Temperature sensing device for gas meter
By adopting a temperature sensing device with wire forming and protective frame fixed structure in the gas meter, the problems of high temperature damage and complex assembly are solved, and higher yields and lower manufacturing costs are achieved.
Patent Information
- Application Number
- CN202323437611.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-15
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2033-12-15
AI Technical Summary
The temperature sensors in existing gas meters are easily damaged during high-temperature injection molding, resulting in low yield, complex assembly process, high manufacturing cost, and difficult to disassemble.
The temperature sensing device is used for forming the wire in the insulating body. The temperature sensing unit is fixed through the protective frame. The temperature sensing unit is welded after forming the wire during the manufacturing process. The temperature sensing unit is fixed with glue to avoid high temperature damage. At the same time, the protective frame is used. Limit the glue position for easier subsequent disassembly.
It effectively reduces the damage rate of the temperature sensor, simplifies the assembly process, reduces manufacturing costs, and improves the stability and disassembly of the device.
Smart Images
Figure CN222279853U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of gas flow measurement, in particular to a temperature sensor device for a gas meter. Background Art
[0002] Because the density of gas changes with temperature, traditional gas metering uses a single standard to measure the volume of gas flowing through, which will cause problems such as inconsistency with the actual gas used due to temperature differences.
[0003] Therefore, a smart gas meter using temperature compensation is widely used. This gas meter requires a temperature sensor to detect the ambient temperature in real time, and adjust the measurement standard in real time according to the ambient temperature in order to obtain the most accurate gas usage. Therefore, it is necessary to set at least one temperature sensor in the environment outside the gas meter or in the gas pipeline, and the temperature sensor also needs to be connected to the gas meter. Existing temperature sensors for gas meters are usually waterproofed by glue filling after assembly, which has complex processes, high manufacturing costs, and is not easy to disassemble. In order to solve the above problems, the applicant applied for patent No. CN107525555A on September 25, 2017, which solves the above technical problems by integrating the temperature sensor into the insulating body.
[0004] However, in the manufacturing process, it is difficult to accurately control the temperature of liquid plastic, and there are differences in the temperature tolerance of temperature sensors, which causes some temperature sensors to be damaged due to high temperature during the one-piece injection molding process, resulting in low yield. In view of this, it is necessary to propose a method to reduce the yield to reduce manufacturing costs. Utility Model Content
[0005] In view of this, it is necessary to provide a temperature sensing device for a gas meter that reduces the risk of damage to the temperature sensing unit due to temperature during manufacturing.
[0006] In order to solve the above technical problems, the present application provides a temperature sensing device for a gas meter, comprising a plurality of wires, an insulating body that forms the wires into one body, a temperature sensing unit placed at one end of the insulating body, a protective frame surrounding the temperature sensing unit, and glue injected into the protective frame to fix the temperature sensing unit and the protective frame to the insulating body, the two ends of the wires respectively pass through the two ends of the insulating body, and some of the wires are electrically connected to the temperature sensing unit.
[0007] Preferably, the wire includes a first wire connected to the temperature sensing unit and a second wire with both ends passing through the insulating body respectively, the first wire transmits a temperature signal to the gas meter, and the second wire transmits power to the gas meter.
[0008] Preferably, the insulating body includes a head, an extension portion extending downward from the head, an extension wrapping portion protruding from the bottom of the extension portion, and a mounting protrusion protruding upward from a portion of the top surface of the head, and the temperature sensing unit is placed on the mounting protrusion.
[0009] Preferably, the mounting protrusion includes a first boss protruding upward from the top surface of the head and a second boss protruding upward from a part of the first boss, the first boss is located at the inner side of the second boss to form a connection space, the wire passes through the first boss at the location of the connection space, and the second boss is radially provided with a through groove connected to the connection space and a snap edge formed outside at least part of the periphery of the second boss.
