CN206330625U - Ultrasonic wave pipe connecting structure and ultrasonic wave gas meter - Google Patents

Abstract

The utility model provides a kind of ultrasonic wave pipe connecting structure and ultrasonic wave gas meter, is related to gas-fired equipment field.The ultrasonic wave pipe connecting structure include gas meter shell and connecting pipe, gas meter shell include air inlet, gas outlet and inner chamber, air inlet, gas outlet respectively with intracavity inter-connection.Connecting pipe is arranged in inner chamber, and gas outlet is connected with connecting pipe, and connecting pipe includes the joint fixed part for being provided with screw, and connecting pipe is fixedly connected by screw through joint fixed part with gas meter shell.Ultrasonic wave gas meter includes ultrasonic wave module and above-mentioned ultrasonic wave pipe connecting structure, and ultrasonic wave module is arranged in chamber resettling, and ultrasonic wave module is connected by connecting pipe with the gas outlet of gas meter shell.The ultrasonic wave pipe connecting structure is simple, stable connection, it is easy to operate, and the gas flow rate that can preferably ensure to flow through in the ultrasonic wave gas meter is stable, so as to the accurate measurement actually used amount of combustion gas.

Description

Ultrasonic wave pipe connecting structure and ultrasonic wave gas meter

Technical field

The utility model is related to gas-fired equipment field, in particular to a kind of ultrasonic wave pipe connecting structure and ultrasound Ripple gas meter, flow meter.

Background technology

The gas meter, flow meter of prior art, substantially stem-winder (mechanical diaphragm gas meter), its counting principle are to utilize combustion The flowing of gas drives count code wheel to rotate what is counted, due to being mechanical rotation structure, there is counting error scope larger (outstanding It measures inaccurate in low flow volume region), table body volume larger (take larger installing space), when in use between slightly grow after shape Into aging reduce the deficiencies such as measuring accuracy.With advances in technology, ultrasonic wave gas gauge table (combustion gas stereometer is occurred in that Scale), the reliability and precision of ultrasonic wave module mounting structure are all higher, however, because ultrasonic wave gas meter measures gas stream Speed is unstable, causes measurement inaccurate.

In summary, how to ensure that air-flow is steady, accurate measurement combustion gas usage amount, is that those skilled in the art urgently solves Technical problem certainly.

Utility model content

The purpose of this utility model is to provide a kind of ultrasonic wave pipe connecting structure, passes through screw connecing connecting pipe Head fixed part is fixedly connected with gas meter shell, and simple in construction, stable connection, the ultrasonic wave pipe connecting structure makes combustion gas from the company Adapter road enters the gas outlet of gas meter shell, ensure that air-flow is steady, accurately combustion gas usage amount is measured.

The purpose of this utility model is also resided in there is provided a kind of ultrasonic wave gas meter, the gas meter, flow meter include ultrasonic wave module with Above-mentioned ultrasonic wave pipe connecting structure, because ultrasound mode is arranged in the inner chamber of gas meter shell, passes through the ultrasonic wave duct Pipeline connecting structure makes the outlet side of the ultrasonic wave module be connected with the gas outlet of gas meter shell, it is ensured that out-of-date steady of combustion gas stream Property.

What embodiment of the present utility model was realized in：

Based on above-mentioned purpose, embodiment of the present utility model provides a kind of ultrasonic wave pipe connecting structure, including combustion gas Watchcase and connecting pipe, gas meter shell include air inlet, gas outlet and inner chamber, and air inlet, gas outlet are connected with inner chamber respectively It is logical；Connecting pipe is arranged in inner chamber, and gas outlet is connected with connecting pipe, and connecting pipe includes the joint for being provided with screw Connecting pipe is fixedly connected by fixed part, screw through joint fixed part with gas meter shell.

In embodiment of the present utility model, the air inlet of gas meter shell, gas outlet and intracavity inter-connection, connecting pipe Joint fixed part be fixedly connected by screw with gas meter shell, simple in construction, stable connection.

