All-plastic large-volume liquid condensing cylinder for conveying coal bed gas

Abstract

The all-plastic large-volume liquid condensing cylinder comprises a cylinder body, a flushing pipe, a liquid discharging pipe and a top-mounted liquid level meter, the cylinder body is connected with the flushing pipe and the liquid discharging pipe, the flushing pipe and the liquid discharging pipe extend into the cylinder body, a liquid collecting branch opening is formed in the side face of the cylinder body, and the liquid collecting branch opening is connected with the top-mounted liquid level meter. And a top-mounted liquid level meter is arranged at the top of the cylinder body and extends into the cylinder body. The main body is formed by welding PE pipes and pipe fittings, the PE materials cannot be corroded, can be buried in the ground for storing water for a long time and are longer in service life, the weight is lighter than that of a steel condensate cylinder, the inner wall of the cylinder body made of the PE materials is smooth, a drain pipe is not prone to being blocked, and the maintenance cost can be reduced. The device and a coal bed gas conveying main pipeline are made of PE materials, electric melting socket connection or hot melting butt joint can be adopted, and construction is convenient and fast; a liquid level meter function and a flushing function are achieved; except for a drain valve, a flush valve, a liquid level meter flange and the like, the main body can be directly buried in the ground.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal bed gas transportation technical field, especially relates to a full plastic large volume condensate cylinder for coal bed gas transportation. BACKGROUND

[0002] Coal bed gas is mostly wet gas when being mined from the well bottom, and liquid water will be condensed in the transportation process with the fluctuation of terrain and the decrease of temperature, and accumulated in the low-lying place of the gas production pipeline, which will reduce the effective transportation area and cause the reduction of gas transmission efficiency, and there is the risk of pipeline freezing in winter when the temperature is relatively low. Therefore, the condensate cylinder is selected to be installed at the appropriate position of the pipeline to discharge the accumulated water regularly.

[0003] Although there is PE condensate cylinder in the PE gas pipeline product, the cylinder volume is not large, and there is no liquid level meter function and flushing function, and the water content of coal bed gas is large, so a large volume condensate cylinder is needed, and therefore the currently used condensate cylinder is mostly made of steel pipe.

[0004] The large steel condensate cylinder has the following shortcomings:

[0005] 1. The cylinder is installed at the low-lying place of the pipeline, buried and stores water, and the inner and outer surfaces of the cylinder body are easy to be corroded, so the service life is short, and the service life of the PE transportation pipeline is 50 years, which is not synchronized, and the cylinder needs to be replaced every few years;

[0006] 2. The cylinder body is made of steel pipe by welding, and the inner and outer surfaces need to be anticorrosive after processing, and the anticorrosive process is complex and inconvenient;

[0007] 3. The internal rust is easy to block the drain pipe, causing poor drainage, so the flange is connected with the blind plate to facilitate disassembly and maintenance, and the flange connection cannot be directly buried, so the cylinder body needs to be lengthened, causing the waste of invalid volume;

[0008] 4. The transportation pipeline is generally PE pipe, and a steel-plastic conversion pipe is needed for conversion, and the welding needs to be anticorrosive on site, which is not convenient for construction. UTILITY MODEL CONTENTS

[0009] In view of the above problems, the utility model aims to provide a full plastic large volume condensate cylinder for coal bed gas transportation, so as to solve the problems of easy corrosion, short service life and inconvenient installation of the steel condensate cylinder.

[0010] The technical problem solved by the utility model can be realized by the following technical scheme: a full plastic large volume condensate cylinder for coal bed gas transportation, which comprises a cylinder body, a flushing pipe, a drain pipe and a top-mounted liquid level meter, the cylinder body is connected with the flushing pipe and the drain pipe, the flushing pipe and the drain pipe extend into the inside of the cylinder body, the side surface of the cylinder body is provided with a liquid collecting branch, the top of the cylinder body is provided with a top-mounted liquid level meter, and the top-mounted liquid level meter extends into the inside of the cylinder body.

[0011] The flushing pipe is installed in the middle of the cylinder body, the lower pipe end of the flushing pipe is beveled at an angle of 45 degrees, and is about 5 cm away from the cylinder bottom, the beveled angle faces the drain pipe, and it is beneficial to periodic filling of high-pressure water for flushing; the drain pipe is installed at the side of the cylinder body, the lower pipe end of the drain pipe is beveled at an angle of 45 degrees, and is about 15 cm away from the cylinder bottom, the upper end of the flushing pipe is provided with a flushing valve, and the upper end of the drain pipe is provided with a drain valve.

