CN219201285U - Gas-solid mixed flow introducing mechanism for measuring concentration of space dust - Google Patents
Gas-solid mixed flow introducing mechanism for measuring concentration of space dust Download PDFInfo
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- CN219201285U CN219201285U CN202320047156.XU CN202320047156U CN219201285U CN 219201285 U CN219201285 U CN 219201285U CN 202320047156 U CN202320047156 U CN 202320047156U CN 219201285 U CN219201285 U CN 219201285U
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Abstract
The gas-solid mixed flow introducing mechanism for measuring the concentration of the dust in the space is provided with a jet pipe, an accelerating pipe, a negative pressure pipe, a measuring pipe and a diffusion pipe; the jet pipe comprises an end sealing plate, the center of the end sealing plate is provided with an air source access pipe, and the tail end of the air source access pipe is inserted into the accelerating pipe; the accelerating tube comprises a horizontal section and a contraction section, one end of the horizontal section is connected with an end sealing plate, and the bottom of the horizontal section is connected with the negative pressure tube; the other end of the horizontal section is connected with the contraction section, and the tail end of the contraction section is connected with one end of the measuring tube; the other end of the measuring tube is connected with a diffusion tube, and the upper part of the measuring tube is connected with a measuring interface. The negative pressure pipe is connected at the position of the horizontal section, which is close to the contraction section, and the inner diameter of the upper part of the negative pressure pipe is smaller than the inner diameter of the lower part of the negative pressure pipe. The end of the air source access pipe passes through the negative pressure pipe and extends to the inside of the contraction section. The utility model can make the flow velocity of the gas-solid two-phase flow with dust meet the requirement, reduce the fluctuation during measurement and realize the measurement of the dust concentration in the space environment by the probe type sensor.
Description
Technical Field
The utility model relates to a gas-solid mixed flow introducing mechanism for measuring the concentration of space dust, and belongs to the technical field of dust monitoring.
Background
In the conveying process of the gas-solid two-phase fluid with dust particles, the dust particles are charged due to collision and friction between the dust particles and the inner wall of the pipeline. When the charged dust particles pass through the special measuring electrode, positive and negative charges are induced by the measuring electrode, and the charges form a current signal in the transferring motion; the magnitude of the alternating current signal is proportional to the dust mass content. The electric signal is further amplified and operated, so that the dust concentration is accurately measured.
At present, the measurement of dust in space environment is mainly carried out by an optical method, but optical equipment has high price and small measuring range, and is easy to damage. The main form of the charge method sensor is a probe type, the purpose of measurement can be realized only by frictional contact with charged particles during measurement, and the flow rate of a gas-solid mixed flow is small during measurement of the space dust concentration and cannot reach the speed required by the measurement of the probe type sensor.
Disclosure of Invention
Therefore, the embodiment of the utility model provides a gas-solid mixed flow introducing mechanism for measuring the concentration of space dust, which solves the problems that the flow velocity of the gas-solid mixed flow is smaller and the measurement speed of a probe type sensor cannot be reached during the measurement of the concentration of the space dust.
In order to achieve the above object, the embodiment of the present utility model provides the following technical solutions: the gas-solid mixed flow introducing mechanism for measuring the concentration of the dust in the space comprises a jet pipe, an accelerating pipe, a negative pressure pipe, a measuring pipe and a diffusion pipe;
the jet pipe comprises an end sealing plate, an air source access pipe is arranged in the center of the end sealing plate, and the tail end of the air source access pipe is inserted into the accelerating pipe;
the accelerating tube comprises a horizontal section and a contraction section, one end of the horizontal section is connected with the end sealing plate, and the bottom of the horizontal section is connected with the negative pressure tube; the other end of the horizontal section is connected with the contraction section, and the tail end of the contraction section is connected with one end of the measuring tube;
the other end of the measuring tube is connected with the diffusion tube, and the upper part of the measuring tube is connected with a measuring interface.