In addition, the parallel flow condenser provided according to embodiment of the present utility model, can also have skill additional as follows Art feature：

In alternative embodiment of the present utility model, packing ring is additionally provided between gas meter shell and connecting pipe, packing ring is solid Surely the lower section for the gas outlet being arranged in inner chamber.

In alternative embodiment of the present utility model, packing ring is provided with the internal thread with screw fit, packing ring and gas meter, flow meter Shell rivething is set.

In alternative embodiment of the present utility model, connecting pipe also includes joint embedded division, and joint embedded division is arranged at The side of the close gas outlet of joint fixed part, the outer wall of joint embedded division is engaged with the inwall of gas outlet；Joint embedded division The first groove is provided with, the first groove is used to be embedded the seal washer for being tightly connected pipeline and gas outlet.

In alternative embodiment of the present utility model, packing ring is circumferentially arranged at least two lock ears, and lock ear is provided with Screwed hole.

In alternative embodiment of the present utility model, joint fixed part includes fixed part body and fixed ear, fixed ear Circumference of the portion along fixed body is uniformly arranged.

In alternative embodiment of the present utility model, the quantity of fixed ear is identical with the quantity of lock ear；Each fixed ear Portion to be provided with and wear groove for what screw was worn, and the screwed hole for wearing groove with lock ear is corresponding.

In alternative embodiment of the present utility model, fixed ear is column, wears central axis of the groove along fixed ear Through setting, screw wears groove and is threadedly coupled with screwed hole.

In alternative embodiment of the present utility model, fixed ear includes first and second, first and fixed part Body is connected, second relative to first away from fixed part body, first, second and fixed part body are surrounded and worn The opening of groove；All openings are rotated clockwise setting relative to the central axis of connecting pipe, or all openings are relative Set in the central axis counterclockwise rotates of connecting pipe.

Embodiment of the present utility model additionally provides a kind of ultrasonic wave gas meter, including ultrasonic wave module and above-mentioned ultrasound Wave duct pipeline connecting structure, ultrasonic wave module is arranged in chamber resettling, and ultrasonic wave module passes through connecting pipe and gas meter shell Gas outlet connection.

The beneficial effect of the utility model embodiment is：The ultrasonic wave pipe connecting structure is simple, stable connection, it is easy to grasp Make, the gas flow rate that can preferably ensure to flow through in the ultrasonic wave gas meter is stable, it is actual so as to accurate measurement combustion gas Usage amount.

To sum up, the utility model embodiment is provided ultrasonic wave pipe connecting structure and ultrasonic wave gas meter, it is simple in construction, Steadiness is preferably, more convenient in assembling, preferable to flowing through the stability of gas flow rate of the connecting pipe, so as to accurate Measurement combustion gas usage amount.

Brief description of the drawings

, below will be to be used needed for embodiment in order to illustrate more clearly of the technical scheme of the utility model embodiment Accompanying drawing be briefly described, it will be appreciated that the following drawings illustrate only some embodiments of the present utility model, therefore should not be by Regard the restriction to scope as, for those of ordinary skill in the art, on the premise of not paying creative work, may be used also To obtain other related accompanying drawings according to these accompanying drawings.

Fig. 1 is the schematic diagram at a visual angle of the ultrasonic wave pipe connecting structure that the utility model embodiment 1 is provided；

Fig. 2 is the schematic diagram at the first visual angle of gas meter shell in Fig. 1；

Fig. 3 is the schematic diagram at Fig. 2 the second visual angle；

Fig. 4 is the schematic diagram at a visual angle of Fig. 1 middle washers；

Fig. 5 is the schematic diagram at the first visual angle of connecting pipe in Fig. 1；

Fig. 6 is the schematic diagram at Fig. 5 the second visual angle；

Fig. 7 is the schematic diagram at Fig. 5 the 3rd visual angle；

Fig. 8 is the first visual angle of connecting pipe in the ultrasonic wave pipe connecting structure that the utility model embodiment 2 is provided Schematic diagram；

Fig. 9 is the schematic diagram at Fig. 8 the second visual angle；

Figure 10 is the schematic diagram of ultrasonic wave module in the ultrasonic wave gas meter that the utility model embodiment 3 is provided；

Figure 11 is the schematic diagram for the ultrasonic wave gas meter that the utility model embodiment 3 is provided.

