阅读说明：本技术 一种引压介质等量分配体系 (Equal-quantity distribution system for pressure-inducing medium ) 是由 唐田 朱建 刘庆 杨小华 于 2021-07-15 设计创作，主要内容包括：本发明公开了一种引压介质等量分配体系,包括稳压室,该稳压室内设有压力传感器,稳压室的内壁与压力传感器之间设有填注夹层,该压力传感器内设有隔离膜片,该隔离膜片将传感器壳体内部分隔为第一受压腔和第二受压腔,第一受压腔与填注夹层同时连接有第一压力源,第二受压腔连接有第二压力源,第二受压腔还连接有平衡室。采用本发明的一种引压介质等量分配体系,第一受压腔与填注夹层同时连接有第一压力源,第二受压腔连接有第二压力源的基础上,使第二受压腔还连接有平衡室,减小高压侧(稳压室和高压端膜片变形腔体)和低压侧(低压端膜片变形腔体)的硅油量差距并使两侧压力平衡,避免影响精度。(The invention discloses a pressure medium equivalent distribution system, which comprises a pressure stabilizing chamber, wherein a pressure sensor is arranged in the pressure stabilizing chamber, a filling interlayer is arranged between the inner wall of the pressure stabilizing chamber and the pressure sensor, an isolation diaphragm is arranged in the pressure sensor, the isolation diaphragm divides the inner part of a sensor shell into a first pressure cavity and a second pressure cavity, the first pressure cavity and the filling interlayer are simultaneously connected with a first pressure source, the second pressure cavity is connected with a second pressure source, and the second pressure cavity is also connected with a balance chamber. By adopting the equal-quantity distribution system of the pressure-inducing medium, the first pressure-bearing cavity and the filling interlayer are simultaneously connected with the first pressure source, and the second pressure-bearing cavity is connected with the second pressure source, so that the second pressure-bearing cavity is also connected with the balance chamber, the silicon oil quantity difference between the high-pressure side (the pressure stabilizing chamber and the high-pressure end diaphragm deformation cavity) and the low-pressure side (the low-pressure end diaphragm deformation cavity) is reduced, the pressures on the two sides are balanced, and the influence on the precision is avoided.)

1. An equal distribution system of pressure-inducing medium, which is characterized in that: including pressure-stabilizing chamber (25), be equipped with pressure sensor (2) in this pressure-stabilizing chamber (25), the inner wall of pressure-stabilizing chamber (25) with be equipped with between pressure sensor (2) and fill and annotate intermediate layer (25a), this pressure sensor (2) include sensor housing (3), are equipped with isolation diaphragm (3a) in this sensor housing (3), and this isolation diaphragm (3a) will sensor housing (3) internal partitioning is for two pressurized cavity (1a), sensor housing (3) are gone up and are corresponded every pressurized cavity (1a) are equipped with the induced pressure runner respectively, the induced pressure runner will the outside of sensor housing (3) with correspond pressurized cavity (1a) switch-on, its characterized in that:

one pressurized cavity (1a) is a first pressurized cavity, the other pressurized cavity (1a) is a second pressurized cavity, the first pressurized cavity and the filling interlayer (25a) are simultaneously connected with a first pressure source, the second pressurized cavity is connected with a second pressure source, and the second pressurized cavity is further connected with a balance chamber (25 b).

2. The pressure medium equal distribution system of claim 1, wherein: the first pressure chamber is also connected to the filling sandwich (25 a).

3. The pressure medium equal distribution system of claim 2, wherein: the first pressure cavity is communicated with the filling interlayer (25a) to form a first liquid injection area, the second pressure cavity is communicated with the balance chamber (25b) to form a second liquid injection area, and the volumes of the first liquid injection area and the second liquid injection area are equal.

4. A pressure medium equal distribution system according to claim 2 or 3, wherein: the first pressure-bearing cavity is communicated with the filling interlayer (25a) through the corresponding pressure-guiding flow channel, and the filling interlayer (25a) is connected with the first pressure source through a pipeline.

5. A pressure medium equal distribution system according to claim 2 or 3, wherein: the first pressure-bearing cavity is communicated with the filling interlayer (25a) through a pipeline, and the first pressure-bearing cavity is connected with the first pressure source through the corresponding pressure guide flow passage.

6. An equal distribution system of pressure inducing media as in claims 1, 2, 3, 4 or 5, wherein: the second pressure-bearing cavity is connected with the second pressure source through the corresponding pressure-guiding flow passage.

7. The pressure medium equal distribution system of claim 3, wherein: still including installation base (2a), still be equipped with two sets of pressure chambers that draw in installation base (2a), draw the pressure chamber with draw and press the runner one-to-one still be equipped with the switch-on in installation base (2a) draw the pressure chamber with draw the confession of pressing the runner and press the runner, one draw the pressure chamber with correspond supply to press the runner to form first filling area, another draw the pressure chamber with correspond supply to press the runner to form the second filling area, first filling area with the volume in second filling area equals.

