CN114111923A - Flow sensor and flow monitor - Google Patents

Abstract

A flow sensor and flow monitor, the flow sensor includes the bush, the first diversion piece, the second diversion piece, rotating part and rotational speed measuring part, the bush encloses and closes a gas flow channel, the first diversion piece and second diversion piece are connected with bush and hold in the gas flow channel each other at intervals, the rotating part holds and holds in the gas flow channel, and locate between first diversion piece and second diversion piece, the gas that flows in from the first diversion piece or second diversion piece promotes the rotating part to rotate; the rotating speed measuring part is arranged in the sleeve and used for measuring the rotating speed of the rotating part, the rotating speed of the rotating part is used for converting the rotating speed into gas flow, a first rotating shaft base is arranged at the center of the first flow guide part, a first groove is formed in the first rotating shaft base, the opening of the first groove faces the second flow guide part, and the rotating part extends into the first groove to be connected with the first rotating shaft base in a rotating mode. Through making the rotating member rotate with first pivot base and be connected, can realize flow sensor's repetitious usage, and the durability is strong, the precision is high.

Description

Flow sensor and flow monitor

Technical Field

The invention relates to the technical field of gas flow monitoring, in particular to a flow sensor and a flow monitor.

Background

The turbine type flowmeter is a velocity type flowmeter which measures the flow rate on the principle that flowing gas hits turbine blades to rotate. The rotating turbine blade forms corresponding rotating speed after being stabilized, and the flow value can be obtained by multiplying the rotating speed by the flow speed according to the relation that the rotating speed and the flow speed form a certain proportion.

The existing turbine flowmeter has poor durability, and after being used for many times, because the wear resistance of plastic materials is low, parts are easy to wear, and then the flow precision is influenced.

Disclosure of Invention

The invention aims to provide a flow sensor and a flow monitor, which can be used for multiple times, and have strong durability and high precision.

In order to realize the purpose of the invention, the invention provides the following technical scheme:

in a first aspect, the present invention provides a flow sensor, comprising a sleeve, a first flow guide member, a second flow guide member, a rotating member and a rotation speed measuring member;

the sleeve encloses an air flow channel, and the first flow guide part and the second flow guide part are both connected with the sleeve and are accommodated in the air flow channel at intervals; the rotating piece is accommodated in the airflow channel and positioned between the first flow guide piece and the second flow guide piece, and the gas flowing in from the first flow guide piece or the second flow guide piece pushes the rotating piece to rotate; the rotating speed measuring part is arranged on the sleeve and is used for measuring the rotating speed of the rotating part, and the rotating speed of the rotating part is used for being converted into the flow of gas;

the center of first water conservancy diversion spare is equipped with first pivot base, first recess has been seted up to first pivot base, first recess opening orientation second water conservancy diversion spare, the rotating member stretch into first recess with first pivot base rotates and is connected.

In one embodiment, the first spindle base is provided with a first matching portion, the first diversion member is provided with a second matching portion, and the first matching portion is connected with the second matching portion in a matching manner, so that the first spindle base is fixed on the first diversion member.

In one embodiment, the first guide member has a connecting hole, the inner wall of the connecting hole has the second matching portion, the periphery of the first rotating shaft base has the first matching portion, and the first rotating shaft base is accommodated in the connecting hole.

In one embodiment, the rotating shaft base includes a main body portion and a limiting portion, the main body portion is connected to the first flow guide member, the limiting portion is connected to the main body portion, and the first groove is formed in the limiting portion.

In one embodiment, the hardness of the stopper portion is greater than the hardness of the main body portion.

In one embodiment, a second rotating shaft base is arranged at the center of the second flow guide piece, a second groove is formed in the second rotating shaft base, the opening of the second groove faces the first flow guide piece, and the rotating piece extends into the second groove to be rotatably connected with the second rotating shaft base.

In one embodiment, the second shaft base is identical in structure to the first shaft base.

In one embodiment, the rotating member includes a rotating portion, a first rotating shaft and a second rotating shaft, the first rotating shaft and the second rotating shaft are disposed on opposite sides of the rotating portion, the first rotating shaft and the second rotating shaft both extend along an axis of the sleeve, and the first rotating shaft extends into the first groove.

In one embodiment, the rotating portion, the first rotating shaft and the second rotating shaft are detachably connected, or the rotating portion, the first rotating shaft and the second rotating shaft are of an integrated structure.

In a second aspect, the present invention also provides a flow rate monitor comprising a flow sensor according to any one of the various embodiments of the first aspect.

