A connecting device for connecting a liquefied petroleum gas cylinder valve and a pressure regulator

Abstract

This utility model relates to the field of pipeline connection device technology, and provides a connection device for connecting a liquefied petroleum gas cylinder valve and a pressure regulator. It includes two expansion tubes, each with a connector installed on one side. Two connecting strips for positioning the expansion tubes are provided on the outer sides of the two expansion tubes. A telescopic gas pipe is provided between one side of the two expansion tubes, and insertion tubes are installed at both ends of the telescopic gas pipe. An installation ring is integrally formed on the inner wall of each expansion tube. This solution fixes the expansion tubes to the gas cylinder and pressure regulator, replacing the original threaded connection holes. Subsequently, the connection between the gas cylinder and pressure regulator is completed by inserting the insertion tubes into the installation rings. The insertion tubes can press the sealing gasket tightly against the installation ring over a large area, ensuring a sealing effect. Simultaneously, the presence of the expansion tubes prevents the threads from wearing down due to repeated engagement and disengagement.

Description

Technical Field

[0001] This utility model belongs to the technical field of pipeline connection devices, and in particular relates to a connection device for connecting a liquefied petroleum gas cylinder valve and a pressure regulator. Background Technology

[0002] When using liquefied petroleum gas (LPG) cylinders in appliances such as gas stoves and water heaters, it is necessary to connect the cylinder valve and the pressure regulator. Current technology typically uses a threaded connection. Specifically, the regulator's input end has an internal thread, which connects to the external thread of the cylinder valve by rotating and tightening. To ensure airtightness, a separate rubber sealing ring is usually installed at the threaded connection. This uses the elastic deformation of the rubber to fill the microscopic gaps between the metal parts, thereby preventing gas leakage. However, this connection method relies entirely on an independent rubber sealing ring for its sealing effect. As a vulnerable component, this sealing ring is susceptible to aging, cracking, wear, and twisting or cutting due to improper installation. More commonly, this sealing ring is easily lost due to user negligence when replacing gas cylinders, leading to a direct leakage path during the next connection and creating a serious safety hazard. Furthermore, in the daily operation of frequently changing gas cylinders, the critical precision sealing threads need to withstand repeated tightening and loosening. Especially under the non-standard operation of ordinary users, this direct and unbuffered disassembly and assembly can easily lead to wear, scratches, or even "tangled threads" on the thread pair. Once the threads of these core components are damaged, repair is extremely difficult, often meaning the entire part is scrapped and the replacement cost is high. Therefore, it is necessary to design a connection device for connecting the liquefied petroleum gas cylinder valve and the pressure regulator. Utility Model Content

[0003] This utility model provides a connecting device for connecting a liquefied petroleum gas cylinder valve and a pressure regulator, aiming to solve the problem of poor sealing effect and safety hazards of the current connection method.

[0004] This utility model is implemented as follows: a connecting device for connecting a liquefied petroleum gas cylinder valve and a pressure regulator includes two expansion tubes, each with a connector installed on one side, and two connecting strips for positioning the expansion tubes on the outer side of the two expansion tubes. A telescopic gas tube is provided between one side of the two expansion tubes, and an insertion tube is installed at both ends of the telescopic gas tube. An installation ring is integrally provided on the inner wall of each expansion tube, and a sealing gasket is adhered to one side of the outer wall of the insertion tube. A positioning component for positioning the insertion tube is provided on the outer side of the insertion tube.

[0005] Preferably, the end of the insertion tube is frustoconical, and a matching groove is provided on one side of the mounting ring.

[0006] Preferably, the outer wall of each expansion tube is provided with two semi-circular arc plates, and the outer wall of each arc plate is fixed to one end of the corresponding connecting strip. The outer wall of each arc plate is fixed with multiple ear plates, and the corresponding two ear plates are fixed together by buckles.

[0007] Preferably, the outer wall of the expansion tube is provided with multiple annular grooves, and the inner wall of the arc plate is provided with matching arc strips.

