Lead module for ultrasonic gas meter

Abstract

The utility model discloses a lead module for an ultrasonic gas meter. The lead module comprises an integrated wire, a base, an inner sleeve and an outer sleeve. A mounting through hole is formed in the base, and the hole wall of the mounting through hole is a conical surface of which the inner diameter is gradually increased from top to bottom; the outer sleeve comprises an embedded part and an exposed part, the embedded part is matched with the mounting through hole, a blind hole for embedding the inner sleeve is formed in the bottom of the embedded part, and the hole wall of the blind hole is a conical surface of which the inner diameter is gradually increased from top to bottom; the outer sleeve is provided with an axially-penetrating outer sleeve hole. The inner sleeve is in a frustum shape matched with the blind hole and is provided with an inner sleeve hole penetrating in the axial direction. The inner sleeve is embedded in the blind hole, the outer sleeve hole and the inner sleeve hole are communicated to form a lead hole, the integrated wire penetrates through the lead hole and is fixed to the inner sleeve, and the inner sleeve hole and the integrated wire are sealed. The whole module is simple in structure and convenient to assemble.

Description

Technical Field

[0001] This utility model relates to the technical field of gas meters, and in particular to a lead module for an ultrasonic gas meter. Background Technology

[0002] In modern gas metering systems, the gas meter, as the core device, integrates numerous precision components, including an ultrasonic measurement module, circuit board, and pressure sensor, for accurately measuring gas flow and monitoring related parameters. Simultaneously, the gas meter is equipped with an external display module to visually present information such as gas usage. To ensure the electrical connection between the internal and external modules and to guarantee the normal operation of the gas meter and data transmission, wires must run through the meter casing to connect the internal and external modules.

[0003] However, existing gas meter lead sealing technologies have some pressing issues. Currently, the common practice is to place a sealing gasket where the lead penetrates the meter casing to prevent gas leakage and ensure safe operation. Patent document CN209264042U discloses a rubber sealing gasket for the internal and external leads of a smart gas meter. The upper casing houses the meter connector, which is riveted to a fixed connecting plate to press against the connector's sealing ring. The upper and lower casings are then pressed together to install the rubber sealing gasket. The rubber sealing gasket has multiple evenly distributed through holes, rectangular slots, or rectangular grooves for threading. An FPC flexible circuit board passes through the rectangular slots, and the upper and lower casings are pressed together to seal. Alternatively, the FPC flexible circuit board can be placed in the rectangular grooves, coated with polyurethane sealant, and then pressed together to seal. One end of the FPC flexible circuit board is inside the meter, and the other end is outside. This patent achieves circuit sealing through the use of a rubber sealing gasket and polyurethane sealant. However, practice has shown that the contact between this separately installed sealing gasket and the lead wire is not tight, resulting in a poor sealing effect and failing to effectively eliminate the risk of gas leakage, thus posing a hidden danger to the safe operation of the gas meter.

[0004] In addition to the above, other lead modules exist in the prior art designed to achieve lead sealing. These include the following patent documents.

[0005] Patent document CN207263248U discloses a gas meter lead wire device, which includes a meter housing and a lead wire connected to the meter housing. The lead wire is composed of a horizontal part and a vertical part. The horizontal part of the lead wire is tubular and has a sealing body in the middle. The sealing body is sealed and fixed to the inner wall of the horizontal part of the lead wire. The sealing body is connected to a number of alloy pins, and the two ends of the alloy pins are exposed on the two end faces of the sealing body. The connection between the horizontal part and the vertical part of the lead wire is provided with a wedge-shaped mounting and fixing part.