The first rotating shaft base is arranged at the center of the first flow guide part, the first groove is formed in the rotating shaft base, the rotating part extends into the first groove to be rotatably connected with the first rotating shaft base, and when gas enters the airflow channel from two ends of the sleeve, the flowing direction of the gas is changed by the first flow guide part or the second flow guide part, and the rotating part is pushed to rotate. At the rotating member pivoted in-process, owing to set up the pivot base and rotate with the rotating member and be connected, improved the wear resistance of the rotation junction of rotating member and first pivot base, make it can realize repetitious usage, and after the durability reinforcing, the position of rotating member more is fixed, and is rotatory more stable, consequently is favorable to improving and keeps flow sensor's detection precision.

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 of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is an exploded view of an embodiment of a flow sensor;

FIG. 2 is a cross-sectional view of an embodiment of a flow sensor;

FIG. 3a is a schematic structural view of a rotating member according to an embodiment;

fig. 3b is a schematic structural disassembly diagram of a rotating member of an embodiment.

Description of reference numerals:

10-sleeve, 11-airflow channel;

20-a first flow guide member, 21-a second matching part;

30-a second flow guide, 31-a fourth mating portion;

40-rotating part, 41-first rotating shaft, 42-second rotating shaft, 43-rotating part and 44-mounting hole;

50-a first rotating shaft base, 51-a main body part, 52-a limiting part, 53-a first groove and 54-a first matching part;

60-a second rotating shaft base, 61-a second groove and 62-a third matching part;

70-screen mesh.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Referring to fig. 1 and 2, a flow sensor according to an embodiment of the present invention includes a sleeve 10, a first flow guide member 20, a second flow guide member 30, a rotating member 40, and a rotation speed measuring member.

The sleeve 10 is generally cylindrical and encloses a generally cylindrical gas flow passage 11. The sleeve 10 may be made of plastic, including but not limited to PC (polycarbonate), ABC (acrylonitrile butadiene styrene), epoxy resin, etc. The first and second flow guide members 20 and 30 have substantially cylindrical outer peripheral surfaces, and are connected to the inner wall of the sleeve 10 and are received in the airflow passage 11 at intervals. The first and second guide members 20 and 30 are substantially shaped as a turbine, and compared to the conventional turbine, the turbine of the present embodiment is disposed in the sleeve 10 without rotating. The first and second fluid guides 20 and 30 may be made of plastic, including but not limited to PC (polycarbonate), ABC (acrylonitrile butadiene styrene), epoxy, and the like.

The rotating member 40 is accommodated in the airflow channel 11 and located between the first flow guide member 20 and the second flow guide member 30, and the rotating member 40 may be connected to any one or more of the first flow guide member 20 and the second flow guide member 30. The first and second flow guiding members 20 and 30 guide the gas, i.e., change the flow direction of the gas, so that the gas flowing in from the first or second flow guiding members 20 and 30 pushes the rotating member 40 to rotate. The material of the rotating member 40 is light weight material, so that the rotating member 40 can generate the change of the rotating speed by the small change of the flow rate of the air flow.

Specifically, when the gas flows in the gas flow channel 11, there are only two directions, namely, the first direction of the first flow guide member 20 facing the second flow guide member 30, and the second direction of the second flow guide member 30 facing the first flow guide member 20, the gas flows in the first direction and is guided by the first flow guide member 20 and then blown onto the rotary member 40, or the gas flows in the second direction and is guided by the second flow guide member 30 and then blown onto the rotary member 40, thereby pushing the rotary member 40 to rotate. The specific path of the gas flow in the first direction is as follows: the air enters the air flow channel 11 from one end of the sleeve 10, sequentially reaches the first flow guide part 20, the rotating part 40 and the second flow guide part 30, and finally is discharged from the other end of the sleeve 10; the specific path of the gas flow in the second direction is: enters the airflow channel 11 from one end of the sleeve 10, sequentially reaches the second flow guide member 30, the rotating member 40 and the first flow guide member 20, and finally is discharged from the other end of the sleeve 10.

The rotation speed measuring member is provided to the sleeve 10 and measures a rotation speed of the rotary member 40, and the rotation speed of the rotary member 40 is converted into a flow rate of the gas. It can be understood that, when the rotating speed of the rotating member 40 is faster, which indicates that the flow rate of the gas is faster, the rotating speed of the rotating member 40 can be accurately measured by the rotating speed measuring member, and then the specific value of the gas flow can be obtained by multiplying the corresponding relationship between the rotating speed and the flow rate by the time.

