CN108760193A - Rocking bar location structure, gas meter movement device for detecting sealability and method - Google Patents
Rocking bar location structure, gas meter movement device for detecting sealability and method Download PDFInfo
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- CN108760193A CN108760193A CN201811033085.8A CN201811033085A CN108760193A CN 108760193 A CN108760193 A CN 108760193A CN 201811033085 A CN201811033085 A CN 201811033085A CN 108760193 A CN108760193 A CN 108760193A
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- gas meter
- rocking bar
- meter movement
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- exhaust tube
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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Abstract
The present invention relates to gas meter movement detection fields, it is intended to solve the problems, such as gas meter movement sealing propertytest time long inefficiency in the prior art, provide rocking bar location structure, gas meter movement device for detecting sealability and method.Rocking bar location structure includes Fixed Division and two limiting sections.Fixed Division has the connection structure for being configured for affixed exhaust tube.Two limiting sections are fixed in Fixed Division, and limiting section has limiting slot.Rocking bar location structure is configured under the drive for the movement that exhaust tube is engaged to the gas outlet of detected gas meter movement, and moving to makes the limiting slot of two limiting sections correspond to two rocking bars for being caught in gas meter movement to be detected and two rocking bars are defined in its extreme position.The beneficial effects of the invention are as follows gas meter movement sealing propertytest is efficient.
Description
Technical field
The present invention relates to gas meter movement detection fields, are sealed in particular to rocking bar location structure, gas meter movement
Property detection device and method.
Background technology
Country's gas meter movement sealing propertytest operation principle is that valve deck is fixed on a position at present, using negative pressure method
It is evacuated from gas meter, flow meter gas outlet direction, measurement chamber space is smaller and smaller, is measured at this time after epithelium runs to extreme position
Negative pressure value, and compared with the vacuum degree of equipment, measurement chamber's pressure drop is obtained, to judge the leakproofness of gas meter, flow meter.Multiple chambers
The leakproofness of room needs to carry out using same method multiple.Since the revolution volume of gas meter, flow meter is larger, a gas meter, flow meter is completed
Movement sealing propertytest need to take the gas of 0.5-1 revolution volume away, this needs to consume the long period so that when entire detection
Between it is long.
Invention content
The present invention is intended to provide a kind of rocking bar location structure, to solve gas meter movement sealing propertytest in the prior art
The problem of time long inefficiency.
Another object of the present invention is to provide a kind of gas meter movement leakproofness inspections having above-mentioned rocking bar location structure
Survey device.
The gas meter movement leakproofness inspection based on above-mentioned rocking bar location structure that it is still another object of the present invention to provide a kind of
Survey method.
What the embodiment of the present invention was realized in：
The embodiment of the present invention provides a kind of rocking bar location structure, for coordinating gas meter movement device for detecting sealability to use
To detect the leakproofness of gas meter movement, the gas meter movement device for detecting sealability includes the exhaust tube for pumping,
Including Fixed Division and limiting section.The Fixed Division includes the first plate and with the company for being configured for the affixed exhaust tube
Binding structure；The limiting section is fixed in first plate and parallel in the exhaust tube axis, and the limiting section has limit
Slot；When the exhaust tube moves to the gas outlet for pressing detected gas meter movement, the rocking bar location structure is constructed
At can be under the drive for the movement that exhaust tube is engaged to the gas outlet of detected gas meter movement, moving to makes two limiting sections
Limiting slot correspond to be caught in gas meter movement to be detected two rocking bars and two rocking bars are defined in its extreme position.
In an embodiment of the present embodiment：
It includes being removably connected to that the side of first plate far from the limiting section, which has notch, the connection structure,
First plate and the bracket for being closed the notch；First plate and the bracket for compressing the pumping jointly
Tracheae enables the rocking bar location structure and exhaust tube to form the entirety of associated movement.