As the preferable scheme of the gas-solid mixed flow introducing mechanism for measuring the concentration of the dust in the space, the negative pressure pipe is connected to the horizontal section at a position close to the contraction section, and the inner diameter of the upper part of the negative pressure pipe is smaller than the inner diameter of the lower part of the negative pressure pipe.
As a preferable scheme of the gas-solid mixed flow introducing mechanism for measuring the concentration of the space dust, the tail end of the gas source access pipe passes through the negative pressure pipe and extends to the inside of the contraction section.
As a preferable mode of the space dust concentration measuring gas-solid mixed flow introducing mechanism, a butt flange is formed on the inner side of the end sealing plate, and the butt flange is inserted into the horizontal section.
As a preferable scheme of the gas-solid mixed flow introducing mechanism for measuring the concentration of the space dust, the inner diameter of the diffusion pipe close to one end of the measuring pipe is smaller than the inner diameter of the other end of the diffusion pipe.
As a preferable scheme of the gas-solid mixed flow introducing mechanism for measuring the concentration of the space dust, the measuring interface is connected to one side of the measuring pipe close to the diffusion pipe.
The utility model is provided with a jet pipe, an accelerating pipe, a negative pressure pipe, a measuring pipe and a diffusion pipe; the jet pipe comprises an end sealing plate, the center of the end sealing plate is provided with an air source access pipe, and the tail end of the air source access pipe is inserted into the accelerating pipe; the accelerating tube comprises a horizontal section and a contraction section, one end of the horizontal section is connected with an end sealing plate, and the bottom of the horizontal section is connected with the negative pressure tube; the other end of the horizontal section is connected with the contraction section, and the tail end of the contraction section is connected with one end of the measuring tube; the other end of the measuring tube is connected with a diffusion tube, and the upper part of the measuring tube is connected with a measuring interface. The utility model can make the flow velocity of the gas-solid two-phase flow with dust meet the requirement, reduce the fluctuation during measurement and realize the measurement of the dust concentration in the space environment by the probe type sensor.
Drawings
In order to more clearly illustrate the embodiments of the present utility model 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 will be apparent to those skilled in the art from this disclosure that the drawings described below are merely exemplary and that other embodiments may be derived from the drawings provided without undue effort.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the utility model, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present utility model, should fall within the scope of the utility model.
FIG. 1 is a schematic perspective view of a gas-solid mixed flow introducing mechanism for measuring the concentration of dust in a space provided in an embodiment of the utility model;
FIG. 2 is a schematic top view of a gas-solid mixed flow introducing mechanism for measuring the concentration of dust in space provided in an embodiment of the utility model;
fig. 3 is a schematic cross-sectional view of a gas-solid mixed flow introducing mechanism for measuring the concentration of dust in space provided in an embodiment of the utility model.
In the figure: 1. jet pipe; 2. an accelerating tube; 3. a negative pressure pipe; 4. a measuring tube; 5. a diffusion tube; 6. an end sealing plate; 7. an air source access pipe; 8. a horizontal section; 9. a constriction section; 10. a measurement interface; 11. and (5) abutting the flange.
Detailed Description
Other advantages and advantages of the present utility model will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. 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.
Referring to fig. 1, 2 and 3, an embodiment of the present utility model provides a gas-solid mixed flow introducing mechanism for measuring concentration of dust in a space, which comprises a jet pipe 1, an accelerating pipe 2, a negative pressure pipe 3, a measuring pipe 4 and a diffusion pipe 5;
the jet pipe 1 comprises an end sealing plate 6, an air source access pipe 7 is arranged in the center of the end sealing plate 6, and the tail end of the air source access pipe 7 is inserted into the accelerating pipe 2;
the accelerating tube 2 comprises a horizontal section 8 and a contraction section 9, one end of the horizontal section 8 is connected with the end sealing plate 6, and the bottom of the horizontal section 8 is connected with the negative pressure tube 3; the other end of the horizontal section 8 is connected with the contraction section 9, and the tail end of the contraction section 9 is connected with one end of the measuring tube 4;
the other end of the measuring tube 4 is connected with the diffusion tube 5, and the upper part of the measuring tube 4 is connected with a measuring interface 10.
