CN218001177U - Temperature and pressure reducer and steam turbine system - Google Patents
Temperature and pressure reducer and steam turbine system Download PDFInfo
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- CN218001177U CN218001177U CN202222524663.6U CN202222524663U CN218001177U CN 218001177 U CN218001177 U CN 218001177U CN 202222524663 U CN202222524663 U CN 202222524663U CN 218001177 U CN218001177 U CN 218001177U
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Abstract
The utility model discloses a temperature and pressure reducer and steam turbine system. Comprises a pressure reducing valve, a front steam pipeline, a middle steam pipeline and a rear steam pipeline; the temperature-reducing water pipeline and the safety valve are respectively connected with the middle steam pipeline; the pressure reducing valve is connected with a pressure reducing valve actuating mechanism; a desuperheating water regulating valve is arranged in the desuperheating water pipeline and connected with a desuperheating valve executing mechanism; the back steam pipeline is connected with a pressure transmitter and a temperature detection element, the pressure transmitter and the temperature detection element are connected to a DCS (distributed control system) regulator, and the DCS regulator is in control connection with the pressure reducing valve executing mechanism and the temperature reducing valve executing mechanism; the outlet of the pressure reducing valve is connected with a pressure reducing mixing device. The utility model can adjust the steam volume and the desuperheating water volume in real time according to the feedback information, is convenient to regulate and control, and ensures that the steam can be quickly cooled and depressurized to a preset state effect; the outlet adopts the water spray atomization device to spray into the decompression mixing device, so that the mixing efficiency is improved, and the stable cooling and decompression of the steam are realized.
Description
Technical Field
The utility model relates to a temperature and pressure reduction equipment technical field, concretely relates to temperature and pressure reduction ware and steam turbine system.
Background
The temperature and pressure reducing device is widely applied to enterprises of cogeneration, central heating and steam supply. The steam heat energy (temperature and pressure) conversion device and the energy-saving equipment utilizing the waste heat are commonly used in the heat energy engineering. The device reduces the steam temperature and the steam pressure to the steam temperature and the steam pressure required by a user so as to meet the process requirement of the user.
The Chinese patent discloses a temperature and pressure reducing device with a pressure reducing valve (CN 216844160U), which comprises a temperature and pressure reducing device body and a new water pressure conduit fixedly arranged at the left end of the temperature and pressure reducing device body; a secondary water pressure guide pipe is transversely preset at the right end of the temperature and pressure reducing device body, and locking connecting flanges are fixedly arranged at the left end of the secondary water pressure guide pipe and the right end of the new water pressure guide pipe through bolts; further comprising: the left side of the top surface of the new water pressure guide pipe is connected with the bottom end of the new water pressure temperature instrument in a penetrating way; wherein, the right side of the top surface of the secondary water pressure conduit is connected with the bottom end of the secondary water pressure instrument in a penetrating way; wherein, the top surface middle part through connection of secondary water pressure pipe is in safety control valve's bottom, and safety control valve's top through connection is in the bottom of unloading pipe. This temperature and pressure reducer with relief pressure valve detects water pressure through temperature and pressure for the first time, later detects once more after decompressing through the relief pressure valve body, the subsequent use of being convenient for.
The prior art has the following defects:
1. the new water pressure guide pipe is connected to the left end of the secondary water pressure guide pipe, and the amount of temperature reduction water provided by the new water pressure guide pipe is not easy to control and cannot form stable and adjustable matching with a pressure reducing valve in front;
2. the new water pressure pipe is connected with the secondary water pressure pipe in a single channel, and the steam mixing effect of the desuperheating water and the steam after the first depressurization is difficult to guarantee.
SUMMERY OF THE UTILITY MODEL
The technique that exists to the aforesaid is not enough, the utility model provides a temperature and pressure reducer and steam turbine system.
