Double-clamping-sleeve connector for pipeline installation

Abstract

The utility model discloses a double-clamping-sleeve joint for pipeline installation, which relates to the technical field of sleeve joints and comprises a joint body, the outer sides of threaded joints on two sides of the joint body are connected with nuts in a meshed mode through threads, and clamping sleeves are fixed at the butt joint positions of the nuts and the threaded joints through front clamping sleeves and rear clamping rings. The nut can push the rear clamping ring to extrude the front clamping sleeve only by directly screwing the nut, so that the left end of the rear clamping ring is partially embedded into the right end of the front clamping sleeve, the clamping sleeve pipe is tightly held, meanwhile, the conical section is arranged in the inner cavity of the front clamping sleeve, the sealing ring is connected to the tail end of the conical section, and the clamping sleeve pipe enters the section to be subjected to tightening force, so that the clamping sleeve pipe is prevented from falling off. And the sealing ring has radial contraction force, so that the clamping sleeve is sealed, and the clamping sleeve is mounted.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of the sleeve joint, specifically relates to a double sleeve joint for pipeline installation. BACKGROUND

[0002] At present, the widely used pipeline connecting mode has pipe joints such as screw type, flared type and sleeve type, and different connecting forms and joints are adopted according to different working condition requirements and conditions. The sleeve type pipe joint has the advantages of good connection and sealing, convenient and fast installation operation and the like, and its application range and use quantity are continuously increasing. The double sleeve joint can provide full metal sealing, and the sealing performance is more reliable, and is suitable for various working conditions such as high pressure, vacuum and vibration.

[0003] The connection between the system pipeline and the high-pressure gas source usually adopts a small-diameter coil pipe, and the connection of the small-diameter pipe usually adopts a sleeve joint. However, the technical level of construction personnel is uneven, the installation quality of the sleeve joint is difficult to check, and the sleeve device of the existing sleeve joint is of an integrated structure. The irregular structure near the joint body and the nut end causes uneven stress of each part, and the structure is easily damaged under the influence of external force, resulting in damage to the connection and unstable transmission, which affects the normal use of the sleeve joint.

[0004] To solve the above problems, a double sleeve joint for pipeline installation is provided in the application. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the application is that the sleeve device of the existing sleeve joint has an irregular structure near the joint body and the nut end, causing uneven stress of each part, and the structure is easily damaged under the influence of external force, especially when the high-pressure pipeline is subjected to air tightness test.

[0006] To solve the above technical problems, the application discloses a double sleeve joint for pipeline installation, which comprises: a joint body, which is a hollow cylinder with two open ends, the joint body comprising a valve body in the middle, threaded joints on both sides of the valve body, a nut movably connected with the threaded joints, a front sleeve embedded in the opening end of the threaded joint, an inner thread formed on the inner wall of one end of the front sleeve, an outer thread of a rear clasp ring matched with the inner thread, and one part of the rear clasp ring connected with the inside of the threaded joint and the other part embedded in the nut near one end of the valve body. Wherein, one end of the front sleeve near the valve body is a tapered section that contracts inward, and the other end of the front sleeve away from the valve body is a cylindrical section that is in interference fit with the opening end of the threaded joint; a sealing washer is connected to the end of the tapered section; the rear clasp ring is in a cylindrical shape and is in interference fit with the opening end of the nut; the nut and the threaded joint are tightened through thread engagement, the inner periphery of the nut abuts against one end of the rear clasp ring, the other end of the rear clasp ring is guided to the inner periphery of the front sleeve provided with an inner thread through the threaded joint, the end of the rear clasp ring is contracted, the rear clasp ring tightly holds the sleeve pipe, and the connection between the sleeve pipe and the threaded joint is enhanced.

[0007] According to the embodiment of the application, the threaded joint is a tapered threaded joint, and the threads on the threaded joint are left-handed threads.

[0008] According to the embodiment of the application, the joint body is made of stainless steel, and the front sleeve is a PTEE front sleeve.

[0009] According to the embodiment of the application, the valve body is integrally formed with the threaded joints on both sides.

[0010] According to the embodiment of the application, the sealing washer is an O-shaped rubber washer.

[0011] According to the embodiment of the application, the outer wall of the threaded joint is provided with external threads, the inner wall of the threaded joint is provided with internal threads, and the threaded joint and the nut are fixed by external threads and internal threads.

[0012] According to the embodiment of the application, the surface of the threaded joint is provided with a lubricating layer.

[0013] According to the embodiment of the application, the diameter of the pipeline inside the valve body is smaller than the diameter of the pipeline inside the threaded joint.