Icon：100- ultrasonic wave pipe connecting structures；10- gas meter shells；13- shell bodies；15- air inlets；18- boss； 22- fixed parts；25- gas outlets；28- packing rings；30- lock ears；35- inner chambers；40- connecting pipes；42- joint fixed parts；45- joints Embedded division；The grooves of 47- first；48- fixes ear；50- first；52- second；60- wears groove；62- screws；70- ultrasounds Ripple gas meter, flow meter；72- ultrasonic wave modules；74- module bodies；76- inlet ends；78- outlet sides.

Embodiment

It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer Accompanying drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that retouched The embodiment stated is a part of embodiment of the utility model, rather than whole embodiments.

Therefore, the detailed description of embodiment of the present utility model below to providing in the accompanying drawings is not intended to limit requirement The scope of the present utility model of protection, but it is merely representative of selected embodiment of the present utility model.Based in the utility model Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all Belong to the scope of the utility model protection.

It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi It is defined in individual accompanying drawing, then it further need not be defined and explained in subsequent accompanying drawing.

, it is necessary to which explanation, term " first ", " second ", " the 3rd " etc. are only used for area in description of the present utility model Divide description, and it is not intended that indicating or implying relative importance.

In description of the present utility model, in addition it is also necessary to which explanation, unless otherwise clearly defined and limited, term " are set Put ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary, Ke Yishi The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this Concrete meaning in utility model.

Embodiment of the present utility model is described in detail below in conjunction with accompanying drawing, but the utility model can be by right It is required that the multitude of different ways for limiting and covering is implemented.

Wherein Fig. 1-Fig. 7 correspondences embodiment 1 of the present utility model, Fig. 8-Fig. 9 correspondences embodiment 2 of the present utility model, figure 10- Figure 11 correspondences embodiment 3 of the present utility model, is carried out below in conjunction with accompanying drawing to the technical scheme of the utility model embodiment It is described in detail.

Embodiment 1

It refer to shown in Fig. 1, the ultrasonic wave pipe connecting structure 100 that embodiment 1 of the present utility model is provided mainly includes Gas meter shell 10 and connecting pipe 40.

Concrete structure below to all parts and corresponding relation each other are described in detail.

First, the structure to gas meter shell 10 is described in detail, and refer to shown in Fig. 2, and the gas meter shell 10 includes shell Body 13, air inlet 15 and gas outlet 25, air inlet 15 and gas outlet 25 are arranged on the top of shell body 13, gas meter shell 10 Shell body 13 in be provided with inner chamber 35, air inlet 15 and gas outlet 25 connect with the inner chamber 35 respectively.

In embodiment 1 of the present utility model, air inlet 15 is open column shape, including boss 18 and fixed part 22, boss 18 are located between shell body 13 and fixed part 22, and boss 18 and fixed part 22 are cylindric, and the outside dimension of boss 18 is more than The outside dimension of the fixed part 22, and the central axes of the central axis of the boss 18 and the fixed part 22, the fixed part 22 include inner and outer wall, the central axis of the inwall and the central axes of the outer wall, and the inwall is smooth wall, outer wall It is provided with the external screw thread being engaged with gas pipeline.

The gas outlet 25 is identical with the shape of air inlet 15, and size dimension is also identical, and uniform on the top of shell body 13 Distribution.The air inlet 15 and gas outlet 25 are integrally formed with shell body 13 respectively so that combustion gas enters at air inlet 15, are passed through Discharged at gas outlet 25 inner chamber 35.

