CN116222687A - Gas flow metering device - Google Patents

Abstract

The application discloses a gas flow metering device, which comprises a shell, a cover body and a module valve assembly, wherein an opening is formed in the shell; the cover body is covered on the opening and forms a containing cavity, and an air flow inlet channel and an air flow outlet channel are arranged on the cover body; the module valve assembly has an air inlet and an air outlet, the air inlet is communicated with the air inlet channel, the air outlet is communicated with the air outlet channel, and the module valve assembly has a first mounting orientation and a second mounting orientation; a first installation limiting structure and a second installation limiting structure are arranged in the shell; when the module valve assembly is in the first installation position, the module valve assembly is fixed through the first installation limiting structure; when the module valve assembly is in the second installation orientation, the module valve assembly is fixed through the second installation limiting structure. The gas flow metering device has the advantages of simple structure, convenience in installation and the like; the assembly has good universality and can adjust the assembly mode according to the use environment.

Description

Gas flow metering device

Technical Field

The application belongs to the gas flow measurement field, especially relates to a gas flow measurement device.

Background

This section provides only background information related to the present application and is not necessarily prior art.

Gas flow metering devices are widely used in production and life to meet the metering needs of fluids in production and life. Currently, despite the wide variety of gas flow metering devices, there are a number of drawbacks. For example, the current gas flow metering device has poor component universality due to unreasonable design and layout, so that the similar products have more component types; meanwhile, the production of the product has the problems of complex installation process, low assembly efficiency, high assembly cost, low reliability and the like. Taking gas table as an example, current gas table needs to divide into left table and right table according to the installation requirement according to the direction of admitting air and giving vent to anger, in actual production process, because the design is unreasonable, leads to the component parts of left table and right table not to have interchangeability, brings very big puzzlement for the management work of material, still has the problem such as material pile up, backlog simultaneously, makes material management cost higher. In addition, due to unreasonable design, the problems of complex gas meter installation process, lower assembly efficiency, high production cost and the like are caused.

Disclosure of Invention

The application provides a gas flow metering device, aims at solving the problems of installation, cost, material management and the like of the gas flow metering device. The aim is achieved by the following technical scheme:

The application discloses a gas flow metering device, which comprises a shell, a cover body and a module valve assembly; an opening is arranged on the shell; the cover body is covered on the opening and forms a containing cavity, and an air flow inlet channel and an air flow outlet channel are arranged on the cover body; the module valve assembly is provided with an air inlet and an air outlet, the module valve assembly is arranged in the accommodating cavity, the air inlet is communicated with the air inlet channel, the air outlet is communicated with the air outlet channel, and the module valve assembly is provided with a first mounting position and a second mounting position; a first installation limiting structure and a second installation limiting structure are arranged in the shell; when the module valve assembly is in the first installation position, the module valve assembly is fixed through the first installation limiting structure; when the module valve assembly is in the second installation orientation, the module valve assembly is fixed through the second installation limiting structure.

This application is through making module valve subassembly have first installation position and second installation position, and then makes gas flow metering device select the installation mode according to actual need, and then makes gas flow metering device only need a casing alright make fluid flow metering device satisfy different installation needs, promotes the commonality of material effectively then, reduces the stock pressure of material, reduces the management degree of difficulty of material.

As some preferred aspects of the present application, the cover body is further optionally made to have a laterally symmetrical structure, and the air flow inlet channel and the air flow outlet channel are symmetrical with respect to a symmetry plane of the cover body; and the first installation limiting structure and the second installation limiting structure are symmetrical relative to the symmetry plane.

The cover body is of a bilateral symmetry structure, the gas inlet channel and the gas outlet channel are symmetrical relative to the symmetry plane of the cover body, and the first installation limiting structure and the second installation limiting structure are symmetrical relative to the symmetry plane, so that the cover body and the shell have better universality, and the position of the gas inlet channel and the gas outlet channel can be adjusted by using the cover body and the shell; to meet the installation requirements of the fluid flow metering device. Taking a gas meter as an example, a left meter or a right meter can be assembled by a set of components; the variety of materials is greatly reduced, and then the stock pressure and the material management pressure of the materials are reduced; meanwhile, the material can be purchased in batches, so that the material purchasing cost and the product production cost are reduced.

As some preferred aspects of the present application, the first and second mounting limit structures are further selectively provided on a bottom wall of the housing, or the first and second mounting limit structures are selectively provided on an inner side wall of the housing. When the first mounting limiting structure comprises a first clamping part, the module valve assembly is in a first mounting position, and the module valve assembly is in clamping connection with the first clamping part; meanwhile, the second installation limiting structure comprises a second clamping part, and when the module valve assembly is in a second installation position, the module valve assembly is connected with the second clamping part in a clamping mode.

According to the method, the first clamping part is arranged on the first installation limiting structure, and the second installation limiting structure is arranged on the second clamping part; the module valve assembly can be fixed in the accommodating cavity through the first clamping part or the second clamping part; the arrangement mode does not need redundant connecting pieces for connection; the assembly process of the fluid flow metering device is effectively simplified, and the assembly efficiency is improved.

As some preferred aspects of the present application, the bottom wall between the first installation limiting structure and the second installation limiting structure is further provided with a limiting supporting structure, and the module valve assembly is abutted to the limiting supporting structure.

