阅读说明：本技术 一种挡板差压式流体流量测量装置 (Baffle differential pressure type fluid flow measuring device ) 是由 储群雄 胡晓晖 卢宗奎 梁志明 于 2021-08-12 设计创作，主要内容包括：一种挡板差压式流体流量测量装置,其包括若干个连为一体的取样单元,每个取样单元均包括正压取样端和负压取样端,其中正压取样端包括聚压筒、连接在聚压筒底部的挡板、插入在聚压筒内的正压取样管、悬挂在正压取样管中的第一清灰棒；其中负压取样端包括连接在聚压筒外壁上的负压取样管,负压取样管内悬挂有第二清灰棒；若干个正压取样管的端部连通,汇聚成一个正压取样口,若干个负压取样管的端部连通,汇聚成一个负压取样口；本发明挡板差压式流体流量测量装置通过聚压筒和聚压板的结构设计,能够增加正、负压差,从而提高测量精度,通过取样管处的清灰棒可避免飞尘和其他杂质造成堵塞。(A baffle differential pressure type fluid flow measuring device comprises a plurality of sampling units which are connected into a whole, wherein each sampling unit comprises a positive pressure sampling end and a negative pressure sampling end, the positive pressure sampling end comprises a pressure gathering cylinder, a baffle connected to the bottom of the pressure gathering cylinder, a positive pressure sampling pipe inserted into the pressure gathering cylinder, and a first ash removal rod hung in the positive pressure sampling pipe; the negative pressure sampling end comprises a negative pressure sampling tube connected to the outer wall of the pressure gathering cylinder, and a second ash removal rod is hung in the negative pressure sampling tube; the ends of the positive pressure sampling pipes are communicated and converged into a positive pressure sampling port, and the ends of the negative pressure sampling pipes are communicated and converged into a negative pressure sampling port; the baffle differential pressure type fluid flow measuring device can increase positive and negative pressure difference through the structural design of the pressure gathering cylinder and the pressure gathering plate, thereby improving the measuring precision, and avoiding blockage caused by flying dust and other impurities through the ash removing rod at the sampling pipe.)

1. A baffle differential pressure type fluid flow measuring device is characterized by comprising a plurality of sampling units which are connected into a whole, wherein each sampling unit comprises a positive pressure sampling end and a negative pressure sampling end, the positive pressure sampling end comprises a pressure gathering cylinder (1) arranged in a pipeline, a baffle (2) connected to the bottom of the pressure gathering cylinder, a positive pressure sampling pipe (3) inserted into the pressure gathering cylinder, and a first ash removal rod (4) suspended in the positive pressure sampling pipe; wherein the negative pressure sampling end comprises a negative pressure sampling tube (5) connected to the outer wall of the pressure gathering cylinder (1), and a second ash removal rod (6) is suspended in the negative pressure sampling tube; the end parts of the plurality of positive pressure sampling tubes (3) are communicated and converged into a positive pressure sampling port (7), and the end parts of the plurality of negative pressure sampling tubes (5) are communicated and converged into a negative pressure sampling port (8).

2. A baffled differential pressure fluid flow measurement device according to claim 1, wherein the concentrator bowl (1) is mounted within and parallel to the pipe with the opening in the opposite direction to the direction of fluid flow.

3. The baffle differential pressure type fluid flow measuring device according to claim 1, wherein the diameter of the baffle (2) is smaller than that of the pressure gathering cylinder (1), the baffle is installed at the bottom of the pressure gathering cylinder (1) through a plurality of connecting rods, and a gap is left between the baffle and the inner wall of the pressure gathering cylinder to form an ash discharge port (9).

4. The baffle differential pressure type fluid flow measuring device according to claim 1, wherein the first ash removal rod (4) inside the positive pressure sampling tube (3) is rotatably connected with the tube wall of the positive pressure sampling tube (3) through a shaft pin.

5. The baffle differential pressure fluid flow measuring device of claim 1, wherein the second ash removal rod (6) is rotatably connected with the tube wall of the negative pressure sampling tube (5) through a shaft pin.

