阅读说明：本技术 一种具有抗干扰功能的燃气表 (Gas meter with anti-interference function ) 是由 吴庆卫 吴高翔 于 2021-01-22 设计创作，主要内容包括：一种具有抗干扰功能的燃气表,涉及燃气检测装置技术领域,燃气表包括上壳体、下壳体以及超声波模块,下壳体内形成有腰形凹槽,超声波模块设于腰形凹槽中,上壳体与下壳体呈上下设置且可拆卸固定连接,下壳体中设有安装结构以及抗干扰结构,抗干扰结构包括两个弧形段以及四个平直段,弧形段的两侧分别可拆卸固定连接有平直段,平直段与下壳体可拆卸固定连接,且相邻设置的平直段之间抵接设置,安装结构包括对称设置于超声波模块相对两侧的弹性限位组件,弹性限位组件包括抵接板、伸缩导滑结构以及固定板,伸缩导滑结构设于抵接板、固定板之间且弹性连接,本发明中超声波可拆卸稳定安装在下壳体中,且抗干扰结构起到屏蔽作用,保证测量精度。(A gas meter with anti-interference function relates to the technical field of gas detection devices, and comprises an upper shell, a lower shell and an ultrasonic module, wherein a kidney-shaped groove is formed in the lower shell, the ultrasonic module is arranged in the kidney-shaped groove, the upper shell and the lower shell are arranged up and down and are detachably and fixedly connected, a mounting structure and an anti-interference structure are arranged in the lower shell, the anti-interference structure comprises two arc sections and four straight sections, two sides of the arc sections are respectively detachably and fixedly connected with straight sections, the straight sections are detachably and fixedly connected with the lower shell, and abutting connection is arranged between the adjacent straight sections, the mounting structure comprises elastic limiting components symmetrically arranged at two opposite sides of the ultrasonic module, each elastic limiting component comprises an abutting plate, a telescopic guide sliding structure and a fixed plate, the telescopic guide sliding structure is arranged between the abutting plates and is elastically connected, the ultrasonic wave is detachably and stably arranged in the lower shell, and the anti-interference structure plays a role in shielding, so that the measurement precision is ensured.)

1. A gas meter with anti-interference function comprises an upper shell (1), a lower shell (2) and an ultrasonic module (3), wherein a waist-shaped groove (4) is formed in the lower shell (2), the ultrasonic module (3) is arranged in the waist-shaped groove (4), the upper shell (1) and the lower shell (2) are arranged from top to bottom and are detachably and fixedly connected, the gas meter is characterized in that a mounting structure and an anti-interference structure (5) are arranged in the lower shell (2), the anti-interference structure (5) is integrally in a closed ring shape and is arranged in the waist-shaped groove (4) in an adaptive manner, the anti-interference structure (5) is attached to the inner wall of the lower shell (2), the anti-interference structure (5) comprises two arc sections (51) and four straight sections (52), the two sides of the arc sections (51) are respectively detachably and fixedly connected with the straight sections (52), the straight sections (52) are detachably and fixedly connected with the lower shell (2), and the adjacent straight sections (52) are abutted;

the arc-shaped section (51) and the straight section (52) are both of a double-layer structure and comprise a rubber layer (6) and a shielding layer (61);

mounting structure including the symmetry set up in the spacing subassembly of elasticity (7) of the relative both sides of ultrasonic wave module (3), spacing subassembly of elasticity (7) are including butt plate (71), flexible smooth structure (72) and fixed plate (73) of leading, flexible lead smooth structure (72) and locate between butt plate (71), fixed plate (73) and elastic connection, butt plate (71) be used for with ultrasonic wave module (3) butt, fixed plate (73) be used for with casing (2) butt down.

2. The gas meter with the anti-interference function according to claim 1, wherein the arc-shaped section (51) is provided with insertion projections (8) at two sides thereof, the straight section (52) is provided with insertion grooves (9) adapted to the insertion projections (8) at one side thereof, and the insertion projections (8) are inserted into the insertion grooves (9) in a limited manner.

3. The gas meter with the anti-interference function according to claim 2, wherein the plug-in projection (8) comprises a guiding smooth portion (81) and a limiting cylindrical portion (82) which are integrally arranged, the guiding smooth portion (81) is connected with the arc-shaped section (51), and the maximum width of the guiding smooth portion (81) is smaller than the outer diameter of the limiting cylindrical portion (82).

