CN218724384U - Low-flow-speed air quantity measuring sensor used for flowing from bottom to top - Google Patents
Low-flow-speed air quantity measuring sensor used for flowing from bottom to top Download PDFInfo
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- CN218724384U CN218724384U CN202222927953.5U CN202222927953U CN218724384U CN 218724384 U CN218724384 U CN 218724384U CN 202222927953 U CN202222927953 U CN 202222927953U CN 218724384 U CN218724384 U CN 218724384U
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Abstract
The utility model discloses a low flow rate amount of wind measurement sensor for from bottom to top flow direction, including outer tube and inner tube, the internal diameter of the middle part terminal surface of outer tube is less than the internal diameter of the top terminal surface and the bottom terminal surface of outer tube, the inner tube is located the outer tube inner wall, the outer tube includes first cylinder connecting pipe, first vertebra shape connecting pipe and second vertebra shape connecting pipe, the inner tube includes second cylinder connecting pipe, third vertebra shape connecting pipe, third cylinder connecting pipe and fourth vertebra shape connecting pipe, the bottom terminal surface internal diameter of fourth vertebra shape connecting pipe is less than the internal diameter of fourth vertebra shape connecting pipe top terminal surface, third vertebra shape connecting pipe top terminal surface internal diameter is less than the internal diameter of third vertebra shape connecting pipe bottom terminal surface, be provided with first sampling tube and second sampling tube in the inner tube, the axis of first sampling tube and second sampling tube all is 30 ~ 70 contained angles with the vertical direction of inner tube. The utility model discloses the realization is high to the low velocity of flow amount of wind of flow from bottom to top measurement accuracy, the operation of being convenient for.
Description
Technical Field
The utility model belongs to the technical field of the low velocity of flow air measurement sensor, concretely relates to a low velocity of flow air measurement sensor for from bottom to top flow direction.
Background
The low flow rate air quantity measuring sensor is mainly used for detecting low wind speed and low air quantity of various underground tunnels, air ports, pipelines and coal-fired boilers of thermal power plants in coal mines so as to ensure safe production, mainly comprises a positive pressure sampling pipe and a negative pressure sampling pipe, and is based on a differential pressure measuring principle, a measuring device is arranged on the pipelines, a probe of the measuring device is connected with the positive pressure sampling pipe and the negative pressure sampling pipe, when airflow flows in the pipelines, a windward side is impacted by the airflow, kinetic energy of the airflow is converted into pressure energy, so that the pressure in the windward side is called total pressure, the leeward side is not impacted by the airflow, the pressure in the windward side is static pressure in the windpipe and the pressure in the windpipe is called static pressure, the difference between the total pressure and the static pressure is called dynamic pressure, the size of the windward side is related to the wind speed in the pipelines, and the larger the dynamic pressure is; the wind speed is small, and the dynamic pressure is also small, so that the wind speed in the pipe can be accurately measured only by measuring the dynamic pressure and finding out the corresponding relation between the dynamic pressure and the wind speed.
When the low-flow-velocity wind speed sensor in the prior art measures low-flow-velocity wind quantity flowing from bottom to top, wind speed is not collected intensively, and measurement accuracy is low.
Therefore, in view of the above technical problems, it is necessary to provide a low flow rate air volume measuring sensor for a bottom-up flow.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a low velocity of flow amount of wind measuring transducer for flowing to from bottom to top to solve foretell problem.
In order to achieve the above object, an embodiment of the present invention provides the following technical solutions:
a low-flow-speed air quantity measuring sensor for flowing from bottom to top comprises an outer pipe and an inner pipe, wherein the inner diameter of the middle end face of the outer pipe is smaller than the inner diameters of the top end face and the bottom end face of the outer pipe, and the inner pipe is positioned on the inner wall of the outer pipe;
the outer tube includes first cylinder connecting pipe, first vertebra shape connecting pipe and second vertebra shape connecting pipe, the inner tube includes second cylinder connecting pipe, third vertebra shape connecting pipe, third cylinder connecting pipe and fourth vertebra shape connecting pipe, the bottom terminal surface internal diameter of fourth vertebra shape connecting pipe is less than the internal diameter of fourth vertebra shape connecting pipe top terminal surface, third vertebra shape connecting pipe top terminal surface internal diameter is less than the internal diameter of third vertebra shape connecting pipe bottom terminal surface, be provided with first sampling pipe and second sampling pipe in the inner tube, first sampling pipe and second cylinder connecting pipe outside end face fixed connection, first sampling pipe and second sampling pipe all run through the lateral wall terminal surface of outer tube, second sampling pipe and third cylinder connecting pipe outside terminal surface fixed connection, the axis of first sampling pipe and second sampling pipe all is 30 ~ 70 contained angles with the vertical direction of inner tube.
