Intelligent leaking stoppage and cutting-off integrated natural gas pipeline safety device

Abstract

The invention discloses an intelligent leaking stoppage and cutting-off integrated natural gas pipeline safety device which is applied to a downstream pipeline and an upstream pipeline and comprises a connecting flange, an electromagnetic control valve, a natural gas detector, a leaking stoppage assembly, a driving assembly and control equipment. And the natural gas detector is arranged near the connecting flange. By means of the design of the electromagnetic control valve, the natural gas detector, the leaking stoppage assembly, the driving assembly and the control equipment, fuel gas at the joint of the downstream pipeline and the upstream pipeline is monitored through the natural gas detector, and when leakage occurs, the control equipment can control the hydraulic device to push the leaking stoppage assembly to shield the connecting flange and stop leakage; when the downstream pipeline and the upstream pipeline continuously leak, the control equipment controls the electromagnetic control valve to be closed, and further leakage of the natural gas is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of natural gas transmission equipment, and in particular to a natural gas pipeline safety device that integrates intelligent leak plugging and shutoff. Background Art

[0002] After natural gas is mined, it needs to be transported over long distances using pipelines. When transporting natural gas over long distances, multiple pipelines need to be connected. Usually, adjacent natural gas pipelines are connected using flange connections.

[0003] During the transmission of natural gas, there are cases of natural gas leakage at the flange connection parts. Therefore, workers often need to perform leak detection on the flange connection parts to ensure the safety of pipeline transmission. However, natural gas is transmitted over long distances, and some pipelines are located in the field. It takes a lot of time for workers to detect multiple pipeline connection points in the field. Even if a pipeline leak is found, it takes a lot of time for maintenance personnel to reach the leak point, resulting in a large amount of natural gas leakage. Summary of the Invention

[0004] The purpose of the present invention is to provide an intelligent natural gas pipeline safety device that integrates leak plugging and shutoff to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an intelligent integrated leak plugging and shut-off natural gas pipeline safety device, which is applied to downstream pipelines and upstream pipelines, and a connecting flange is provided at the opposite end of the downstream pipeline and the upstream pipeline, and the connecting flange is used to connect the downstream pipeline and the upstream pipeline; its special feature is that it includes: an electromagnetic control valve, a natural gas detector, a leak plugging component, a drive component, and a control device.

[0006] The electromagnetic control valve is arranged at one end of the upstream pipeline away from the downstream pipeline; the natural gas detector is arranged on one side of the connecting flange; the leak-plugging assembly is arranged outside the downstream pipeline; the drive assembly is arranged outside the downstream pipeline, and the drive assembly is used to drive the movement of the leak-plugging assembly; the control device is arranged on one side of the downstream pipeline, and the control device is used to control the electromagnetic control valve, the natural gas detector and the drive assembly.

[0007] Preferably, the upstream pipeline and the opposite end of the electromagnetic control valve are fixedly connected, the input end of the electromagnetic control valve is electrically connected to the output end of the control device, and the output end of the natural gas detector is electrically connected to the input end of the control device.

[0008] Preferably, mounting frames for supporting the downstream pipeline and the upstream pipeline are respectively provided on the outside of the downstream pipeline and the upstream pipeline.

[0009] Preferably, the leak-proof assembly includes an upper arc plate and a lower arc plate, and the upper arc plate and the lower arc plate are respectively provided with clamping grooves on opposite sides, and the inner walls of the clamping grooves are provided with sealing parts for sealing, and the upper arc plate and the lower arc plate are fixedly connected at opposite ends.

[0010] Preferably, the blocking member includes a blocking block, and an end of the blocking block opposite to the inner wall of the clamping groove is fixedly connected with an adhesive for connecting the blocking block and the clamping groove, and the blocking block is fixed in the clamping groove by the adhesive.