[0008] Preferably, the positioning component includes multiple positioning holes, which are respectively opened on both sides of the connecting strip near the end of the telescopic air tube. Both the front and rear ends of the insertion tube are fixed with a fixing box, and two telescopic spring rods are installed inside one end of each fixing box. A sliding block is installed at one end of each of the two telescopic spring rods. A positioning post is fixed at one end of each sliding block, and one end of each positioning post extends into the interior of the positioning hole. A lever is fixed at the top of each sliding block, and the top of each lever extends above the fixing box.

[0009] Preferably, the sliding block and the fixed box form a sliding connection, and the maximum sliding distance of the sliding block is greater than the length of the positioning column.

[0010] Compared with related technologies, the connecting device provided by this utility model for connecting the valve of a liquefied petroleum gas cylinder and a pressure regulator has the following advantages: By fixing the expansion tube to the gas cylinder and the pressure regulator, replacing the original threaded connection hole, the connection between the gas cylinder and the pressure regulator can be completed by inserting the insertion tube into the mounting ring and using the insertion tube and the telescopic gas tube. The insertion tube can press the sealing gasket tightly onto the mounting ring over a large area, ensuring a sealing effect. At the same time, the presence of the expansion tube can prevent the threads from wearing out due to repeated engagement and disengagement. Attached Figure Description

[0011] Figure 1 This is a top view cross-sectional structural diagram of the present invention; Figure 2 This is a partial top view cross-sectional structural diagram of the present invention; Figure 3 This is a side cross-sectional view of the fixing box of this utility model.

[0012] In the diagram: 1. Connector; 2. Expansion tube; 3. Arc plate; 4. Fixing box; 5. Connecting strip; 6. Insertion tube; 7. Telescopic air tube; 8. Sealing gasket; 9. Mounting ring; 10. Positioning hole; 11. Positioning post; 12. Lever; 13. Telescopic spring rod; 14. Sliding block; 15. Ear plate Detailed Implementation

[0013] Unless otherwise defined, 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 application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order. Example

[0014] A preferred embodiment of the connecting device for connecting a liquefied petroleum gas cylinder valve and a pressure regulator provided by this utility model is, for example... Figures 1 to 3 As shown: A connecting device for connecting a liquefied petroleum gas cylinder valve and a pressure regulator includes two expansion tubes 2, each with a connector 1 installed on one side, and two connecting strips 5 for positioning the expansion tubes 2 on their outer sides. A telescopic gas pipe 7 is provided between the two expansion tubes 2 on one side, and an insertion tube 6 is installed at both ends of the telescopic gas pipe 7. An installation ring 9 is integrally provided on the inner wall of each expansion tube 2, and a sealing gasket 8 is adhered to one side of the outer wall of the insertion tube 6. A positioning component for positioning the insertion tube 6 is provided on the outer side of the insertion tube 6. The end of the insertion tube 6 is frustoconical, and a matching groove is provided on one side of the mounting ring 9; Specifically, such as Figure 1 and Figure 2 As shown, when using this device, it is used in conjunction with connector 1, pressure regulator, and threaded pipe on the gas cylinder to make expansion tube 2 a new interface. Connector 1 does not need to be disassembled unless necessary. After expansion tube 2 is installed, connector 5 is fixed in place. Then, the end of insertion tube 6 is inserted into expansion tube 2 and positioned. This allows insertion tube 6 to press sealing gasket 8 tightly against the groove inside mounting ring 9. The contact area between insertion tube 6 and mounting ring 9 is large, and sealing gasket 8 covers a wide area. Therefore, the sealing effect here is better than that of a single sealing ring.

[0015] The outer wall of the expansion tube 2 is provided with two semi-circular arc plates 3, and the outer wall of the arc plate 3 is fixed to one end of the corresponding connecting strip 5. Multiple ear plates 15 are fixed to the outer wall of the arc plate 3, and the corresponding two ear plates 15 are fixed together by a buckle. The outer wall of the expansion tube 2 is provided with multiple annular grooves, and the inner wall of the arc plate 3 is provided with matching arc strips; Specifically, such as Figure 1 and Figure 2As shown, when the expansion tube 2 is installed, the arc strip on the arc plate 3 can be matched with the annular groove on the expansion tube 2 so that the arc plate 3 is attached to the outside of the expansion tube 2. At this time, the ear plates 15 on the two arc plates 3 correspond one to one. By connecting and fixing the ear plates 15 in the same group, the two arc plates 3 can form an integral ring around the outside of the expansion tube 2. In this way, the distance between the two expansion tubes 2 can be determined by the connecting strip 5.