The utility model adopts the following technical scheme: a temperature and pressure reducer comprises a pressure reducing valve, wherein an inlet of the pressure reducing valve is connected with a front steam pipeline, an outlet of the pressure reducing valve is connected with the front end of a middle steam pipeline, and the rear end of the middle steam pipeline is connected with a rear steam pipeline; the temperature-reducing water pipeline and the safety valve are respectively connected with the middle steam pipeline;
the pressure reducing valve is connected with a pressure reducing valve actuating mechanism used for controlling the action of the pressure reducing valve; a desuperheating water regulating valve is installed in the desuperheating water pipeline and connected with a desuperheating valve executing mechanism for controlling the action of the desuperheating water regulating valve; the rear steam pipeline is connected with a pressure transmitter and a temperature detection element, the pressure transmitter and the temperature detection element are connected to a DCS (distributed control system) regulator, and the DCS regulator is in control connection with the pressure reducing valve executing mechanism and the temperature reducing valve executing mechanism;
the outlet of the pressure reducing valve is connected with a pressure reducing mixing device, and the front end of the medium steam pipeline is sleeved at the rear part of the pressure reducing mixing device; the water spraying and atomizing device is installed at the connecting end of the temperature reduction water pipeline and the middle steam pipeline and extends into the pressure reduction mixing device in the middle steam pipeline.
It further comprises the following steps: the pressure reducing and mixing device comprises a transition joint, the front end of the transition joint is connected with an outlet of the pressure reducing valve, the rear end of the transition joint is fixedly connected with a mixing liner pipe, and a throttling orifice plate is arranged in the mixing liner pipe; the medium steam pipeline is sleeved outside the mixing liner pipe, the front end of the medium steam pipeline is fixedly connected with the rear end of the transition joint, and the water spraying and atomizing device extends into the mixing liner pipe.
A first manual stop valve and a desuperheating water filter screen are arranged in the desuperheating water pipeline in the water inlet direction of the desuperheating water regulating valve, and a second manual stop valve and a check valve are arranged in the desuperheating water pipeline in the water outlet direction of the desuperheating water regulating valve; the connecting end of the desuperheating water pipeline and the middle steam pipeline is divided into two symmetrical desuperheating water pipeline shunt pipes, and the desuperheating water pipeline shunt pipes are symmetrically connected to two sides of the middle steam pipeline.
The pressure reducing valve comprises a valve body, a valve seat and a valve core matched with the valve seat are installed in a valve hole of the valve body, and the valve core is connected with a valve core rod; the outer end of a valve hole of the valve body is fixedly connected with a valve cover, and the valve core rod penetrates through the valve cover to be connected with the pressure reducing valve actuating mechanism; a sleeve is further mounted in a valve hole of the valve body and abuts between the valve seat and the valve cover; the valve core is arranged in the sleeve in a sliding fit mode, and the sleeve is provided with a through flow hole matched with the valve core.
And a thermometer is arranged on the rear steam pipeline.
A pressure gauge is arranged on the rear steam pipeline through a pressure gauge bent pipe assembly; the pressure gauge primary door is installed on the pressure gauge bent pipe assembly.
The middle steam pipeline is supported on a fixed support; the front steam pipeline and the rear steam pipeline are respectively supported on the sliding support.
A steam turbine system comprises a main steam main pipe for supplying air to a steam turbine, and a medium-pressure main pipe and a low-pressure main pipe for supplying air to a user; the boiler is connected to the main steam main pipe; the steam turbine extracts steam to the medium-pressure main pipe, and the steam turbine exhausts the steam to the low-pressure main pipe; a temperature and pressure reducing device is connected between the main steam main pipe and the medium pressure main pipe, and another temperature and pressure reducing device is connected between the medium pressure main pipe and the low pressure main pipe.
The beneficial effects of the utility model reside in that:
(1) The pressure reducing valve, the temperature reducing water regulating valve, the pressure transmitter and the temperature detecting element are cooperatively used, so that the steam quantity and the temperature reducing water quantity can be regulated in real time according to feedback information, the regulation and the control are convenient, and the steam can be rapidly cooled and reduced to a preset state effect;
(2) The temperature-reducing water pipeline adopts a symmetrical branch design, and a water spraying and atomizing device is adopted at an outlet to spray into the pressure-reducing mixing device to be fully mixed with the steam after pressure reduction in the pressure-reducing mixing device, so that the mixing efficiency is improved, and the stable temperature reduction and pressure reduction of the steam are realized;
(3) The pressure reducing valve only completes the pressure reducing function, and a sleeve type structure is adopted, so that vibration and squeaking generated in throttling can be avoided.
