CN111059290A - Throttling device and flow regulating system with same - Google Patents
Throttling device and flow regulating system with same Download PDFInfo
- Publication number
- CN111059290A CN111059290A CN201811199539.9A CN201811199539A CN111059290A CN 111059290 A CN111059290 A CN 111059290A CN 201811199539 A CN201811199539 A CN 201811199539A CN 111059290 A CN111059290 A CN 111059290A
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- Prior art keywords
- pipe
- throttling
- flow
- flow regulating
- pipe part
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
- F16K1/38—Valve members of conical shape
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/54—Arrangements for modifying the way in which the rate of flow varies during the actuation of the valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/047—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
- G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
- G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
- G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Flow Control (AREA)
Abstract
The invention discloses a throttling device, which comprises a flow regulating pipe and a throttling piece, wherein the flow regulating pipe comprises a first pipe part and a second pipe part which are communicated, the first pipe part is provided with a fluid inlet, the second pipe part is provided with a fluid outlet, a throttling opening is arranged between the inside of the first pipe part and the inside of the second pipe part, and the radial size of the throttling opening is smaller than that of the inside of the first pipe part and/or the second pipe part; the throttling element comprises a head part with a cone structure and a rod part connected with the flat end of the head part, and the radial size of the flat end of the head part and the rod part is smaller than the radial size of the inner part of the first pipe part and/or the second pipe part; when the throttling element is inserted into the flow regulating pipe along the axial direction from the inside of the first pipe part/the second pipe part, the tip end of the head part is over against the throttling opening, the opposite end of the connecting end of the rod part and the head part penetrates out of the flow regulating pipe, and the area of the throttling opening can be adjusted by pushing the rod part along the axial direction. The invention also provides a flow regulating system comprising the throttling device, which can accurately realize flow regulation.
Description
Technical Field
The invention relates to the technical field of flow regulation, in particular to a throttling device and a flow regulation system with the throttling device.
Background
Fluid testing is typically required at certain flow rates and pressures. For example, in the process of detecting the exhaled gas, the flow and the pressure of the exhaled gas need to be adjusted within a certain range by the flow adjusting device, so as to obtain a relatively accurate detection result.
The throttling device is one of the most commonly used flow regulating devices, and is usually a throttling place arranged in a pipeline through which fluid flows, and the flow beam forms local contraction at the throttling place, so that the flow speed is increased and the static pressure is reduced. In order to meet different flow regulation requirements, the conventional throttling device usually adopts manual throttling area regulation, and such flow regulation methods usually have the problem of low precision, and in addition, the operation difficulty of fluid detection is increased, and the fluid detection efficiency is reduced.
Disclosure of Invention
The invention provides a throttling device and a flow regulating device with the throttling device, and solves the problems of low fluid flow regulating precision, difficult operation and the like.
One object of the present invention is to provide a throttling device, comprising a flow regulating pipe and a throttling member, wherein the flow regulating pipe comprises a first pipe part and a second pipe part which are communicated with each other, the first pipe part is provided with a fluid inlet, the second pipe part is provided with a fluid outlet, a throttling opening is arranged between the inner part of the first pipe part and the inner part of the second pipe part, and the radial size of the throttling opening is smaller than that of the inner part of the first pipe part and/or the second pipe part; the throttling element comprises a head part with a cone structure and a rod part connected with the flat end of the head part, and the radial size of the flat end of the head part and the rod part is smaller than that of the inner part of the first pipe part and/or the second pipe part; when the throttling element is inserted into the flow regulating pipe from the inside of the first pipe part/the second pipe part along the axial direction, the tip end of the head part is over against the throttling opening, the opposite end of the connecting end of the rod part and the head part penetrates out of the flow regulating pipe, the rod part is pushed along the axial direction, and the area size of the throttling opening can be adjusted.
