CN214277052U - Pressure taking head of rectifier type flow sensor - Google Patents

Abstract

The utility model discloses a commutator flow sensor pressure head, it is the columniform pressure head body to have wholly to be, the upper end of getting the pressure head body is formed with cylindrical top connection, get this internal total pressure passageway and static pressure passageway of pressure head, the left side of getting pressure head body hypomere, the right side both sides have a left side, right inclined plane, there is the total pressure hole that links to each other with the total pressure passageway on the inclined plane of a left side, there is the static pressure hole that links to each other with static pressure passageway on the inclined plane of the right side, the left inclined plane at total pressure hole place and the contained angle alpha of getting pressure head body axis are less than the contained angle beta of static pressure hole place right inclined plane and getting pressure head body axis, the preceding, back both sides of getting the pressure head body that are located cylindrical top connection below still symmetry equipartition from top to bottom offer along left and right direction many drainage grooves that move towards, the tank bottom of every drainage groove with total pressure passageway or static pressure passageway all not directly communicate. The fluid flows through the utility model discloses the static pressure signal of flow field relatively stable, the extraction in static pressure hole department also relatively stable afterwards.

Description

Pressure taking head of rectifier type flow sensor

Technical Field

The utility model relates to a flow sensor pressure taking head, specifically speaking relate to a pressure taking head of rectifier flow sensor.

Background

Chinese utility model ZL 201420365066.6 discloses "a high stability, wide velocity of flow scope is bi to hold in the palm pressure head of flow sensor, its major structure has the pressure head body of getting, the upper end of getting the pressure head body has cylindrical top connection, get this internal full pressure passageway and the static pressure passageway that has the axis and this axis of getting the pressure head parallel, full pressure passageway and static pressure passageway have full pressure passway and the static pressure passway in getting the pressure head body upper end, it has a left side to get pressure head body hypomere, right inclined plane, have the full pressure hole that links to each other with full pressure passageway on the inclined plane, there is the static pressure hole that links to each other with static pressure passageway on another inclined plane, the inclined plane at full pressure hole place and the contained angle alpha of getting the pressure head this axis are less than the contained angle beta of inclined plane at static pressure hole place and getting pressure head body axis.

When the flow sensor pressure sampling head in the prior art is used, the pressure sampling head is connected with the pressure guide pipe to be assembled into a flow sensor, the pressure sampling head is vertically inserted into a pipeline from the pipe wall of the pipeline, the central points of a full pressure hole and a static pressure hole are connected on the axis of the pipeline, the full pressure hole faces the incoming flow direction of fluid, the static pressure hole faces the outgoing flow direction of the fluid, when the fluid flows in the pipeline, the full pressure interface and the static pressure interface at the upper end of the pressure guide pipe respectively output the full pressure and the static pressure of the fluid flowing in the pipeline, and the flow of the fluid in the pipeline can be calculated according to the fluid mechanics principle.

The pressure head is got to sensor of above-mentioned structure, because the contained angle alpha of an inclined plane that has the total head pressure hole and get the pressure head body axis is less than another inclined plane that has the static pressure hole and get the pressure head body axis's contained angle beta, the differential pressure that produces at total head pressure hole and static pressure hole when the pressure head is got to the fluid process is bigger, is gathered by differential pressure transmitter easily, can adapt to the measurement of low velocity of flow medium flow in the pipeline better, and is also higher to low velocity of flow medium flow measurement's degree of accuracy and accuracy. However, when the medium flow velocity in the pipeline is high, the fluid flows through the pressure sampling head of the structure sensor, turbulence phenomenon occurs at the static pressure hole, the flow field fluctuation is large, and a static pressure signal extracted by the pressure sampling head is unstable, so that the flow measurement of the fluid medium in the pipeline is influenced.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a pressure head is got to commutator flow sensor, the fluid flow in the pipeline is through the utility model discloses back also relatively stable in the flow field relatively stable of static pressure hole department, the static pressure signal of drawing to can more accurately measure the flow of the fluid medium in the pipeline.

In order to solve the technical problem, the utility model discloses a commutator flow sensor pressure taking head, it is the columniform pressure taking head body to have wholly, the upper end of pressure taking head body is formed with cylindrical top connection, pressure taking head body is internal to have axis and pressure taking head body axis parallel's total pressure passageway and static pressure passageway, total pressure passageway and static pressure passageway have total pressure passway and the static pressure passway that are located cylindrical top connection top, left and right both sides of pressure taking head body hypomere have left and right inclined plane, left side has the total pressure hole that links to each other with total pressure passageway on the inclined plane, right side has the static pressure hole that links to each other with static pressure passageway on the inclined plane, the contained angle alpha of left inclined plane at total pressure hole place and pressure taking head body axis is less than the contained angle beta of right inclined plane at static pressure hole place and pressure taking head body axis, the preceding of pressure taking head body below cylindrical top connection, back both sides are from top to bottom still symmetry equipartition and have been seted up along left, And the bottom of each drainage groove is not directly communicated with the full-pressure channel or the static-pressure channel.

As an improvement of the utility model, the uppermost drainage groove is positioned at the two sides of the top of the full pressure hole.

As a further improvement of the utility model, be located the pressure head body's of cylindrical top connection below the right side seted up with the first negative pressure hole that static pressure passageway is linked together, the second negative pressure hole that is linked together with static pressure passageway is seted up between the front and back side of pressure head body, the axis in first negative pressure hole is mutually perpendicular with the axis in second negative pressure hole, static pressure passageway's axis is mutually perpendicular with the axis in first negative pressure hole and the plane that the axis in second negative pressure hole was confirmed mutually.

As a further improvement of the present invention, the inner diameters of the static pressure passage, the first negative pressure tapping hole and the second negative pressure tapping hole are equal.

