CN208049726U - A kind of mixing wastewater with air experimental provision using venturi injection return water - Google Patents
A kind of mixing wastewater with air experimental provision using venturi injection return water Download PDFInfo
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- CN208049726U CN208049726U CN201820194272.3U CN201820194272U CN208049726U CN 208049726 U CN208049726 U CN 208049726U CN 201820194272 U CN201820194272 U CN 201820194272U CN 208049726 U CN208049726 U CN 208049726U
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Abstract
The utility model discloses a kind of mixing wastewater with air experimental provisions using venturi injection return water, including water pump, pumping line, threeway, three-way valve, experiment circulation waterway connecting tube, spinner flowmeter, experiment Venturi tube, white scale plate, non-return valve, bypassing circulation water route connecting tube, elbow, injection return water Venturi tube, tank inlet pipe, water tank inlet, water outlet of water tank, water tank, pump water inlet and guiding trestle.Total flowing water of water pump output is split into mainstream water (experiment recirculated water) and shunts water (bypassing circulation water), and mainstream water is completed after testing along experiment circulation waterway flowing to injection return water venturi throat perforation；Shunting water flows through return water venturi throat along bypassing circulation water route, using Venturi effect injection mainstream water, realizes that main, shunting water flow to water tank after converging and carries out subsequent cycle.The device reduces shunting water useless power consumption, increases experiment test range, and effective recovery experiment water ensures that experiment safety carries out.
Description
Technical field
The utility model is related to a kind of mixing wastewater with air experimental provision, especially a kind of air waters using venturi injection return water
Combined experiments device.
Background technology
During carrying out experimental study using Venturi tube mixing wastewater with air experimental provision, need to change circulation waterway stream
Amount studies the mobility status of injection bubble in the injection ratio of Venturi tube under different operating modes, or observation Venturi tube, calculates empty
Steep share.But for existing experimental provision, commonly used water circulating pump cannot achieve variable frequency adjustment, be power, rotating speed perseverance
Fixed water pump, therefore flow-rate adjustment mode is bypass adjusting, i.e., an isocon is connect on pumping line, keeps partial moisture outflow total
Experiment Venturi tube water flow is flowed through in water route to achieve the purpose that adjust.But there are following defects for such method：Shunting water accounts for
With the Partial Power of water circulating pump, increase the useless power consumption in experimentation；Feelings of the experiment circulation waterway in longer connecting leg structure
Under condition, water pump provide output and lift it is larger, limited by water container backwater pressure, experiment Venturi tube import and export pressure compared with
Height cannot achieve the measurement for injection performance under low operating mode.Therefore a kind of reduction shunting useless power consumption, increase experiment test range
Become the needs of art technology innovation with hydrodynamic experimental provision is returned.
Utility model content
To solve the problems, such as that the above mixing wastewater with air experimental provision exists, realizes and reduce shunting useless power consumption, increase to test and survey
It tries range and returns hydrodynamic effect, the utility model provides a kind of mixing wastewater with air experiment dress using venturi injection return water
It sets.