Furthermore, the inner diameters of the first pipe part and the second pipe part of the flow regulating pipe are the same, a flange is annularly arranged on the inner wall of the joint of the first pipe part and the second pipe part, so that a throttling opening is formed in the flow regulating pipe, and the fluid inlet and the fluid outlet are opposite to the throttling opening. Or the like, or, alternatively,
the first pipe part is in butt joint with the second pipe part, and the inner diameter of the first pipe part is smaller than that of the second pipe part, so that a throttling opening is formed between the connecting parts of the first pipe part and the second pipe part.
Further, the fluid inlet is opposite to the throttling opening, and the fluid outlet is arranged on the side wall of the second pipe part; the second pipe part further comprises an end wall facing the throttling opening, a through hole is formed in the end wall, and when the throttling element is arranged inside the second pipe part, the tail end of the rod part of the throttling element penetrates out of the flow regulating pipe through the through hole.
Further, the end wall movable cover is arranged at the opening at the tail end of the second pipe part.
Further, the throttling device also comprises a pushing unit, the pushing unit comprises a ball screw and a speed regulating motor, and the ball screw comprises a screw rod and a nut; the speed regulating motor is a stepping motor, a servo motor, a brushless motor or a variable frequency speed regulating motor, and is in transmission connection with the screw rod, the rod part of the throttling element is fixed on the nut, and the rod part and the screw rod are arranged in parallel.
Further, the pushing unit further comprises a speed reducing device, the speed reducing device comprises an input end and an output end, and the rotating speed of the output end is smaller than that of the input end; the input end is in transmission connection with the speed regulating motor, and the output end is in transmission connection with the ball screw.
Further, the speed reduction device is a gear reducer.
Furthermore, the throttling device also comprises a fixing frame used for installing the pushing unit, a fixing hole matched with the rod part of the throttling element is formed in the fixing frame, and the rod part penetrates through the fixing hole and then is fixed on the screw cap.
A second object of the present invention is to provide a flow rate regulating system, which includes any one of the throttling devices described above, and further includes a flow rate sensor, a pressure sensor and a microprocessor, wherein the flow rate sensor is used for detecting a flow rate of a fluid flowing through the flow rate regulating pipe, the pressure sensor is used for detecting a pressure of the fluid flowing through the flow rate regulating pipe, and the microprocessor is respectively connected to the pressure sensor, the flow rate sensor and the speed regulating motor, and is used for receiving flow rate data collected by the flow rate sensor and pressure data collected by the pressure sensor, and regulating a working parameter of the speed regulating motor according to the flow rate data and the pressure data.
According to the throttling device, the throttling element is pushed to move horizontally to change the area of the throttling opening, so that the flow can be conveniently adjusted; by providing a reduction in speed within the propulsion unit, the flow can be more accurately regulated. The flow regulating system can collect fluid flow and pressure data, so that the flow is automatically regulated, the operation steps are simplified, the flow regulating efficiency is improved, and the flow regulation is more accurate.
Drawings
Fig. 1 is a front sectional view of a part of a throttle apparatus in a first embodiment of the present invention.
Fig. 2 is a front sectional view showing the flow rate regulating tube in the process of assembling the flow rate regulating tube in the first embodiment of the present invention.
Fig. 3 is a front sectional view of the throttle device in the first embodiment of the present invention.
Fig. 4 is a schematic view of the structure of the reduction gear in the first embodiment of the present invention.
Fig. 5 is a front sectional view of a part of the throttle apparatus in the second embodiment of the present invention.
Fig. 6 is a functional block diagram of a flow regulating system in a third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.
