CN113898570B

CN113898570B - Gas flow process detection device and method, air compressor unit and detection method

Info

Publication number: CN113898570B
Application number: CN202111488887.XA
Authority: CN
Inventors: 杨岳兴; 马逸天; 谢彬; 蒋文滔; 刘承洪
Original assignee: Changzhou Sabaimeige Medical Gas Equipment Co ltd
Current assignee: Changzhou Sabaimeige Medical Gas Equipment Co ltd
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2022-02-08
Anticipated expiration: 2041-12-08
Also published as: CN113898570A

Abstract

The invention relates to the technical field of detection, in particular to a gas flow process detection device, which comprises: the mounting seat is fixedly connected with the inner wall of the pipeline; the induction structure is hermetically arranged on the inner wall of the pipeline and is provided with a plurality of flow-through channels; the buffer structure is arranged between the mounting seat and the induction structure; and the probe detects the distance between the induction structure and the mounting seat. The invention provides a detection device and a detection method capable of visually reflecting the gas flow process, and can reflect various abnormal possibilities of influencing the gas flow through single parameter reaction by self state change and acquisition of probe length data. Still include an air compressor unit, adopt the gas flow process detection device, include: the trend lines of the gas flowing process at different positions can be obtained through the gas flowing process detection devices and the corresponding detection methods arranged at different positions, so that the comprehensive evaluation of the gas flowing process is realized.

Description

Gas flow process detection device and method, air compressor unit and detection method

Technical Field

The invention relates to the technical field of detection, in particular to a gas flow process detection device and method, an air compressor unit and a detection method.

Background

Medical compressed air, which is a medical gas, is widely used in hospitals and is distributed in every corner of hospital medical systems. The core equipment of the compressed air system comprises a compressor unit, an air storage tank, a drying unit, a filtering device, dew point detection, carbon monoxide detection, a control cabinet and the like.

For medical use of compressed air, the quality of the compressed air and the continuity of the supply of the air from the source are of primary concern. At present, the quality index of compressed air mainly comprises the oil content, the water content, the particle content and the like of the compressed air, and the quality index requirements can be met through the processes of effective filtration, drying and the like; the continuity of the air supply is easily affected by the faults or performance changes of multiple links of the equipment, and the instability problem of the air supply is particularly obvious.

In order to avoid the situation of the fault or the performance change affecting the normal operation of the medical system, the reasonable detection of the gas flowing process is a more effective method. In the existing compressor unit, a sensor of a single detection target such as gas pressure, flow velocity and temperature is arranged at a local circulation position, and a comprehensive evaluation result is obtained by collecting and analyzing data of various sensors, but no comprehensive detection device which is more intuitive exists.

Disclosure of Invention

The invention provides a gas flow process detection device, which can effectively solve the problems in the background technology; meanwhile, the invention also discloses a gas flow process detection method, an air compressor unit and a detection method, and the detection method has the same technical effect.

In order to achieve the purpose, the invention adopts the technical scheme that:

gas flow process detection apparatus comprising:

the mounting seat is fixedly connected with the inner wall of the pipeline, and a through channel for gas circulation is arranged in the middle of the mounting seat;

the induction structure is arranged on one side of the mounting seat, is attached to the inner wall of the pipeline, and is arranged in a sealing manner at the attaching position;

the buffer structure is arranged between the mounting seat and the induction structure and elastically buffers the motion of the induction structure relative to the mounting seat;

the probe is fixedly connected with the mounting seat or the induction structure and is used for detecting the distance between the induction structure and the mounting seat;

the induction structure comprises an elastic main body and an air guide pipe, the elastic main body is attached to the inner wall of the pipeline, a closed cavity is formed in the elastic main body, gas is filled in the cavity, and the air guide pipe penetrates through the elastic main body and forms the overflowing channel.

Furthermore, the periphery of the mounting seat is provided with an external thread, the inner wall of the pipeline is provided with an internal thread corresponding to the external thread, and the mounting seat is connected with the inner wall of the pipeline through the matching of the internal thread and the external thread.

Furthermore, the flow passage is a through round hole and is at least uniformly distributed in the area outside the set diameter range taking the circle center as the center on the induction structure.

The gas flow process detection method adopts the gas flow process detection device, takes time as an abscissa and the length value of the probe as an ordinate to establish a coordinate system, determines points on the coordinate system through the acquired data, connects the points and reacts the flow process of gas through trend.