[0014] Compared with the prior art, the technical scheme of the application has the following beneficial effects:

[0015] 1. In the double-sleeve joint of the utility model, the front sleeve is connected with the threaded head in a nested manner, one end of the front sleeve is connected with the end of the rear clasp ring in a threaded manner, the other end of the rear clasp ring is connected with the inner wall of the nut in a matched manner, the rear clasp ring and the front sleeve are tightly engaged when the nut is screwed, the tightness is improved, and the soft seal is also increased, the elastic deformation of the sealing ring enhances the sealing performance, the high pressure is more reliable, the overall connection structure is stable and reliable, and the problem of uneven force on each part of the sleeve pipe connection and easy structural damage is avoided.

[0016] 2. In the utility model, the rear clasp ring and the front sleeve are connected in a threaded manner, so that the sleeve pipe and the double-sleeve joint are convenient to connect and disassemble.

[0017] 3. In the utility model, the sleeve pipe is connected with the sleeve nut, the sleeve pipe is extruded at the threaded joint port, the nut and the threaded joint are screwed in a threaded manner, the other end of the rear clasp ring is connected with the threaded cylindrical section of the front sleeve in a threaded manner, the rear clasp ring is tightly held by the front sleeve, the rear clasp ring tightly holds the sleeve pipe, the connection between the sleeve pipe and the threaded joint is enhanced, and the problem of loosening of the sleeve pipe and the joint body during use is avoided.

[0018] 4. The sleeve joint of the utility model is very simple to install and operate, can be operated only by simple instructions, can reach the same qualified level, and is very efficient.

[0019] 5. The utility model discloses a soft sealing O-shaped ring, which greatly reduces the requirement for the steel pipe, improves the sealing effect of the double sleeve joint, and reduces the cost. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only related to some embodiments of the present application and are not a limitation on the present application.

[0021] Figure 1 A structure schematic diagram of a double sleeve joint for a pressure pipeline according to an embodiment of the present application is shown in the figure.

[0022] Figure 2 A structure schematic diagram of a double sleeve joint for a pressure pipeline according to an embodiment of the present application is shown in the figure.

[0023] The following is the explanation of the reference signs:

[0024] 1. sleeve pipe, 10. joint body, 11. threaded joint, 12. valve body, 20. nut, 30. front sleeve, 31. conical section, 32. cylindrical section, 33. sealing washer, 40. rear clasp. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be described clearly and completely in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0026] Unless otherwise defined, the technical terms or scientific terms used herein should be understood as the usual meaning understood by those skilled in the art. The "first", "second" and similar words used in the patent application description and claims of the present application do not represent any order, quantity or importance, but are used to distinguish different components. Similarly, "one" or "a" and similar words do not represent a quantity limit, but represent the existence of at least one.

[0027] According to Figure 1 , Figure 2As shown, the utility model discloses a double sleeve joint for pressure pipeline, including joint body 10, the outside of threaded joint 11 of both sides of joint body 10 is connected nut 20 through thread engagement, the butt joint of nut 20 and threaded joint 11 is completed to the fixing of sleeve pipe 1 through front sleeve 30, rear clasp 40, in the installation process, only need to tighten nut 20 directly, nut 20 can push rear clasp 40 extrude front sleeve 30, so that the left end part of rear clasp 40 is embedded into the right end of front sleeve 30, and the effect of holding tightly is played to sleeve pipe 1, and simultaneously, because the inner cavity of front sleeve 30 is provided with conical section, the end of conical section is connected with sealing washer 33, sleeve pipe 1 enters the section and is received tight force, and sealing washer 33 also has radial shrinkage force, so as to realize the sealing of sleeve pipe 1, and the installation of sleeve pipe 1 is completed.

[0028] In the embodiment, as shown, Figure 2 The joint body 10 is a hollow cylinder with two open ends, and includes a valve body 12 in the middle, threaded joints 11 on both sides of the valve body 12, a nut 20 movably connected with the threaded joints 11, a front sleeve 30 embedded in the open end of the threaded joint 11, an inner thread provided on the inner wall of one end of the front sleeve 30, and an outer thread of a rear clasp 40 matched with the inner thread, one part of the rear clasp 40 connected with the inside of the threaded joint 11 and the other part embedded in one end of the nut 20 close to the valve body 12.

[0029] Specifically, the valve body 12 is integrally formed with the threaded joints 11 on both sides, which is convenient for customization.

[0030] Specifically, the one end of the front sleeve 30 close to the valve body 12 is a conical section 31 that shrinks inward, and the other end of the front sleeve 30 away from the valve body 12 is a cylindrical section 32 that is interference-fitted with the open end of the threaded joint 11, which can prevent a gap from being generated at the abutting position between the open end of the threaded joint 11 and the outer wall of the front sleeve 30, and ensure the sealing effect. The inner wall of the cylindrical section 32 is provided with an inner thread matched with the outer thread of the rear clasp 40, which are connected by thread engagement, ensuring stable connection and facilitating installation and disassembly.