As a further improvement, the first protection casing of first sampling outside of tubes end face fixedly connected with, the second protection casing of second sampling outside of tubes end face fixedly connected with.
As a further improvement, the first dead lever of first sampling pipe inner wall upper portion terminal surface fixedly connected with, a pair of relative terminal surface of first dead lever all with first sampling pipe inner wall fixed connection, the first link piece of terminal surface fixedly connected with under the first dead lever, be connected with first anti-blocking pendulum stick on the first link piece.
As a further improvement, second sampling pipe inner wall upper portion terminal surface fixedly connected with second dead lever, a pair of relative terminal surface of second dead lever all with second sampling pipe inner wall fixed connection, terminal surface fixedly connected with second link spare under the second dead lever, be connected with the second on the second link spare and prevent stifled pendulum stick.
As a further improvement, the second prevents that stifled pendulum stick bottom terminal surface is located the third cylinder connecting pipe, first prevents that stifled pendulum stick bottom terminal surface is located the second cylinder connecting pipe.
As a further improvement, a fixing piece is fixedly connected between the end face of one side of the inner wall of the first cylinder connecting pipe and the end face of one outer side of the second cylinder connecting pipe.
As a further improvement, a plurality of stationary dogs of fixedly connected with between first vertebra shape connecting tube inner wall terminal surface and the fourth vertebra shape connecting tube outside end face, it is a plurality of angular distribution such as stationary dog.
Compared with the prior art, the utility model has the advantages of it is following:
the utility model discloses the realization is high to the low velocity of flow amount of wind that flows from bottom to top, and the structure connects simply, the operation of being convenient for.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a low flow rate and air volume measuring sensor for a bottom-up flow direction according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of a low flow rate and air volume measuring sensor for a bottom-up flow direction according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a position a in fig. 2 according to an embodiment of the present invention.
In the figure: 1. the anti-blocking device comprises an outer pipe, 101, a first cylindrical connecting pipe, 102, a first conical connecting pipe, 103, a second conical connecting pipe, 2, an inner pipe, 201, a second cylindrical connecting pipe, 202, a third conical connecting pipe, 203, a third cylindrical connecting pipe, 204, a fourth conical connecting pipe, 3, a first sampling pipe, 301, a first protective cover, 302, a first anti-blocking swing rod, 303, a first hanging piece, 304, a first fixing rod, 4, a second sampling pipe, 401, a second protective cover, 402, a second anti-blocking swing rod, 403, a second hanging piece, 404, a second fixing rod, 5, a fixing piece and 6 fixing claws.
Detailed Description
The present invention will be described in detail below with reference to embodiments shown in the drawings. However, the present invention is not limited to the embodiments, and those skilled in the art can implement the embodiments according to the present invention
Structural, methodological, or functional changes may be made without departing from the scope of the invention.
An embodiment of the utility model discloses a low velocity of flow amount measurement sensor for flowing to from bottom to top, it is shown with reference to fig. 1 ~ 2, including outer tube 1 and inner tube 2, inner tube 2 is located 1 inner wall of outer tube, and outer tube 1 and inner tube 2 are hollow structure, and outer tube 1 includes first cylinder connecting pipe 101, first vertebra shape connecting pipe 102 and second vertebra shape connecting pipe 103, and inner tube 2 includes second cylinder connecting pipe 201, third vertebra shape connecting pipe 202, third cylinder connecting pipe 203 and fourth vertebra shape connecting pipe 204.