The air compressor unit comprises the gas flowing process detection device, and a compressor unit, an air storage tank and a drying unit which are sequentially connected;

the compressor unit comprises a plurality of groups of compression units, at least one compression unit is used as a standby unit, and a first-stage filtering structure and a second-stage filtering structure are respectively arranged at the air inlet position and the air outlet position of the compression unit;

the drying unit comprises a plurality of groups of drying units, at least one drying unit is used as a standby unit, and a third-stage filtering structure and a fourth-stage filtering structure are respectively arranged at the air inlet position and the air outlet position of the drying unit;

and the gas flowing process detection device is arranged in pipelines at the outlets of the first-stage filtering structure, the second-stage filtering structure, the third-stage filtering structure and the fourth-stage filtering structure.

Further, the inner diameters of pipelines for installing the gas flow process detection device at the outlets of the filtering structures at all levels are equal.

A method for testing an air compressor assembly as described above, comprising the steps of:

when the compression unit is started, the acquisition of probe length data in the gas flow process detection device corresponding to the first-stage filtering structure and the second-stage filtering structure is synchronously started, and the data acquisition frequencies are the same;

establishing a coordinate system by taking time as an abscissa and a length value of a probe as an ordinate, determining points on the coordinate system according to data acquired by each probe, and connecting each point to respectively obtain a first walking potential line and a second walking potential line;

and independently analyzing and comparing the first trend line and the second trend line to realize the fault judgment of the first-stage filtering structure, the second-stage filtering structure and the compression unit, and starting the standby compression unit to replace the current compression unit when the abnormity occurs.

Further, the data acquisition frequency is positively correlated with the working frequency of the compression unit.

when the suction unit is started, the acquisition of probe length data in the gas flow process detection devices corresponding to the third-stage filtering structure and the fourth-stage filtering structure is synchronously started, and the data acquisition frequencies are the same;

establishing a coordinate system by taking time as an abscissa and the length value of the probe as an ordinate, determining points on the coordinate system according to data acquired by each probe, and connecting each point to respectively obtain a third walking potential line and a fourth walking potential line;

and carrying out independent analysis and comparison on the third trend line and the fourth trend line to realize fault judgment of the third-stage filtering structure, the fourth-stage filtering structure, the air storage tank and the suction drying unit, and starting the suction drying unit for standby use to replace the current suction drying unit or adjust the air storage tank when abnormality occurs.

Further, the data acquisition frequency is positively correlated with the air supply pressure of the air storage tank.

Through the technical scheme of the invention, the following technical effects can be realized:

the invention provides a detection device and a detection method capable of visually reflecting the gas flow process, which can reflect various abnormal possibilities of influencing the gas flow through single parameter reaction by self state change and acquisition of probe length data; the air compressor unit adopts the gas flowing process detection device, and can obtain trend lines of gas flowing processes at different positions through the gas flowing process detection devices arranged at different positions and corresponding detection methods, so that the comprehensive evaluation of the gas flowing processes is realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 view of a gas flow process detection device at a first angle;

FIG. 2 is a schematic view of the gas flow process detection device at a second angle;

FIG. 3 is a schematic view of the gas flow process detection device at a third angle;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is a schematic structural view of the mounting base;

FIG. 6 is an enlarged view of a portion of FIG. 1 at B;

FIG. 7 is a graph showing the line of each point in the coordinate system as the length of the probe is shortened;

FIG. 8 is a graph showing the line of each point in the coordinate system as the length of the probe is changed from short to long;

FIG. 9 is a frame diagram of an air compressor package;

FIG. 10 is a schematic view of an air compressor package;

FIG. 11 is a schematic view of the connection of the compression unit to the first stage filtration;

reference numerals: 1. a mounting seat; 11. a through passage; 2. an induction structure; 21. an overflow channel; 22. an elastic body; 23. an air duct; 3. a buffer structure; 4. a probe; 5. a lower sliding section; 6. a rising section; 7. a compressor unit; 71. a compression unit; 72. a first stage filtration structure; 73. a second stage filter structure; 8. an air reservoir; 9. a drying unit; 91. a blotting unit; 92. a third stage filtration configuration; 93. a fourth stage of filtration.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example one

