Modular explosion-proof liquefied petroleum gas sampling device

Abstract

This invention relates to the field of liquefied petroleum gas (LPG) sampling technology, specifically disclosing a modular explosion-proof LPG sampling device. The device includes a sampling bottle with valves at both its upper and lower ends, each connected to a quick-connect fitting. A detection mechanism includes a sleeve fitted over the outside of the sampling bottle, and upper and lower end caps respectively positioned at the upper and lower ends of the sleeve. The sleeve, upper and lower end caps, and the outer wall of the sampling bottle form a sealed cavity filled with liquid. A through-hole is provided on the lower end cap, and a sliding rod is slidably mounted vertically within the through-hole. One end of the sliding rod is located inside the cavity, and the other end is located outside the cavity. A push rod is located at the outer end of the sliding rod, used to push the quick-connect fitting away from the valve. The beneficial effects of this invention are: real-time detection of sampling bottle leaks and timely interruption of the sampling path.

Description

Technical Field

[0001] This invention relates to the field of liquefied petroleum gas sampling technology, specifically to a modular explosion-proof liquefied petroleum gas sampling device. Background Technology

[0002] Liquefied petroleum gas (LPG) is widely used in fuel supply, petrochemical production, and product quality testing. During LPG quality testing, sampling devices are needed to collect samples for subsequent component analysis and performance testing. Due to the flammability, explosiveness, and volatility of LPG, leaks in the sampling bottle or connecting parts during sampling can not only result in sample loss but also potentially cause safety accidents. Existing equipment typically closes the valve between the sampler and the main pipeline after the system pressure stabilizes. The pressure sensor within the sampler system reads the pressure at this point, delays for 10 seconds, and then reads the pressure again for comparison. No pressure drop indicates no leakage, thus achieving leak detection. Therefore, appropriate technical means are needed to monitor and protect against leaks during the sampling process.

[0003] Chinese patent document CN221883215U discloses a closed sampling device for liquefied petroleum gas, including a sampling cylinder, a sampling tube fixed and connected to the lower side of the sampling cylinder, a first valve installed on the sampling tube, a circulation pipe fixed and connected to the upper side of the sampling tube, a second valve installed on the circulation pipe, a sampling tube fixed and connected to one side of the sampling cylinder, a third valve installed on the sampling tube, a connector fixed and connected to one side of the sampling tube, a sampling airbag provided on one side of the connector, an exhaust valve provided at the tail end of the sampling airbag, and a one-way valve provided at the connection between the exhaust valve and the sampling airbag. In the prior art, the sealing performance of the sampling bottle is usually tested by water bath method, soap water detection method, or pressure holding detection method, which can detect some leakage problems before or after sampling. However, most of the above solutions need to be tested separately after sampling, and cannot monitor the leakage of the sampling bottle and connection parts in real time during the sampling process.

[0004] However, existing solutions still have the following shortcomings: First, most existing leak detection methods need to be performed before or after sampling, making it impossible to detect leaks in real time during the sampling process. When a leak occurs in the sampling bottle, it is difficult to take timely measures, posing a safety hazard. Second, when a leak occurs in the sampling bottle, existing devices usually cannot automatically cut off the sampling path, and liquefied petroleum gas will continue to leak, not only wasting samples but also potentially affecting the accuracy of the sampling results. Third, existing detection methods can usually only determine that there is a leak in the sampling device, making it difficult to quickly distinguish whether the leak is located in the sampling bottle body or at the connection between the valve and the sampling bottle, thus increasing the workload of subsequent maintenance and troubleshooting. Fourth, sampling bottles are easily subjected to external impacts during handling and use, and existing sampling devices have limited protection capabilities for the sampling bottle and connection parts, which can easily affect the safety and stability of the device. Summary of the Invention

[0005] This invention provides a modular explosion-proof liquefied petroleum gas sampling device, which aims to solve the problem in related technologies that cannot detect sampling bottle leaks in real time and cut off the sampling path in a timely manner.

