Accumulated liquid discharging device of long-distance natural gas conveying pipeline

Abstract

The utility model relates to the technical field of natural gas pipeline accumulated liquid treatment, in particular to an accumulated liquid discharging device of a long-distance natural gas conveying pipeline. The accumulated liquid discharging device of the long-distance natural gas conveying pipeline comprises a connecting pipe connected to the bottom of the natural gas conveying pipeline, the lower end of the connecting pipe is connected with a water collecting box, the top wall of the water collecting box is provided with an inlet hole communicated with the connecting pipe, the bottom wall of the water collecting box is provided with a discharging hole, and the discharging hole is communicated with the connecting pipe. The water collecting box is provided with a valve assembly, and the valve assembly is used for firstly closing the discharging hole and then opening the inlet hole or firstly closing the inlet hole and then opening the discharging hole. The device has the advantages that the structural design is reasonable, accumulated liquid can be collected in the water collecting box in advance when the accumulated liquid is generated in the natural gas pipeline, and the accumulated liquid can be automatically discharged in an air leakage prevention manner without influencing normal gas transmission.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid accumulation treatment in natural gas pipelines, in particular to a device for removing liquid accumulation in long-distance natural gas transmission pipelines. Background Art

[0002] A natural gas pipeline refers to a pipeline that transports natural gas from a mining site or processing plant to a city gas distribution center or an industrial enterprise user. It is also called a gas transmission pipeline. It is a long-distance natural gas transmission pipeline. As natural gas is affected by changes in temperature and pressure during long-distance transportation, water and heavy hydrocarbon components in the natural gas are prone to gas-liquid phase change and precipitate during pipeline transportation. They cannot be completely removed, forming liquid accumulation in low-lying areas of undulating pipelines, resulting in increased pipeline pressure, reduced transportation efficiency, and accelerated pipeline corrosion. In severe cases, it is easy to cause natural gas leakage and other problems. Therefore, long-distance natural gas transmission pipelines must be equipped with liquid removal devices to solve the many problems mentioned above.

[0003] However, it was found during the use of the existing liquid discharge device that when draining the accumulated liquid, personnel are required to first close the transmission pipeline, and then drain the accumulated liquid by opening the valve set at the bottom of the natural gas pipeline. The following shortcomings exist during use: it is not possible to automatically prevent gas leakage and discharge the accumulated liquid without affecting the normal gas transmission. The method of closing the pipeline valve to stop the transmission affects the normal transmission of natural gas, and the convenience of use and the degree of automation are not ideal.

[0004] In view of this, it is necessary to develop a liquid accumulation removal device for a long-distance natural gas transmission pipeline to solve the above-mentioned problems. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a device for removing accumulated liquid from a long-distance natural gas transmission pipeline, which effectively overcomes the defects of the prior art.

[0006] The technical solution of the utility model to solve the above technical problems is as follows:

[0007] A device for removing accumulated liquid from a long-distance natural gas transmission pipeline comprises a connecting pipe connected to the bottom of the natural gas transmission pipeline, the lower end of the connecting pipe is connected to a water collecting box, the top wall of the water collecting box is provided with an inlet hole connected to the connecting pipe, the bottom wall of the water collecting box is provided with a discharge hole, the water collecting box is provided with a valve assembly, and the valve assembly is used to first close the discharge hole and then open the inlet hole, or first close the inlet hole and then open the discharge hole.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, the water collecting box is a horizontally arranged rectangular box, and the inlet holes and the outlet holes are staggered and distributed in the length direction of the water collecting box.

