Natural gas diffusion and nitrogen injection integrated device

Abstract

The utility model provides a natural gas diffusion and nitrogen injection integrated device, which relates to the technical field of natural gas nitrogen injection and diffusion and comprises a branch pipe, a plurality of long threaded sleeves are hinged to the outer wall of the branch pipe close to the top edge, and foot pads are movably mounted on the swing edges of the long threaded sleeves. The position, close to the bottom edge, of the outer surface of the branch pipe is in a threaded shape and is in threaded connection with a threaded ring, the adjustable and telescopic foot pad can be accurately adjusted according to the flatness of different terrains, and the adjustable and telescopic foot pad can be adjusted by adjusting the height and the angle of the support no matter in a bumpy mountain land or a flat site. And the device is kept in a horizontal stable state.

Description

Technical Field

[0001] This utility model relates to the field of natural gas nitrogen injection and venting technology, and in particular to an integrated device for natural gas venting and nitrogen injection. Background Technology

[0002] Nitrogen injection and venting of natural gas are common operations in the process of natural gas processing and transportation. They are mainly used to ensure the safe operation of natural gas systems, prevent the risk of explosion and fire, and replace or discharge natural gas under specific circumstances. Therefore, they require the use of related integrated natural gas venting and nitrogen injection devices.

[0003] Traditional temporary venting devices are mostly supported by fixed brackets, which pose a risk of tipping over in complex environments such as fields, green belts, and hills. Furthermore, after venting, the nitrogen injection device needs to be dismantled and replaced before nitrogen replacement operations can be carried out, causing many inconveniences for front-line workers. Utility Model Content

[0004] The purpose of this utility model is to solve the problems existing in the prior art by proposing an integrated device for natural gas venting and nitrogen injection.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a natural gas venting and nitrogen injection integrated device, comprising a branch pipe, wherein a plurality of long threaded sleeves are hinged to the outer wall of the branch pipe near the top edge, and the long threaded sleeves are movably mounted with pads on their swinging edges; the outer surface of the branch pipe is threaded near the bottom edge and threadedly connected to a threaded ring; a connecting ring is rotatably connected to the top edge of the threaded ring; a short screw is movably mounted on the top edge of the connecting ring directly below the hinge of each long threaded sleeve; a short threaded sleeve is threadedly connected to the surface of the short screw; a swing arm is hinged to the top edge of the outer wall of the short threaded sleeve; one end of the swing arm is hinged to the outer wall of the branch pipe and the other end of the swing arm is rotatably connected to the outer wall of the long threaded sleeve; a venting pipe is installed inside the branch pipe; a steel pipe for connecting a natural gas tank is installed at the bottom end of the venting pipe; and a liquid nitrogen connection port, a nitrogen cylinder quick connector, a thermometer, a pressure gauge, and a flow meter are respectively arranged on the surface of the steel pipe in order from near to far from the branch pipe.

[0006] Preferably, the long threaded sleeve is internally threaded with a long screw, the bottom end of which is spherical and rollably connected to the top edge of the pad, and a ground nail is provided through the edge of the top edge of the pad.

[0007] Preferably, a sealing blind plate is installed at the top of the vent pipe via a quick clamp.

[0008] Preferably, the outer wall of the vent pipe is also threaded and threaded with a nut that overlaps the top of the branch pipe, and the bottom end of the vent pipe is also detachably connected to the steel pipe by a quick clamp.

[0009] Preferably, there are two quick-connectors for the nitrogen cylinder, and both the quick-connectors for the nitrogen cylinder and the liquid nitrogen connection port are equipped with valves.

[0010] Preferably, the flow meter is detachably installed at one end of the steel pipe, and a connecting pipe for connecting to a natural gas tank is installed at the end of the flow meter away from the steel pipe.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0012] 1. In this utility model, by setting a long threaded sleeve, a swing arm, a threaded ring, and a short threaded sleeve, the connecting ring rises and falls on the surface of the branch pipe, which in turn drives the short screw and the short threaded sleeve to rise and fall synchronously. During the rising and falling process, the swing arm will swing up and down, and when the swing arm swings up and down, it will correspondingly drive the long threaded sleeve to swing, which makes it easy to control the distance between the pad and the branch pipe. By utilizing the contact between the pad and the ground, the adjustable and retractable pad can be precisely adjusted according to different terrain flatness. Whether in rugged mountainous areas or relatively flat sites, the device can be kept in a horizontal and stable state by adjusting the height and angle of the support.

[0013] 2. In this utility model, by setting up a liquid nitrogen connection port and a nitrogen cylinder quick connector, the efficient integration of nitrogen injection and venting functions greatly simplifies the operation process and reduces the time for equipment switching and debugging; in addition, the flow meter, temperature gauge and pressure gauge set up to monitor the replacement flow can greatly reduce the replacement cost, and at the same time, the monitoring of nitrogen replacement venting can effectively reduce the risk of asphyxiation during operation. Attached Figure Description

[0014] Figure 1 This utility model provides a three-dimensional structural schematic diagram of an integrated natural gas venting and nitrogen injection device;

[0015] Figure 2 This utility model provides a structural schematic diagram of a branch pipe for an integrated natural gas venting and nitrogen injection device;

[0016] Figure 3 This utility model proposes an integrated device for natural gas venting and nitrogen injection. Figure 2 A schematic diagram of the cross-sectional structure;

[0017] Figure 4 This is a schematic diagram of a sealed blind flange.