Referring to fig. 1 to 2, the upper end surface of the first cylindrical connecting pipe 101 is fixedly connected with the first tapered connecting pipe 102, the upper end surface of the first tapered connecting pipe 102 is fixedly connected with the second tapered connecting pipe 103, the upper end surface of the second cylindrical connecting pipe 201 is fixedly connected with the third tapered connecting pipe 202, the upper end surface of the third tapered connecting pipe 202 is fixedly connected with the third cylindrical connecting pipe 203, the upper end surface of the third cylindrical connecting pipe 203 is fixedly connected with the fourth tapered connecting pipe 204, the upper end surface of the fourth tapered connecting pipe 204 is located on the upper end surface of the first tapered connecting pipe 102, the distance from the fourth tapered connecting pipe 204 to the second tapered connecting pipe 103 is 3-5cm, the lower end surface of the third tapered connecting pipe 202 is located in the first cylindrical connecting pipe 101, the inner diameter of the middle end surface of the outer pipe 1 is smaller than the inner diameters of the top end surface and the bottom end surface of the outer pipe 1, the inner diameter of the bottom end surface of the fourth tapered connecting pipe 204 is smaller than the inner diameter of the top end surface of the fourth tapered connecting pipe 204, the top end surface of the third tapered connecting pipe 202 is smaller than the inner diameter of the bottom end surface of the top end surface of the bottom tapered connecting pipe 202, the second tapered connecting pipe 201, the first cylindrical connecting pipe 201 protrudes upward, the cylindrical connecting pipe 101, the flow rate of the cylindrical connecting pipe 101 is increased, and the cylindrical connecting pipe, the flow rate of the cylindrical connecting pipe, the cylindrical connecting pipe 101 is increased, and the flow rate measuring device for the low flow rate measuring device for the high flow rate measuring device.
Specifically, the air volume measuring transducer generally requires the velocity of flow more than 8 meters per second in the conventional pipeline of prior art, otherwise signal stability is poor, the linearity is low, the utility model discloses the realization can be at more than 5 meters per second accurate measurement, and differential pressure signal is 7 ~ 9 times of standard pitot tube.
Referring to fig. 1 to 2, a first sampling tube 3 and a second sampling tube 4 are arranged in an inner tube 2, the second sampling tube 4 is located on the upper end face of the first sampling tube 3, the first sampling tube 3 is fixedly connected with the outer end face of a second cylindrical connecting tube 201, the second sampling tube 4 is fixedly connected with the outer end face of a third cylindrical connecting tube 203, the first sampling tube 3 and the second sampling tube 4 both penetrate through the side wall end face of an outer tube 1, the second sampling tube 4 is communicated with the third cylindrical connecting tube 203, the first sampling tube 3 is communicated with the second cylindrical connecting tube 201, so that the ends of the first sampling tube 3 and the second sampling tube 4 far away from the outer tube 1 need to be connected with probes of corresponding measuring devices, the first sampling tube 3 can adopt positive pressure of air flow, the second sampling tube 4 can adopt negative pressure of air flow,
the measurement of the low flow rate and the air quantity flowing from bottom to top in the outer pipe 1 and the inner pipe 2 is achieved, and the measurement precision is high.
Referring to fig. 2 to 3, a first fixing rod 304 is fixedly connected to an upper end surface of an inner wall of the first sampling tube 3, a pair of opposite end surfaces of the first fixing rod 304 are fixedly connected to the inner wall of the first sampling tube 3, a first hanging piece 303 is fixedly connected to a lower end surface of the first fixing rod 304, and a first anti-blocking swing rod 302 is connected to the first hanging piece 303, that is, the first anti-blocking swing rod 302 is hung on the first hanging piece 303, and the first anti-blocking swing rod 302 can swing irregularly on the first hanging piece 303.
Referring to fig. 2 to 3, a second fixing rod 404 is fixedly connected to an upper end surface of an inner wall of the second sampling tube 4, a pair of opposite end surfaces of the second fixing rod 404 are fixedly connected to the inner wall of the second sampling tube 4, a second hanging member 403 is fixedly connected to a lower end surface of the second fixing rod 404, and a second anti-blocking swing rod 402 is connected to the second hanging member 403, that is, the second anti-blocking swing rod 402 is hung on the second hanging member 403, and the second anti-blocking swing rod 402 can swing irregularly on the second hanging member 403.
Referring to fig. 2 to 3, the central axes of the first sampling tube 3 and the second sampling tube 4 are both at an included angle of 30 to 70 degrees with the vertical direction of the inner tube 2, preferably, the included angle is 45 degrees, that is, the first sampling tube 3 and the second sampling tube 4 are obliquely inserted on the inner tube 2, the bottom end face of the second anti-blocking pendulum rod 402 is located in the third cylindrical connecting tube 203, the bottom end face of the first anti-blocking pendulum rod 302 is located in the second cylindrical connecting tube 201, specifically, the first sampling tube 3 and the second sampling tube 4 are obliquely inserted and connected with the outer tube 1 and the inner tube 2, the positive pressure of the airflow can be taken by the first sampling tube 3, the negative pressure of the airflow can be taken by the second sampling tube 4, the pressure taking ports in the first sampling tube 3 and the second sampling tube 4 face away from the airflow, the first pendulum rod 302 and the second anti-blocking pendulum rod 402 in the first sampling tube 3 and the second sampling tube 4 have irregular swinging due to the airflow flowing, and anti-blocking function in the first sampling tube 3 and the second sampling tube 4 is realized.
