Long-distance pipeline purging device and purging method

Abstract

The present invention relates to the technical field of pipeline purging, and discloses a long-distance pipeline purging device and a purging method. The long-distance pipeline purging device comprises: a purge valve, with flanges on both sides that can be connected to the pipeline to be purged, a steel platform at the lower end, upright frames on the left and right sides of the steel platform, pulleys on the top of each upright frame, and two upper and lower sheaves on the upper switch of the purge valve. One end of two traction ropes are respectively wound around the sheaves in opposite directions, and the other end is extended to the ground after passing through the pulleys; a purge head, which is bent, with a flange on one end that can be connected to the pipeline to be purged and a target plate detachably connected to the other end; and a flange connecting pipe that can be flange-connected to the flow meter, valve, and compensator on the pipeline to be purged. The device is installed on the purging section. After purging is completed, the device is removed and installed on the subsequent purging section to continue purging. This process is repeated to safely and efficiently purge all the pipelines to be purged.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline purging, and in particular to a long-distance pipeline purging device and a purging method. Background Art

[0002] After installation, pipelines transporting explosive gases are prone to residual welding slag, impurities, oil, and particles. If these remain uncleaned, combustion and explosion accidents can easily occur during gas transport. Therefore, cleaning and purging, the final and most critical step in pipeline construction, is particularly important.

[0003] The traditional explosive purging method installs a bursting disc at the end of the pipeline when purging long-distance pipelines. When the bursting disc breaks through at the critical point of air pressure, it generates a large noise and uncontrollable shock wave and impact load, which will create a large risk factor for areas near the purging point, such as special office and production areas within the factory where smoke, vibration and dust are prohibited, as well as special areas such as river crossings, ring roads and villages. Summary of the Invention

[0004] The present invention is made to solve the above technical problems, and its purpose is to provide a long-distance pipeline purging device and purging method, which is easy to install, use and disassemble, and the purging process is safe and efficient.

[0005] In order to achieve the above-mentioned objectives, in the first aspect, the present invention provides a long-distance pipeline purging device, comprising: a purge valve, with flanges on both sides thereof that can be connected to the pipeline to be purged, a steel platform at the lower end, upright frames on the left and right sides of the steel platform respectively, pulleys at the tops of the two upright frames, and an upper and lower sheaves are provided on the switch at the upper end of the purge valve, one end of two traction ropes are respectively wound around the sheaves in opposite directions, and the other end extends to the ground after passing through the pulleys; a purge head, which is bent, with a flange on one end that can be connected to the pipeline to be purged, and a target plate detachably connected to the other end; a flange connecting pipe, which can be flange-connected to the flow meter, valve, and compensator on the pipeline to be purged.

[0006] Preferably, an adjustable support frame is provided below the bend of the pipe to be purged; the adjustable support frame comprises: four inner columns, four hollow outer columns and a rectangular frame; the rectangular frame is composed of four rectangular beams, each of which is provided with a first long through hole in the middle, and two adjacent beams are connected by bolts passing through the first through hole; the upper end of the outer column is fixedly connected to the bottom of the rectangular frame, and a second long through hole is provided in the middle; the lower end of the inner column is fixedly provided, and the upper end is inserted into the outer column and is detachably connected to the outer column.

[0007] Preferably, a buffer plate is provided at the position where the crossbeam abuts against the bend of the pipe to be purged.

[0008] Preferably, connecting plates are provided on both sides of the end of the purge head, connecting rods are detachably provided between the connecting plates, and the target plate is sleeved on the connecting rods.

[0009] In order to achieve the above-mentioned purpose, in a second aspect, the present invention provides a long-distance pipeline purging method, which adopts the long-distance pipeline purging device as described above, including: S1, dividing the pipeline to be purged into two or more purging sections from near to far; S2, installing a purge valve on the first purging section, and installing a purge head at the end of the first purging section; S3, injecting high-pressure purge gas into the purge section, and after the accumulated pressure reaches a preset value, opening the purge valve for purging, and then closing the purge valve; S4, repeating step S3 for a total of 2-15 times, and then installing a target plate at the end of the purge head, and continuing to repeat step S3 until there is no new rust and particle points on the target plate; S5, removing the purge valve and purge head and replacing them with a flange connecting pipe; S6, installing the removed purge valve and purge head in subsequent purge sections in sequence, and repeating steps S3-S5 until all the pipelines to be purged are completed.

[0010] Preferably, in step S3, when opening the purge valve, the traction rope on one side is pulled downward and the traction rope on the other side is loosened; when closing the purge valve, the opposite operation is performed.