According to the valve assembly fixing device, the limiting support structure is arranged, so that the auxiliary limiting effect can be achieved on the valve assembly of the module under the effect of the limiting support structure, and the valve assembly of the module is fixed in the shell more firmly; the module valve assembly is prevented from shifting in the shell during transportation, and the reliability of the product is further improved.

As some preferred aspects of the present application, the gas flow metering apparatus further optionally further comprises a filter unit disposed within the receiving chamber and the barrier is disposed between the gas flow inlet passage and the gas flow inlet, the gas flow inlet passage delivering gas flow through the filter unit to the gas flow inlet.

The utility model provides a through setting up filter unit, can get into the air current that the air current admission passage got into and get into the air current entry after filtering, and then make module valve subassembly obtain effective protection, avoid the foreign matter in the gas to cause the influence to the measurement precision of module valve subassembly, the normal work of valve, and then promote the life of module valve subassembly.

As some preferred aspects of the present application, the module valve assembly further optionally includes a metering module and a valve assembly; the filter unit installation position is arranged on the inner side wall of the shell, the filter unit installation position is positioned between the opening and the metering module, and the filter unit is fixed at the filter unit installation position.

According to the filter unit installation position setting device, the filter unit is fixed in the shell through the filter unit installation position, and the filter unit is in adaptive connection with the inner side wall of the shell, so that the installation process of the filter unit is simplified.

As some preferred aspects of the present application, the inner side wall of the housing is further optionally provided with a plurality of support ribs extending toward the opening, and extending ends of the plurality of support ribs form the filter unit mounting position.

According to the filter unit installation structure, the filter unit installation position is formed by a plurality of supporting ribs arranged on the inner side wall of the shell, and the filter unit can be positioned and installed through the action of the supporting ribs; simultaneously, the mechanical properties of casing can also be improved to the supporting rib, specifically can promote the overall stability and the local stability of casing, and under the condition that satisfies mechanical requirement, the casing can be made lighter and thinner, and then reduces the materials cost of casing. In order to adjust the installation position of the filter unit according to the installation requirement of the fluid flow metering device, a plurality of supporting ribs can be arranged on the inner side wall of the shell, so that the installation position of the filter unit can be adjusted according to the first installation position and the second installation position of the module valve assembly, and the position of the filter unit can be adjusted according to the requirement.

As some preferred aspects of the present application, the filter unit is further selectively provided in a plate shape, and a buffer chamber is formed between the cover body and the filter unit.

This application is through making filter unit be platy setting, can make filter unit can be when satisfying the filtration requirement, is convenient for realize filter unit's installation. In addition, the buffer containing cavity is formed between the cover body and the filtering unit, so that foreign matters in the air flow can be collected and stored, and subsequent centralized treatment is facilitated; furthermore, through forming the buffering appearance chamber, can also prolong clearance and maintenance cycle, reduce fluid flow metering device's maintenance cost.

As some preferred embodiments of the present application, a limit structure is further optionally provided on a side of the cover body opposite to the housing, and the filter unit is pressed on the filter unit mounting position by the limit structure.

According to the filter unit, the limiting structure body is arranged on the cover body, and the filtering unit can be pressed on the filtering unit installation position by the limiting structure body in the process of connecting the cover body with the shell; the filter unit can be more firmly fixed at a set position in the shell; meanwhile, a connecting piece is not required to be additionally arranged to fix the filtering unit, so that the installation process of the fluid flow measuring unit is simplified, the installation difficulty and the installation cost of the fluid flow measuring unit are reduced, and the installation efficiency is improved.

As some preferred aspects of the present application, the gas flow metering device further optionally further comprises a sealing body, wherein the periphery of the opening is provided with a sealing body mounting position, and the sealing body is pressed on the sealing body mounting position through the cover body so as to form an annular sealing area between the cover body and the housing.

The sealing body is used for realizing sealing connection between the cover body and the shell, and an annular sealing area is formed at the periphery of the opening; the problem of air leakage of the fluid flow metering device is avoided.

The foregoing description is only an overview of the embodiments of the present application, and may be implemented in accordance with the content of the specification in order to make the technical means of the embodiments of the present application more clearly understood, and in order to make the above and other objects, features and advantages of the embodiments of the present application more comprehensible, the following detailed description of the present application will be presented.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and that other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 schematically illustrates a structural view of a gas flow metering apparatus of the present application;

FIG. 2 schematically illustrates an exploded view of a gas flow metering apparatus of the present application;

FIG. 3 schematically illustrates an exploded view of another gas flow metering apparatus of the present application;

FIG. 4 is a cross-sectional view of the gas flow metering apparatus shown in FIG. 2 in one direction;

FIG. 5 is a cross-sectional view of the gas flow metering apparatus shown in FIG. 3 in one direction;

FIG. 6 is a partially exploded structural view of the gas flow metering apparatus shown in FIG. 3;

FIG. 7 is a cross-sectional view of the gas flow metering apparatus shown in FIG. 3 in another direction;

FIG. 8 is an enlarged view of a portion of the structure at A in FIG. 7;

fig. 9 is a structural view of an assembly formed by a side cover and a PCB board of the present application;