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, 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 the temperature and pressure reducer of the present invention;
FIG. 2 is a cross-sectional view of the pressure reducing and mixing device of the temperature and pressure reducer of the present invention;
FIG. 3 is a schematic view showing the arrangement of the temperature-reducing water pipe shunt tubes in the temperature and pressure reducer of the present invention;
FIG. 4 is a sectional view of a pressure reducing valve of the temperature and pressure reducer of the present invention;
fig. 5 is a schematic view of the gas circuit connection of the steam turbine system of the present invention.
In the figure: 1. a pressure reducing valve; 1-1, a valve body; 1-2, valve seats; 1-3, sleeve; 1-4, valve core; 1-5, valve core rod; 1-6, valve cover; 2. a pressure reducing valve actuator; 3. a reduced pressure mixing device; 4. a transition joint; 5. a restriction orifice plate; 6. mixing the liner tube; 7. a medium steam pipeline; 8. a flange III; 9. a bolt III; 10. a nut III; 11. a flange winding pad III; 12. a flange IV; 13. a bolt IV; 14. a nut IV; 15. a flange winding pad IV; 16. a safety valve; 17. a pressure gauge; 18. a pressure gauge elbow component; 19. a primary door of the pressure gauge; 20. a thermometer; 21. a pressure transmitter; 22. a temperature detection element; 23. a water spray atomization device; 24. a flange winding pad II; 25. a nut II; 26. a bolt II; 27. a temperature-reducing water pipeline tee joint; 28. a pipeline flange I; 29. a companion flange I; 30. a bolt I; 31. a nut I; 32. a flange winding pad I; 33. a temperature-reducing water pipe elbow; 34. a manual stop valve; 35. a temperature-reducing water filter screen; 36. a desuperheating water regulating valve; 37. a desuperheating valve actuator; 38. a check valve; 39. a temperature-reducing water pipeline; 39-1, a temperature-reducing water pipeline shunt pipe; 40. a front steam line; 41. a rear steam line; 42. a second manual shutoff valve; 43. fixing and supporting; 44. sliding support; 45. a main steam main pipe; 46. medium pressure mother pipe; 47. a low-pressure main pipe; 48. a boiler; 49. a steam turbine; 50. a temperature and pressure reducing device.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example one
Referring to fig. 1, a temperature and pressure reducing device is provided, which comprises a front steam pipeline 40, a pressure reducing valve 1, a pressure reducing mixing device 3, a middle steam pipeline 7 and a rear steam pipeline 41 arranged in sequence from front to back, wherein the pressure reducing valve 1 is connected with a pressure reducing valve actuating mechanism 2 for controlling the pressure reducing valve 1 to act. The middle steam duct 7 is supported on a fixed support 43, and the front and rear steam ducts 40 and 41 are supported on a sliding support 44, respectively. The desuperheating water pipeline 39 and the safety valve 16 are respectively connected to the medium steam pipeline 7, a desuperheating water regulating valve 36 is installed in the desuperheating water pipeline 39, and the desuperheating water regulating valve 36 is connected with a desuperheating valve executing mechanism 37 for controlling the action of the desuperheating water regulating valve 36. The rear steam pipe 41 is provided with a pressure gauge 17, a thermometer 20, a pressure transmitter 21 and a temperature detection element 22 in sequence from front to back. The pressure transmitter 21 and the temperature detection element 22 are connected to a DCS regulator which controls the connection of the pressure reducing valve actuator 2 and the temperature reducing valve actuator 37.
With reference to fig. 1 and 2, the pressure reducing and mixing device 3 includes a transition joint 4, the front end of the transition joint 4 is connected with the outlet of the pressure reducing valve 1 by welding, and the rear end of the transition joint 4 is fixedly connected with a mixing liner tube 6. An orifice plate 5 is arranged in the mixing liner 6, and the orifice plate 5 is radial. The middle steam pipeline 7 is sleeved outside the mixed liner pipe 6, and the front end of the middle steam pipeline 7 is connected with the rear end of the transition joint 4 in a welding mode.