In an embodiment of the present embodiment：
The bracket is removably attachable to the side of first plate by screw, and is closed the notch, encloses
Circumferentially be closed axially through matching hole, for accommodating and compressing affixed exhaust tube.
In an embodiment of the present embodiment：
First plate is long plate shape structure；The limiting section includes two the second plates of long slab shape；
Two second plates be connected to first plate with its be arranged the opposite other side in notch side length
To at both ends；And two second plates and first plate collectively form a U-shaped structure；
The opening of the limiting slot is set on the direction far from first plate of second plate.
In an embodiment of the present embodiment：
The limiting slot includes the lead segment close to channel opening and the limit section close to slot bottom；
The lead segment is outer imperial palace fine taper, and the limit section is the straight section that width is adapted to the width of rocking bar.
In an embodiment of the present embodiment：
The inner end width of the lead segment is equal to the width of the limit section.
The embodiment of the present invention also provides a kind of rocking bar location structure, for coordinating gas meter movement device for detecting sealability to make
To detect the leakproofness of gas meter movement, the gas meter movement device for detecting sealability includes the exhaust tube for pumping,
The rocking bar location structure includes the first plate and two the second plates, and first plate and two second plates are one
Body structure；Two second plates are vertically connected at first plate spaced reciprocally, constitute U-shaped structure；Described first
The wide of plate is equipped with notch to one side；First plate is removably connected with bracket, and the bracket lid closes described lack
Mouthful, form matching hole that is circumferentially closed, penetrating through in an axial direction；The matching hole is used to coordinate the pumping of gas meter movement sealing propertytest
Tracheae, and the rocking bar location structure and the exhaust tube is made to connect into the entirety of associated movement；Two second plates are remote
One end from first plate offers the limiting slot extended along matching hole perforation direction；It is with the cooperation axially bored line
Center, the center angle of projection of two limiting slots in the first plate plate face be equal to gas meter movement two shake
The center angle of bar central axes of the gas outlet of opposite gas meter movement in extreme position.
The embodiment of the present invention also provides a kind of modified gas meter movement device for detecting sealability, the modified gas meter, flow meter
Rocking bar location structure above-mentioned is connected on the exhaust tube of movement device for detecting sealability, and the rocking bar location structure is described
The extending direction of limiting slot is parallel to the axis of the exhaust tube.
In an embodiment of the present embodiment：
The outer end of the exhaust tube is equipped with radially outward widened boss, and the boss and the rocking bar location structure are in axis
To limit.
The embodiment of the present invention also provides a kind of gas meter movement method for conducting leak test, the gas meter movement leakproofness inspection
Survey method is based on rocking bar location structure above-mentioned；The gas meter movement method for conducting leak test includes preparation stage and formal pumping
Gas detection-phase；The preparation stage includes：
The exhaust tube of gas meter movement device for detecting sealability is set to move to pressing to the gas outlet direction of gas meter movement
Connect gas outlet；Under the drive of the movement of exhaust tube, rocking bar location structure on exhaust tube is fixed in by gas meter movement
Two rocking bars be defined in the extreme positions of both sides.
Rocking bar location structure in the embodiment of the present invention is fixedly connected on the exhaust tube of gas meter movement sealing propertytest,
When exhaust tube presses the gas outlet for connecting detected gas meter movement, the limiting slots of two limiting sections is moved with exhaust tube
To corresponding two rocking bars for forking gas meter movement, two rocking bars are made to be maintained at its both sides extreme position, you can be evacuated
Deng follow-up formal detecting step.
Therefore, using rocking bar location structure, gas meter movement device for detecting sealability and the gas meter, flow meter machine in the present embodiment
Core method for conducting leak test can greatly reduce the preparation stage needed for gas meter movement sealing propertytest, make movement leakproofness
Detection time shortens 40%, to improve whole detection efficiency.The effect is for the more gas meter movement of chamber to be detected
It is especially pronounced.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is that the modified gas meter movement device for detecting sealability in the embodiment of the present invention is used to detect gas meter movement
Mated condition figure when leakproofness；
Fig. 2 is the expansion view of Fig. 1；
Fig. 3 is the schematic diagram of rocking bar location structure provided in an embodiment of the present invention.
