Explosion-proof type natural gas flow meter rapid dismounting and mounting system and rapid dismounting and mounting method

Abstract

The invention relates to the technical field of natural gas flow detection, and discloses an explosion-proof type natural gas flow meter quick disassembly and assembly system and a quick disassembly and assembly method. The quick disassembly and assembly system comprises a flow meter assembly and an anti-explosion assembly. The flow meter assembly comprises a flow meter and two sets of sealing connection structures arranged at the two ends of the flow meter respectively, each sealing connection structure comprises a gasket, a flange body and a hoop, the flange bodies and end flanges of a to-be-measured pipeline are coaxially arranged, the peripheries of the flange bodies and the end flanges are sleeved with the hoops, the hoops are closed to be used for connecting the flange bodies and the end flanges, and the gaskets are arranged on the gaskets. The gasket is clamped between the flange body and the end flange; the explosion-proof assembly comprises an explosion-proof cylinder and a methane sensor, the explosion-proof cylinder comprises two half cylinders, one side edges of the two half cylinders are connected through a hinge, the other side edges of the two half cylinders can be closed through a lock catch structure, and the flowmeter assembly can be located in the explosion-proof cylinder and connected with a pipeline to be detected. The anti-explosion cylinder is closed so that the flowmeter assembly and the methane sensor can be located in the sealed space.

Description

Technical Field

[0001] This invention relates to the field of natural gas flow detection technology, and in particular to a quick disassembly and assembly system and method for an explosion-proof natural gas flow meter. Background Technology

[0002] The replacement of existing flow meters requires complete removal of the flow meter from the pipeline. The flow meter connectors are rigidly connected to the pipeline at both ends, making the disassembly and reassembly process complex and inconvenient. Furthermore, after installation, natural gas flow meters are prone to explosion at the installation location when the gas pressure in the pipeline is unstable, posing a threat to personal safety.

[0003] Therefore, there is an urgent need for a quick disassembly and assembly system and method for explosion-proof natural gas flow meters to solve the above problems. Summary of the Invention

[0004] One objective of this invention is to provide a quick disassembly and assembly system for an explosion-proof natural gas flow meter, so as to achieve quick disassembly and assembly of the natural gas flow meter while ensuring its safe use.

[0005] Based on the above concept, the technical solution adopted by this invention is as follows:

[0006] A quick-installation and disassembly system for an explosion-proof natural gas flow meter is provided, comprising:

[0007] A flow meter assembly includes a flow meter and two sets of sealing connection structures respectively disposed at both ends of the flow meter. The sealing connection structure includes a clamp flange and a gasket. The clamp flange includes a flange body and a clamp. The flange body is coaxially disposed with the end flange of the pipeline to be tested. The clamp is sleeved on the outer periphery of the flange body and the end flange. The clamp can be closed to connect the flange body and the end flange. The gasket is sandwiched between the flange body and the end flange.

[0008] An explosion-proof assembly includes an explosion-proof cylinder and a methane sensor disposed within the explosion-proof cylinder. The explosion-proof cylinder includes two semi-cylinders, one side of which is connected by a hinge, and the other side of which can be closed by a locking structure. The flow meter assembly can be located inside the explosion-proof cylinder and connected to the pipeline to be tested. The explosion-proof cylinder is closed so that both the flow meter assembly and the methane sensor are located in a sealed space.

[0009] Optionally, the outer periphery of the flange body is provided with external teeth, and the inner ring of the clamp is provided with internal teeth. When the clamp is closed, the external teeth and the internal teeth mesh.

[0010] Optionally, a sealing ring groove is provided on the flange body, the inner wall of the sealing ring groove forms a first angle α with the axial direction of the flange body, 2°≤a≤5°, and the gasket is located in the sealing ring groove and abuts against the inner wall of the sealing ring groove.

[0011] Optionally, one of the inner wall of the sealing ring groove and the gasket is provided with a positioning protrusion, and the other is provided with a positioning groove, with the positioning protrusion inserted into the positioning groove.

[0012] Optionally, the explosion-proof assembly further includes a displacement sensor disposed on the explosion-proof cylinder, the displacement sensor being used to detect the distance between the two half-cylinders on the other side where the locking structure is disposed.