As shown in fig. 1 to 6, the gas flow process detecting apparatus includes: the mounting seat 1 is fixedly connected with the inner wall of the pipeline, and a through channel 11 for gas circulation is arranged in the middle of the mounting seat; the induction structure 2 is arranged on one side of the mounting seat 1, is attached to the inner wall of the pipeline, and is arranged in a sealing mode at the attaching position, and the induction structure 2 is provided with a plurality of flow-through channels 21 for gas to flow to the through channels 11; the buffer structure 3 is arranged between the mounting seat 1 and the induction structure 2 and elastically buffers the motion of the induction structure 2 relative to the mounting seat 1; the probe 4 is fixedly connected with the mounting seat 1 or the induction structure 2 and is used for detecting the distance between the induction structure 2 and the mounting seat 1; the induction structure 2 comprises an elastic main body 22 and an air duct 23, the elastic main body 22 is attached to the inner wall of the pipeline, a closed cavity is formed inside the pipeline, air is filled in the cavity, the air duct 23 penetrates through the elastic main body 22, and an overflowing channel 21 is formed.

The invention provides a detection device capable of visually reflecting the gas flow process, which can reflect various abnormal possibilities of influencing the gas flow through the self state change and the acquisition of the length data of the probe 4 and through a single parameter reaction, and can reduce the detection difficulty and the cost.

In the installation process, the installation seat 1 can be installed in the pipeline firstly, the function of basic positioning is realized, and in order to avoid the influence on the air flow, the wall thickness of the installation seat 1 is reduced as much as possible on the premise of meeting the installation requirement of the probe 4. As a convenient installation mode, the periphery of the installation seat 1 is provided with external threads, the inner wall of the pipeline is provided with internal threads corresponding to the external threads, and the installation seat 1 and the inner wall of the pipeline are connected in a matching mode through the internal threads and the external threads, so that the convenience connection between the installation seat 1 and the pipeline is realized, and the adjustment of the initial position of installation can be flexibly realized.

After the mounting base 1 is positioned, other parts can be installed by positioning relative to the mounting base 1, a proper leading-out position needs to be selected for leading out a wire harness of the probe 4, and the sealing performance of the leading-out position is guaranteed, and all the parts can be realized by the mode in the prior art.

The installation of whole detection device can be realized in the pipeline of level, vertical or slope, but there is a condition slightly poor than other condition effect, and the condition that responds to structure 2 and be located mount pad 1 bottom, including perpendicular bottom or the bottom of slope promptly, under this kind of condition, because gaseous still need overcome response structure 2 and buffer structure 3 whole or partial gravity, can arouse the response data change of probe 4, consequently can receive certain influence on the detectivity.

Preferably, the flow passage 21 is a through circular hole and is uniformly distributed at least in the region outside the range of the set diameter centered on the center of the circle on the sensing structure 2. Through the optimization, gas tends to pass through the peripheral relative region of the induction structure 2 more, and impact force is concentrated and acts on the center of the induction structure 2, so that even when the state of the gas fluctuates, the edge of the induction structure 2 can still ensure a stable sealing state relative to the inner wall of the pipeline.

In use, the detecting device of the present invention inevitably causes a certain resistance to the flow of the gas, so that the gas is accelerated after flowing through the flow passage 21, but the acceleration is eliminated in the subsequent flow process and does not affect the subsequent flow of the gas.

For the selection of the buffer structure 3, a spring is a preferred embodiment, which is convenient for obtaining and installing, and is stable for the motion support of the sensing structure 2. Through the elasticity setting to response structure 2 for response structure 2 is realized for the sealed accessible nature elasticity of pipeline inner wall, but more importantly, when the temperature of gas promotes, the inside of cavity can expand because of the rising of temperature to improve to a certain extent and the pipeline inner wall between frictional force, otherwise, then reduce frictional force, the length change law of probe 4 can be influenced equally to this kind of condition, thereby the problem that reaction gas flows to a certain extent.

Example two

The gas flow process detection method adopts the gas flow process detection device in the first embodiment, establishes a coordinate system by taking time as an abscissa and the length value of the probe 4 as an ordinate, determines points on the coordinate system through acquired data, connects the points and reacts the flow process of gas through tendency.

In the invention, the type of the acquired data is simpler, and compared with the mode of comprehensively analyzing and comparing a plurality of groups of data to obtain a conclusion in the prior art, the invention sets the position fluctuation and the expansion state change of the induction structure 2 in the gas along with the fluctuation of the gas, and converts the gas flowing state which is difficult to be perceived in the pipeline into a visually recognizable trend line mode, thereby leading the detection conclusion to be more intuitive.