Icon：100- modified gas meter movement device for detecting sealability；10- rocking bar location structures；The Fixed Divisions 10a-；
The-the second plates of 10b '；10b- limiting sections；The first plates of 11-；12- brackets；20- gas meter movement device for detecting sealability；
20a- exhaust tubes；20b- boss；30- gas meter movements；30a- rocking bars；30b- gas outlets；30c- valve decks；C0- limiting slots；C1-
Lead segment；C2- limits section；K1- notches；K2- matching holes；D1- screws.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, below the detailed description of the embodiment of the present invention to providing in the accompanying drawings be not intended to limit it is claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiments of the present invention, this field is common
The every other embodiment that technical staff is obtained without making creative work belongs to the model that the present invention protects
It encloses.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.
In the description of the present invention, it should be noted that if occur term "center", "upper", "lower", "left", "right",
The orientation or positional relationship of the instructions such as "vertical", "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings,
Either the invention product using when the orientation or positional relationship usually put, be merely for convenience of the description present invention and simplification retouched
It states, does not indicate or imply the indicated device or element must have a particular orientation, with specific azimuth configuration and operation,
Therefore it is not considered as limiting the invention.If only being used in addition, occurring term " first ", " second " etc. in description of the invention
It is described in distinguishing, is not understood to indicate or imply relative importance.
If being not offered as requiring component absolute in addition, occurring the terms such as term "horizontal", "vertical" in description of the invention
Horizontal or pendency, but can be slightly tilted.If "horizontal" refers to only that its direction is more horizontal with respect to for "vertical", not
It is to indicate that the structure is had to fully horizontally, but can be slightly tilted.
Embodiment
Fig. 1 is that the modified gas meter movement device for detecting sealability 100 in the embodiment of the present invention is used to detect gas meter, flow meter
Mated condition figure when 30 leakproofness of movement.
Fig. 2 is the expansion view of Fig. 1.Referring to Fig. 2, the top of the detection object gas meter movement 30 of the present embodiment is set for cooperation
Set gas outlet 30b upward, two rocking bar 30a positioned at the both sides gas outlet 30b, the also structures such as valve deck 30c.Gas meter movement
30 inside have multiple measurement chamber's (not shown).Different measurement chamber can be made to be connected to gas outlet by rotary valve cover 30c
30b.And the leakproofness of negative pressure method measurement gas meter movement 30 is included in two rocking bar 30a of holding and is located at both sides extreme position
Under state, communicated therewith from gas outlet 30b extractions using the exhaust tube 20a of existing gas meter movement device for detecting sealability 20
The indoor gas of measurement chamber, then by negative pressure comparison judge leakproofness the step of.Generally for the combustion gas of more measurement chamber
Table movement 30 needs to carry out multiple aforesaid operations.Wherein, the positions rocking bar 30a are limited and practical measurement is unrelated, are the preparation stage.It is existing
There is technology that consumption more time is needed to carry out the stage, to there is a problem of that detection efficiency is low.
Modified gas meter movement device for detecting sealability 100 in the present embodiment is using in the existing combustion based on negative pressure method
The form of affixed rocking bar location structure 10, which is realized, on the exhaust tube 20a of 30 sealing propertytest platform of gas meter movement reduces needed for detection
Time preparation stage, to improve detection efficiency, make the movement sealing propertytest time shorten 40%.