[0013] Optionally, the explosion-proof natural gas flow meter quick disassembly and assembly system further includes a positioning component, which is located between two pipelines to be tested. The positioning component is used to support the explosion-proof cylinder and drive the explosion-proof cylinder to a preset installation position, and the flow meter assembly is located inside the explosion-proof cylinder.

[0014] Optionally, the explosion-proof natural gas flow meter quick disassembly and assembly system further includes a conveying assembly, which includes a drive trolley and a lifting platform. The lifting platform is mounted on the drive trolley and is used to place the explosion-proof cylinder. The drive trolley is used to drive the lifting platform to move horizontally, and the lifting platform is used to drive the explosion-proof cylinder to move vertically.

[0015] Optionally, the explosion-proof natural gas flow meter quick disassembly and assembly system further includes a drive assembly, which includes an electric telescopic device for pushing at least one end of the test pipeline to move so that the two ends of the test pipeline respectively abut against the two ends of the flow meter assembly.

[0016] Optionally, the explosion-proof natural gas flow meter quick disassembly and assembly system further includes a drive assembly, which includes a push rod and an electromagnetic latch. The push rod is used to push the upper half-cylinder to rotate so that the two half-cylinders are closed by the electromagnetic latch.

[0017] Another objective of this invention is to provide a quick disassembly and assembly method to enable the rapid disassembly and assembly of a natural gas flow meter while ensuring its safe use.

[0018] Based on the above concept, the technical solution adopted by this invention is as follows:

[0019] A quick assembly / disassembly method is provided, including the following steps:

[0020] The flow meter assembly is placed inside the explosion-proof cylinder, and then the explosion-proof cylinder is placed on the lifting platform. The trolley is driven to move the lifting platform horizontally to the predetermined position, and then the lifting platform is moved up to the transport position.

[0021] The explosion-proof cylinder is moved from the lifting platform to the positioning component, and the positioning component rises to the corresponding preset installation position according to the selected explosion-proof cylinder and flow meter component;

[0022] Use an electric expansion joint to push the pipeline under test until both ends of the pipeline under test are in contact with the flow meter assembly;

[0023] The two clamps are respectively put on the end flanges and flange bodies at both ends and closed to make the flow meter assembly and the pipelines to be measured at both ends sealed.

[0024] The upper half-cylinder is rotated, causing the two half-cylinders to close through the locking structure to achieve an explosion-proof seal. The flow meter assembly and the connection between the flow meter assembly and the pipeline under test are all located inside the sealed explosion-proof cylinder.

[0025] When the displacement sensor detects that the explosion-proof cylinder is closed, the flow meter assembly starts its detection operation, and at the same time, the methane sensor operates to detect in real time whether there is a natural gas leak inside the explosion-proof cylinder.

[0026] The beneficial effects of this invention are as follows:

[0027] This invention proposes a rapid disassembly and assembly system for an explosion-proof natural gas flow meter, comprising a flow meter assembly and an explosion-proof assembly. The flow meter assembly includes a flow meter and two sets of sealing connection structures respectively disposed at both ends of the flow meter. Each sealing connection structure includes a clamp flange and a gasket. The clamp flange includes a flange body and a clamp. The flange body is coaxially arranged with the end flange of the pipeline to be tested. The clamp is fitted around the outer periphery of the flange body and the end flange. When closed, the clamp connects the flange body and the end flange. The gasket is sandwiched between the flange body and the end flange. Because the clamp has an opening, it can be opened and fitted onto the abutting end flange and flange body, and then closed to fix the end flange and flange body together. Through the above operations, it can be connected to the pipelines to be tested at both ends, thus enabling the flow of natural gas and facilitating rapid disassembly and assembly of the natural gas flow meter. The explosion-proof assembly includes an explosion-proof cylinder and a methane sensor disposed within the explosion-proof cylinder. The explosion-proof cylinder includes two half-cylinders, one side of which is connected by a hinge, and the other side of which can be closed by a locking structure. The flow meter assembly is placed inside the explosion-proof cylinder. Once the flow meter assembly and the explosion-proof cylinder are in the preset positions, the pipeline to be tested can be fixed to the flow meter assembly through a sealed connection structure. Then, the two half-cylinders are closed using a locking structure, ensuring that the flow meter assembly and its connection to the pipeline to be tested are both located inside the explosion-proof cylinder. The closure of the explosion-proof cylinder creates a sealed space inside, within which the methane sensor is also located. The methane sensor detects the methane content within the explosion-proof cylinder to detect any natural gas leaks at the location where the flow meter assembly is installed. It can also issue an early warning when the methane content exceeds a warning threshold, ensuring the safe use of the natural gas flow meter.