FIG. 10 is a partially exploded structural view of the assembly formed by the filter unit, module valve assembly and housing of the present application;

FIG. 11 is a structural view of the assembly formed by the filter unit, the modular valve assembly and the housing of the present application;

fig. 12 schematically shows a structural view of a cover of the present application;

fig. 13 schematically shows a structural view of a housing of the present application;

FIG. 14 is an enlarged view of a portion of the structure at B in FIG. 13;

FIG. 15 schematically illustrates a structural view of a modular valve assembly of the present application;

fig. 16 schematically shows a structural view of a filter unit of the present application;

FIG. 17 is an exploded view of the filter unit shown in FIG. 16;

fig. 18 schematically shows a structural view of another filter unit of the present application;

fig. 19 is an exploded view of the filter unit shown in fig. 18.

The reference numerals are as follows:

the shell is 1 provided with an opening 11, a containing cavity 12, a first mounting limiting structure 13, a first clamping part 131, a second mounting limiting structure 14, a second clamping part 141, a supporting rib 15, a limiting supporting structure 16 and a conducting structure 17;

2, a cover body, a 21 airflow inlet channel, a 22 airflow outlet channel and a 23 limit structure body;

3 a module valve assembly, 31 an air inlet, 32 an air outlet, 33 a metering module, 34 a valve assembly;

the filter unit 4, the 41 baffle structure, the 411 overflow port, the 412 limit mounting groove, the 413 limit groove, the 414 groove, the 415 compacting component, the 416 baffle part, the 42 filter screen structure, the 421 mounting part and the 43 limit baffle body;

5, a buffer accommodating cavity;

61 a seal body, 62 a seal;

7 side covers, 71 annular ribs;

81PCB board, 82 ground spring.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some of the embodiments of the present application, but not all of the embodiments. All other embodiments, based on the embodiments herein, which would be apparent to one of ordinary skill in the art without undue burden are within the scope of the present application.

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 application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "attached" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

The term "and/or" in this application is merely an association relation describing an associated object, and indicates that three relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In this application, the character "/" generally indicates that the associated object is an or relationship.

In the embodiments of the present application, the same reference numerals denote the same components, and in the sake of brevity, detailed description of the same components is omitted in different embodiments. It should be understood that the thickness, length, width, etc. dimensions of the various components in the embodiments of the present application, as well as the overall thickness, length, width, etc. dimensions of the integrated device, are illustrative only and should not be construed as limiting the present application in any way.

The term "plurality" as used herein refers to more than two (including two).

The application discloses a gas flow metering device, particularly as shown in fig. 1 to 19, comprising a shell 1, a cover body 2 and a module valve assembly 3; the shell is provided with an opening 11; the cover body 2 is covered on the opening 11 and forms a containing cavity 12, and the cover body 2 is provided with an airflow inlet channel 21 and an airflow outlet channel 22; the module valve assembly 3 is provided with an air flow inlet 31 and an air flow outlet 32, the module valve assembly 3 is arranged in the accommodating cavity 12, the air flow inlet 31 is communicated with the air flow inlet channel 21, the air flow outlet 32 is communicated with the air flow outlet channel 22, and the module valve assembly 3 is provided with a first installation orientation and a second installation orientation; a first installation limiting structure 13 and a second installation limiting structure 14 are arranged in the shell 1; when the module valve assembly 3 is in the first mounting orientation, the module valve assembly 3 is secured via the first mounting spacing structure 13; when the module valve assembly 3 is in the second mounting orientation, the module valve assembly 3 is secured via the second mounting spacing structure 14.

It should be noted that the shape and size of the housing 1 in the present application are not particularly limited, and may be any structural form that can satisfy the requirements. In a specific implementation, the casing 1 is preferably provided in a square shape (including a cuboid shape, a square shape, etc. as shown in fig. 1) as a whole; also, the material of the housing 1 is not particularly limited, and may be any material capable of satisfying the strength requirement. In particular, it is preferable to make the housing 1 of a metal material, specifically, for example, of an aluminum material, an aluminum alloy material, an iron material, or the like.

It should be noted that the fluid component metered by the gas flow metering device in the present application is not particularly limited, and may be used to meter one or more gases selected from the group consisting of fuel gas, hydrogen gas, oxygen gas, nitrogen gas, carbon dioxide gas, etc., and the metered gas is not limited to the listed gas types.

It should be noted that the structure of the module valve assembly 3 in the present application is not limited, and it may be any valve assembly that can be used to measure the flow of gas; in particular, the module valve assembly 3 may further optionally include a metering module 33 and a valve assembly 34, with the air flow inlet 31 being disposed on one of the metering module 33 and the valve assembly 34 and the air flow outlet 32 being disposed on the other. It should be noted that the type of the flow module is not particularly limited, and may be a diaphragm type flow module, an ultrasonic flow module, or the like. Also, the structure of the valve assembly is not particularly limited, and it may be any valve capable of opening and closing a flow path, and in practice, it is preferable to provide the valve as an electrically controlled valve. In further embodiments, as shown in fig. 4, 5 and 15, the air inlet 31 is provided on the metering module 33 and the air outlet 32 is provided on the valve assembly 34.

