Rain cover and closed-circuit sampler

Abstract

The utility model discloses a rain cover and a closed-circuit sampler. The rainproof cover is applied to the closed-circuit sampler, the closed-circuit sampler comprises a sampling barrel and a cover body, and when the cover body closes a sampling opening of the sampling barrel, a closed gap exists between the sampling barrel and the cover body. The rainproof cover comprises a connecting plate and a shielding body, the shielding body is connected with the connecting plate and arranged in the circumferential direction of the connecting plate, and the shielding body protrudes out of the connecting plate in the direction that the outer surface of the connecting plate points to the inner surface of the connecting plate. Wherein the connecting plate is connected with the cover body, the shielding body and the sampling barrel are arranged at intervals, the side, back to the connecting plate, of the shielding body is arranged between the closed gap and the bottom wall of the sampling barrel in the direction from the outer surface to the inner surface, and the extension height of the shielding body is smaller than one third of the height of the sampling barrel. And the connecting plate can open or close the sampling port along with the cover body. The rain cover provided by the utility model can prevent rainwater from accumulating and remaining in the closed gap, so that the reliability of sample detection in the closed-circuit sampler is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of oil sampling and detection, and in particular to a rain cover and a closed-circuit sampler. Background Art

[0002] In the petrochemical and oil analysis fields, closed-circuit samplers are key devices for extracting samples from closed systems, ensuring their representativeness and accuracy. For example, closed-circuit samplers can be used to collect samples from oil pipelines to perform various oil inspections and ensure that the delivered oil meets regulatory requirements.

[0003] In related technologies, a closed-circuit sampler consists of a sampling tube, a cover mounted on top of the tube, and an oil inlet and return valve at the bottom. When the operator opens the oil inlet valve, sample oil flows from the oil pipeline into the sampling tube. The operator then lifts the cover to test the sample oil inside the tube.

[0004] However, when the closed-circuit sampler in the related art is in a state where the cover closes the sampling port, there is a closed gap between the cover and the sampling tube, which causes rainwater to easily accumulate and remain in the closed gap, affecting the oil sampling and detection results in the sampling tube. Summary of the Invention

[0005] The present application provides a rain cover and a closed-circuit sampler, which can prevent rainwater from accumulating and remaining in the closed gap, thereby ensuring the reliability of sample detection in the closed-circuit sampler.

[0006] The technical solutions adopted in this application are as follows:

[0007] According to the first aspect disclosed in the present application, a rain shield is provided. The rain shield is applied to a closed-circuit sampler, which includes a sampling tube and a cover. When the cover closes the sampling port of the sampling tube, a closed gap exists between the sampling tube and the cover. The rain shield includes a connecting plate and a shielding body. The shielding body is connected to the connecting plate and arranged around the circumference of the connecting plate, and the shielding body protrudes from the connecting plate along the outer surface of the connecting plate pointing to the inner surface of the connecting plate. The connecting plate is connected to the cover, and the shielding body is spaced apart from the sampling tube. In the direction from the outer surface to the inner surface, the side of the shielding body facing away from the connecting plate is arranged between the closed gap and the bottom wall of the sampling tube, and the extended height of the shielding body is less than one-third of the height of the sampling tube, so that the connecting plate can open or close the sampling port along with the cover. The rain shield provided by the present application can prevent rainwater from accumulating and remaining in the closed gap, so as to ensure the reliability of sample detection in the closed-circuit sampler.

[0008] The rain cover provided by this application has at least the following beneficial effects:

[0009] When the rain cover provided in the present application is installed on a closed-circuit sampler for use, the connecting plate is used to block rainwater on the top of the closed-circuit sampler, and the shielding body can be used to block rainwater on the side of the closed-circuit sampler, and the side of the shielding body facing away from the connecting plate is arranged between the closed gap and the bottom wall of the sampling tube. In this way, the rain cover formed by the cooperation of the connecting plate and the shielding body can cover the closed gap between the cover body and the sampling tube, forming an effective waterproof barrier on the top of the closed-circuit sampler.

[0010] At the same time, after the rain cover is installed on the closed-circuit sampler, the connecting plate is connected to the cover of the closed-circuit sampler, the shielding body is spaced apart from the sampling barrel, and the extending height of the shielding body in the direction from the outer surface of the connecting plate to the inner surface is less than one-third of the height of the sampling barrel. In this way, when the operator opens the cover to detect the sample in the sampling barrel, the shielding body will not interfere with the sampling barrel, so that the rain cover can move with the cover to open the sampling port of the sampling barrel, which is convenient for the operator to test the sample in the sampling barrel without having to remove the rain cover and then open the cover for detection.

[0011] The rain shield provided by this application thus prevents rainwater from accumulating in the closed gap between the cover and the sampling tube, preventing rainwater from contaminating the sample in the sampling tube. This ensures the purity and representativeness of the sample, provides accurate and reliable test results for subsequent sample quality observation and analysis, and improves the accuracy and credibility of the overall sample analysis results. Furthermore, the rain shield provided by this application does not prevent the operator from opening or closing the cover of the closed-circuit sampler, nor does it affect the sampling operation of the closed-circuit sampler.

