CN219369009U - Bidirectional dynamic pressure detection sensor system and sampling device thereof - Google Patents
Bidirectional dynamic pressure detection sensor system and sampling device thereof Download PDFInfo
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- CN219369009U CN219369009U CN202223272417.2U CN202223272417U CN219369009U CN 219369009 U CN219369009 U CN 219369009U CN 202223272417 U CN202223272417 U CN 202223272417U CN 219369009 U CN219369009 U CN 219369009U
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Abstract
The utility model discloses a sampling device for a bidirectional dynamic pressure detection sensor, which relates to the technical field of structural design of sensor sampling components, and comprises a sampling mechanism and a connecting mechanism, wherein the sampling mechanism can be rotationally connected with the sensor through the connecting mechanism; the connecting mechanism can be used for communicating the pressure measuring unit of the sensor with the pressure measuring end of the sampling mechanism, and can enable the sensor to rotate around the central shaft of the sampling mechanism, when in measurement, the sensor can be rotated to adjust the angle of the display window of the sensor under the condition that the measuring direction is unchanged, so that the sampling device and the sensor can relatively rotate without influencing the measuring direction, and the measuring precision is ensured; the utility model also discloses a bidirectional dynamic pressure detection sensor system, which comprises the bidirectional dynamic pressure detection sensor and the sampling device for the bidirectional dynamic pressure detection sensor, wherein the sampling device for the bidirectional dynamic pressure detection sensor is arranged on the bidirectional dynamic pressure detection sensor.
Description
Technical Field
The utility model relates to the technical field of structural design of sensor sampling components, in particular to a bidirectional dynamic pressure detection sensor system and a sampling device thereof.
Background
The bidirectional dynamic pressure detection sensor can realize measurement of bidirectional static pressure, positive pressure, negative pressure and differential pressure based on the differential pressure principle, and the structure with the epithelial tube can also realize measurement of flow velocity and flow of fluid in two directions, thus being an ideal instrument for heating and ventilation tests of various environmental monitoring stations, factories, mines and buildings.
The bidirectional dynamic pressure detection sensor mainly comprises a sensor shell, a main control circuit board, a pressure measurement element and a sampling device, wherein one end of the sampling device is fixed on the sensor shell and is connected with the pressure measurement element; the other end is in the measuring environment. Based on the actual engineering environment requirement, the central axes of the sampling ports in the forward and reverse directions of the sampling device are parallel to the measured pipeline, and the sensor display window is required to adapt to the rotation adjustment of the actual working condition environment so as to be convenient for observation and maintenance; the existing sensor and the sampling device are fixed in direction and cannot meet the requirement of rotation adjustment according to the on-site working condition.
Disclosure of Invention
The utility model aims to provide a bidirectional dynamic pressure detection sensor system and a sampling device thereof, which are used for solving the problems in the prior art, enabling the sampling device and a sensor to rotate relatively, not affecting the measurement direction and ensuring the measurement precision.
In order to achieve the above object, the present utility model provides the following solutions:
the utility model provides a sampling device for a bidirectional dynamic pressure detection sensor, which comprises a sampling mechanism, wherein one end of the sampling mechanism is a sampling end and is used for being placed into an airflow to be detected, the other end of the sampling mechanism is a pressure measuring end and is used for being connected with a pressure measuring unit of the sensor, and the sampling mechanism is a bidirectional sampling mechanism; the sampling mechanism can be rotationally connected with the sensor through the connecting mechanism; the connecting mechanism can be used for communicating the pressure measuring unit of the sensor with the pressure measuring end of the sampling mechanism and enabling the sensor to rotate around the central shaft of the sampling mechanism.
Preferably, one end of the connecting mechanism is a first mounting end and is used for being fixedly connected with the sensor, and the other end of the connecting mechanism is a second mounting end and is used for being rotationally connected with the sampling mechanism.
Preferably, the connecting mechanism comprises a connecting seat, a fastener and a rotating piece; the connecting seat is of a hollow structure with upper and lower openings, the upper end of the connecting seat is the first mounting end, the upper end opening of the connecting seat is used for being connected with a pressure measuring unit of the sensor, the lower end of the connecting seat is the second mounting end, and the lower end opening of the connecting seat is used for being connected with a pressure measuring end of the sampling mechanism; the fastener is sleeved on the outer side of the bottom of the connecting seat, a rotary gap is reserved between the bottom of the fastener and the lower end of the connecting seat, and the rotary piece is rotatably arranged in the rotary gap; the bottom of fastener has seted up the through-hole, sampling mechanism's pressure measurement end can pass from bottom to top in proper order the through-hole with the lower extreme opening of connecting seat, and with rotating member fixed connection.