[0011] Preferably, the driving assembly includes a driving member and a guide member. The driving member is arranged at the top of the downstream pipeline, and is used to drive the movement of the upper arc plate; the guide member is arranged at the bottom of the downstream pipeline, and is used to limit the moving direction of the lower arc plate.

[0012] Preferably, the driving member includes a hydraulic device and a mounting seat.

[0013] The driving end of the hydraulic device is fixedly connected to a linkage block, the bottom end of the linkage block is fixedly connected to the outer wall of the upper arc plate, and the input end of the hydraulic device is electrically connected to the output end of the control device; the bottom end of the hydraulic device is fixedly connected to the top end of the mounting seat, and the bottom end of the mounting seat is fixedly connected to the outer wall of the downstream pipeline.

[0014] Preferably, the guide member includes a guide rod, the outer wall of the guide rod is provided with a guide block, a circular through groove is opened on one side of the guide block, the guide rod is connected with the circular through groove through insertion, and the top of the guide block is fixedly connected to the outer wall of the lower arc plate.

[0015] Preferably, the guide member further includes a first fixing plate and a second fixing plate.

[0016] The top of the first fixed plate is fixedly connected to the bottom end of the downstream pipe; the top of the second fixed plate is fixedly connected to the bottom end of the upstream pipe, and the two ends of the guide rod are respectively fixedly connected to the opposite sides of the first fixed plate and the second fixed plate.

[0017] Preferably, a control device and a transmission device are provided inside the control equipment, and a control system is provided inside the control device. The control system includes an input module, a judgment module, a timing module and an output end module. The input module is used to receive the transmission data of the natural gas detector, the judgment module is used to judge whether the data value transmitted by the natural gas detector reaches the set value, the timing module is used to record the time exceeding the set value, and the output end module is used to output a control signal.

[0018] Technical effects and advantages of the present invention:

[0019] The present invention utilizes the design of an electromagnetic control valve, a natural gas detector, a leak-blocking assembly, a drive assembly, and a control device. The natural gas detector is used to monitor the gas at the connection between the downstream and upstream pipelines. When a leak occurs, the control device controls the hydraulic device to push the leak-blocking assembly to block the connecting flange, prevent the leak, and send a signal to the control room. When the downstream and upstream pipelines continue to leak, the control device controls the electromagnetic control valve to close the valve to prevent further leakage of natural gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a three-dimensional structural diagram of the overall safety device provided by the present invention.

[0021] Figure 2 It is a three-dimensional structural diagram of the connection between the upstream pipeline and the downstream pipeline of the present invention.

[0022] Figure 3 It is a three-dimensional structural diagram of the leak-proof component of the present invention.

[0023] Figure 4 This is a three-dimensional structural diagram of the upper arc plate of the present invention.

[0024] Figure 5 This is a three-dimensional structural diagram of the lower arc plate of the present invention.

[0025] Figure 6 Schematic diagram of the control system of the present invention.

[0026] In the figure: 1. Downstream pipeline; 2. Upstream pipeline; 3. Connecting flange; 4. Control equipment; 5. Natural gas detector; 6. Leakage plugging assembly; 601. Upper arc plate; 602. Lower arc plate; 603. Linkage block; 604. Guide block; 7. Driving member; 701. Hydraulic device; 702. Mounting seat; 8. Guide member; 801. Guide rod; 802. First fixed plate; 803. Second fixed plate; 9. Solenoid control valve; 10. Sealing block; 11. Adhesive; 12. Mounting bracket. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] In the first embodiment, the present invention provides Figure 1-6The shown device is an intelligent integrated leak plugging and shut-off natural gas pipeline safety device, which is applied to a downstream pipeline 1 and an upstream pipeline 2. A connecting flange 3 is provided at the opposite end of the downstream pipeline 1 and the upstream pipeline 2, and the connecting flange 3 is used to connect the downstream pipeline 1 and the upstream pipeline 2; an electromagnetic control valve 9 is provided at the end of the upstream pipeline 2 away from the downstream pipeline 1; a natural gas detector 5 is provided on one side of the connecting flange 3; a leak plugging component 6 is provided on the outside of the downstream pipeline 1; a drive component is provided on the outside of the downstream pipeline 1, and the drive component is used to drive the movement of the leak plugging component 6; a control device 4 is provided on one side of the downstream pipeline 1, and the control device 4 is used to control the electromagnetic control valve 9, the natural gas detector 5 and the drive component.