Referring to fig. 1 and 3, a first manual stop valve 34 and a desuperheating water filter 35 are installed in the desuperheating water pipe 39 in the water inlet direction of the desuperheating water regulating valve 36, and a second manual stop valve 42 and a check valve 38 are installed in the desuperheating water pipe 39 in the water outlet direction of the desuperheating water regulating valve 36. One end of the temperature-reducing water pipeline 39 close to the middle steam pipeline 7 is divided into two symmetrical temperature-reducing water pipeline shunt pipes 39-1 through a temperature-reducing water pipeline tee joint 27 and a temperature-reducing water pipeline elbow 33. The temperature-reducing water pipeline shunt pipes 39-1 are arranged into a plurality of sections according to requirements, and the adjacent sections of the temperature-reducing water pipeline shunt pipes 39-1 are butted and fixed through a pipeline flange I28, a mating flange I29, a bolt I30, a nut I31 and a flange winding pad I32. The water spray atomization device 23 is arranged at the end 39-1 of the temperature-reducing water pipeline shunt pipe, and the water spray atomization device 23 can adopt a swirl core nozzle. The water spraying and atomizing device 23 is fixedly connected with the steam pipeline 7 in the bolt II 26, the nut II 25 and the flange winding cushion II 24. The water spray atomizer 23 extends through the steam line 7 into the mixing liner 6 of the mixing device 3.
Referring to fig. 1 and 4, the pressure reducing valve 1 includes a valve body 1-1, a valve seat 1-2 and a valve core 1-4 matched with the valve seat 1-2 are installed in a valve hole of the valve body 1-1, and the valve core 1-4 is connected with a valve core rod 1-5. The outer end of the valve hole of the valve body 1-1 is fixedly connected with a valve cover 1-6, and a valve core rod 1-5 penetrates through the valve cover 1-6 to be connected with a pressure reducing valve actuating mechanism 2. In the embodiment, a sleeve 1-3 is further arranged in a valve hole of the valve body 1-1, and the sleeve 1-3 is abutted between the valve seat 1-2 and the valve cover 1-6; the valve core 1-4 is arranged in the sleeve 1-3 in a sliding fit manner, and the sleeve 1-3 is provided with a through flow hole matched with the valve core 1-4.
Referring to fig. 1, the safety valve 16 is located at one end of the middle steam pipeline 7 close to the rear steam pipeline 41, an inlet of the safety valve 16 is in butt joint with the middle steam pipeline 7 through a flange iii 8, a bolt iii 9, a nut iii 10 and a flange winding pad iii 11, and an outlet of the safety valve 16 is in butt joint with an exhaust pipe through a flange iv 12, a bolt iv 13, a nut iv 14 and a flange winding pad iv 15. The pressure gauge 17 is mounted on the rear steam pipeline 41 through a pressure gauge elbow assembly 18, and a pressure gauge primary door 19 is mounted on the pressure gauge elbow assembly 18.
The working process comprises the following steps:
steam enters an upper cavity of the pressure reducing valve 1 from the front steam pipeline 40, and drives the valve core rod 1-5 and the valve core 1-4 to reciprocate up and down in the sleeve 1-3 through the electric pressure reducing valve actuating mechanism 2 matched with the pressure reducing valve 1, so that the size of the area of a flow window on the sleeve 1-3 is changed immediately, and further, the first pressure reduction of the steam is realized;
the steam after the first pressure reduction flows into the lower cavity of the pressure reducing valve 1 through the valve seat 1-2, enters the pressure reducing mixing device 3 along with the flow channel of the valve body, and is mixed with the temperature reducing water atomized by the water spray atomizing device 23, so that the temperature reduction of the steam is realized;
the steam pressure is adjusted by changing steam pressure fluctuation into an electric signal and transmitting the electric signal to the DCS regulator through the pressure transmitter 21 on the rear steam pipeline 41, the DCS regulator transmits a control signal to the pressure reducing valve executing mechanism 2 of the pressure reducing valve 1, and the purpose of pressure regulation is realized by the action of the pressure reducing valve executing mechanism 2;
similarly, the steam temperature is adjusted by changing the thermoelectric potential of the thermocouple caused by the steam temperature change into an electric signal and transmitting the electric signal to the DCS regulator through the temperature detection element 22 on the rear steam pipeline 41, the DCS regulator transmits a control signal to the electric temperature-reducing valve actuating mechanism 37 of the temperature-reducing water regulating valve 36, and the temperature regulation purpose is realized by the action of the temperature-reducing valve actuating mechanism 37;
the safety protection device of the temperature and pressure reducing device adopts a spring safety valve 16 with a handle and a full-open type, when the steam pressure reduced by the pressure reducing valve 1 exceeds an allowable pressure value, the steam blows (has been set) a valve clack of the safety valve to be discharged into the atmosphere, and the pressure of the steam in a pipeline is reduced to be within an allowable range.