In this embodiment, by arranging the rotating member 40 between the first flow guide member 20 and the second flow guide member 30, the flow direction of the gas entering the gas flow channel 11 from the two ends of the sleeve 10 is changed by the first flow guide member 20 or the second flow guide member 30 to push the rotating member 40 to rotate, the rotating speed of the rotating member 40 is measured through the rotating speed measurement emergency, an accurate gas flow value can be obtained according to the corresponding relationship between the rotating speed and the flow, and the flow measurement of the bidirectional gas flow is realized.

Specifically, the rotation speed measuring part includes an infrared emitting unit and an infrared receiving unit, the infrared emitting unit and the infrared receiving unit are relatively disposed at two radial sides of the rotating part 40, the infrared emitting unit and the infrared receiving unit are disposed at the outer side of the flow sensor and keep a distance from the flow sensor, the infrared emitting unit is used for emitting infrared rays, and the infrared receiving unit is used for receiving infrared rays.

Wherein, at the pivoted in-process of rotating member 40, the infrared ray that infrared emission unit transmitted rotates the round at rotating member 40 and can pass through twice for infrared receiving unit can receive the infrared ray at two time points, and remaining time can't receive the infrared ray because of sheltering from of rotating member 40, receives the time interval of infrared ray through measuring infrared receiving unit, can obtain the rotational speed of rotating member 40, and then can calculate the flow that obtains the air current. It is understood that the material of the rotating member 40 should not transmit infrared rays in order to block infrared rays. The distance between the connecting line of the infrared transmitting unit and the infrared receiving unit and the rotating shaft of the rotating piece 40 is set as required, and the infrared transmitting unit and the infrared receiving unit aim at preventing infrared rays from being blocked by the rotating shaft of the rotating piece 40 and only being blocked by the blade of the rotating piece 40 in the process of infrared transmitting and receiving, so that the infrared rays in some time can be received and prevented from being blocked by the rotating shaft and cannot be received all the time.

At present, the conventional mode of measuring the flow of gas by utilizing the rotation of the turbine blade needs a relatively complex measuring structure to measure the rotation speed of the turbine blade, occupies a large space and cannot be used in small-sized equipment. Compare in present measuring method, the cooperation of infrared ray emission unit and infrared ray receiving element is passed through to this embodiment, and the measuring obtains the rotational speed of rotating member 40 through measuring the time interval that the infrared ray is received, and then obtains the mode of the flow of air current, does not need complicated measurement structure, and occupation space is little, can use in miniature equipment, and it is very convenient to use.

Optionally, the first flow guiding element 20 is detachably connected to the sleeve 10, and the second flow guiding element 30 is integrated with the sleeve 10. The sleeve 10 is provided with a limiting portion 52, the first flow guiding element 20 is provided with a fixing structure corresponding to the limiting portion 52, and after the first flow guiding element 20 and the sleeve 10 are assembled, the fixing structure is combined with the limiting portion 52, so that the first flow guiding element 20 is fixed and connected with the sleeve 10. The detachable structure of the first diversion piece 20 enables the assembly of each component of the flow sensor to be more convenient, the combination of the fixed structure and the limiting part 52 is fixed, so that the position of the first diversion piece 20 after being fixed is more stable, meanwhile, the second diversion piece 30 and the sleeve 10 are of an integrated structure, therefore, the position of the second diversion piece 30 is fixed, the stability of the fixed positions of the first diversion piece 20 and the second diversion piece 30 is favorably improved, the rotating process of the rotating piece 40 is further enabled to be more stable, the abrasion between the rotating piece 40 and the first diversion piece 20 and the second diversion piece 30 is favorably reduced, the durability is improved, and the measuring result is enabled to be more accurate.

Optionally, the taper of the sleeve far away from the first flow guide part is different, specifically, the diameter of the inner wall of the sleeve increases progressively from the first flow guide part to the second flow guide part in a stepped manner, the second flow guide part is arranged in the middle of the sleeve, and the sleeve located on one side, far away from the first flow guide part, of the second flow guide part has two tapers. The sleeve with two taper structures is used for matching and installing the disposable filter, the disposable filter is connected with the disposable mouthpiece, and a patient exhales into the flow sensor through the disposable mouthpiece. In the test process of different times or between different people, only the disposable mouthpiece and the disposable filter need to be replaced, the cost is lower, and the flow sensor can be cleaned and disinfected, thereby being beneficial to avoiding cross infection.

