the water spraying pipe body, a step for sealing is processed at the rear end of the water spraying pipe body, the water spraying pipe assembly is inserted into a decompressed main steam pipeline during assembly, the sealing step is arranged between the connecting flange I and the connecting flange II, and sealing gaskets are placed on the upper surface and the lower surface of the sealing step to increase the sealing effect;
3. when the water spray quantity is not suitable or the water spray pipe is damaged, the water spray pipe assembly can be replaced by disassembling the connecting flange I and the connecting flange II.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the water spray assembly of the present invention;
the water spray device comprises a drawing mark 1, a front orifice plate, 2, a rear orifice plate, 3, a water spray assembly 301, a sealing step 302, a water spray pipe body 303, a water spray hole 4, a connecting flange I, a connecting flange 5 and a connecting flange II.
Detailed Description
The present invention will be described in further detail with reference to the drawings and specific examples, but the present invention is not limited thereto.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "lateral", "longitudinal", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
A temperature and pressure reducer structure convenient for replacing a water spray pipe body comprises a main steam pipeline, a front orifice plate 1, a rear orifice plate 2 and a temperature reducing mechanism, wherein the front orifice plate 1 and the rear orifice plate 2 are sequentially arranged on the main steam pipeline from front to back along the steam flowing direction, and high-pressure steam is reduced into low-pressure steam through the front orifice plate 1 and the rear orifice plate 2;
the temperature reducing mechanism is arranged behind the rear throttling orifice plate 2 and communicated with the main steam pipeline.
The temperature reduction mechanism comprises a temperature reduction water pipe, a water spraying assembly 3 and a low-pressure steam connecting pipe, wherein the temperature reduction water pipe is communicated with the temperature reduction water, the top end of the low-pressure steam connecting pipe is communicated with the temperature reduction water pipe, the bottom end of the low-pressure steam connecting pipe is communicated with a main steam pipeline, one end of the water spraying assembly 3 is communicated with the temperature reduction water pipe, and the other end of the water spraying assembly 3 is communicated with the main steam pipeline after penetrating through the low-pressure steam connecting pipe.
The bottom of temperature reduction water pipe is provided with flange I4, and the top of low pressure steam connecting pipe is provided with flange II 5, and temperature reduction water pipe is connected with low pressure steam connecting pipe through flange I4 and flange II 5.
The water spray component 3 comprises a water spray pipe body 302 and a sealing step 301, the top end of the water spray pipe body 302 is communicated with the sealing step 301, the sealing step 301 is arranged on the periphery of the top end of the water spray pipe body 302, the sealing step 301 is arranged between a connecting flange I4 and a connecting flange II 5, and the bottom end of the water spray pipe body 302 is arranged in a main steam pipeline after passing through a low-pressure steam connecting pipe. The bottom end of the spout body 302 is provided with a spout hole 303.
Processing out the hole for water spraying at the front end of spray pipe body 302, processing out the step that is used for sealing the rear end of spray pipe body 302, during the assembly insert spray pipe body 302 to the main steam pipe way after the decompression, sealed step 301 is through closing the bolt and adorning between flange I4 and flange II 5, places seal gasket on sealed step 301's two upper and lower faces to increase sealed effect.
The working process is as follows: high-pressure steam loops through behind the main steam pipeline behind the preceding orifice plate 1, the back orifice plate 2 and reduces high-pressure steam to low-pressure steam, and low-pressure steam will reduce temperature water to low-pressure steam through the hole for water spraying of spray pipe body 302 again and spray to low-pressure steam and cool down, when waiting that the water spray volume is improper or the spray pipe subassembly damages, can change the spray pipe subassembly through taking apart to close the bolt, provides convenience for the equipment maintenance.
The device of the present invention may have other forms than the above-described embodiments, and it should be understood that any simple modification, equivalent change and modification made to the above-described embodiments according to the technical spirit of the present invention fall within the scope of the present invention.
Claims (5)
1. The utility model provides a temperature and pressure reducer structure convenient to change spray pipe which characterized in that: this temperature and pressure reducer includes main steam conduit, preceding orifice plate, back orifice plate and desuperheating mechanism, preceding orifice plate, back orifice plate set gradually on main steam conduit from the front to the back along the direction that steam flows, the setting of desuperheating mechanism is at the rear of orifice plate, and desuperheating mechanism is linked together with main steam conduit.
2. A temperature and pressure reducer structure for facilitating replacement of a sprinkler pipe according to claim 1, wherein: the temperature reduction mechanism comprises a temperature reduction water pipe, a water spraying assembly and a low-pressure steam connecting pipe, the top end of the low-pressure steam connecting pipe is communicated with the temperature reduction water pipe, the bottom end of the low-pressure steam connecting pipe is communicated with a main steam pipeline, one end of the water spraying assembly is communicated with the temperature reduction water pipe, and the other end of the water spraying assembly is communicated with the main steam pipeline after penetrating through the low-pressure steam connecting pipe.
3. A temperature and pressure reducer structure for facilitating replacement of a sprinkler pipe according to claim 2, wherein: the bottom of temperature reduction water pipe is provided with flange I, and the top of low pressure steam connecting pipe is provided with flange II, and temperature reduction water pipe is connected with low pressure steam connecting pipe through flange I and flange II.
4. A temperature and pressure reducer structure for facilitating replacement of a sprinkler pipe according to claim 3, wherein: the water spraying assembly comprises a water spraying pipe body and a sealing step, the top end of the water spraying pipe body is communicated with the sealing step, the sealing step is arranged between the connecting flange I and the connecting flange II, and the bottom end of the water spraying pipe body is arranged in the main steam pipeline after penetrating through the low-pressure steam connecting pipe.
5. A temperature and pressure reducer structure for facilitating replacement of a sprinkler pipe according to claim 4, wherein: the bottom end of the spray pipe is provided with a spray hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121244724.2U CN215890108U (en) | 2021-06-04 | 2021-06-04 | Temperature and pressure reducer structure convenient for replacing spray pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121244724.2U CN215890108U (en) | 2021-06-04 | 2021-06-04 | Temperature and pressure reducer structure convenient for replacing spray pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215890108U true CN215890108U (en) | 2022-02-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121244724.2U Active CN215890108U (en) | 2021-06-04 | 2021-06-04 | Temperature and pressure reducer structure convenient for replacing spray pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215890108U (en) |
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2021
- 2021-06-04 CN CN202121244724.2U patent/CN215890108U/en active Active
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