[0006] Patent document CN105486370A provides a sealing structure for the wiring of a smart gas meter, including a meter housing with a through hole in the middle, an inner nut, a T-shaped connector, a conical sealing plug, a pressure cap, and a wiring. The T-shaped connector, with an internally formed axial conical hole, passes through the through hole of the meter housing. The T-shaped connector includes an upper platform and a lower platform. A conical sealing plug is inserted into the conical hole of the T-shaped connector, with the smaller end of the conical sealing plug facing the T-shaped connector. An eight-shaped groove with an opening facing the larger end of the conical sealing plug is provided at the smaller end of the conical sealing plug. A pressure cap is provided on the outer edge of the upper platform of the T-shaped connector, and a sealing ring is provided between the pressure cap and the conical sealing plug. The lower platform of the T-shaped connector passes through the inner nut. The wiring is positioned at the central axis of the sealing structure and passes through the pressure cap, the conical sealing plug, the T-shaped connector, and the inner nut. The smart gas meter wiring sealing structure of this invention has good sealing performance and is simple in structure and easy to assemble.

[0007] Patent document CN217542041U discloses a sealing structure for a smart gas meter wire, including an installation cylinder that runs through one side of the gas meter housing. A fixing ring is installed on the outer side of the installation cylinder near the gas meter housing, and a limiting groove is evenly opened at the end of the fixing ring away from the gas meter housing. A conical groove is opened at the end of the installation cylinder away from the gas meter housing.

[0008] Patent document CN216978020U discloses a connection structure for gas meter wires, including a connecting post, a pressure plate, and a sealing plug. The connecting post has a sealing hole, and the sealing plug has a through hole. The pressure plate has a wire-passing hole in the middle. The wire passes through the through hole and the wire-passing hole, and the side wall of the wire is pressed against the wall of the through hole. The sealing plug is placed in the sealing hole, and the outer side wall of the sealing plug is pressed against the side wall of the sealing hole of the connecting post. The two ends of the sealing plug are pressed against the first end of the sealing hole of the connecting post and the first side of the pressure plate, respectively. By pressing the pressure plate, the sealing plug is squeezed out from inside the connecting post. The sealing function of the connecting post is achieved through the radial sealing effect at the bottom outlet of the connecting post. The pressure plate always keeps pressing the sealing plug to ensure the sealing effect while preventing the sealing plug from falling out.

[0009] Patent document CN200950071Y discloses a wire connector device for a gas meter with an internal valve. The wire connector, with a tapered inner bore, has an external thread that mates with a nut. The bottom of a fastener with an inner bore contacts the top of a tapered plug. A step with a groove is provided in the middle of the wire connector. A perforated tapered plug is placed inside the wire connector. This invention ensures the airtightness of the connection between the valve wire and the connector, as well as the connection between the gas meter housing and the connector, making the gas meter more accurate and safer to use.

[0010] Patent document CN2716812Y discloses a gas meter wire sealing assembly, which has a wire running through the inside and outside of the meter housing. A connector with a stop and an axial conical hole is inserted into the through hole of the meter housing, with both ends located inside and outside the meter housing. A conical rubber plug with an axial through hole is inserted into the axial conical hole of the connector. A pressure pad with an axial through hole is abutted on the outer end face of the rubber plug. The wire passes through the connector, the rubber plug and the pressure pad in succession through the axial through hole and runs through the inside and outside of the meter housing. A fastening cap is screwed on one end of the connector corresponding to the pressure pad and is pressed against the pressure pad. A fastening nut is screwed on the other end of the connector. A sealing washer is fitted on the connector at the point where the stop and the meter housing are pressed together.

[0011] These comparative documents show that the lead structure of the existing technology is more complex. This complexity leads to higher manufacturing costs and also increases the difficulty of assembly and the possibility of failure. Utility Model Content

[0012] The technical problem to be solved by this utility model is to provide a lead module for an ultrasonic gas meter that is simple in structure and easy to install.