[0012] According to a second aspect disclosed herein, a closed-circuit sampler is provided, comprising a sampling tube, a cover, and the aforementioned rain shield. The sampling tube comprises a cavity for holding a sample and a sampling port connected to the cavity. The cover is connected to the sampling tube and covers the sampling port, capable of opening and closing the sampling port. The rain shield is connected to the cover.

[0013] The closed-circuit sampler provided by this application has at least the following beneficial effects:

[0014] The closed-circuit sampler provided in this application, by adding a rain cover, can prevent rainwater from accumulating in the closed gap between the cover and the sampling tube, thereby preventing rainwater from contaminating the sample in the sampling tube, thereby ensuring the purity and representativeness of the sample in the sampling tube, and thereby improving the accuracy and reliability of the overall sample analysis results. At the same time, the rain cover provided in this application does not prevent the operator from opening or closing the cover of the closed-circuit sampler, and does not affect the sampling operation of the closed-circuit sampler. Furthermore, the rain cover can be detachably connected to the cover, or the rain cover can be integrated with the cover, which is not limited by this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a structural schematic diagram of the closed-circuit sampler in this application when the cover is in a closed state.

[0016] Figure 2 It is a structural schematic diagram of the closed-circuit sampler in this application with the cover in an open state.

[0017] Figure 3 This is a schematic diagram of the relationship between the outer diameter of the shielding body and the sampling tube in this application.

[0018] Figure 4 It is a schematic structural diagram of a rain cover in one embodiment of the present application.

[0019] Figure 5 It is a schematic structural diagram of a rain cover in another embodiment of the present application.

[0020] Figure 6 It is a structural schematic diagram of the cover body connected to the fixed bracket in this application.

[0021] Reference numerals:

[0022] 100-closed-circuit sampler; 110-sampling tube; 111-cavity; 112b-sampling port; 120-cover; 130-rain cover; 131-connecting plate; 132-shielding body; 133-connecting hole; 134-seal; 135-guide part; 136-groove; 136a-bottom wall of the groove; 140-snap-fit ​​assembly; 141-tab; 142-snap ring; 150-inlet and outlet valves; 160-fixing bracket; 170-threaded hole; 180-closed gap. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in this application to clearly and completely describe the technical solutions in this application. It should be understood that the drawings in this application are only for illustrative purposes, and for those skilled in the art, the omission of certain well-known structures and their descriptions in the drawings is understandable. At the same time, in the description of this application, if there are terms such as "upper", "lower", "left", "right", etc. that indicate orientation or positional relationships, they are only based on the orientation or positional relationships shown in the drawings, and are simplified descriptions for the convenience of describing this application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Accordingly, the description of this application involves similar descriptions such as "first", "second", etc., which are only used to distinguish different components and cannot be understood as indicating or implying their relative importance, any order, or implicitly indicating the number of technical features indicated.

[0024] In the petrochemical and oil analysis fields, closed-circuit samplers are key devices for extracting samples from closed systems, ensuring their representativeness and accuracy. For example, closed-circuit samplers can be used to collect samples from oil pipelines to perform various oil inspections and ensure that the delivered oil meets regulatory requirements.

[0025] In related art, a closed-circuit sampler includes a sampling tube, a cover mounted on the top of the tube, and a return valve mounted on the bottom. For example, when an operator uses a closed-circuit sampler to test oil, they open the return valve, allowing the sample oil to enter the sampling tube from the closed system through the pipeline. The operator then lifts the cover to test the sample oil. For example, they can use a chemical water detector to determine the moisture content of the sample oil. After completing the test, they open the return valve and quickly return the sample oil from the sampling tube to the closed system. The operator can then choose to further process the sample oil in the closed system based on the test results. If the sample oil passes the test, the operator can deliver the sample oil through the oil pipeline. If the sample oil fails the test, the operator can dehydrate the sample oil before delivering it.

[0026] However, when the closed-circuit sampler in the related art is in a state where the cover body closes the sampling port, a closed gap exists between the cover body and the sampling barrel, causing rainwater to easily accumulate and remain in the closed gap, affecting the sampling and detection results of the sample oil in the sampling barrel, and further affecting the subsequent use of the sample oil. Since the closed-circuit sampler is usually connected to the oil pipeline, the connection method between the closed-circuit sampler and the oil pipeline is relatively complex and has high connection requirements. If the closed-circuit sampler is directly replaced, it will be time-consuming and labor-intensive, and the replacement cost will be high. Therefore, the related art usually sets a rain cover on the outside of the closed-circuit sampler to cover the closed gap of the closed-circuit sampler inside the rain cover to prevent rainwater from remaining.

[0027] However, the rain cover in the related art usually directly covers the entire closed-circuit sampler inside, which means that when the operator detects the sample in the sampling tube, he often needs to open the rain cover first and then open the cover of the sampling tube, making the sample detection operation cumbersome.

