Natural gas overpressure prevention device
By designing the coordination of regulating pipes, gas collection boxes, and overpressure components, the problem of the lack of overpressure protection in natural gas pipeline systems has been solved, enabling safe pressure relief and collection within natural gas pipelines, thus improving safety and efficiency.
Patent Information
- Application Number
- CN202520639050.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-07
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-04-07
AI Technical Summary
The existing natural gas pipeline system lacks effective overpressure protection devices, which means that when the pressure inside the pipeline is too high, it cannot be released in time, which may lead to an explosion.
A natural gas overpressure prevention device was designed, including a regulating pipe, a gas collecting box, an overpressure component, and a sealing structure. Through the cooperation of gears, racks, and ball screws, the device realizes the depressurization and collection of natural gas. The depressurization pressure is adjusted by a spring, and a pressure gauge is equipped for real-time monitoring.
It enables timely pressure relief and collection within natural gas pipelines, preventing explosions, and can adjust the pressure relief level according to the pipeline's pressure capacity, thus improving safety and efficiency.
Smart Images
Figure CN223854929U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of natural gas pipeline technology, and in particular to a natural gas overpressure prevention device. Background Technology
[0002] A natural gas pipeline system refers to a pipeline that transports natural gas, including associated gas produced from oil fields, from extraction sites or processing plants to urban gas distribution centers or industrial users. It is also known as a gas transmission pipeline. Using natural gas pipelines to transport natural gas is the way to transport large quantities of natural gas on land. Natural gas pipelines account for about half of the total length of pipelines in the world.
[0003] However, some existing natural gas pipeline systems lack suitable overpressure protection devices. When the pressure inside the pipeline becomes too high, it cannot be released in time, which may lead to an explosion of the natural gas pipeline system, which is extremely dangerous. Utility Model Content
[0004] In order to overcome the defects of the prior art mentioned above, the inventors conducted in-depth research and, after a great deal of creative work, completed this utility model.
[0005] Specifically, the technical problem to be solved by this utility model is to provide a natural gas overpressure protection device to address the problem that some existing natural gas pipeline systems do not have suitable overpressure protection devices, and when the pressure inside the pipeline is too high, they cannot be depressurized in time, which may lead to the explosion of the natural gas pipeline system, which is extremely dangerous.
[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:
[0007] A natural gas overpressure prevention device includes a natural gas pipeline with a regulating pipe at its upper end and a vent hole on the upper side of the regulating pipe at its lower end. A gas collecting box is located on one side of the natural gas pipeline. A regulating plate is inserted into the inner wall of the regulating pipe. An overpressure assembly is located between the regulating pipe and the gas collecting box. The overpressure assembly includes a gear on the upper end of the regulating plate, a gear on one side of the gear, a rotating rod at the middle of the gear, and the end of the rotating rod away from the gear passing through the regulating pipe and the gas collecting box and connected to a first bevel gear. A second bevel gear is located on one side of the first bevel gear, and a ball screw is located at the lower end of the second bevel gear. A ball screw sleeve is fitted on the outer wall of the ball screw, and a sealing block is provided on the outer wall of the ball screw sleeve. A spring is located on the upper end of the regulating plate, and a vent pipe is inserted into one end of the outer wall of the regulating pipe.
[0008] As an improved technical solution, a sealing sleeve is fixedly fitted on the outer wall of the gas collecting box, the outer wall of the sealing sleeve is in contact with the inner wall of the regulating pipe, the sealing sleeve is movably inserted into the inner wall of the regulating pipe, and a receiving block is fixedly provided on the inner wall of the regulating pipe at the lower end of the regulating plate.
[0009] As an improved technical solution, a piston plate is movably inserted into the upper end of the inner wall of the regulating tube, a screw is threaded into the upper end of the regulating tube, the lower end of the screw is rotatably connected to the upper end of the piston plate, and the upper and lower ends of the spring are fixedly connected to the piston plate and the regulating plate, respectively.
[0010] As an improved technical solution, the rack and gear mesh with each other, the rotating rod is rotatably connected to the regulating pipe and the outer wall of the air collecting box respectively, the first bevel gear and the second bevel gear mesh with each other, and the lower end of the ball screw is rotatably connected to the inner wall of the bottom end of the air collecting box.
[0011] As an improved technical solution, a sliding rod is fixedly provided in the inner cavity of the gas collection box, and a sliding sleeve is movably sleeved on the outer wall of the sliding rod, and the sliding sleeve and the ball screw sleeve are fixedly connected.
