A gas pipeline connection device

Abstract

This utility model relates to the field of connecting device technology, and in particular to a gas pipeline connecting device. Its technical solution includes a gas pipe, a collar, a positioning cylinder, and a positioning rod. A flange is provided at one end of the gas pipe, and a collar is fitted onto the outside of the flange. A C-shaped connecting rod is provided at one end of the collar, and a positioning cylinder is provided on one side of the connecting rod. Ball bearings arranged in a circular array and rolling against the outer wall of the gas pipe are rotatably installed on the inner wall of the collar. A positioning rod is slidably installed inside the positioning cylinder, and a locking block is provided at one end of the positioning rod. A spring fitted onto the outside of the positioning rod is provided between the positioning ring and a support ring. A guide rail slidably installed inside a slide block is provided at the upper end of the positioning rod. This utility model, by fitting a rotatable collar onto the outside of the gas pipe, and with the connecting rod and positioning cylinder connected to the outer wall of the collar fitted onto the outer wall of the fixed pipeline flange, provides support and assists in the positioning and installation of the pipeline.

Description

Technical Field

[0001] This utility model relates to the field of connection device technology, and in particular to a gas pipeline connection device. Background Technology

[0002] Gas pipelines are specialized pipeline systems used to transport natural gas, liquefied petroleum gas, manufactured gas, and other gaseous gases. They are one of the core infrastructures for urban energy supply. Their main function is to safely and stably transport gas from gas fields, storage and distribution stations, and gate stations to industrial users, commercial users, or residential households to meet their energy needs for production and daily life. According to the transmission pressure, gas pipelines can be divided into high-pressure, sub-high-pressure, medium-pressure, and low-pressure pipelines. According to the material, common types include seamless steel pipes, welded steel pipes, polyethylene pipes, and cast iron pipes. Among them, steel pipes and PE pipes are currently the mainstream materials due to their high strength and good corrosion resistance.

[0003] Gas pipeline connections must meet three core requirements: sealing, strength, and corrosion resistance. Different materials and scenarios require different connection methods. Welding flanges to both ends of the pipeline and securing them with bolts, along with gaskets, is suitable for frequently disassembled parts, such as valve-to-pipe connections. However, its sealing performance is slightly lower than welding. Large-diameter or long pipelines are heavy and difficult to support stably manually or with simple machinery, easily saging due to gravity. If temporary supports such as tripods or slings are used during construction, improper positioning can cause the pipeline to shift due to its own weight, such as differences in height at both ends or lateral tilt, leading to misalignment of the ports and additional installation work for the gas pipes. Therefore, we propose a gas pipeline connection device to solve these existing problems. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a gas pipeline connection device.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a gas pipeline connection device, comprising a gas pipe, a collar, a positioning cylinder and a positioning rod, wherein a flange is provided at one end of the gas pipe, a collar is sleeved on the outside of the flange, a C-shaped connecting rod is provided at one end of the collar, and a positioning cylinder is provided on one side of the connecting rod.

[0006] Preferably, the inner wall of the collar is rotatably fitted with balls arranged in a ring array that roll against the outer wall of the gas pipe. The rolling contact between the collar and the outer wall of the gas pipe via the balls reduces rotational resistance and friction.

[0007] Preferably, a positioning rod is slidably installed inside the positioning cylinder, and a locking block is provided at one end of the positioning rod. An anti-slip sleeve is fitted onto the outer wall of the positioning cylinder. The anti-slip sleeve increases the friction when the positioning sleeve contacts the flange. The positioning rod is an extension of the positioning cylinder and is fitted onto the back of the mating flange through the locking block, increasing the support force after the flange contacts.

[0008] Preferably, one end of the connecting rod is provided with a rotating seat, and one end of the positioning cylinder is rotatably installed inside the rotating seat. The positioning cylinder receives rotatable support at one end of the connecting rod through the rotating seat, which facilitates the rotation of the locking block through the mating flange, and after passing through the flange, it rotates to fit against the back of the flange, participating in the force-bearing of the gas pipe installation.

[0009] Preferably, a positioning ring is provided at one end of the positioning rod, a support ring is provided on the inner wall of the opening of the positioning cylinder, and a slide is provided at the upper end of the positioning cylinder. The positioning ring and the support ring provide support for the spring, and the slide provides sliding support for the guide rail.