[0031] Specifically, the inner diameter of the outlet of the conical section 31 is matched with the outer diameter of the sleeve pipe 1, and the conical section 31 is connected with a sealing washer at the end. In the actual installation process, the sleeve pipe 1 entering the conical section 31 will be subjected to a certain shrinkage force, and when passing through the end of the conical section 31, it will also be subjected to a radial shrinkage force of the sealing washer 33, thereby playing a sealing role on the sleeve pipe 1. The sealing washer 33 is preferably an O-shaped rubber ring.

[0032] Specifically, the rear clasp 40 is in a cylindrical shape and is interference-fitted with one end of the nut 20, and the outer wall of the other end of the rear clasp 40 is interference-fitted with the inner wall of the left end opening of the nut 20, which increases the sealing effect of the utility model.

[0033] Specifically, the nut 20 is screwed with the threaded joint 11 through thread engagement, the inner periphery of the nut 20 abuts against one end of the rear clamping ring 40, and the other end of the rear clamping ring 40 is screwed into the inner periphery of the front clamping sleeve 30 provided with internal threads, causing the end of the rear clamping ring 40 to shrink, so that it tightly clamps the sleeve pipe 1, thereby enhancing the connection between the sleeve pipe 1 and the threaded joint 11.

[0034] Specifically, the outer wall of the threaded joint 11 is provided with external threads, and the inner wall of the threaded joint 11 is provided with internal threads, and the threaded joint 11 and the nut 20 are fixed through external threads and internal threads.

[0035] Specifically, the threaded joint 11 is a tapered threaded joint, and the threads on the threaded joint 11 are left-handed threads.

[0036] Specifically, the joint body 10 is made of stainless steel, and the front clamping sleeve 30 is a PTEE front clamping sleeve. The stainless steel double clamping sleeve joint is widely used in pipeline systems in the petroleum and chemical industry, food and beverage industry, pharmaceutical industry, cosmetics industry, electric power industry, metallurgy industry, etc., and has excellent corrosion resistance and high pressure resistance.

[0037] Specifically, the surface of the threaded joint 11 can also be provided with a lubricating layer, such as lubricating oil, which facilitates connection operation in actual operation.

[0038] Specifically, as shown in Figure 2 the diameter of the internal pipeline of the valve body 12 is smaller than the diameter of the internal pipeline of the threaded joint 11, and the internal pipeline of the valve body 12 is through with the internal pipeline of the threaded joint 11, and the inner diameter of the internal pipeline of the valve body 12 is preferably smaller than the outer diameter of the sleeve pipe 1, so as to prevent the sleeve pipe 1 from continuing to enter, and facilitate the judgment of whether the sleeve pipe 1 is inserted into the appropriate position of the joint body 10.

[0039] In this embodiment, the front clamping sleeve 30 is pushed into the joint body 10 and the sleeve pipe 1 to form a main seal, and the rear clamping ring 40 is screwed inward to tightly clamp the sleeve pipe 1; the rear clamping sleeve helps to generate an advanced engineering clamp effect, which can convert axial movement into radial extrusion on the sleeve pipe 1.

[0040] In this embodiment, the specific use process of the double clamping sleeve joint for pressure pipeline is as follows: the high-pressure tapered threaded joint 11 is installed, the pipe processing taper angle is specified, the threads are left-handed threads, burrs and debris should be removed after the tapered threaded joint 11 is processed, the taper should not have scratches and damage, and the cutting oil on the inner wall of the pipe should be cleaned. Before installation, lubricating oil is applied to the front clamping sleeve 30 pipe 1 joint and threads, the front clamping sleeve 30 is first placed into the threaded joint 11, the nut 20 and the rear clamping ring 40 are screwed onto the sleeve pipe 1, one end of the rear clamping ring 40 is clamped into the inner wall of the nut 20, and then the sleeve pipe 1, the rear clamping ring 40 and the nut 20 are inserted into the joint body 10 together, and after hand tightening, a torque wrench is used to screw to the required torque value.

[0041] The working principle of the double sleeve joint for pressure pipeline of the application is that the sleeve pipe 1 is inserted into the threaded joint 11 in sequence through the nut 20 and the rear clamping ring 40, the inner thread of the nut 20 is matched with the outer thread of the threaded joint 11 at one end by screwing the nut 20, thereby realizing the connection of the nut 20 and the threaded joint 11, in the process of gradually screwing the nut 20, the nut 20 can drive the rear clamping ring 40 to extrude the front sleeve 30, so that the left end part of the rear clamping ring 40 is embedded into the right end of the front sleeve 30, the sleeve pipe 1 in the front sleeve 30 is tightly held, and the connection of the threaded joint 11 to the sleeve pipe 1 is enhanced; at the same time, the tapered section is arranged in the inner cavity of the front sleeve 30, the sealing gasket 33 is connected at the end of the tapered section, the sleeve pipe 1 entering the section is subjected to the tightening force, the sealing gasket 33 has the radial shrinkage force, thereby realizing the sealing of the sleeve pipe 1, and the installation of the sleeve pipe 1 is completed.