[0006] A modular explosion-proof liquefied petroleum gas sampling device includes a sampling bottle with valves at both ends, each valve connected to a quick connector, and further includes: The first testing mechanism includes a sleeve fitted on the outside of the sampling bottle, an upper end cap and a lower end cap respectively set at the upper and lower ends of the sleeve. The sleeve, the upper end cap, the lower end cap and the outer wall of the sampling bottle form a sealed cavity. The cavity is filled with liquid. The lower end cover has a through hole that runs vertically through it. A sliding rod is slidably installed in the through hole along the vertical direction. One end of the sliding rod is located inside the cavity, and the other end is located outside the cavity. A push rod is provided at the end of the sliding rod located outside the cavity. The push rod is used to push the quick connector on the lower side to separate from the valve. The testing facility is also equipped with a positioning and locking assembly for positioning and locking the sliding rod. When the sampling bottle leaks, the leaking liquefied petroleum gas enters the cavity and pushes the sliding rod to move, which in turn causes the push rod to push the quick connector to separate from the valve.

[0007] This allows for real-time monitoring of leaks in the sampling bottle during the sampling process, and automatically cuts off the sampling path when a leak occurs, reducing the safety risks caused by continuous liquefied petroleum gas leaks.

[0008] Preferably, the sampling bottle is provided with a second detection mechanism, which includes two sleeves respectively located on the upper side of the upper end cap and the lower side of the lower end cap. The two sleeves are respectively fitted onto the outside of the connection between the corresponding valve and the sampling bottle, thereby enabling independent monitoring of the connection area between the valve and the sampling bottle and expanding the leakage detection range.

[0009] Preferably, the two sleeves 2 form a sealed cavity 2 with the corresponding valve and sampling bottle, and the two sleeves 2 are connected by a connecting pipe. The cavity 2 is filled with liquid, so that when a leak occurs at any valve connection position, the leakage pressure can be transmitted to the entire detection mechanism 2, thereby improving the reliability of detection.

[0010] Preferably, both sleeves are provided with through holes, and a sliding rod is slidably installed in the through holes along the axis of the sleeve. One end of the sliding rod is located inside the cavity, and the other end is located outside the cavity. A push rod is provided at the end of the sliding rod located outside the cavity. The push rod is used to push the corresponding quick connector to separate from the valve, so as to automatically disconnect the connection when leakage occurs at the connection between the valve and the sampling bottle, thereby reducing the leakage of the medium.

[0011] Preferably, the sleeve two is provided with a positioning and locking component two for positioning and locking the sliding rod two, thereby ensuring the stability of the sliding rod two after its movement and preventing the sliding rod two from resetting itself.

[0012] Preferably, the positioning and locking assembly includes two grooves formed on the inner wall of the sleeve and an elastic telescopic block disposed on the sliding rod. The two grooves are spaced apart along the moving direction of the sliding rod, and the elastic telescopic block can selectively engage with either of the two grooves, thereby realizing the positioning and locking of the sliding rod in the initial state and the triggered state.

[0013] Preferably, the positioning and locking assembly two includes two grooves two formed on the inner wall of the sleeve two and an elastic telescopic block two disposed on the sliding rod two. The two grooves two are spaced apart along the moving direction of the sliding rod two, and the elastic telescopic block two can selectively engage with either of the two grooves two, thereby improving the holding ability of the sliding rod two after movement.

[0014] Preferably, the quick connector is a bidirectional self-sealing quick connector, which automatically seals the flow channels on both sides after the quick connector is separated from the valve, thereby reducing liquefied petroleum gas leakage.

[0015] Preferably, a sealing element is provided between the sliding rod and the through hole to improve the sealing performance of the cavity, prevent liquid leakage in the cavity, and ensure pressure transmission effect.

[0016] Preferably, the sampling bottle is equipped with a handle, which facilitates the handling and transfer of the sampling bottle by staff and improves the ease of use of the device.

[0017] By adopting the above technical solution, the beneficial effects of the present invention are as follows: 1. By forming a sealed detection space outside the sampling bottle through the detection agency, real-time leakage monitoring of the sampling bottle body can be carried out during the sampling process, without the need for separate testing after the sampling is completed, thus improving the timeliness of leakage detection.

[0018] 2. The leaking liquefied petroleum gas pushes the sliding rod to move, and the push rod drives the quick connector to separate from the valve. This can automatically cut off the sampling path when a leak occurs, reducing the safety hazards and sample loss caused by continuous liquefied petroleum gas leakage.