[0010] Preferably, a spring is provided between the positioning ring and the support ring, sleeved on the outside of the positioning rod and located inside the positioning cylinder, and a guide rail is provided at the upper end of the positioning rod, slidably mounted inside the slide block. The positioning rod slides inside the slide block via the guide rail, preventing the rotational force of the positioning rod from acting on the spring, and allowing it to act directly on the positioning cylinder.

[0011] Preferably, the flange has equidistantly distributed mounting holes inside, and a bolt with one end threadedly fitted with a nut is inserted into each mounting hole. The flange is used to connect parts through the mounting holes and is secured with bolts.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. In the gas pipeline connection of this utility model, the pipeline flange ends are connected, and a collar is sleeved on the outside of the pipeline. The collar is directly connected to the connecting rod. Two sets of rotatable connecting rods drive the collar to rotate. The connecting rods are clamped to the outer wall of the flange that fixes the pipeline through the positioning cylinder. The two sets of connecting rods are evenly stressed, requiring only support for the pipeline. The pipeline can be adjusted by rotating the collar, providing auxiliary support for the gas pipeline connection and assisting in the flange connection during gas pipeline installation. The mounting structure fixes the position of the pipeline, offsetting some of the sagging or tilting caused by its own weight, keeping the connection port horizontal or coaxial, reducing the pressure of manual support. No multiple people are required to manually support it; two people can fine-tune the position through the mounting structure, shortening the connection adjustment time and improving the installation efficiency of the gas pipeline. Attached Figure Description

[0014] Figure 1 This is a side view of the first angle of the three-dimensional structure of this utility model;

[0015] Figure 2 This is a side view of the second angle of the three-dimensional structure of this utility model;

[0016] Figure 3 This is a side view of the three-dimensional structure of the collar of this utility model;

[0017] Figure 4 This is a front-view three-dimensional structural diagram of the connecting rod of this utility model;

[0018] Figure 5 This is a three-dimensional cross-sectional view of the positioning cylinder of this utility model.

[0019] Reference numerals in the attached diagram: 1. Gas pipe; 2. Flange; 3. Connecting rod; 4. Collar; 5. Ball bearing; 6. Locking block; 7. Positioning cylinder; 8. Rotating seat; 9. Guide rail; 10. Slide seat; 11. Positioning rod; 12. Spring; 13. Support ring; 14. Positioning ring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figures 1-5 As shown, the present invention proposes a gas pipeline connection device, including a gas pipe 1, a collar 4, a positioning cylinder 7 and a positioning rod 11. A flange 2 is provided at one end of the gas pipe 1, and a collar 4 is sleeved on the outside of the flange 2. A C-shaped connecting rod 3 is provided at one end of the collar 4, and a positioning cylinder 7 is provided on one side of the connecting rod 3.

[0022] The inner wall of the collar 4 is rotatably fitted with balls 5 arranged in a ring array and rolling against the outer wall of the gas pipe 1;

[0023] A positioning rod 11 is slidably installed inside the positioning cylinder 7. A locking block 6 is provided at one end of the positioning rod 11. An anti-slip sleeve is fitted onto the outer wall of the positioning cylinder 7.

[0024] One end of the connecting rod 3 is provided with a rotating seat 8, and one end of the positioning cylinder 7 is rotatably installed inside the rotating seat 8;

[0025] A positioning ring 14 is provided at one end of the positioning rod 11, a support ring 13 is provided on the inner wall of the opening of the positioning cylinder 7, and a slide block 10 is provided at the upper end of the positioning cylinder 7.

[0026] A spring 12 is provided between the positioning ring 14 and the support ring 13, which is sleeved on the outside of the positioning rod 11 and located inside the positioning cylinder 7. A guide rail 9 is provided at the upper end of the positioning rod 11 and slidably installed inside the slide block 10.

[0027] Flange 2 has equally spaced mounting holes inside, and a bolt with one end threaded by a nut is inserted into each mounting hole.