Fig. 3 is the schematic diagram of rocking bar location structure 10 provided in an embodiment of the present invention.Cooperation is referring to Fig. 3, rocking bar positioning knot
Structure 10 includes Fixed Division 10a and two limiting section 10b.Fixed Division 10a has the connection for being configured for affixed exhaust tube 20a
Structure.Two limiting section 10b are fixed in Fixed Division 10a, and limiting section 10b has limiting slot C0.Pressure is moved in exhaust tube 20a
When closing the gas outlet 30b of detected gas meter movement 30, rocking bar location structure 10 is configured in exhaust tube 20a to institute
Under the drive for detecting the movement of the gas outlet 30b engagements of gas meter movement 30, the limiting slot C0 for making two limiting section 10b is moved to
It corresponds to two rocking bar 30a for being caught in gas meter movement 30 to be detected and two rocking bar 30a is defined in its extreme position.Rocking bar
The extending direction of the limiting slot C0 of location structure 10 is parallel to the axis of exhaust tube 20a.To realize exhaust tube 20a and rocking bar positioning
The outer end of the axially position of structure 10, exhaust tube 20a is equipped with radially outward widened boss 20b.Under normal circumstances, exhaust tube
The movement that 20a is engaged to the gas outlet 30b of detected gas meter movement 30 is close to gas outlet 30b along gas outlet 30b axis
Until the movement of engagement.
In an embodiment of the present embodiment, cooperation referring to Fig. 2, Fig. 3, Fixed Division 10a include side have notch
It the first plate 11 of K1 and is removably attachable to the first plate 11 and is closed the bracket 12 of notch K1.First plate 11 and tight
Gu item 12 enables rocking bar location structure 10 and exhaust tube 20a to form the whole of associated movement for compressing exhaust tube 20a jointly
Body.Wherein, two holes are set on bracket 12, and are removably attachable to the side of the first plate 11 by two screw D1,
And be closed notch K1, surround circumferential closure axially through matching hole K2 realize for accommodating and compress affixed exhaust tube 20a
Rocking bar location structure 10 is fixed on exhaust tube 20a.
Continue cooperation referring to Fig. 2, Fig. 3, in an embodiment of the present embodiment, the first plate 11 is long plate shape knot
Structure.Limiting section 10b is the second plate 10b ' of long slab shape.Two the second plate 10b ' are connected to being arranged with it for the first plate 11
The length of the opposite other side in the sides notch K1 is at both ends.And two the second plate 10b ' and the first plate 11 collectively form one
U-shaped structure.Limiting slot C0 is opened in one end far from the first plate 11 of the second plate 10b '.For convenience of guiding rocking bar 30a into
Enter limiting slot C0, limiting slot C0 includes the lead segment C1 close to the channel opening and limit section C2 close to slot bottom.Lead segment C1 is outer
Imperial palace fine taper, limit section C2 are the straight section that width is adapted to the width of rocking bar 30a.In exhaust tube 20a axially move closer to outlet
When cylinder 30b, two limiting slot C0 ultimately form exhaust tube 20a pressing connection outlets also axially move closer to two rocking bar 30a
Cylinder 30b, two limiting slot C0 are caught on two rocking bar 30a, and rocking bar 30a are limited to the state of lateral limit position.It is aforementioned
The lead segment C1 that outer imperial palace fine taper is arranged can easily guide rocking bar 30a to enter so that even if its pole is deviateed in the positions rocking bar 30a
Extreme position still is able to be directed into limiting slot C0, and rocking bar 30a is finally made to accurately define in the limit section C2 of limiting slot C0.
To further ensure that limit is accurate, the inner end width of lead segment C1 is equal to the width of limit section C2.
