CN218895878U - Pressure measuring device for nozzle of multi-nozzle impulse turbine - Google Patents
Pressure measuring device for nozzle of multi-nozzle impulse turbine Download PDFInfo
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- CN218895878U CN218895878U CN202223339709.3U CN202223339709U CN218895878U CN 218895878 U CN218895878 U CN 218895878U CN 202223339709 U CN202223339709 U CN 202223339709U CN 218895878 U CN218895878 U CN 218895878U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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Abstract
The utility model discloses a pressure measuring device for a nozzle of a multi-nozzle impulse turbine, which relates to the field of water turbines and comprises at least one measuring component, wherein the measuring component is used for measuring the pressure of one nozzle of the impulse turbine, the measuring component comprises a measuring channel, a pressure measuring component and a control piece, the measuring channel is arranged on a needle component of the nozzle, a first end of the measuring channel is positioned at a needle head part of the needle component, which is close to a water outlet of the nozzle, a measuring action end of the pressure measuring component is positioned in the measuring channel, the measuring channel is arranged on the needle component of the nozzle, the water outlet of the nozzle is communicated with the pressure measuring component, the measuring action end of the pressure measuring component is in medium communication with the first end of the measuring channel through the control piece, when the pressure of the nozzle is required to be measured, the static pressure of the needle head part can be detected according to the Pascal principle, and then the jet speed of the needle head part is calculated, so that the jet speed of the nozzle is monitored.
Description
Technical Field
The utility model relates to the field of water turbines, in particular to a pressure measuring device for a nozzle of a multi-nozzle impulse water turbine.
Background
The impulse turbine is widely applied in China because of wide water head range, especially in high water head range. The current development trend of impulse turbines is (1) developing higher head and larger installed capacity turbines, with emphasis on improving hydraulic stability and reliability; (2) The simple and reliable high-speed water turbine with multiple nozzles and simplified control system is developed in small engineering. Compared with the counter-impact water turbine, the impact water turbine changes the flow of the nozzles by adjusting the travel of the spray needles, and the impact water turbine unit with the same water head can be provided with a plurality of nozzles at the same time to enlarge the installation capacity of a single unit. The current hydroelectric power industry widely adopts a six-nozzle impact water turbine, and the flow of each nozzle is adjusted by moving the stroke of a spray needle arranged in the nozzle and controlling the annular area of a water outlet of the nozzle; because the spray needles in the nozzles are installed, the deviation of the stroke of the spray needles and the blockage of floaters in water flow during the operation of the impulse turbine can cause the difference of the jet flow of each nozzle, thereby generating unbalanced hydraulic vibration on the rotating wheel.
Disclosure of Invention
The utility model aims to solve the problems and designs a pressure measuring device for a nozzle of a multi-nozzle impulse turbine.
The utility model realizes the above purpose through the following technical scheme:
pressure measuring device for a nozzle of a multi-nozzle impulse turbine, comprising at least one measuring assembly for measuring the pressure of a nozzle of a multi-nozzle impulse turbine, each measuring assembly comprising:
a measurement channel; the measuring channel is arranged on the needle assembly of the nozzle, and the first end of the measuring channel is positioned at the needle head part of one end of the needle close to the water outlet of the nozzle in the needle assembly;
a pressure measurement member; the measuring action end of the pressure measuring part is arranged on the end face of the tail part of the needle rod of the needle assembly of the measuring channel;
a control member; the control piece is used for controlling whether the measurement action end of the pressure measurement piece is in medium communication with the first end of the measurement channel or not, the control action end of the control piece is positioned between the measurement action end of the pressure measurement piece and the first end of the measurement channel, when pressure measurement is carried out, the control piece controls the measurement action end of the pressure measurement piece to be in medium communication with the first end of the measurement channel, and after the pressure measurement is finished, the control piece controls the measurement action end of the pressure measurement piece to be in medium cut-off with the first end of the measurement channel.
The utility model has the beneficial effects that: through set up measuring channel on the needle subassembly of nozzle, and measuring channel intercommunication nozzle's delivery port and pressure measurement spare, through the control effect of control piece, when the pressure of needs measuring the nozzle, the measurement effect end of pressure measurement spare and measuring channel's first end medium intercommunication can detect the static pressure of needle head according to pascal's principle, and then calculate the efflux speed of needle head, realize the real-time on-line monitoring to nozzle efflux speed.
Drawings
FIG. 1 is a schematic view of a pressure measuring device for a nozzle of a multi-nozzle impulse turbine according to the present utility model;
FIG. 2 is a schematic view of the structure of a needle head in the pressure measuring device for a nozzle of a multi-nozzle impulse turbine according to the present utility model;
FIG. 3 is a schematic view of the structure of a needle bar in the pressure measuring device for a nozzle of a multi-nozzle impulse turbine according to the present utility model;
wherein corresponding reference numerals are as follows:
the device comprises a 1-needle head part, a 2-mouth ring, a 3-needle rod, a 4-nozzle, a 5-nozzle flange, a 6-nozzle, a 7-first channel, an 8-control valve, a 9-pressure gauge, a 10-pressure sensor and a 11-second channel.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships conventionally put in place when the inventive product is used, or the directions or positional relationships conventionally understood by those skilled in the art are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and therefore should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, terms such as "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
The following describes specific embodiments of the present utility model in detail with reference to the drawings.