[0013] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a lead wire module for an ultrasonic gas meter, including an integrated wire, a base, an inner sleeve and an outer sleeve;

[0014] The base is provided with a mounting through hole, and the wall of the mounting through hole is a conical surface with an inner diameter that gradually increases from top to bottom;

[0015] The outer sleeve includes an inner part and an exposed part. The inner part matches the mounting through hole. The bottom of the inner part is provided with a blind hole for inserting the inner sleeve. The wall of the blind hole is a tapered surface with an inner diameter that gradually increases from top to bottom. The outer sleeve is provided with an axially penetrating outer sleeve hole.

[0016] The inner sleeve is a frustoconical shape that matches the blind hole, and the inner sleeve has an axially penetrating inner sleeve hole;

[0017] The inner sleeve is embedded in the blind hole, and the outer sleeve hole and the inner sleeve hole are connected to form a lead wire hole. The integrated wire passes through the lead wire hole, and the integrated wire is fixed to the inner sleeve. The inner sleeve hole and the integrated wire are sealed.

[0018] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is: the integrated line and the inner sleeve hole are fixed and sealed by soldering to form a welded part.

[0019] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the welding part includes a first welding part located inside the inner sleeve hole and a second welding part located at the lower edge of the inner sleeve hole.

[0020] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: it further includes a nut that matches the exposed part of the outer casing, and the outer periphery of the exposed part is provided with external threads.

[0021] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is: the base is also provided with a pressure sensor.

[0022] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the base is made of stainless steel, and the inner sleeve and outer sleeve are made of copper.

[0023] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the cross-section of the integrated line is rectangular, and the cross-section of the inner sleeve hole is rectangular with the cross-section of the integrated line.

[0024] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is: an ultrasonic gas meter lead module, including an integrated wire, a base, an inner sleeve, an outer sleeve, and a nut;

[0025] The base is provided with a mounting through hole, and the wall of the mounting through hole is a conical surface with an inner diameter that gradually increases from top to bottom;

[0026] The outer sleeve includes an inner part and an exposed part. The inner part matches the mounting through hole. The bottom of the inner part is provided with a blind hole. The wall of the blind hole is a conical surface with an inner diameter that gradually increases from top to bottom.

[0027] The outer sleeve has an axially penetrating outer sleeve hole; the exposed portion has external threads;

[0028] The inner sleeve is a frustoconical shape that matches the blind hole, and the inner sleeve has an axially penetrating inner sleeve hole;

[0029] After the integrated wire passes through the inner sleeve hole, the upper section of the integrated wire extends beyond the upper end of the inner sleeve; the integrated wire and the bottom surface of the inner sleeve are soldered and sealed together along the circumference of the inner sleeve hole to form a primary component;

[0030] The primary component is inserted into the outer sleeve from bottom to top, the upper section of the integrated wire passes through the hole in the outer sleeve and its upper end extends beyond the upper end of the outer sleeve; the inner sleeve is embedded in the blind hole of the outer sleeve, and the inner sleeve and the outer sleeve are pressed and sealed by the inclined surface to form a secondary component;

[0031] The secondary component is inserted into the mounting through hole from bottom to top, the exposed part protrudes above the base and is screwed on to connect with the nut, and the embedded part is located in the mounting through hole and is tightened and sealed by the inclined surface.

[0032] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the welding part between the integrated line and the inner sleeve includes a first welding part located inside the inner sleeve hole and a second welding part located at the lower edge of the inner sleeve hole.

[0033] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is: the base is also provided with a pressure sensor.

[0034] Compared with existing technologies, the advantages of this invention are: the integrated wire and the inner sleeve are sealed and fixed by ordinary sealing methods, such as the most common solder sealing. During installation, the integrated wire is not subjected to dragging force, thus preventing damage to the seal and ensuring this initial sealing effect. Furthermore, due to the conical fit between the outer and inner sleeves, and the conical fit between the inner part of the outer sleeve and the mounting through-hole of the base, multi-stage sealing is achieved for the entire lead module, ensuring sealing during the lead wire insertion process. The entire module structure is relatively simple and installation is convenient. Attached Figure Description

