Screw connection structure for gas alarm connecting wire

Abstract

This utility model belongs to the field of gas equipment technology, specifically a screw-on connection structure for a gas alarm connection cable. It includes a housing and a connector. The housing has a mounting hole. The connector includes a first external thread portion adapted to the mounting hole and a limiting shoulder fixedly connected to the first external thread portion. A first limiting block is fixedly mounted on the end face of the limiting shoulder facing the first external thread portion. The housing has a snap-fit ​​groove, in which a second limiting block is fixedly mounted. The position of the second limiting block in the snap-fit ​​groove is adapted to the first limiting block, so that when the connector is screwed to the position where the limiting shoulder abuts against the housing, the first limiting block and the second limiting block abut against each other. This utility model reduces the installation materials for gas alarm connection cables, simplifies the installation structure and steps, and ensures the sealing performance of the gas alarm connection cable. It is suitable for connecting gas alarm connection cables to meter housings.

Description

Technical Field

[0001] This utility model belongs to the field of gas equipment technology, specifically a screw-type connection structure for a gas alarm connection wire. Background Technology

[0002] During the production process, the gas alarm connection wire of a gas meter with gas alarm function needs to be fixedly installed on the meter housing. Because it has a gas leak alarm function, it needs to be installed in a sealed manner.

[0003] like Figure 1 As shown, the current connection structure of the gas alarm wiring includes a housing 1 and a connector 11 with threads at both ends. The connector 11 has an integrally formed limiting shoulder 5 for fixing a sealing gasket 13 in the middle, and also includes a hexagonal nut 12 and a sealing gasket. A through hole adapted to the connector 11 is provided on the housing 1 of the meter. During installation, the sealing gasket 13 is first placed on the connector 11 from top to bottom and limited by the limiting shoulder 5. Then, the connector 11 is passed through the through hole on the housing 1 from bottom to top. Finally, glue is applied to the bottom of the hexagonal nut 12, and the hexagonal nut 12 is placed on the upper end of the connector 11 and tightened, so that the hexagonal nut 12 and the sealing gasket 13 together clamp the housing 1. Although this connection structure can ensure sealing, it uses more materials and the installation process is relatively complex.

[0004] Chinese utility model patent with authorization announcement number CN209216263U discloses an alarm port installation structure and a gas device. The alarm socket is snapped onto the mounting base by a horizontal snap-fit ​​structure, and a limiting structure is set to limit the insertion depth of the alarm. The above alarm port installation structure uses less material and is easy to install, but the structure is complex and it is difficult to guarantee the sealing. Utility Model Content

[0005] To address the aforementioned shortcomings in the existing technology, this utility model aims to provide a screw-type connection structure for gas alarm connection cables, thereby reducing the installation materials for gas alarm connection cables, simplifying the installation structure and steps, and ensuring installation sealing.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A screw-type connection structure for a gas alarm connection wire includes a housing and a connector. The housing has a mounting hole for fitting the connector, and the mounting hole has an internal thread. The connector includes a first external thread portion for connecting to the housing and adapted to the mounting hole. The connector also includes a limiting shoulder fixedly connected to the first external thread portion. The size of the limiting shoulder is larger than the outer diameter of the first external thread portion. A first limiting block is fixedly provided on the end face of the limiting shoulder facing the first external thread portion. A snap-fit ​​groove is provided on the side of the housing that abuts against the limiting shoulder, which coincides with the rotation trajectory of the first limiting block. A second limiting block is fixedly provided in the snap-fit ​​groove. The position of the second limiting block in the snap-fit ​​groove is adapted to the first limiting block, so that when the connector is screwed to the position where the limiting shoulder abuts against the housing, the first limiting block and the second limiting block abut against each other.

[0007] As a limitation of this utility model: the snap-fit ​​groove is annular, the setting direction of the second limiting snap-fit ​​block is tangent to the snap-fit ​​groove, the setting direction of the first limiting snap-fit ​​block is tangent to the first external thread, the end face of the first limiting snap-fit ​​block in front of its screwing path is a downward slope, the end face of the first limiting snap-fit ​​block behind its screwing path is a straight surface perpendicular to the limiting shoulder, the end face of the second limiting snap-fit ​​block facing the screwing direction of the first limiting snap-fit ​​block is a slope with the same slope direction as the first limiting snap-fit ​​block, and the end face of the second limiting snap-fit ​​block away from the screwing direction of the first limiting snap-fit ​​block is a straight surface perpendicular to the snap-fit ​​groove.

[0008] As a limitation of this utility model: the end face of the first limiting block along its screwing path is a downward convex arc-shaped slope, and the end face of the second limiting block facing the screwing direction of the first limiting block is an outward convex arc-shaped slope with the same direction as the slope of the first limiting block.