4. The gas meter with the anti-interference function according to claim 3, wherein the height of the plug-in projection (8) is consistent with the height of the arc-shaped section (51).

5. The gas meter with the anti-interference function according to claim 1, wherein a guide positioning block (10) is arranged on the bottom wall of the lower housing (2), a positioning groove (11) adapted to the guide positioning block (10) is formed in the straight section (52), and the guide positioning block (10) is inserted into the positioning groove (11).

6. The gas meter with the anti-interference function according to claim 5, wherein the width of the guide positioning block (10) is gradually reduced in a direction approaching the bottom wall of the lower housing (2).

7. The gas meter with the anti-interference function according to claim 1, wherein the telescopic sliding guide structure (72) comprises a plurality of springs (721) and telescopic rods (722), the springs (721) and the telescopic rods (722) are provided, and the telescopic directions of the springs (721) and the telescopic rods (722) are parallel to the width direction of the ultrasonic module (3).

8. The gas meter with the anti-interference function according to claim 1, wherein the shielding layer (61) is made of nickel cupronickel or cupronickel.

Technical Field

The invention relates to the technical field of gas detection devices, in particular to a gas meter with an anti-interference function.

Background

The gas meter in the prior art is basically a mechanical meter (mechanical diaphragm gas meter), the counting principle of the gas meter is that the flow of the gas drives a counting digit wheel to rotate for counting, and due to a mechanical rotating structure, the gas meter has the defects of large counting error range (inaccurate measurement especially in a low-flow area), large meter body volume (large occupied installation space), aging formed after a long service time, and the like, and reduces the metering precision. With the advance of technology, a new generation of ultrasonic gas meters (gas volume meters) has appeared, and the reliability and precision of the mounting structure of the ultrasonic module are low, for example, some mounting methods are fixed welding methods, detailed, two fixing plates which are arranged vertically and oppositely are welded on two opposite sides of the ultrasonic module, the fixing plates are welded with the inner wall of the gas meter, because the area of the connecting position of the fixing plate and the ultrasonic module is small, the structural stability is poor, the stress is concentrated, when the gas meter is collided by external force, the joint of the fixing plate and the ultrasonic module is easy to be damaged, so that the ultrasonic module is inclined, the gas meter is easy to generate deviation when gas flow is detected, in addition, the shell structure of the gas meter is simple, and the ultrasonic module is easy to be interfered by an external magnetic field to influence the measurement precision, so that the gas meter has a part to be improved.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a gas meter with an anti-interference function, wherein ultrasonic waves are detachably and stably arranged in a lower shell, and an anti-interference structure plays a role in shielding to ensure the measurement precision, and the specific scheme is as follows:

a gas meter with an anti-interference function comprises an upper shell, a lower shell and an ultrasonic module, wherein a kidney-shaped groove is formed in the lower shell, the ultrasonic module is arranged in the kidney-shaped groove, the upper shell and the lower shell are arranged up and down and are detachably and fixedly connected, an installation structure and an anti-interference structure are arranged in the lower shell, the anti-interference structure is integrally in a closed ring shape and is installed in the kidney-shaped groove in an adaptive mode, the anti-interference structure is attached to the inner wall of the lower shell and comprises two arc-shaped sections and four straight sections, the straight sections are detachably and fixedly connected to two sides of each arc-shaped section respectively, the straight sections are detachably and fixedly connected with the lower shell, and the adjacent straight sections are abutted;

the arc-shaped section and the straight section are both of double-layer structures and comprise rubber layers and shielding layers;

the mounting structure including the symmetry set up in the spacing subassembly of elasticity of the relative both sides of ultrasonic wave module, the spacing subassembly of elasticity includes butt plate, flexible smooth structure and fixed plate of leading, flexible lead smooth structure and locate just elastic connection between butt plate, the fixed plate, the butt plate be used for with ultrasonic wave module butt, the fixed plate be used for with casing butt down.

Furthermore, the two sides of the arc-shaped section are provided with inserting convex blocks, one side of the straight section is provided with inserting grooves matched with the inserting convex blocks, and the inserting convex blocks are in limited insertion in the inserting grooves.

Furthermore, the insertion lug comprises a guide smooth part and a limiting cylindrical part which are integrally arranged, the guide smooth part is connected with the arc-shaped section, and the maximum width of the guide smooth part is smaller than the outer diameter of the limiting cylindrical part.

Furthermore, the height of the inserting convex block is consistent with that of the arc-shaped section.

