CN213455654U - Ultrasonic gas meter - Google Patents
Ultrasonic gas meter Download PDFInfo
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- CN213455654U CN213455654U CN202022937201.8U CN202022937201U CN213455654U CN 213455654 U CN213455654 U CN 213455654U CN 202022937201 U CN202022937201 U CN 202022937201U CN 213455654 U CN213455654 U CN 213455654U
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Abstract
The utility model discloses an ultrasonic gas meter, which belongs to the field of gas meters and comprises a gas metering chamber, wherein an electronic device is arranged inside the gas metering chamber, and a control module is arranged outside the gas metering chamber; the fuel gas metering chamber is characterized in that a through hole is formed in the fuel gas metering chamber, and the through hole is detachably connected with an electrical connection sealing element for plugging the through hole; the electric connection sealing element comprises a plastic bolt axially penetrating through the through hole and a circuit board fixed in the plastic bolt, and the circuit board axially penetrates through two ends of the plastic bolt; the two ends of the circuit board are respectively provided with a welding disc positioned outside the plastic bolt, and the welding discs at the two ends are electrically connected; the electronic device and the control module are electrically connected to two ends of the circuit board respectively. The gas metering chamber has the advantages that sealing and cable leading-out are realized through the plastic bolts and the circuit board which are fixed on the gas metering chamber, the process is simple, the disassembly is convenient, the cost is low, the gas metering chamber can have long-term stable gas tightness, and the disassembly and the modularization test are convenient.
Description
Technical Field
The utility model belongs to the gas table field, concretely relates to supersound gas table.
Background
In recent years, the engineering construction of 'changing coal into gas' is accelerated and promoted in China, and natural gas becomes one of main energy sources of modern clean energy systems in China. At present, the proportion of natural gas in primary energy consumption structures is about 10%, and the proportion is expected to increase to about 15% by 2030. The membrane type gas meter has the advantages of mature technology, stable quality, low price and the like, and currently occupies a leading position in the gas metering industry. The diaphragm gas meter has low measurement precision due to the fact that the diaphragm gas meter is complex in structure, easy to wear, and easy to be influenced by objective factors such as temperature and pressure of a pipeline medium.
The ultrasonic gas meter is an electronic meter for measuring gas flow by adopting ultrasonic signals, and compared with a film gas meter, the ultrasonic gas meter has the excellent performance characteristics of no movable part, no abrasion, no maintenance, wide range, no influence of sediments or moisture, no influence of changes of molecular weight and gas components, no zero drift of indication value, capability of realizing bidirectional flow measurement, capability of measuring low flow rate, capability of being used for gas leakage detection of a pipe network and the like.
An ultrasonic gas meter generally consists of two parts: a gas metering chamber (bin) and a gas meter display control chamber (bin), which are shown in figure 1. The signal (or data) lines of electronic components such as an ultrasonic metering module, an ultrasonic sensor, a temperature sensor, a pressure sensor, a motor valve and the like in the gas metering chamber (bin) need to be connected to a control module in a gas meter display control chamber (bin), and the gas metering chamber (bin) is required to have gas tightness. Therefore, how to lead out an internal signal (or data) line under the condition of ensuring that a gas metering chamber (bin) has gas tightness is a key technology and a core process of the whole ultrasonic gas meter manufacturing scheme, and the quality of the process directly determines the production assembly complexity, the production cost, the gas tightness and the long-term reliability of the ultrasonic gas meter.
The cable leading-out and sealing modes of the existing ultrasonic gas meter are as follows:
(1) a common through hole is directly formed in the gas metering chamber, a cable penetrating out of the gas metering chamber is directly sealed by glue pouring, and two ends (inside and outside) of the cable are manually welded. The process is purely manually operated, extra production equipment is not needed, the production process is complex, the process is suitable for small-batch production, the disassembly, the modular test and the mass production are inconvenient, and the gas meter is easy to be subjected to degumming after long-term work and causes the reduction of the gas tightness, so that the service life of the gas meter is shortened.