[0028] The rapid assembly and disassembly method proposed in this invention includes the following steps: placing the flow meter assembly inside the explosion-proof cylinder, then placing the explosion-proof cylinder on a lifting platform, driving the trolley to move the lifting platform horizontally to a predetermined position, and then moving the lifting platform to a transport position; transporting the explosion-proof cylinder from the lifting platform to the positioning component, the positioning component rising to the corresponding preset installation position according to the selected explosion-proof cylinder and flow meter assembly; using an electric telescopic device to push the test pipeline until both ends of the test pipeline abut against the flow meter assembly; fitting two clamps onto the end flanges and flange bodies at both ends respectively and closing them, thereby sealing the flow meter assembly and the test pipelines at both ends; pushing the upper half-cylinder to rotate, so that the two half-cylinders close through the locking structure to achieve a seal of the explosion-proof cylinder, with the flow meter assembly and the connection between the flow meter assembly and the test pipeline all located inside the sealed explosion-proof cylinder; the displacement sensor detects that the explosion-proof cylinder is closed, the flow meter assembly starts detection, and at the same time the methane sensor works to detect whether there is natural gas leakage inside the explosion-proof cylinder in real time. This quick disassembly and assembly method enables the rapid disassembly and assembly of natural gas flow meters while ensuring their safe use. Attached Figure Description

[0029] Figure 1 This is a partial structural schematic diagram of the explosion-proof natural gas flow meter quick disassembly and assembly system provided in an embodiment of the present invention;

[0030] Figure 2 This is a cross-sectional view of the sealing connection structure provided in an embodiment of the present invention;

[0031] Figure 3 This is a structural schematic diagram of the explosion-proof component provided in an embodiment of the present invention.

[0032] In the picture:

[0033] 1. Flowmeter assembly; 11. Flowmeter; 12. Sealing connection structure; 121. Clamp; 122. Flange body; 123. Gasket;

[0034] 2. Explosion-proof components; 21. Explosion-proof cylinder; 211. Half cylinder; 212. Through hole; 213. Locking structure; 22. Methane sensor;

[0035] 100. Pipeline to be tested; 1001. End flange. Detailed Implementation

[0036] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. Furthermore, it should be noted that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings, not all of them.

[0037] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0040] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0041] like Figures 1 to 3 As shown, this embodiment provides a quick disassembly and assembly system for an explosion-proof natural gas flow meter, including a flow meter assembly 1 and an explosion-proof assembly 2. The flow meter assembly 1 includes a flow meter 11 and two sets of sealing connection structures 12 respectively disposed at both ends of the flow meter 11. When the flow meter assembly 1 is placed between two sections of pipeline 100 to be tested, the flow meter assembly 1 can be sealed and connected to the pipeline 100 to be tested at both ends through the sealing connection structures 12 at both ends, thereby allowing the natural gas in the pipeline 100 to be tested to be detected by the flow meter 11.

[0042] Specifically, refer to Figure 2The sealing connection structure 12 includes a clamp flange and a gasket 123. The clamp flange includes a flange body 122 and a clamp 121. The flange body 122 abuts against the end flange 1001 of the pipeline to be tested 100. The gasket 123 is sandwiched between the flange body 122 and the end flange 1001. The clamp 121 is fitted around the outer periphery of the flange body 122 and the end flange 1001. The clamp 121 closes to seal the flange body 122 and the end flange 1001. In specific implementation, since the flow meter 11 is connected to the pipeline to be tested 100, the flow meter 11 needs to have a cylinder with the same diameter as the pipeline to be tested 100 so that the flange body 122 and the end flange 1001 are coaxial when connected. This flow meter 11 is an existing product and will not be described in detail here. The clamp 121, having an opening, can be opened and fitted onto the abutting end flange 1001 and flange body 122, and then closed to securely connect the end flange 1001 and flange body 122. Both ends of the flowmeter assembly 1 are connected to the measured pipelines 100 at both ends through the above operation, thus enabling the natural gas flow loop to be open. This explosion-proof natural gas flowmeter quick-disassembly and assembly system achieves quick disassembly and assembly of the natural gas flowmeter 11 by using clamp flanges.