In this embodiment, the negative pressure pipe 3 is connected to the horizontal section 8 near the contraction section 9, and the inner diameter of the upper part of the negative pressure pipe 3 is smaller than the inner diameter of the lower part of the negative pressure pipe 3; the end of the air supply inlet pipe 7 passes through the negative pressure pipe 3 and extends into the interior of the constriction 9.
Specifically, the probe type dust concentration sensor has certain requirements on the flow rate of the gas-solid two-phase flow with dust, and when the flow rate is less than 5 meters/s, the measured fluctuation is very large. The external air source passes through the air source access pipe 7, and the air source access pipe 7 is established in the inside cavity of accelerating tube 2, forms the negative pressure near the negative pressure pipe 3 interface under the effect of high-speed air current to inhale the air of space environment's area dust, along with high-speed air current entering survey buret 4, survey buret 4's measurement interface 10 department installation probe dust concentration sensor detects the size of dust concentration.
In this embodiment, a butt flange 11 is formed on the inner side of the end seal plate 6, and the butt flange 11 is inserted into the horizontal section 8.
Specifically, the contact area of the interface position of the jet pipe 1 and the accelerating pipe 2 is increased by the butt flange 11, so that air flow is prevented from leaking at the interface position of the jet pipe 1 and the accelerating pipe 2, negative pressure is formed near the interface of the negative pressure pipe 3 under the action of high-speed air flow, and air with dust in the space environment is sucked.
In this embodiment, the inner diameter of the diffusion tube 5 near one end of the measurement tube 4 is smaller than the inner diameter of the other end of the diffusion tube 5; the measuring port 10 is connected to the measuring tube 4 on the side close to the diffuser 5.
Specifically, the accelerating tube 2 accelerates the gas-solid two-phase flow, and is discharged from the diffuser tube 5 with gradually enlarged diameter after being measured by the measuring tube 4. And the position of the measuring interface 10 is relatively close to the diffusion pipe 5, an accelerating path is reserved for the gas-solid two-phase flow, the dust gas in the space is sucked by an external gas source, and the gas is accelerated, so that the speed required by the measurement of the probe type sensor is reached.
In summary, the present utility model is provided with a jet pipe 1, an accelerating pipe 2, a negative pressure pipe 3, a measuring pipe 4 and a diffusion pipe 5; the jet pipe 1 comprises an end sealing plate 6, an air source access pipe 7 is arranged in the center of the end sealing plate 6, and the tail end of the air source access pipe 7 is inserted into the accelerating pipe 2; the accelerating tube 2 comprises a horizontal section 8 and a contraction section 9, one end of the horizontal section 8 is connected with an end sealing plate 6, and the bottom of the horizontal section 8 is connected with the negative pressure tube 3; the other end of the horizontal section 8 is connected with a contraction section 9, and the tail end of the contraction section 9 is connected with one end of the measuring tube 4; the other end of the measuring tube 4 is connected with a diffusion tube 5, and the upper part of the measuring tube 4 is connected with a measuring interface 10. The probe type dust concentration sensor has certain requirements on the flow rate of the gas-solid two-phase flow with dust, and when the flow rate is less than 5 meters/s, the measured fluctuation is very large. The external air source passes through the air source access pipe 7, and the air source access pipe 7 is established in the inside cavity of accelerating tube 2, forms the negative pressure near the negative pressure pipe 3 interface under the effect of high-speed air current to inhale the air of space environment's area dust, along with high-speed air current entering survey buret 4, survey buret 4's measurement interface 10 department installation probe dust concentration sensor detects the size of dust concentration. The butt flange 11 increases the contact area of the interface position of the jet pipe 1 and the accelerating pipe 2, and prevents air flow from leaking at the interface position of the jet pipe 1 and the accelerating pipe 2, so that negative pressure is formed near the interface of the negative pressure pipe 3 under the action of high-speed air flow, and dust-bearing air in the space environment is sucked. The accelerating tube 2 accelerates the gas-solid two-phase flow, and is discharged from the diffuser tube 5 with gradually enlarged caliber after being measured by the measuring tube 4. And the position of the measuring interface 10 is relatively close to the diffusion pipe 5, an accelerating path is reserved for the gas-solid two-phase flow, the dust gas in the space is sucked by an external gas source, and the gas is accelerated, so that the speed required by the measurement of the probe type sensor is reached. The utility model can make the flow velocity of the gas-solid two-phase flow with dust meet the requirement, reduce the fluctuation during measurement and realize the measurement of the dust concentration in the space environment by the probe type sensor.