[0011] Preferably, in step S4, connecting plates are provided on both sides of the end of the purge head, the target plate is inserted between the connecting plates via a connecting rod, and both ends of the connecting rod are fixed to the connecting plates via nuts.

[0012] According to the above description and practice, the long-distance pipeline purging device described in the present invention is used to purge the pipeline from near to far by installing the purge valve on the purge section and the purge head at the end of the purge section. Specifically, after high-pressure air is injected into the purge section and the pressure is accumulated to a preset value, the purge valve is opened for purging, and then the purge valve is closed. The purge is repeated 2-15 times, and then a target plate is installed at the end of the purge head to continue purging so that the operator can check whether the purge operation of the purge section is qualified. If there are no new rust and particle points on the target plate, the purge of the purge section is completed. At this time, the purge valve and the purge head are removed and replaced with a flange connecting pipe to connect the pipeline. The whole process is safe and efficient, and the device has a simple structure, is easy and quick to install and use, can save working time, and improve work quality. In addition, the device can be disassembled and recycled, which can reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1This is a diagram showing the arrangement positions of the purge valve and the purge head when a long-distance pipeline involved in one embodiment of the present invention is divided into five purge sections for purge.

[0014] Figure 2 The figure is a schematic structural diagram of a purge valve in a long-distance pipeline purge device according to an embodiment of the present invention.

[0015] Figure 3 The figure is a schematic top view of the structure of a purge valve in a long-distance pipeline purge device involved in one embodiment of the present invention.

[0016] Figure 4 for Figure 3 Schematic diagram of the structure of the AA section.

[0017] Figure 5 The figure is a schematic structural diagram of a purge head and a flange connecting pipe in a long-distance pipeline purge device according to an embodiment of the present invention.

[0018] Figure 6 The figure is a schematic structural diagram of an adjustable support frame in a long-distance pipeline purging device according to an embodiment of the present invention.

[0019] Figure 7 for Figure 6 Schematic diagram of the structure of the CC section.

[0020] The reference numerals in the figures are:

[0021] 1. Pipeline to be purged; 2. Purge valve; 21. Pull; 22. Towing rope; 3. Steel platform; 31. Stand; 32. Pulley; 4. Purge head; 41. Target plate; 42. Connecting plate; 43. Connecting rod; 44. Nut; 5. Flange connecting pipe; 6. Adjustable support frame; 61. Inner column; 62. Outer column; 631. Crossbeam; 632. First through hole; 64. Bolt; 7. Flange; 8. Purge gas source; 9. Gas end; 10. Falling chain. DETAILED DESCRIPTION

[0022] The exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0023] In addition, the accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and their repeated description will be omitted. It should be noted that in the present disclosure, the terms "including", "configured with", and "set on" are used to express open-ended inclusion and mean that in addition to the listed elements / components / etc., there may be additional elements / components / etc.; the terms "first", "second", etc. are used only as labels and are not intended to limit the number or order of their objects; the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention.

[0024] Unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0025] In this embodiment, a long-distance pipeline purging device is provided, which is installed on the purging section of the pipeline to be purged. An operator purifies the pipeline to be purged by controlling the opening and closing of the purging valve.

[0026] Figure 1 It shows the positions of the purge valves and purge heads when the long-distance pipeline is divided into five purge sections from the gas supply end to the gas consumption end; Figure 2 The structure of the purge valve in the long-distance pipeline purge device is shown; Figure 3 The top view of the purge valve in the long-distance pipeline purge device is shown; Figure 4 Shown Figure 3 Structure of the middle AA section; Figure 5 The structure of the purge head and flange connection pipe in the long-distance pipeline purge device is shown; Figure 6 The structure of the adjustable support frame in the long-distance pipeline purge device is shown; Figure 7 Shown Figure 6 Structure of the mid-CC section.