Referring to fig. 1 and 2, a first embodiment of the invention discloses a throttling device, which comprises a flow regulating pipe 1 and a throttling element 2, wherein the flow regulating pipe 1 comprises a first pipe part 11 and a second pipe part 12 which are communicated, the first pipe part 11 is provided with a fluid inlet 111, the second pipe part 12 is provided with a fluid outlet 121, a throttling opening 13 is arranged between the inside of the first pipe part 11 and the inside of the second pipe part 12, and the cross-sectional dimension of the throttling opening 13 along the radial direction of the flow regulating pipe 1 is smaller than the radial dimension of the inside of the first pipe part 11 and/or the second pipe part 12; the orifice 2 comprises a head 21 with a conical structure and a stem 22 connected to the flat end of the head 21, the flat end of the head 21 and the stem 22 having a radial dimension smaller than the radial dimension of the inside of the first pipe portion 11 and/or the second pipe portion 12; when the throttling element 2 is inserted into the flow rate regulating pipe 1 from the inside of the first pipe part 11/the second pipe part 12 along the axial direction, the tip end of the head part 21 is opposite to the throttling opening 13, the opposite end of the connecting end of the rod part 22 and the head part 21 penetrates out of the flow rate regulating pipe 1, the rod part 22 is pushed along the axial direction, the position of the head part 21 at the throttling opening 13 can be adjusted, and therefore the area size of the throttling opening 13 can be adjusted.
The throttling device provided by the embodiment can flexibly adjust the area of the throttling opening by pushing the throttling element, thereby conveniently realizing flow regulation.
In this embodiment, the first pipe portion 11 is butted against the second pipe portion 12, and the inner diameter of the first pipe portion 11 is smaller than the inner diameter of the second pipe portion 12, so that an orifice 13 is formed between the joints of the first pipe portion 11 and the second pipe portion 12, and the radial interface dimension of the orifice 13 is smaller than the radial dimension inside the second pipe portion 12. The flow control tube that this scheme provided is simple in structure, easily shaping.
Further, the fluid inlet 111 faces the throttle 13, and the fluid outlet 121 is disposed on the sidewall of the second pipe portion 12; the second pipe portion 12 further includes an end wall 122 facing the orifice 13, the end wall 122 is provided with a through hole, and when the throttling member 2 is disposed inside the second pipe portion 12, the end of the rod portion 22 penetrates through the through hole to the outside of the flow rate adjusting pipe 1. This scheme sets up the fluid outlet in the second pipe portion can avoid throttling element to remove and cause the interference to fluid flow and pressure to make fluid flow regulation structure more accurate.
Further, the end wall 122 is movably covered on the end opening of the second pipe portion 12. The scheme makes the installation of the throttling element in the flow regulating pipe more convenient.
Further, as shown in fig. 3 and 4, the throttling device further includes a pushing unit 3, the pushing unit 3 includes a ball screw 31 and a speed regulating motor 32, the ball screw 31 includes a screw 311 and a nut 312; the speed regulating motor 32 is in transmission connection with the screw 311, the rod part 22 of the throttling element 2 is fixed on the nut 312, and the rod part 22 is parallel to the screw 311. According to the scheme, the ball screw is arranged, the power of the speed regulating motor can be transmitted to the throttling piece to enable the throttling piece to move horizontally, and the adjustment of fluid flow is achieved by changing the position relation between the head of the throttling piece and the throttling opening.
Further, the speed regulating motor 32 is a stepping motor, a servo motor, a brushless motor or a variable frequency speed regulating motor; the pushing unit 3 further comprises a speed reducing device, the speed reducing device comprises an input end and an output end, and the rotation of the output end is smaller than the rotation speed of the output end; the input end is in transmission connection with the speed regulating motor, and the output end is in transmission connection with the ball screw.
Further, the speed reduction device includes, but is not limited to, a gear reducer, a worm reducer, a cycloid reducer.
In this embodiment, the speed reducer is a gear reducer 33, and the gear reducer 33.
It should be noted that the gear reducer may be a primary gear reducer or a secondary gear reducer. The gear reducer provided by the scheme is simple in structure, low in cost and good in speed reduction effect.
In this embodiment, the gear reducer 33 is a one-stage gear reducer, and includes a first gear 331 and a second gear 332 that are engaged with each other, the first gear 331 is in transmission connection with the ball screw 31, the second gear 332 is in transmission connection with the speed regulating motor 32, and a radius of the first gear 331 is greater than a radius of the second gear 332. This scheme is through setting up reduction gear group for on the power of buncher can pass to ball after slowing down again, thereby make the regulation that promotes throttling element distance more accurate.