[0009] As a limitation of this utility model: one first limiting block is provided on each side of the first external thread portion, and one second limiting block is provided at each end of the locking groove.

[0010] As a limitation of this utility model: the height of the first limiting block, the height of the second limiting block, and the depth of the locking groove are all equal.

[0011] As a limitation of this utility model: one first limiting block is provided on each side of the first external thread portion, and one second limiting block is provided at each end of the locking groove.

[0012] As a limitation of this utility model: the end of the limiting shoulder away from the first external thread is fixedly connected to a second external thread that is coaxial with the first external thread; a connecting wire is provided through the connector; the connecting wire includes a wire portion extending from the upper end of the first external thread and a connector portion for connecting to a gas alarm; the second external thread is a hollow structure; and the connector portion is disposed in the hollow structure of the second external thread.

[0013] As a limitation of this utility model: the connector portion includes two connectors that are spaced apart and extend downwards, and the connecting line of the two connectors is parallel to the connecting line of the two first limiting blocks.

[0014] As a limitation of this utility model: a connecting seat for connecting to the connector is fixed on the housing, the thickness of the connecting seat is greater than the thickness of the housing, and the mounting holes and locking grooves are all provided on the connecting seat.

[0015] As a limitation of this utility model: the outer edge of the limiting shoulder is a hexagonal structure.

[0016] By adopting the above technical solution, the beneficial effects achieved by this utility model compared with the prior art are as follows:

[0017] This utility model connects the alarm wiring to the housing using a combination of threads and snap-fit ​​mechanisms. First, since the first external thread, the limiting shoulder, and the second external thread are integrated, no nuts, sealing rings, or other materials are needed during installation, reducing the amount of materials required. Second, the combination of threads and snap-fit ​​mechanisms allows for installation simply by tightening, simplifying the installation process compared to installing gaskets and applying adhesive. Finally, the threads provide a seal, and the engagement of the first and second limiting blocks prevents loosening, ensuring a tight seal compared to a simple snap-fit ​​structure.

[0018] The connecting lines of the two connectors, the two first limiting blocks, and the two second limiting blocks of this utility model are all parallel to each other, so that the arrangement of the two connectors is consistent with the arrangement of the two second limiting blocks. The design ensures that the arrangement direction of the two second limiting blocks is consistent with the target arrangement direction of the connectors, which can guarantee that when the connectors are installed in place, the direction of the connectors will meet the direction requirements when connected to the gas alarm below, without the need for further direction adjustment of the connectors.

[0019] In summary, this utility model reduces the installation materials for gas alarm connection wires, simplifies the installation structure and steps of gas alarm connection wires, and ensures the sealing performance of gas alarm connection wires during installation. It is suitable for connecting gas alarm connection wires to meter housings. Attached Figure Description

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a schematic diagram of the existing technology;

[0022] Figure 2 This is an installation diagram of an embodiment of the present utility model;

[0023] Figure 3 This is a schematic diagram of the shell structure in an embodiment of the present utility model;

[0024] Figure 4 This is a schematic diagram illustrating the installation of the first limiting block and the second limiting block in an embodiment of this utility model. Figure 4 (a) is a schematic diagram showing the positions of the first and second limit blocks during installation. Figure 4 (b) is a schematic diagram showing the installation positions of the first and second limit blocks after installation;

[0025] Figure 5 This is an installation diagram from another angle of an embodiment of the present utility model;

[0026] Figure 6 This is a cross-sectional view of the connector in an embodiment of this utility model;

[0027] Figure 7 This is a schematic diagram of the structure after installation according to an embodiment of the present invention.

[0028] In the diagram: 1-Housing, 2-Connecting seat, 3-Mounting hole, 4-First external thread, 5-Limiting shoulder, 6-Second external thread, 7-Connecting wire, 8-First limiting block, 9-Snap-fit ​​groove, 10-Second limiting block, 11-Connector, 12-Hex nut, 13-Sealing gasket, 14-Joint. Detailed Implementation

[0029] The preferred embodiments of this utility model are described below with reference to the accompanying drawings. It should be understood that the screw-type connection structure of the gas alarm wiring described herein is a preferred embodiment and is only used for illustration and explanation of this utility model, and does not constitute a limitation thereof.

[0030] The directional terms or positional relationships used in this utility model, such as "up," "down," "left," and "right," are based on the positional relationships in the accompanying drawings of this utility model. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component must have a specific orientation, or that it must be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the content protected by this utility model.

[0031] This implementation example Figures 2-5 As shown, a screw-type connection structure for a gas alarm connection cable includes a housing 1 and a connector assembled by screwing.