6. The measuring method applied to the baffle differential pressure type fluid flow measuring device of claim 1 is characterized in that the measuring method utilizes a baffle differential pressure principle to measure the flow rate of fluid in a pipeline, the measuring method comprises a baffle (2) positioned in the pipeline, a positive pressure sampling pipe (3) and a negative pressure sampling pipe (5) positioned on two sides of the baffle, kinetic energy is converted into pressure energy when the fluid impacts the baffle (2), the positive pressure sampling pipe (3) is high in pressure, the negative pressure sampling pipe (5) on the other side of the baffle is not impacted by the fluid and is low in pressure, a pressure difference is formed between the positive pressure sampling pipe (3) and the negative pressure sampling pipe, and the measured pressure difference is used for calculating the flow rate of the fluid according to a Bernoulli equation.

7. The method for measuring the baffle differential pressure type fluid flow measuring device according to claim 6, characterized in that when the flow velocity of the fluid in the pipeline is low, a pressure gathering cylinder (1) is arranged in the pipeline, and the pressure difference between two sides of the baffle is enlarged by the pressure gathering cylinder, thereby improving the measuring precision.

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of fluid flow measurement, in particular to a baffle differential pressure type fluid flow measurement device.

[ background of the invention ]

At present, the domestic fluid flow measuring devices are various in types and mainly comprise: airfoil type, venturi type, flute type, aluba type, power ba type, orifice plate type, nozzle type, plug-in venturi type and plug-in orifice plate type etc. but in the aspect of the flow measurement of dirty gas and dirty liquid, the result of use of each measuring device is unsatisfactory, and the main problem that exists is:

1. in the measurement of dust-containing gas, the primary element of the measuring device is easy to be blocked due to dust, and the blocking problem is also existed in the flow measurement of impurity-containing liquid. And cannot be reliably used for a long time. All of the flow measuring devices described above do not solve the anti-clogging problem well.

2. If the whole pipeline adopts a wing type or Venturi type or orifice type flow measuring device, the pressure loss is large, the power consumption of the fan is increased after long-term operation, and the energy-saving effect is poor;

3. many flow measuring devices have high installation requirements, and the required front and rear straight pipe sections are long and cannot be met in many occasions;

4. because the pipeline has a large section and an uneven flow field, the average air volume in the pipeline cannot be accurately measured by adopting an inserted single-point measuring device;

therefore, the invention provides a baffle differential pressure type anti-blocking fluid flow measuring device, which is a problem to be solved urgently.

[ summary of the invention ]

Aiming at the problems, the baffle differential pressure type fluid flow measuring device can realize single-point measurement through the sampling units, can realize full-section measurement through the combination of a plurality of sampling units, can increase positive and negative pressure difference through the structural design of the pressure gathering cylinder and the baffle, thereby improving the measurement precision, and can avoid blockage caused by flying dust and other impurities through the ash removing rod at the sampling pipe.

In order to solve the problems, the invention provides a baffle differential pressure type fluid flow measuring device which comprises a plurality of sampling units which are connected into a whole, wherein each sampling unit comprises a positive pressure sampling end and a negative pressure sampling end, the positive pressure sampling end comprises a pressure gathering cylinder, a baffle connected to the bottom of the pressure gathering cylinder, a positive pressure sampling pipe inserted into the pressure gathering cylinder, and a first ash removing rod hung in the positive pressure sampling pipe; the negative pressure sampling end comprises a negative pressure sampling tube connected to the outer wall of the pressure gathering cylinder, and a second ash removal rod is hung in the negative pressure sampling tube; the end parts of the plurality of positive pressure sampling tubes are communicated to form a positive pressure sampling port, and the end parts of the plurality of negative pressure sampling tubes are communicated to form a negative pressure sampling port.

Further, the pressure gathering cylinder is arranged inside the pipeline and is parallel to the pipeline, and the opening direction of the pressure gathering cylinder is opposite to the fluid flow direction.

Furthermore, the diameter of the baffle is smaller than that of the pressure gathering cylinder, the baffle is mounted at the bottom of the pressure gathering cylinder through a plurality of connecting rods, and a gap is reserved between the baffle and the inner wall of the pressure gathering cylinder to form an ash discharge port.

