Pipeline connecting device convenient to operate
The mechanical engagement structure of the locking nut and the clamping ring and the double sealing ring design solve the problem of loosening of the pipe connection device under axial pulling force or vibration, achieving a pipe connection effect that is convenient to operate, reliable in sealing and widely adaptable.
Patent Information
- Application Number
- CN202511000103.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-21
- Publication Date
- 2025-09-19
AI Technical Summary
Existing pipe connection devices are prone to loosening under axial pulling force or vibration, causing the pipe to fall off, unstable sealing performance, cumbersome operation and poor versatility, making it difficult to adapt to the needs of various pipe diameters and media.
It adopts a locking nut, sleeve and clamping ring structure, and uses the mechanical engagement between the conical slope of the clamping ring and the inner wall of the sleeve to achieve absolute locking of the pipe. Combined with the double sealing ring design, it ensures sealing and stability, and improves adaptability through modular design.
It realizes convenient pipe connection and disassembly process, prevents fluid leakage, adapts to various pipe diameters and media, and reduces maintenance costs.
Smart Images
Figure CN120667598A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of pipelines, and in particular relates to a pipeline connecting device that is easy to operate. Background Art
[0002] Among traditional pipe connection methods, threaded connections rely on auxiliary materials such as raw tape and sealants to achieve sealing. This is not only cumbersome to operate, but also prone to leakage due to aging of the sealing materials after long-term use. Although flange connections have better sealing performance, they require multiple components such as bolts and gaskets. During installation, the bolt holes must be precisely aligned and tightened evenly, which is time-consuming and labor-intensive, especially in confined spaces. For non-metallic pipes such as plastic pipes, the commonly used snap-on or socket-type connection devices generally have the problem of insufficient locking reliability. When the pipeline is subjected to axial pulling force or vibration, the connection part is prone to loosening, and even cause the pipe to fall off, causing fluid leakage accidents. Although some devices improve stability by adding a locking structure, they often sacrifice operational convenience. Special tools are required to unlock, which brings great inconvenience to subsequent maintenance.
[0003] In terms of sealing performance, existing devices often use a single sealing ring design, which is prone to failure due to misalignment during installation or deformation under long-term pressure. This risk is particularly high in environments with high-pressure fluids or corrosive media. Furthermore, most connection devices lack versatility. A single device specification is only compatible with pipes of a specific diameter, making it difficult to meet the needs of complex piping systems with multiple pipe diameters and multiple media transmission, increasing equipment procurement and inventory management costs.
[0004] Furthermore, some connection devices suffer from inadequate component design. For example, the locking components may not fit the pipe well, which can easily damage the pipe surface. Alternatively, the sealing materials may lack heat and corrosion resistance, limiting their use in extreme operating conditions. Therefore, developing a pipe connection device that combines ease of operation, reliable locking, stable sealing, and broad compatibility is crucial to addressing these challenges. Summary of the Invention
[0005] In response to the above-mentioned shortcomings in the prior art, the present invention provides an easy-to-operate pipe connection device to solve the problems in the prior art that when the pipeline is subjected to axial pulling force or vibration, the connection parts are prone to loosening, and even cause the pipe to fall off, resulting in fluid leakage accidents.
[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:
[0007] A pipe connection device that is easy to operate includes a locking nut, a shell body and a sleeve. The sleeve is arranged inside the shell body. The locking nut fastens the shell body and the sleeve. A clamping ring is installed on the sleeve. A first sealing ring and a second sealing ring are provided inside the sleeve.
[0008] Furthermore, the outer ring of the sleeve is provided with a groove for engaging the second sealing ring.
[0009] Furthermore, a group of isolation rings is provided between two adjacent groups of the first sealing rings.
[0010] Furthermore, one end of the clamping ring is provided with an opening.
[0011] Furthermore, a stud is provided in the middle of the shell body, and threads are provided at both ends of the shell body.
[0012] Furthermore, the outer end of the sleeve is provided with a protruding annular structure.
[0013] Furthermore, a pipeline groove is provided at the top of the locking nut.
[0014] Furthermore, the first sealing ring and the second sealing ring are made of nylon 66 or nylon 12.
[0015] When leaving the factory, the locking nut and the housing body are tightened. At this time, the sleeve is fixed in the housing body by the locking nut. The clamping ring, first sealing ring, second sealing ring and other components are in a "pre-installed" state to ensure that the components will not loosen or shift during transportation.
[0016] During the installation process, the operator inserts the plastic pipe to be connected through the pipe groove of the locking nut until it is inserted into the sleeve and into place.
[0017] During the insertion process, the sharp edge of the metal clamping ring will initially embed into the outer wall of the plastic pipe to form a preliminary fixation; at the same time, the first sealing ring and the second sealing ring are squeezed due to the insertion of the pipe, close to the outer wall of the pipe, and begin to play a sealing role.