Example two
A steam turbine system adopts a temperature and pressure reducing device 50 in the first embodiment. In this embodiment, three boilers 48 are connected to the main steam header 45 to supply air to the main steam header 45. The main steam main pipe 45 supplies air to the two turbines 49, when the turbines 49 work, steam is extracted to the medium-pressure main pipe 46 and is exhausted to the low-pressure main pipe 47, and the medium-pressure main pipe 46 and the low-pressure main pipe 47 both supply air to users. A first temperature and pressure reducing device 50 is connected between the main steam main pipe 45 and the intermediate pressure main pipe 46, and a second temperature and pressure reducing device 50 is connected between the intermediate pressure main pipe 46 and the low pressure main pipe 47.
When in use, the utility model is used for cleaning the inner wall of the tank,
high-temperature high-pressure steam from the three boilers 48 flows to a main steam main pipe, and the pressure of the main steam main pipe is about 8.83 Mpa. On one hand, steam in the main steam main pipe is supplied to a medium-pressure main pipe for a user to use through a first temperature and pressure reducing device, and the first temperature and pressure reducing device reduces the steam pressure to about 2.8Mpa from 8.83 Mpa; on the other hand, steam in the main steam main pipe passes through two turbines to generate electricity, then is extracted to the medium-pressure main pipe, and is exhausted to the low-pressure main pipe.
The technical effects that the medium-pressure main pipe and the low-pressure main pipe are increased by a second temperature and pressure reducer are as follows:
1. the redundant medium-pressure steam discharged by the first temperature and pressure reducer is used for low pressure through the second temperature and pressure reducer, and the steam pressure is reduced to about 0.98Mpa from 2.8 Mpa;
2. the medium-pressure steam extracted by the two turbines passes through the second temperature and pressure reducing device to be supplied to low-pressure heat users;
3. through a temperature and pressure reducer, no. two temperature and pressure reducers and cooperation for unit load, heat supply network load adjustability improve greatly, ensure equipment operation safety.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A temperature and pressure reducing device comprises a pressure reducing valve (1), wherein an inlet of the pressure reducing valve (1) is connected with a front steam pipeline (40), an outlet of the pressure reducing valve (1) is connected with the front end of a middle steam pipeline (7), and the rear end of the middle steam pipeline (7) is connected with a rear steam pipeline (41); the temperature-reducing water pipeline (39) and the safety valve (16) are respectively connected with the medium steam pipeline (7);
the method is characterized in that:
the pressure reducing valve (1) is connected with a pressure reducing valve actuating mechanism (2) for controlling the action of the pressure reducing valve (1); a temperature-reducing water regulating valve (36) is installed in the temperature-reducing water pipeline (39), and the temperature-reducing water regulating valve (36) is connected with a temperature-reducing valve executing mechanism (37) for controlling the action of the temperature-reducing water regulating valve (36); the rear steam pipeline (41) is connected with a pressure transmitter (21) and a temperature detection element (22), the pressure transmitter (21) and the temperature detection element (22) are connected to a DCS (distributed control system) regulator, and the DCS regulator is in control connection with the reducing valve actuating mechanism (2) and the temperature reducing valve actuating mechanism (37);
the outlet of the pressure reducing valve (1) is connected with a pressure reducing mixing device (3), and the front end of the intermediate steam pipeline (7) is sleeved at the rear part of the pressure reducing mixing device (3); the water spraying and atomizing device (23) is installed at the connecting end of the desuperheating water pipeline (39) and the medium steam pipeline (7), and the water spraying and atomizing device (23) extends into the pressure reducing and mixing device (3) in the medium steam pipeline (7).