Preferably, the connecting seat is cylindrical, the rotating member is annular, and the outer diameter of the rotating member is larger than the inner diameter of the lower end opening of the connecting seat.
Preferably, the lower extreme of connecting seat is provided with spacing arch, the top of rotating member is provided with the guide way, spacing arch with the guide way phase-match, the route of guide way is non-closed circular.
Preferably, the fastener is a thread bush, the thread bush is provided with an internal thread, the diameter of the through hole is smaller than the inner diameter of the thread bush, and the outer side of the bottom of the connecting seat is provided with an external thread matched with the internal thread of the thread bush.
Preferably, an annular flange is circumferentially arranged on the outer wall of the connecting seat, and the bottom of the annular flange can abut against the top of the threaded sleeve.
Preferably, the sampling end of the sampling mechanism is of an S-shaped pitot tube structure.
The utility model also provides a bidirectional dynamic pressure detection sensor system, which comprises the bidirectional dynamic pressure detection sensor and the sampling device for the bidirectional dynamic pressure detection sensor, wherein the sampling device for the bidirectional dynamic pressure detection sensor is arranged on the bidirectional dynamic pressure detection sensor.
Preferably, a mounting hole is formed in the bottom of the bidirectional dynamic pressure detection sensor, and the upper end of the connecting mechanism is detachably and fixedly connected in the mounting hole; the upper end of the connecting mechanism is provided with a limiting deviation opening, and the mounting hole is matched with the limiting deviation opening.
Compared with the prior art, the utility model has the following technical effects:
the sampling device for the bidirectional dynamic pressure detection sensor comprises a sampling mechanism and a connecting mechanism, wherein the sampling mechanism is the bidirectional sampling mechanism, the connecting mechanism can communicate a pressure measurement unit of the sensor with a pressure measurement end of the sampling mechanism, and can enable the sensor to rotate around a central shaft of the sampling mechanism, when the sampling end of the sampling mechanism is used for measuring, the sensor can be rotated according to the actual working condition requirement under the condition that the measuring direction of the sampling end of the sampling mechanism in an airflow to be detected is unchanged, so that the angle of a display window of the sensor can be adjusted, the relative rotation of the sampling device and the sensor can be realized, the measuring direction is not influenced, and the measuring precision is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a bi-directional dynamic pressure detecting sensor system provided by the present utility model;
FIG. 2 is a schematic view of the sampling mechanism of FIG. 1 rotated 90 with respect to the bi-directional dynamic pressure detecting sensor;
FIG. 3 is a top view of a bi-directional dynamic pressure detecting sensor system provided by the present utility model;
FIG. 4 is a cross-sectional view of a sampling device for a bi-directional dynamic pressure detecting sensor provided by the present utility model;
FIG. 5 is a cross-sectional view of a fastener provided by the present utility model;
in the figure: 100-bidirectional dynamic pressure detection sensor, 101-pressure measurement unit, 1-connecting seat, 11-spacing protruding, 12-spacing mouth, 2-fastener, 21-through-hole, 3-rotating piece, 31-guide slot, 4-sampling mechanism, 41-first pressure guiding channel, 42-second pressure guiding channel, 43-inlet of first pressure guiding channel, 44-inlet of second pressure guiding channel, 45-outlet of first pressure guiding channel, 46-outlet of second pressure guiding channel.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, 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.
The utility model aims to provide a bidirectional dynamic pressure detection sensor system and a sampling device thereof, which are used for solving the problems in the prior art, enabling the sampling device and a sensor to rotate relatively, not affecting the measurement direction and ensuring the measurement precision.