[0043] Specifically, refer to Figure 3 The explosion-proof component 2 includes an explosion-proof cylinder 21 and a methane sensor 22 disposed within the explosion-proof cylinder 21. The explosion-proof cylinder 21 includes two semi-cylinders 211, one side of which is connected by a hinge, and the other side of which can be closed by a locking structure 213. In specific implementation, the flow meter component 1 can be placed inside the explosion-proof cylinder 21 first. After the flow meter component 1 and the explosion-proof cylinder 21 are in the preset position, the pipeline to be tested 100 and the flow meter 11 can be fixed by the sealing connection structure 12. Then, the two semi-cylinders 211 are closed by the locking structure 213 so that the flow meter component 1 and the connection between the flow meter component 1 and the pipeline to be tested 100 are both located inside the explosion-proof cylinder 21. The closure of the explosion-proof cylinder 21 creates a sealed space inside, within which the methane sensor 22 is also located. The methane sensor 22 detects the methane content within the explosion-proof cylinder 21 to detect any natural gas leak at the flow meter assembly 1, and can issue an early warning when the methane content exceeds a warning threshold. This explosion-proof natural gas flow meter quick-disassembly system ensures the safe use of the natural gas flow meter 11 by incorporating the explosion-proof cylinder 21 and the methane sensor 22.

[0044] In this embodiment, the explosion-proof cylinder 21 is made of carbon steel with a wall thickness of 6mm, and a PTFE (polytetrafluoroethylene) coating is provided on the surface to increase corrosion resistance.

[0045] In this embodiment, to facilitate the closure of the explosion-proof cylinder 21, the explosion-proof natural gas flow meter quick disassembly and assembly system also includes a drive assembly. The drive assembly includes a push rod, and the locking structure 213 is an electromagnetic lock. By extending and retracting the push rod, the upper half-cylinder 211 can rotate toward the lower half-cylinder 211 when pushed. The push rod gives the upper half-cylinder 211 the tendency to rotate, and the upper half-cylinder 211 falls down under the action of gravity. After the two come into contact, the explosion-proof cylinder 21 is closed under the action of the electromagnetic lock, which can realize the automatic closure of the explosion-proof cylinder 21 without the need for manual closure.

[0046] In this embodiment, to facilitate the connection between the flow meter assembly 1 and the test pipeline 100, the explosion-proof natural gas flow meter quick-disassembly and assembly system also includes a drive assembly. The drive assembly includes an electric expansion joint, which is used to move at least one end of the test pipeline 100 so that the two ends of the test pipeline 100 respectively abut against the two ends of the flow meter assembly 1. The electric expansion joint is used to move the test pipeline 100 until one end of the test pipeline 100, the flow meter assembly 1, and the other end of the test pipeline 100 are coaxially abutted, preparing for the subsequent fitting of the clamps 121 onto the flange bodies 122 and end flanges 1001 at both ends. The electric expansion joint is prior art and will not be described in detail here.

[0047] Optionally, the outer periphery of the flange body 122 is provided with external teeth, and the inner ring of the clamp 121 is provided with internal teeth. The size of the clamp 121 is adapted to the size of the flange body 122 and the end flange 1001. In the open state, the clamp 121 can be fitted onto the outer periphery of the flange body 122 and the end flange 1001. When the clamp 121 is closed, it locks the flange body 122 and the end flange 1001. When the clamp 121 is closed, the external teeth on the flange body 122 and the internal teeth on the clamp 121 engage, preventing the clamp 121 from detaching from or moving from the flange body 122, thus ensuring the stability of the connection between the flowmeter assembly 1 and the pipeline 100 to be measured. In this embodiment, the clamp 121 consists of two semi-ring structures. One end of the semi-ring structure is rotatably connected, and the other end is connected by a snap fastener, so that the clamp 121 can be fitted onto the outer periphery of the flange body 122 in the open state.