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0036] Figure 1 A three-dimensional structural diagram of a lead module for an ultrasonic gas meter;

[0037] Figure 2 A cross-sectional view of a lead module for an ultrasonic gas meter;

[0038] Figure 3 An exploded view of a lead module for an ultrasonic gas meter;

[0039] Figure 4 A schematic diagram of the outer casing of a lead module for an ultrasonic gas meter;

[0040] Figure 5 A cross-sectional view of the outer casing of a lead module for an ultrasonic gas meter;

[0041] Figure 6 This is a cross-sectional view of the base of a lead module for an ultrasonic gas meter.

[0042] Figure label:

[0043] Integrated wire 1; base 2; inner sleeve 3; outer sleeve 4; mounting through hole 20; embedded part 41; exposed part 42; blind hole 410; outer sleeve hole 401; inner sleeve hole 301; external thread 420; sensor mounting hole 21; first welding part 5; second welding part 6 Detailed Implementation

[0044] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0045] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it will not be further defined and explained in subsequent figures.

[0046] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", and "outer" indicate the orientation or positional relationship based on the usual orientation or positional relationship when the utility model product is used. There may be inconsistencies with the orientation in the accompanying drawings. They are only used to facilitate the description of this utility model based on the same reference and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0047] like Figure 1-4 As shown, this embodiment provides a lead wire module for an ultrasonic gas meter, including an integrated wire 1, a base 2, an inner sleeve 3, and an outer sleeve 4.

[0048] like Figure 1-2 As shown in Figure 6, the base 2 is the carrier that integrates all the components and is installed inside the ultrasonic gas meter. The base 2 has a through-hole 20 running vertically through the top and bottom. The wall of the through-hole 20 is a conical surface with an inner diameter that gradually increases from top to bottom.

[0049] like Figure 1-6 As shown, the outer sleeve 4 is disposed within the mounting through hole 20, and includes an embedded portion 41 and an exposed portion 42. The embedded portion 41 matches the mounting through hole 20 and is located within the through hole after assembly. The exposed portion 42 passes through the mounting through hole 20 and is exposed on the upper surface of the base 2, serving as the part for module installation through the gas meter housing. The bottom of the embedded portion 41 has a blind hole 410 for inserting the inner sleeve 3, and the wall of the blind hole 410 is a tapered surface with an inner diameter that gradually increases from top to bottom. The outer sleeve 4 has an axially penetrating outer sleeve hole 401 that extends to the blind hole 410.

[0050] The inner sleeve 3 is a frustoconical shape that matches the blind hole 410. The inner sleeve 3 has an axially penetrating inner sleeve hole 301. The inner sleeve 3 is embedded in the blind hole 410. The outer sleeve hole 401 and the inner sleeve hole 301 are connected to form a lead wire hole. The integrated wire 1 is inserted into the lead wire hole. The integrated wire 1 is fixed to the inner sleeve 3, and the inner sleeve hole 301 and the integrated wire 1 are sealed.

[0051] In the specific assembly, firstly, the integrated wire 1 passes through the inner sleeve hole 301, with the upper section of the integrated wire 1 extending beyond the upper end of the inner sleeve 3 and the lower section extending beyond the lower end of the inner sleeve 3. The integrated wire 1 and the inner sleeve 3 are sealed and fixed together to form a primary component. The preferred fixing method is to solder them together around the inner sleeve hole 301 for sealing. Then, the primary component is inserted into the outer sleeve 4 from bottom to top, with the upper section of the integrated wire 1 passing through the outer sleeve hole 401 and extending beyond the upper end of the outer sleeve 4. The inner sleeve 3 is embedded into the blind hole 410 of the outer sleeve 4, and the inner sleeve 3 and the outer sleeve 4 are pressed and sealed by the inclined surface to form a secondary component. Next, the secondary component is inserted into the mounting through hole 20 from bottom to top, with the exposed part 42 extending out from above the base 2 and through the gas meter housing to the outside of the housing. The exposed part 42 is pulled outward, and while being fixed to the housing, the embedded part 41 is located in the mounting through hole 20 and is tightened and sealed by the inclined surface. At this point, the upper end of integrated line 1 is located outside the meter for connecting the LCD display module of the meter head, and the lower end is located inside the meter for connecting the internal circuitry.