It refer to shown in Fig. 2 and Fig. 3, in embodiment 1 of the present utility model, under the gas outlet 25 in gas meter shell 10 Side is fixedly installed packing ring 28 with threaded hole, and the packing ring 28 includes centre bore and screwed hole, and along the circumferentially disposed of packing ring 28 There are at least two lock ears 30, as shown in figure 4, being provided with screwed hole in each lock ear 30, the quantity of lock ear 30 is two, packing ring The axis of 28 centre bores and the central axes of gas outlet 25.

In embodiment 1 of the present utility model, the mode being fixedly installed between packing ring 28 and shell body 13 is riveting.In riveting When connecing, the packing ring 28 can rotate around the axis of centre bore, select different angles to be riveted, so as to being connected thereto The setting angle of ultrasonic wave module 72 be adjusted.

In embodiment 1 of the present utility model, the air inlet 15 and gas outlet 25 are integrally formed with shell body 13 respectively, are made Obtain combustion gas at air inlet 15 to enter, discharged by inner chamber 35 at gas outlet 25.

Secondly, the structure to connecting pipe 40 is described in detail, and refer to shown in Fig. 5, and connecting pipe 40 includes joint Fixed part 42 and joint embedded division 45, in connection status, joint embedded division 45 is relative to joint fixed part 42 close to going out The side of gas port 25, joint fixed part 42 is fixedly connected with joint embedded division 45, and the thickness of the joint fixed part 42 is less than The thickness of joint embedded division 45, the outside dimension of the joint fixed part 42 is more than the outside dimension of joint embedded division 45.Under Structure and annexation in face of joint embedded division 45 and joint fixed part 42 elaborate respectively.

It refer to shown in Fig. 6, the outer surface of joint embedded division 45 is provided with the first groove 47, first groove 47 is used for solid Seal washer is determined, so that the connecting pipe 40 and gas outlet 25 be sealed.In embodiment 1 of the present utility model, this is first recessed Groove 47 is arranged at one end of the remote joint fixed part 42 of joint embedded division 45, certainly, and the first groove 47, which can also be arranged on, to be connect The other positions of head embedded division 45, as long as seal washer is fixed at the first groove 47, it is ensured that the connecting pipe 40 and outlet Sealing property between mouth 25.

In embodiment 1 of the present utility model, joint embedded division 45 is tubulose, and the wall thickness phase of the joint embedded division 45 Deng, i.e. central axes of the central axis of its outer wall and inwall, the inner and outer wall of the joint embedded division 45 is smooth Wall, joint embedded division 45 with external connector when being engaged, and inner surface and the external of gas meter shell 10 of joint embedded division 45 connect The outer surface of head is engaged, or the outer surface of joint embedded division 45 is engaged with the inner surface of external connector.I.e.：When the joint When embedded division 45 is plugged in inside external connector, the outer surface of the joint embedded division 45 is engaged with the inner surface of external connector, And the seal washer set in the first groove 47 of the joint embedded division 45 seals connecting pipe 40 and external connector；When this connects When head embedded division 45 is plugged in the outside of external connector, the inner surface of the joint embedded division 45 and the outer surface of external connector match Close, in this case, no first groove 47 in outer surface of joint embedded division 45 by seal washer, it is necessary to be arranged on external connector Outer surface, be then inserted into the inner surface of joint embedded division 45, complete the sealing of connecting pipe 40 and external connector.In this reality With in new embodiment 1, it is preferable that be arranged on the outside of external connector, i.e. joint embedded division 45 using joint embedded division 45 One end of remote joint fixed part 42 be provided with the first groove 47, seal washer is set in the first groove 47, for this to be connected Adapter road 40 is sealed with external connector.

Joint fixed part 42 is discoideus, and the joint fixed part 42 is circumferentially provided with fixed ear 48, for wearing solid Determine the screw 62 of connecting tube and gas meter shell 10, the quantity at least two of fixed ear 48 is distributed in joint fixed part 42 It is circumferential, can be uniformly distributed or symmetrical, can also be random distribution, it is preferable that fixed ear 48 sets up separately Put the circumference in joint fixed part 42.Certainly, the shape of fixed ear 48 also has a variety of, in embodiment 1 of the present utility model, Fixed ear 48, which is provided with, wears groove 60, wears groove 60 and make it that fixed ear 48 forms opening after being connected with joint fixed part 42, Joint fixed part 42 is plectane, and its side wall for being provided with fixed ear 48 is planar wall.