In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1, the utility model provides a sampling device for a bidirectional dynamic pressure detection sensor, which comprises a sampling mechanism 4, wherein one end of the sampling mechanism 4 is a sampling end and is used for being placed into an air flow to be detected, the other end of the sampling mechanism 4 is a pressure measuring end and is used for being connected with a pressure measuring unit 101 of a sensor 100, the sampling mechanism 4 is a conventional bidirectional sampling mechanism in the field, a first pressure guiding channel 41 and a second pressure guiding channel 42 are arranged in the bidirectional sampling mechanism, and can be formed by welding two metal pipes in an integral structure, wherein an inlet 43 of the first pressure guiding channel and an inlet 44 of the second pressure guiding channel are both positioned at the sampling end and are both used for being introduced into the air flow to be detected, an outlet 45 of the first pressure guiding channel and an outlet 46 of the second pressure guiding channel are both positioned at the pressure measuring end and are both used for being introduced into the air flow to be detected, the first pressure guiding channel 41 and the second pressure guiding channel 42 are arranged in an axisymmetric way by taking a central axis of the sampling mechanism 4 as a symmetry axis, and an inlet 43 of the first pressure guiding channel and an inlet 44 of the second pressure guiding channel are coaxially arranged in opposite directions, and when the bidirectional pressure guiding mechanism is used, and the central axes of the two-direction of the bidirectional pressure guiding mechanism are parallel to the inlets of the two-direction detected by the inlet and the two-way pipe; the embodiment also comprises a connecting mechanism, and the sampling mechanism 4 can be rotationally connected with the sensor 100 through the connecting mechanism; the connection mechanism can connect the pressure measurement unit 101 of the sensor 100 and the pressure measurement end of the sampling mechanism 4, and can rotate the sensor 100 around the central axis of the sampling mechanism 4, as shown in fig. 2, that is, the sampling mechanism 4 in fig. 1 rotates 90 ° relative to the sensor 100; during measurement, the sensor 100 can be rotated according to the actual working condition requirement under the condition that the measurement direction is unchanged, so that the angle of the display window of the sensor 100 is adjusted, the relative rotation of the sampling device and the sensor 100 is realized, the measurement direction is not influenced, and the measurement precision is ensured.
In this embodiment, one end of the connection mechanism is a first mounting end and is used for being fixedly connected with the sensor 100, and the other end of the connection mechanism is a second mounting end and is used for being rotationally connected with the sampling mechanism 4; alternatively, as another possible example, the first mounting end is rotatably connected to the sensor 100 and the second mounting end is fixedly connected to the sampling mechanism 4, as long as the rotatable connection of the sampling mechanism 4 to the sensor 100 is enabled.
Further, the connecting mechanism comprises a connecting seat 1, a fastener 2 and a rotating piece 3; the connecting seat 1 is of a hollow structure with upper and lower openings, the upper end of the connecting seat 1 is a first mounting end, the upper end opening of the connecting seat 1 is used for being connected with the pressure measuring unit 101 of the sensor 100, the lower end of the connecting seat 1 is a second mounting end, and the lower end opening of the connecting seat 1 is used for being connected with the pressure measuring end of the sampling mechanism 4; the fastener 2 is sleeved on the outer side of the bottom of the connecting seat 1, a rotary gap is reserved between the bottom of the fastener 2 and the lower end of the connecting seat 1, and the rotary piece 3 is rotatably arranged in the rotary gap; the through hole 21 has been seted up to the bottom of fastener 2, and sampling mechanism 4's pressure measurement end can pass through the lower extreme opening of through hole 21 and connecting seat 1 from bottom to top in proper order, and with rotating member 3 fixed connection.
Further, as shown in fig. 4 to 5, the connecting seat 1 is cylindrical, the rotating member 3 is circular, and the outer diameter of the rotating member 3 is larger than the inner diameter of the lower end opening of the connecting seat 1; the fastener 2 is a threaded sleeve, the threaded sleeve is provided with internal threads, the diameter of the through hole 21 is smaller than the inner diameter of the threaded sleeve, and the outer side of the bottom of the connecting seat 1 is provided with external threads matched with the internal threads of the threaded sleeve; an annular flange is arranged on the outer wall of the connecting seat 1 along the circumferential direction, and the bottom of the annular flange can prop against the top of the threaded sleeve; during installation, the pressure measuring end of the sampling mechanism 4 is inserted into the opening at the lower end of the connecting seat 1, the top of the rotating piece 3 abuts against the lower end of the connecting seat 1, the threaded sleeve is sleeved from the sampling end of the sampling mechanism 4 and screwed on the bottom of the connecting seat 1 until the top of the threaded sleeve abuts against the bottom of the annular flange of the connecting seat 1, at the moment, a rotating gap for the rotating piece 3 to rotate is formed between the bottom of the threaded sleeve and the lower end of the connecting seat 1, and the rotating piece 3 is limited in the rotating gap, so that the rotating connection of the sampling mechanism 4 and the connecting seat 1 is realized.