[0019] 3. By monitoring the connection area between the valve and the sampling bottle through the second detection agency, the leakage detection range can be further expanded, and the overall safety of the device can be improved.

[0020] 4. The two cavities are connected by a connecting pipe, so that the detection mechanism can be triggered when a leak occurs at either connection point, thus improving detection sensitivity and reliability.

[0021] 5. Positioning and locking the sliding rod by positioning and locking component one and positioning and locking component two can not only ensure the stability of the device during transportation and use, but also ensure the effect of maintaining the state after triggering.

[0022] 6. By adopting a bidirectional self-sealing quick connector, the flow channel is automatically sealed after the connector is disconnected, further reducing the risk of leakage.

[0023] 7. Sleeves one and two cover the outside of the sampling bottle and the connection part. While realizing the leakage detection function, they can also play a certain role in protecting the sampling bottle and the connection area, improving the safety and stability of the device. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 This is a schematic diagram of the overall structure of the detection mechanism of the present invention.

[0026] Figure 3 This is a cross-sectional view of the second detection mechanism of the present invention.

[0027] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0028] Figure 5 This is a cross-sectional view of the first detection mechanism of the present invention.

[0029] Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0030] Figure 7 This is a schematic diagram of the structure of the sliding rod of the present invention.

[0031] Figure 8 This is a schematic diagram of the structure of the sliding rod II of the present invention.

[0032] Figure label: 1. Sampling bottle; 2. Valve; 3. Quick connector; 4. Detection mechanism one; 41. Sleeve one; 42. Upper end cap; 43. Lower end cap; 44. Cavity one; 45. Sliding rod one; 46. Push rod one; 47. Groove one; 48. Elastic telescopic block one; 5. Detection mechanism two; 51. Sleeve two; 52. Cavity two; 53. Sliding rod two; 54. Push rod two; 55. Groove two; 56. Elastic telescopic block two; 57. Connecting tube; 6. Handle. Detailed Implementation

[0033] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0034] like Figures 1-8 As shown in the figure, a modular explosion-proof liquefied petroleum gas (LPG) sampling device according to an embodiment of the present invention comprises a sampling bottle 1, two valves 2, a quick connector 3, a first detection mechanism 4, and a second detection mechanism 5. The sampling bottle 1 is used to store the collected LPG sample. The two valves 2 are respectively located at the upper and lower ends of the sampling bottle 1. The valves 2 are used to control the flow state of the medium inside the sampling bottle 1. The quick connector 3 is installed on the valves 2 and is used to connect to an external delivery pipeline (not shown in the figure), thereby realizing the introduction and export of LPG. During sampling operations, the LPG can enter the sampling bottle 1 through the valves 2 by connecting to the external delivery pipeline via the quick connector 3. After sampling is completed, the sealing state of the medium inside the sampling bottle 1 is controlled by valve 2 to facilitate subsequent transportation, storage, and testing. Detection mechanism 1 4 is located on the outside of the sampling bottle 1 and is used to detect leaks in the bottle body. When a leak occurs in the sampling bottle 1, detection mechanism 1 4 can drive quick connector 3 to separate from valve 2, thereby cutting off the sampling path. Detection mechanism 2 5 is located in the connection area between the sampling bottle 1 and valve 2 and is used to detect leaks at the connection between valve 2 and sampling bottle 1. When a leak occurs at the connection, detection mechanism 2 5 can drive quick connector 3 to separate from valve 2, thereby reducing the possibility of continuous leakage of liquefied petroleum gas.