Continue referring to shown in Fig. 7, the fixation ear 48 includes first 50 and second 52, first 50 is consolidated with joint Determine the planar wall connection in portion 42, and first 50 is set perpendicular to the planar wall, first 50 and planar wall junction circular arc mistake Cross, second 52 is fixedly connected parallel to above-mentioned planar wall with first 50, and the junction of second 52 and first 50 Arc transition, the fixation ear 48 of first 50 and second 52 formation is formed with opening after being connected with joint fixed part 42 Groove 60 is worn, in embodiment 1 of the present utility model, fixed ear 48 there are two and is evenly distributed on the week of joint fixed part 42 Relative to the central axis of connecting pipe 40 be opposite direction to the opening of, the fixation ear 48, i.e., one of fixed ear Upwards, another fixes the opening direction of ear 48 downwards to 48 opening direction, in other words the opening phase of two fixed ears 48 All it is the setting that turns clockwise for central axis, or the opening of two fixed ears 48 relative to central axis is all the inverse time Pin rotary setting.

The ultrasonic wave pipe connecting structure 100 that the utility model embodiment 1 is provided also includes screw 62, and the screw 62 is passed through Connecting pipe 40 is fixedly connected by joint fixed part 42 with gas meter shell 10, and the screw 62 can be other kinds of fastener, For example：Bolt, pin etc., only need to make connecting pipe 40 it be fixed i.e. with gas meter shell 10 by way of fastener is fixed Can.In the utility model embodiment 1, it is preferable that fastener is screw 62, and certainly, the species of the screw 62, model are not limited System, can be a variety of for soket head cap screw, lock-screw, holding screw or fluting plain screw etc., in assembling process, the screw 62 Groove 60 is worn through in the fixation ear 48 of connecting pipe 40, is fixedly connected with gas meter shell 10.

In embodiment 1 of the present utility model, the quantity of fixation ear 48 and above-mentioned packing ring 28 on joint fixed part 42 The quantity of lock ear 30 is identical, and screw 62 passes through the corresponding threaded holes for wearing groove 60 and the lock ear 30 of packing ring 28 of the fixation ear 48 Close, that is, be threadedly coupled.

The ultrasonic wave pipe connecting structure 100 that the utility model embodiment 1 is provided is measured for ultrasonic wave gas meter 70 Gas flow rate is unstable, so that connecting pipe 40 be fixedly connected by way of screw 62 is connected with gas meter shell 10, this surpasses Simply, conveniently, the screwed hole of screw 62 and the packing ring 28 being riveted on gas meter shell 10 coordinates to be connected acoustic wave pipeline attachment structure 100 Connect, connecting pipe 40 is closely connected with the gas outlet 25 of gas meter shell 10, and ensure that the sealing of interface.Make assembling The air-flow that gas is measured in ultrasonic wave gas meter 70 afterwards is steady, and combustion gas usage amount is measured so as to accurate, and easy to operate.

The beneficial effect of ultrasonic wave pipe connecting structure 100 that the utility model embodiment 1 is provided is：

First, the gas outlet 25 of gas meter shell 10 is fixedly connected with connecting pipe 40 using screw 62, the ultrasonic wave pipeline Connection ensure that the gas flow rate flowed through in the ultrasonic wave gas meter 70 is stable, accurate measurement combustion gas usage amount.

2nd, the ultrasonic wave pipe connecting structure 100 is simple, stable connection, it is easy to operate.

3rd, the joint of ultrasonic wave pipeline connection is provided with seal washer, preferably ensure that ultrasonic wave is flowed through in combustion gas The air-tightness of gas meter, flow meter 70, so as to ensure security reliability.