[0028] Based on the implementation steps of Example 1: The collar 4 is made of ductile iron, possessing high strength and good toughness, capable of withstanding the radial pressure of the gas pipe 1. The balls 5 are made of 440C stainless steel, exhibiting excellent wear resistance, and are chrome-plated to enhance rust prevention. The collar 4, through the rolling contact of the annular array of balls 5 with the outer wall of the gas pipe 1, transforms traditional sliding friction into rolling friction, reducing the coefficient of friction and significantly decreasing the resistance during the rotation of the collar 4. This allows operators to easily adjust the circumferential angle of the gas pipe 1, ensuring precise alignment of the mounting holes on the flange 2. Simultaneously, the line contact design between the balls 5 and the outer wall of the gas pipe 1 disperses the pressure of the collar 4 on the pipe, preventing deformation of the pipe's outer wall due to excessive localized stress. The connecting rod 3 is made of high-strength alloy steel pipe and is fixed to the collar 4 by welding. The rotating seat 8 is made of cast steel and has a brass bushing embedded inside to reduce wear during rotation. The opening angle of the C-type connecting rod 3 can be adapted to the flange 2. Its two ends are rigidly connected to the collar 4 and the rotating seat 8 respectively, forming a stable triangular support structure. This distributes the weight of the gas pipe 1 to the positioning cylinder 7 and the clamping block 6. The rotating seat 8 allows the positioning cylinder 7 to rotate freely, so that the clamping block 6 can be flexibly fastened to the back of the connecting flange 2. This ensures that the support force is always transmitted along the axial direction of the flange 2 during the pipe connection process, avoiding misalignment of the flange 2 due to force offset.

[0029] The positioning cylinder 7 is a seamless steel pipe with a precision-machined inner wall, giving it good rigidity and wear resistance. The spring 12 is made of 60Si2Mn high-strength spring 12 steel. The positioning rod 11 and the positioning cylinder 7 are fitted together to ensure that the positioning rod 11 can slide smoothly along the axial direction, which can accommodate flanges 2 of different thicknesses. The spring 12 is always in a compressed state, providing continuous thrust to the positioning rod 11, so that the locking block 6 fits tightly against the back of the mating flange 2, forming an elastic preload, which effectively counteracts the downward force generated by the weight of the gas pipe 1. When the two flanges 2 are mated, the buffering effect of the spring 12 can absorb the slight axial vibration of the pipeline and avoid deformation of the flange 2 caused by hard collision. The locking block 6 is made of high manganese steel casting with wear-resistant alloy overlay on the surface. The side in contact with the flange 2 is machined with serrated texture. The anti-slip sleeve is made of nitrile rubber and is fixed to the outer wall of the positioning cylinder 7 through a vulcanization process.

[0030] The serrated texture of the locking block 6 increases the friction with the back of the flange 2, improving the coefficient of friction and preventing the locking block 6 from slipping due to pipe vibration during the docking process. The anti-slip sleeve increases the friction of the operator's hand when holding the positioning cylinder 7, avoiding slippage due to sweaty or oily hands and improving operational safety. At the same time, the width of the locking block 6 is 1.2 times the thickness of the flange 2, ensuring a certain percentage of its contact area with the flange 2, dispersing contact stress, and preventing dents from forming on the back of the flange 2 due to excessive local stress. The guide rail 9 is made of 40Cr steel with quenching treatment and chrome plating. The slide block 10 is made of aluminum alloy with a polytetrafluoroethylene slider embedded inside. The sliding fit between the guide rail 9 and the slide block 10 can limit the circumferential rotation of the positioning rod 11, ensuring that the locking block 6 always stays in contact with the back of the flange 2, and preventing the locking block 6 from shifting due to the rotation of the positioning rod 11. At the same time, the self-lubricating properties of the polytetrafluoroethylene slider can reduce the resistance when the guide rail 9 slides, making the extension and retraction of the positioning rod 11 smoother and extending its service life.

[0031] The flange 2 sealing surface adopts a raised face. The raised face design of flange 2, in conjunction with the rubber gasket, can achieve initial sealing through the pre-tightening force of the bolts, meeting the sealing requirements of medium and high pressure gas pipeline 1, ensuring that the rigidity of flange 2 connection remains unchanged when the pipeline operating pressure fluctuates, and avoiding gas leakage caused by bolt loosening. The force-bearing system is composed of collar 4, connecting rod 3 and positioning cylinder 7.