8. The pressure medium equal distribution system of claim 7, wherein: the balance chamber (25b) is positioned at the bottom of the mounting base (2a), the balance chamber (25b) is provided with an opening, the opening of the balance chamber (25b) penetrates out of the bottom surface of the mounting base (2a), and the opening of the balance chamber (25b) is provided with a sealing plug;

the equalizing chamber (25b) is in communication with the pressure-introduction chamber of the second filling zone.

9. The pressure medium equal distribution system of claim 8, wherein: draw and press still to be equipped with the opening on the chamber respectively, draw the opening and the external switch-on in pressure chamber, center on draw the opening in pressure chamber still to be equipped with annular diaphragm mount pad (4), diaphragm mount pad (4) are cyclic annular welding boss, draw the opening in pressure chamber still the lock and have isolation diaphragm (4a), the edge of isolation diaphragm (4a) with the inner circle fixed connection of diaphragm mount pad (4).

Technical Field

The invention relates to a distribution system, in particular to an equal distribution system of pressure-inducing media.

Background

The core detection component of the capacitance differential pressure transmitter is a diaphragm capacitance differential pressure transmitter (diaphragm pressure sensor), which converts two external different pressure signals into corresponding capacitance changes, and the rear detection circuit converts the capacitance changes into electric signals, and the electric signals are processed and detected to obtain the differential pressure value of the external pressure.

The diaphragm type pressure sensor comprises two cake-shaped diaphragm seats, the edges of the two diaphragm seats are welded, a diaphragm deformation cavity is arranged between the two diaphragm seats, a measuring diaphragm is arranged between the two diaphragm seats, pressure transmission channels penetrate through the two diaphragm seats respectively, silicone oil is filled in the pressure transmission channels and the diaphragm deformation cavity, the fluid pressure to be measured outside is introduced into the two sides of the measuring diaphragm as a pressure transmission medium, and the size of the deformation of the measuring diaphragm reflects the size of differential pressure.

In order to solve the above problems, the applicant proposes that a pressure stabilizing chamber is arranged at the outer side of the diaphragm type pressure sensor, silicone oil is filled in the pressure stabilizing chamber, the fluid pressure (the pressure of the high-pressure side) is led to the pressure stabilizing chamber, and the silicone oil in the pressure stabilizing chamber and the silicone oil in the diaphragm type deformation cavity jointly act on the diaphragm type pressure sensor, so as to offset/weaken the internal pressure of the deformation cavity (Chinese patent: CN 202011592010.0).

However, in the course of subsequent studies, researchers have found that the above solution still has the following technical problems: the volume of the silicon oil changes along with the temperature change, and the quantity difference of the silicon oil on the high-pressure side (a pressure stabilizing chamber and a high-pressure end diaphragm deformation cavity) and the quantity difference of the silicon oil on the low-pressure side (a low-pressure end diaphragm deformation cavity) are large, so that the silicon oil on the high-pressure side and the silicon oil on the low-pressure side change in different degrees and scales, the internal and external pressure unbalance of the high-pressure side and the low-pressure side is caused, and the measurement precision is influenced.

Disclosure of Invention

In view of this, the present invention provides an equal distribution system for pressure medium, which is helpful for equal distribution of pressure medium.

The technical scheme is as follows:

the utility model provides a draw pressure medium equivalent distribution system, its key lies in, includes the surge chamber, is equipped with pressure sensor in this surge chamber, the inner wall of surge chamber with be equipped with between the pressure sensor and fill the intermediate layer, this pressure sensor includes the sensor casing, is equipped with the isolation diaphragm in this sensor casing, this isolation diaphragm will sensor casing internal partitioning is two pressurized chambeies, it draws the pressure runner to correspond every respectively to be equipped with on the sensor casing pressurized chamber, draw the pressure runner with the outside of sensor casing with correspond pressurized chamber switch-on, its characterized in that:

one the pressurized cavity is a first pressurized cavity, the other pressurized cavity is a second pressurized cavity, the first pressurized cavity and the filling interlayer are simultaneously connected with a first pressure source, the second pressurized cavity is connected with a second pressure source, and the second pressurized cavity is further connected with a balance chamber.

The effect of adopting above scheme: the first pressurized cavity and the filling interlayer are simultaneously connected with a first pressure source, and the second pressurized cavity is connected with a second pressure source, so that the second pressurized cavity is also connected with a balance chamber, the silicon oil quantity difference between the high-pressure side (a pressure stabilizing chamber and a high-pressure end diaphragm deformation cavity) and the low-pressure side (a low-pressure end diaphragm deformation cavity) is reduced, the pressures on the two sides are balanced, and the influence on the precision is avoided.