Optionally, a screen 70 is provided on the side of the second flow guiding member 30 away from the first flow guiding member 20, and the screen 70 is used to prevent foreign materials from entering between the two flow guiding members.

The first rotating shaft base 50 is arranged at the center of the first flow guide part 20, the first rotating shaft base 50 is provided with a first groove 53, the opening of the first groove 53 faces the second flow guide part 30, the side wall and the bottom wall of the first groove 53 are both hard materials with high strength, the abrasion resistance is high, and the rotating part 40 extends into the first groove 53 to be rotatably connected with the first rotating shaft base 50. Specifically, the rotating member 40 may be rotatably connected to only the first groove 53, or may be rotatably connected to both the first groove 53 and the second guide member 30; similarly, the second diversion member 30 can also have a structure similar to the first rotation shaft base 50 of the first diversion member 20, such that the rotation member 40 can be rotatably connected with the structure alone or with the structure and the first groove 53.

By arranging the sleeve 10, the first flow guide part 20 and the second flow guide part 30, the sleeve 10 encloses to form the airflow channel 11, and guides the gas entering the airflow channel 11 to push the rotating part 40 to rotate, then the rotating speed of the rotating part 40 is measured by the rotating speed measuring part and is converted into the flow of the gas, and the bidirectional flow measurement of the gas is realized; through set up first pivot base 50 at the center of first water conservancy diversion spare 20, and first recess 53 has been seted up to this first pivot base 50, revolving part 40 stretches into this first recess 53 and is rotated with first pivot base 50 and be connected, at revolving part 40 pivoted in-process, the wear resistance of the rotation junction of revolving part 40 with first pivot base 50 has been improved, make it can realize repetitious usage, and after the wearing and tearing of this rotation junction reduce, be favorable to revolving part 40 more stable at rotatory in-process, and consequently improve and keep flow sensor's detection precision.

In one embodiment, referring to fig. 2, the first shaft base 50 is provided with a first engaging portion 54, the first air guiding member 20 is provided with a second engaging portion 21, and the first engaging portion 54 is engaged with the second engaging portion 21 for fixing the first shaft base 50 on the first air guiding member 20.

Specifically, the first matching portion 54 and the second matching portion 21 are connected in a matching manner including, but not limited to, a threaded connection and a pin connection, when the matching connection is a threaded connection, the first matching portion 54 is a thread, the second matching portion 21 is a threaded hole, and by adjusting the threaded connection degree of the first matching portion 54 and the second matching portion 21, the position of the first rotating shaft base 50 can be adjusted, so as to adjust the installation of the rotating member 40; when this cooperation connected mode is the bolt connection, first cooperation portion 54 is the bolt, and second cooperation portion 21 is the bolt hole, through set up a plurality of bolt card posts on the bolt, adjusts different bolt card posts and bolt hole cooperation and is connected, can adjust first pivot base 50's position, and then makes the regulation to the installation of rotating member 40.

Through the arrangement of the first matching part 54 and the second matching part 21, the first rotating shaft base 50 is matched and connected with the first flow guide part 20, so that the first rotating shaft base 50 and the first flow guide part 20 are more convenient to assemble, the fixing position of the first rotating shaft base 50 is more stable, further, the rotating connection part of the rotating part 40 and the first rotating shaft base 50 is more stable, and the rotating part 40 and the first rotating shaft base 50 are prevented from being more seriously abraded when the rotating part 40 is not stable in position in the rotating process, so that the abrasion resistance of the rotating connection part of the rotating part 40 and the first rotating shaft base 50 is improved, the multiple use can be realized, and after the abrasion of the rotating connection part is reduced, the rotating part 40 is more stable in rotation, and the detection precision of the flow sensor is improved and kept; meanwhile, when the flow sensor is initially assembled, the fixing degree of the rotating member 40 can be adjusted by adjusting the matching degree of the first rotating shaft base 50 and the first flow guide member 20, which is beneficial to maintaining the rotating stability of the rotating member 40 and improving the durability and the detection precision of the flow sensor.

In one embodiment, referring to fig. 2, a connection hole is formed in the center of the first flow guiding element 20, the connection hole may be a through hole or a blind hole, a second matching portion 21 is disposed on an inner wall of the connection hole, a first matching portion 54 is disposed on the periphery of the first rotating shaft base 50, and after the first rotating shaft base 50 is connected to the first flow guiding element 20 in a matching manner, the first rotating shaft base 50 is received in the connection hole.