[0010] Preferably, the temperature sensing unit includes a circuit board, a temperature sensor mounted on the circuit board and a soldering portion arranged on the inner side of the circuit board. The circuit board is provided with a wire passing notch on one side of the soldering portion, part of the wires are soldered to the soldering portion through the wiring space, and part of the wires pass through the wiring space and then pass upward through the wire passing notch.
[0011] Preferably, the protection frame includes a frame body and a accommodating cavity formed in the frame body, the inner wall surface of the frame body protrudes inward to form a card block, the protection frame is pressed downward into the outer periphery of the first boss, and the card block is buckled and fixed on the buckle edge of the second boss.
[0012] Preferably, after the temperature sensing unit is placed on the second boss, glue is injected into the protective frame, the glue fills the connection space, the through groove and at least covers the circuit board, the temperature sensor is at least partially exposed outside the glue, and the through groove is a dovetail groove.
[0013] Preferably, the protection frame further comprises a covering sheet extending upward from the bottom of the frame body and then extending toward the accommodating cavity, the temperature sensor is located below the covering sheet, and the covering sheet can prevent dust and protect the temperature sensor.
[0014] Preferably, the wires are arranged in a row and integrally formed in the insulating body, the outer diameter of the extension portion is smaller than the outer diameter of the head portion, the outer periphery of the extension portion is provided with threads, and the lower free end of the wire is wrapped by the extension wrapping portion.
[0015] Preferably, a waterproof ring is provided at the junction of the head and the extension portion of the insulating body. When the temperature sensor device is screwed into the gas meter, the head and the gas meter clamp the waterproof ring to achieve waterproofing.
[0016] The temperature sensing device for a gas meter of the present application first integrally injection-moldes a number of wires, and then welds the temperature sensing unit, thereby avoiding damage to the temperature sensor due to high-temperature injection molding. At the same time, a protective frame is provided to surround the temperature sensing unit, which not only protects the temperature sensor, but also facilitates limiting the position of glue during subsequent glue injection. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.
[0018] Figure 1 A three-dimensional assembly diagram of a temperature sensor device for a gas meter in this application;
[0019] Figure 2 This is a three-dimensional exploded view of the temperature sensor device for the gas meter of this application;
[0020] Figure 3 A three-dimensional exploded view of the temperature sensor device for a gas meter of the present application from another angle;
[0021] Figure 4 This is a cross-sectional view of the temperature sensor device for the gas meter of the present application along the axes of several cables.
[0022] Description of Reference Numerals
[0023] Insulating body-10; head-11; extension part-12; waterproof ring-13; extension wrapping part-14; mounting protrusion-15; first boss-151; second boss-152; through groove-153; buckle edge-154; connection space-155; sensor unit-20; circuit board-21; wire notch-211; temperature sensor-22; electronic component-23; welding part-24; first wire-30; second wire-40; protection frame-50; frame body-51; accommodating cavity-52; cover sheet-53; observation hole-54; block-55. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.
[0025] See also Figure 1As shown, the temperature sensing device for a gas meter of the present application includes a first wire 30, a second wire 40, an insulating body 10 integrally forming the first wire 30 and the second wire 40, and a temperature sensing unit 20 fixed to the insulating body 10 through a protective frame 50. The first wire 30 is electrically connected to the temperature sensing unit 20. The first wire 30 and the second wire 40 can be collectively referred to as wires.
[0026] Please continue reading Figures 2 to 4 As shown, the insulating body 10 includes a head 11, an extension portion 12 extending downward from the head 11, an extension wrapping portion 14 protruding from the bottom of the extension portion 12, and a mounting protrusion 15 protruding upward from a portion of the top surface of the head 11. The outer diameter of the extension portion 12 is smaller than the outer diameter of the head 11. The extension portion 12 is cylindrical, and a thread is provided on the outer circumference for screwing with the thread at the corresponding position of the gas meter. The head 11 is a polygonal structure, and the overall shape of the insulating body 10 is a screw shape. A waterproof ring 13 is provided at the junction of the extension portion 12 and the head 11, or a waterproof ring groove structure is provided at the junction of the extension portion 12 and the head 11 for accommodating the waterproof ring 13. When the insulating body 10 is screwed on the gas meter, the waterproof ring 13 is clamped on the outer edge of the screw hole corresponding to the head 11 and the gas meter to achieve a waterproof function.