[0018] Legend: 1. Steel pipe; 2. Connecting pipe; 3. Flow meter; 4. Pressure gauge; 5. Thermometer; 6. Nitrogen cylinder quick connector; 7. Liquid nitrogen connection port; 8. Long threaded sleeve; 9. Long screw; 10. Foot pad; 11. Branch pipe; 12. Swing arm; 13. Short threaded sleeve; 14. Threaded ring; 15. Short screw; 16. Vent pipe; 17. Nut; 18. Connecting ring; 19. Sealing blind flange; 20. Ground nail. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0021] like Figures 1-4 As shown, an integrated natural gas venting and nitrogen injection device includes a branch pipe 11. Several long threaded sleeves 8 are hinged to the outer wall of the branch pipe 11 near the top edge. A foot 10 is movably mounted on the swing edge of each long threaded sleeve 8. A long screw 9 is threadedly connected to the inner thread of each long threaded sleeve 8. The bottom end of the long screw 9 is spherical and rollably connected to the top edge of the foot 10. A ground nail 20 is inserted through the top edge of the foot 10. When the long threaded sleeves 8 maintain the same opening angle, the long screw 9 inside one of the long threaded sleeves 8 can be independently extended or retracted by rotating it individually. This allows for adjustment of the relative position of the foot 10 at the corresponding position to other foot 10 positions, facilitating use on different rugged or inclined surfaces. After the foot 10 is in contact with the ground, the position of the foot 10 can be further fixed by inserting the ground nail 20 into the ground.

[0022] The outer surface of the branch pipe 11 is threaded near the bottom edge and threadedly connected to a threaded ring 14. A connecting ring 18 is rotatably connected to the top edge of the threaded ring 14. A short screw 15 is movably mounted on the top edge of each long threaded sleeve 8, located directly below its hinge point. A short threaded sleeve 13 is threadedly connected to the surface of the short screw 15. A swing arm 12 is hinged to the top edge of the outer wall of the short threaded sleeve 13. One end of the swing arm 12 is hinged to the outer wall of the branch pipe 11, and the other end is rotatably connected to the outer wall of the long threaded sleeve 8. The long threaded sleeve 8, the short threaded sleeve 13, and the swing arm 12 all swing relative to the branch pipe 11. In use, rotating the threaded ring 14 allows it to rotate relative to the connecting ring 18, causing the connecting ring 18 to rise and fall on the surface of the branch pipe 11. When the connecting ring 18 is raised or lowered, it drives the short screw 15 and the short threaded sleeve 13 to rise and fall synchronously. During the raising and lowering process, because it is hinged to the middle of the surface of the swing arm 12, it will drive the swing arm 12 to swing up and down. When the swing arm 12 swings up and down, it will drive the long threaded sleeve 8 to swing. By controlling the position of the threaded ring 14 on the surface of the branch pipe 11, it is easy to control the opening angle of the long threaded sleeve 8. In addition, the end of the short screw 15 is hinged to the surface of the connecting ring 18 by rotating the connector. This allows the corresponding swing arm 12 to swing up and down independently by rotating the short screw 15 alone, while the position of the connecting ring 18 remains unchanged. Therefore, it is easy to adjust the distance between the pad 10 and the branch pipe 11 according to the terrain.

[0023] Additionally: A vent pipe 16 is installed inside the branch pipe 11. A steel pipe 1 for connecting to a natural gas tank is installed at the bottom of the vent pipe 16. A sealing blind plate 19 is installed at the top of the vent pipe 16 via a quick clamp. After the venting operation is completed, the sealing blind plate 19 is fixed at the venting port at the top of the vent pipe 16 using a quick clamp. The nitrogen injection hose is then inserted into the nitrogen cylinder quick connector 6, which allows for a quick switch to the nitrogen injection operation mode.

[0024] Regarding how to fix the branch pipe 11: The outer wall of the vent pipe 16 is also threaded and threaded with a nut 17 that overlaps the top of the branch pipe 11. The bottom end of the vent pipe 16 is also detachably connected to the steel pipe 1 by a quick clamp. By rotating the nut 17 to adjust its position on the surface of the vent pipe 16, the vent pipe 16 can be inserted into the branch pipe 11 after the branch pipe 11 is fixed in position. The nut 17 is used to overlap the top of the branch pipe 11 to fix the position of the vent pipe 16 and adjust the distance between the bottom end of the vent pipe 16 and the ground.