[0048] Optionally, a sealing ring groove is provided on the flange body 122, and the gasket 123 is located within the sealing ring groove. The sealing ring groove is used to limit the installation position of the gasket 123, ensuring that the gasket 123 does not shift during assembly. Furthermore, the inner wall of the sealing ring groove forms a first angle α with the axial direction of the flange body 122, where 2° ≤ α ≤ 5°. The gasket 123 is located within the sealing ring groove and abuts against the inner wall of the sealing ring groove. In this embodiment, α = 3°. The outer circumferential surface of the gasket 123 and the inner wall surface of the sealing ring groove are both machined into inclined surfaces that are not parallel to the axial direction of the flange body 122. This allows the gasket 123 to interfere with the two 3° inclined surfaces when compressed, thereby forming a line contact sealing surface, which can increase the sealing pressure by approximately 30% compared to a traditional O-ring. In this embodiment, the gasket 123 is a metal octagonal gasket, and the structure of the sealing ring groove is adapted to the shape of the gasket 123.

[0049] Optionally, one of the inner wall of the sealing ring groove and the gasket 123 may be provided with a positioning protrusion, and the other with a positioning groove, with the positioning protrusion inserted into the positioning groove. The cooperation between the positioning protrusion and the positioning groove allows the gasket 123 to be accurately installed in the preset position within the sealing ring groove, ensuring the coaxiality of the gasket 123 and the flange body 122, so that the force on the gasket 123 is evenly distributed, ensuring a sealing effect.

[0050] Furthermore, in this embodiment, the flow meter assembly 1 is disposed inside the explosion-proof cylinder 21, and the test pipeline 100 connecting the flow meter assembly 1 passes through the explosion-proof cylinder 21. Both ends of the two semi-cylinders 211 are provided with through holes 212, each through hole 212 being composed of two semicircles. The through holes 212 are used to pass through the test pipeline 100. When the two semi-cylinders 211 are closed, the inner wall of the through hole 212 seals against the outer wall of the test pipeline 100 to ensure the sealing performance of the explosion-proof cylinder 21. In specific implementation, a sealing gasket can be provided on the inner wall of the through hole 212 and / or the outer wall of the test pipeline 100. By squeezing the sealing gasket, the gap between the inner wall of the through hole 212 and the outer wall of the test pipeline 100 is filled, ensuring that the flow meter assembly 1 can be in a sealed environment. Alternatively, a sealing strip can be provided on the side where the two semi-cylinders 211 abut, to ensure the sealing effect at the connection of the two semi-cylinders 211.

[0051] In this embodiment, the explosion-proof component 2 also includes an explosion-proof junction box. The methane sensor 22 is connected to the controller signal of the explosion-proof natural gas flow meter quick-release system through the explosion-proof junction box. The explosion-proof junction box is disposed inside the explosion-proof cylinder 21. The explosion-proof junction box, through its flameproof housing, confines any potential sparks or high temperatures within the box, ensuring safe and reliable power and signal transmission in flammable and explosive environments, while preventing explosions caused by electrical sparks or high temperatures.

[0052] In this embodiment, the explosion-proof component 2 also includes a displacement sensor, which is disposed on the explosion-proof cylinder 21. The displacement sensor is used to detect the distance between the two semi-cylinders 211 on the other side where the locking structure 213 is located. By using the displacement sensor to detect the distance between the two semi-cylinders 211, it is determined whether the two semi-cylinders 211 have been closed by the locking structure 213. Subsequent testing can only be carried out after the explosion-proof cylinder 21 has been closed.