(2) A patent publication is CN 207907987U's ultrasonic wave gas table line bolt, should cross the line bolt and adopt metal bolt, installs a kind of shore hardness 45's rubber threading post threading in the bolt and seals. The wire passing bolt has the advantages of firm and reliable structure and long service life, but the welding wires at two ends (inside and outside) of a cable still need to adopt manual welding wires, so that the metal bolt is high in cost, and is inconvenient to disassemble and modularly test after welding wires.
(3) Compared with the method in the step (1), the method that the rubber FPC wire is used as the outgoing wire is adopted in the ultrasonic gas meter, the problem of manual wire welding is solved, the welding reject ratio is reduced, and the production efficiency of the ultrasonic gas meter is improved.
In conclusion, the existing cable leading-out method of the gas metering chamber cannot simultaneously meet the use requirements of simple process, low cost, long-term stable gas tightness, convenient disassembly and modular test of the lead connector of the gas metering chamber.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an ultrasonic gas meter, simple process, dismantle convenient, low cost, the gaseous seal of long-term stability, convenient dismantlement and modularization test to solve current ultrasonic gas meter and lead to the product can not compromise high production efficiency, simple process, low cost, the gaseous seal of high stability, the convenient problem of dismantling and modularization test because of the not enough of the cable extraction mode of gas measurement room.
For realizing the purpose of the utility model, the technical proposal adopted is that: an ultrasonic gas meter comprises a gas metering chamber, wherein an electronic device is arranged inside the gas metering chamber, and a control module is arranged outside the gas metering chamber; the gas metering chamber is provided with a through hole, and the through hole is detachably connected with an electrical connection sealing element for plugging the through hole; the electric connection sealing element comprises a plastic bolt axially penetrating through the through hole and a circuit board fixed in the plastic bolt, and the circuit board axially penetrates through two ends of the plastic bolt; the two ends of the circuit board are respectively provided with a welding disc positioned outside the plastic bolt, and the welding discs at the two ends are electrically connected; the electronic device and the control module are electrically connected to two ends of the circuit board respectively.
As a further alternative, the plastic bolt thread section penetrates the interior of the gas metering chamber through a through hole and is screw-fitted with a plastic nut.
As a further alternative, a sealing ring is sleeved on the plastic bolt and is positioned between the outer surface of the gas metering chamber and a nut of the plastic bolt.
As a further alternative, the outer surface of the thread section of the plastic bolt is provided with a tangent plane arranged along the axial direction, so that the cross section of the thread section is non-circular; the cross section of the through hole is the same as that of the threaded section of the plastic bolt.
As a further alternative, the edge of the circuit board in the axial direction of the plastic bolt is concave-convex.
As a further alternative, the pads at both ends of the circuit board are soldered with connectors.
The utility model has the advantages that:
1. the sealing element is fixed in the gas metering chamber to realize sealing and cable leading-out, and the circuit board and the injection molded plastic bolt have high density and certain hardness, so the gas metering chamber adopting the sealing element can have long-term stable gas tightness.
2. The injection molding of the circuit board and the plastic bolt is completed by an automatic injection molding machine, the whole production process has no manual operation, and the plastic bolt has high reliability, good consistency, high production efficiency and low production cost, and is particularly suitable for application environments with high requirements on mass production and gas tightness.