[0025] Structural description of steel pipe 1: The surface of steel pipe 1 is equipped with, in order of distance from branch pipe 11, a liquid nitrogen connection port 7, a nitrogen cylinder quick connector 6, a thermometer 5, a pressure gauge 4, and a flow meter 3. Two nitrogen cylinder quick connectors 6 are provided, and both the nitrogen cylinder quick connector 6 and the liquid nitrogen connection port 7 are equipped with valves. The flow meter 3 is detachably installed at one end of steel pipe 1, and a connecting pipe 2 for connecting to a natural gas tank is installed at the end of the flow meter 3 furthest from steel pipe 1. The addition of the liquid nitrogen connection port 7 facilitates flexible selection of nitrogen sources in different operating scenarios, greatly improving the applicability and practicality of the device. The flow meter 3 can be a commonly available orifice plate flow meter, used online. The monitoring system allows for real-time observation of flow data, which can be compared and calculated to determine the gas velocity within the pipeline. A nitrogen injection interface is cleverly added to the existing temporary venting device, effectively combining the two systems into one. This significantly improves work efficiency, reduces equipment space requirements, and facilitates management and maintenance by operators. A temperature gauge (5) is added to the existing system to ensure accurate measurement of the nitrogen temperature before it enters the steel-fired pipeline. Real-time monitoring by the temperature gauge allows for timely monitoring of nitrogen temperature changes. If the temperature drops below 5°C, appropriate adjustments can be made immediately, such as increasing the vaporization rate or adjusting operating parameters, to ensure the nitrogen temperature meets requirements.

[0026] In actual use, a static grounding clamp is selected and connected to the static grounding release device on site to release static electricity. The branch pipe 11 is opened and installed in the corresponding area through the long threaded sleeve 8. The vent pipe 16, steel pipe 1 and connecting pipe 2 are installed in sequence. The connecting pipe 2 is used to connect to the natural steel pipe on the surface of the natural gas tank for venting. After the venting operation is completed, the sealing blind plate 19 is fixed at the venting port with a quick clamp, and the nitrogen injection hose is inserted into the nitrogen cylinder quick connector 6 to quickly switch to the nitrogen injection operation mode.

[0027] The wiring diagram of the switching valve in this utility model is common knowledge in the field, and its working principle is a well-known technology. The appropriate model is selected according to actual use. Therefore, the control method and wiring layout of the switching valve will not be explained in detail.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An integrated device for natural gas venting and nitrogen injection, characterized in that: The system includes a branch pipe (11), the outer wall of which is hinged with several long threaded sleeves (8) near the top edge. Each long threaded sleeve (8) has a movably mounted pad (10) on its swing side. The outer surface of the branch pipe (11) near the bottom edge is threaded and threadedly connected to a threaded ring (14). The top edge of the threaded ring (14) is rotatably connected to a connecting ring (18). A short screw (15) is movably mounted on the top edge of the connecting ring (18) directly below the hinge point of each long threaded sleeve (8). A short threaded sleeve (13) is threadedly connected to the surface of the short screw (15). The top edge of the outer wall of the short threaded sleeve (13) is hinged with a swing arm (12). One end of the swing arm (12) is hinged to the outer wall of the branch pipe (11), and the other end of the swing arm (12) is rotatably connected to the outer wall of the long threaded sleeve (8). A vent pipe (16) is installed inside the branch pipe (11). A steel pipe (1) for connecting a natural gas tank is installed at the bottom end of the vent pipe (16). The surface of the steel pipe (1) is provided with a liquid nitrogen connection port (7), a nitrogen cylinder quick connector (6), a thermometer (5), a pressure gauge (4), and a flow meter (3) in order from near to far from the branch pipe (11).

2. The integrated natural gas venting and nitrogen injection device according to claim 1, characterized in that: The long threaded sleeve (8) is internally threaded with a long screw (9). The bottom end of the long screw (9) is spherical and is rolledly connected to the top edge of the pad (10). A ground nail (20) is provided through the top edge of the pad (10).

3. The integrated natural gas venting and nitrogen injection device according to claim 1, characterized in that: A sealing blind plate (19) is installed at the top of the vent pipe (16) via a quick clamp.

4. The integrated natural gas venting and nitrogen injection device according to claim 1, characterized in that: The outer wall of the vent pipe (16) is also threaded and threaded with a nut (17) that overlaps the top of the branch pipe (11). The bottom end of the vent pipe (16) is also detachably connected to the steel pipe (1) by a quick clamp.

5. The integrated natural gas venting and nitrogen injection device according to claim 1, characterized in that: Two quick-connectors (6) for nitrogen cylinders are provided, and valves are provided in both the quick-connectors (6) for nitrogen cylinders and the liquid nitrogen connection port (7).

6. The integrated natural gas venting and nitrogen injection device according to claim 1, characterized in that: The flow meter (3) is detachably installed at one end of the steel pipe (1), and a connecting pipe (2) for connecting to a natural gas tank is installed at the end of the flow meter (3) away from the steel pipe (1).

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