Furthermore, the first ash removal rod in the positive pressure pipe is rotatably connected with the pipe wall of the positive pressure sampling pipe through a shaft pin.

Furthermore, the second ash removal rod is rotatably connected with the pipe wall of the negative pressure sampling pipe through a shaft pin.

A method for measuring the flow of fluid in a pipeline by utilizing the differential pressure principle of a baffle plate comprises the baffle plate positioned in the pipeline, a positive pressure sampling pipe and a negative pressure sampling pipe which are positioned on two sides of the baffle plate, wherein kinetic energy is converted into pressure energy when the fluid impacts the baffle plate, the pressure of the positive pressure sampling pipe is higher, the negative pressure sampling pipe on the other side of the baffle plate is not impacted by the fluid, the pressure is lower, the two form differential pressure, and the measured differential pressure calculates the flow of the fluid according to the Bernoulli equation.

Furthermore, when the flow velocity of the fluid in the pipeline is low, a pressure gathering cylinder is arranged in the pipeline, and the pressure difference on two sides of the baffle is enlarged through the pressure gathering cylinder, so that the measurement precision is improved.

Furthermore, the baffle differential pressure type fluid flow measuring device can realize single-point measurement through the sampling unit, can realize full-section measurement through the combination of the sampling units, can increase positive and negative pressure difference through the structural design of the pressure gathering cylinder and the baffle, thereby improving the measurement precision, and can avoid blockage caused by dust flying through the ash cleaning rod at the sampling pipe.

[ description of the drawings ]

FIG. 1 is a schematic view of a baffle differential pressure fluid flow measuring device of the present invention.

FIG. 2 is a schematic view of a vertical pipe survey installation.

Fig. 3 is a schematic view of a horizontal duct survey installation.

Fig. 4 is a schematic view of the connection of the surge drum and the baffle.

[ detailed description ] embodiments

The directional terms of the present invention, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", etc., are only directions in the drawings, and are only used to explain and illustrate the present invention, but not to limit the scope of the present invention.

Referring to fig. 1 to 4, a composition structure of a baffle differential pressure type fluid flow measuring device of the present invention is shown, the baffle differential pressure type fluid flow measuring device is applied to the measurement of fluid flow in a pipeline, the present invention is a sampling end of the flow measuring device, the problem of blockage is solved by the anti-blocking design of the sampling end, so as to improve the service life, and the measurement precision is improved by the structural design, and the specific structure is as follows:

referring to fig. 1, the sampling end of the baffle differential pressure type fluid flow measuring device comprises a plurality of sampling units which are connected into a whole, each sampling unit comprises a positive pressure sampling end and a negative pressure sampling end, wherein the positive pressure sampling end comprises a pressure gathering cylinder 1 arranged in a pipeline, a baffle 2 connected to the bottom of the pressure gathering cylinder, a positive pressure sampling pipe 3 inserted into the pressure gathering cylinder, and a first ash removal rod 4 suspended in the positive pressure sampling pipe; the negative pressure sampling end comprises a negative pressure sampling tube 5 connected to the outer wall of the pressure gathering cylinder 1, and a second ash removal rod 6 is hung in the negative pressure sampling tube; the tip intercommunication of a plurality of malleation sampling tube 3 assembles into a malleation thief hatch 7, and the tip intercommunication of a plurality of negative pressure sampling tube 5 assembles into a negative pressure thief hatch 8, is connected to the pressure differential changer with malleation thief hatch and negative pressure thief hatch alright calculate the difference of malleation and negative pressure to calculate the fluid flow in the boiler pipeline, design increase positive and negative pressure difference value through a pressure gathering section of thick bamboo and baffle, thereby improve measuring accuracy.