As a further improvement, the first negative pressure tapping hole and the second negative pressure tapping hole are located at a position below the top of the full-pressure hole.

The utility model discloses following profitable technological effect has: 1. because the preceding, back both sides of pressure head body from top to bottom the symmetry equipartition offer along the many drainage grooves of left and right direction trend, therefore the fluid flows through the utility model discloses a can not appear turbulent phenomenon in static pressure hole department during pressure head, the flow field is relatively stable, and the static pressure signal that the pressure head drawed is also more stable to can more accurately measure the flow of the fluid medium in the pipeline. 2. The utility model discloses a get behind the pressure head was provided with the first negative pressure hole of getting and the second negative pressure hole of getting that is linked together with static pressure channel, can further strengthen static pressure output signal's stability, improve measuring result's precision.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 is the main sectional structure schematic diagram of the pressure tapping head of the rectifying flow sensor of the present invention.

Fig. 2 is a schematic left side view of fig. 1.

Fig. 3 is a schematic top view of fig. 1.

Fig. 4 is a schematic top view of fig. 2.

Fig. 5 is a rear view schematic of fig. 1.

Detailed Description

Referring to fig. 1-5, the utility model discloses a commutator flow sensor pressure taking head, it wholly is columniform pressure taking head body 1 to have, the upper end of pressure taking head body is formed with cylindrical top connection 2, pressure taking head is originally internal to have axis and pressure taking head body axis parallel's total pressure passageway 3 and static pressure passageway 4, total pressure passageway and static pressure passageway have total pressure port 5 and static pressure port 6 that are located cylindrical top connection top, left and right both sides of pressure taking head body hypomere have left and right inclined plane 7, 8, have the total pressure hole 9 that links to each other with total pressure passageway on the inclined plane 7 of a left side, have the static pressure hole 10 that links to each other with static pressure passageway on the inclined plane 8 of a right side, the contained angle alpha of the left inclined plane 7 that the total pressure hole was located and pressure taking head body axis is less than the contained angle beta of right inclined plane 8 that the static pressure hole was located and pressure taking head body axis, be located the preceding of the pressure taking head body below cylindrical top connection 2, the pressure taking head body, And a plurality of drainage grooves 11 which are arranged along the left and right directions are symmetrically and uniformly distributed on the two back sides from top to bottom, and the groove bottom 111 of each drainage groove is not directly communicated with the full-pressure channel 3 or the static pressure channel 4. The uppermost drainage grooves 11 are located at the two sides of the top of the full pressure hole 9. A first negative pressure tapping hole 12 communicated with the static pressure channel 4 is formed in the right side of the pressure tapping head body below the cylindrical upper joint 2, a second negative pressure tapping hole 13 communicated with the static pressure channel 4 is formed between the front side and the rear side of the pressure tapping head body, the axis of the first negative pressure tapping hole is perpendicular to the axis of the second negative pressure tapping hole, and the axis of the static pressure channel is perpendicular to a plane determined by the axis of the first negative pressure tapping hole and the axis of the second negative pressure tapping hole. The static pressure channel 4, the first negative pressure taking hole 12 and the second negative pressure taking hole 13 are equal in inner diameter. The first negative pressure tapping hole 12 and the second negative pressure tapping hole 13 are located at positions below the top of the full pressure hole 9.

Claims (5)

1. A pressure taking head of a rectifier type flow sensor comprises a pressure taking head body (1) which is cylindrical as a whole, a cylindrical upper joint (2) is formed at the upper end of the pressure taking head body, a full-pressure channel (3) and a static-pressure channel (4) with axes parallel to the axis of the pressure taking head body are arranged in the pressure taking head body, the full-pressure channel and the static-pressure channel are provided with a full-pressure channel port (5) and a static-pressure channel port (6) which are positioned at the top end of the cylindrical upper joint, the left side and the right side of the lower section of the pressure taking head body are provided with a left side, right inclined plane (7, 8), have on left inclined plane (7) and press hole (9) entirely that the passageway links to each other with pressing entirely, have on right inclined plane (8) and press static pressure hole (10) that the passageway links to each other with static pressure, the contained angle alpha that left inclined plane (7) that the hole place was pressed entirely and the pressure head body axis is less than static pressure hole place right inclined plane (8) and the contained angle beta of pressure head body axis, its characterized in that: the front side and the rear side of the pressure taking head body below the cylindrical upper joint (2) are symmetrically and uniformly distributed from top to bottom along the trend of the left direction and the right direction, and the bottom (111) of each drainage groove is not directly communicated with the full pressure channel (3) or the static pressure channel (4).

2. The pressure tap of a commutating flow sensor of claim 1 wherein: the uppermost drainage groove (11) is positioned at the two sides of the top of the full pressure hole (9).

3. The pressure sampling head of a flow rate sensor as defined in claim 1 or 2, wherein: the right side of the pressure taking head body positioned below the cylindrical upper joint (2) is provided with a first negative pressure taking hole (12) communicated with the static pressure channel (4), a second negative pressure taking hole (13) communicated with the static pressure channel (4) is arranged between the front side and the rear side of the pressure taking head body, the axis of the first negative pressure taking hole is vertical to the axis of the second negative pressure taking hole, and the axis of the static pressure channel is vertical to the plane determined by the axis of the first negative pressure taking hole and the axis of the second negative pressure taking hole.

4. The pressure tap of a commutating flow sensor of claim 3 wherein: the inner diameters of the static pressure channel (4), the first negative pressure taking hole (12) and the second negative pressure taking hole (13) are equal.

5. The pressure tap of a commutating flow sensor of claim 3 wherein: the first negative pressure taking hole (12) and the second negative pressure taking hole (13) are positioned below the top of the full pressure hole (9).

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