[0032] like Figure 2As shown in the figure, housing 1 is a partial structure, and connecting seat 2 is installed on the lower end face of housing 1. Therefore, the upper side of housing 1 is the interior of housing 1, and the lower side is the exterior of housing 1. In other embodiments, the installation position of connecting seat 2 in housing 1 can be adapted as needed. To improve the structural stability of the connection, connecting seat 2 is integrally provided at the connection point of housing 1 with the connector, which locally thickens housing 1. Therefore, the thickness of connecting seat 2 is greater than the thickness of housing 1. A mounting hole 3 for fitting the connector is provided on connecting seat 2. The mounting hole 3 is an internally threaded hole.

[0033] The connector is a rotating structure, assembled onto the housing 1 by screwing. From top to bottom, the connector includes an integrally formed first external thread portion 4, a limiting shoulder 5, and a second external thread portion 6, with a connecting wire 7 passing through it. The connecting wire 7 includes a wire portion extending from the upper end of the first external thread portion 4, and a connector portion for connecting to a gas alarm. The second external thread portion 6 is a hollow structure, with the connector portion disposed within the hollow structure of the second external thread portion 6. The first external thread portion 4 is used to connect to the housing 1 and is adapted to the mounting hole 3 of the internal thread. The limiting shoulder 5 is larger than the outer diameter of the first external thread portion 4 to limit the screwing depth of the first external thread portion 4. In this embodiment, the outer edge of the limiting shoulder 5 is hexagonal for easy installation. The second external thread portion 6 is used to connect to the gas meter alarm and is coaxial with the first external thread portion 4.

[0034] A matching snap-fit ​​structure is provided between the housing 1 and the connector to prevent loosening of the threaded parts. For example... Figure 2 As shown, since the size of the limiting shoulder 5 is larger than the outer diameter of the first external thread portion 4, a first limiting block 8 is fixed on the end face (i.e., the upper end face) of the limiting shoulder 5 facing the first external thread portion 4, as shown. Figure 3 As shown, a locking groove 9 is provided on the side of the housing 1 that abuts against the limiting shoulder 5, coinciding with the rotation trajectory of the first limiting block 8. Since a certain thickness is required to create the locking groove 9, it is located within the area covered by the connecting seat 2. Because the connector is screwed on, the rotation trajectory of the first limiting block 8 is circular; therefore, the locking groove 9 is annular. The width of the locking groove 9 is equal to or slightly greater than the width of the first limiting block 8, and the depth of the locking groove 9 is equal to or slightly greater than the height of the first limiting block 8. When the connector is about to be screwed into place, the first limiting block 8 slides in the locking groove 9. A second limiting block 10 is fixed in the locking groove 9. The position of the second limiting block 10 in the locking groove 9 is adapted to the first limiting block 8, so that when the connector is screwed into place (at which point the upper end face of the limiting shoulder 5 abuts against the lower end face of the housing 1), the first limiting block 8 and the second limiting block 10 abut against each other.

[0035] like Figure 2 , Figure 3As shown, the first limiting block 8 is tangent to the first external thread 4, meaning its length is along the tangent of the first external thread 4, and there is a certain distance between the first limiting block 8 and the first external thread 4. Correspondingly, the second limiting block 10 is tangent to the engaging groove 9, meaning its length is along the tangent of the engaging groove 9, and the height of the second limiting block 10 is equal to the height of the first limiting block 8, facilitating their contact. Furthermore, Figure 2 The direction of the middle arrow indicates the screwing direction of the connector. For easier installation, the front end face of the first limiting block 8 along its screwing path is a downward convex arc-shaped slope. The end face of the second limiting block 10 facing the screwing direction of the first limiting block 8 is an inclined slope with the same inclination direction as the slope of the first limiting block 8. The rear end face of the first limiting block 8 along its screwing path is a straight surface perpendicular to the limiting shoulder 5. The end face of the second limiting block 10 away from the screwing direction of the first limiting block 8 is a straight surface perpendicular to the locking groove 9. Figure 4 As shown in (a), when the connector is screwed on, the first limiting block 8 moves in the direction of the arrow in the figure, so that the first limiting block 8 contacts the arc surface of the second limiting block 10. The arc surface reduces the resistance to further screwing. Under the action of the arc surface, it continues to move in the direction of the arrow until the first limiting block 8 passes the second limiting block 10. The end face of the first limiting block 8 along its screwing path abuts against the end face of the second limiting block 10 away from the screwing direction of the first limiting block 8, forming a... Figure 4 (b) The limiting structure completes the assembly of the connector, and the position of the connector is tightly locked by the first limiting block 8 and the second limiting block 10. In other embodiments, as long as the end face of the first limiting block 8 along its screwing path is a downward slope, and the end face of the second limiting block 10 facing the screwing direction of the first limiting block 8 is an outwardly convex arc-shaped slope with the same slope direction as the first limiting block 8, the screwing resistance can be reduced and the installation can be facilitated. To improve structural stability, one first limiting block 8 is provided on each side of the first external thread portion 4, and one second limiting block 10 is provided at each end of the locking groove 9.