[0035] likeFigures 2-8 As shown, the detection mechanism 4 includes a sleeve 41, an upper cap 42, a lower cap 43, a cavity 44, a sliding rod 45, a push rod 46, and a positioning and locking assembly. The sleeve 41 is sleeved on the outside of the sampling bottle 1, and the axis of the sleeve 41 is parallel to the axis of the sampling bottle 1. The sleeve 41 can form a covering structure for the body of the sampling bottle 1. The upper end of the sleeve 41 is provided with the upper cap 42, and the lower end of the sleeve 41 is provided with the lower cap 43. The upper cap 42 is located below the connection position between the upper valve 2 of the sampling bottle 1 and the bottle body, and the lower cap 43 is located above the connection position between the lower valve 2 of the sampling bottle 1 and the bottle body. Neither the upper cap 42 nor the lower cap 43 covers the sample bottle. The connection position between valve 2 and sampling bottle 1 ensures that valve 2 can be installed and disassembled normally. Sleeve 41, upper end cap 42, lower end cap 43 and the outer wall of sampling bottle 1 together form a sealed cavity 44. The cavity 44 is filled with liquid, which is used to transmit pressure changes. In this embodiment, the liquid can be one of silicone oil, antifreeze or hydraulic oil. Sleeve 41 can not only form a cavity 44 for leak detection together with sampling bottle 1, but also protect the outer wall of sampling bottle 1. When sampling bottle 1 is hit, sleeve 41 can shield sampling bottle 1 and reduce the situation where external force directly acts on the outer wall of sampling bottle 1.

[0036] The lower end cap 43 has a through hole extending vertically, which communicates with the cavity 44. A sliding rod 45 is installed inside the through hole and can slide along it. The upper end of the sliding rod 45 is inside the cavity 44, and the lower end extends outside the cavity 44. The upper end of the sliding rod 45 receives the pressure transmitted by the liquid inside the cavity 44. A push rod 46 is provided at the lower end of the sliding rod 45, and the push rod 46 is fixedly connected to the sliding rod 45. The push rod 46 faces the quick connector 3. The quick connector 3 is installed outside the lower valve 2 in an extended position. The push rod 46 is correspondingly set with the quick connector 3. When the sliding rod 45 moves downward, the push rod 46 can push the quick connector 3 to move in the direction of disengaging from the valve 2, thereby separating the quick connector 3 from the valve 2. In this embodiment, the quick connector 3 is a bidirectional self-sealing quick connector 3. After the quick connector 3 is separated from the valve 2, the flow channels on both sides of the quick connector 3 and the valve 2 are automatically closed, thereby reducing the leakage of liquefied petroleum gas.

[0037] like Figures 2-7As shown, the positioning and locking assembly includes two grooves 47 and an elastic telescopic block 48. The two grooves 47 are formed on the inner wall of the sleeve 41. The two grooves 47 are spaced apart along the moving direction of the sliding rod 45. One groove 47 is located near the upper side of the cavity 44, and the other groove 47 is located near the lower side of the cavity 44. The elastic telescopic block 48 is installed at one end of the sliding rod 45 located inside the cavity 44. The elastic telescopic block 48 can move radially along the sliding rod 45. An elastic element is provided between the elastic telescopic block 48 and the sliding rod 45. The elastic element provides an outward extending force for the elastic telescopic block 48, so that the elastic telescopic block 48 always tends to move towards the inner wall of the sleeve 41. When the sliding rod 45 is in the initial state, the elastic telescopic block 48 is engaged in the upper groove 47. At this time, the sliding rod 45 is held in the initial position, preventing the sliding rod 45 from being displaced due to transportation vibration, handling shaking, or external impact. When the cavity When the internal pressure of the sliding rod 45 changes and pushes it to move, the elastic telescopic block 48 gradually disengages from the upper groove 47. When the sliding rod 45 moves to the preset position, the elastic telescopic block 48 engages with the lower groove 47, thus keeping the sliding rod 45 in the triggered state. Through the cooperation between the two grooves 47 and the elastic telescopic block 48, not only can the sliding rod 45 be positioned in the initial state, but it can also be locked after the sliding rod 45 moves, preventing the sliding rod 45 from automatically returning to the initial position. This allows the quick connector 3 to remain disconnected, making it easier for staff to detect faults and carry out subsequent processing.