[0029] The upstream pipeline 2 and the opposite end of the electromagnetic control valve 9 are fixedly connected, the input end of the electromagnetic control valve 9 is electrically connected to the output end of the control device 4, and the output end of the natural gas detector 5 is electrically connected to the input end of the control device 4.

[0030] Mounting frames 12 for supporting the downstream pipeline 1 and the upstream pipeline 2 are respectively provided on the outside of the downstream pipeline 1 and the upstream pipeline 2 .

[0031] The control device 4 is internally provided with a control device and a transmission device. The control device is internally provided with a control system. The control system includes an input module, a judgment module, a timing module and an output module. The input module is used to receive the transmission data of the natural gas detector 5, the judgment module is used to judge whether the data value transmitted by the natural gas detector 5 reaches the set value, the timing module is used to record the time exceeding the set value, and the output module is used to output the control signal.

[0032] Specifically, see Figure 1, the connecting flange 3 is welded to the opposite end of the downstream pipeline 1 and the upstream pipeline 2, and the two connecting flanges 3 are fixedly connected by bolts, thereby realizing the through connection of the downstream pipeline 1 and the upstream pipeline 2 for the transportation of natural gas. The electromagnetic control valve 9 is an existing solenoid valve. The two ends of the electromagnetic control valve 9 are respectively welded with connecting flanges 3, which are used to connect with the upstream pipeline 2 and other pipelines. The mounting frame 12 is a U-shaped hoop, which is sleeved on the outer wall of the upstream pipeline 2 and the downstream pipeline 1 to fix the position of the downstream pipeline 1 and the upstream pipeline 2. The control device of the control equipment 4 is a PLC control device, and the transmission device is a control panel connected to the data cable. The input module of the control device is electrically connected to the natural gas detector 5 through wires. The natural gas detector 5 is an existing RBT-6000-ZLG natural gas leak detection alarm, which is used to monitor whether there is a natural gas leak at the connection between the downstream pipeline 1 and the upstream pipeline 2. The natural gas detector 5 will monitor in real time The measured data is transmitted to the control device, and the input module transmits the data to the judgment module. The judgment module compares it with the set threshold. When the value is equal to or greater than the threshold, the judgment module simultaneously sends a signal to the transmission device, the timing device and the output module. The transmission device transmits the leakage information to the control room, and the judgment module sends a signal to the output module. The output module controls the start of the hydraulic device 701, so that the hydraulic device 701 pushes the linkage block 603, and the linkage block 603 drives the movement of the upper arc plate 601 and the lower arc plate 602 to cover the position of the connecting flange 3. After the covering, the natural gas detector 5 can still detect the leak. At this time, the timing time of the timing module exceeds the set threshold, and the timing module sends a signal to the output module. At this time, the output module outputs a signal to the electromagnetic control valve 9 to control the closure of the electromagnetic control valve 9 to prevent the upstream from continuing to transmit natural gas, thereby reducing the workload of the staff in the field for natural gas pipeline leak detection.

[0033] Second embodiment, see Figure 3-Figure 5 This embodiment provides a leak-proof component 6 and a driving component, which are applied to the safety protection device in Example 1. The leak-proof component 6 includes an upper arc plate 601 and a lower arc plate 602. The upper arc plate 601 and the lower arc plate 602 are respectively provided with clamping grooves on the opposite sides. The inner walls of the clamping grooves are provided with sealing members for sealing. The opposite ends of the upper arc plate 601 and the lower arc plate 602 are fixedly connected.