As shown in fig. 7, the width range between the top and bottom two sets of parallel dashed lines in the figure is the range of gas fluctuation in the normal case, and the fluctuation in this range is not considered as one of the abnormal cases. For the downslide section 5 in the figure, at least the following situation can be reflected:

the first condition is as follows: the gas pressure is increased, so that the impact force of the gas on the sensing structure 2 is increased, the compression amount of the buffer structure 3 is increased, and the length of the probe 4 is reduced;

case two: when the air flow passes through the blocking position, the pressure is increased due to the reduction of the flow area, and when the pressure-increased air acts on the induction structure 2, the impact force on the induction structure 2 is increased, so that the blocking generally occurs at the positions of a filtering structure, a valve body structure and the like;

case three: the gas temperature reduces, and after the temperature reduces for radially inwards retract takes place for whole response structure 2, and this kind of retraction certainly makes response structure 2 and the inner wall frictional force of pipeline reduce, thereby under equal gas pressure, the compression volume of buffer structure 3 increases, and the length of probe 4 reduces.

Although the three situations all reflect the gliding section 5 on the trend line, there is a difference, and the difference can be generally determined from the slope of the connection line between two end points of the gliding section 5, wherein the arrangement sequence of the absolute values of the slopes is as follows: case one > case three > case two.

The reason for the above sequencing is that in the actual production process, the change of gas pressure generally occurs instantaneously, and of course, the pressure change needs to be within a certain range to make the detection of the flow process meaningful, and when the sudden increase or decrease occurs to a great extent, the check should be stopped; the instantaneous body is represented in a coordinate system, and a front-back balance relation can be quickly established through the lower slide segment 5; for the blocking situation, the blocking situation generally occurs gradually, and the duration is generally long, so that the blocking situation is represented in a coordinate system and is a relatively smooth gliding process; for the reduction of the gas temperature, the volume of the sensing structure 2 is small, so the contraction or expansion process is relatively fast, but still cannot occur instantaneously, and a certain gentle deformation time needs to be passed, so the method is embodied in a coordinate system, and the slope is between the two conditions.

As shown in fig. 8, in contrast to fig. 7, when the rising section 6 is present, it can be considered that the supply pressure of the gas source is lowered or the temperature of the gas is raised.

Of course, the above cases only represent typical general cases, but do not exclude the occurrence of abnormalities other than the above cases, and when the trend line is abnormal, other related data acquisition systems can be turned on as auxiliary detection.

In the invention, the elastic arrangement of the sensing structure 2 is particularly important for the detailed division of the above situations, and the change of the friction force of the sensing structure 2 relative to the inner wall of the pipeline enables the sensitivity of the sensing to be adjusted, so that the slope of the downward sliding section 5 or the upward sliding section 6 in the above walking line can deviate according to the different situations.

EXAMPLE III

As shown in fig. 9 to 11, the air compressor set includes the gas flowing process detecting device in the first embodiment, and the compressor set 7, the air storage tank 8 and the dryer set 9 which are connected in sequence; the compressor unit 7 comprises a plurality of groups of compression units 71, at least one compression unit 71 is used as a standby unit, and a first-stage filtering structure 72 and a second-stage filtering structure 73 are respectively arranged at the air inlet position and the air outlet position of the compression unit 71; the drying unit 9 includes a plurality of sets of suction units 91, at least one suction unit 91 is used as a standby unit, and a third filtering structure 92 and a fourth filtering structure 93 are respectively arranged at an air inlet position and an air outlet position of the suction unit 91.

Wherein, the pipelines at the outlets of the first stage filtering structure 72, the second stage filtering structure 73, the third stage filtering structure 92 and the fourth stage filtering structure 93 are all provided with a gas flowing process detection device.

The air compressor unit 7 can obtain trend lines representing the gas flowing process at different positions through the gas flowing process detection devices arranged at different positions, so that preliminary comprehensive evaluation of the gas flowing process can be realized only through comparison of the trend lines under the condition that other types of sensors are not adopted for data acquisition.

The detection method of the gas flow process detection device can be as described in embodiment two, and is not described herein again.

As an optimized mode, the inner diameters of pipelines for installing the gas flow process detection device at the outlets of the filtering structures at all stages are equal, so that the comparison of all trend lines can obtain a relatively uniform reference.