[0012] As an improved technical solution, the end face of the vent pipe away from the air collection box and the inner wall of the regulating pipe are on the same vertical plane, the end face of the vent pipe away from the regulating pipe and the outer wall of the sealing block are on the same vertical plane, and the end face of the vent pipe away from the regulating pipe and the outer wall of the sealing block are in contact.
[0013] As an improved technical solution, an outlet pipe is inserted into the upper end of the gas collecting box, an air valve is provided at the upper end of the outlet pipe, and a pressure gauge is provided on one side of the outer wall of the natural gas pipeline.
[0014] After adopting the above technical solution, the beneficial effects of this utility model are:
[0015] 1. In this utility model, when the natural gas inside the natural gas pipeline is overpressurized, the regulating plate moves upward and the sealing block moves downward, leaving the sealing block away from the vent pipe. When the regulating plate and the sealing sleeve are located at the upper end of the vent pipe, the natural gas in the natural gas pipeline enters the gas collecting box through the vent pipe. The gas collecting box collects the overpressurized natural gas. After the gas in the natural gas pipeline enters the gas collecting box, the pressure in the natural gas pipeline decreases.
[0016] 2. In this utility model, by rotating the screw downwards, the screw drives the piston plate to slide downwards along the inner wall of the regulating pipe and compress the spring, thereby increasing the elastic force of the spring on the regulating plate. A greater pressure is required in the natural gas pipeline to push the regulating plate to release pressure. By rotating the screw upwards, the screw drives the piston plate upwards along the inner wall of the regulating pipe, thereby decreasing the elastic force of the spring on the regulating plate. A smaller pressure is required in the natural gas pipeline to push the regulating plate to release pressure. Thus, reasonable adjustment can be made according to the maximum pressure that the natural gas pipeline can withstand. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:
[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a natural gas overpressure prevention device according to this utility model;
[0019] Figure 2 This is a three-dimensional cross-sectional view of the overall front view of a natural gas overpressure prevention device according to this utility model;
[0020] Figure 3 This is a three-dimensional structural diagram of the overpressure component of a natural gas overpressure prevention device according to this utility model.
[0021] In the diagram: 1. Natural gas pipeline; 2. Regulating pipe; 3. Vent hole; 4. Gas collection box; 5. Regulating plate; 6. Overpressure assembly; 601. Gear rack; 602. Gear; 603. Rotating rod; 604. First bevel gear; 605. Second bevel gear; 606. Ball screw; 607. Ball sleeve; 608. Sealing block; 609. Sliding sleeve; 610. Sliding rod; 7. Piston plate; 8. Screw; 9. Spring; 10. Sealing sleeve; 11. Receiving block; 12. Vent pipe; 13. Gas outlet pipe; 14. Gas valve; 15. Pressure gauge. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0024] Meanwhile, the meaning of "and / or" or "the / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.
[0025] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.
[0026] like Figures 1-3 As shown in the figure, this embodiment provides a natural gas overpressure prevention device, including a natural gas pipeline 1, a regulating pipe 2 at the upper end of the natural gas pipeline 1, a vent 3 on the upper side of the natural gas pipeline 1 located below the regulating pipe 2, a gas collecting box 4 on one side of the natural gas pipeline 1, an regulating plate 5 inserted into the inner wall of the regulating pipe 2, and an overpressure assembly 6 between the regulating pipe 2 and the gas collecting box 4. The overpressure assembly 6 includes a gear 601 located at the upper end of the regulating plate 5, and a gear 602 on one side of the gear 601. A rotating rod 603 is provided in the middle. The end of the rotating rod 603 away from the gear 602 passes through the regulating pipe 2 and the air collection box 4 in sequence and is connected to the first bevel gear 604. A second bevel gear 605 is provided on one side of the first bevel gear 604. A ball screw 606 is provided at the lower end of the second bevel gear 605. A ball screw sleeve 607 is sleeved on the outer wall of the ball screw 606. A sealing block 608 is provided on the outer wall of the ball screw sleeve 607. A spring 9 is provided at the upper end of the regulating plate 5. A vent pipe 12 is inserted into one end of the outer wall of the regulating pipe 2.
[0027] A sealing sleeve 10 is fixedly fitted on the outer wall of the air collection box 4. The outer wall of the sealing sleeve 10 is in contact with the inner wall of the regulating pipe 2. The sealing sleeve 10 is movably inserted into the inner wall of the regulating pipe 2. A receiving block 11 is fixedly provided on the inner wall of the regulating pipe 2 at the lower end of the regulating plate 5.
