Butt welding opening device for large-diameter pipeline valve and pipeline

Abstract

The invention discloses a large-diameter pipeline valve and pipeline butt welding opening device. The valve comprises a valve body and a pipeline, a connecting ring is fixedly arranged between the valve body and the pipeline, and a reinforcing ring is fixedly installed on the outer circumference of the welding position of the connecting ring and the valve body; the reinforcing ring is provided with an exhaust hole communicated with the welding part; one end of the exhaust hole is communicated with the welding part, and the other end is communicated with atmosphere. The invention has the beneficial effects that the structural design is reasonable, the butt welding port device is arranged between the large-diameter valve and the pipeline, and the connecting ring with a thick-wall structure is matched with the reinforcing ring, so that the connecting requirements of valves with different diameters and pipelines are met; the valve body design of the large-diameter valve is simplified, the current situation of customized single-piece small-batch production of the large-diameter pipeline valve for petrochemical engineering is avoided, universal design and manufacturing are achieved, the production period is effectively shortened, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The present invention relates to a butt welding joint device, in particular to a butt welding joint device for a large-diameter pipeline valve and a pipeline, and belongs to the technical field of petrochemical construction. Background Technology

[0002] With the increase in the processing capacity of the petrochemical industry, the diameter of the pipeline of the newly built device is getting larger and larger, and the diameter of the required supporting valves is also getting larger and larger. Due to the different design parameters during the process design of the device, even if the nominal diameter is the same, the actual inner and outer diameters will be different when designing the pipeline. When the valve is welded to the pipeline, the inner diameter of the valve is required to be basically consistent with the inner diameter of the pipeline, and the outer diameter of the valve must be greater than or equal to the outer diameter of the pipeline to facilitate welding connection. Therefore, valves are generally customized. Customized production of valves has the disadvantages of one-station one-machine design, order production, and long delivery cycle. In order to solve this actual situation, for small-diameter valves with a diameter less than 1000mm, an integral casting valve body is mostly used, with a thick-walled structure, and the welding groove is processed according to actual needs. The integral casting valve body invisibly increases the weight of the valve, increases the load of the pipeline, and increases the cost. With the expansion of chemical plant scale, the valve diameter continues to increase, the pipeline limits the weight of the valve, the difficulty of valve body casting increases, and the custom production of large-diameter valves adopts one-station one-machine design and order production. The existing technology is difficult to meet the manufacturing requirements of large-diameter valve bodies with a diameter greater than 1000mm, and the delivery cycle is long and the cost is high. SUMMARY OF THE INVENTION

[0003] In order to overcome the shortcomings of the existing large-diameter valves, which are one-station-one-machine design and order production, and are difficult to meet the manufacturing requirements of large-diameter valve bodies, have long delivery cycles and high costs, the present invention provides a large-diameter pipeline valve and pipeline butt welding joint device.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a large-diameter pipeline valve and pipeline butt welding joint device, including a valve body and a pipeline, a connecting ring is fixedly arranged between the valve body and the pipeline, and a reinforcing ring is fixedly installed on the outer circumference of the welding point between the connecting ring and the valve body.

[0005] The reinforcement ring is provided with an exhaust hole connected to the welding point.

[0006] One end of the exhaust hole is connected to the welding point, and the other end is connected to the atmosphere.

[0007] Reinforcement ribs are fixedly arranged between the reinforcement rings of the butt-welded joint devices at both ends of the valve body, and more than two reinforcement ribs are evenly distributed along the circumference of the reinforcement rings.

[0008] The reinforcement rings at both ends of the valve body are symmetrically arranged on both sides of the sealing pair of the valve.

[0009] Welding grooves are provided at both ends of the connecting ring.

[0010] The beneficial effects of the present invention are as follows: The structure is reasonably designed. A butt-welding interface device is provided between the large-diameter valve and the pipeline. The connecting ring with a thick-wall structure cooperates with the reinforcing ring to meet the connection requirements of valves and pipelines with different diameters; the design of the valve body of the large-diameter valve is simplified, enabling the large-diameter pipeline valves for petrochemical use to get rid of the current situation of customized single-piece and small-batch production, realizing universal design and manufacturing, effectively shortening the production cycle, and reducing the manufacturing cost. Description of the Drawings

[0011] Figure 1 It is a schematic structural diagram of the butt-welding interface device for the large-diameter pipeline valve and the pipeline of the present invention.

[0012] Figure 2A , 2B , 2C is Figure 1 The partial enlarged view I in

[0013] Figure 3 It is a schematic structural diagram of the embodiment of the present invention.

[0014] In the figure: 1. Valve body, 2. Pipeline, 3. Connecting ring, 4. Reinforcing ring, 5. Welding joint, 6. Exhaust hole, 7. Reinforcing rib, 8. Sealing pair. Detailed Embodiment

[0015] The present invention will be further described below in conjunction with the drawings and embodiments. However, those skilled in the art should be aware that the present invention is not limited to the specific embodiments listed, and as long as it conforms to the spirit of the present invention, it should be included within the protection scope of the present invention.