[0027] The mounting protrusion 15 includes a first boss 151 protruding upward from the surface of the head 11 and a second boss 152 protruding upward from one side of the first boss 151. The thickness of the first boss 151 is less than that of the second boss 152, and the first boss 151 is hollowed out at the middle to form a connection space 155. The second boss 152 is formed with a through groove 153 in the width direction to pass through the connection space 155. The through groove 153 can be a square groove, a dovetail groove or an irregular groove, etc. At least part of the edge of the second boss 152 protrudes outward to form a buckle edge 154.
[0028] The temperature sensing unit 20 includes a circuit board 21, a temperature sensor 22 mounted on the circuit board 21, an electronic component 23, and a soldering portion 24 provided on one side of the circuit board 21. The circuit board 21 is attached to the second boss 152, one side of the soldering portion 24 is suspended above the wiring space 155, and the circuit board 21 is cut out on one side of the soldering portion 24 to form a wire-passing notch 211, and the wire-passing notch 211 is also located above the wiring space 155. The soldering portion 24 is a structure of a plurality of solder holes for inserting the core wires of the cable for soldering.
[0029] The protection frame 50 includes a frame body 51 surrounding the mounting protrusion 15, a receiving cavity 52 formed in the frame body 51, and a cover sheet 53 extending upward from the top of the outer side of the frame body 51 and then extending toward the receiving cavity 52. The cover sheet 53 is provided with an observation hole 54, and a plurality of clamping blocks 55 are provided on the inner wall surface of the frame body 51, and the clamping blocks 55 are buckled on the buckling edge 154 of the outer edge of the second boss 152.
[0030] The first wire 30 is a signal wire, including four wires arranged in a row, and the second wire 40 is a power wire, including two wires arranged in a row. The first wire 30 and the second wire 40 are arranged in a row and then integrally injection molded in the insulating body 10. At the lower end, the first wire 30 and the second wire 40 pass through the extended wrapping portion 14 to increase the flexibility of the free ends of the first wire 30 and the second wire 40. At the upper end, the first wire 30 and the second wire 40 pass through the connection space 155 of the first boss 151 of the insulating body 10.
[0031] In the present application, a wire is used to replace the traditional solution of using a flexible flat cable, which can reduce material costs. The first wire 30 is connected to the temperature sensing unit to transmit the temperature signal to the gas meter. The second wire 40 transmits the external power supply to the gas meter.
[0032] During the manufacturing process, the first wire 30 and the second wire 40 are first fixed in a predetermined position and then subjected to in-mold injection molding to form the insulating body 10. The temperature sensing unit 20 is then placed on the second boss 152. During this process, a small amount of glue can be used to pre-fix the temperature sensing unit 20 on the second boss 152. Before the glue is pre-fixed, the core wire of the first wire 30 needs to be passed through the welding hole of the welding portion 24 of the circuit board 21 for welding and fixing; and the second wire 40 passes through the first boss 151 and the wire notch 211 and extends to the outside. Subsequently, the protective frame 50 is inserted from top to bottom into the outside of the mounting protrusion 15. Specifically, the bottom of the frame body 51 surrounds the outer edge of the first boss 151 and is flush with the surface of the head 11, and the clamping block 55 is clamped into the buckle edge 154 of the outer edge of the second boss 152 for fixing. Finally, glue is injected into the accommodating cavity 52 of the protection frame 50 to fix the temperature sensor unit 20 and the protection frame 50 on the insulating body 10. The temperature sensor 22 is at least partially exposed outside the glue. The glue fills all gaps such as the connection space 155, the through groove 153, and the lower side of the buckle edge 154 to fix the protection frame 50 and the temperature sensor unit 20 and maintain good stability. The temperature sensor 22 is located under the cover sheet 53 and is protected by the cover sheet to avoid being squeezed by external force, and the observation hole 54 can observe the state of the temperature sensor 22 thereunder.