[0018] When the pipe is subjected to an outward pulling force, the conical inclined surface of the inner wall of the sleeve and the conical inclined surface of the clamping ring move relative to each other, and the sleeve generates inward pressure on the clamping ring.
[0019] Because the clamping ring has an opening, it will shrink inwards under pressure, and its sharp edge will further embed into the outer wall of the plastic pipe.
[0020] The greater the pulling force, the more obvious the shrinkage of the clamping ring and the deeper the sharp edge is embedded. Ultimately, the pipe is absolutely locked through "mechanical bite" to prevent it from falling off.
[0021] When the pipe needs to be disassembled, the locking nut is loosened to separate it from the shell body by a certain distance. The sleeve is no longer fixed by the locking nut, and the pressure on the clamping ring is released.
[0022] The clamping ring loosens due to its own elasticity, and the sharp edge separates from the outer wall of the plastic pipe. The pipe can be directly pulled out of the sleeve to complete the unlocking.
[0023] Compared with the prior art, the present invention has the following beneficial effects:
[0024] Simply insert the pipe into place without the need for additional tools, and the initial locking can be achieved by relying on the mechanical cooperation between the clamping ring and the sleeve; the subsequent fixation can be completed by tightening the locking nut, and the operation process is simple.
[0025] The unlocking process is flexible and fast: when unlocking, you only need to loosen the lock nut, the pressure of the sleeve on the clamping ring is released, the clamping ring elastically resets, and the pipe can be directly removed, avoiding the problem of "difficult disassembly" of traditional connection devices. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 Schematic diagram of the exploded structure of an embodiment of a pipe connection device that is easy to operate according to the present invention Figure 1 ;
[0027] Figure 2 Schematic diagram of the exploded structure of an embodiment of a pipe connection device that is easy to operate according to the present invention Figure 2 ;
[0028] Figure 3 This is a schematic cross-sectional view of an embodiment of a pipe connection device that is easy to operate according to the present invention;
[0029] The reference numerals in the drawings of the specification include: locking nut 1 , pipeline groove 10 , housing body 2 , sleeve 3 , groove 31 , clamping ring 4 , opening 41 , isolation ring 5 , first sealing ring 6 , and second sealing ring 7 . DETAILED DESCRIPTION
[0030] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments:
[0031] It should be noted that the same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0032] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of these features.
[0033] In the description of the present invention, unless otherwise clearly specified and limited, if the term "connection" appears to indicate the connection relationship between components, the term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0034] Example
[0035] like Figure 1-3 As shown, a pipe connection device that is easy to operate includes a locking nut 1, a shell body 2 and a sleeve 3. The sleeve 3 is arranged inside the shell body 2. The locking nut 1 fastens the shell body 2 and the sleeve 3. A clamping ring 4 is installed on the sleeve 3. A first sealing ring 6 and a second sealing ring 7 are provided inside the sleeve 3.
[0036] The outer ring of the sleeve 3 is provided with a groove 31 for engaging the second sealing ring 7, a group of isolation rings 5 is provided between the two adjacent groups of first sealing rings 6, an opening 41 is provided at one end of the clamping ring 4, a stud is provided in the middle of the shell body 2, and threads are provided at both ends of the shell body 2, a protruding annular knot is provided at the outer end of the sleeve 3, and a pipeline groove 10 is provided at the top of the locking nut 1.
[0037] The first sealing ring 6 and the second sealing ring 7 are made of nylon 66 or nylon 12. When leaving the factory, the locking nut 1 and the housing body 2 are tightened. At this time, the sleeve 3 is fixed in the housing body by the locking nut. The clamping ring 4, the first sealing ring 6, the second sealing ring 7 and other components are in a "pre-installed" state to ensure that the components will not loosen or shift during transportation.
[0038] During the installation process, the operator inserts the plastic pipe to be connected through the pipe groove 10 of the locking nut until it is inserted into the sleeve 3 and the end of the pipe contacts the internal limiting structure of the sleeve.
[0039] During the insertion process, the sharp edge of the metal clamping ring 4 will initially embed into the outer wall of the plastic pipe to form a preliminary fixation; at the same time, the first sealing ring 6 and the second sealing ring 7 are squeezed due to the insertion of the pipe, close to the outer wall of the pipe, and begin to play a sealing role.
[0040] When the pipe is subjected to an outward pulling force, the tapered inclined surface of the inner wall of the sleeve 3 and the tapered inclined surface of the clamping ring 4 move relative to each other, and the sleeve generates inward pressure on the clamping ring.
[0041] Because the clamping ring is provided with an opening 41, it will shrink inwards under pressure, and its sharp edge will further embed into the outer wall of the plastic pipe. The metal hardness is higher than that of plastic, so the clamping ring will not be damaged by embedding.