The first pressurized cavity is also in communication with the filling interlayer.

The first pressure cavity is communicated with the filling interlayer to form a first liquid injection area, the second pressure cavity is communicated with the balance chamber to form a second liquid injection area, and the volumes of the first liquid injection area and the second liquid injection area are equal.

The first pressure-bearing cavity is communicated with the filling interlayer through the corresponding pressure-leading flow channel, and the filling interlayer is connected with the first pressure source through a pipeline.

The first pressure-bearing cavity is communicated with the filling interlayer through a pipeline, and the first pressure-bearing cavity is connected with the first pressure source through the corresponding pressure-leading flow passage.

The second pressure-bearing cavity is connected with the second pressure source through the corresponding pressure-guiding flow passage.

Still including the installation base, still be equipped with two sets of pressure chambers that draw in the installation base, draw the pressure chamber with draw and press the runner one-to-one still be equipped with the switch-on in the installation base draw the pressure chamber with draw the confession of pressing the runner and press the runner, one draw the pressure chamber with correspond supply to press the runner to form first filling area, another draw the pressure chamber with correspond supply to press the runner to form the second and fill the district, first filling area with the volume in second filling area equals.

The balance chamber is positioned at the bottom of the mounting base and provided with an opening, the opening of the balance chamber penetrates out of the bottom surface of the mounting base, and the opening of the balance chamber is provided with a sealing plug;

the equalizing chamber is in communication with the pressure-drawing cavity of the second filling zone.

The pressure inducing cavity is further provided with openings, the openings of the pressure inducing cavity are communicated with the outside, an annular diaphragm mounting seat is further arranged around the openings of the pressure inducing cavity, the diaphragm mounting seat is an annular welding boss, an isolation diaphragm is further buckled on the openings of the pressure inducing cavity, and the edge of the isolation diaphragm is fixedly connected with the inner ring of the diaphragm mounting seat.

Has the advantages that: according to the invention, on the basis that the first pressure-bearing cavity and the filling interlayer are simultaneously connected with the first pressure source, and the second pressure-bearing cavity is connected with the second pressure source, the second pressure-bearing cavity is also connected with the balance chamber, so that the silicon oil quantity difference between the high-pressure side (a pressure stabilizing chamber and a high-pressure end diaphragm deformation cavity) and the low-pressure side (a low-pressure end diaphragm deformation cavity) is reduced, the pressures at the two sides are balanced, and the influence on the precision is avoided.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the cross-sectional structure A-A of FIG. 1;

FIG. 3 is a schematic view of the cross-sectional structure B-B of FIG. 1;

FIG. 4 is another schematic structural view of the present invention;

FIG. 5 is a schematic view of the cross-sectional structure C-C of FIG. 4;

FIG. 6 is an enlarged view of a portion of FIG. 5 taken at Z;

FIG. 7 is a schematic view of the cross-sectional structure of FIG. 4 taken along line D-D;

fig. 8 is a schematic view of the cross-sectional structure E-E of fig. 4.

Detailed Description

The present invention will be further described with reference to the following examples and the accompanying drawings.

Example 1:

as shown in fig. 1 to 3, an equal-quantity distribution system for pressure-inducing media mainly includes a pressure-stabilizing chamber 25, a pressure sensor 2 is disposed in the pressure-stabilizing chamber 25, a filling interlayer 25a is disposed between an inner wall of the pressure-stabilizing chamber 25 and the pressure sensor 2, the pressure sensor 2 includes a sensor housing 3, an isolation diaphragm 3a is disposed in the sensor housing 3, the isolation diaphragm 3a divides the inside of the sensor housing 3 into two pressure-receiving cavities 1a, pressure-inducing flow channels are respectively disposed on the sensor housing 3 corresponding to the pressure-receiving cavities 1a, and the pressure-inducing flow channels connect the outside of the sensor housing 3 with the corresponding pressure-receiving cavities 1a, and is characterized in that:

one pressurized cavity 1a is a first pressurized cavity, the other pressurized cavity 1a is a second pressurized cavity, the first pressurized cavity and the filling interlayer 25a are simultaneously connected with a first pressure source, the second pressurized cavity is connected with a second pressure source, and the second pressurized cavity is further connected with a balance chamber 25b

Wherein:

the first pressure chamber is also in communication with the filling interlayer 25 a.

The first pressure cavity is communicated with the filling interlayer 25a to form a first liquid injection area, the second pressure cavity is communicated with the balance chamber 25b to form a second liquid injection area, and the volumes of the first liquid injection area and the second liquid injection area are equal.