[0053] Furthermore, the explosion-proof natural gas flow meter rapid disassembly and assembly system also includes a conveying assembly, which comprises a drive trolley and a lifting platform. The lifting platform is mounted on the drive trolley and is used to place the explosion-proof cylinder 21. The flow meter assembly 1 is located inside the explosion-proof cylinder 21. The drive trolley is used to move the lifting platform horizontally, while the lifting platform is used to support the explosion-proof cylinder 21 in vertical movement. The drive trolley can be equipped with a laser navigation module to ensure the accuracy of its movement, enabling it to move accurately to the predetermined position. The lifting platform then moves vertically to raise the explosion-proof cylinder 21 and flow meter assembly 1, preparing for subsequent connection of the flow meter assembly 1 to the pipeline 100 to be tested. The lifting platform can be moved vertically using a structure commonly used in existing technologies, such as a screw and nut structure. The motor is connected to the screw and nut structure, and the motor drives the screw to rotate, so that the nut can move along the axial direction of the screw. Here, the nut can serve as the platform structure for placing the explosion-proof component 2 on the lifting platform, and the platform structure can move vertically.

[0054] Optionally, the explosion-proof natural gas flow meter quick-installation and disassembly system also includes a positioning component. Located between the two sections of the pipeline 100 to be tested, the positioning component allows the explosion-proof cylinder 21 and flow meter assembly 1 on the lifting platform to be transferred to the positioning component first. Then, the positioning component precisely places the explosion-proof cylinder 21 into a preset installation position between the two sections of the pipeline 100 to be tested. The positioning component can be hydraulically driven to ensure the accuracy of the vertical movement of the explosion-proof cylinder 21 and the flow meter assembly 1, ensuring the coaxiality of the cylinder of the flow meter assembly 1 and the pipeline 100 to be tested.

[0055] This embodiment also provides a quick disassembly and assembly method, including the following steps:

[0056] Place the flow meter assembly 1 inside the explosion-proof cylinder 21, then place the explosion-proof cylinder 21 on the lifting platform, drive the trolley to move the lifting platform horizontally to the predetermined position, and then move the lifting platform to the transport position.

[0057] The explosion-proof cylinder 21 is moved from the lifting platform to the positioning component, and the positioning component rises to the corresponding preset installation position according to the selected explosion-proof cylinder 21 and flow meter component 1.

[0058] Use an electric expansion joint to push the test pipe 100 until both ends of the test pipe 100 abut against the flow meter assembly 1;

[0059] Two clamps 121 are respectively fitted onto the end flanges 1001 and flange bodies 122 at both ends and closed, thereby sealing the flow meter assembly 1 and the pipelines 100 to be measured at both ends.

[0060] Push the upper half-cylinder 211 to rotate, so that the two half-cylinders 211 are closed by the locking structure 213 to seal the explosion-proof cylinder 21. The flow meter assembly 1 and the connection between the flow meter assembly 1 and the pipeline 100 to be tested are all located inside the sealed explosion-proof cylinder 21.

[0061] When the displacement sensor detects that the explosion-proof cylinder 21 is closed, the flow meter assembly 1 starts detection, and at the same time the methane sensor 22 works to detect in real time whether there is a natural gas leak inside the explosion-proof cylinder 21.

[0062] The above embodiments merely illustrate the basic principles and characteristics of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A quick-assembly and disassembly system for explosion-proof natural gas flow meters, characterized in that: include: A flow meter assembly (1) includes a flow meter (11) and two sets of sealing connection structures (12) respectively disposed at both ends of the flow meter (11). The sealing connection structure (12) includes a clamp flange and a gasket (123). The clamp flange includes a flange body (122) and a clamp (121). The flange body (122) is coaxially disposed with the end flange (1001) of the pipeline to be tested (100). The clamp (121) is sleeved on the outer periphery of the flange body (122) and the end flange (1001). The clamp (121) can be closed to connect the flange body (122) and the end flange (1001). The gasket (123) is sandwiched between the flange body (122) and the end flange (1001). The explosion-proof assembly (2) includes an explosion-proof cylinder (21) and a methane sensor (22) disposed within the explosion-proof cylinder (21). The explosion-proof cylinder (21) includes two half-cylinders (211). One side of the two half-cylinders (211) is connected by a hinge, and the other side of the two half-cylinders (211) can be closed by a locking structure (213). The flow meter assembly (1) can be located inside the explosion-proof cylinder (21) and connected to the pipeline to be tested (100). The explosion-proof cylinder (21) is closed so that both the flow meter assembly (1) and the methane sensor (22) are located in a sealed space.

2. The explosion-proof natural gas flow meter quick disassembly and assembly system according to claim 1, characterized in that, The outer periphery of the flange body (122) is provided with external teeth, and the inner ring of the clamp (121) is provided with internal teeth. When the clamp (121) is closed, the external teeth and the internal teeth mesh.