Whole description rocking bar location structure 10 provided in an embodiment of the present invention below.Continue to coordinate referring to Fig. 1, Fig. 2, Fig. 3,
Rocking bar location structure 10 in the present embodiment is for coordinating gas meter movement device for detecting sealability 20 to use, to detect gas meter, flow meter
The leakproofness of movement 30, gas meter movement device for detecting sealability 20 include the exhaust tube 20a for pumping comprising the first plate
Part 11 and two the second plate 10b ', the first plate 11 and two the second plate 10b ' are structure as a whole.Two the second plates
10b ' is vertically connected at the first plate 11 spaced reciprocally, constitutes U-shaped structure.The wide of first plate 11 is equipped with notch to one side
K1.First plate 11 is removably connected with bracket 12, and the lid of bracket 12 closes notch K1, and formation is circumferentially closed, penetrates through in an axial direction
Matching hole K2.Matching hole K2 is used to coordinate the exhaust tube 20a of 30 sealing propertytest of gas meter movement, and makes rocking bar location structure
10 and exhaust tube 20a connects into the entirety of associated movement.The one end of two the second plate 10b ' far from the first plate 11 offers
The limiting slot C0 extended along matching hole K2 perforations direction.Centered on matching hole K2 axis, two limiting slot C0 are in the first plate
The center angle of projection in 11 plate faces opposite gas meter, flow meter machine in extreme position equal to two rocking bar 30a of gas meter movement 30
The center angle of the central axes of the gas outlet 30b of core 30 so that after engagement, rocking bar 30a can be limited to its both sides limit position
It sets.
Referring to Fig. 1, Fig. 2, Fig. 3, the embodiment of the present invention also provides a kind of gas meter movement method for conducting leak test for cooperation,
Based on rocking bar location structure 10 above-mentioned.The gas meter movement method for conducting leak test includes that preparation stage and formal pumping detect
Stage.Preparation stage includes：Make the exhaust tube 20a of gas meter movement device for detecting sealability 20 to the outlet of gas meter movement 30
The directions cylinder 30b move to pressing and connect gas outlet 30b.Under the drive of the movement of exhaust tube 20a, it is fixed in exhaust tube 20a
On rocking bar location structure 10 two rocking bar 30a of gas meter movement 30 are defined in the extreme positions of both sides.It is tied in the preparation stage
It can carry out formally being evacuated detection-phase after beam.
Rocking bar location structure 10 in the embodiment of the present invention is fixedly connected on the pumping of 30 sealing propertytest of gas meter movement
On pipe 20a, when the gas outlet 30b of detected gas meter movement 30 is connected in exhaust tube 20a pressing, two limiting section 10b's
Limiting slot C0 corresponding two rocking bar 30a for forking gas meter movement 30 as exhaust tube 20a is moved to, make two rocking bar 30a protect
It holds in its both sides extreme position, you can carry out the follow-up formal detecting step such as being evacuated.
Therefore, using rocking bar location structure 10, gas meter movement device for detecting sealability 20 and the combustion gas in the present embodiment
Table movement method for conducting leak test can greatly reduce time preparation stage needed for gas meter movement sealing propertytest, in turn
Improve whole detection efficiency.The effect is especially pronounced for the more gas meter movement 30 of chamber to be detected.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of rocking bar location structure, for coordinating gas meter movement device for detecting sealability to use to detect gas meter movement
Leakproofness, the gas meter movement device for detecting sealability include the exhaust tube for pumping, it is characterised in that：
Further include：
Fixed Division, the Fixed Division include the first plate and with the connection structure for being configured for the affixed exhaust tube；
Limiting section, the limiting section are fixed in first plate and parallel in the exhaust tube axis, and the limiting section has
Limiting slot；
When the exhaust tube moves to the gas outlet for pressing detected gas meter movement, the rocking bar location structure is constructed
At can be under the drive for the movement that exhaust tube is engaged to the gas outlet of detected gas meter movement, moving to makes two limiting sections
Limiting slot correspond to be caught in gas meter movement to be detected two rocking bars and two rocking bars are defined in its extreme position.
2. rocking bar location structure according to claim 1, it is characterised in that：
The side of first plate far from the limiting section has notch, the connection structure described including being removably connected to
First plate and the bracket for being closed the notch；First plate and the bracket for compressing the pumping jointly
Pipe, enables the rocking bar location structure and exhaust tube to form the entirety of associated movement.
3. rocking bar location structure according to claim 2, it is characterised in that：
The bracket is removably attachable to the side of first plate by screw, and is closed the notch, surrounds week
To be closed axially through matching hole, for accommodating and compressing affixed exhaust tube.