While the utility model has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the utility model and are intended to be within the scope of the utility model as claimed.
Claims (6)
1. The gas-solid mixed flow introducing mechanism for measuring the concentration of the dust in the space is characterized by comprising a jet pipe (1), an accelerating pipe (2), a negative pressure pipe (3), a measuring pipe (4) and a diffusion pipe (5);
the jet pipe (1) comprises an end sealing plate (6), an air source access pipe (7) is arranged in the center of the end sealing plate (6), and the tail end of the air source access pipe (7) is inserted into the accelerating pipe (2);
the accelerating tube (2) comprises a horizontal section (8) and a contraction section (9), one end of the horizontal section (8) is connected with the end sealing plate (6), and the bottom of the horizontal section (8) is connected with the negative pressure tube (3); the other end of the horizontal section (8) is connected with the contraction section (9), and the tail end of the contraction section (9) is connected with one end of the measuring tube (4);
the other end of the measuring tube (4) is connected with the diffusion tube (5), and the upper part of the measuring tube (4) is connected with a measuring interface (10).
2. A gas-solid mixed flow introducing mechanism for measuring the concentration of dust in space according to claim 1, wherein the negative pressure pipe (3) is connected to the horizontal section (8) at a position close to the contraction section (9), and the inner diameter of the upper part of the negative pressure pipe (3) is smaller than the inner diameter of the lower part of the negative pressure pipe (3).
3. A gas-solid mixed flow introduction mechanism for measuring concentration of dust in space according to claim 2, characterized in that the end of the gas source access pipe (7) passes through the negative pressure pipe (3) and extends to the inside of the constriction section (9).
4. A gas-solid mixed flow introducing mechanism for measuring concentration of dust in space according to claim 3, wherein a butt flange (11) is formed on the inner side of said end seal plate (6), and said butt flange (11) is inserted into the inside of said horizontal section (8).
5. A gas-solid mixed flow introducing mechanism for measuring the concentration of dust in a space according to claim 4, wherein the inner diameter of said diffuser pipe (5) near one end of said measuring pipe (4) is smaller than the inner diameter of the other end of said diffuser pipe (5).
6. A gas-solid mixed flow introduction mechanism for measuring concentration of dust in space according to claim 4, characterized in that the measuring interface (10) is connected to the side of the measuring tube (4) close to the diffuser tube (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320047156.XU CN219201285U (en) | 2023-01-07 | 2023-01-07 | Gas-solid mixed flow introducing mechanism for measuring concentration of space dust |
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| CN202320047156.XU CN219201285U (en) | 2023-01-07 | 2023-01-07 | Gas-solid mixed flow introducing mechanism for measuring concentration of space dust |
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| CN219201285U true CN219201285U (en) | 2023-06-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117705665A (en) * | 2024-02-05 | 2024-03-15 | 中国科学技术大学 | Optical fiber probe, measuring device and measuring method for capturing concentration change of jet flow particles |
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2023
- 2023-01-07 CN CN202320047156.XU patent/CN219201285U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117705665A (en) * | 2024-02-05 | 2024-03-15 | 中国科学技术大学 | Optical fiber probe, measuring device and measuring method for capturing concentration change of jet flow particles |
| CN117705665B (en) * | 2024-02-05 | 2024-04-30 | 中国科学技术大学 | Optical fiber probe, measuring device and measuring method for capturing concentration change of jet flow particles |
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