[0033] The signal line 30 and the power line 40 are both provided with Teflon bushings to enhance their high temperature resistance.
[0034] The temperature sensing device for a gas meter of the present application first integrally injection-moldes the first wire 30 and the second wire 40, and then welds the temperature sensing unit 20, thereby avoiding damage to the temperature sensor 22 due to high-temperature injection molding. At the same time, a protective frame 50 is provided to surround the temperature sensing unit 20, which not only protects the temperature sensor 22, but also facilitates limiting the position of glue during subsequent glue injection.
[0035] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.
[0036] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims
1. A temperature sensing device for a gas meter, characterized in that: The invention comprises a plurality of conducting wires, an insulating body integrally formed with the conducting wires, a temperature sensing unit arranged at one end of the insulating body, a protective frame surrounding the temperature sensing unit, and glue injected into the protective frame to fix the temperature sensing unit and the protective frame to the insulating body. The two ends of the conducting wires respectively pass through the two ends of the insulating body, and part of the conducting wires are electrically connected to the temperature sensing unit.
2. The temperature sensor device for a gas meter according to claim 1, characterized in that: The wire includes a first wire connected to the temperature sensing unit and a second wire with two ends respectively passing through the insulating body. The first wire transmits a temperature signal to the gas meter, and the second wire transmits power to the gas meter.
3. The temperature sensor device for a gas meter according to any one of claims 1 or 2, characterized in that: The insulating body includes a head, an extension portion extending downward from the head, an extension wrapping portion protruding from the bottom of the extension portion, and a mounting protrusion protruding upward from a portion of the top surface of the head, and the temperature sensing unit is placed on the mounting protrusion.
4. The temperature sensor device for a gas meter according to claim 3, characterized in that: The mounting protrusion includes a first boss protruding upward from the top surface of the head and a second boss protruding upward from a part of the first boss. The first boss is located at the inner side of the second boss to form a connection space. The wire passes through the first boss at the location of the connection space. The second boss is radially provided with a through groove connected to the connection space and a snap edge formed outside at least part of the periphery of the second boss.
5. The temperature sensor device for a gas meter according to claim 4, characterized in that: The temperature sensing unit includes a circuit board, a temperature sensor mounted on the circuit board, and a soldering portion arranged on the inner side of the circuit board. The circuit board is provided with a wire passing notch on one side of the soldering portion, part of the wires are soldered to the soldering portion through the wiring space, and part of the wires pass through the wiring space and then pass upward out of the wire passing notch.
6. The temperature sensor device for a gas meter according to claim 5, characterized in that: The protection frame includes a frame body and a receiving cavity formed in the frame body. A clamping block is formed on the inner wall surface of the frame body and is pressed downward into the outer periphery of the first boss. The clamping block is buckled and fixed on the buckle edge of the second boss.
7. The temperature sensor device for a gas meter according to claim 6, characterized in that: After the temperature sensing unit is placed on the second boss, glue is injected into the protective frame, the glue fills the connection space, the through groove and at least covers the circuit board, the temperature sensor is at least partially exposed outside the glue, and the through groove is a dovetail groove.
8. The temperature sensor device for a gas meter according to claim 7, characterized in that: The protection frame further includes a cover sheet extending upward from the bottom of the frame body and then extending toward the accommodating cavity. The temperature sensor is located below the cover sheet, and the cover sheet can prevent dust and protect the temperature sensor.
9. The temperature sensor device for a gas meter according to claim 3, characterized in that: The wires are arranged in a row and integrally formed in the insulating body. The outer diameter of the extension portion is smaller than the outer diameter of the head portion. The outer periphery of the extension portion is provided with threads. The lower free end of the wire is wrapped by the extension wrapping portion.
10. The temperature sensor device for a gas meter according to claim 9, characterized in that: A waterproof ring is provided at the junction of the head and the extension of the insulating body. When the temperature sensor device is screwed into the gas meter, the head and the gas meter clamp the waterproof ring to achieve waterproofing.