[0052] In this embodiment, the integrated wire 1 and the inner sleeve 3 are sealed and fixed by ordinary sealing methods, such as the most common solder seal. During installation, the integrated wire 1 is not subjected to dragging force, so the seal will not be damaged, ensuring this primary sealing effect. Due to the conical design of the outer sleeve 4 and the inner sleeve 3, when the inner sleeve 3 is pressed into the blind hole 410 of the outer sleeve 4, the two fit tightly together, forming a good sealing effect. When the exposed part 42 is pulled outward, the inner part 41 of the outer sleeve 4 is located in the mounting through hole 20 and is tightened and sealed by the inclined surface. The inner part 41 of the outer sleeve 4 fits tightly with the conical surface of the mounting through hole 20 of the base 2, further enhancing the sealing performance of the entire lead module. In this way, the sealing performance is ensured during the external threading of the lead. The entire module structure is relatively simple and the installation is relatively convenient.

[0053] like Figure 4-5 As shown, the exposed portion 42 has an external thread 420 on its outer periphery. The module also includes a matching nut. When it passes through the gas meter housing and reaches the outside of the housing, the nut located outside the housing is screwed onto the exposed portion 42, gradually pulling the outer jacket 4 outward, thereby tightening the inclined surface between the inner and outer jacket 4 and the base 2, thus achieving a seal while installing the module.

[0054] like Figure 1 , 6As shown in the preferred embodiment, a sensor mounting hole 21 is also provided on the base 2, in which a sealing detection device is installed. This device includes a pressure sensor. The pressure sensor is used to monitor the pressure inside the meter in real time. When an abnormal change occurs in the pressure, the signal is sent to the control unit of the gas meter. After receiving the signal, the control unit can take timely measures, such as closing the gas valve, to prevent gas leakage accidents. The addition of this sealing detection device greatly improves the safety and reliability of the lead module, providing a strong guarantee for the safe operation of the gas meter.

[0055] like Figure 2 As shown, in this embodiment, the integrated wire 1 and the inner sleeve hole 301 are fixed and sealed by soldering to form a welded part. The welded part includes a first welded part 5 located inside the inner sleeve hole 301 and a second welded part 6 located at the lower edge of the inner sleeve hole 301. This ensures a firm connection and seal between the integrated wire 1 and the inner sleeve 3.

[0056] As can be seen, this embodiment, through the conical design of the base 2, outer sleeve 4, and inner sleeve 3, and the method of soldering the sealing integrated wire 1 to the inner sleeve 3, forms a tight sealing structure in multiple parts of the entire lead module. Furthermore, the optimized sealing detection device further enhances the sealing performance. In practical use, even under conditions of fluctuating gas pressure or high ambient humidity, it can effectively prevent gas leakage, ensuring the safe operation of the gas meter and reducing the safety hazards caused by gas leaks.

[0057] like Figure 3 As shown, the cross-section of the integrated wire 1 in this embodiment is rectangular, and the cross-section of the inner sleeve hole 301 is also rectangular, matching the cross-section of the integrated wire 1. Compared to a circular wire harness, a rectangular wire is less prone to twisting after installation, thus better ensuring the strength of the welded seal.

[0058] In terms of material selection, the base 2 in this embodiment is made of stainless steel, while the inner sleeve 3 and outer sleeve 4 are made of copper. This ensures both structural strength and circuit conductivity.