Optionally, a boss is disposed at the center of the first flow guiding element 20, a second matching portion 21 is disposed at the periphery of the boss, the first rotating shaft base 50 is provided with a connecting hole, a first matching portion 54 is disposed on the inner wall of the connecting hole, and after the first rotating shaft base 50 is connected with the first flow guiding element 20 in a matching manner, the first rotating shaft base 50 is sleeved on the periphery of the boss.

Through seting up the connecting hole at the center of first water conservancy diversion spare 20, and the inner wall of this connecting hole is equipped with second cooperation portion 21, the periphery of first pivot base 50 is equipped with first cooperation portion 54, make first pivot base 50 and first water conservancy diversion spare 20 cooperation be connected the back holding in this connecting hole, be favorable to practicing thrift first pivot base 50 and first water conservancy diversion spare 20's assembly space, provide sufficient rotation space for rotating member 40, and make flow sensor's structure more compact, the flow error after having reduced gas admission air current passageway 11, the testing result is improved.

In one embodiment, referring to fig. 2, the first shaft base 50 includes a main body 51 and a limiting portion 52, the main body 51 is connected to the first fluid guiding element 20, the limiting portion 52 is connected to the main body 51 and located at an end of the first shaft base 50 close to the second fluid guiding element 30, and the first groove 53 is formed on the limiting portion 52. The material of the main body 51 includes, but is not limited to, metal materials such as copper, aluminum, stainless steel, etc., or plastics, and the stopper 52 may be the same material as the main body 51 or different materials.

Specifically, when the material of the position-limiting portion 52 is the same as that of the main body portion 51, if the main body portion 51 and the position-limiting portion 52 are both made of plastic, although the cost is low, the strength is low, and the position-limiting portion 52 is easily worn by the rotating member 40 after the flow sensor is used for a single time, so that the rotating motion of the rotating member 40 is unstable, and the detection result is affected. Therefore, in order to achieve the purpose of multiple uses, the main body 51 and the limiting portion 52 should preferably be made of hard metal materials with high strength, such as copper, aluminum, stainless steel, and the like, so as to increase the wear resistance of the limiting portion 52 at the first groove 53, reduce the wear of the rotating member 40 on the limiting portion 52 in the rotating process, and make the rotating motion more stable, thereby achieving better detection accuracy.

When the material of the position-limiting part 52 is different from that of the main body part 51, the main body part 51 may be plastic or hard metal, the position-limiting part 52 should preferably be a high-strength and wear-resistant material, the material of the position-limiting part 52 includes, but is not limited to, artificial gems, including, but not limited to, artificial ruby, artificial sapphire and zircon, metal or alloy including, but not limited to, copper, aluminum and stainless steel, and natural gems, including, but not limited to, diamond, natural ruby and natural sapphire. The connection of the position-limiting portion 52 and the main body 51 includes, but is not limited to, adhering with glue, connecting by screw fitting, or embedding the position-limiting portion 52 in the main body 51.

By dividing the first rotating shaft base 50 into the main body part 51 and the limiting part 52, the limiting part 52 is made of a material with high strength and good wear resistance, and the main body part 51 can be made of the same material as the limiting part 52 or other materials with lower strength, so that the cost is saved while the strength of the limiting part 52 where the first groove 53 is located is ensured; meanwhile, because spacing portion 52 is high strength, the material that the wearability is good, therefore the rotating member 40 stretches into first recess 53 and the rotation junction intensity of first pivot base 50 is great, this junction is also more stable promptly, when having avoided rotating member 40 to be unstable in rotatory in-process position, to self and the more serious wearing and tearing that first pivot base 50 caused, make it can realize repetitious usage, and after the wearing and tearing of this rotation junction reduce, be favorable to rotating member 40 more stable at rotatory in-process, still be favorable to improving and keep flow sensor's detection precision.

In one embodiment, referring to fig. 2, the hardness of the position-limiting portion 52 is greater than the hardness of the main body portion 51.

The hardness of the limiting part 52 is greater than that of the main body part 51, so that the strength of the limiting part 52 where the first groove 53 is located is ensured, and the cost is saved; meanwhile, when spacing portion 52 is high strength, when the material that the wearability is good, rotating member 40 stretches into first recess 53 and first pivot base 50 rotation junction intensity is great, this junction is also more stable promptly, when having avoided rotating member 40 to be unstable in rotatory in-process position, to self and the more serious wearing and tearing that first pivot base 50 caused, make it can realize repetitious usage, and after this wearing and tearing that rotate the junction reduce, be favorable to rotating member 40 more stable at rotatory in-process, still be favorable to improving and keep flow sensor's detection precision.