4th, the ultrasonic wave pipe connecting structure 100 riveting in the inner chamber 35 of gas meter shell 10 has packing ring with threaded hole 28, packing ring 28 is integrally formed with gas meter shell 10, screw 62 passes through the fixation ear 48 of joint fixed part 42, with the spiral shell of packing ring 28 Line is connected, easy to connect, clever structure.

Embodiment 2

The ultrasonic wave pipe connecting structure 100 provided the utility model can also be made on the basis of above-described embodiment 1 Go out following optional other structures schemes, be described as follows：

Refer to shown in Fig. 8 and Fig. 9, in the utility model embodiment 2, the joint fixed part 42 of connecting pipe 40 except Above-mentioned to be worn with opening outside the structure of groove 60, the fixation ear 48 of joint fixed part 42 can also be column, and the column is consolidated Determine ear 48 and the arc transition of joint fixed part 42, and be provided with the central axis of the fixation ear 48 axially through wear If groove 60, i.e., this wears groove 60 for through hole, during assembling, and screw 62 wears groove 60 and be riveted on combustion gas through the fixation ear 48 The packing ring 28 with threaded hole of watchcase 10 is threadedly coupled, so that connecting pipe 40 be fixedly connected with gas meter shell 10.

Certainly, the quantity of the fixation ear 48 can be multiple, as long as meet the quantity of fixed ear 48 with it is with threaded hole Packing ring 28 the quantity of lock ear 30 it is equal, be both provided with screwed hole in each lock ear 30, fixed ear 48 wears groove 60 Corresponded with the upper screwed hole of lock ear 30.Multiple fixed ears 48 can be symmetrical arranged along the circumference of joint fixed part 42, also may be used To be to be uniformly arranged, random setting is can also be, only meeting fastener can be by connecting pipe 40 by the fixation ear 48 It is fixedly connected with gas meter shell 10.

Embodiment 3

The utility model embodiment 3 provides a kind of ultrasonic wave gas meter 70, and it includes above-mentioned ultrasonic wave pipeline connection Zero of structure 100 and ultrasonic wave module 72, the below concrete structure to ultrasonic wave module 72 and the ultrasonic wave gas meter 70 Part correlation is described in detail.

First, the structure to ultrasonic wave module 72 is described in detail, and refer to shown in Figure 10, and ultrasonic wave module 72 includes Module body 74, inlet end 76 and outlet side 78, wherein inlet end 76 and outlet side 78 are oppositely disposed in module body 74 Both sides, be provided with gas channel in module body 74, the gas channel is connected with inlet end 76, outlet side 78.So that combustion gas Enter from inlet end 76, flow through gas channel, flowed out from outlet side 78.

Outlet side 78 is annular shape, including sealing and Access Division, sealing position between module body 74 and Access Division, The sealing includes inwall, and the inwall is engaged with the outer wall of the embedded division of ultrasonic wave module 72 of connecting pipe 40, by positioned at O-ring sealing in default second groove of the embedded division of ultrasonic wave module 72.The external diameter of the Access Division is more than above-mentioned sealing Multiple necks are provided with external diameter, and Access Division, in embodiment 3 of the present utility model, pocket numbers are 4.

It refer to shown in Figure 11, in embodiment 3 of the present utility model, ultrasonic wave module 72 passes through above-mentioned ultrasonic wave pipeline Attachment structure 100 is connected with the gas outlet 25 of gas meter shell 10.In the ultrasonic wave gas meter 70 in use state, the ultrasound The air inlet 15 of ripple gas meter, flow meter 70 and gas outlet 25 are respectively positioned on the top of gas meter shell 10, and ultrasonic wave module 72 is arranged at gas meter, flow meter In the inner chamber 35 of shell 10, it is connected by the ultrasonic wave pipe connecting structure 100 with the gas outlet 25 of gas meter shell 10.