It should be noted that, in the present application, the first mounting position and the second mounting position are two different mounting options of the module valve assembly 3; in particular implementations, the modular valve assembly 3 may be selectively mounted in a first mounting orientation (e.g., as shown in fig. 2 and 4) or in a second mounting orientation (e.g., as shown in fig. 3 and 5), and may be selected based on actual use considerations. By selecting the mounting orientation, the purpose of adjusting the position of the gas flow inlet channel 21 and the gas flow outlet channel 22 can be achieved to meet the field mounting needs of the gas flow metering device.

It should be noted that, in the present application, the structural forms of the first installation limiting structure 13 and the second installation limiting structure 14 are not particularly limited, and may be any structural form capable of fixing the module valve assembly 3; which can be structurally matched according to the structure of the connection with the module valve assembly 3. In the specific implementation, the first installation limiting structure 13 and the second installation limiting structure 14 may be configured to be the same structure, or may be configured to be different structures, but are preferably configured to be the same structure (as shown in fig. 13 in particular).

This application is through making module valve subassembly 3 have first installation position and second installation position, and then makes gas flow metering device select the installation mode according to actual need, makes gas flow metering device only need a casing alright make fluid flow metering device satisfy different installation needs, and this kind of design promotes the commonality of product subassembly effectively, reduces the stock pressure of material to the very big degree to reduce the management degree of difficulty of material.

As some preferred embodiments of the present application, as shown in fig. 1 to 6, the cover 2 is further optionally made of a bilateral symmetry structure, and the airflow inlet channel 21 and the airflow outlet channel 22 are symmetrical with respect to the symmetry plane of the cover 2; and the first installation limiting structure 13 and the second installation limiting structure 14 are symmetrical relative to the symmetry plane. The symmetry plane is a reference plane (not shown) located between the air flow inlet passage 21 and the air flow outlet passage 22.

The cover body 2 is of a bilateral symmetry structure, the gas inlet channel and the air flow outlet channel 22 are symmetrical relative to the symmetry plane of the cover body 2, the first installation limiting structure 13 and the second installation limiting structure 14 are symmetrical relative to the symmetry plane, the cover body 2 and the shell 1 meet the requirement of generality, and the positions of the air flow inlet channel 21 and the air flow outlet channel 22 can be adjusted by using one cover body and one shell body of the fluid flow metering device; to meet the installation and adjustment requirements of the fluid flow metering device. Taking a gas meter as an example, a left meter (shown in fig. 2 and 4) or a right meter (shown in fig. 3 and 5) can be assembled by a set of components; the variety of materials is greatly reduced, and then the stock pressure and the material management pressure of the materials are reduced; meanwhile, the material can be purchased in batches, so that the material purchasing cost and the product production cost are reduced.

As some preferred embodiments of the present application, the first and second mounting limit structures 13 and 14 are further selectively provided on the bottom wall of the housing 1 (as shown in fig. 13 and 14). As an alternative embodiment, the first mounting limit structure 13 and the second mounting limit structure 14 may also be selectively provided on the inner side wall of the housing 1 (not shown in the drawings). In a specific implementation, as shown in fig. 13 and 14, the first installation limiting structure 13 includes a first clamping portion 131, and when the module valve assembly 3 is in the first installation orientation, the module valve assembly 3 is in clamping connection with the first clamping portion 131 (as shown in fig. 4); meanwhile, the second installation limiting structure 14 includes a second clamping portion 141, and when the module valve assembly 3 is in the second installation orientation, the module valve assembly 3 is in clamping connection with the second clamping portion 141 (as shown in fig. 5).

As a preferred embodiment, as shown in fig. 13 and 14, the first installation limiting structure 13 and the second installation limiting structure 14 are both arranged on the bottom wall of the casing 1, the first installation limiting structure 13 comprises ribs which are arranged on the bottom wall in a crossing manner, four first clamping parts 131 are formed on the ribs, and the module valve assembly 3 can be clamped and connected by the four first clamping parts 131 to be fixed in the accommodating cavity 12; similarly, the second installation limiting structure 14 also includes ribs disposed on the bottom wall in a crossing manner, and four second clamping portions 141 are formed on the ribs, so that the module valve assembly 3 can be clamped and connected by the four second clamping portions 141 to be fixed in the accommodating cavity 12.

Of course, the first installation limiting structure 13 and the second installation limiting structure 14 are not limited to the structural forms shown in the drawings, for example, the first installation limiting structure 13 and the second installation limiting structure 14 can be selectively set to annular arranged limiting ribs arranged on the bottom wall, and the annular arranged limiting ribs are further matched with the installation parts of the module valve assembly 3, and in particular, the installation parts of the module valve assembly 3 can be connected with the annular arranged limiting ribs in a plugging manner.

As an alternative embodiment, the first installation limiting structure 13 and the second installation limiting structure 14 can be selectively set to be arranged in a clamping groove in the shell 1, a buckle matched with the clamping groove is arranged on the module valve assembly 3, and the module valve assembly 3 is fixed in the accommodating cavity 12 through the clamping groove and the buckle; the first installation limiting structure 13 and the second installation limiting structure 14 can be set to be arranged in the shell 1 in a buckling mode, a clamping groove matched with the buckling mode is formed in the module valve assembly 3, and the module valve assembly 3 is fixed in the accommodating cavity 12 through the clamping groove and the buckling mode.