[0038] like Figures 2-8 As shown, the detection mechanism 2 5 includes two sleeves 2 51, two cavities 2 52, two sliding rods 2 53, two push rods 2 54, and a positioning and locking assembly 2. The two sleeves 2 51 are respectively located at the upper and lower ends of the sampling bottle 1. One sleeve 2 51 is located on the upper side of the upper cap 42 and is fitted onto the outside of the connection area between the upper valve 2 and the sampling bottle 1. The other sleeve 2 51 is located on the lower side of the lower cap 43 and is fitted onto the outside of the connection area between the lower valve 2 and the sampling bottle 1. The two sleeves 2 51 are respectively positioned and locked onto their corresponding locations. The valve 2 and the sampling bottle 1 together form a sealed cavity 52. ​​The two cavities 52 are connected by a connecting pipe 57. The cavity 52 is filled with liquid. The connecting pipe 57 makes the two cavities 52 interconnected. When a leak occurs at the connection between valve 2 and sampling bottle 1 on either side, the leaked liquefied petroleum gas can enter the cavity 52 at the corresponding location and be transmitted to the other cavity 52 through the connecting pipe 57. This allows the detection mechanism 5 to detect the leak in the connection area.

[0039] Both sleeves 51 have through holes 2, which extend along the axis of sleeve 51. Sliding rods 53 are installed in the corresponding through holes 2 and can slide along the through holes 2. One end of the sliding rod 53 is located inside the cavity 52, and the other end is located outside the cavity 52. ​​A push rod 54 is provided at the end of the sliding rod 53 outside the cavity 52. ​​The push rod 54 extends toward the position of the corresponding quick connector 3. The push rod 54 is corresponding to the quick connector 3. When the pressure inside the cavity 52 changes, the sliding rod 53 can be displaced and drive the push rod 54 to move synchronously. The push rod 54 further pushes the quick connector 3 to move in the direction of disengaging from the valve 2, thereby separating the quick connector 3 from the valve 2. Since the two cavities 52 are connected to each other through the connecting pipe 57, whether a leak occurs at the connection between the upper valve 2 and the sampling bottle 1 or at the connection between the lower valve 2 and the sampling bottle 1, the detection mechanism 5 can be triggered.

[0040] like Figures 2-8 As shown, the positioning and locking assembly two includes two grooves 55 and an elastic telescopic block 56. The two grooves 55 are formed on the inner wall of the sleeve 51 and are spaced apart along the moving direction of the sliding rod 53. The elastic telescopic block 56 is installed at one end of the sliding rod 53 located inside the cavity 52. ​​The elastic telescopic block 56 can move in the radial direction of the sliding rod 53. An elastic element is provided between the elastic telescopic block 56 and the sliding rod 53. The elastic element provides elastic force to the elastic telescopic block 56, so that the elastic telescopic block 56 always has a tendency to extend outward. When the sliding rod 53 is in the initial state, the elastic telescopic block 56 engages with the groove 55 near the sleeve 41, thereby locking the sliding rod 53. The second movable rod 53 is positioned; when the internal pressure of the second cavity 52 changes and pushes the second sliding rod 53 to move, the second elastic telescopic block 56 gradually disengages from the groove 55 near the first sleeve 41, and moves with the second sliding rod 53 to the position near the groove 55 in the direction of the quick connector 3. When the second sliding rod 53 reaches the preset stroke, the second elastic telescopic block 56 engages with the groove 55 in the direction of the quick connector 3, thereby locking the second sliding rod 53. By setting the second positioning and locking component, it can be ensured that the second sliding rod 53 maintains its current state after action, avoiding the phenomenon of reset due to vibration or external force. At the same time, it is convenient for the staff to judge whether the device has leaked by the position of the second sliding rod 53.

[0041] The seals are respectively disposed in through hole one and through hole two. In this embodiment, the seals can be O-rings, lip rings or other sealing structures that can achieve dynamic sealing.

[0042] Handle 6 is located on the outside of sleeve 1 41. Handle 6 is set along the length of sampling bottle 1 and can be held and carried by staff. During sampling, transportation and testing operations, staff can lift and transfer sampling bottle 1 through handle 6, thereby improving the convenience of handling sampling bottle 1. At the same time, sleeve 1 41 and sleeve 2 51 are located on the outside of the body of sampling bottle 1 and the connection area of ​​valve 2, respectively. When the device is hit, sleeve 1 41 and sleeve 2 51 can shield sampling bottle 1 and valve 2 connection area, thereby reducing the direct impact of external force on sampling bottle 1 and connection parts.