[0016] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "left", "right", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing or simplifying the description of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0017] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "joined", and "sealed" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, a direct connection, an indirect connection, or an integral connection; it can be a mechanical connection, an indirect connection through an intermediate medium, or a communication inside two components. The sealing can be oil seal, packing seal, or other forms of sealing. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] See the appendix Figure 1 For a butt-welding interface device between a large-diameter pipeline valve and a pipeline of the present invention, it includes a valve body 1 and a pipeline 2. A connecting ring 3 is fixedly arranged between the valve body 1 and the pipeline 2, and a reinforcing ring 4 is fixedly installed on the outer circumference of the welding joint 5 between the connecting ring 3 and the valve body 1. The connecting ring 3 has a thick-wall structure, which can not only meet the mechanical performance design requirements of the valve but also facilitate the connection with valve bodies and pipelines of different diameters. For example, Figure 2A the connecting ring structure when the pipeline diameter shown is smaller than the valve body diameter; Figure 2B the connecting ring structure when the inner diameter of the pipeline shown is the same as the inner diameter of the valve body; Figure 2C the connecting ring structure when the pipeline diameter shown is larger than the valve body diameter.

[0019] In the present invention, the application of the butt-welding interface device is not restricted by the valve form, valve port shape, valve port size, etc. No matter what valve form it is, no matter whether the valve port shape is a circular pipeline interface or a rectangular pipeline interface, as long as the valve port size allows appropriate adjustment and there is space for installing the reinforcing ring, valves connected to the pipeline by welding can be applied.

[0020] Furthermore, the reinforcing ring 4 is provided with exhaust holes 6 communicating with the welding joint 5; one end of the exhaust hole 6 communicates with the welding joint 5, and the other end communicates with the atmosphere. After the valve body 1 and the connecting ring 3 are welded, a cavity will be formed between the welding joint 5 and the reinforcing ring 4. When the valve works under hot conditions, the gas inside the cavity starts to thermally expand, and the hot gas is discharged through the exhaust holes 6, which can prevent damage to the welding structure.

[0021] See the appendix Figure 3 When the difference between the inner diameter and the outer diameter of the reinforcing ring 4 of the butt-welding interface device is large, reinforcing ribs 7 are fixedly arranged between the reinforcing rings 4 at both ends of the valve body 1, and more than two reinforcing ribs 7 are evenly distributed along the circumference of the reinforcing ring 4 to enhance the stability of the butt-welding interface device and the valve operation. The reinforcing ribs 7 can be plate-shaped or ring-shaped.

[0022] Preferably, the reinforcing rings 4 at both ends of the valve body 1 are symmetrically arranged on both sides of the sealing pair 8 of the valve, improving the stability of the valve during the operation of the equipment.

[0023] Furthermore, welding grooves are provided at both ends of the connecting ring 3. Preferably, both ends of the connecting ring 3 are fixedly connected to the valve body 1 and the pipeline 2 by welding. The reinforcing ring 4 is fixedly connected to the connecting ring 3 and the valve body 1 by welding.

[0024] Applying the present invention can also simplify the valve body structure of large-diameter valves, and the valve body is designed as a cylindrical structure.

[0025] In a large-diameter pipeline valve and pipeline butt-welding interface device of the present invention, a thermal expansion prevention structure with exhaust holes is provided in the reinforcing ring, which can prevent the gas in the cavity formed by the welding of the reinforcing ring, the connecting ring and the valve body from expanding under high-temperature working conditions, damaging the welding structure and causing problems with the connection between the valve body and the pipeline.

[0026] Compared with the prior art, for existing pipeline valves used in petrochemical industry, when the diameter is large, only a riveted and welded body structure can be adopted. Restricted by the pipeline load requirements, the wall thickness of the valve body (cylindrical body) is limited, and usually customized production is adopted, with a long design and processing cycle and high cost, making it difficult to meet the short-cycle needs of users. The present invention can design the connection between the valve and the pipeline as a universal structure, and the connecting ring adopts a thick-wall structure, which is designed according to requirements so that it can be welded to the pipeline, realizing the pre-production of valves under the same nominal size. According to actual needs, only the connecting ring and the reinforcing ring need to be processed, getting rid of the passive situation of one-station and one-machine design and manufacturing in the past, greatly shortening the supply cycle, realizing mass production, and effectively reducing the design cost and manufacturing cost.

[0027] The present invention is not only applied to valves on large-diameter pipelines in petrochemical industry, but also can be used for large-diameter pipeline valves used in similar working conditions in other fields.

[0028] It should be noted that the above embodiments are examples rather than limiting the present invention, and those skilled in the art will be able to design many alternative embodiments without departing from the scope of the claims of this patent.

Claims

1. A butt welding joint device for a large-diameter pipeline valve and a pipeline, comprising a valve body and a pipeline, characterized in that: A connecting ring is fixedly arranged between the valve body and the pipeline, and a reinforcing ring is fixedly installed on the outer circumference of the welding point between the connecting ring and the valve body.

2. According to claim 1, the large-diameter pipeline valve and pipeline butt welding joint device is characterized by: The reinforcement ring is provided with an exhaust hole communicated with the welding position.

3. The large-diameter pipeline valve and pipeline butt welding joint device according to claim 2 is characterized by: One end of the exhaust hole is connected to the welding position, and the other end is connected to the atmosphere.

4. The large-diameter pipeline valve and pipeline butt welding joint device according to any one of claims 1 to 3, characterized in that: Reinforcing ribs are fixedly arranged between the reinforcing rings of the butt-welding joint devices at both ends of the valve body, and more than two reinforcing ribs are evenly distributed along the circumference of the reinforcing rings.

5. The large-diameter pipeline valve and pipeline butt welding joint device according to claim 4 is characterized in that: The reinforcing rings at both ends of the valve body are symmetrically arranged on both sides of the sealing pair of the valve.

6. The large-diameter pipeline valve and pipeline butt welding joint device according to claim 5 is characterized by: Both ends of the connecting ring are provided with welding grooves.

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