As an alternative embodiment, it is also possible to selectively provide one of the first mounting limit structure 13 and the second mounting limit structure 14 on the bottom wall, and the other one of them on the inner side wall of the housing 1. It should be noted that this arrangement is required to meet the requirement that the modular valve assembly 3 mounted in the first mounting orientation and the modular valve assembly 3 mounted in the second orientation be symmetrical with respect to the plane of symmetry of the cover 2.

The first clamping part 131 is arranged on the first installation limiting structure 13, and the second installation limiting structure 14 is arranged on the second clamping part 141; so that the module valve assembly 3 can be fixed in the accommodating cavity 12 through the first clamping part 131 and the second clamping part 141; the arrangement mode does not need redundant connecting pieces for connection, and has simple structure; the assembly process of the fluid flow metering device can be effectively simplified, and the assembly efficiency is improved.

As some preferred embodiments of the present application, a limiting support structure 16 is further optionally provided at the bottom wall between the first mounting limiting structure 13 and the second mounting limiting structure 14, and the module valve assembly 3 abuts against the limiting support structure 16. It should be noted that the structure of the limit support structure 16 in the present application is not particularly limited, as long as it can play a role of limit support for the module valve assembly 3 according to the installation requirement, so that the module valve assembly is fixed at a set position in the accommodating cavity 12. In the specific implementation, as shown in fig. 4 and 5, the limit supporting structure 16 is preferably provided as a supporting rib arranged at the center of the bottom in the shell 1, and the arrangement is simple in structure and convenient to produce; in the actual production process, the shell body 1 is only required to be integrally formed.

According to the die set valve assembly 3, the limiting support structure 16 is arranged, and under the action of the limiting support structure 16, the die set valve assembly 3 can be supported in an auxiliary limiting mode, so that the die set valve assembly 3 is fixed in the shell 1 more firmly; the module valve assembly 3 is prevented from shifting in the shell 1 during the transportation process of the product, and the reliability of the product is further improved.

As some preferred embodiments of the present application, as shown in fig. 2 to 5, 10 and 11, the gas flow metering apparatus further optionally further includes a filter unit 4, the filter unit 4 being disposed within the accommodating chamber 12 and being disposed between the gas flow inlet channel 21 and the gas flow inlet 31, the gas flow inlet channel 21 delivering a gas flow through the filter unit 4 to the gas flow inlet 31.

It should be noted that the filtering unit is not particularly limited, and may be any filtering unit capable of meeting the airflow filtering requirement.

As some preferred embodiments of the present application, as shown in fig. 16 and 17, the filtering unit 4 includes a filtering structure 42 and a flow blocking structure 41, the flow blocking structure 41 is provided with a through flow port 411 in a thickness direction, the filtering structure 42 is disposed on one side of the flow blocking structure 41, and the filtering structure 42 is plugged in the flow port 411. It should be noted that, the specific form of the flow blocking structure 41 is not limited, and may be selectively set in connection with a specific application scenario.

As some preferred embodiments of the present application, the flow blocking structure 41 is further optionally formed in a plate shape as a whole, and as shown in fig. 17, a flow blocking portion 416 is disposed adjacent to the flow through opening 411, where the flow blocking portion 416 is used to face the gas flow inlet channel of the gas flow metering device, so as to change the flow direction of the gas entering from the gas flow inlet channel.

In the embodiment, as shown in fig. 4 and 5, the flow blocking portion 416 is disposed at the adjacent position of the through-flow port 411, so that the flow blocking portion is opposite to the air flow inlet channel 21 of the air flow metering device, and the flow direction of the air entering the air flow inlet channel 21 can be changed, so that the purpose of buffering the air flow is achieved, and the impact of the air flow on downstream components (such as metering modules and the like) can be effectively avoided. In addition, the filter screen structure 42 can be supported by the flow blocking part, so that the service life of the filter screen structure 42 is prolonged.

As a preferred embodiment of the present application, the screen structure 42 is further optionally detachably connected to the flow blocking structure 41. In the specific implementation, as shown in fig. 16 and 17, the flow blocking structure 41 is made to be plate-shaped as a whole, and a limit mounting groove 412 is arranged on the flow blocking structure 41 outside the flow passage 411, and the limit mounting groove 412 extends from the first end to the second end of the flow blocking structure 41; the filter screen structure 42 is provided with a mounting portion 421 which is matched with the limit mounting groove 412, and the filter screen structure 42 is connected with the flow blocking structure 41 through the mounting portion 421 and the limit mounting groove 412. During the installation process, the filter screen structure 42 can be connected with the limit installation groove 412 in a plugging manner; facilitating assembly and replacement of the screen structure 42.

As a preferred embodiment of the present application, as shown in fig. 17, the second end of the flow blocking structure 41 may be further optionally provided with a limiting groove 413 adapted to the filter screen structure 42, where a notch of the limiting groove 413 faces the first end; the insertion end of the filter screen structure 42 extends into the limiting groove 413. This application can play the restriction effect effectively to filter screen structure 42 through setting up spacing groove 413, simultaneously, can also improve the sealing performance between filter screen structure 42's the insertion end and the fender stream structure 41 effectively, makes fender stream structure 41 play better water conservancy diversion effect.