[0010] Furthermore, the valve assembly includes a telescopic device, a connecting rod, a connecting piece, an upper baffle and a lower baffle, the telescopic device is installed at one end of the water collecting box, the discharge hole is close to the other end of the water collecting box, and the discharge hole is located between the inlet hole and one end of the water collecting box in the horizontal direction, one end of the connecting rod is connected to the telescopic device, and the other end extends horizontally toward the other end of the water collecting box, the connecting piece is arranged at the other end of the connecting rod, the upper baffle is horizontally installed at the upper end of the connecting piece, and the lower baffle is horizontally installed at the lower end of the connecting piece, the distance between one end of the upper baffle and the other end of the water collecting box is smaller than the distance between the lower baffle and the other end of the water collecting box, and the telescopic device is used to drive the connecting rod to drive the upper baffle and the lower baffle to telescope and translate synchronously, and make the upper baffle seal, cover or open the inlet hole, and make the lower baffle seal, cover or open the discharge hole.

[0011] Furthermore, an upper sealing portion sealingly contacting the top wall of the water collecting box is disposed on the upper surface of the upper baffle plate, and a lower sealing portion sealingly contacting the bottom wall of the water collecting box is disposed on the lower surface of the lower baffle plate.

[0012] Furthermore, the upper sealing part and the lower sealing part are both rubber pads.

[0013] Furthermore, the telescopic device is an electric push rod, a main body of which is mounted on the outside of one end of the water collecting box, and the telescopic device is connected to a controller.

[0014] Furthermore, it also includes a guide sleeve, which is sleeved outside the connecting rod and one end of which is connected and fixed to one end of the water collecting box.

[0015] Furthermore, a guide groove extending toward both ends of the guide sleeve is provided on the inner bottom wall thereof, a limit switch is provided at the end of the guide groove away from the telescopic device, and a contact block extending into the guide groove is provided at the lower end of the connecting rod close to the telescopic device. When the telescopic device is extended, the contact block moves along the guide groove close to the limit switch, and the limit switch is connected to the controller.

[0016] Furthermore, the guide sleeve is a square tube component, and the connecting rod is a square rod.

[0017] Furthermore, a detachable cover is sealed at one end of the water collecting box.

[0018] The beneficial effects of the utility model are: reasonable structural design, capable of collecting the accumulated liquid in the water collecting box in advance when the accumulated liquid is generated in the natural gas pipeline, and capable of automatically preventing gas leakage and discharging the accumulated liquid without affecting the normal gas transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a device for removing accumulated liquid from a long-distance natural gas transmission pipeline of the utility model;

[0020] Figure 2 The utility model is a structural cross-sectional view of a device for removing accumulated liquid from a long-distance natural gas transmission pipeline.

[0021] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0022] 1. Natural gas transmission pipeline; 2. Connecting pipe; 3. Water collecting box; 31. Inlet hole; 32. Outlet hole; 33. Cover plate; 41. Telescopic device; 42. Connecting rod; 43. Connecting piece; 44. Upper baffle; 45. Lower baffle; 46. Controller; 47. Guide sleeve; 48. Limit switch; 421. Contact block; 441. Upper sealing part; 451. Lower sealing part. DETAILED DESCRIPTION

[0023] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0024] Example: Figure 1 and 2 As shown, the liquid accumulation removal device for the long-distance natural gas transmission pipeline of this embodiment includes a connecting pipe 2 connected to the bottom of the natural gas transmission pipeline 1, the lower end of the connecting pipe 2 is connected to a water collecting box 3, the top wall of the water collecting box 3 is provided with an inlet hole 31 connected to the connecting pipe 2, the bottom wall of the water collecting box 3 is provided with a discharge hole 32, and the water collecting box 3 is provided with a valve assembly, and the valve assembly is used to first close the discharge hole 32 and then open the inlet hole 31, or first close the inlet hole 31 and then open the discharge hole 32.

[0025] The usage process is as follows:

[0026] When liquid accumulates inside the natural gas transmission pipeline 1, the liquid automatically flows downward, and the accumulated liquid will sequentially pass through the connecting pipe 2 and the inlet hole 31, and the accumulated liquid will be collected by the water collecting box 3. When the accumulated liquid needs to be discharged, the valve assembly is operated to first close the inlet hole 31, and then the discharge hole 32 is opened, so that the accumulated liquid can be discharged without affecting the natural gas transmission in the natural gas transmission pipeline 1. When the accumulated liquid does not need to be discharged, the valve assembly is operated to first close the discharge hole 32, and then the inlet hole 31 is opened. The whole device has a reasonable structural design, and can collect the accumulated liquid in the water collecting box in advance when the accumulated liquid occurs in the natural gas pipeline, and can automatically prevent gas leakage and discharge the accumulated liquid without affecting the normal gas transmission.

