CN213455708U

CN213455708U - Electrical connection sealing element for gas meter

Info

Publication number: CN213455708U
Application number: CN202022942248.3U
Authority: CN
Inventors: 龙宁; 梁飞; 沈畅
Original assignee: Sichuan Shipino Measurement Technology Co ltd
Current assignee: Sichuan Shipino Measurement Technology Co ltd
Priority date: 2020-12-10
Filing date: 2020-12-10
Publication date: 2021-06-15
Anticipated expiration: 2030-12-10

Abstract

The utility model discloses an electrical connection sealing element for a gas meter, belonging to the field of gas meters and comprising a plastic bolt and a circuit board fixed in the plastic bolt; the circuit board axially penetrates through two ends of the plastic bolt; and 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. Through fixing this sealing member in the gas measurement room and realizing sealed and the cable is drawn out, the gas measurement room that adopts this sealing member can have long-term stable gas seal nature, simple process, dismantle convenient, low cost, have long-term stable gas seal nature, convenient dismantlement and modularization test.

Description

Electrical connection sealing element for gas meter

Technical Field

The utility model belongs to the gas table field, concretely relates to gas table electrical connection sealing member.

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.

At present, common through holes are directly formed in a gas metering chamber (bin), a cable penetrating out of the gas metering chamber (bin) is directly filled with glue for sealing, and manual welding wires are adopted at two ends (inside and outside) of the cable. 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.

SUMMERY OF THE UTILITY MODEL

The gas meter electrical connection sealing piece is provided for leading out of a cable and sealing a connection part, and aims to solve the problems that a product cannot give consideration to high production efficiency, simple process, low cost, high stable gas tightness, convenient disassembly and modularized testing due to the fact that a cable leading-out mode of a gas metering chamber of an existing ultrasonic gas meter is not enough.

For realizing the purpose of the utility model, the technical proposal adopted is that: a gas meter electrical connection sealing element comprises a plastic bolt and a circuit board fixed in the plastic bolt; the circuit board axially penetrates through two ends of the plastic bolt; and 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.

As a further alternative, the circuit board and the plastic bolt are integrally injection molded.

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 outer surface of the threaded section of the plastic bolt has an axially disposed tangential plane.

As a further alternative, the nut of the plastic bolt is non-cylindrical.

As a further alternative, the plastic bolt is sleeved with a sealing ring.

As a further alternative, the plastic bolt is threadedly fitted with a plastic nut.

As a further alternative, the pads at both ends of the circuit board are soldered with connectors.

As a further alternative, the circuit board is a rigid printed circuit board.

The utility model has the advantages that: through fixing this sealing member in the gas metering room and realizing sealed and the cable is drawn forth, the plastics bolt after circuit board and injection moulding all have high density and certain hardness, so the gas metering room that adopts this sealing member can have long-term stable gas seal nature. The production process of the sealing element is free of manual operation, the plastic bolt is high in reliability, good in consistency, high in production efficiency and low in production cost, and the sealing element is particularly suitable for application environments with high requirements on mass production and gas tightness. The sealing element is easy to disassemble, and a gas metering chamber can be used as a standard testing component to sequentially test parameter indexes of 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 method has the advantages of simple process, convenience in disassembly, low cost, long-term stability of gas tightness, convenience in disassembly, modularization test and the like.

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 an electrical connection sealing member for a gas meter provided by an embodiment of the present invention;

fig. 3 is an installation schematic diagram of the electrical connection sealing member of the gas meter provided by the embodiment of the present invention;

fig. 4 is a schematic structural diagram of a circuit board in the electrical connection sealing member for a gas meter provided by the embodiment of the present invention;

fig. 5 is a schematic diagram of electrical connection of a circuit board in the electrical connection sealing member for a gas meter provided by the 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 and 7-nut.

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 5 show the electrical connection sealing element for a gas meter provided by the present invention, which comprises a plastic bolt and a circuit board fixed in the plastic bolt; the circuit board axially penetrates through two ends of the plastic bolt; and 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 welding pads at the two ends of the circuit board are conducted on the electrical performance, the plastic bolts are screwed to the gas metering chamber, and all 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 through cables respectively, so that the connection between the gas metering chamber and the gas meter display control chamber is realized, and meanwhile, the sealing of the gas metering chamber is also realized.

The circuit board and the plastic bolt can be integrally formed by injection molding, and the automatic injection molding machine is used for completing the process, so that the reliability is high, the consistency is good, the production efficiency is high, and the batch production is suitable. The circuit board is a rigid printed circuit board. In order to connect conveniently, the welding pads at the two ends of the circuit board can be welded with connectors, and the socket and the plug of the connectors can be connected and disconnected quickly, so that the circuit board is simple and quick.

The edge of the circuit board in the axial direction of the plastic bolt is concave-convex, as shown in fig. 4, so that the linear edge is avoided, and the circuit board can be prevented from sliding in the axial direction in the plastic bolt part. In order to prevent the plastic bolt from rotating in the use process after installation, the outer surface of the threaded section of the plastic bolt is provided with a cutting plane arranged along the axial direction, see fig. 3, namely, a plane is cut on the circular screw rod to form a non-circular screw rod. The nut of the plastic bolt is non-cylindrical, such as a hexagon bolt, so that the plastic bolt is prevented from sliding when being tightened.

In order to increase the air tightness, a sealing ring is sleeved on the plastic bolt, and a rubber ring is adopted. The plastic bolt is provided with a plastic nut in a threaded fit mode, the plastic nut is used for being fixedly installed by being matched with the plastic bolt, and the plastic nut is arranged to be non-circular, such as a hexagon nut, in order to prevent the plastic bolt from sliding when being screwed down.

The electrical connection of the circuit board can be schematically shown in fig. 5, the circuit board has a pad 3 at one end, and is P1, P2, …, Pn, and the socket J1 of the connector can be soldered on P1, P2, …, Pn; the other end of the circuit board 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

1. A gas meter electrical connection sealing element is characterized by comprising a plastic bolt and a circuit board fixed in the plastic bolt; the circuit board axially penetrates through two ends of the plastic bolt; and 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.

2. The electrical connection sealing member for a gas meter according to claim 1, wherein the circuit board and the plastic bolt are integrally injection-molded.

3. The gas meter electrical connection seal of claim 1, wherein the edge of the circuit board in the axial direction of the plastic bolt is concave-convex.

4. The gas meter electrical connection seal of claim 1, wherein the outer surface of the threaded section of the plastic bolt has an axially disposed tangential plane.

5. The gas meter electrical connection seal of claim 1, wherein the nut of the plastic bolt is non-cylindrical.

6. The gas meter electrical connection sealing member of claim 1, wherein a sealing ring is sleeved on the plastic bolt.

7. The gas meter electrical connection seal of claim 1, wherein a plastic nut is threadedly engaged on the plastic bolt.

8. The electrical connection sealing member for a gas meter according to claim 1, wherein connectors are welded to the pads at both ends of the circuit board.

9. The gas meter electrical connection seal of claim 1, wherein the circuit board is a rigid printed circuit board.