[0042] The greater the pulling force, the more obvious the shrinkage of the clamping ring and the deeper the sharp edge is embedded. Ultimately, the pipe is absolutely locked through "mechanical bite" to prevent it from falling off.
[0043] When the pipe needs to be disassembled, the locking nut 1 is loosened to separate it from the shell body 2 by a certain distance. The sleeve 3 is no longer fixed by the locking nut, and the pressure on the clamping ring 4 is released.
[0044] The clamping ring is reset and loosened due to its own elastic opening structure, and the sharp edge is separated from the outer wall of the plastic pipe. The pipe can be directly pulled out of the sleeve to complete the unlocking.
[0045] This structure is easy to operate and has high installation and unlocking efficiency. No complicated tools are required for installation. The pipe only needs to be inserted into place without the assistance of additional tools. The initial locking can be achieved by relying on the mechanical cooperation between the clamping ring and the sleeve. The subsequent fixation can be completed by tightening the locking nut. The operation process is simple.
[0046] To unlock, you only need to loosen the lock nut, the pressure of the sleeve on the clamping ring is released, the clamping ring elastically resets, and the pipe can be removed directly, avoiding the problem of "difficult disassembly" of traditional connection devices.
[0047] A first sealing ring 6 and a second sealing ring 7 are provided inside the sleeve to form a "double barrier" that can effectively prevent fluid leakage; the second sealing ring is fixed by a groove 31 on the outer ring of the sleeve to prevent the seal from shifting during installation or use, thereby ensuring sealing stability.
[0048] An isolation ring 5 is provided between adjacent first sealing rings to prevent the sealing rings from being squeezed and deformed against each other, ensuring that each sealing ring can evenly fit the outer wall of the pipe, thereby improving sealing reliability and being particularly suitable for high-pressure fluid scenarios.
[0049] The sealing ring is made of nylon 66 or nylon 12, which has the characteristics of chemical corrosion resistance, high temperature resistance (-40℃ to 120℃), wear resistance, etc., and is suitable for various fluid media such as water, oil, and gas.
[0050] The clamping ring 4 is made of metal and has an opening 41 at one end, which has a certain elastic deformation ability. When the pipe is pulled outward, the conical inclined surface of the inner wall of the sleeve 3 and the conical inclined surface of the clamping ring abut against each other, forcing the clamping ring to shrink inward due to the opening structure, and its sharp edge will further embed into the outer wall of the plastic pipe, forming a self-tightening effect of "the greater the pulling force, the stronger the locking force", which completely prevents the pipe from falling off.
[0051] The protruding annular structure at the outer end of the sleeve cooperates with the pipe groove 10 of the locking nut 1 to fix the position of the sleeve when tightening, ensure the fit accuracy between the clamping ring and the inclined surface of the sleeve, and ensure that the locking mechanism is stable and effective.
[0052] There is a stud in the middle of the shell body 2, and threads are provided at both ends. It can be used to directly connect two pipes, or to connect with other equipment such as valves and pump bodies through threads, adapting to different installation environments.
[0053] The locking nuts, sleeves, clamping rings and other components are modularly designed to facilitate mass production and replacement, reducing maintenance costs.
[0054] The above is only an embodiment of the present invention. Common knowledge such as the specific structure and characteristics of the scheme is not described in detail here. Ordinary technicians in the relevant field are aware of all common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the guidance of this application. Some typical well-known structures or well-known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.
Claims
1. A pipe connection device that is easy to operate, characterized in that: The invention comprises a locking nut (1), a shell body (2) and a sleeve (3); the sleeve (3) is arranged inside the shell body (2); the locking nut (1) fastens the shell body (2) and the sleeve (3); a clamping ring (4) is installed on the sleeve (3); and a first sealing ring (6) and a second sealing ring (7) are arranged inside the sleeve (3).
2. The easy-to-operate pipe connection device according to claim 1, characterized in that: The outer ring of the sleeve (3) is provided with a groove (31) for engaging with the second sealing ring (7).
3. The easy-to-operate pipe connection device according to claim 1, characterized in that: A set of isolation rings (5) is provided between two adjacent sets of the first sealing rings (6).
4. The easy-to-operate pipe connection device according to claim 1, characterized in that: One end of the clamping ring (4) is provided with an opening (41).
5. The easy-to-operate pipe connection device according to claim 1, characterized in that: The middle of the shell body (2) is a stud, and both ends of the shell body (2) are provided with threads.
6. The easy-to-operate pipe connection device according to claim 1, characterized in that: The outer end of the sleeve (3) is provided with a protruding annular structure.
7. The easy-to-operate pipe connection device according to claim 1, characterized in that: The top end of the locking nut (1) is provided with a pipeline groove (10).