In one embodiment, referring to fig. 2, a second rotating shaft base 60 is disposed at the center of the second flow guiding member 30, a second groove 61 is disposed on the second rotating shaft base 60, the second groove 61 opens toward the first flow guiding member 20, and the rotating member 40 extends into the second groove 61 to be rotatably connected with the second rotating shaft base 60. Specifically, when the second guide member 30 is provided with the second rotating shaft base 60 at the center, the rotating member 40 may be rotatably connected to the second rotating shaft base 60 only, or may be rotatably connected to the second rotating shaft base 60 and the first guide member 20 at the same time, and when the first guide member 20 is provided with the first rotating shaft base 50, the rotating member 40 may also be rotatably connected to the first rotating shaft base 50 and the second rotating shaft base 60 at the same time.

The second rotating shaft base 60 is arranged at the center of the second flow guide part 30, the second rotating shaft base 60 is provided with the second groove 61, the rotating part 40 extends into the second groove 61 to be rotatably connected with the second rotating shaft base 60, and in the rotating process of the rotating part 40, the second rotating shaft base 60 is rotatably connected with the rotating part 40, so that the wear resistance of the rotating connection position of the rotating part 40 and the second rotating shaft base 60 is improved, the rotating part can be used for multiple times, after the durability is enhanced, the position of the rotating part 40 is more fixed, the rotation is more stable, and the detection precision of the flow sensor is improved; meanwhile, when the rotating member 40 is simultaneously rotatably connected with the first rotating shaft base 50 and the second rotating shaft base 60, the wear resistance of the rotating connection between the rotating member 40 and the first rotating shaft base 50 and the second rotating shaft base 60 is enhanced, so that the rotating member 40 is more stable in the rotating process, and the detection precision of the flow sensor is improved and maintained.

In one embodiment, referring to fig. 1 and 2, the second hinge base 60 has the same structure as the first hinge base 50. Specifically, the second rotating shaft base 60 is provided with a third matching portion 62, the second flow guiding element 30 is provided with a fourth matching portion 31, the third matching portion 62 is connected with the fourth matching portion 31 in a matching manner, so that the second rotating shaft base 60 is fixed on the second flow guiding element 30, and the connection manner of the third matching portion 62 and the fourth matching portion 31 is the same as that of the first matching portion 54 and the second matching portion 21, which is not described herein again; the second shaft base 60 has the same structure as the stopper portion 52 and the body portion 51 of the first shaft base 50, and the stopper portion 52 and the body portion 51 are made of the same material.

The second rotating shaft base 60 and the second flow guide part 30 are more stably fixed by making the structure of the second rotating shaft base 60 the same as that of the first rotating shaft base 50, meanwhile, the strength of the rotating joint of the rotating part 40 extending into the second groove 61 and the second rotating shaft base 60 is higher, the joint is more stable, the abrasion of the rotating part 40 and the second rotating shaft base 60 caused by unstable position in the rotating process is avoided, the rotating part can be used for multiple times, after the durability is enhanced, the rotating part 40 rotates more stably, and the detection precision of the flow sensor is improved; when the rotating member 40 rotates with the first rotating shaft base 50 and the second rotating shaft base 60 to be connected at the same time, namely, the rotating member 40 simultaneously extends into the first groove 53 and the second groove 61 to rotate with the first rotating shaft base 50 and the second rotating shaft base 60 to be connected, because the strength of the joint of the first rotating shaft base 50, the second rotating shaft base 60 and the rotating member 40 is large, the rotation of the rotating member 40 is more stable, and the improvement and the detection precision of the flow sensor are more facilitated.

In one embodiment, referring to fig. 2, 3a and 3b, the rotating member 40 includes a rotating portion 43, a first rotating shaft 41 and a second rotating shaft 42, the first rotating shaft 41 and the second rotating shaft 42 are disposed on opposite sides of the rotating portion 43, and the first rotating shaft 41 and the second rotating shaft 42 both extend along the axis of the sleeve 10. The rotating portion 43 extends along the radial direction of the sleeve 10, and the whole of the rotating portion 43 may be a rectangular sheet, the first rotating shaft 41 and the second rotating shaft 42 are respectively connected to the middle portions of two sides of the rotating portion 43, the first rotating shaft 41 and the second rotating shaft 42 are located in the extending direction of the same straight line, and the rotating portion 43 is symmetrically arranged relative to the first rotating shaft 41 and the second rotating shaft 42.