[0032] When the gas pipe 1 to be connected approaches the flange 2 of the fixed pipe at the flange 2 end, the collar 4 slides along the outer wall of the gas pipe 1 to the outside of the flange 2 via the ball bearing 5. Utilizing the opening characteristic of the C-shaped connecting rod 3, it encircles the upper edge of the flange 2. At this time, the rotating seat 8 drives the positioning cylinder 7 to rotate, causing the locking block 6 to engage with the back of the fixed pipe flange 2. Under the preload of the spring 12, the positioning rod 11 extends axially along the positioning cylinder 7, forming a rigid contact with the serrated pattern on the back of the flange 2 through the locking block 6. This transfers the weight of the pipe to be connected through the gas pipe 1, collar 4, connecting rod 3, positioning cylinder 7, positioning rod 11, and locking block 7. The force transmission path of block 6 is distributed to the flange 2 of the fixed pipeline to counteract the downward force generated by the pipeline due to its own weight. When there is a circumferential angular deviation between the two flanges 2, the operator pushes the collar 4 and the ball 5 rolls along the outer wall of the gas pipe 1, causing the collar 4 and the connecting rod 3 to rotate, so that the mounting hole of the flange 2 to be connected is aligned with the fixed flange 2. If there is an axial position deviation, the positioning rod 11 can slide along the positioning cylinder 7, and the gap is compensated by the elastic extension and contraction of the spring 12. At the same time, the rotating seat 8 allows the positioning cylinder 7 to make a fine adjustment of the angle to ensure that the locking block 6 is always in contact with the back of the flange 2, so as to avoid the deformation of the flange 2 caused by the offset of the support force.

[0033] After alignment, the bolts pass through the mounting holes of the two flanges 2, and the axial preload is generated by tightening the nuts, so that the sealing surface of the flange 2 is tightly fitted with the nitrile rubber gasket to form an initial seal. During this process, the buffering effect of the spring 12 can absorb the instantaneous impact force during tightening, and the rolling cooperation of the collar 4 and the ball 5 prevents the pipeline from twisting due to the torque generated by the bolt tightening, ensuring that the pressure on the sealing surface is evenly distributed, and finally achieving a leak-free connection. Through the low-friction rotation of the collar 4 and the ball 5, and the precise guidance of the positioning rod 11 and the guide rail 9, the misalignment problem caused by unstable manual support is solved. At the same time, the anti-slip design of the clamp 6 and the preload of the spring 12 ensure that there is no risk of the pipeline slipping during the docking process. Only two operators are needed to complete the operation, which reduces the manpower input compared with the traditional method and reduces the probability of work-related injuries in high-altitude or confined space operations.

[0034] The pressure uniformity of the flange 2 sealing surface is improved. All structural components are made of high-strength wear-resistant materials, which extends the service life compared to temporary support devices. The single-interface docking time is reduced. The design of C-type connecting rod 3 and telescopic positioning rod 11 eliminates the need to change tools for different pipelines, reducing equipment investment costs. The device is pre-installed, easy to carry, and suitable for various construction scenarios such as overhead, underground, and indoor.

[0035] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A gas pipeline connection device, comprising a gas pipe (1), a collar (4), a positioning cylinder (7), and a positioning rod (11), characterized in that: The gas pipe (1) is provided with a flange (2) at one end, and a collar (4) is sleeved on the outside of the flange (2). A C-shaped connecting rod (3) is provided at one end of the collar (4), and a positioning cylinder (7) is provided on one side of the connecting rod (3).

2. A gas pipeline connection device according to claim 1, characterized in that: The inner wall of the collar (4) is rotatably fitted with balls (5) arranged in a ring array and rolling against the outer wall of the gas pipe (1).

3. A gas pipeline connection device according to claim 1, characterized in that: A positioning rod (11) is slidably installed inside the positioning cylinder (7). A locking block (6) is provided at one end of the positioning rod (11). An anti-slip sleeve is fitted onto the outer wall of the positioning cylinder (7).

4. A gas pipeline connection device according to claim 1, characterized in that: One end of the connecting rod (3) is provided with a rotating seat (8), and one end of the positioning cylinder (7) is rotatably installed inside the rotating seat (8).

5. A gas pipeline connection device according to claim 1, characterized in that: A positioning ring (14) is provided at one end of the positioning rod (11), a support ring (13) is provided on the inner wall of the opening of the positioning cylinder (7), and a slide (10) is provided at the upper end of the positioning cylinder (7).

6. A gas pipeline connection device according to claim 5, characterized in that: A spring (12) is provided between the positioning ring (14) and the support ring (13), which is sleeved on the outside of the positioning rod (11) and located inside the positioning cylinder (7). A guide rail (9) is provided at the upper end of the positioning rod (11) and slidably installed inside the slide block (10).

7. A gas pipeline connection device according to claim 1, characterized in that: The flange (2) has equally spaced mounting holes inside, and a bolt with one end threaded by a nut is inserted into the mounting hole.

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