It is required to reach the above standard, scheme is as follows used in the utility model：
A kind of mixing wastewater with air experimental provision using venturi injection return water, it is characterised in that：It is pumped out including water pump 1, water
Water pipe 2, threeway 3, three-way valve 4, experiment circulation waterway connecting tube a5, experiment circulation waterway connecting tube b6, experiment circulation waterway
Connecting tube c7, experiment circulation waterway connecting tube d8, experiment circulation waterway connecting tube e9, experiment circulation waterway connecting tube f10, experiment
Circulation waterway connecting tube g11, experiment circulation waterway connecting tube h12, elbow a13, elbow b14, elbow c15, elbow d16, rotor
Flowmeter 17, experiment Venturi tube 18, white scale plate 19, non-return valve a20, bypassing circulation water route connecting tube a21, bypassing circulation
Water route connecting tube b22, bypassing circulation water route connecting tube c23, elbow e24, elbow f25, injection return water Venturi tube 26, water tank into
Water pipe a27, tank inlet pipe b28, non-return valve b29, water tank inlet 30, water outlet of water tank 31, water tank 32, pump water inlet 33
With guiding trestle a34, guiding trestle b35；Water pump 1 is connected to water tank 32 through pump water inlet 33, and water pump 1 is through pumping line 2
It is connected to threeway 3, the vertical port of threeway 3, experiment circulation waterway connecting tube a5, spinner flowmeter 17, experiment circulation waterway connect
Take over b6, elbow a13, experiment circulation waterway connecting tube c7, experiment Venturi tube 18, experiment circulation waterway connecting tube d8, check
Valve a20, experiment circulation waterway connecting tube e9, elbow b14, experiment circulation waterway connecting tube f10, elbow c15, experiment circulation waterway
Connecting tube g11, elbow d16, experiment circulation waterway connecting tube h12 are sequentially engaged, overall structure experiment circulation waterway, threeway 3
Horizontal port, bypassing circulation water route connecting tube a21, elbow e24, bypassing circulation water route connecting tube b22, elbow f25, bypassing circulation
Water route connecting tube c23 is sequentially engaged, and overall structure bypassing circulation water route, the experiment circulation waterway ends connecting tube h12 are returned with injection
26 throat's side perforation of hydrology venturi is connected, and bypassing circulation water route connecting tube c23 and injection return water Venturi tube 26 are tapered
End is connected, and experiment circulation waterway realizes that unicom is collected with bypassing circulation water route at 26 throat of injection return water Venturi tube, injection
26 flaring port of return water Venturi tube connects tank inlet pipe a27, and tank inlet pipe b28 is connected with water tank 32, tank inlet pipe
Non-return valve b29 is disposed between a27 and tank inlet pipe b28.
Each equipment, pipeline joint are all made of the flange connection with flexible gasket in the experimental provision.
It is circular stainless steel waterpipe that each connecting tube, which is section, in the experimental provision, and each elbow is that section is circle
Right angle stainless steel bend.
The three-way valve 4 is arranged in threeway 3, is adjusted changeable flow into of its aperture and is tested circulation waterway connecting tube a5's
Water flow meets experiment parameter required under different operating modes.
The experiment circulation waterway connecting tube g11 is disposed with guiding trestle a34 and guiding trestle b35, supports connecting tube
Ensure it in other direction non-displacement amounts in addition to axial direction simultaneously.
The experiment Venturi tube 18 is projected along direction of observation, one white scale plate 19 of the rear part background arrangement.
There are the water tank 32 31 two water tank inlet 30, water outlet of water tank ports, water inlet to be located at its side surface upper part,
Water outlet is located at its another side lower part.
The experimental provision, shunting water (bypassing circulation water) flow through injection return water venturi throat and form low-pressure area, according to
By inside and outside differential pressure injection mainstream water (experiment recirculated water), increase return water power.
The experimental provision, shunting water (bypassing circulation water) flow through injection return water venturi throat and form low-pressure area, with
The reduction of the areal pressure, Venturi exit pressure reduction is tested, expands the adjusting of experiment Venturi tube import and export pressure
Range.
The experimental provision, mainstream water (experiment recirculated water) sequentially flow through the perpendicular of threeway 3 along experiment circulation waterway flowing
Straight end mouth, experiment circulation waterway connecting tube a5, spinner flowmeter 17, experiment circulation waterway connecting tube b6, elbow a13, experiment follow
Ring water route connecting tube c7, experiment Venturi tube 18, experiment circulation waterway connecting tube d8, non-return valve a20, experiment circulation waterway connection
Pipe e9, elbow b14, experiment circulation waterway connecting tube f10, elbow c15, experiment circulation waterway connecting tube g11, elbow d16, experiment
Circulation waterway connecting tube h12, until 26 throat's perforation of injection return water Venturi tube；Shunting water (bypassing circulation water) is followed along shunting
Ring water route is flowed, i.e., sequentially flows through the horizontal port of threeway 3, bypassing circulation water route connecting tube a21, elbow e24, bypassing circulation water
Connecting pipe b22, elbow f25, bypassing circulation water route connecting tube c23, until 26 throat of injection return water Venturi tube, utilizes literary mound
In effect injection mainstream return water, realize that main, shunting water flow to water tank 32 after converging and carries out subsequent cycle.