2. A temperature-reducing pressure-reducer according to claim 1, wherein: the pressure reduction mixing device (3) comprises a transition joint (4), the front end of the transition joint (4) is connected with an outlet of the pressure reduction valve (1), the rear end of the transition joint (4) is fixedly connected with a mixing liner tube (6), and a throttling orifice plate (5) is installed in the mixing liner tube (6); the medium steam pipeline (7) is sleeved outside the mixing liner pipe (6), the front end of the medium steam pipeline (7) is fixedly connected with the rear end of the transition joint (4), and the water spraying and atomizing device (23) extends into the mixing liner pipe (6).
3. A temperature-reducing pressure-reducer according to claim 1, wherein: a first manual stop valve (34) and a desuperheating water filter screen (35) are installed in the desuperheating water pipeline (39) in the water inlet direction of the desuperheating water regulating valve (36), and a second manual stop valve (42) and a check valve (38) are installed in the desuperheating water pipeline (39) in the water outlet direction of the desuperheating water regulating valve (36); the connecting end of the temperature-reducing water pipeline (39) and the middle steam pipeline (7) is divided into two symmetrical temperature-reducing water pipeline shunt pipes (39-1), and the temperature-reducing water pipeline shunt pipes (39-1) are symmetrically connected to two sides of the middle steam pipeline (7).
4. A temperature-reducing pressure-reducer according to claim 1, wherein: the pressure reducing valve (1) comprises a valve body (1-1), a valve seat (1-2) and a valve core (1-4) matched with the valve seat (1-2) are installed in a valve hole of the valve body (1-1), and the valve core (1-4) is connected with a valve core rod (1-5); the outer end of a valve hole of the valve body (1-1) is fixedly connected with a valve cover (1-6), and the valve core rod (1-5) penetrates through the valve cover (1-6) to be connected with the pressure reducing valve actuating mechanism (2); a sleeve (1-3) is further installed in a valve hole of the valve body (1-1), and the sleeve (1-3) abuts between the valve seat (1-2) and the valve cover (1-6); the valve core (1-4) is arranged in the sleeve (1-3) in a sliding fit manner, and the sleeve (1-3) is provided with a through hole matched with the valve core (1-4).
5. A temperature-reducing pressure-reducer according to claim 1, wherein: a thermometer (20) is arranged on the rear steam pipeline (41).
6. A temperature-reducing pressure-reducer according to claim 1, wherein: a pressure gauge (17) is arranged on the rear steam pipeline (41) through a pressure gauge bent pipe assembly (18); a primary door (19) of the pressure gauge is arranged on the elbow component (18) of the pressure gauge.
7. A temperature-reducing pressure-reducer according to claim 1, wherein: the middle steam pipeline (7) is supported on a fixed support (43); the front steam pipeline (40) and the rear steam pipeline (41) are respectively supported on a sliding support (44).
8. A steam turbine system using a temperature and pressure reducing device according to any one of claims 1 to 7, characterized in that: comprises a main steam main pipe (45) for supplying air to a steam turbine (49), and a medium-pressure main pipe (46) and a low-pressure main pipe (47) for supplying air to a user; the boiler (48) is connected to the main steam main pipe (45); the steam turbine (49) extracts steam to the medium-pressure main pipe (46), and the steam turbine (49) exhausts steam to the low-pressure main pipe (47); a temperature and pressure reducing device (50) is connected between the main steam main pipe (45) and the middle pressure main pipe (46), and another temperature and pressure reducing device (50) is connected between the middle pressure main pipe (46) and the low pressure main pipe (47).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222524663.6U CN218001177U (en) | 2022-09-23 | 2022-09-23 | Temperature and pressure reducer and steam turbine system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222524663.6U CN218001177U (en) | 2022-09-23 | 2022-09-23 | Temperature and pressure reducer and steam turbine system |
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| CN218001177U true CN218001177U (en) | 2022-12-09 |
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| CN202222524663.6U Active CN218001177U (en) | 2022-09-23 | 2022-09-23 | Temperature and pressure reducer and steam turbine system |
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| CN (1) | CN218001177U (en) |
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- 2022-09-23 CN CN202222524663.6U patent/CN218001177U/en active Active
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