[0027] Please refer to Figures 1 to 7The long-distance pipeline purging device in this embodiment is installed on the purging section of the pipeline to be purged 1, and includes a purge valve 2, a purge head 4, and a flange connection pipe 5. Flanges 7 that can be connected to the pipeline to be purged 1 are provided on both the left and right sides of the purge valve 2, and a steel platform 3 is provided at the lower end. By connecting the purge valve 2 to the flanges of the pipelines to be purged 1 on the left and right sides, the purge valve 2 can be installed on the purging section of the pipeline to be purged 1. Two upper and lower sleeves 21 are provided on the switch at the upper end of the purge valve 2. In this embodiment, the upper and lower sleeves 21 are cut and welded from flat steel and round steel, as shown in FIG. Figure 3 and Figure 4 As shown, the upper and lower sides of the sleeve 21 are horizontally arranged and annular flat steel, the outer periphery is vertically arranged and annular flat steel, and the inside is four cross-shaped evenly distributed round steels, and then the winch drum principle is used, such as Figure 2 and Figure 3 As shown, one end of the two traction ropes 22 is wound around the above-mentioned sheaves 21 in opposite directions. At the same time, upright frames 31 are respectively provided on the left and right sides of the steel platform 3. The two upright frames 31 are located in the direction in which the two traction ropes 22 extend outward. Pulleys 32 are provided on the tops of the two upright frames 31. The other ends of the two traction ropes 22 extend downward to the ground after winding around the pulleys 32. The horizontal traction force exerted on the two sheaves 21 can be converted into downward traction force through the two upright frames 31 and the pulleys 32 on their tops. When in use, the staff pulls the traction rope 22 on the ground to drive the sheave 21 to rotate, thereby controlling the opening or closing of the purge valve 2, avoiding the staff from frequently going up and down the platform during the pipeline purge process, and making the operation process safer and more efficient.

[0028] In addition, the purge head 4 is bent, and one end of it is provided with a flange 7 that can be connected to the pipeline 1 to be purged. When in use, one end of the purge head 4 is flange-connected to the pipeline 1 to be purged, and can be purged upward or at other angles, making the operation more flexible and controllable. A target plate 41 can also be detachably connected to the other end of the purge head 4, through which the operator can conveniently check whether the pipeline has been purged. In addition, in order to prevent debris in the pipeline from damaging the equipment during the purging process, a flange connecting pipe 5 is also provided in this embodiment, which can be flange-connected to the flow meter, valve, and compensator position on the pipeline 1 to be purged, which can ensure that the purging process is faster and more convenient. After the purging operation of this purging section is completed, the purge valve 2 and the purge head 4 are disassembled, and the flange connecting pipe 5 is replaced to connect the pipeline 1 to be purged, avoiding the quality problems caused by traditional restoration methods such as cutting and welding and the problem of improper cleaning of welding slag. The disassembled purge valve 2 and purge head 4 can be installed in the next purge section for purge of the next purge section. The operation process is safe and efficient, and the device can be recycled, which can save costs.

[0029] In this embodiment, an adjustable support frame 6 is provided below the bend of the pipeline 1 to be purged. The adjustable support frame 6 includes four inner columns 61, four hollow outer columns 62 and a rectangular frame. Specifically, Figure 6 As shown, the rectangular frame is composed of four rectangular crossbeams 631. Each of the four crossbeams 631 has a first, elongated through-hole 632 in the middle. Adjacent crossbeams 631 are connected by bolts 64 inserted into the first through-holes 632. During use, operators can adjust the fixing range of the rectangular frame based on the specific specifications and dimensions of the pipeline 1 to be purged on site, so as to firmly secure the bend of the pipeline 1 to be purged and avoid safety hazards to the pipeline 1 due to impact loads or vibrations generated during purging. In addition, in this embodiment, a buffer plate is provided at the location where the crossbeams 631 abut the bend of the pipeline 1 to be purged. During pipeline purging or back-purging, the buffer plate can cushion the impact loads or vibrations on the pipeline 1 to be purged, preventing damage to the pipeline 1 due to direct impact with the rectangular frame.

[0030] In this embodiment, the pipeline to be purged 1 is an overhead pipeline, and four inner columns 61 and four hollow outer columns 62 are provided at the bottom of the rectangular frame for support. The upper end of the outer column 62 is fixedly connected to the bottom of the rectangular frame, and a second long through hole is provided in the middle. The lower end of the inner column 61 is fixedly set, and the upper end is inserted into the outer column 62 and detachably connected to the outer column 62. During use, the operator can adjust the inner column 61 and the outer column 62 up and down according to the specific height of the pipeline to be purged 1 on site. After adjusting to the appropriate height, the inner column 61 and the outer column 62 can be fixed with bolts 64. The operation is simple and flexible, and it can also save time and improve work efficiency. In other embodiments, other connection methods can also be used to achieve the above effects.

[0031] After the purge section is repeatedly purged, a target plate 41 needs to be installed at the end of the purge head 4 to check whether the purge section is purged clean. Figure 5 As shown, in this embodiment, connecting plates 42 are provided on both sides of the end of the purge head 4. A connecting rod 43 is detachably provided between the two connecting plates 42. The target plate 41 is sleeved on the connecting rod 43, making installation simple. After repeatedly purging the purge section, the operator can connect the target plate 41 between the two connecting plates 42 using the connecting rod 43 and continue purging the purge section. When no new rust or particle spots are left on the target plate 41, the purge section is complete.