Compared to the prior art, the utility model has the following advantages：
Using this method of injection return water Venturi tube injection return water, increase return water power, while improving return water effect
So that the kinetic energy of shunting water (bypassing circulation water) is utilized；Expand the adjustable range of experiment Venturi tube import and export pressure, it is real
Referring now to the measurement of Venturi tube injection performance under low operating mode；Replace open architecture with closed type structure, ensures experiment circulation waterway
Cleaning, improve experimental precision；Water tank inlet, the wrong row of water outlet height, prevent water pump air inlet, it is ensured that water pump keeps maximum to go out
Power；Two Venturi tube flaring end rear portion pipelines are equipped with non-return valve, and water in the pipeline of rear portion is prevented to be back to throat's low-pressure area, ensure
The safety of experiment carries out.
Description of the drawings
Fig. 1 is a kind of front view of mixing wastewater with air experimental provision using venturi injection return water of the utility model；
Fig. 2 is injection return water text mound in a kind of mixing wastewater with air experimental provision using venturi injection return water of the utility model
In pipe section front view；
Fig. 3 is the section master of threeway in a kind of mixing wastewater with air experimental provision using venturi injection return water of the utility model
View.
Specific implementation mode
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
A kind of mixing wastewater with air experimental provision using venturi injection return water of the utility model, including water pump 1, water pump water outlet
Pipe 2, threeway 3, three-way valve 4, experiment circulation waterway connecting tube a5, experiment circulation waterway connecting tube b6, experiment circulation waterway connect
Take over c7, experiment circulation waterway connecting tube d8, experiment circulation waterway connecting tube e9, experiment circulation waterway connecting tube f10, experiment follow
Ring water route connecting tube g11, experiment circulation waterway connecting tube h12, elbow a13, elbow b14, elbow c15, elbow d16, rotor stream
Gauge 17, experiment Venturi tube 18, white scale plate 19, non-return valve a20, bypassing circulation water route connecting tube a21, bypassing circulation water
Connecting pipe b22, bypassing circulation water route connecting tube c23, elbow e24, elbow f25, injection return water Venturi tube 26, water tank water intake
Pipe a27, tank inlet pipe b28, non-return valve b29, water tank inlet 30, water outlet of water tank 31, water tank 32,33 and of pump water inlet
Guiding trestle a34, guiding trestle b35.Using the mixing wastewater with air experimental provision of venturi injection return water, after water pump 1 starts, output
Recirculated water be split into mainstream water (experiment recirculated water) and shunt water (bypassing circulation water).Mainstream water is along experiment circulation waterway connection
Pipe a5 flow to 26 throat's side injection of injection return water Venturi tube to the h12 flowings of experiment circulation waterway connecting tube after completing experiment
Mouthful；It shunts water to flow along bypassing circulation water route connecting tube a21 to the bypassing circulation water route directions connecting tube c23, be returned flowing through injection
Water route return water is tested using Venturi effect injection at 26 throat of hydrology venturi, realizes that main, shunting water flow to water tank after converging
32 carry out subsequent cycle.
As preferred embodiments of the present invention, apparatus structure is as shown in Fig. 1, water pump 1, pumping line 2, three
Logical 3 threes are sequentially connected with, and three-way valve 4 is provided in threeway 3.The vertical port of threeway 3, experiment circulation waterway connecting tube a5,
Spinner flowmeter 17, experiment circulation waterway connecting tube b6, elbow a13, experiment circulation waterway connecting tube c7, experiment Venturi tube
18, experiment circulation waterway connecting tube d8, non-return valve a20, experiment circulation waterway connecting tube e9, elbow b14, experiment circulation waterway connect
Take over f10, elbow c15, experiment circulation waterway connecting tube g11, elbow d16, experiment circulation waterway connecting tube h12 are sequentially engaged,
Joint is all made of the flange connection with flexible gasket, overall structure experiment circulation waterway；The horizontal ends of threeway 3
Mouth, bypassing circulation water route connecting tube a21, elbow e24, bypassing circulation water route connecting tube b22, elbow f25, bypassing circulation water route connect
Take over c23 is sequentially engaged, and joint is all made of the flange connection with flexible gasket, is integrally formed bypassing circulation water
Road.In experimental provision each connecting tube be section be circular stainless steel waterpipe, each elbow be section be circular right angle not
Become rusty steel elbow.Test the circulation waterway ends connecting tube h12 and 26 throat's side perforation unicom of injection return water Venturi tube, shunting
Circulation waterway connecting tube c23 is connected with 26 tapered end of injection return water Venturi tube, and 26 flaring port of injection return water Venturi tube connects
Tank inlet pipe a27 is met, tank inlet pipe b28 is connected with water tank 32.It is set between tank inlet pipe a27 and tank inlet pipe b28
It is equipped with non-return valve b29；Experiment circulation waterway connecting tube g11 is provided with guiding trestle a34 and guiding trestle b35；Test venturi
18 rear portion of pipe is disposed with white scale plate 19.