[0043] The specific working principle of the modular explosion-proof liquefied petroleum gas sampling device of the present invention is as follows: During operation, sampling bottle 1 is first connected to the external liquefied petroleum gas pipeline via quick connector 3. After quick connector 3 is connected to valve 2, the corresponding valve 2 is opened to allow liquefied petroleum gas to enter the sampling bottle 1 for sampling. During normal sampling, sampling bottle 1, valve 2, and connecting parts are all in a sealed state. The liquid inside cavity 1 44 and cavity 2 52 remains stable. Sliding rod 1 45 and sliding rod 2 53 are both in their initial positions. Elastic telescopic block 1 48 is engaged with groove 1 47 on the upper side, and elastic telescopic block 2 56 is engaged with groove 2 55 near sleeve 1 41. Push rod 1 46 and push rod 2 54 do not exert force on quick connector 3, and the sampling process can proceed normally.

[0044] When a crack, pinhole, or other leak occurs in sampling bottle 1, liquefied petroleum gas (LPG) inside the bottle enters cavity 44 from the leak location. Since cavity 44 is sealed, the LPG entering cavity 44 pushes the liquid inside cavity 44 to flow, acting on the end of sliding rod 45 located inside cavity 44. As more LPG enters cavity 44, the force on sliding rod 45 gradually increases. When the force reaches a level that causes sliding rod 45 to move, sliding rod 45 moves downwards along through hole 1. During this movement, elastic telescopic block 48 gradually disengages from the upper groove. The sliding rod 45 slides along the inner wall of the sleeve 41. When the sliding rod 45 moves to the predetermined position, the elastic telescopic block 48 engages with the groove 47 on the lower side to lock the sliding rod 45. At the same time, the sliding rod 45 drives the push rod 46 to move synchronously. The push rod 46 pushes the lower quick connector 3 to move in the direction of disengaging from the valve 2, so that the quick connector 3 is separated from the valve 2. Since the quick connector 3 is a bidirectional self-sealing quick connector 3, after separation, the flow channels on both sides of the quick connector 3 and the valve 2 are automatically closed, thereby cutting off the sampling passage and reducing the possibility of liquefied petroleum gas continuing to flow into the sampling bottle 1 or leaking out from the external pipeline.

[0045] When a leak occurs at the connection between valve 2 and sampling bottle 1, the leaking liquefied petroleum gas enters the corresponding cavity 52 and pushes the liquid inside cavity 52 to flow. Since the two cavities 52 are connected by a connecting pipe 57, the pressure change caused by the leak can be transmitted to the entire detection mechanism 5. The sliding rod 53 inside cavity 52 moves along the through hole 2 after being subjected to pressure, and the elastic telescopic block 56 gradually disengages from the groove 55 near sleeve 41. When the sliding rod 53 moves to the predetermined position, the elastic telescopic block 56 and... The groove 2 55 near the quick connector 3 engages, thus locking it in place. As the sliding rod 2 53 moves, it drives the push rod 2 54 to move. The push rod 2 54 pushes the corresponding quick connector 3 to separate from the valve 2, causing the quick connector 3 to automatically disconnect. Since the two cavities 2 52 form a connected structure, whether a leak occurs at the connection between the upper valve 2 and the sampling bottle 1 or at the lower valve 2 and the sampling bottle 1, the detection mechanism 2 5 can be triggered to activate, thereby enabling the detection and response to leaks in the connection area.

[0046] When staff inspect the device, they can determine the location of the leak by observing the positions of sliding rod 45 and sliding rod 53. When sliding rod 45 is in the locked trigger position while sliding rod 53 remains in the initial position, it can be determined that there is a leak in the sampling bottle 1. When sliding rod 53 is in the locked trigger position, it can be determined that there is a leak in the connection area between valve 2 and sampling bottle 1. Staff can perform targeted maintenance on the device based on the position of the sliding rods, thereby shortening the troubleshooting time and improving maintenance efficiency. Throughout the process, detection mechanism 4 is used to monitor the leakage of the sampling bottle 1, and detection mechanism 5 is used to monitor the leakage in the connection area between valve 2 and sampling bottle 1. The two work together to enable the device to monitor the leakage at different locations during sampling and automatically disconnect the quick connector 3 when a leak occurs, thereby reducing the impact of liquefied petroleum gas leaks.