In this embodiment, the rotating member 3 is sleeved outside the sampling mechanism 4, the rotating member 3 and the sampling mechanism 4 can be manufactured in an integrally formed manner, no movable part is required to be added on the sampling mechanism 4, the rotating member 3 is arranged outside the pressure guiding channel, the sealing problem of the pressure guiding channel is not required to be considered, and the transmission and measurement of the pressure in the pressure guiding channel are not affected, so that the sampling device of this embodiment has extremely high measurement precision; the embodiment has the advantages of simple and compact structure, easy processing and assembly, good consistency, long-term stability and convenience for various sensor applications such as static pressure, differential pressure, flow velocity, flow rate and the like based on the dynamic pressure measurement principle; in addition, the structure of the embodiment is particularly suitable for modern casting, such as applying advanced processing modes of 3D printing and the like, and the production cost is saved.
In this embodiment, the lower extreme of connecting seat 1 is provided with spacing protruding 11, and the top of rotating member 3 is provided with guide way 31, and spacing protruding 11 and guide way 31 assorted, the route of guide way 31 be non-closed circular, when rotating member 3 rotates for connecting seat 1, can restrict the motion track of spacing protruding 11 through guide way 31, and then realized the restriction of the turned angle of rotating member 3, and the practicality is strong.
In this embodiment, the sampling end of the sampling mechanism 4 is an S-shaped pitot tube structure, and it should be noted that the S-shaped pitot tube is formed by welding two metal tubes with the same shape and opposite directions of the sampling port, the sampling end of the sampling mechanism is provided with two openings with opposite directions, the sections of the two openings are parallel, and the wind speed of a pipeline or a mine tunnel can be measured by adopting the S-shaped pitot tube structure. When measured, the opening facing the air flow is called total pressure port, the corresponding total pressure is measured, the opening facing away from the air flow is called static pressure port, and the corresponding static pressure is measured. The difference between the total pressure and the static pressure is the dynamic pressure. The measuring principle is as follows: the two ends of the total pressure pipe and the static pressure pipe are respectively connected with the two ends of the U-shaped manometer. The gas density isρ, the density of the liquid in the manometer is ρ 1 . From the bernoulli equation:
wherein: v-air velocity, m/s; differential pressure value of p-pitot tube, pa; ρ -fluid density, kg/m 3 The method comprises the steps of carrying out a first treatment on the surface of the K-Pitot tube coefficient, S-type Pitot tube coefficient is 0.81-0.86.
Taking into account ρ 1 <<ρ and streamline are not straight and the engineering practical needs change the formula to:
therefore, the speed of the wind flow can be measured by measuring differential pressure values in the positive and negative directions, wherein the positive and negative of the v value reflect the direction of the wind flow. In practical engineering applications, the display window of the sensor 100 in the pipe should be generally parallel to the direction of the air flow, and the display window of the sensor 100 in the mine tunnel should be generally perpendicular to the direction of the air flow, for ease of viewing.
The utility model also provides a bidirectional dynamic pressure detection sensor system, which comprises the bidirectional dynamic pressure detection sensor and the sampling device for the bidirectional dynamic pressure detection sensor, wherein the sampling device for the bidirectional dynamic pressure detection sensor is arranged on the bidirectional dynamic pressure detection sensor.
In this embodiment, a mounting hole is formed at the bottom of the bidirectional dynamic pressure detection sensor, and the upper end of the connection mechanism is detachably and fixedly connected in the mounting hole, specifically, the upper end of the connection seat 1 in this embodiment can be inserted into the mounting hole, and can be fixed by a nut or a clamp spring; as shown in fig. 3, the upper end of the connecting seat 1 is provided with a limiting deviation opening 12, that is, two opposite planes are cut out along the axial direction on the outer surface of the cylinder, and the mounting hole is matched with the limiting deviation opening 12, so that the upper end of the connecting seat 1 can be prevented from rotating in the mounting hole.
The principles and embodiments of the present utility model have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present utility model; also, it is within the scope of the present utility model to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the utility model.