With reference to attached drawing 1, specific workflow is as follows, and after water pump 1 starts, the recirculated water of output is flow to through pumping line 2
Threeway 3, water pump water outlet flow to experiment circulation waterway and bypassing circulation water route from the punishment of threeway 3.Three-way valve 4 in threeway 3, can
The water flow for adjusting experiment circulation waterway is tested the change of circulating water flow and is realized by adjusting the aperture of three-way valve 4, according to
Experiment parameter requires to be adjusted in real time；Bypassing circulation water flow is the difference of total water route flow and experiment circulation waterway flow.
Experiment water flows through spinner flowmeter 17 along circulation waterway, observes and records flow value；By testing Venturi tube 18, gas is realized
The injection of body or liquid observes bubble motion character, studies void fraction and injection ratio；It is flow to experiment circulation waterway end, and
It is split cycle water jet in 26 throat's side perforation of injection return water Venturi tube.Shunting water is flow to along circulation waterway to be drawn
Be emitted back towards 26 throat of hydrology venturi, test circulation waterway return water using Venturi effect injection, increase return water power, realize it is main,
Shunt the interflow of water.Subsequent cycle is carried out after flowing to water tank 32 behind return water interflow.It is provided with non-return valve after experiment Venturi tube 18
A20 is provided with non-return valve b29 after injection return water Venturi tube 26, prevents in the pipeline of rear portion water to be back to venturi throat low
Pressure area.
With reference to attached drawing 2, the tapered end of injection return water Venturi tube 26 and flaring end respectively with bypassing circulation water route connecting tube
The ends c23 are connected with tank inlet pipe a27, perforation and the ends the experiment circulation waterway connecting tube h12 phase of throat side
Connection.When injection principle is that shunting water flows through the contraction section of injection return water Venturi tube 26 along circulation waterway, due to circulation
Cross-sectional constriction, recirculated water speed at throat increases, and then forms low-pressure area, and experiment water route recirculation water is inside and outside perforation
Under the synergy of 1 continuous doing work of pressure difference and water pump, enter Venturi tube through perforation injection, realizes two water routes interflow, and along water
Case water inlet pipe b28 flow to water tank 32.
It is object of reference with pumping line 2 with reference to attached drawing 3, with it using the threeway port of flange arrangement unicom as lower port,
The recirculated water that the port is flowed through through pumping line 2 is total flowing water；The threeway port parallel with 2 axis direction of pumping line is
This is flowed through in vertical port, the port with flange arrangement and experiment circulation waterway connecting tube a5 initiating terminal unicom, the total flowing water of a part
Port enters experiment recirculated water connecting tube a5, this part recirculated water is main flowing water (experiment recirculated water)；With 2 diameter of pumping line
The parallel threeway port in direction is horizontal port, which is joined with flange arrangement and bypassing circulation water route connecting tube a21 initiating terminals
Logical, the total flowing water of another part flows through this port and enters bypassing circulation water connecting tube a21, this part recirculated water is shunting water (shunting
Recirculated water).
In conclusion compared to conventional mixing wastewater with air experimental provision, the utility model utilizes injection return water Venturi tube
The pressure difference of injection return water increases return water power, so that the kinetic energy of shunting water is utilized while improving return water effect；Utilize injection
It is formed by low pressure in throat when return water Venturi tube injection return water, further such that experiment Venturi exit pressure reduction,
Expand the adjustable range of experiment Venturi tube import and export pressure, realizes the measurement for Venturi tube injection performance under low operating mode；
Replace open architecture with closed type structure, ensure the cleaning in experiment water route, improves experimental precision；Water tank inlet, water outlet height
Mistake row, return water band gas are assembled in water tank upper, prevent water pump air inlet, it is ensured that water pump keeps maximum output；Two Venturi tube flarings
End rear portion pipeline is equipped with non-return valve, and water in the pipeline of rear portion is prevented to be back to throat's low-pressure area, ensures that the safety of experiment carries out.