4. rocking bar location structure according to claim 2, it is characterised in that：
First plate is long plate shape structure；The limiting section includes two the second plates of long slab shape；
What two second plates were connected to first plate is arranged the length of the opposite other side in notch side to two with it
At end；And two second plates and first plate collectively form a U-shaped structure；
The opening of the limiting slot is set on the direction far from first plate of second plate.
5. rocking bar location structure according to claim 4, it is characterised in that：
The limiting slot includes the lead segment close to channel opening and the limit section close to slot bottom；
The lead segment is outer imperial palace fine taper, and the limit section is the straight section that width is adapted to the width of rocking bar.
6. rocking bar location structure according to claim 5, it is characterised in that：
The inner end width of the lead segment is equal to the width of the limit section.
7. a kind of rocking bar location structure, for coordinating gas meter movement device for detecting sealability to use to detect gas meter movement
Leakproofness, the gas meter movement device for detecting sealability include the exhaust tube for pumping, it is characterised in that：
The rocking bar location structure includes the first plate and two the second plates, first plate and two second plates
It is structure as a whole；Two second plates are vertically connected at first plate spaced reciprocally, constitute U-shaped structure；
The wide of first plate is equipped with notch to one side；First plate is removably connected with bracket, the fastening
Item lid closes the notch, forms matching hole that is circumferentially closed, penetrating through in an axial direction；The matching hole is for coordinating gas meter movement close
The exhaust tube of envelope property detection, and the rocking bar location structure and the exhaust tube is made to connect into the entirety of associated movement；
Two one end of second plate far from first plate offer the limit extended along matching hole perforation direction
Position slot；Centered on the cooperation axially bored line, the center of projection of two limiting slots in the first plate plate face presss from both sides
Angle is equal to the center folder of two rocking bars central axes of the gas outlet of opposite gas meter movement in extreme position of gas meter movement
Angle.
8. a kind of modified gas meter movement device for detecting sealability, it is characterised in that：
It is connected with described in claim any one of 1-7 and shakes on the exhaust tube of the modified gas meter movement device for detecting sealability
Bar location structure, and the extending direction of the limiting slot of the rocking bar location structure is parallel to the axis of the exhaust tube.
9. modified gas meter movement device for detecting sealability according to claim 8, it is characterised in that：
The outer end of the exhaust tube is equipped with radially outward widened boss, and the boss and the rocking bar location structure are in axial limit
Position.
10. a kind of gas meter movement method for conducting leak test, it is characterised in that：
The gas meter movement method for conducting leak test is based on claim 1-7 any one of them rocking bar location structures；It is described
Gas meter movement method for conducting leak test includes preparation stage and formal pumping detection-phase；
The preparation stage includes：
Make the exhaust tube of gas meter movement device for detecting sealability move to pressing to the gas outlet direction of gas meter movement to connect
Gas outlet；Under the drive of the movement of exhaust tube, rocking bar location structure on exhaust tube is fixed in by the two of gas meter movement
Rocking bar is defined in the extreme position of both sides.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811033085.8A CN108760193B (en) | 2018-09-05 | 2018-09-05 | Rocker positioning structure, gas meter movement tightness detection device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811033085.8A CN108760193B (en) | 2018-09-05 | 2018-09-05 | Rocker positioning structure, gas meter movement tightness detection device and method |
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| CN108760193A true CN108760193A (en) | 2018-11-06 |
| CN108760193B CN108760193B (en) | 2023-06-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113029445A (en) * | 2019-12-24 | 2021-06-25 | 沈阳新松机器人自动化股份有限公司 | Gas table core reveals accredited testing organization |
| CN114260698A (en) * | 2020-09-16 | 2022-04-01 | 成都秦川物联网科技股份有限公司 | Device and method for assembling rocker and flag of Internet of things intelligent gas meter |
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