Claims (10)
1. The sampling device for the bidirectional dynamic pressure detection sensor comprises a sampling mechanism, wherein one end of the sampling mechanism is a sampling end and is used for being placed into an airflow to be detected, the other end of the sampling mechanism is a pressure measuring end and is used for being connected with a pressure measuring unit of the sensor, and the sampling mechanism is a bidirectional sampling mechanism; the method is characterized in that: the sampling mechanism can be rotationally connected with the sensor through the connecting mechanism; the connecting mechanism can be used for communicating the pressure measuring unit of the sensor with the pressure measuring end of the sampling mechanism and enabling the sensor to rotate around the central shaft of the sampling mechanism.
2. The sampling device for a bi-directional dynamic pressure detecting sensor according to claim 1, wherein: one end of the connecting mechanism is a first mounting end and is used for being fixedly connected with the sensor, and the other end of the connecting mechanism is a second mounting end and is used for being rotationally connected with the sampling mechanism.
3. The sampling device for a bi-directional dynamic pressure detecting sensor according to claim 2, wherein: the connecting mechanism comprises a connecting seat, a fastener and a rotating piece; the connecting seat is of a hollow structure with upper and lower openings, the upper end of the connecting seat is the first mounting end, the upper end opening of the connecting seat is used for being connected with a pressure measuring unit of the sensor, the lower end of the connecting seat is the second mounting end, and the lower end opening of the connecting seat is used for being connected with a pressure measuring end of the sampling mechanism; the fastener is sleeved on the outer side of the bottom of the connecting seat, a rotary gap is reserved between the bottom of the fastener and the lower end of the connecting seat, and the rotary piece is rotatably arranged in the rotary gap; the bottom of fastener has seted up the through-hole, sampling mechanism's pressure measurement end can pass from bottom to top in proper order the through-hole with the lower extreme opening of connecting seat, and with rotating member fixed connection.
4. A sampling device for a bi-directional dynamic pressure detecting sensor according to claim 3, wherein: the connecting seat is cylindrical, the rotating piece is annular, and the outer diameter of the rotating piece is larger than the inner diameter of the lower end opening of the connecting seat.
5. The sampling device for a bi-directional dynamic pressure detecting sensor according to claim 4, wherein: the lower extreme of connecting seat is provided with spacing arch, the top of rotating member is provided with the guide way, spacing arch with guide way assorted, the route of guide way is non-closed circular.
6. The sampling device for a bi-directional dynamic pressure detecting sensor according to claim 4, wherein: the fastener is the thread bush, the thread bush is provided with the internal thread, the diameter of through-hole is less than the internal diameter of thread bush, the bottom outside of connecting seat be provided with thread bush's internal thread assorted external screw thread.
7. The sampling device for a bi-directional dynamic pressure detecting sensor of claim 6, wherein: an annular flange is arranged on the outer wall of the connecting seat along the circumferential direction, and the bottom of the annular flange can prop against the top of the threaded sleeve.
8. The sampling device for a bi-directional dynamic pressure detecting sensor according to any one of claims 1 to 7, wherein: the sampling end of the sampling mechanism is of an S-shaped pitot tube structure.
9. A bi-directional dynamic pressure detecting sensor system, characterized in that: comprising a bi-directional dynamic pressure detecting sensor and a sampling device for a bi-directional dynamic pressure detecting sensor according to any one of claims 1 to 8, the sampling device for a bi-directional dynamic pressure detecting sensor being mounted on the bi-directional dynamic pressure detecting sensor.
10. The bi-directional dynamic pressure detecting sensor system according to claim 9, wherein: the bottom of the bidirectional dynamic pressure detection sensor is provided with a mounting hole, and the upper end of the connecting mechanism is detachably and fixedly connected in the mounting hole; the upper end of the connecting mechanism is provided with a limiting deviation opening, and the mounting hole is matched with the limiting deviation opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223272417.2U CN219369009U (en) | 2022-12-07 | 2022-12-07 | Bidirectional dynamic pressure detection sensor system and sampling device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223272417.2U CN219369009U (en) | 2022-12-07 | 2022-12-07 | Bidirectional dynamic pressure detection sensor system and sampling device thereof |
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| CN219369009U true CN219369009U (en) | 2023-07-18 |
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| CN202223272417.2U Active CN219369009U (en) | 2022-12-07 | 2022-12-07 | Bidirectional dynamic pressure detection sensor system and sampling device thereof |
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- 2022-12-07 CN CN202223272417.2U patent/CN219369009U/en active Active
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