[0042] In summary, the technical scheme of the application has the following beneficial effects:

[0043] 1. In the double sleeve joint, the front sleeve is nested and connected with the threaded head, one end of the front sleeve is threadedly connected with the end part of the rear clamping ring, and the other end part of the rear clamping ring is connected with the inner wall of the nut, the rear clamping ring and the front sleeve are tightly held under the tightening of the nut, the soft sealing is increased while the compactness is improved, the elastic deformation of the sealing gasket enhances the sealing property, the high pressure is more reliable, the overall connection structure is stable and reliable, the problem of uneven stress of each part of the sleeve pipe connection and easy structural damage is avoided.

[0044] 2. In the application, the rear clamping ring and the front sleeve are threadedly connected, so that the connection and disconnection of the sleeve pipe and the double sleeve joint are facilitated.

[0045] 3. In the application, the sleeve pipe is connected with the sleeve nut, the sleeve pipe is extruded at the threaded joint port, the nut is screwed and tightened through the thread engagement, the other end of the rear clamping ring is connected into the cylindrical section with the inner thread of the front sleeve through the thread engagement, the rear clamping ring is tightly held by the front sleeve, the connection of the sleeve pipe and the threaded joint is facilitated, and the problem of loosening during the use of the sleeve pipe and the joint body is avoided.

[0046] 4. The installation operation of the sleeve joint of the application is very simple, can be operated only by simple instructions, can reach the same qualified level, and is very efficient.

[0047] 5. In the application, the O-shaped ring of soft sealing is adopted, the requirement for the steel pipe is greatly reduced, the cost is reduced, and the sealing effect of the double sleeve joint is improved.

[0048] The above merely provides exemplary embodiments of the present application, but not for limiting the protection scope of the present application, which is defined by the appended claims.

Claims

1. A double ferrule fitting for plumbing installations, characterized in that, The utility model relates to a kind of threaded joint and valve body, including: Joint body, as a whole, open both ends, hollow cylinder, the joint body includes the valve body of middle part, threaded joint located the valve body two sides, nut is movably connected with the threaded joint, the threaded joint open end is embedded with front sleeve, the inner wall of the one end of the front sleeve is equipped with internal thread, the internal thread is adapted with the external thread of rear snap ring, the rear snap ring one part is connected with the threaded joint inside, another part is embedded in the one end of the nut close to the valve body; Wherein, the one end of the front sleeve close to the valve body is tapered section that contracts inward, the one end of the front sleeve away from the valve body is cylindrical section and is interference fit with the open end of the threaded joint;The tapered section is connected with sealing washer at terminal end; Wherein, the rear snap ring is cylindrical and its one end is interference fit with the one end opening of the nut; Wherein, the nut and threaded joint are tightened by thread engagement, by the inner periphery of the nut abutting the one end of the rear snap ring, the other end of the rear snap ring is threaded into the inner periphery of the internal thread of the front sleeve, causing the one end of the rear snap ring to shrink, so that it tightly holds sleeve pipe, and the connection of sleeve pipe and threaded joint is enhanced.

2. A dual ferrule fitting for use in plumbing installations according to claim 1, wherein, The threaded joint is a tapered threaded joint, and the thread on the threaded joint is left-handed thread.

3. A dual ferrule connector for use in conduit installations according to claim 1, wherein, The joint body is made of stainless steel, and the front sleeve is PTEE front sleeve.

4. A dual ferrule connector for use in conduit installations according to claim 1, wherein, The valve body and the threaded joints on both sides are integrally formed.

5. A dual ferrule connector for use in conduit installations according to claim 1 wherein, The sealing washer is O-shaped rubber ring.

6. A dual ferrule connector for use in conduit installations according to claim 1, wherein, The outer wall of the threaded joint is provided with external thread, and the inner wall of the threaded joint is provided with internal thread, and the threaded joint and the nut are fixed by external thread and internal thread.

7. A dual ferrule connector for use in conduit installations according to claim 1 wherein, The threaded joint is provided with a lubricating layer on the surface.

8. A dual ferrule connector for use in conduit installations according to claim 1 wherein, The diameter of the internal pipeline of the valve body is smaller than the diameter of the internal pipeline of the threaded joint.

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