[0028] A piston plate 7 is movably inserted into the upper end of the inner wall of the regulating tube 2, and a screw 8 is threaded into the upper end of the regulating tube 2. The lower end of the screw 8 is rotatably connected to the upper end of the piston plate 7, and the upper and lower ends of the spring 9 are fixedly connected to the piston plate 7 and the regulating plate 5, respectively.
[0029] The rack 601 and gear 602 mesh with each other, the rotating rod 603 is rotatably connected to the regulating pipe 2 and the outer wall of the air collecting box 4 respectively, the first bevel gear 604 and the second bevel gear 605 mesh with each other, and the lower end of the ball screw 606 is rotatably connected to the inner wall of the bottom end of the air collecting box 4.
[0030] A slide rod 610 is fixedly installed in the inner cavity of the air collection box 4. A slide sleeve 609 is movably sleeved on the outer wall of the slide rod 610. The slide sleeve 609 and the ball screw sleeve 607 are fixedly connected. During the process of the ball screw 606 driving the sealing block 608 to move up and down, the slide sleeve 609 slides up and down along the outer wall of the slide rod 610, which increases the stability of the sealing block 608 during the movement.
[0031] The end face of the vent pipe 12 away from the air collection box 4 and the inner wall of the regulating pipe 2 are on the same vertical plane. The end face of the vent pipe 12 away from the regulating pipe 2 and the outer wall of the sealing block 608 are on the same vertical plane. The end face of the vent pipe 12 away from the regulating pipe 2 and the outer wall of the sealing block 608 are in contact.
[0032] A gas outlet pipe 13 is inserted into the upper end of the gas collection box 4, and a gas valve 14 is installed at the upper end of the gas outlet pipe 13. A pressure gauge 15 is installed on one side of the outer wall of the natural gas pipeline 1.
[0033] When the natural gas inside the natural gas pipeline 1 is overpressurized, and the pressure inside the natural gas pipeline 1 is greater than the elastic force of the spring 9, the natural gas pushes the adjusting plate 5 upward along the inner wall of the adjusting pipe 2 through the vent 3. The adjusting plate 5 compresses the spring 9. During this process, the rack 601 moves upward, driving the gear 602 to rotate. The gear 602 drives the rotating rod 603 to rotate. The rotating rod 603 drives the first bevel gear 604 to rotate. The first bevel gear 604 drives the second bevel gear 605 to rotate. The second bevel gear 605 drives the ball screw 606 to rotate. The ball screw sleeve 607 drives the sealing block 608 to move downward until the sealing block 608 leaves the vent pipe 1. 2. When the adjusting plate 5 and the sealing sleeve 10 are located at the upper end of the vent pipe 12, the natural gas in the natural gas pipeline 1 enters the gas collecting box 4 through the vent pipe 12. The gas collecting box 4 collects the overpressurized natural gas. After the gas in the natural gas pipeline 1 enters the gas collecting box 4, the pressure in the natural gas pipeline 1 decreases. When the thrust of the pressure in the natural gas pipeline 1 is less than the elastic force of the spring 9, under the action of the elastic force of the spring 9, the adjusting plate 5 and the sealing sleeve 10 move downward until they contact the receiving block 11. At this time, the upward thrust and the upward supporting force of the pressure inside the natural gas pipeline 1 on the adjusting plate 5 and the sealing sleeve 10 are equal to the spring force. The spring 9 exerts a downward elastic force, at which point the adjusting plate 5 and the sealing sleeve 10 remain balanced in the adjusting pipe 2. During the pressure release process of natural gas in the natural gas pipeline 1, the toothed rod 601 moves downward and the sealing block 608 moves upward. After the pressure is balanced, the sealing block 608 and the outer wall of the vent pipe 12 are in contact, and the sealing block 608 seals the vent pipe 12, preventing gas in the gas collection box 4 from entering the adjusting pipe 2 through the vent pipe 12. The gas collection box 4 can collect overpressurized natural gas to avoid waste. When the gas valve 14 is opened, the natural gas in the gas collection box 4 can be discharged through the gas outlet pipe 13. The sealing sleeve 10 increases the distance between the natural gas pipeline 1 and the adjusting pipe 2. The sealing between the pipes is ensured. The pressure gauge 15 can display the pressure value inside the natural gas pipeline 1 in real time. By rotating the screw 8 downward, the screw 8 drives the piston plate 7 to slide downward along the inner wall of the regulating pipe 2 and compress the spring 9. As a result, the elastic force of the spring 9 on the regulating plate 5 increases, and a greater pressure is required inside the natural gas pipeline 1 to push the regulating plate 5 to release pressure. By rotating the screw 8 upward, the screw 8 drives the piston plate 7 upward along the inner wall of the regulating pipe 2, and the elastic force of the spring 9 on the regulating plate 5 decreases. A smaller pressure is required inside the natural gas pipeline 1 to push the regulating plate 5 to release pressure. Thus, reasonable adjustment can be made according to the maximum pressure that the natural gas pipeline 1 can withstand.