Claims (10)
1. a kind of mixing wastewater with air experimental provision using venturi injection return water, it is characterised in that：It is pumped out including water pump (1), water
Water pipe (2), three-way valve (4), experiment circulation waterway connecting tube (a5), tests circulation waterway connecting tube (b6), is real at threeway (3)
Test circulation waterway connecting tube (c7), experiment circulation waterway connecting tube (d8), experiment circulation waterway connecting tube (e9), experiment recirculated water
Connecting pipe (f10), experiment circulation waterway connecting tube (g11), experiment circulation waterway connecting tube (h12), elbow (a13), elbow
(b14), elbow (c15), elbow (d16), spinner flowmeter (17), experiment Venturi tube (18), white scale plate (19), check
Valve (a20), bypassing circulation water route connecting tube (a21), bypassing circulation water route connecting tube (b22), bypassing circulation water route connecting tube
(c23), elbow (a24), elbow (b25), injection return water Venturi tube (26), tank inlet pipe (a27), tank inlet pipe
(b28), non-return valve (b29), water tank inlet (30), water outlet of water tank (31), water tank (32), pump water inlet (33) and guiding
Holder (a34), guiding trestle (b35), water pump (1) are connected to water tank (32) through pump water inlet (33), and water pump (1) is pumped out through water
Water pipe (2) is connected to threeway (3), the vertical port of threeway (3), experiment circulation waterway connecting tube (a5), spinner flowmeter (17),
Test circulation waterway connecting tube (b6), elbow (a13), experiment circulation waterway connecting tube (c7), experiment Venturi tube (18), experiment
Circulation waterway connecting tube (d8), non-return valve (a20), experiment circulation waterway connecting tube (e9), elbow (b14), experiment circulation waterway
Connecting tube (f10), elbow (c15), experiment circulation waterway connecting tube (g11), elbow (d16), experiment circulation waterway connecting tube
(h12) it sequentially engages, overall structure experiment circulation waterway；The horizontal port of threeway (3), bypassing circulation water route connecting tube (a21),
Elbow (a24), bypassing circulation water route connecting tube (b22), elbow (b25), bypassing circulation water route connecting tube (c23) sequentially engage,
It is integrally formed bypassing circulation water route, the experiment circulation waterway connecting tube end (h12) and injection return water Venturi tube (26) throat side
Face perforation is connected, and bypassing circulation water route connecting tube (c23) is connected with injection return water Venturi tube (26) tapered end, experiment cycle
Water route realizes that unicom is collected with bypassing circulation water route at injection return water Venturi tube (26) throat, injection return water Venturi tube
(26) flaring port connection tank inlet pipe (a27), tank inlet pipe (b28) are connected with water tank (32), tank inlet pipe (a27)
Non-return valve (b29) is disposed between tank inlet pipe (b28).
2. according to a kind of mixing wastewater with air experimental provision using venturi injection return water described in claim 1, it is characterised in that：
Each equipment, pipeline joint are all made of the flange connection with flexible gasket in the experimental provision.
3. according to a kind of mixing wastewater with air experimental provision using venturi injection return water described in claim 1, it is characterised in that：
In the experimental provision each connecting tube be section be circular stainless steel waterpipe, each elbow be section be circular right angle not
Become rusty steel elbow.
4. according to a kind of mixing wastewater with air experimental provision using venturi injection return water described in claim 1, it is characterised in that：
The three-way valve (4) is arranged in threeway (3), adjusts the changeable water for flowing into experiment circulation waterway connecting tube (a5) of its aperture
Flow meets experiment parameter required under different operating modes.
5. according to a kind of mixing wastewater with air experimental provision using venturi injection return water described in claim 1, it is characterised in that：
The experiment circulation waterway connecting tube (g11) is disposed with guiding trestle (a34) and guiding trestle (b35), supports the same of connecting tube
When ensure it in other direction non-displacement amounts in addition to axial direction.