[0032] In this embodiment, the connecting plates 42 can be connected to both ends of the purge head 4 by welding. During the purge process, the stability of the target plate 41 when subjected to force can be ensured, without affecting the normal use of the target plate 41. The connecting rod 43 can be connected to the connecting plates 42 on both sides by bolts 64. While ensuring the stability of the target plate 41 during use, it is also convenient for later disassembly and recycling. It can not only ensure the smooth completion of the purge operation, but also save time and cost and improve work efficiency. In other embodiments, other connection methods can be used between the connecting plates 42, the purge head 4, and the target plate 41 to achieve the above-mentioned effects.

[0033] In addition, in this embodiment, when the long-distance pipeline purging device is used to purge the pipeline 1 to be purged, the following steps are included:

[0034] Step S1: Divide the pipeline 1 to be purged into two or more purging sections from near to far.

[0035] Specifically in this embodiment, the pipeline 1 to be purged between the gas plant and the rod plant is an overhead pipeline with a long line and a complex route. During actual purging, five purging sections are set up, and a segmented pressure accumulation purging method is adopted, which can better ensure the quality and efficiency of pipeline purging over long distances and in complex environments, and ensure that the purging operation is safer and more controllable.

[0036] Step S2: Install the purge valve 2 on the first purge section, and install the purge head 4 at the end of the first purge section. Flanges 7 are located on both sides of the purge valve 2, and a steel platform 3 is located at the lower end. The purge valve 2 is connected to the purge section pipeline via the flanges 7 on both sides, and the lower end is connected to the steel platform 3. A flange 7 is also located at one end of the purge head 4, which allows it to be connected to the end of the purge section. The purge head 4 is curved, allowing it to purge upward or at other angles, making the operation more flexible and controllable.

[0037] Step S3: Inject high-pressure purge gas into the purge section. After the accumulated pressure reaches a preset value, open the purge valve 2 to purge, then close the purge valve 2. After installing the purge valve 2 and purge head 4, inject high-pressure purge gas from the purge gas source 8 of the gas plant into the purge section and accumulate the pressure. After the pressure reaches the preset value, open the purge valve 2 and cooperate with the purge head 4 to purge the purge section. After the purge is completed, close the purge valve 2.

[0038] Step S4: Repeat step S3 2-15 times, then install the target plate 41 at the end of the purge head 4, and continue to repeat step S3 until there are no new rust or particle points on the target plate 41. After purging once, continue to accumulate pressure to the preset value, then open the purge valve 2 again and cooperate with the purge head 4 to purge, then close the purge valve 2, and repeat the purge 2-15 times. Then install the target plate 41 at the end of the purge head 4, open the purge valve 2 and continue purge, and use the target plate 41 to check whether the purge section is completed. If there are no new rust or particle points on the target plate 41, it proves that the purge section has been purged clean.

[0039] Step S5: Remove the purge valve 2 and purge head 4 and replace them with the flanged connecting pipe 5. After the purge operation of the first purge section is completed, the purge valve 2 and purge head 4 can be removed and replaced with the flanged connecting pipe 5 to connect the pipelines of the first purge section. This eliminates the need for welding and ensures clean pipelines. The operation is also simpler, more time-saving, and more efficient.

[0040] Step S6: Install the removed purge valves 2 and purge heads 4 sequentially to the subsequent purge sections, and repeat steps S3-S5 until the entire pipeline 1 to be purged is completely purged. Install the purge valves 2 and purge heads 4 removed from the first purge section sequentially to the subsequent purge sections, and then repeat the purge steps of the first purge section until the gas consumption end 9 at the end of the bar mill area is reached, thus completing the purge of the entire pipeline 1 to be purged.

[0041] In step S3, to open the purge valve 2, one side of the traction rope 22 is pulled downward, while the other side of the traction rope 22 is relaxed. To close the purge valve 2, the reverse operation is performed. In this embodiment, a fall chain 10 can be hung at the end of the traction rope 22. By pulling the fall chain 10 on one side, the traction rope 22 is driven downward, thereby driving the pulley 21 connected to the traction rope 22 to rotate, while keeping the other side of the traction rope 22 relaxed, the purge valve 2 can be opened. The reverse operation can be performed to close the purge valve 2, making the operation more convenient and labor-saving.