Example 1

When the baffle differential pressure type fluid flow measuring device is applied to a vertical pipeline, as shown in fig. 2 and 4, the pressure gathering cylinder 1 is of a circular tube-shaped or square tube-shaped structure, is installed inside the vertical pipeline and is parallel to the pipeline, the opening direction is opposite to the fluid flow direction, the diameter of the baffle 2 is smaller than that of the pressure gathering cylinder 1, the baffle is installed at the bottom of the pressure gathering cylinder 1 through a plurality of connecting rods, a certain gap is reserved while the baffle can block the fluid, and an ash discharge port 9 is formed in the gap between the pressure gathering cylinder and the baffle; the positive pressure sampling tube 3 is inserted into the interior from the opening of the pressure gathering cylinder 1, and a gap is reserved between the bottom of the positive pressure sampling tube and the baffle 2, so that fluid and impurities in the fluid can smoothly pass through the gap; the first ash removing rod 4 in the positive pressure pipe 3 is rotatably connected with the pipe wall of the positive pressure sampling pipe 3 through a shaft pin; similarly, the second ash removal rod 6 is rotatably connected with the pipe wall of the negative pressure sampling pipe 5 through a shaft pin, the negative pressure sampling pipe 5 is tightly attached to the baffle 2, and the bottom ends of the first ash removal rod and the second ash removal rod extend out of the positive sampling pipe and the negative sampling pipe.

Example 2

When the baffle differential pressure type fluid flow measuring device is applied to a horizontal pipeline, as shown in fig. 3 and 4, the pressure gathering cylinder 1 is of a circular tube-shaped or square tube-shaped structure, is installed inside the horizontal pipeline and is parallel to the pipeline, the opening direction is opposite to the fluid flow direction, the diameter of the baffle 2 is smaller than that of the pressure gathering cylinder 1, the baffle is installed at the bottom of the pressure gathering cylinder 1 through a plurality of connecting rods, a certain gap is reserved while the baffle can block airflow, and an ash discharge port 9 is formed in the gap between the pressure gathering cylinder and the baffle; the positive pressure sampling tube 3 is vertically inserted into the pressure gathering cylinder 1 from the side wall of the pressure gathering cylinder 1, the negative pressure sampling tube is positioned outside the pressure gathering cylinder 1, a gap is reserved between the bottom of the positive pressure sampling tube and the inner wall of the pressure gathering cylinder, and a first ash removal rod 4 in the positive pressure sampling tube 3 is rotatably connected with the tube wall of the positive pressure sampling tube 3 through a shaft pin; similarly, the second ash removal rod 6 is rotatably connected with the pipe wall of the negative pressure sampling pipe 5 through a shaft pin; in addition, it should be noted that the bottom end of the positive pressure sampling tube 3 is located at the center line of the pressure gathering cylinder, the positive pressure sampling tube 3 and the negative pressure sampling tube 5 are both tightly attached to the baffle 2, and the bottom ends of the first ash removal rod and the second ash removal rod extend out of the positive sampling tube and the negative sampling tube.

The working principle is as follows:

during single-point measurement, one sampling unit is arranged in the pipeline, and during full-section multipoint measurement, a plurality of sampling units are connected into a whole and arranged in the pipeline; the sampling unit is based on a differential pressure measurement principle, when fluid flows in a pipeline, a baffle plate at the bottom of the pressure accumulation cylinder is impacted by the fluid, the kinetic energy of the fluid is converted into pressure energy at the position, and the pressure is led out by a positive pressure sampling pipe; the pressure in the pressure accumulating cylinder is higher, the pressure is called as 'full pressure', the negative pressure sampling tube is not stamped by airflow, the pressure in the tube is the static pressure in the air duct, the difference between the full pressure and the static pressure is called as differential pressure, the magnitude of the differential pressure is related to the magnitude of flow velocity (quantity) in the tube, and the greater the flow velocity (quantity), the greater the differential pressure; on the contrary, the flow rate (quantity) is small, and the differential pressure is also small; therefore, the flow velocity (quantity) in the pipe can be accurately measured by the differential pressure transmitter.

The invention uses the first and second ash cleaning rods to knock the positive and negative pressure sampling tubes to avoid the accumulation of the fly ash or impurities, and the falling fly ash or impurities are flushed out from the ash discharge port by the fluid, thereby avoiding the blockage.

The baffle differential pressure type fluid flow measuring device can realize single-point measurement through the sampling unit, can realize full-section measurement through the combination of the sampling units, can increase positive and negative pressure difference through the structural design of the pressure gathering cylinder and the baffle, thereby improving the measurement precision, and can avoid blockage caused by dust flying through the ash removing rod at the sampling pipe.

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.