Alternatively, four corners of the rectangle of the rotating portion 43 may be set to be circular arc transition, so as to form a shape of a substantially rounded rectangle, so that the flow field is stable when the airflow passes through, and turbulence and turbulent flow are reduced.

The first diversion part 20 is provided with a first rotating shaft base 50, the first rotating shaft base 50 is provided with a first groove 53, the first rotating shaft 41 extends into the first groove 53 to be rotatably connected with the first rotating shaft base 50, the optional second diversion part 30 is provided with a second rotating shaft base 60, the second rotating shaft base 60 is provided with a second groove 61, the second rotating shaft 42 extends into the second groove 61 to be rotatably connected with the second rotating shaft base 60, and the rotation can be respectively established with the first rotating shaft base 50 and the second rotating shaft base 60 through any one of the first rotating shaft 41 and the second rotating shaft 42, or can be simultaneously rotatably connected with the first rotating shaft base 50 and the second rotating shaft base 60.

Optionally, the bottom wall of the first groove 53 and/or the second groove 61 is tapered, the taper angle of the taper is not limited, and the end of the first rotating shaft 41 and/or the second rotating shaft 42 may be in a shape of a needle point to facilitate the formation of the rotating connection.

Specifically, the rotating portion 43 has a distance from the sleeve 10, the first flow guide member 20 and the second flow guide member 30, so that the rotating portion 43 is prevented from contacting other parts in the rotating process, the rotating portion 43 is prevented from being damaged, and the measuring accuracy is further influenced.

The rotating member 40 is divided into the first rotating shaft 41, the second rotating shaft 42 and the rotating portion 43, so that it is beneficial to design each portion of the rotating member 40, wherein the shape of the rotating portion 43 is substantially rectangular, the end portions of the first rotating shaft 41 and the second rotating shaft 42 can be needle-point-shaped and are respectively rotatably connected with the first groove 53 and the second groove 61, so that the rotating process of the rotating member 40 is more stable, and the accuracy of the detection result is improved.

In one embodiment, referring to fig. 3a and 3b, the rotating portion 43, the first rotating shaft 41 and the second rotating shaft 42 are detachably connected, specifically, two mounting holes 44 may be formed in the center of the rotating portion 43, and a rod-shaped rotating shaft passes through the rotating portion 43, and the rotating portion 43 divides the rod-shaped rotating shaft into the first rotating shaft 41 and the second rotating shaft 42; mounting holes 44 may be formed in two opposite sides of the rotating portion 43, and the first rotating shaft 41 and the second rotating shaft 42 are respectively inserted into the corresponding mounting holes 44 to be connected; the first rotating shaft 41 and the second rotating shaft 42 may be respectively glued to opposite sides of the rotating portion 43. Alternatively, the rotating portion 43, the first rotating shaft 41 and the second rotating shaft 42 are integrally formed.

Specifically, the rotation axis needs to adopt the material that high strength, wearability are good, make it corresponding with the material of spacing portion 52, when first pivot 41 stretched into first recess 53 and rotate with the spacing portion 52 of first pivot base 50 and be connected, because first pivot 41 and spacing portion 52 are the material that high strength, wearability are good, consequently can prolong life between them, and then prolong flow sensor's life, make it possess repetitious usage's ability, and keep the rotational stability of rotating member 40 in the use, improve the accuracy nature of testing result.

Optionally, the rotating portion 43, the first rotating shaft 41 and the second rotating shaft 42 are made of the same material, and at this time, in order to satisfy the performance of high strength and good wear resistance of the first rotating shaft 41 and the second rotating shaft 42, the rotating portion 43 is made of the same material, but although the material has high strength and good wear resistance, the material has poor sensitivity to the air flow, and thus the accuracy of the detection result is affected, and therefore, the rotating portion 43, the first rotating shaft 41 and the second rotating shaft 42 are preferably made of different materials.

Optionally, the rotating portion 43, the first rotating shaft 41 and the second rotating shaft 42 are made of different materials, the materials of the first rotating shaft 41 and the second rotating shaft 42 include, but are not limited to, metal or alloy, and the material of the rotating portion 43 includes, but is not limited to, plastic, so that the strength of the first rotating shaft 41 and the second rotating shaft 42 is high and the rotating portion 43 is light and thin. Specifically, the rotating portion 43 may be a plastic sheet having a uniform thickness and being opaque to infrared rays.