As shown in fig. 1, 2 and 3, the pressure measuring device for the nozzle 4 of the impulse turbine comprises at least one measuring assembly, one measuring assembly for measuring the pressure of one nozzle 4 of the impulse turbine, each measuring assembly comprising:
a measurement channel; the measuring channel is arranged on the needle assembly of the nozzle 4, and the first end of the measuring channel is positioned at the needle head part 1 of one end of the needle assembly close to the water outlet of the nozzle 4;
a pressure measurement member; the measuring action end of the pressure measuring part is arranged on the end face of the measuring channel at the tail part of the needle rod 3 of the needle assembly;
a control member; the control piece is used for controlling whether the measurement action end of the pressure measurement piece is in medium communication with the first end of the measurement channel or not, the control action end of the control piece is positioned between the measurement action end of the pressure measurement piece and the first end of the measurement channel, when pressure measurement is carried out, the control piece controls the measurement action end of the pressure measurement piece to be in medium communication with the first end of the measurement channel, and after the pressure measurement is finished, the control piece controls the measurement action end of the pressure measurement piece to be in medium cut-off with the first end of the measurement channel.
The measuring channel comprises a first channel 7 and a second channel 11, the first channel 7 is arranged on the needle head 1, the second channel 11 is arranged on the needle rod 3 of the needle assembly, the control action end of the control piece is arranged on the second channel 11, the needle head 1 is detachably arranged on the needle rod 3, and the first channel 7 is communicated with the second channel 11 when the needle head 1 is arranged on the needle rod 3.
The first channel 7 and the second channel 11 are located on the central axis of the needle head 1 and the needle bar 3, respectively, the diameter size of the first channel 7 ranges from 4 to 6mm, and the diameter size of the second channel 11 ranges from 10 to 12mm.
The diameter of the first channel 7 is 5mm and the diameter of the second channel 7 is 11mm.
The pressure measuring part comprises a pressure sensor 10 and a pressure gauge 9, wherein the pressure measuring action ends of the pressure sensor 10 and the pressure gauge 9 are positioned at one side of the control action end of the control part far away from the first end of the measuring channel, and the pressure sensor 10PT200 series high-precision pressure transmitter (pressure sensor) is widely applied to pressure measurement and control of industrial equipment, water conservancy, chemical industry, medical treatment, electric power, air conditioning, diamond press, metallurgy, vehicle braking, building water supply and the like; the parameters are the measuring range of 1.0MPa-20MPa, the sensitivity mV/V of 1.0+/-0.05, the sensitivity temperature coefficient of less than or equal to% F.S/10 C+/-0.03, the nonlinearity of less than or equal to% F.S +/-0.02- +/-0.03, the working temperature range of C-20 ℃ to +80 ℃, the hysteresis of less than or equal to% F.S +/-0.02- +/-0.03, the input resistance Q400+/-100, the repeatability of less than or equal to% F.S +/-0.02- +/-0.03, the output resistance 2350+/-59, the creep of less than or equal to% F.S/30 min+/-0.02, the safety overload of less than or equal to% F.S% F.S, the zero point output of less than or equal to% F.S < 2, and the insulation resistance M9 of more than or equal to 5000M2 (50 VDC). The pressure gauge is Y-200 in model number, the parameter range is 0Pa-20MPa, and the precision is 1.0.
The control piece comprises a control valve 8, wherein the control valve 8 is arranged between the measuring action end of the pressure measuring piece and the first end of the measuring channel, and the control valve 8 is an H41H lifting check valve. So as to prevent the backflow of the fluid medium, avoid water hammer, and have nominal pressure PN 1.0-20 Mpa, working temperature-29-550 ℃ and diameter dimension of 11mm.
The pressure measuring device display module is used for displaying measuring results of the pressure sensor and the pressure gauge, the data signal input end of the display module is connected with the data signal output end of the pressure sensor and the data signal output end of the pressure gauge, and the display module is a display with a display function and comprises, but is not limited to, a mobile phone, a display screen, a computer and a flat plate.
The working principle of the pressure measuring device for the impulse turbine nozzle 4 of the present utility model is as follows:
the first channel 7 is arranged at the axle center of the needle head 1, the second channel 11 is arranged at the axle center of the needle rod 3, when the needle head 1 is fixedly connected with the needle rod 3 through threads, the first channel 7 is communicated with the second channel 11 to form a measuring channel, the measuring channel extends to the axle tail end of the needle rod 3, the pressure sensor 10 and the pressure gauge 9 are arranged at the tail end, the static pressure of the second channel 11 at the axle tail end of the needle rod 3 can be measured, the measured data of the pressure sensor 10 and the data of the pressure gauge 9 are transmitted to a computer capable of analyzing the data, according to the Pascal principle, the static pressure at the tail end of the needle rod 3 of the second channel 11 is equal to the static pressure at the axle center of the needle head 1, and according to the quantity relation between the flow velocity and the pressure of the Bernoulli equation, the flow deviation value emitted by the nozzle 4 can be calculated through the deviation value of the static pressure of the needle head 1 of the nozzle 4, and potential hydraulic instability symptoms of the turbine runner can be early warned to power station site operators in time so as to avoid potential safety hazards of the impulse turbine.