Furthermore, a guide positioning block is arranged on the bottom wall of the lower shell, a positioning groove matched with the guide positioning block is formed in the straight section, and the guide positioning block is inserted into the positioning groove.

Further, the width of the guide positioning block is gradually reduced along the direction close to the bottom wall of the lower shell.

Furthermore, flexible smooth structure of leading includes spring, telescopic link, spring and telescopic link all are provided with a plurality ofly, the flexible direction of spring, telescopic link with the width direction parallel arrangement of ultrasonic module.

Further, the shielding layer is made of nickel cupronickel or cupronickel.

Compared with the prior art, the invention has the following beneficial effects:

when the ultrasonic module is assembled, the arc section and the straight section are assembled together to form a closed annular anti-interference structure, the closed annular anti-interference structure is installed in the kidney-shaped groove, the closed annular anti-interference structure can play a role of shielding a magnetic field on the ultrasonic module in the lower shell, the influence on the measurement precision is reduced, one elastic limiting component is firstly placed in the kidney-shaped groove, a fixing plate is contacted with the inner wall of the lower shell, the ultrasonic module is placed in the lower shell, the abutting plate is abutted against the surface of the ultrasonic module, then, the other elastic limiting component which is compressed in advance is placed on the other side of the ultrasonic module, the abutting plate and the fixing plate are respectively abutted against the inner wall of the lower shell and the surface of the ultrasonic module, so that the ultrasonic module is detachably and fixedly installed in the lower shell, the two elastic limiting components jointly complete the fixation of the ultrasonic module, in conclusion, the ultrasonic wave is detachably installed in the, the position is stable, and the possibility of deflection of the ultrasonic module is greatly reduced.

Drawings

FIG. 1 is an overall schematic diagram of an embodiment of the present invention;

FIG. 2 is a top view of the lower housing showing a specific structure of the elastic limiting assembly of the present invention;

FIG. 3 is a top view of the lower housing showing the position of the guide positioning block of the present invention;

FIG. 4 is a schematic structural view showing the positions of the insertion grooves in the straight sections;

fig. 5 is a schematic structural view showing a buffering support structure according to the present invention.

Reference numerals: 1. an upper housing; 2. a lower housing; 3. an ultrasonic module; 4. a kidney-shaped groove; 5. an anti-interference structure; 51. an arc-shaped section; 52. a straight section; 6. a rubber layer; 61. a shielding layer; 7. an elastic limit component; 71. a butt joint plate; 72. a telescopic sliding guide structure; 721. a spring; 722. a telescopic rod; 73. a fixing plate; 8. inserting the projection; 81. a guide smoothing section; 82. a limiting cylindrical part; 9. inserting grooves; 10. guiding a positioning block; 11. a positioning groove; 12. a cushioning support structure; 121. a substrate; 122. a support bar; 123. a buffer layer.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.

With reference to fig. 1 to 5, a gas meter with anti-interference function, the gas meter includes upper housing 1, lower housing 2, ultrasonic module 3, for make ultrasonic module 3 can dismantle firm assembly, be equipped with mounting structure in lower housing 2, ultrasonic module 3 passes through mounting structure and installs in lower housing 2. In order to ensure the normal work of the ultrasonic module 3, an anti-interference structure 5 is arranged in the lower shell 2, and the ultrasonic module 3 is protected against magnetic field interference.

Detailed description, it is the thin-walled structure that the cross-section is waist shape to go up casing 1 and casing 2 down, it is formed with waist shape recess 4 to make on the casing 2 down, waist shape recess 4 is used for placing ultrasonic module 3 and mounting structure, it sets up about going up casing 1 and casing 2 are down, thereby form seal structure through screw fixed connection, thereby play the guard action to inside ultrasonic module 3 and ultrasonic module 3 mounting structure, and the upper end both sides of going up casing 1 are integrative air inlet and the gas outlet respectively, be convenient for use with the cooperation of inside ultrasonic module 3.

As shown in fig. 2, anti-jamming structure 5 is wholly sealed annular and the adaptation is installed in waist shape recess 4, anti-jamming structure 5 sets up with the inner wall laminating of casing 2 down, anti-jamming structure 5 includes two segmental arcs 51 and four straight sections 52, fixedly connected with straight section 52 can be dismantled respectively to segmental arc's 51 both sides, fixed connection can be dismantled with casing 2 down to straight section 52, and the butt setting between the straight section 52 of adjacent setting, straight section 52 is under casing 2's limiting displacement down, the rigidity, segmental arc 51 is under straight section 52's limiting displacement, the rigidity, thereby splice into and be sealed annular anti-jamming structure 5. In this embodiment, arc section 51 and straight section 52 are bilayer structure, including rubber layer 6 and shielding layer 61, and shielding layer 61 is made by nickel cupronickel or foreign cupronickel, and rubber layer 6 is made by rubber, is close to ultrasonic module 3 and sets up, and the thickness on rubber layer 6 is less than shielding layer 61's thickness, guarantees anti-jamming effect.