[0012] The upper part of the cylinder body is provided with a flushing pipe branch, a drain pipe branch and a liquid level meter branch, the flushing pipe is inserted into the flushing pipe branch, the drain pipe is inserted into the drain pipe branch, and the flushing pipe and the flushing pipe branch, the drain pipe and the drain pipe branch are fixed through electric melting reducers.

[0013] The necks of the flushing pipe branch, the drain pipe branch and the liquid level meter branch are thickened, and the necks are provided with reinforcing ribs.

[0014] The center axis of the liquid collecting branch is about 1.5 m away from the cylinder bottom, the neck of the liquid collecting branch is thickened, the tubular part of the liquid collecting branch is lengthened, and the center axis of the liquid collecting branch is at least 2 m away from the flushing valve and the drain valve.

[0015] The two sides of the top of the cylinder body are provided with lifting lugs, and pipe caps are welded and supported on the outer sides of the lifting lugs.

[0016] The top-mounted liquid level meter comprises a guide pipe, a floating ball and an instrument panel, the floating ball is arranged on the guide pipe, and the upper end of the guide pipe is provided with the instrument panel.

[0017] The upper part of the top-mounted liquid level meter is sleeved with a blind plate with a screw port, and the blind plate is fixedly connected with the liquid level meter branch through a flange.

[0018] The cylinder body is buried underground, the liquid collecting branch is connected with a coal bed gas conveying pipeline through a condensed liquid collecting pipe, and a ball valve is arranged on the condensed liquid collecting pipe.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] 1. The main body is welded by PE material pipes and pipe fittings, the PE material cannot be corroded, can be buried for a long time, has a longer service life, and is more light and convenient than a steel condensed liquid cylinder;

[0021] 2. The inner wall of the PE material cylinder body is smooth, is not easy to be blocked, and the drain pipe is not easy to be blocked, so that the maintenance cost can be reduced;

[0022] 3. The PE material is used for the main pipeline of the coal bed gas conveying pipeline, electric melting socket connection or hot melting butt joint can be adopted, and construction is convenient;

[0023] 4. Liquid level meter function and flushing function are provided;

[0024] 5. The main body can be directly buried, except for the liquid discharge valve, flushing valve and liquid level meter flange which need to be exposed to the ground for operation. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 It is a schematic diagram of the structure of the cylinder body;

[0027] Figure 3 It is a schematic diagram of the structure of the upper end cap with a branch;

[0028] Figure 4 It is a schematic diagram of the structure of the neck with a branch and a reinforcing rib;

[0029] Figure 5 It is a schematic diagram of the structure of the liquid collection branch;

[0030] Figure 6 It is a schematic diagram of the structure of the lifting lug;

[0031] Figure 7 It is a schematic diagram of the installation structure of the flushing pipe and the liquid discharge pipe;

[0032] Figure 8 It is a schematic diagram of the installation structure of the top-mounted liquid level meter;

[0033] Figure 9 It is a schematic diagram of the installation and use of the utility model;

[0034] In the figure: 1, cylinder body; 2, flushing pipe; 3, liquid discharge pipe; 4, top-mounted liquid level meter; 5, ball valve; 6, condensate collection pipe; 7, coalbed methane conveying pipe; 8, ground floor; 9, ball valve switch; 11, lower end cap; 12, pipe body; 13, upper end cap; 14, liquid collection branch; 15, lifting lug; 131, flushing pipe branch; 132, liquid discharge pipe branch; 133, liquid level meter branch; 141, neck; 142, tubular part; 151, pipe cap; 152, hot-melt saddle pipe fitting; 21, flushing pipe bevel; 22, electrically fused reducing pipe; 23, above-ground part; 24, steel-plastic conversion pipe; 25, flushing valve; 26, plug; 31, liquid discharge pipe bevel; 35, liquid discharge valve; 41, flange; 42, blind plate; 43, float ball; 44, conduit; 45, instrument panel. DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features, purposes and effects achieved by the utility model easy to understand, the utility model is further described below in combination with specific diagrams.