Concretely, to coal fired boiler of thermal power factory, dust in the air such as pipeline, when carrying out the amount of wind measurement in the more environment of piece, long-time use, dust in the air, the piece is easily piled up in first sampling pipe 3 and second sampling pipe 4, cause first sampling pipe 3 and second sampling pipe 4 to block up, lead to the unable normal use of first sampling pipe 3 and second sampling pipe 4, through first stifled pendulum stick 302 and first hitching member 303 of preventing, the second prevents mutually supporting of stifled pendulum stick 402 and second hitching member 403, realize when getting into the air current in first sampling pipe 3 and second sampling pipe 4, the air current can drive first stifled pendulum stick 302 of preventing and second prevents stifled pendulum stick 402 and carry out irregular swing, reach the dust with first sampling pipe 3 and second sampling pipe 4 inner wall terminal surfaces, piece etc. shake the time of piece, use
Fall, and then blown away by the air current, realize the automatic mediation to first sampling pipe 3 and second sampling pipe 4, effectually avoided in first sampling pipe 3 and the second sampling pipe 4 by the dust in the air, piece etc. block up, can keep unobstructed in first sampling pipe 3 and the second sampling pipe 4 throughout, realized first sampling pipe 3 and second sampling pipe 4 prevent blockking up the function, guaranteed first sampling pipe 3 and second sampling pipe 4's normal use.
Referring to fig. 1 to 2, the first protective cover 301 is fixedly connected to the outer end face of the first sampling tube 3, and the second protective cover 401 is fixedly connected to the outer end face of the second sampling tube 4, so that the first sampling tube 3 and the second sampling tube 4 are protected from the outer end faces of the first sampling tube 3 and the second sampling tube 4, and the first sampling tube 3 and the second sampling tube 4 are not easily impacted by wind and sand in the air, so that the first sampling tube 3 and the second sampling tube 4 are damaged and cannot be normally used.
Specifically, as shown in fig. 1, when measuring the low flow rate and the air volume in the environment where the wind and the sand are more in the air such as a coal-fired boiler of a thermal power plant and a pipeline, the wind and the sand in the air impact the external end surfaces of the first sampling tube 3 and the second sampling tube 4 for a long time, scratch is easily caused on the external end surfaces of the first sampling tube 3 and the second sampling tube 4, and the first sampling tube 3 and the second sampling tube 4 cannot be normally used, and the first sampling tube 3 and the second sampling tube 4 cannot be damaged and cannot be normally used due to the fact that the external end surfaces of the first sampling tube 3 and the second sampling tube 4 are not easily impacted by the wind and the sand in the air through the first protective cover 301 and the second protective cover 401.
Referring to fig. 2 to 3, a fixing piece 5 is fixedly connected between an end surface of one side of the inner wall of the first cylindrical connecting pipe 101 and an end surface of one side of the outer wall of the second cylindrical connecting pipe 201, one end surface of the fixing piece 5 is fixedly connected with the second cylindrical connecting pipe 201, and the opposite end surface of the other side of the fixing piece 5 is fixedly connected with the first cylindrical connecting pipe 101, so that the inner pipe 2 is fixed on the end surface of the inner wall of the outer pipe 1, and the inner pipe 2 is not easy to move.
Referring to fig. 2 to 3, a plurality of fixing claws 6 are fixedly connected between the end surface of the inner wall of the first tapered connecting pipe 102 and the end surface of the outer side of the fourth tapered connecting pipe 204, and preferably, the number of the fixing claws 6 is 4, and the plurality of fixing claws 6 are equally angularly distributed, thereby reinforcing the inner wall of the outer pipe 1 to fix the inner pipe 2 thereto.