[0016] The positioning assembly includes multiple positioning holes 10, which are respectively opened on both sides of the connecting strip 5 near the end of the telescopic air tube 7. The front and rear ends of the insertion tube 6 are fixed with fixing boxes 4, and two telescopic spring rods 13 are installed inside the fixing boxes 4. A sliding block 14 is installed at one end of the two telescopic spring rods 13. A positioning post 11 is fixed at one end of the sliding block 14, and one end of the positioning post 11 extends into the interior of the positioning hole 10. A lever 12 is fixed at the top of the sliding block 14, and the top of the lever 12 extends above the fixing box 4. The sliding block 14 and the fixed box 4 form a sliding connection, and the maximum sliding distance of the sliding block 14 is greater than the length of the positioning post 11; Specifically, such as Figure 1 and Figure 3 As shown, when the insertion tube 6 is inserted into the mounting ring 9 and pressed tightly, the positioning pin 11 is aligned with the positioning hole 10. At this time, under the push of the telescopic spring rod 13, the sliding block 14 can move inside the fixing box 4 and push the positioning pin 11 into the positioning hole 10, thereby maintaining the compression of the sealing gasket 8 by the insertion tube 6. Conversely, by moving the lever 12, the sliding block 14 can be driven to move against the telescopic spring rod 13, thereby completing the disassembly of the insertion tube 6.

[0017] It is worth noting that the circuits, electronic components, and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0018] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A connection device for connecting a liquefied petroleum gas cylinder valve and a pressure regulator, comprising two extension pipes (2), characterized in that: A connector (1) is installed on one side of each of the two expansion tubes (2), and two connecting strips (5) for positioning the expansion tubes (2) are provided on the outer side of the two expansion tubes (2). A telescopic air tube (7) is provided between one side of the two expansion tubes (2), and an insertion tube (6) is installed at both ends of the telescopic air tube (7). An installation ring (9) is integrally provided on the inner wall of each expansion tube (2), and a sealing gasket (8) is adhered to one side of the outer wall of the insertion tube (6). A positioning component for positioning the insertion tube (6) is provided on the outer side of the insertion tube (6).

2. A coupling device for coupling a liquefied petroleum gas cylinder valve and a pressure regulator as claimed in claim 1, wherein: The end of the insertion tube (6) is frustum-shaped, and a matching groove is provided on one side of the mounting ring (9).

3. A coupling device for coupling a liquefied petroleum gas cylinder valve and a pressure regulator as claimed in claim 1, wherein: The outer wall of the expansion tube (2) is provided with two semi-circular arc plates (3), and the outer wall of the arc plate (3) is fixed to one end of the corresponding connecting strip (5). The outer wall of the arc plate (3) is fixed with multiple ear plates (15), and the corresponding two ear plates (15) are fixed together by buckles.

4. A coupling device for coupling a liquefied petroleum gas cylinder valve and a pressure regulator as claimed in claim 3, wherein: The outer wall of the expansion tube (2) is provided with multiple annular grooves, and the inner wall of the arc plate (3) is provided with matching arc strips.

5. A connecting device for connecting a liquefied petroleum gas cylinder valve and a pressure regulator as described in claim 1, characterized in that: The positioning component includes multiple positioning holes (10), which are respectively opened on both sides of the connecting strip (5) near the end of the telescopic air tube (7). The front and rear ends of the insertion tube (6) are fixed with a fixing box (4), and two telescopic spring rods (13) are installed at one end of the fixing box (4). A sliding block (14) is installed at one end of the two telescopic spring rods (13). A positioning post (11) is fixed at one end of the sliding block (14), and one end of the positioning post (11) extends into the interior of the positioning hole (10). A lever (12) is fixed at the top of the sliding block (14), and the top of the lever (12) extends above the fixing box (4).

6. A coupling device for coupling a liquefied petroleum gas cylinder valve and a pressure regulator as claimed in claim 5, wherein: The sliding block (14) and the fixed box (4) form a sliding connection, and the maximum sliding distance of the sliding block (14) is greater than the length of the positioning column (11).

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