3. The gas metering chamber after the plastic bolt is installed is easy to disassemble, one gas metering chamber can be used as a standard testing part, and parameter index testing is sequentially carried out on the display control chambers of the gas meters in batches. Similarly, a gas meter display control room can be used as a standard test component to sequentially carry out parameter index test on the gas metering rooms in batches. The process is simple, the disassembly is convenient, the cost is low, the gas tightness is stable for a long time, and the disassembly and the modular test are convenient.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings required for the description of the embodiments will be briefly introduced below, it should be understood that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a conventional ultrasonic gas meter;
fig. 2 is a schematic structural diagram of a sealing member in an ultrasonic gas meter provided by an embodiment of the present invention;
fig. 3 is a schematic diagram of electrical connection of the ultrasonic gas meter provided by the embodiment of the present invention;
fig. 4 is an installation schematic diagram of an electrical connection sealing member of an ultrasonic gas meter provided by an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a circuit board in an electrical connection sealing member of an ultrasonic gas meter provided by an embodiment of the present invention;
fig. 6 is a schematic diagram of electrical connection of a circuit board in an electrical connection sealing member of an ultrasonic gas meter provided by an embodiment of the present invention;
reference numerals: 1-plastic bolt, 2-circuit board, 3-welding plate, 4-cutting plane, 5-sealing ring, 6-plastic nut, 7-nut and 8-through hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention. It is to be understood that the drawings are designed solely for the purposes of illustration and description and not as a definition of the limits of the invention. The connection relationships shown in the drawings are for clarity of description only and do not limit the manner of connection.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. 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 invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
Fig. 2 to 6 show an ultrasonic gas meter provided by the present invention, which includes a gas metering chamber, an electronic device is disposed inside the gas metering chamber, and a control module is disposed outside the gas metering chamber; the gas metering chamber is provided with a through hole 8, and the through hole 8 is detachably connected with an electrical connection sealing element for plugging the through hole; the electric connection sealing element comprises a plastic bolt 1 axially penetrating through the through hole 8 and a circuit board 2 fixed in the plastic bolt 1, wherein the circuit board 2 axially penetrates through two ends of the plastic bolt 1; two ends of the circuit board 2 are respectively provided with a welding disc 3 positioned outside the plastic bolt 1, and the welding discs 3 at the two ends are electrically connected; the electronic device and the control module are electrically connected to both ends of the circuit board 2, respectively.
The pads 3 at the two ends of the circuit board 2 are conducted on the electrical performance, the plastic bolts 1 are screwed on the gas metering chamber, and all electronic devices in the gas metering chamber and the control module of the gas meter display control chamber are connected to the two ends of the circuit board 2 through cables respectively, so that the gas metering chamber is sealed while the connection between the gas metering chamber and the gas meter display control chamber is realized.
The thread section of the plastic bolt 1 penetrates into the gas metering chamber through the through hole 8, and is matched with the plastic nut 6 through threads to install and fix the plastic bolt 1. In order to prevent the plastic bolt 1 from sliding when being screwed down, the plastic nut 6 is non-circular, such as a hexagon nut, so that the plastic bolt is convenient to clamp and prevent rotation. Can overlap on the plastic bolt 1 and be equipped with sealing washer 5, increase the gas tightness, sealing washer 5 is located between the outer surface of gas measurement room and the nut 7 of plastic bolt 1, makes in close contact with, strengthens sealed effect.
In order to prevent the plastic bolt 1 from rotating in the use process after installation, the outer surface of the threaded section of the plastic bolt 1 is provided with a tangent plane 4 arranged along the axial direction, so that the cross section of the threaded section is non-circular, and correspondingly, the cross section of the through hole 8 is the same as that of the threaded section of the plastic bolt 1 and is also non-circular. The nut 7 of the plastic bolt 1 may be non-cylindrical, such as a hex bolt, to prevent the plastic bolt 1 from slipping easily when tightened.
The edge of the circuit board 2 in the axial direction of the plastic bolt 1 is concave-convex, see fig. 5, so that the linear edge is avoided, and the circuit board 2 can be prevented from sliding in the axial direction in the plastic bolt 1.
The circuit board 2 and the plastic bolt 1 can be integrally formed by injection molding and completed by an automatic injection molding machine, and the automatic injection molding machine has the advantages of high reliability, good consistency and high production efficiency, and is suitable for batch production. The circuit board 2 is a rigid printed circuit board. In order to connect conveniently, the welding pads 3 at the two ends of the circuit board 2 can be welded with connectors, and the socket and the plug of the connectors can be connected and disconnected quickly, so that the connection is simple and quick. After connector sockets J1 and J2 are mounted on the two-end bonding pads 3, the two-end bonding pads can be connected with a control module in a gas meter display control room through a plug K1; the plug K2 is electrically connected with the electronic devices (an ultrasonic metering module, an ultrasonic sensor, a temperature sensor, a pressure sensor, a motor valve and the like) in the gas metering chamber.