[0036] In the description of the utility model, it is understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "central", "end", "length", "outer end" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0037] In combination with the drawings Figures 1 to 9 The embodiment discloses a kind of full plastic large-volume condensate cylinder for coal-bed gas transportation, including cylinder body 1, flush pipe 2, drain pipe 3 and top-mounted liquid level meter 4, the cylinder body 1 is connected with flush pipe 2 and drain pipe 3, flush pipe 2 and drain pipe 3 are inserted into the inside of cylinder body 1, the side of the cylinder body 1 is provided with liquid collection branch 14, the top of the cylinder body 1 is provided with top-mounted liquid level meter 4, and top-mounted liquid level meter 4 is inserted into the inside of cylinder body 1.

[0038] Cylinder body 1 adopts PE material, and the cylinder body 1 includes the upper end cap 13 with branch, pipe body 12 and lower end cap 11, which are all PE materials and are fixed by hot melting welding, the upper end cap 13 is provided with flush pipe branch 131, drain pipe branch 132 and liquid level meter branch 133, the three branches are integrally formed with the upper end cap 13, the flush pipe branch 131 and the drain pipe branch 132 are dn63 branches, and the liquid level meter branch 133 is a dn110 branch.

[0039] The cylinder body 1 is provided with flush pipe branch 131, drain pipe branch 132 and liquid level meter branch 133 in the upper portion, the pipe diameter dn50 of flush pipe 2 and drain pipe 3 is less than the inner diameter of dn63 branch, the flush pipe 2 is inserted into flush pipe branch 131, the drain pipe 3 is inserted into drain pipe branch 132, and the flush pipe 2 and flush pipe branch 131, drain pipe 3 and drain pipe branch 132 are fixed by electric melting variable-diameter pipe 22.The neck of flush pipe branch 131, drain pipe branch 132 and liquid level meter branch 133 is thickened, and the neck is provided with reinforcing ribs for reinforcement to reduce the risk of being broken.

[0040] The liquid collecting branch 14 is hot-melt saddle welded on the side of the cylinder body 1, and the internal diameter is punched on the cylinder body 1. The center axis of the liquid collecting branch 14 is about 1.5 m from the cylinder bottom, so as to ensure that the effective liquid storage volume of the cylinder body is greater than 400 L. The neck 141 of the liquid collecting branch 14 is thickened to reduce the probability of being broken. The tubular part 142 of the liquid collecting branch 14 is lengthened to increase the first fault tolerance and allow twice electric melting welding. The center axis of the liquid collecting branch 14 is at least 2 m from the flushing valve and the liquid discharge valve, so as to ensure that the branch is lower than the PE conveying pipeline with a buried depth of 1.5 m, and the dn110 condensate collecting pipe 6 needs to be installed in a slope to facilitate the gravity collection of the condensate. The coal bed gas condensate liquid water is collected by gravity and flows into the cylinder body 1 from the liquid collecting branch 14.

[0041] The two sides of the top of the cylinder body 1 are provided with lifting lugs 15. During construction, lifting belts can be bound on the two lifting lugs 15 to be lifted and placed into a working pit. The outer side of the lifting lug 15 (i.e. the hot-melt saddle pipe fitting 152) is welded with a socket to have a pipe cap 151, so as to form a step and prevent the lifting belt from slipping off.

[0042] The flushing pipe 2 is installed in the middle of the cylinder body. The lower pipe end 21 of the flushing pipe 2 is provided with a 45-degree bevel 21, which is about 5 cm from the cylinder bottom and faces the liquid discharge pipe 3, so as to facilitate the periodic filling of high-pressure water for flushing. The liquid discharge pipe 3 is installed on the side of the cylinder body. The lower pipe end 31 of the liquid discharge pipe 3 is provided with a 45-degree bevel 31, which is about 15 cm from the cylinder bottom. The upper end of the flushing pipe 2 is provided with a flushing valve 25, and the upper end of the liquid discharge pipe 3 is provided with a liquid discharge valve 35.

[0043] The upper ends of the flushing pipe 2 and the liquid discharge pipe 3 are connected with gas special copper valves through steel-plastic conversion pipe fittings 24. The flushing valve 25 and the liquid discharge valve 35 are provided with plugs 26 to prevent foreign matters from falling in. The valves are normally closed. When liquid discharge or flushing is needed, the valves are opened and the plugs 26 are unscrewed. In order to ensure the buried depth requirement of the cylinder body 1, the upper ends of the flushing pipe 2 and the liquid discharge pipe 3 need to be lengthened by a length 23 after being out of the cylinder body. If the flushing valve 25, the liquid discharge valve 35 and the connected steel-plastic conversion pipe fittings 24 are damaged, they can be sawed off and welded again.