Example four

A method for testing an air compressor assembly as in the third embodiment, comprising the steps of:

a1: when the compression unit 71 is started, the acquisition of length data of the probe 4 in the gas flow process detection device corresponding to the first-stage filtering structure 72 and the second-stage filtering structure 73 is synchronously started, and the data acquisition frequencies are the same;

a2: establishing a coordinate system by taking time as an abscissa and the length value of the probe 4 as an ordinate, determining points on the coordinate system according to data acquired by each probe 4, and connecting each point to respectively obtain a first walking potential line and a second walking potential line;

and A3, independently analyzing and comparing the first trend line and the second trend line, judging the faults of the first stage filtering structure 72, the second stage filtering structure 73 and the compression unit 71, and starting the standby compression unit 71 to replace the current compression unit 71 when an abnormity occurs.

Specifically, the judgment of the first walking potential line and the second walking potential line is as the judgment of the first condition to the third condition in the second embodiment, wherein the change of the gas pressure in the first condition is mainly related to the working performance of the compressor; the blocking condition in the second case mainly reflects whether the filtering structure needs to be cleaned and the problem of filtering effectiveness; and in case three, the change in gas temperature is also related to the functional performance of the compressor, etc.

Of these, it is preferable that the data acquisition frequency is in positive correlation with the operating frequency of the compression unit 71, and when the gas supply rate to the air tank 8 is high, it is preferable to find a problem in time with a higher acquisition frequency.

In the same manner, a method for detecting an air compressor set as in the third embodiment further includes the following steps:

b1, when the blotting unit 91 is started, synchronously starting the acquisition of length data of the probe 4 in the gas flow process detection device corresponding to the third-stage filtering structure 92 and the fourth-stage filtering structure 93, wherein the data acquisition frequencies are the same;

b2, establishing a coordinate system by taking time as an abscissa and the length value of the probe 4 as an ordinate, determining points on the coordinate system according to the data acquired by each probe 4, and connecting each point to respectively obtain a third walking potential line and a fourth walking potential line;

and B3, independently analyzing and comparing the third trend line and the fourth trend line to judge the faults of the third filtering structure 92, the fourth filtering structure 93, the air storage tank 8 and the compression unit 71, and starting the standby suction drying unit 91 to replace the current suction drying unit 91 or adjusting the air storage tank 8 when an abnormality occurs.

Similarly, the judgment of the third walking potential line and the fourth walking potential line is as the judgment of the first to the third cases in the second embodiment, wherein the change of the gas pressure in the first case is mainly related to the working performance of the air storage tank 8; the clogging condition in case two reflects mainly the question of whether the filter structure needs cleaning and the filtering effectiveness.

Wherein, the collection frequency of data is positively correlated with the air supply pressure of the air storage tank 8, and the problems can be found more timely.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. Gas flow process detection apparatus, comprising:

2. The gas flow process detection device according to claim 1, wherein an external thread is provided on an outer periphery of the mounting seat, an internal thread corresponding to the external thread is provided on an inner wall of the pipeline, and the mounting seat is connected with the inner wall of the pipeline by matching the internal thread and the external thread.

3. The apparatus according to claim 1 or 2, wherein the flow passage is a through circular hole and is uniformly distributed at least in a region outside a predetermined diameter range centered on a center of the circle on the sensing structure.

4. The method for detecting a gas flow process using the apparatus for detecting a gas flow process according to any one of claims 1 to 3, wherein a coordinate system is established with time as an abscissa and a length value of the probe as an ordinate, points are determined on the coordinate system by the collected data, and the points are connected and the flow process of the reaction gas is passed through the tendency.

5. An air compressor unit, which is characterized by comprising the gas flow process detection device as claimed in any one of claims 1 to 3, and a compressor unit, an air storage tank and a drying unit which are connected in sequence;

6. The air compressor assembly of claim 5, wherein the gas flow process detection device is mounted at the outlet of each stage of the filter structure with the same inner diameter of the pipeline.

7. A method of testing an air compressor package as set forth in claim 5, including the steps of:

8. The method for testing an air compressor package of claim 7, wherein the data acquisition frequency is positively correlated to the operating frequency of the compression unit.

9. A method of testing an air compressor package as set forth in claim 5, including the steps of:

10. The method of claim 9, wherein the frequency of data acquisition is positively correlated to the air tank supply pressure.