[0034] The blocking member includes a blocking block 10 , which is connected to the inner wall of the clamping groove by adhesive 11 .

[0035] See also Figure 3 The driving assembly includes a driving member 7 and a guide member 8.

[0036] The driving member 7 is arranged at the top of the downstream pipeline 1 and is used to drive the movement of the upper arc plate 601 ; the guiding member 8 is arranged at the bottom of the downstream pipeline 1 and is used to limit the movement direction of the lower arc plate 602 .

[0037] See also Figure 3 The driving member 7 includes a hydraulic device 701 and a mounting base 702. The driving end of the hydraulic device 701 is fixedly connected to the linkage block 603, the bottom end of the linkage block 603 is fixedly connected to the outer wall of the upper arc plate 601, and the input end of the hydraulic device 701 is electrically connected to the output end of the control device 4; the bottom end of the hydraulic device 701 is fixedly connected to the top end of the mounting base 702, and the bottom end of the mounting base 702 is fixedly connected to the outer wall of the downstream pipeline 1.

[0038] See also Figure 3 and Figure 5 The guide member 8 includes a guide rod 801. The outer wall of the lower arc plate 602 is fixedly connected to the guide block 604. A circular through groove is opened on the guide block 604, and the guide rod 801 passes through the circular through groove.

[0039] See also Figure 3 and Figure 5 The guide member 8 also includes a first fixing plate 802 and a second fixing plate 803.

[0040] The top end of the first fixing plate 802 is fixedly connected to the bottom end of the downstream pipe 1;

[0041] The top end of the second fixing plate 803 is fixedly connected to the bottom end of the upstream pipe 2 , and both ends of the guide rod 801 are fixedly connected to the opposite sides of the first fixing plate 802 and the second fixing plate 803 , respectively.

[0042] Specifically, the upper arc plate 601 and the lower arc plate 602 are symmetrically arranged arc plates, and the clamping grooves of the upper arc plate 601 and the lower arc plate 602 are bonded to the blocking block 10 by the adhesive 11. The blocking block 10 blocks the position of the connecting flange 3 by extrusion deformation with the connecting flange 3. The linkage block 603 is welded and fixed to the contact part of the upper arc plate 601. The hydraulic device 701 is an existing hydraulic electric push rod. The hydraulic device 701 is fixed to the mounting seat 702 by bolts. The mounting seat 702 is welded and fixed to the downstream pipeline 1. The output end of the hydraulic device 701 is connected to the linkage block 6 03 bolt fixation, the contact part between the lower arc plate 602 and the guide block 604 is welded and fixed, the size of the circular through groove of the guide block 604 is adapted to the size of the guide rod 801, the contact part between the first fixed plate 802 and the downstream pipe 1 is welded and fixed, the contact part between the second fixed plate 803 and the upstream pipe 2 is welded and fixed, the contact part between the guide rod 801 and the first fixed plate 802 and the second fixed plate 803 is fixed with bolts, and the stroke of the driving end of the hydraulic device 701 can just make the center line position of the upper arc plate 601 and the lower arc plate 602 coincide with the contact position of the two connecting flanges 3.

[0043] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An intelligent leak plugging and shutoff integrated natural gas pipeline safety device, applied to adjacent downstream pipelines (1) and upstream pipelines (2), with connecting flanges (3) provided at opposite ends of the downstream pipeline (1) and the upstream pipeline (2), characterized in that: include: an electromagnetic control valve (9), the electromagnetic control valve (9) being arranged on the upstream pipeline (2); a natural gas detector (5), the natural gas detector (5) being arranged near the connecting flange (3); A leak-blocking assembly (6), the leak-blocking assembly (6) being arranged outside the downstream pipeline (1); A driving assembly, the driving assembly being arranged outside the downstream pipeline (1) and being used to drive the movement of the leak-blocking assembly (6); A control device (4) is used to control an electromagnetic control valve (9), a natural gas detector (5) and a drive assembly.