The rotating part 43, the first rotating shaft 41 and the second rotating shaft 42 are detachably connected, so that different designs are made on the materials of the rotating part 43, the first rotating shaft 41 and the second rotating shaft 42 respectively, specifically, the rotating part 43 is made of a light and thin material, the sensitivity of the rotating part 43 to air flow is improved, and the detection accuracy is further improved; the first rotating shaft 41 and the second rotating shaft 42 are made of high-strength and good-wear-resistance materials and correspond to the limiting part 52 with high strength and good wear resistance, so that the abrasion between the first rotating shaft 41 and the first rotating shaft base 50 and/or between the second rotating shaft 42 and the second rotating shaft base 60 in the rotating process of the rotating piece 40 is reduced, the service life of the flow sensor is further prolonged, the flow sensor has the capability of being used for multiple times, the rotating stability of the rotating piece 40 is kept in the using process, and the accuracy of a detection result is improved.

In addition, the invention also provides a flow rate monitor, which comprises the flow rate sensor provided by any one of the above embodiments. Specifically, this flow monitor can be hand-held type lung function appearance, breathing machine, oxygenerator etc. wherein, flow sensor's sleeve 10's one end can link to each other with the patient, and the other end links to each other with flow detector, and when the patient exhales or breathes in, can monitor the gas of patient exhalation or inspiratory gas flow, and then can be according to whether this flow is in the standard value that accords with normal people, judge whether normal is breathed to the patient to and whether carry out relevant treatment etc..

Through making the flow monitor include this flow sensor, can obtain similar technological effect, at the rotating member 40 pivoted in-process promptly, improved the wear resistance of rotating member 40 with first pivot base 50's rotation junction, make it can realize repetitious usage, and after the durability reinforcing, the position of rotating member 40 is more fixed, and is rotatory more stable, consequently is favorable to improving flow sensor's detection precision.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.

Claims (10)

1. A flow sensor is characterized by comprising a sleeve, a first flow guide part, a second flow guide part, a rotating part and a rotating speed measuring part;

the sleeve encloses an air flow channel, and the first flow guide part and the second flow guide part are both connected with the sleeve and are accommodated in the air flow channel at intervals; the rotating piece is accommodated in the airflow channel and positioned between the first flow guide piece and the second flow guide piece, and the gas flowing in from the first flow guide piece or the second flow guide piece pushes the rotating piece to rotate; the rotating speed measuring part is arranged on the sleeve and is used for measuring the rotating speed of the rotating part, and the rotating speed of the rotating part is used for being converted into the flow of gas;

the center of first water conservancy diversion spare is equipped with first pivot base, first recess has been seted up to first pivot base, first recess opening orientation second water conservancy diversion spare, the rotating member stretch into first recess with first pivot base rotates and is connected.

2. The flow sensor according to claim 1, wherein the first shaft base is provided with a first engaging portion, and the first flow guide member is provided with a second engaging portion, and the first engaging portion is engaged with the second engaging portion for fixing the first shaft base to the first flow guide member.

3. The flow sensor according to claim 2, wherein the first guide member has a connection hole, the second engagement portion is provided on an inner wall of the connection hole, the first engagement portion is provided on an outer periphery of the first shaft base, and the first shaft base is received in the connection hole.

4. The flow sensor according to claim 2, wherein the first spindle base includes a main body portion and a stopper portion, the main body portion is connected to the first fluid guide member, the stopper portion is connected to the main body portion, and the first groove is provided in the stopper portion.

5. The flow sensor according to claim 4, wherein the stopper portion has a hardness greater than that of the main body portion.

6. The flow sensor according to claim 1, wherein a second shaft base is disposed at the center of the second flow guiding member, a second groove is disposed on the second shaft base, the second groove opens toward the first flow guiding member, and the rotating member extends into the second groove to be rotatably connected to the second shaft base.

7. The flow sensor of claim 6, wherein the second spindle base is identical in construction to the first spindle base.

8. The flow sensor according to claim 1, wherein the rotating member includes a rotating portion, a first shaft and a second shaft, the first shaft and the second shaft are disposed on opposite sides of the rotating portion, the first shaft and the second shaft both extend along an axis of the sleeve, and the first shaft extends into the first groove.

9. The flow sensor according to claim 4, wherein the rotating portion, the first rotating shaft and the second rotating shaft are detachably connected, or the rotating portion, the first rotating shaft and the second rotating shaft are an integrated structure.

10. A flow monitor comprising a flow sensor according to any one of claims 1 to 9.

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