[0027] In this embodiment, the water collecting box 3 is a horizontally arranged rectangular box, and the inlet holes 31 and the outlet holes 32 are staggered in the length direction of the water collecting box 3 .

[0028] As a preferred embodiment, the valve assembly includes a telescopic device 41, a connecting rod 42, a connecting piece 43, an upper baffle 44 and a lower baffle 45. The telescopic device 41 is installed at one end of the water collecting box 3, the discharge hole 32 is close to the other end of the water collecting box 3, and the discharge hole 32 is located between the inlet hole 31 and one end of the water collecting box 3 in the horizontal direction. One end of the connecting rod 42 is connected to the telescopic device 41, and the other end extends horizontally toward the other end of the water collecting box 3. The connecting piece 43 is arranged at the other end of the connecting rod 42. At one end, the upper baffle plate 44 is horizontally mounted on the upper end of the connecting member 43, and the lower baffle plate 45 is horizontally mounted on the lower end of the connecting member 43. The distance between one end of the upper baffle plate 44 and the other end of the water collecting box 3 is smaller than the distance between the lower baffle plate 45 and the other end of the water collecting box 3. The telescopic device 41 is used to drive the connecting rod 42 to drive the upper baffle plate 44 and the lower baffle plate 45 to telescope and translate synchronously, and to make the upper baffle plate 44 seal and cover or open the above-mentioned inlet hole 31, and to make the lower baffle plate 45 seal and cover or open the above-mentioned outlet hole 32.

[0029] In the above-mentioned implementation scheme, when liquid accumulates inside the natural gas transmission pipeline 1, the accumulated liquid will flow down automatically and will pass through the connecting pipe 2 and the inlet hole 31 in turn. The accumulated liquid will be collected by the water collecting box 3. When the accumulated liquid needs to be discharged, the telescopic device 41 is extended to drive the connecting rod 42 to drive the upper baffle 44 and the lower baffle 45 to move toward the other end of the water collecting box 3 (before moving, the upper baffle 44 does not close the inlet hole 31, and the lower baffle 45 blocks and closes the discharge hole 32). Since the distance between one end of the upper baffle 44 and the other end of the water collecting box 3 is smaller than the distance between the lower baffle 45 and the other end of the water collecting box 3, When the telescopic device 41 is extended, the upper baffle 44 moves to block and close the inlet hole 31 (forming the effect of first blocking the inlet hole 31 and then unblocking the outlet hole 32). After a certain period of time, the lower baffle 45 moves to open the outlet hole 32. When the telescopic device 41 is contracted, the lower baffle 45 first moves horizontally to block and close the outlet hole 32, and then the upper baffle 44 moves horizontally to open the inlet hole 31 (forming the effect of first blocking the outlet hole 32 and then unblocking the inlet hole 31), avoiding the leakage of natural gas caused by the simultaneous opening of the inlet hole 31 and the outlet hole 32. The design is very reasonable, ensuring the good transportation of natural gas inside the natural gas transmission pipeline 1.

[0030] As a preferred embodiment, the upper surface of the upper baffle plate 44 is provided with an upper sealing portion 441 which is in sealing contact with the top wall of the water collecting box 3 , and the lower surface of the lower baffle plate 45 is provided with a lower sealing portion 451 which is in sealing contact with the bottom wall of the water collecting box 3 .

[0031] In the above embodiment, the provision of the upper sealing portion 441 and the lower sealing portion 451 enables the upper baffle plate 44 and the lower baffle plate 45 to have better blocking performance for the inlet hole 31 and the outlet hole 32 .

[0032] In this embodiment, the upper sealing portion 441 and the lower sealing portion 451 are both rubber pads.