3. The explosion-proof natural gas flow meter quick disassembly and assembly system according to claim 1, characterized in that, A sealing ring groove is provided on the flange body (122). The inner wall of the sealing ring groove forms a first angle α with the axial direction of the flange body (122), where 2°≤a≤5°. The gasket (123) is located in the sealing ring groove and abuts against the inner wall of the sealing ring groove.

4. The explosion-proof natural gas flow meter quick disassembly and assembly system according to claim 3, characterized in that, One of the inner wall of the sealing ring groove and the gasket (123) is provided with a positioning protrusion, and the other is provided with a positioning groove. The positioning protrusion is inserted into the positioning groove.

5. The explosion-proof natural gas flow meter quick disassembly and assembly system according to claim 1, characterized in that, The explosion-proof component (2) also includes a displacement sensor, which is disposed on the explosion-proof cylinder (21) and is used to detect the distance between the two half-cylinders (211) on the other side of the locking structure (213).

6. The explosion-proof natural gas flow meter quick disassembly and assembly system according to claim 1, characterized in that, The explosion-proof natural gas flow meter quick disassembly and assembly system also includes a positioning component, which is located between two pipelines (100) to be tested. The positioning component is used to support the explosion-proof cylinder (21) and drive the explosion-proof cylinder (21) to be located in a preset installation position. The flow meter assembly (1) is located inside the explosion-proof cylinder (21).

7. The explosion-proof natural gas flow meter quick disassembly and assembly system according to claim 1, characterized in that, The explosion-proof natural gas flow meter quick disassembly and assembly system also includes a conveying component, which includes a drive trolley and a lifting platform. The lifting platform is mounted on the drive trolley and is used to place the explosion-proof cylinder (21). The drive trolley is used to drive the lifting platform to move horizontally, and the lifting platform is used to drive the explosion-proof cylinder (21) to move vertically.

8. The explosion-proof natural gas flow meter quick disassembly and assembly system according to claim 1, characterized in that, The explosion-proof natural gas flow meter quick disassembly and assembly system also includes a drive assembly, which includes an electric telescoping device. The electric telescoping device is used to push at least one end of the test pipeline (100) to move so that the two ends of the test pipeline (100) respectively abut against the two ends of the flow meter assembly (1).

9. The explosion-proof natural gas flow meter quick disassembly and assembly system according to claim 1, characterized in that, The explosion-proof natural gas flow meter quick disassembly and assembly system also includes a drive assembly, which includes a push rod. The locking structure (213) is an electromagnetic lock. The push rod is used to push the upper half-cylinder (211) to rotate so that the two half-cylinders (211) are closed by the electromagnetic lock.

10. A quick disassembly and assembly method, characterized in that, Includes the following steps: The flow meter assembly (1) is placed inside the explosion-proof cylinder (21), and then the explosion-proof cylinder (21) is placed on the lifting platform. The trolley is driven to move the lifting platform horizontally to the predetermined position, and then the lifting platform is moved up to the transport position. The explosion-proof cylinder (21) is moved from the lifting platform to the positioning assembly, and the positioning assembly is raised to the corresponding preset installation position according to the selected explosion-proof cylinder (21) and flow meter assembly (1); The test pipe (100) is pushed using an electric expansion joint until both ends of the test pipe (100) are in contact with the flow meter assembly (1); Two clamps (121) are respectively fitted onto the end flanges (1001) and flange bodies (122) at both ends and closed, so as to seal the connection between the flow meter assembly (1) and the pipelines (100) to be measured at both ends. The upper half-cylinder (211) is pushed to rotate, so that the two half-cylinders (211) are closed by the locking structure (213) to seal the explosion-proof cylinder (21). The flow meter assembly (1) and the connection between the flow meter assembly (1) and the pipeline to be tested (100) are all located inside the sealed explosion-proof cylinder (21). When the displacement sensor detects that the explosion-proof cylinder (21) is closed, the flow meter assembly (1) starts detection, and at the same time the methane sensor (22) works to detect in real time whether there is a natural gas leak inside the explosion-proof cylinder (21).

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