[0042] In step S4, connecting plates 42 are further provided on both sides of the end of the purge head 4. The target plate 41 is inserted between the connecting plates 42 via connecting rods 43, and the ends of the connecting rods 43 are fixed to the connecting plates 42 via nuts 44. In this embodiment, the target plate 41 is connected to the connecting plates 42 on both sides via the connecting rods 43 and the nuts 44 at their ends, ensuring flexibility and convenience in installation, use, and removal of the target plate 41. At the same time, the connecting plates 42 are fixed to both sides of the end of the purge head 4, which can also ensure the stability of the target plate 41 when subjected to force during the purge process, thereby ensuring the safety and efficiency of the purge operation.

[0043] When using this long-distance pipeline purging device to purge the pipeline 1 to be purged, the pipeline 1 to be purged is first divided into two or more purging sections from near to far, and then a purge valve 2 and a purge head 4 are installed on the purging sections. The operator controls the opening and closing of the purge valve 2 and cooperates with the purge head 4 and the target plate 41 at its end to purge the pipeline and check whether it has been purged clean. The entire process is simple to operate, safe and efficient. The device can also be recycled, saving manpower and costs. After purging a purging section, the operator removes the purge valve 2 and purge head 4 on the purging section and replaces the flange connecting pipe 5 to restore the pipeline to connectivity. The removed purge valve 2 and purge head 4 are sequentially installed on the subsequent purging section to continue purging, and the process is repeated until the entire pipeline 1 to be purged is purged. In addition, the adjustable support frame 6 is provided below the bend of the pipeline 1 to be purged, and can be flexibly adjusted according to the actual needs of the on-site environment. The structure is simple and easy to operate, and is suitable for similar scenarios.

[0044] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A long distance pipeline purging device, characterized in that: include: The purge valve is provided with flanges on both sides that can be connected to the pipe to be purged, and a steel platform is provided at the lower end. Vertical frames are provided on the left and right sides of the steel platform, and pulleys are provided on the tops of the two vertical frames. The switch at the upper end of the purge valve is provided with upper and lower pulleys. One end of two traction ropes are respectively wound around the pulleys in opposite directions, and the other end extends to the ground after passing through the pulleys. Pulling and controlling the traction ropes drives the pulleys to rotate, thereby controlling the opening or closing of the purge valve; The purge head is bent, with a flange at one end that can be connected to the pipe to be purged, and a target plate detachably connected to the other end; The flange connection pipe can be flange-connected to the flow meter, valve, and compensator on the pipeline to be purged.

2. The long-distance pipeline purging device according to claim 1, characterized in that: An adjustable support frame is provided below the bend of the pipeline to be purged; The adjustable support frame includes: four inner columns, four hollow outer columns and a rectangular frame; the rectangular frame is composed of four rectangular beams, each of which is provided with a long first through hole in the middle of the beams, and two adjacent beams are connected by bolts passing through the first through hole; the upper end of the outer column is fixedly connected to the bottom of the rectangular frame, and a long second through hole is provided in the middle; the lower end of the inner column is fixedly set, and the upper end is inserted into the outer column and is detachably connected to the outer column.

3. The long-distance pipeline purging device according to claim 2, characterized in that: A buffer plate is provided at a position where the crossbeam abuts against the bent portion of the pipeline to be purged.

4. The long-distance pipeline purging device according to claim 1, characterized in that: Connecting plates are provided on both sides of the end of the purge head, connecting rods are detachably provided between the connecting plates, and the target plate is sleeved on the connecting rods.

5. A long-distance pipeline purging method, using the long-distance pipeline purging device according to any one of claims 1 to 4, characterized in that: The steps include: S1. Divide the pipeline to be purged into two or more purging sections from near to far; S2. Install a purge valve on the first purge section and a purge head at the end of the first purge section; S3, inject high-pressure purge gas into the purge section, and when the accumulated pressure reaches the preset value, open the purge valve to purge, and then close the purge valve; S4. Repeat step S3 2-15 times, then install the target plate at the end of the purge head, and continue to repeat step S3 until there are no new rust and particle points on the target plate; S5. Remove the purge valve and purge head and replace them with flange connection pipes; S6. Install the disassembled purge valves and purge heads in sequence to the subsequent purge sections, and repeat steps S3-S5 until all the pipelines to be purged are purged.

6. The long-distance pipeline purging method according to claim 5, characterized in that: In step S3, when opening the purge valve, one side of the traction rope is pulled downward and the other side of the traction rope is loosened; when closing the purge valve, the opposite operation is performed.

7. The long-distance pipeline purging method according to claim 5, characterized in that: In step S4, connecting plates are provided on both sides of the end of the purge head, the target plate is inserted between the connecting plates through a connecting rod, and both ends of the connecting rod are fixed to the connecting plates through nuts.

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