When the device is used, referring to fig. 1, when low-flow-rate wind flowing from bottom to top passes through the outer pipe 1, one ends, far away from the outer pipe 1, of the first sampling pipe 3 and the second sampling pipe 4 are connected with probes of corresponding measuring devices, the first sampling pipe 3 can adopt positive pressure of airflow, the second sampling pipe 4 can adopt negative pressure of the airflow, the low-flow-rate wind flowing from bottom to top through the outer pipe 1 and the inner pipe 2 is measured, and finally related data of the airflow can be obtained;
when getting into the air current in first sampling pipe 3 and second sampling pipe 4, the air current can drive first stifled pendulum stick 302 and the second prevents stifled pendulum stick 402 and carries out irregular swing, reach the dust with first sampling pipe 3 and 4 inner wall terminal surfaces of second sampling pipe, piece etc. shake and fall, and then blown away by the air current, realize the automatic mediation to in first sampling pipe 3 and the second sampling pipe 4, the effectual dust of having avoided first sampling pipe 3 and second sampling pipe 4 in by the air, piece etc. block up, can keep unobstructed in first sampling pipe 3 and the second sampling pipe 4 all the time, the function of preventing blockking up of first sampling pipe 3 and second sampling pipe 4 has been realized, the normal use of first sampling pipe 3 and second sampling pipe 4 has been guaranteed.
According to the technical scheme provided by the utility model, the utility model discloses following beneficial effect has:
the utility model discloses the realization is high to the low velocity of flow amount of wind that flows from bottom to top, and the structure connects simply, the operation of being convenient for.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. The sensor is characterized by comprising an outer pipe and an inner pipe, wherein the inner diameter of the middle end face of the outer pipe is smaller than the inner diameters of the top end face and the bottom end face of the outer pipe, and the inner pipe is positioned on the inner wall of the outer pipe;
the outer tube includes first cylinder connecting pipe, first vertebra shape connecting pipe and second vertebra shape connecting pipe, the inner tube includes second cylinder connecting pipe, third vertebra shape connecting pipe, third cylinder connecting pipe and fourth vertebra shape connecting pipe, the bottom terminal surface internal diameter of fourth vertebra shape connecting pipe is less than the internal diameter of fourth vertebra shape connecting pipe top terminal surface, third vertebra shape connecting pipe top terminal surface internal diameter is less than the internal diameter of third vertebra shape connecting pipe bottom terminal surface, be provided with first sampling pipe and second sampling pipe in the inner tube, the axis of first sampling pipe and second sampling pipe all is 30 ~ 70 contained angles with the vertical direction of inner tube.
2. The sensor according to claim 1, wherein a first shield is fixedly connected to an outer end surface of the first sampling tube, and a second shield is fixedly connected to an outer end surface of the second sampling tube.
3. The sensor according to claim 2, wherein a first fixing rod is fixedly connected to an upper end surface of an inner wall of the first sampling tube, a pair of opposite end surfaces of the first fixing rod are fixedly connected to the inner wall of the first sampling tube, a first hanging member is fixedly connected to a lower end surface of the first fixing rod, and a first anti-blocking swing rod is connected to the first hanging member.
4. The sensor according to claim 2, wherein a second fixing rod is fixedly connected to an upper end surface of an inner wall of the second sampling tube, a pair of opposite end surfaces of the second fixing rod are fixedly connected to the inner wall of the second sampling tube, a second hanging member is fixedly connected to a lower end surface of the second fixing rod, and a second anti-blocking swing rod is connected to the second hanging member.
5. The sensor for measuring the low-flow-rate and air-volume flowing from bottom to top as claimed in claim 4, wherein the bottom end face of the second anti-blocking swing rod is positioned in the third cylindrical connecting pipe, and the bottom end face of the first anti-blocking swing rod is positioned in the second cylindrical connecting pipe.
6. The sensor according to claim 1, wherein a fixing plate is fixedly connected between an end surface of one side of the inner wall of the first cylindrical connecting pipe and an end surface of one side of the outer wall of the second cylindrical connecting pipe.
7. The sensor according to claim 1, wherein a plurality of fixing claws are fixedly connected between the inner wall surface of the first tapered connecting pipe and the outer side end surface of the fourth tapered connecting pipe, and the plurality of fixing claws are distributed at equal angles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222927953.5U CN218724384U (en) | 2022-11-03 | 2022-11-03 | Low-flow-speed air quantity measuring sensor used for flowing from bottom to top |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222927953.5U CN218724384U (en) | 2022-11-03 | 2022-11-03 | Low-flow-speed air quantity measuring sensor used for flowing from bottom to top |
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| Publication Number | Publication Date |
|---|---|
| CN218724384U true CN218724384U (en) | 2023-03-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222927953.5U Active CN218724384U (en) | 2022-11-03 | 2022-11-03 | Low-flow-speed air quantity measuring sensor used for flowing from bottom to top |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218724384U (en) |
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2022
- 2022-11-03 CN CN202222927953.5U patent/CN218724384U/en active Active
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