[0033] As a preferred embodiment, the telescopic device 41 is an electric push rod, a main body of which is mounted on the outside of one end of the water collecting box 3 , and the telescopic device 41 is connected to a controller 46 .

[0034] In the above implementation scheme, the telescopic device 41 adopts an electric push rod of an adapted model and is configured to be connected to a controller 46 (using a PLC controller). The controller 46 issues instructions to the telescopic device 41, so that the telescopic device 41 extends to discharge the accumulated liquid. After a certain period of discharge, the controller 46 periodically issues instructions to the telescopic device 41 to contract it, thereby re-blocking the discharge hole 32 and opening the inlet hole 31 to continue collecting the accumulated liquid.

[0035] As a preferred embodiment, it further comprises a guide sleeve 47 , which is sleeved outside the connecting rod 42 , and one end of the guide sleeve 47 is connected and fixed to one end of the water collecting box 3 .

[0036] In the above implementation scheme, the design of the guide sleeve 47 can play a certain "straightening" role on the connecting rod 42, ensuring the stable translation of the connecting rod 42, the upper baffle 44 and the lower baffle 45.

[0037] As a preferred embodiment, the inner bottom wall of the guide sleeve 47 is provided with a guide groove extending toward its two ends, a limit switch 48 is provided at the end of the guide groove away from the telescopic device 41, and a contact block 421 extending into the guide groove is provided at the lower end of the end of the connecting rod 42 close to the telescopic device 41. When the telescopic device 41 is extended, the contact block 421 moves along the guide groove close to the limit switch 48, and the limit switch 48 is connected to the controller 46.

[0038] In the above-mentioned implementation scheme, the guide groove, the limit switch 48 and the contact block 421 are designed so that when the telescopic device 41 is extending, after the contact block 421 follows the movement of the connecting rod 42 and lightly touches the limit switch 48, the controller 46 receives the signal and immediately controls the telescopic device 41 to stop. After a certain period of stoppage, the controller 46 intelligently controls the telescopic device 41 to retract and return to its original position, which achieves the purpose of automatically collecting and discharging the accumulated liquid as a whole, without the need for manual operation and control by personnel, saving time and effort, and improving the convenience of use and the degree of automation.

[0039] In this embodiment, the guide sleeve 47 is a square tube component, and the connecting rod 42 is a square rod, which ensures that the connecting rod 42 drives the contact block 421 to translate well to approach or move away from the limit switch 48.

[0040] In this embodiment, a detachable cover plate 33 is sealed at one end of the water collecting box 3 , so that the cover plate 33 can be opened to inspect the inside of the water collecting box 3 .

[0041] Compared with the prior art, the beneficial effects of the utility model are:

[0042] 1) The device for removing accumulated liquid from a long-distance natural gas transmission pipeline of this embodiment can collect the accumulated liquid in the water collecting box 3 in advance when the accumulated liquid occurs in the natural gas pipeline through the cooperation of the connecting pipe 2, the inlet hole 31 and the water collecting box 3;