6. according to a kind of mixing wastewater with air experimental provision using venturi injection return water described in claim 1, it is characterised in that：
The experiment Venturi tube (18) projects along direction of observation, one white scale plate (19) of the rear part background arrangement.
7. according to a kind of mixing wastewater with air experimental provision using venturi injection return water described in claim 1, it is characterised in that：
There are the water tank (32) (31) two water tank inlet (30), water outlet of water tank ports, water inlet to be located at its side surface upper part, go out
The mouth of a river is located at its another side lower part.
8. according to a kind of mixing wastewater with air experimental provision using venturi injection return water described in claim 1, it is characterised in that：
The experimental provision, shunts water, that is, bypassing circulation water, and mainstream water tests recirculated water；Shunting water flows through injection return water Venturi tube
(26) throat forms low-pressure area, by inside and outside differential pressure injection mainstream water, increases return water power.
9. according to a kind of mixing wastewater with air experimental provision using venturi injection return water described in claim 1, it is characterised in that：
The experimental provision, shunting water flows through injection return water Venturi tube (26) throat and forms low-pressure area, with the drop of the areal pressure
Low, experiment Venturi tube (18) outlet pressure reduces, and expands the adjustable range of experiment Venturi tube (18) import and export pressure.
10. according to a kind of mixing wastewater with air experimental provision using venturi injection return water described in claim 1, feature exists
In：The experimental provision, mainstream water sequentially flow through vertical port, the experiment cycle of threeway (3) along experiment circulation waterway flowing
Water route connecting tube (a5), spinner flowmeter (17), experiment circulation waterway connecting tube (b6), elbow (a13), experiment circulation waterway connect
Take over (c7), experiment Venturi tube (18), experiment circulation waterway connecting tube (d8), non-return valve (a20), experiment circulation waterway connection
(e9) is managed, elbow (b14), experiment circulation waterway connecting tube (f10), elbow (c15), circulation waterway connecting tube (g11) is tested, is curved
Head (d16), experiment circulation waterway connecting tube (h12), until injection return water Venturi tube (26) throat perforation；Shunt water edge point
Flow circulation waterway flowing, i.e., sequentially flow through the horizontal port of threeway (3), bypassing circulation water route connecting tube (a21), elbow (a24),
Bypassing circulation water route connecting tube (b22), elbow (b25), bypassing circulation water route connecting tube (c23), until injection return water venturi
(26) throat is managed, using Venturi effect injection mainstream return water, it is next to realize that main, shunting water flow to water tank (32) progress after converging
Cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820194272.3U CN208049726U (en) | 2018-02-05 | 2018-02-05 | A kind of mixing wastewater with air experimental provision using venturi injection return water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820194272.3U CN208049726U (en) | 2018-02-05 | 2018-02-05 | A kind of mixing wastewater with air experimental provision using venturi injection return water |
Publications (1)
| Publication Number | Publication Date |
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| CN208049726U true CN208049726U (en) | 2018-11-06 |
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ID=63993025
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| CN201820194272.3U Active CN208049726U (en) | 2018-02-05 | 2018-02-05 | A kind of mixing wastewater with air experimental provision using venturi injection return water |
Country Status (1)
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| CN (1) | CN208049726U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110115941A (en) * | 2018-02-05 | 2019-08-13 | 西安交通大学 | It is a kind of that hydrodynamic mixing wastewater with air experimental provision is increased back using venturi |
| CN114720087A (en) * | 2022-03-22 | 2022-07-08 | 山东核电设备制造有限公司 | Real current testing device and method for high-voltage throttling device for nuclear power |
-
2018
- 2018-02-05 CN CN201820194272.3U patent/CN208049726U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110115941A (en) * | 2018-02-05 | 2019-08-13 | 西安交通大学 | It is a kind of that hydrodynamic mixing wastewater with air experimental provision is increased back using venturi |
| CN110115941B (en) * | 2018-02-05 | 2024-01-26 | 西安交通大学 | Adopt venturi to increase gas-water mixing experimental apparatus of return water power |
| CN114720087A (en) * | 2022-03-22 | 2022-07-08 | 山东核电设备制造有限公司 | Real current testing device and method for high-voltage throttling device for nuclear power |
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