Ultrasonic wave gas meter 70 that embodiment 3 of the present utility model is provided has the beneficial effect that：Ultrasonic wave module 72 is set In inner chamber 35 in gas meter shell 10, connecting pipe 40 is fixedly connected with gas meter shell 10 by screw 62, and in ultrasound Sealing is provided between ripple module 72 and connecting pipe 40, and between the gas outlet 25 of connecting pipe 40 and gas meter shell 10 Packing ring.Both sealing of the air-flow by the ultrasonic wave gas meter 70, security had been ensure that, the connection of connecting pipe 40 is in turn ensure that Steadiness, and the stationarity that air-flow passes through.

It should be noted that in the case where not conflicting, the feature in embodiment in the utility model can be tied mutually Close.

Preferred embodiment of the present utility model is the foregoing is only, the utility model is not limited to, for this For the technical staff in field, the utility model can have various modifications and variations.It is all it is of the present utility model spirit and principle Within, any modifications, equivalent substitutions and improvements made etc. should be included within protection domain of the present utility model.

Claims (10)

1. a kind of ultrasonic wave pipe connecting structure, it is characterised in that including gas meter shell and connecting pipe, the gas meter shell bag Include air inlet, gas outlet and inner chamber, the air inlet, the gas outlet respectively with the intracavity inter-connection；

The connecting pipe is arranged in the inner chamber, and the gas outlet is connected with the connecting pipe, the connecting tube Road includes the joint fixed part for being provided with screw, and the screw passes through the joint fixed part by the connecting pipe and the combustion Gas meter shell is fixedly connected.

2. ultrasonic wave pipe connecting structure according to claim 1, it is characterised in that the gas meter shell and the connection Packing ring is additionally provided between pipeline, the packing ring is fixedly installed on the lower section of the gas outlet in the inner chamber.

3. ultrasonic wave pipe connecting structure according to claim 2, it is characterised in that the packing ring is provided with and the spiral shell The internal thread coordinated is followed closely, the packing ring is riveted with the gas meter shell and set.

4. ultrasonic wave pipe connecting structure according to claim 2, it is characterised in that the connecting pipe also includes joint Embedded division, the joint embedded division is arranged at the side of the close gas outlet of the joint fixed part, the joint insertion The outer wall in portion is engaged with the inwall of the gas outlet；

The joint embedded division is provided with the first groove, first groove be used to being embedded the sealing connecting pipe with it is described go out The seal washer of gas port.

5. ultrasonic wave pipe connecting structure according to claim 3, it is characterised in that the packing ring is circumferentially arranged have to Few two lock ears, the lock ear is provided with screwed hole.

6. ultrasonic wave pipe connecting structure according to claim 5, it is characterised in that the joint fixed part includes fixing Portion's body and fixed ear, circumference of the fixed ear along the fixed body are uniformly arranged.

7. ultrasonic wave pipe connecting structure according to claim 6, it is characterised in that the quantity of the fixed ear and institute The quantity for stating lock ear is identical；

Each fixed ear, which is provided with, wear groove, the spiral shell for wearing groove and the lock ear for what the screw was worn Pit is corresponding.

8. ultrasonic wave pipe connecting structure according to claim 7, it is characterised in that the fixed ear is column, institute State and wear central axis of the groove along the fixed ear through setting, the screw wears groove and the screwed hole spiral shell through described Line is connected.

9. ultrasonic wave pipe connecting structure according to claim 7, it is characterised in that the fixed ear includes first With second, described first and fixed part body connection, described second relative to described first away from described solid Determine portion's body, described first, described second and the fixed part body surround the opening for wearing groove；

All openings are rotated clockwise setting relative to the central axis of the connecting pipe, or all described open Mouth is set relative to the central axis counterclockwise rotates of the connecting pipe.

10. a kind of ultrasonic wave gas meter, it is characterised in that including described in ultrasonic wave module and claim 1-9 any one Ultrasonic wave pipe connecting structure, the ultrasonic wave module is arranged in the inner chamber, and the ultrasonic wave module passes through the company Adapter road is connected with the gas outlet of the gas meter shell.