[0043] 2) The device for removing accumulated liquid from the long-distance natural gas transmission pipeline of the present embodiment, through the cooperation of the telescopic device 41, the upper baffle 44, the lower baffle 45 and the controller 46, can automatically seal the inlet hole 31 first and then unseal the outlet hole 32 to discharge the liquid at a fixed time, and can automatically seal the outlet hole 32 first and then unseal the inlet hole 31 after the liquid is discharged, and the sealing, unsealing and drainage are all automatically performed at the bottom of the natural gas pipeline without affecting the inside thereof, thereby achieving the effect of automatically preventing gas leakage and discharging accumulated liquid without affecting the normal gas transmission, and no manual operation and control by personnel is required, which saves time and effort, and improves the convenience of use and the degree of automation.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0046] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0049] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A device for removing accumulated liquid from a long-distance natural gas transmission pipeline, characterized in that: The invention comprises a connecting pipe (2) connected to the bottom of a natural gas transmission pipeline (1); the lower end of the connecting pipe (2) is connected to a water collecting box (3); the top wall of the water collecting box (3) is provided with an inlet hole (31) communicating with the connecting pipe (2); the bottom wall of the water collecting box (3) is provided with an outlet hole (32); the water collecting box (3) is provided with a valve assembly, and the valve assembly is used to first close the outlet hole (32) and then open the inlet hole (31), or first close the inlet hole (31) and then open the outlet hole (32). The water collecting box (3) is a rectangular box arranged horizontally, the inlet hole (31) and the outlet hole (32) are staggered in the length direction of the water collecting box (3), the valve assembly comprises a telescopic device (41), a connecting rod (42), a connecting piece (43), an upper baffle plate (44) and a lower baffle plate (45), the telescopic device (41) is installed at one end of the water collecting box (3), and the outlet hole (32) is close to the other end of the water collecting box (3). The discharge hole (32) is located between the inlet hole (31) and one end of the water collecting box (3) in the horizontal direction; one end of the connecting rod (42) is connected to the telescopic device (41), and the other end extends horizontally toward the other end of the water collecting box (3); the connecting member (43) is arranged at the other end of the connecting rod (42); the upper baffle (44) is horizontally mounted on the upper end of the connecting member (43); and the lower baffle (45) is horizontally mounted on the lower end of the connecting member (43). The upper baffle (44) and the lower baffle (45) are connected to each other by a telescopic device (41), wherein the distance between one end of the upper baffle (44) and the other end of the water collecting box (3) is smaller than the distance between the lower baffle (45) and the other end of the water collecting box (3), and the telescopic device (41) is used to drive the connecting rod (42) to drive the upper baffle (44) and the lower baffle (45) to synchronously telescope and translate, so that the upper baffle (44) seals and blocks or opens the inlet hole (31), and the lower baffle (45) seals and blocks or opens the outlet hole (32).

2. The device for removing accumulated liquid from a long-distance natural gas transmission pipeline according to claim 1 is characterized in that: The upper surface of the upper baffle plate (44) is provided with an upper sealing portion (441) in sealing contact with the top wall of the water collecting box (3), and the lower surface of the lower baffle plate (45) is provided with a lower sealing portion (451) in sealing contact with the bottom wall of the water collecting box (3).

3. The device for removing accumulated liquid from a long-distance natural gas transmission pipeline according to claim 2 is characterized in that: The upper sealing portion (441) and the lower sealing portion (451) are both rubber pads.

4. The device for removing accumulated liquid from a long-distance natural gas transmission pipeline according to claim 1 is characterized in that: The telescopic device (41) is an electric push rod, the main body of which is mounted outside one end of the water collecting box (3). The telescopic device (41) is connected to a controller (46).

5. The device for removing accumulated liquid from a long-distance natural gas transmission pipeline according to claim 4 is characterized in that: It also includes a guide sleeve (47), which is sleeved outside the connecting rod (42) and one end of which is connected and fixed to one end of the water collecting box (3).

6. The device for removing accumulated liquid from a long-distance natural gas transmission pipeline according to claim 5, characterized in that: A guide groove extending toward both ends of the guide sleeve (47) is provided on the inner bottom wall thereof, and a limit switch (48) is provided at one end of the guide groove away from the telescopic device (41). A contact block (421) extending into the guide groove is provided at the lower end of one end of the connecting rod (42) close to the telescopic device (41). When the telescopic device (41) is extended, the contact block (421) moves along the guide groove and approaches the limit switch (48), and the limit switch (48) is connected to the controller (46).

7. The device for removing accumulated liquid from a long-distance natural gas transmission pipeline according to claim 6, characterized in that: The guide sleeve (47) is a square tube component, and the connecting rod (42) is a square rod.

8. A device for removing accumulated liquid from a long-distance natural gas transmission pipeline according to any one of claims 1 to 7, characterized in that: A detachable cover plate (33) is sealed at one end of the water collecting box (3).

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