Further, the throttling device further comprises a fixing frame 4 for mounting the pushing unit, a fixing hole matched with the rod part 22 of the throttling element 2 is formed in the fixing frame 4, and the rod part 22 penetrates through the fixing hole and then is fixed on the nut 312. The scheme integrates the structure of the throttling device, and is easy to transport, pick and place; in addition, through set up the fixed orifices on the mount, can restrict the nut and carry out circumferential direction along with the screw rod.
Regarding the structure of the flow rate adjusting pipe, as shown in fig. 5, the second embodiment of the present invention discloses a throttling device, which is different from the first embodiment only in that the inner diameters of the first pipe part and the second pipe part of the flow rate adjusting pipe 1 'are the same, the inner wall of the joint of the first pipe part and the second pipe part is annularly provided with a flange, so that a throttling opening 13' is formed inside the flow rate adjusting pipe 1 ', and the radial dimension of the throttling opening 13' is smaller than the radial dimension inside the first pipe part and the second pipe part; the fluid inlet and the fluid outlet 121 'are directly opposite to the restriction 13'.
Referring to fig. 6, a third embodiment of the present invention discloses a flow regulating system, which comprises a throttling device according to any one of the above embodiments, the flow regulating system further comprises a flow sensor 5, a pressure sensor 6 and a microprocessor 7, the flow sensor 5 is used for detecting the flow of the fluid flowing through the flow regulating pipe, the pressure sensor 6 is used for detecting the pressure of the fluid flowing through the flow regulating pipe, the microprocessor is respectively connected with the pressure sensor 5, the flow sensor 6 and the speed regulating motor 32, for receiving the flow data collected by the flow sensor 5, the pressure data collected by the pressure sensor 6, and adjusts the operating parameters of the adjustable speed motor 32 according to the flow data and the pressure data, thereby, the ball screw 31 is driven to translate through the speed reducing device 33, and the automatic adjustment of the fluid flow is realized.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A throttling device is characterized by comprising a flow regulating pipe and a throttling element, wherein the flow regulating pipe comprises a first pipe part and a second pipe part which are communicated with each other, the first pipe part is provided with a fluid inlet, the second pipe part is provided with a fluid outlet, a throttling opening is formed between the inner part of the first pipe part and the inner part of the second pipe part, and the radial size of the throttling opening is smaller than that of the inner part of the first pipe part and/or the second pipe part; the throttling element comprises a head part with a cone structure and a rod part connected with the flat end of the head part, and the radial size of the flat end of the head part and the rod part is smaller than that of the inner part of the first pipe part and/or the second pipe part; when the throttling element is inserted into the flow regulating pipe from the inside of the first pipe part/the second pipe part along the axial direction, the tip end of the head part is over against the throttling opening, the opposite end of the connecting end of the rod part and the head part penetrates out of the flow regulating pipe, the rod part is pushed along the axial direction, and the area size of the throttling opening can be adjusted.
2. The throttle device of claim 1, wherein the first and second pipe portions of the flow regulating pipe have the same inner diameter, and the inner wall of the flow regulating pipe at the junction thereof is provided with a flange to form a throttle opening inside the flow regulating pipe, and the fluid inlet and the fluid outlet are opposite to the throttle opening.
3. The choke device of claim 1, wherein the first pipe section is in abutting engagement with the second pipe section and the first pipe section has an inner diameter less than an inner diameter of the second pipe section such that the choke is formed between the junction of the first pipe section and the second pipe section.
4. The choke device according to claim 3, wherein the fluid inlet is opposite to the choke, and the fluid outlet is provided on a side wall of the second pipe portion; the second pipe part further comprises an end wall facing the throttling opening, a through hole is formed in the end wall, and when the throttling element is arranged inside the second pipe part, the tail end of the rod part of the throttling element penetrates out of the flow regulating pipe through the through hole.
5. A throttle device according to claim 4, characterized in that the end wall flap is provided at the end opening of the second pipe section.