[0044] The top-mounted liquid level meter 4 includes a guide pipe 44, a floating ball 43 and an instrument panel 45. The floating ball 43 is arranged on the guide pipe 44. The upper end of the guide pipe 44 is provided with the instrument panel 45, so as to facilitate reading from the wellhead.

[0045] The upper part of the top-mounted liquid level meter 4 is sleeved with a blind plate 42 with a screw port. The blind plate 42 is fixedly connected with the liquid level meter branch 133 through a flange 41. The floating ball 43 and the guide pipe 44 are made of stainless steel and can resist the corrosion of the condensate liquid water within a certain time. The stroke of the floating ball 43 is that the lowest end (about 20 cm) is slightly higher than the suction of the liquid discharge pipe 3, and the highest end is slightly higher than the upper part of the liquid collecting branch 14.

[0046] When installing the top-mounted liquid level meter 4, the liquid level meter support 133 on the upper part of the cylinder body needs to be lengthened and then a flange head 41 (with a loose flange piece) is welded, the liquid level meter is installed with a float ball 43, a blind plate 42 with a screw port Rc1 / 2 is sleeved, the end of the float ball 43 is inserted into the liquid level meter support 133, the flange piece is connected with the blind plate 42 with the screw port Rc1 / 2 by using a bolt, and a rubber sealing gasket is added in the middle.

[0047] The liquid level meter support 133 adopts a dn110 support (the inner diameter is about 90mm), which has the following advantages: ① the OD89 float ball can pass through, installation is convenient, and a new liquid level meter can be replaced at any time; ② one hand can be inserted into the liquid level meter support 133, and tools can be inserted into the liquid level meter support 133 for maintenance.

[0048] The cylinder body 1 is buried underground, the liquid collecting support 14 is connected with the coalbed methane conveying pipeline 7 through the condensed liquid collecting pipe 6, and the ball valve 5 is arranged on the condensed liquid collecting pipe 6.

[0049] The construction and installation process of the utility model is as follows:

[0050] 1. When constructing, the lifting belt is hung on the two side lifting lugs and is placed into the dug well pit;

[0051] 2. The liquid collecting support 14 is re-welded with a PE ball valve, PE pipe material and PE elbow (electric melting socket welding or hot melting butt joint can be adopted), and is connected with the coalbed methane conveying pipeline 7; when connecting, a certain slope needs to be designed, so that the liquid can flow to the cylinder under the action of gravity;

[0052] 3. The lengthened rod of the ball valve switch 9 is additionally provided with a protective sleeve pipe to the ground, and then backfilling is carried out; except that the flush valve 25, the liquid discharge valve 35, the instrument panel 45 (and the flange) of the liquid level meter and the PE ball valve switch 9 need to be exposed to the backfilling surface, the rest are all buried underground;

[0053] 4. A valve pool is additionally built on the upper part, a cover plate is additionally installed, and protection (solar protection, dust prevention, collision prevention and the like) is carried out.

[0054] When normally operating and using:

[0055] 1. When the coalbed methane conveying pipeline 7 normally conveys, the PE ball valve 5 is always open, and the flush valve 25 and the liquid discharge valve 35 are always closed; 2. When a specified time or a specified liquid level is reached, liquid discharge or flushing needs to be carried out; 3. Before liquid discharge and flushing, the ball valve 5 is closed, the plug 26 is unscrewed, the liquid discharge valve 35 and the flush valve 25 are opened, and attention needs to be paid to making corresponding preparations to prevent spraying and the like; 4. Then liquid discharge and flushing are carried out.

[0056] The main body is welded by pipe material and pipe fittings of PE material, the PE material cannot be corroded, can be buried for long time, has longer service life, and is lighter than the steel condensate cylinder; the inner wall of the cylinder body of the PE material is smooth, is not easy to be blocked, the drain pipe is not easy to be blocked, and the maintenance cost can be reduced; the main body and the coal bed gas conveying pipeline are of PE material, can be connected by electric melting socket or hot melting butt joint, and is convenient to construct; has liquid level meter function and flushing function; only the drain valve, the flushing valve and the liquid level meter flange need to be exposed to the ground for operation, and the main body can be directly buried.