The electrical connection of the circuit board 2 can be schematically shown in fig. 6, where the circuit board 2 has pads 3 at one end, and P1, P2, …, Pn, and the sockets J1 of the connector can be soldered to P1, P2, …, Pn; the other end of the circuit board 2 is provided with a pad 3 which is respectively Q1, Q2, … and Qn, and a socket J2 of a connector can be welded on the Q1, the Q2, … and the Qn; p1 and Q1, P2 and Q2, …, Pn and Qn are electrically conductive. W1, W2, …, Wn are the conductors between P1 and Q1, P2 and Q2, …, Pn and Qn, respectively. After the sealing element is formed by injection molding, the sealing element is arranged on a gas metering chamber with a hole matched with the sealing element, so that the conduction of the inside and the outside of the gas metering chamber on the electrical performance is realized, and the gas tightness is stable for a long time.
The present invention is not limited to the above-mentioned optional embodiments, and any other products in various forms can be obtained by anyone under the teaching of the present invention, and any changes in the shape or structure thereof, all the technical solutions falling within the scope of the present invention, are within the protection scope of the present invention.
Claims (6)
1. An ultrasonic gas meter comprises a gas metering chamber, wherein an electronic device is arranged inside the gas metering chamber, and a control module is arranged outside the gas metering chamber; the fuel gas metering chamber is characterized in that a through hole is formed in the fuel gas metering chamber, and the through hole is detachably connected with an electrical connection sealing element for plugging the through hole; the electric connection sealing element comprises a plastic bolt axially penetrating through the through hole and a circuit board fixed in the plastic bolt, and the circuit board axially penetrates through two ends of the plastic bolt; the two ends of the circuit board are respectively provided with a welding disc positioned outside the plastic bolt, and the welding discs at the two ends are electrically connected; the electronic device and the control module are electrically connected to two ends of the circuit board respectively.
2. The ultrasonic gas meter according to claim 1, wherein the plastic bolt thread section penetrates into the gas metering chamber through the through hole, and is screw-fitted with a plastic nut.
3. The ultrasonic gas meter according to claim 1 or 2, wherein the plastic bolt is sleeved with a sealing ring, and the sealing ring is located between the outer surface of the gas meter chamber and a nut of the plastic bolt.
4. The ultrasonic gas meter according to claim 1, wherein the outer surface of the threaded section of the plastic bolt has a tangential plane arranged along the axial direction, so that the cross section of the threaded section is non-circular; the cross section of the through hole is the same as that of the threaded section of the plastic bolt.
5. The ultrasonic gas meter according to claim 1, wherein an edge of the circuit board in the axial direction of the plastic bolt is concave-convex.
6. The ultrasonic gas meter according to claim 1, wherein connectors are welded to the pads at both ends of the circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022937201.8U CN213455654U (en) | 2020-12-10 | 2020-12-10 | Ultrasonic gas meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022937201.8U CN213455654U (en) | 2020-12-10 | 2020-12-10 | Ultrasonic gas meter |
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| Publication Number | Publication Date |
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| CN213455654U true CN213455654U (en) | 2021-06-15 |
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| CN202022937201.8U Active CN213455654U (en) | 2020-12-10 | 2020-12-10 | Ultrasonic gas meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112345010A (en) * | 2020-12-10 | 2021-02-09 | 四川施派诺计量技术有限公司 | Ultrasonic gas meter and electrical connection sealing method |
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- 2020-12-10 CN CN202022937201.8U patent/CN213455654U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112345010A (en) * | 2020-12-10 | 2021-02-09 | 四川施派诺计量技术有限公司 | Ultrasonic gas meter and electrical connection sealing method |
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