[0047] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A modular explosion-proof liquefied petroleum gas sampling device, comprising a sampling bottle (1), wherein valves (2) are provided at both the upper and lower ends of the sampling bottle (1), and quick connectors (3) are connected to the valves (2), characterized in that, Also includes: The detection mechanism (4) includes a sleeve (41) fitted on the outside of the sampling bottle (1), an upper end cap (42) and a lower end cap (43) respectively set at the upper and lower ends of the sleeve (41). The sleeve (41), the upper end cap (42), the lower end cap (43) and the outer wall of the sampling bottle (1) form a closed cavity (44), which is filled with liquid. The lower end cover (43) has a through hole that runs vertically through it. A sliding rod (45) is slidably installed in the through hole along the vertical direction. One end of the sliding rod (45) is located inside the cavity (44), and the other end is located outside the cavity (44). A push rod (46) is provided at the end of the sliding rod (45) located outside the cavity (44). The push rod (46) is used to push the quick connector (3) on the lower side to separate from the valve (2). The testing mechanism (4) is also equipped with a positioning and locking component (45) for positioning and locking the sliding rod (45); When the sampling bottle (1) leaks, the leaked liquefied petroleum gas enters the cavity (44) and pushes the sliding rod (45) to move, which in turn causes the push rod (46) to push the quick connector (3) to separate from the valve (2).

2. The modular explosion-proof liquefied petroleum gas sampling device according to claim 1, characterized in that, The sampling bottle (1) is equipped with a detection mechanism (5). The detection mechanism (5) includes two sleeves (51) respectively located on the upper side of the upper end cap (42) and the lower side of the lower end cap (43). The two sleeves (51) are respectively sleeved on the outside of the connection between the corresponding valve (2) and the sampling bottle (1).

3. The modular explosion-proof liquefied petroleum gas sampling device according to claim 2, characterized in that, The two sleeves (51) form a closed cavity (52) with the corresponding valve (2) and sampling bottle (1) respectively. The two sleeves (51) are connected by a connecting pipe (57), and the cavity (52) is filled with liquid.

4. The modular explosion-proof liquefied petroleum gas sampling device according to claim 3, characterized in that, Both sleeves (51) are provided with through holes. A sliding rod (53) is slidably installed in the through hole along the axis of the sleeve (51). One end of the sliding rod (53) is located inside the cavity (52), and the other end is located outside the cavity (52). A push rod (54) is provided at the end of the sliding rod (53) located outside the cavity (52). The push rod (54) is used to push the corresponding quick connector (3) to separate from the valve (2).

5. A modular explosion-proof liquefied petroleum gas sampling device according to claim 4, characterized in that, The sleeve 2 (51) is provided with a positioning and locking component 2 for positioning and locking the sliding rod 2 (53).

6. The modular explosion-proof liquefied petroleum gas sampling device according to claim 1, characterized in that, The positioning and locking assembly includes two grooves (47) formed on the inner wall of the sleeve (41) and an elastic telescopic block (48) set on the sliding rod (45). The two grooves (47) are spaced apart along the moving direction of the sliding rod (45), and the elastic telescopic block (48) can selectively engage with any one of the two grooves (47).

7. A modular explosion-proof liquefied petroleum gas sampling device according to claim 5, characterized in that, The positioning and locking assembly includes two grooves (55) formed on the inner wall of the sleeve (51) and an elastic telescopic block (56) set on the sliding rod (53). The two grooves (55) are spaced apart along the moving direction of the sliding rod (53), and the elastic telescopic block (56) can selectively engage with any one of the two grooves (55).

8. A modular explosion-proof liquefied petroleum gas sampling device according to claim 1, characterized in that, The quick connector (3) is a bidirectional self-sealing quick connector (3).

9. A modular explosion-proof liquefied petroleum gas sampling device according to claim 6, characterized in that, A sealing element is provided between the sliding rod (45) and the through hole.

10. A modular explosion-proof liquefied petroleum gas sampling device according to claim 1, characterized in that, The sampling bottle (1) is provided with a handle (6).

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