[0057] The above is only a preferred embodiment of the present application, and does not limit the present application in any form, and any simple modification, equivalent change or modification made to the above embodiment according to the technical principle of the present application still belongs to the scope of the technical scheme of the present application.

Claims

1. A full-plastic large-volume condensate cylinder for coal-bed gas transportation, comprising a cylinder body (1), a flushing pipe (2), a liquid discharge pipe (3) and a top-mounted liquid level gauge (4), characterized in that: The cylinder (1) is connected with a flushing pipe (2) and a liquid discharge pipe (3), the flushing pipe (2) and the liquid discharge pipe (3) extend into the inside of the cylinder (1), the side of the cylinder (1) is provided with a liquid collecting branch (14), and the top of the cylinder (1) is provided with a top-mounted liquid level meter (4) extending into the inside of the cylinder (1).

2. A full plastic large volume condensate cylinder for coal bed gas transportation as claimed in claim 1, wherein: The flushing pipe (2) is installed in the middle of the cylinder, the lower pipe end (21) of the flushing pipe (2) is provided with an oblique cut, and the oblique cut is about 5 cm away from the bottom of the cylinder and faces the liquid discharge pipe (3), so that the flushing pipe (2) is beneficial to being filled with high-pressure water for periodic flushing; the liquid discharge pipe (3) is installed on the side of the cylinder, the lower pipe end (31) of the liquid discharge pipe (3) is provided with an oblique cut, and the oblique cut is about 15 cm away from the bottom of the cylinder, the upper end of the flushing pipe (2) is provided with a flushing valve (25), and the upper end of the liquid discharge pipe (3) is provided with a liquid discharge valve (35).

3. The all-plastic large-volume condensate cylinder for coal-bed gas transportation according to claim 1, characterized in that: The upper part of the cylinder (1) is provided with a flushing pipe branch (131), a liquid discharge pipe branch (132) and a liquid level meter branch (133), the flushing pipe (2) is inserted into the flushing pipe branch (131), the liquid discharge pipe (3) is inserted into the liquid discharge pipe branch (132), and the flushing pipe (2) and the flushing pipe branch (131) and the liquid discharge pipe (3) and the liquid discharge pipe branch (132) are fixed through electric melting variable-diameter pipes (22).

4. A full plastic large volume condensate cylinder for coal bed gas transportation as claimed in claim 3, wherein: The necks of the flushing pipe branch (131), the liquid discharge pipe branch (132) and the liquid level meter branch (133) are thickened, and the necks are provided with reinforcing ribs.

5. The all-plastic large-volume condensate cylinder for coal-bed gas transportation according to claim 1, characterized in that: The center axis of the liquid collecting branch (14) is about 1.5 m away from the bottom of the cylinder, the neck (141) of the liquid collecting branch (14) is thickened, the tubular part (142) of the liquid collecting branch (14) is lengthened, and the center axis of the liquid collecting branch (14) is at least 2 m away from the flushing valve and the liquid discharge valve.

6. A full plastic large volume condensate cylinder for coal bed gas transportation as claimed in claim 1, wherein: The two sides of the top of the cylinder (1) are provided with lifting lugs (15).

7. A full plastic large volume condensate cylinder for coal bed gas transportation as claimed in claim 6, wherein: The outer sides of the lifting lugs (15) are welded with pipe caps (151).

8. A full plastic large volume condensate cylinder for coal bed gas transportation as claimed in claim 1, wherein: The top-mounted liquid level meter (4) comprises a guide pipe (44), a floating ball (43) and an instrument panel (45), the floating ball (43) is arranged on the guide pipe (44), and the upper end of the guide pipe (44) is provided with the instrument panel (45).

9. A full plastic large volume condensate cylinder for coal bed gas transportation as claimed in claim 8, wherein: The upper part of the top-mounted liquid level meter (4) is sleeved with a blind plate (42) with a screw port, and the blind plate (42) is fixedly connected with the liquid level meter branch (133) through a flange (41).

10. The all-plastic large-volume condensate cylinder for coal-bed gas transportation according to claim 1, characterized in that: The cylinder (1) is buried underground, the liquid collecting branch (14) is connected with a coalbed methane conveying pipeline (7) through a condensed liquid collecting pipe (6), and the condensed liquid collecting pipe (6) is provided with a ball valve (5).

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