In order to fix the filter screen structure 42 more firmly and facilitate disassembly and assembly, as shown in fig. 16 and 17, the flow blocking structure 41 further includes a limiting blocking body 43 adapted to be connected with the first end for blocking the filter screen structure 42; the limiting stopper 43 is detachably connected to the first end. In a specific implementation, the limiting blocking body 43 may be further optionally provided with a clamping groove, and the clamping groove is in clamping connection with the first end. As an alternative embodiment, one of the limiting baffle 43 and the baffle plate is provided with a clamping groove, the other one of the limiting baffle 43 and the baffle plate is provided with a buckle matched with the clamping groove, and the limiting baffle 43 is fixed at the first end through the clamping groove and the buckle; alternatively, the flow blocking structure 41 may further include a connector, and the limiting stopper 43 is fixed to the first end through the connector.

As an alternative embodiment of the present application, as shown in fig. 18 and 19, the flow blocking structure 41 included in the filtering unit 4 may be optionally formed in a plate shape, the flow blocking structure 41 forms a groove 414 in the thickness direction thereof, the flow passing port 411 is located at the bottom of the groove 414, and the filter screen structure 42 is adapted to be connected with the groove 414; the filter unit 4 further comprises a hold-down member 415, through which hold-down member 415 the filter screen structure 42 is pressed into the recess 414 during installation.

As some preferred embodiments of the present application, as shown in fig. 19, the bottom of the groove 414 on one side of the through-flow port 411 may further optionally include a flow blocking portion 416, where the flow blocking portion 416 is configured to face the gas flow inlet channel 21 of the gas flow metering device, so as to change the flow direction of the gas entering from the gas flow inlet channel 21.

In the embodiment, the bottom of the groove 414 at one side of the through-flow port 411 includes the flow blocking portion 416, and in the embodiment, as shown in fig. 4 and 5, the flow blocking portion 416 is opposite to the air flow inlet channel 21 of the air flow metering device, so as to change the flow direction of the air entering the air flow inlet channel 21, achieve the purpose of buffering the air flow, and avoid the impact of the air flow on downstream components (such as the metering module, etc.); in addition, the present application can also support the filter screen structure 42 by providing the flow blocking portion 416, so as to prolong the service life of the filter screen structure 42. It should be noted that the structural form of the filter structure 42 is not particularly limited, and may be any filter that meets the airflow filtering requirement. In practice, the screen structure 42 is preferably configured as a corrugated screen structure (as shown in fig. 16-19) that increases the filtering area and reduces the pressure loss. Experiments prove that when the filtering precision of the filter screen structure 42 is set to be 20-150 micrometers, the filter screen structure has a good filtering effect, and the service life of the module valve assembly 3 can be effectively prolonged. In particular implementations, the filter screen structure 42 may be selectively set to a filtration accuracy of 20 microns, 30 microns, 40 microns, 50 microns, 60 microns, 70 microns, 80 microns, 90 microns, 100 microns, 110 microns, 120 microns, 130 microns, 140 microns, or 150 microns; it should be noted that the filtering accuracy of the screen structure 42 is not limited to the values listed above, but may be any value between 20-150 microns.

This application is through setting up filter unit, can get into air inlet 31 after filtering the air current that air current admission passage 21 got into, and then make module valve subassembly 3 obtain effective protection, avoid the foreign matter in the gas to the measurement precision of module valve subassembly 3, the normal work of valve to cause the influence, and then promote the life of module valve subassembly 3.

As some preferred embodiments of the present application, as shown in fig. 15, the module valve assembly 3 is further optionally comprised of a metering module 33 and a valve assembly 34; the inside wall of the housing 1 is provided with a filter unit mounting position between the opening 11 and the metering module 33, and the filter unit 4 is fixed at the filter unit mounting position.

In the specific implementation, the structural form of the installation position of the filtering unit is not particularly limited, and the filtering unit can be selectively set as a supporting structure annularly arranged on the inner wall of the shell 1; of course, in practical implementation, the filter unit mounting position should meet the filter unit position adjustment requirement of the module valve assembly 3 in different mounting orientations.

According to the filter unit installation position is arranged on the inner side wall of the shell 1, the filter unit 4 is fixed in the shell 1 through the filter unit installation position, and the filter unit 4 is connected with the inner side wall of the shell 1 in an adaptive manner, so that the installation process of the filter unit 4 is simplified.

As some preferred embodiments of the present application, the inner side wall of the housing 1 is further optionally provided with a plurality of support ribs 15 extending towards the opening 11, the extending ends of the plurality of support ribs 15 forming a filter unit mounting location.

It should be noted that the number of the support ribs 15 is not particularly limited, and may be selectively set according to actual needs; as shown in fig. 10 and 13 in particular, four support ribs 15 are respectively arranged on opposite sides of the inner side wall of the housing 1, and a plurality of support ribs 15 extend to the same face in the direction of the opening 11 for the limit mounting of the filter unit 4.