Specifically, the two sides of the arc section 51 are integrally connected with the inserting convex blocks 8, the height of the inserting convex blocks 8 is consistent with that of the arc section 51, the material of the plugging convex block 8 is consistent with that of the shielding layer 61, one side of the straight section 52 is provided with a plugging groove 9 matched with the plugging convex block 8, the plugging convex block 8 comprises a guide smooth part 81 and a limit cylindrical part 82 which are integrally arranged, the guide smooth part 81 is a long-strip cuboid, the limiting cylindrical part 82 is an elongated cylinder, the maximum width of the guiding smooth part 81 is smaller than the outer diameter of the limiting cylindrical part 82, and when the limiting cylindrical part is installed, the plugging recess 9 of the straight section 52 is aligned in the vertical direction with the plugging projection 8 of the arc-shaped section 51, when the inserting convex block 8 is limited and inserted into the inserting groove 9, the guiding smooth part 81 plays a guiding role, and the limiting cylindrical part 82 plays a limiting role in the horizontal direction, so that the arc-shaped section 51 is prevented from toppling over.

With reference to fig. 3 and 4, the bottom wall of the lower casing 2 is provided with the guide positioning block 10, specifically, the guide positioning block 10 is integrally in an isosceles trapezoid shape, the width of the guide positioning block 10 is gradually reduced along the direction close to the bottom wall of the lower casing 2, the straight section 52 is provided with a positioning groove 11 adapted to the guide positioning block 10, the guide positioning block 10 is inserted into the positioning groove 11, and the guide positioning block 10 plays a limiting role in the straight section 52.

As shown in fig. 2, the mounting structure includes elastic limiting components 7 symmetrically disposed on two opposite sides of the ultrasonic module 3, the elastic limiting components 7 include a contact plate 71, a telescopic sliding guide structure 72 and a fixing plate 73, the telescopic sliding guide structure 72 is disposed between the contact plate 71 and the fixing plate 73, the telescopic sliding guide structure 72 includes a spring 721 and a telescopic rod 722, the spring 721 and the telescopic rod 722 are disposed in plural, the extension direction of the spring 721 and the telescopic rod 722 is parallel to the width direction of the ultrasonic module 3, two ends of the spring 721 are respectively fixedly connected with the contact plate 71 and the fixing plate 73, the fixed end and the free end of the telescopic rod 722 are respectively fixedly connected with the contact plate 71 and the fixing plate 73, when the spring 721 is compressed, under the guiding action of the telescopic rod 722, the abutting plate 71 and the fixing plate 73 are close to each other, and the length of the whole elastic limiting assembly 7 along the telescopic direction of the spring 721 is adjusted.

When assembling ultrasonic module 3, put an elasticity spacing subassembly 7 earlier in waist shape recess 4 for fixed plate 73 contacts with the inner wall of lower casing 2, place ultrasonic module 3 in lower casing 2 again, butt plate 71 and ultrasonic module 3's surface butt, later, place another elasticity spacing subassembly 7 that is compressed in advance on one side in addition of ultrasonic module 3, make butt plate 71, fixed plate 73 respectively with the inner wall of lower casing 2, ultrasonic module 3's surface butt, thereby make ultrasonic module 3 demountable fixation install in lower casing 2.

As shown in fig. 5, preferably, a buffering support structure 12 is further disposed in the lower housing 2, and the buffering support structure 12 is disposed at the bottom of the kidney-shaped groove 4, avoiding the positions of the guiding and positioning block 10 and the anti-jamming structure 5. The buffering support structure 12 includes a base plate 121, a plurality of support rods 122 and a rubber layer 123, the base plate 121 is disposed on the lower casing 2, and two ends of the support rods 122 are respectively fixedly connected to the rubber layer 123 and the base plate 121. The rubber layer 123 is made of sponge or rubber, and in the installation process, if the ultrasonic module 3 is dropped due to losing hands, the rubber layer 123 plays a role in reducing impact force.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.