The first pressure-bearing cavity is communicated with the filling interlayer 25a through the corresponding pressure-guiding flow channel, and the filling interlayer 25a is connected with the first pressure source through a pipeline.

The first pressure-bearing cavity is communicated with the filling interlayer 25a through a pipeline, and the first pressure-bearing cavity is connected with the first pressure source through the corresponding pressure-leading flow passage.

The second pressure-bearing cavity is connected with the second pressure source through the corresponding pressure-guiding flow passage.

Still including installation base 2a, still be equipped with two sets of pressure chambers that draw in installation base 2a, draw the pressure chamber with draw and press the runner one-to-one still be equipped with the switch-on in the installation base 2a draw the pressure chamber with draw the confession of pressing the runner and press the runner, one draw the pressure chamber with correspond supply to press the runner to form first filling area, another draw the pressure chamber with correspond supply to press the runner to form the second filling area, first filling area with the volume in second filling area equals.

The balance chamber 25b is positioned at the bottom of the mounting base 2a, the balance chamber 25b is provided with an opening, the opening of the balance chamber 25b penetrates out of the bottom surface of the mounting base 2a, and the opening of the balance chamber 25b is provided with a sealing plug;

the equalizing chamber 25b is in communication with the pressure-drawing chamber of the second filling zone.

The pressure inducing cavity is further provided with openings, the openings of the pressure inducing cavity are communicated with the outside, the openings of the pressure inducing cavity are surrounded by annular diaphragm installation seats 4, the diaphragm installation seats 4 are annular welding bosses, isolation diaphragms 4a are buckled on the openings of the pressure inducing cavity, and the edges of the isolation diaphragms 4a are fixedly connected with the inner rings of the diaphragm installation seats 4.

Example 2:

as shown in fig. 4 to 8, an external pressure maintaining structure is characterized in that: the pressure sensor 2 is cylindrical, and positioning bosses 2d are respectively arranged on the outer walls of two end faces of the pressure sensor 2;

the outer shell is in a hollow cylindrical shape, the outer shell is covered outside the pressure sensor 2, two end parts of the outer shell face two end surfaces of the pressure sensor 2 respectively, two end parts of the outer shell are provided with positioning holes corresponding to the positioning bosses 2d respectively, the positioning bosses 2d are arranged in the corresponding positioning holes in a penetrating mode respectively, and the positioning bosses 2d are in sealing fit with the corresponding positioning holes;

the inner wall of the outer shell is separated from the outer wall of the pressure sensor 2 except the positioning boss 2d to form a closed pressure maintaining cavity 5.

Wherein:

two end faces of the pressure sensor 2 respectively protrude outwards along the axial direction around the corresponding part of the positioning boss 2d, the protrusion and the side wall of the positioning boss 2d form a leaning step 2e, and the leaning step 2e leans against the inner wall of the end part of the outer shell.

The circumferential part of the outer shell and the circumferential surface of the outer wall of the pressure sensor 2 are mutually separated to form a cylindrical cavity;

the two end parts of the outer shell are respectively separated from the end surfaces of the pressure sensors 2 except the corresponding abutting steps 2e to form two annular cavities;

the cylindrical cavity is communicated with the two annular cavities at the two ends of the cylindrical cavity, so that the pressure maintaining cavity 5 is formed.

The shell body includes two half shells 3, half shell 3 is the hollow cylindric that one end was sealed, two the end plate center of half shell 3 all runs through there are the locating hole, two the open end of half shell 3 is just right each other, two half shell 3 is followed respectively pressure sensor 2's both ends are close to each other and just are connected, in order to wrap pressure sensor 2.

The positioning boss 2d is a circular boss, and the positioning hole is a circular hole;

the openings of the two half shells 3 are matched through threads and are connected in a sealing way;

the end plates of the two half shells 3 respectively abut against the corresponding abutting steps 2 e.

The pressure sensor 2 comprises two circular membrane seats 5a and a pressure sensing membrane 5b, the two circular membrane seats 5a are arranged oppositely, the pressure sensing membrane 5b is clamped between the two membrane seats 5a, the edges of the two membrane seats 5a and the pressure sensing membrane 5b are welded, and a pressure transmission cavity is defined by the two membrane seats 5a and the pressure sensing membrane 5 b;

the two pressure transmission cavities are respectively connected with a drainage tube, the two drainage tubes respectively penetrate out of the corresponding positioning bosses 2d, and the drainage tubes are sealed with the corresponding membrane seats 5 a.

And signal leads are respectively led out from two sides of the pressure sensing film 5b, and the two signal leads respectively penetrate out of the positioning boss 2 d.

The pressure maintaining cavity 5 and any one of the drainage tubes are connected with the same external pressure source, or the pressure maintaining cavity 5 is communicated with any one of the pressure transmitting cavities.

Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.