6. The throttle device of claim 1, further comprising a pushing unit including a ball screw including a screw and a nut, and a speed-adjusting motor; the speed regulating motor is a stepping motor, a servo motor, a brushless motor or a variable frequency speed regulating motor, and is in transmission connection with the screw rod, the rod part of the throttling element is fixed on the nut, and the rod part and the screw rod are arranged in parallel.
7. The throttle device of claim 6, wherein the propulsion unit further comprises a reduction device comprising an input end and an output end, the output end rotating at a speed less than the speed of the output end; the input end is in transmission connection with the speed regulating motor, and the output end is in transmission connection with the ball screw.
8. A restriction device according to claim 7, wherein the speed reduction device is a gear reducer.
9. The throttling device according to claim 7, wherein the throttling device further comprises a fixing frame for mounting the pushing unit, a fixing hole matched with the rod part of the throttling element is formed in the fixing frame, and the rod part passes through the fixing hole and then is fixed on the nut.
10. A flow regulating system, comprising the throttling device of any one of claims 1 to 8, further comprising a flow sensor, a pressure sensor and a microprocessor, wherein the flow sensor is configured to detect a flow rate of a fluid flowing through the flow regulating tube, the pressure sensor is configured to detect a pressure of the fluid flowing through the flow regulating tube, and the microprocessor is respectively connected to the pressure sensor, the flow sensor and the speed regulating motor, and is configured to receive flow data collected by the flow sensor and pressure data collected by the pressure sensor, and adjust operating parameters of the speed regulating motor according to the flow data and the pressure data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811199539.9A CN111059290A (en) | 2018-10-16 | 2018-10-16 | Throttling device and flow regulating system with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811199539.9A CN111059290A (en) | 2018-10-16 | 2018-10-16 | Throttling device and flow regulating system with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111059290A true CN111059290A (en) | 2020-04-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811199539.9A Pending CN111059290A (en) | 2018-10-16 | 2018-10-16 | Throttling device and flow regulating system with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111059290A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111946834A (en) * | 2020-07-06 | 2020-11-17 | 西安飞机工业（集团）有限责任公司 | Flow limiting device for controlling flow cross-sectional area of pipeline |
| CN116893697A (en) * | 2023-09-11 | 2023-10-17 | 埃睿迪信息技术（北京）有限公司 | Flow speed adjusting device and method |
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| CN206626251U (en) * | 2017-04-05 | 2017-11-10 | 盐城旭东机械有限公司 | A kind of idle call has the throttle valve gear of shock-absorbing function |
| CN207018546U (en) * | 2017-07-08 | 2018-02-16 | 佛山吉宝信息科技有限公司 | A kind of new motorized needle valve |
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| CN200989448Y (en) * | 2006-09-08 | 2007-12-12 | 高国民 | Servo motor driving plunger valve type automatic controlling water quantity water valve |
| CN201065942Y (en) * | 2007-06-20 | 2008-05-28 | 吴爱国 | Electronic type flow self-balancing electric control valve |
| CN204403392U (en) * | 2015-01-06 | 2015-06-17 | 上海金杨金属表面处理有限公司 | A kind of high precision flow control valve on polypropylene sodium |
| CN204573124U (en) * | 2015-04-30 | 2015-08-19 | 沈庆吉 | A kind of industrial automatic control water-saving valve |
| CN104896116A (en) * | 2015-05-18 | 2015-09-09 | 阮雪红 | Electronic flow valve for controlling oxygen conveyance |
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| CN206626251U (en) * | 2017-04-05 | 2017-11-10 | 盐城旭东机械有限公司 | A kind of idle call has the throttle valve gear of shock-absorbing function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111946834A (en) * | 2020-07-06 | 2020-11-17 | 西安飞机工业（集团）有限责任公司 | Flow limiting device for controlling flow cross-sectional area of pipeline |
| CN116893697A (en) * | 2023-09-11 | 2023-10-17 | 埃睿迪信息技术（北京）有限公司 | Flow speed adjusting device and method |
| CN116893697B (en) * | 2023-09-11 | 2023-12-08 | 埃睿迪信息技术（北京）有限公司 | Flow speed adjusting device and method |
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