2. The intelligent leak plugging and shutoff integrated natural gas pipeline safety device according to claim 1 is characterized in that: The upstream pipeline (2) and the electromagnetic control valve (9) are fixedly connected at opposite ends, the input end of the electromagnetic control valve (9) is electrically connected to the output end of the control device (4), and the output end of the natural gas detector (5) is electrically connected to the input end of the control device (4).

3. The intelligent leak plugging and shutoff integrated natural gas pipeline safety device according to claim 1 is characterized in that: Mounting frames (12) for supporting the downstream pipeline (1) and the upstream pipeline (2) are respectively provided on the outside of the downstream pipeline (1) and the upstream pipeline (2).

4. The intelligent leak plugging and shutoff integrated natural gas pipeline safety device according to claim 1 is characterized in that: The leak-blocking assembly (6) comprises an upper arc plate (601) and a lower arc plate (602); the inner walls of the upper arc plate (601) and the lower arc plate (602) are respectively provided with clamping grooves; the inner walls of the clamping grooves are provided with sealing members for sealing; the upper arc plate (601) and the lower arc plate (602) are fixedly connected at opposite ends.

5. The intelligent leak plugging and shutoff integrated natural gas pipeline safety device according to claim 4 is characterized in that: The blocking piece comprises a blocking block (10), and the blocking block (10) is fixed on the inner wall of the clamping groove by means of adhesive (11).

6. The intelligent leak plugging and shutoff integrated natural gas pipeline safety device according to claim 4 is characterized in that: The drive assembly includes: A driving member (7), the driving member (7) being arranged at the top of the downstream pipeline (1), and the driving member (7) being used to drive the movement of the upper arc plate (601); A guide member (8) is provided at the bottom of the downstream pipe (1), and the guide member (8) is used to guide the moving direction of the lower arc plate (602).

7. The intelligent leak plugging and shutoff integrated natural gas pipeline safety device according to claim 6 is characterized in that: The driving member (7) comprises: A hydraulic device (701), wherein a driving end of the hydraulic device (701) is fixedly connected to a linkage block (603), a bottom end of the linkage block (603) is fixedly connected to an outer wall of the upper arc plate (601), and an input end of the hydraulic device (701) is electrically connected to an output end of the control device (4); The mounting seat (702) has a bottom end of the hydraulic device (701) fixedly connected to a top end of the mounting seat (702), and a bottom end of the mounting seat (702) fixedly connected to an outer wall of a downstream pipeline (1).

8. The intelligent leak plugging and shutoff integrated natural gas pipeline safety device according to claim 6 is characterized in that: The guide member (8) comprises: The guide block (604), the top end of the guide block (604) is fixedly connected to the outer wall of the lower arc plate (602), and the guide block (604) is provided with a circular through groove; A guide rod (801) passes through the circular through slot.

9. The intelligent leak plugging and shutoff integrated natural gas pipeline safety device according to claim 8 is characterized in that: The guide member (8) further comprises: a first fixing plate (802), the top end of the first fixing plate (802) being fixedly connected to the bottom end of the downstream pipeline (1); A second fixed plate (803), the top of which is fixedly connected to the bottom of the upstream pipe (2), and the two ends of the guide rod (801) are fixedly connected to the first fixed plate (802) and the second fixed plate (803), respectively.

10. The intelligent leak plugging and shutoff integrated natural gas pipeline safety device according to claim 1 is characterized in that: The control device (4) is internally provided with a control device and a transmission device, and the control device is internally provided with a control system, and the control system comprises an input module, a judgment module, a timing module and an output end module, wherein the input module is used to receive the transmission data of the natural gas detector (5), the judgment module is used to judge whether the data value transmitted by the natural gas detector (5) reaches a set value, the timing module is used to record the time when the set value is exceeded, and the output end module is used to output a control signal.

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