[0034] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. Furthermore, it should be understood that after reading the technical description of this utility model, those skilled in the art can make various alterations, modifications, and / or variations to this utility model, and all such equivalent forms also fall within the scope of protection defined by the appended claims.
Claims
1. A natural gas overpressure prevention device comprising a natural gas pipeline (1), characterized in that: The upper end of the natural gas pipeline (1) is provided with an adjusting pipe (2), the upper side of the lower end of the natural gas pipeline (1) is provided with a vent hole (3), one side of the natural gas pipeline (1) is provided with a gas collecting box (4), the inner wall of the adjusting pipe (2) is provided with an adjusting plate (5), an overpressure assembly (6) is arranged between the adjusting pipe (2) and the gas collecting box (4), the overpressure assembly (6) comprises a gear rod (601) arranged at the upper end of the adjusting plate (5), one side of the gear rod (601) is provided with a gear (602), the middle end of the gear (602) is provided with a rotating rod (603), one end of the rotating rod (603) away from the gear (602) penetrates the adjusting pipe (2) and the gas collecting box (4) in sequence and is connected with a first bevel gear (604), one side of the first bevel gear (604) is provided with a second bevel gear (605), the lower end of the second bevel gear (605) is provided with a ball screw (606), the outer wall of the ball screw (606) is provided with a ball screw sleeve (607), the outer wall of the ball screw sleeve (607) is provided with a sealing block (608), the upper end of the adjusting plate (5) is provided with a spring (9), one end of the outer wall of the adjusting pipe (2) is provided with an air pipe (12).
2. The overpressure prevention device for natural gas according to claim 1, characterized by: The outer wall of the gas collecting box (4) is fixedly provided with a sealing sleeve (10), the outer wall of the sealing sleeve (10) and the inner wall of the adjusting pipe (2) are attached to each other, the sealing sleeve (10) is movably arranged in the inner wall of the adjusting pipe (2), the inner wall of the adjusting pipe (2) is fixedly provided with a receiving block (11) at the lower end of the adjusting plate (5).
3. The overpressure prevention device for natural gas according to claim 1, characterized by: The upper end of the inner wall of the adjusting pipe (2) is movably provided with a piston plate (7), the upper end of the adjusting pipe (2) is screwedly provided with a screw rod (8), the lower end of the screw rod (8) and the upper end of the piston plate (7) are rotationally connected, the upper end and the lower end of the spring (9) are fixedly connected with the piston plate (7) and the adjusting plate (5) respectively.
4. The overpressure prevention device for natural gas according to claim 1, characterized by: The gear rod (601) and the gear (602) are engaged with each other, the rotating rod (603) is rotationally connected with the outer walls of the adjusting pipe (2) and the gas collecting box (4) respectively, the first bevel gear (604) and the second bevel gear (605) are engaged with each other, and the lower end of the ball screw (606) is rotationally connected with the inner wall of the bottom end of the gas collecting box (4).
5. The overpressure prevention device for natural gas according to claim 1, characterized by: A sliding rod (610) is fixedly arranged in the inner cavity of the gas collecting box (4), the outer wall of the sliding rod (610) is movably provided with a sliding sleeve (609), and the sliding sleeve (609) and the ball screw sleeve (607) are fixedly connected.
6. The overpressure prevention device for natural gas according to claim 1, characterized by: The end face of the air pipe (12) away from the gas collecting box (4) and the inner wall of the adjusting pipe (2) are on the same vertical plane, the end face of the air pipe (12) away from the adjusting pipe (2) and the outer wall of the sealing block (608) are on the same vertical plane, and the end face of the air pipe (12) away from the adjusting pipe (2) and the outer wall of the sealing block (608) are attached to each other.
7. The overpressure prevention device for natural gas according to claim 1, characterized by: The upper end of the gas collecting box (4) is movably provided with an air outlet pipe (13), the upper end of the air outlet pipe (13) is provided with an air valve (14), and one side of the outer wall of the natural gas pipeline (1) is provided with a pressure gauge (15).