[0059] The above describes a lead module for an ultrasonic gas meter provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments are only for the purpose of helping to understand this utility model and its core ideas. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A lead module for an ultrasonic gas meter, characterized in that: Includes integrated wiring, base, inner sleeve, and outer sleeve; The base is provided with a mounting through hole, and the wall of the mounting through hole is a conical surface with an inner diameter that gradually increases from top to bottom; The outer sleeve includes an inner part and an exposed part. The inner part matches the mounting through hole. The bottom of the inner part is provided with a blind hole for inserting the inner sleeve. The wall of the blind hole is a tapered surface with an inner diameter that gradually increases from top to bottom. The outer sleeve is provided with an axially penetrating outer sleeve hole. The inner sleeve is a frustoconical shape that matches the blind hole, and the inner sleeve has an axially penetrating inner sleeve hole; The inner sleeve is embedded in the blind hole, and the outer sleeve hole and the inner sleeve hole are connected to form a lead wire hole. The integrated wire passes through the lead wire hole, and the integrated wire is fixed to the inner sleeve. The inner sleeve hole and the integrated wire are sealed.

2. The lead module for an ultrasonic gas meter according to claim 1, characterized in that: The integrated line and the inner sleeve hole are fixed and sealed by soldering to form a welded part.

3. The lead module for an ultrasonic gas meter according to claim 2, characterized in that: The welding part includes a first welding part located inside the inner sleeve hole and a second welding part located at the lower edge of the inner sleeve hole.

4. The lead module for an ultrasonic gas meter according to claim 1, characterized in that: It also includes a nut that matches the exposed portion of the outer casing, the exposed portion having external threads on its outer periphery.

5. The lead module for an ultrasonic gas meter according to claim 1, characterized in that: The base is also equipped with a pressure sensor.

6. The lead module for an ultrasonic gas meter according to claim 1, characterized in that: The base is made of stainless steel, and the inner and outer sleeves are made of copper.

7. The lead module for an ultrasonic gas meter according to claim 1, characterized in that: The cross-section of the integrated wire is rectangular, and the cross-section of the inner sleeve hole is rectangular, similar to the cross-section of the integrated wire.

8. A lead module for an ultrasonic gas meter, characterized in that: Includes integrated wires, base, inner sleeve, outer sleeve, and nuts; The base is provided with a mounting through hole, the wall of which is a conical surface with an inner diameter that gradually increases from top to bottom; the outer sleeve includes an inner part and an exposed part, the inner part matches the mounting through hole, and the bottom of the inner part is provided with a blind hole, the wall of which is a conical surface with an inner diameter that gradually increases from top to bottom; The outer sleeve has an axially penetrating outer sleeve hole; the exposed portion has external threads; The inner sleeve is a frustoconical shape that matches the blind hole, and the inner sleeve has an axially penetrating inner sleeve hole; After the integrated wire passes through the inner sleeve hole, the upper section of the integrated wire extends beyond the upper end of the inner sleeve; the integrated wire and the bottom surface of the inner sleeve are soldered and sealed together along the circumference of the inner sleeve hole to form a primary component; The primary component is inserted into the outer sleeve from bottom to top, the upper section of the integrated wire passes through the hole in the outer sleeve and its upper end exceeds the upper end of the outer sleeve; the inner sleeve is embedded in the blind hole of the outer sleeve, and the inner sleeve and the outer sleeve are pressed and sealed by the inclined surface to form a secondary component; The secondary component is inserted into the mounting through hole from bottom to top, the exposed part protrudes above the base and is screwed on to connect with the nut, and the embedded part is located in the mounting through hole and is tightened and sealed by the inclined surface.

9. A lead module for an ultrasonic gas meter according to claim 8, characterized in that: The weld between the integrated line and the inner sleeve includes a first weld located inside the inner sleeve hole and a second weld located at the lower edge of the inner sleeve hole.

10. A lead module for an ultrasonic gas meter according to claim 8, characterized in that: The base is also equipped with a pressure sensor.

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