[0036] like Figure 5 As shown, the connector portion of the connecting wire 7 includes two spaced, downward-extending connectors 14. After installation, the connecting wires of the connectors 14 need to be parallel to the orientation of the housing 1. Figure 5 To ensure the gas alarm can be smoothly installed on the second external thread 6, the width direction of the thread must be considered. Figure 6 As shown, in this embodiment, the connecting lines of the two connectors 14 are parallel to the connecting lines of the two first limiting blocks 8, and the connecting lines of the two second limiting blocks 10 along the end faces of the spiral ends are parallel to the setting direction of the housing 1. Figure 5(in the width direction), so that after installation, the connecting lines of the two connectors 14, the connecting lines of the two first limiting blocks 8, and the connecting lines of the two second limiting blocks 10 are all parallel to the setting direction of the housing 1. Figure 5 The width direction of the connector ensures that when the connector is installed in place, its direction exactly meets the requirements for connecting to the gas alarm below.

[0037] In using this embodiment, an installation tool is used to screw the connector into the through hole of the connector 2 in the housing 1 until the two straight surfaces of the first limiting block 8 and the second limiting block 10 abut against each other, forming a... Figure 7 The structure shown indicates that the installation is complete.

Claims

1. A screw-on connection structure for a gas alarm wiring harness, comprising a housing and a connector, wherein the housing has a mounting hole for fitting the connector, the mounting hole has an internal thread, the connector includes a first external thread portion for connecting to the housing and adapted to the mounting hole, and the connector further includes a limiting shoulder fixedly connected to the first external thread portion, the limiting shoulder being larger than the outer diameter of the first external thread portion, characterized in that: A first limiting block is fixed on the end face of the limiting shoulder facing the first external thread. The side of the housing that abuts against the limiting shoulder has a locking groove that coincides with the rotation trajectory of the first limiting block. A second limiting block is fixed in the locking groove. The position of the second limiting block in the locking groove is adapted to the first limiting block, so that when the connector is screwed to the position where the limiting shoulder abuts against the housing, the first limiting block and the second limiting block abut against each other.

2. The screw-on connection structure of the gas alarm connection wire according to claim 1, characterized in that: The snap-fit ​​groove is annular. The setting direction of the second limiting snap-fit ​​block is tangent to the snap-fit ​​groove. The setting direction of the first limiting snap-fit ​​block is tangent to the first external thread. The end face of the first limiting snap-fit ​​block in front of its screwing path is a downward slope. The end face of the first limiting snap-fit ​​block behind its screwing path is a straight face perpendicular to the limiting shoulder. The end face of the second limiting snap-fit ​​block facing the screwing direction of the first limiting snap-fit ​​block is a slope with the same direction as the slope of the first limiting snap-fit ​​block. The end face of the second limiting snap-fit ​​block away from the screwing direction of the first limiting snap-fit ​​block is a straight face perpendicular to the snap-fit ​​groove.

3. The screw-on connection structure of the gas alarm connection wire according to claim 2, characterized in that: The end face of the first limiting block along its screwing path is a downward convex arc-shaped slope, and the end face of the second limiting block facing the screwing direction of the first limiting block is a convex arc-shaped slope with the same direction as the slope of the first limiting block.

4. The screw-on connection structure of the gas alarm connection wire according to claim 3, characterized in that: The height of the first limiting block, the height of the second limiting block, and the depth of the locking groove are all equal.

5. The screw-type connection structure of the gas alarm connection wire according to any one of claims 1 to 4, characterized in that: One first limiting block is provided on each side of the first external thread, and one second limiting block is provided at each end of the locking groove.

6. The screw-on connection structure of the gas alarm connection wire according to claim 5, characterized in that: The end of the limiting shoulder away from the first external thread is fixedly connected to a second external thread that is coaxial with the first external thread. A connecting wire is provided through the connector. The connecting wire includes a wire portion extending from the upper end of the first external thread and a connector portion for connecting to a gas alarm. The second external thread is a hollow structure, and the connector portion is located in the hollow structure of the second external thread.

7. The screw-on connection structure of the gas alarm connection wire according to claim 6, characterized in that: The connector section includes two spaced, downward-extending connectors, with the connecting lines of the two connectors parallel to the connecting lines of the two first limiting blocks.

8. The screw-type connection structure of the gas alarm connection wire according to any one of claims 1 to 4, 6, and 7, characterized in that: The housing is fixed with a connector for connecting to the connector head. The thickness of the connector is greater than the thickness of the housing. Mounting holes and locking grooves are all provided on the connector.

9. The screw-type connection structure of the gas alarm connection wire according to claim 8, characterized in that: The outer edge of the limiting shoulder has a hexagonal structure.

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