The filter unit installation position is formed by a plurality of supporting ribs 15 arranged on the inner side wall of the shell 1, and the filter unit 4 can be positioned and installed under the action of the supporting ribs 15; and, the mechanical properties of casing 1 can also be improved to the brace, specifically can promote the overall stability and the local stability of casing 1, and under the condition that satisfies the mechanical requirement, casing 1 can be made lighter and thinner, and then reduces casing 1's material cost. In order to adjust the installation position of the filter unit 4 according to the installation requirement of the fluid flow metering device, a plurality of supporting ribs may be arranged on the inner side wall of the housing 1 (specifically, the arrangement mode may refer to fig. 13), so that the installation position of the filter unit 4 may be adjusted according to the first installation position and the second installation position of the module valve assembly 3, and further, the filter unit 4 may filter the fluid entering from the fluid inlet channel. In particular embodiments, the support ribs 15 may be integrally formed with the housing.

As some preferred embodiments of the present application, as shown in fig. 4 and 5, the filter unit 4 is further optionally provided in a plate shape, and a buffer chamber 5 is formed between the cover 2 and the filter unit 4. It should be noted that the plate-shaped arrangement of the filter unit 4 includes making the filter unit have a flat plate structure, a curved plate structure, a bent plate structure, and the like; of course, the structural form of the filter unit is not limited to the above-listed structural form.

This application is through making filter unit be platy setting, can make filter unit can be when satisfying the filtration requirement, is convenient for realize filter unit's installation and change. In addition, the buffer containing cavity 5 is formed between the cover body 2 and the filtering unit 4, so that foreign matters in the air flow can be collected and stored, and subsequent centralized treatment is facilitated; furthermore, through forming buffering appearance chamber 5, can also store a large amount of foreign matters, and then extension clearance and maintenance cycle reduce fluid flow metering device's maintenance cost.

As some preferred embodiments of the present application, as shown in fig. 12, a limit structure 23 is further optionally provided on the side of the cover 2 facing the housing 1, and during the installation process, the filter unit 4 is pressed against the filter unit installation position via the limit structure 23.

It should be noted that the form of the limiting structure is not particularly limited, and may be any structure capable of applying a pressing force to the filtering unit; as shown in fig. 12, the stopper structure 23 is provided as a reinforcing rib disposed on the cover 2.

The limiting structure 23 is arranged on the cover body 2, and the limiting structure 23 can press the filter unit on the filter unit installation position in the process of connecting the cover body 2 with the shell 1; the filter unit can be more firmly fixed at a set position in the shell 1; meanwhile, the filter unit 4 is fixed without additionally arranging a connecting piece, so that the installation process of the fluid flow measuring unit is simplified, the installation difficulty and the installation cost of the fluid flow measuring unit are reduced, and the installation efficiency is effectively improved.

As some preferred embodiments of the present application, as shown in fig. 2 to 5 and 7, the gas flow rate measuring device further optionally further includes a sealing body 61, where a sealing body mounting position is provided on the outer periphery of the opening 11, and the sealing body 61 is pressed against the sealing body mounting position via the cover 2 to form an annular sealing area between the cover 2 and the housing 1.

In particular, as shown in fig. 2 and 3, a mounting flange is formed on the outer periphery of the opening 11 of the housing 1, the cover 2 and the housing 1 are connected via a connector, and the sealing body 61 is deformed by pressing during the pretensioning of the connector, and a sealing region is formed on the outer periphery of the opening 11.

The sealing body 61 is arranged to realize sealing connection between the cover body 2 and the shell 1, and an annular sealing area is formed at the periphery of the opening 11; the problem of air leakage of the fluid flow metering device is avoided.

As some preferred embodiments of the present application, as shown in fig. 2, 3 and 6, the fluid flow metering device may further optionally further comprise an electrical component and a side cover 7; the side cover 7 is covered on the outer side wall of the shell 1 and forms an electric component accommodating cavity, and the electric component is fixedly arranged in the electric component accommodating cavity.

In particular, the outer side wall of the housing 1 adjacent to the opening 11 is further optionally provided with an electrical component mounting position, and the electrical component is fixedly mounted on the electrical component mounting position. As an alternative embodiment, the side cover 7 may be further optionally provided with an electrical component mounting position, where an electrical component is fixed (as shown in fig. 9); in a specific installation process, the electrical component is first installed on the side cover 7, and then the side cover is fixed on the outer side wall of the housing 1.

In the specific implementation, as shown in fig. 6, the outer side wall of the casing 1 adjacent to the opening 11 may be further optionally provided with an annular protrusion, and the side cover 7 and the annular protrusion are covered and combined to form an electrical component accommodating cavity. As an alternative embodiment, the outer side wall of the housing 1 adjacent to the opening 11 may be formed with a cavity recessed toward the accommodating cavity 12, and the side cover 7 and the cavity cover to form an electrical component accommodating cavity (not shown in the figure). In particular, the side cover 7 can optionally have a recess facing away from the receiving space 12, the side cover 7 being arranged on the outer side wall of the housing 1 and forming an electrical component receiving space (not shown).