The technical scheme of the utility model is not limited to the specific embodiment, and all technical modifications made according to the technical scheme of the utility model fall within the protection scope of the utility model.
Claims (11)
1. Pressure measuring device for a nozzle of a multi-nozzle impulse turbine, characterized in that it comprises at least one measuring assembly, one measuring assembly for measuring the pressure of one nozzle of a multi-nozzle impulse turbine, each measuring assembly comprising:
a measurement channel; the measuring channel is arranged on the needle assembly of the nozzle, and the first end of the measuring channel is positioned at the needle head part of one end of the needle assembly, which is close to the water outlet of the nozzle;
a pressure measurement member; the measuring action end of the pressure measuring part is arranged on the end face of the tail part of the needle rod of the needle assembly of the measuring channel;
a control member; the control piece is used for controlling whether the measurement action end of the pressure measurement piece is in medium communication with the first end of the measurement channel or not, the control action end of the control piece is positioned between the measurement action end of the pressure measurement piece and the first end of the measurement channel, when pressure measurement is carried out, the control piece controls the measurement action end of the pressure measurement piece to be in medium communication with the first end of the measurement channel, and after the pressure measurement is finished, the control piece controls the measurement action end of the pressure measurement piece to be in medium cut-off with the first end of the measurement channel.
2. The pressure measuring device for a nozzle of a multi-nozzle impulse turbine as claimed in claim 1, characterized in, that the measuring channel comprises a first channel and a second channel, the first channel is provided on the needle head, the second channel is provided on the needle bar, the control action end of the control member is provided on the second channel, the needle head is detachably mounted on the needle bar, and the first channel and the second channel are communicated when the needle head is mounted on the needle bar.
3. The pressure measuring device for a nozzle of a multi-nozzle impulse turbine as claimed in claim 2, characterized in, that the first channel and the second channel are located on the central axis of the needle head and the needle bar, respectively.
4. A pressure measuring device for a nozzle of a multi-nozzle impulse turbine as claimed in any one of the claims 1-3, characterized in, that the pressure measuring member comprises a pressure sensor, the pressure measuring active end of which is located at the side of the control active end of the control member remote from the first end of the measuring channel.
5. The pressure measuring device for a nozzle of a multi-nozzle impulse turbine as claimed in claim 4, characterized in, that the pressure measuring member further comprises a pressure gauge, the pressure measuring active end of the pressure gauge being located at a side of the control active end of the control member remote from the first end of the measuring channel.
6. A pressure measuring device for a nozzle of a multi-nozzle impulse turbine as claimed in any one of the claims 1-3, characterized in, that the control member comprises a control valve arranged between the measuring active end of the pressure measuring member and the first end of the measuring channel.
7. A pressure measuring device for a nozzle of a multi-nozzle impulse turbine as claimed in claim 3, characterized in, that the diameter size of the first channel is in the range of 4-6mm and the diameter size of the second channel is in the range of 10-12mm.
8. The pressure measuring device for a nozzle of a multi-nozzle impulse turbine as claimed in claim 7, characterized in, that the diameter size of the first channel is 5mm and the diameter size of the second channel is 11mm.
9. The pressure measuring device for a nozzle of a multi-nozzle impulse turbine as claimed in claim 5, characterized in, that the pressure sensor is PT200 and the pressure gauge is a Y-200 pressure gauge.
10. The pressure measuring device for a nozzle of a multi-nozzle impulse turbine as claimed in claim 6, characterized in, that the control valve is an H41H lifting check valve.
11. The pressure measuring device for a nozzle of a multi-nozzle impulse turbine as claimed in claim 5, characterized in, that the pressure measuring device display module is used for displaying the measurement results of the pressure sensor and the pressure gauge, and the data signal input end of the display module is connected with the data signal output end of the pressure sensor and the data signal output end of the pressure gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223339709.3U CN218895878U (en) | 2022-12-12 | 2022-12-12 | Pressure measuring device for nozzle of multi-nozzle impulse turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223339709.3U CN218895878U (en) | 2022-12-12 | 2022-12-12 | Pressure measuring device for nozzle of multi-nozzle impulse turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218895878U true CN218895878U (en) | 2023-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223339709.3U Active CN218895878U (en) | 2022-12-12 | 2022-12-12 | Pressure measuring device for nozzle of multi-nozzle impulse turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218895878U (en) |
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2022
- 2022-12-12 CN CN202223339709.3U patent/CN218895878U/en active Active
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