In order to form a sealed accommodation cavity between the side cover 7 and the outer side wall of the housing 1, as shown in fig. 2, 3 and 6, the gas flow metering device further comprises a sealing member 62; the side cover 7 is sealingly connected to the outer side wall of the housing 1 via the seal 62, and forms a seal at the outer periphery of the electrical component accommodation chamber. In particular, as shown in fig. 7, the outer side wall of the housing 1 is further optionally provided with a seal mounting groove in a ring shape, the side cover 7 is provided with an annular rib 71 aligned with the seal mounting groove, and the seal 62 is pressed into the seal mounting groove via the annular rib. As an alternative embodiment, the joint of the side cover 7 may be optionally provided with a seal mounting groove, and the outer side wall of the housing 1 is provided with an annular rib (not shown) aligned with the seal mounting groove, and the seal is pressed into the seal mounting groove by the annular rib.

As some preferred embodiments of the present application, as shown in fig. 6 to 8, the electrical component further optionally includes a PCB 81, where a grounding spring 82 is disposed on the PCB 81; the casing 1 is made of conductive metal material, and the PCB 81 is electrically connected to the casing 1 through a grounding spring 82. In a specific implementation, the side wall of the housing 1 is further optionally provided with a conductive structure 17 aligned with the grounding spring 82, and the grounding spring 82 is electrically connected with the housing 1 through the conductive structure 17. The arrangement mode can realize the grounding connection of the PBC board in the installation process, and effectively improves the assembly efficiency of the product on the premise of ensuring safety protection. In particular, the conductive structure 17 may be further selectively configured as a conductive pillar; it is further optional to make the conductive structure 17 integrally formed with the housing 1.

As some preferred embodiments of the present application, one of the outer side wall of the housing 1 and the side cover 7 is further selectively provided with a clamping position, the other one of the two is provided with a clamping structure adapted to the clamping position, and the side cover 7 is connected with the side wall of the housing 1 in a clamping manner through the clamping structure and the clamping position. As an alternative embodiment, the gas flow metering device may further comprise a connecting member, wherein the side cover 7 is provided with a mounting hole, and the connecting member penetrates through the mounting hole to connect the housing 1 and the side cover 7.

The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims (10)

1. A gas flow metering device, comprising:

the shell is provided with an opening;

the cover body is covered on the opening and forms a containing cavity, and an air flow inlet channel and an air flow outlet channel are formed in the cover body;

a module valve assembly having an air inlet and an air outlet, the module valve assembly disposed within the receiving cavity, the air inlet in communication with the air inlet passage, the air outlet in communication with the air outlet passage, the module valve assembly having a first mounting orientation and a second mounting orientation;

A first installation limiting structure and a second installation limiting structure are arranged in the shell; when the module valve assembly is in the first installation position, the module valve assembly is fixed through the first installation limiting structure; when the module valve assembly is in the second installation orientation, the module valve assembly is fixed through the second installation limiting structure.

2. A gas flow metering apparatus as claimed in claim 1, wherein,

the cover body is of a bilateral symmetry structure, and the air flow inlet channel and the air flow outlet channel are symmetrical relative to the symmetry plane of the cover body; and the first installation limiting structure and the second installation limiting structure are symmetrical relative to the symmetry plane.

3. A gas flow metering apparatus as claimed in claim 2, wherein,

the first installation limiting structure and the second installation limiting structure are respectively arranged on the bottom wall of the shell, or the first installation limiting structure and the second installation limiting structure are respectively arranged on the inner side wall of the shell;

the first installation limiting structure comprises a first clamping part, and when the module valve assembly is in the first installation position, the module valve assembly is in clamping connection with the first clamping part;

The second installation limiting structure comprises a second clamping part, and when the module valve assembly is positioned in the second installation position, the module valve assembly is connected with the second clamping part in a clamping mode.

4. A gas flow metering apparatus according to claim 3, wherein,

the bottom wall between the first installation limit structure and the second installation limit structure is also provided with a limit support structure, and the module valve assembly is abutted to the limit support structure.

5. The gas flow metering device of claim 1, wherein the gas flow metering device further comprises:

and the filter unit is arranged in the accommodating cavity and is blocked between the airflow inlet channel and the airflow inlet, and the airflow inlet channel conveys airflow to the airflow inlet through the filter unit.

6. A gas flow metering apparatus according to claim 5, wherein,

the module valve assembly comprises a metering module and a valve assembly;

the filter unit installation position is arranged on the inner side wall of the shell, the filter unit installation position is positioned between the opening and the metering module, and the filter unit is fixed at the filter unit installation position.

7. A gas flow metering apparatus as recited in claim 6, wherein,

the inside wall of casing is equipped with a plurality of supporting ribs towards the opening extends, the extension end of a plurality of supporting ribs forms the filtration unit installation position.

8. A gas flow metering apparatus according to claim 5, wherein,

the filter unit is plate-shaped, and a buffer containing cavity is formed between the cover body and the filter unit.

9. A gas flow metering apparatus as recited in claim 6, wherein,

and a limiting structure is arranged on one side of the cover body, which is opposite to the shell, and the filter unit is pressed on the filter unit installation position through the limiting structure.

10. The gas flow metering device of any one of claims 1 to 9, wherein the gas flow metering device further comprises:

a sealing body;

the periphery of the opening is provided with a sealing body installation position, and the sealing body is pressed at the sealing body installation position through the cover body so as to form an annular sealing area between the cover body and the shell.

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