[0028] Therefore, the present application provides a closed-circuit sampler that, while maintaining the original operation of the closed-circuit sampler, further prevents rainwater from accumulating and remaining in the closed gap between the cover and the sampling tube, thereby ensuring the accuracy of the sample in the sampling tube and the reliability of the detection and analysis data. The closed-circuit sampler provided by the present application will be described below.

[0029] See also Figures 1 to 2 , Figure 1 1 is a schematic structural diagram of the closed-circuit sampler 100 in the present application, in which the cover 120 is in a closed state. Figure 21 is a structural diagram of the cover 120 of the closed-circuit sampler 100 in the present application in an open state. The present application provides a closed-circuit sampler 100, comprising a sampling barrel 110, a cover 120 and a rain cover 130. The sampling barrel 110 is provided with a cavity 111 for holding a sample and a sampling port 112 connected to the cavity 111. The cover 120 is connected to the sampling barrel 110 and covers the sampling port 112, and the cover can open or close the sampling port 112. The rain cover 130 is connected to the cover 120 to shield the closed gap between the cover 120 and the sampling barrel 110.

[0030] It should be noted that an inlet and outlet valve 150 communicating with the cavity 111 can be provided at the bottom of the sampling cylinder 110 to facilitate the entry and exit of the sample into the cavity 111 of the sampling cylinder 110. Furthermore, the sampling cylinder 110 can be configured as a glass cylinder, allowing the operator to visually observe the sample's color or flow state as it enters the sampling cylinder 110 to preliminarily determine whether the sample is abnormal. The sidewalls of the sampling cylinder 110 can be provided with graduated lines to facilitate the operator's reading of the sample's sampling scale.

[0031] The cover 120 can be connected to the sampling barrel 110 via a hinge and covers the sampling port 112 of the sampling barrel 110 , so that an operator can open or reset the cover 120 to open or close the sampling port 112 .

[0032] The rain cover 130 can be connected to the cover body 120 to cover the top of the closed-circuit sampler 100 and shield the closed gap between the cover body 120 and the sampling tube 110. In this way, the rain cover 130 can prevent rainwater from contacting the cover body 120, and the rain cover 130 can be used to guide rainwater away from the cover body 120 to prevent rainwater from accumulating in the closed gap between the cover body 120 and the sampling tube 110.

[0033] For example, the closed-circuit sampler 100 can be installed on an aircraft refueling truck. When the truck fills an aircraft's fuel tank with aviation fuel, the closed-circuit sampler 100 can be used to sample and test the added aviation fuel to ensure that the fuel meets the requirements. Thus, by adding a rain cover 130 to the closed-circuit sampler 100, rain cover 130 can be used to block rainwater from contacting the top of the closed-circuit sampler 100, thereby preventing rainwater from accumulating in the closed gap between the cover 120 and the sampling tube 110. This ensures the accuracy of the aviation fuel testing results, improves the efficiency of aircraft refueling operations, and avoids flight delays.

[0034] See also Figures 1 to 3 , Figure 1 1 is a schematic structural diagram of the closed-circuit sampler 100 in the present application, in which the cover 120 is in a closed state. Figure 2 1 is a schematic structural diagram of the closed-circuit sampler 100 in the present application, in which the cover 120 is in an open state. Figure 3Schematic diagram of the relationship between the outer diameter of the shielding body and the sampling tube in the present application. As an example, in order to cooperate with the closed-circuit sampler 100 and avoid interfering with the opening or closing of the cover 120 of the closed-circuit sampler 100, the present application also provides a rain cover 130. The rain cover 130 includes a connecting plate 131 and a shielding body 132. The connecting plate 131 has an inner surface and an outer surface that are arranged relative to each other along the thickness direction of the connecting plate 131. The shielding body 132 is connected to the connecting plate 131 and is arranged around the circumference of the connecting plate 131. The shielding body 132 is arranged to protrude from the connecting plate 131 in the direction from the outer surface to the inner surface. Among them, the connecting plate 131 is connected to the cover body 120, and the shielding body 132 is spaced apart from the sampling tube 110. In the direction from the outer surface of the connecting plate 131 to the inner surface, the side of the shielding body 132 facing away from the connecting plate 131 is arranged between the closed gap and the bottom wall of the sampling tube 110, and the extended height of the shielding body 132 is less than one-third of the height of the sampling tube 110, so that the connecting plate 131 can open or close the sampling port 112 along the cover body 120.

[0035] It should be noted that the thickness direction of the connecting plate 131 can be set along the Y direction in the figure. The outer surface of the connecting plate 131 can be set in the direction indicated by the Y direction, and the inner surface of the connecting plate 131 can be set in the direction indicated by the opposite direction of Y. The connecting plate 131 can be set in any shape such as a circle or a square, and this application does not impose any restrictions. Among them, the connecting plate 131 is used to block rainwater from the top of the closed-circuit sampler 100, and the shielding body 132 is arranged in the circumference of the connecting plate 131, which can be used to block rainwater from the side of the closed-circuit sampler 100. At the same time, the extension length of the shielding body 132 in the opposite direction of Y exceeds the position of the closed gap between the sampling barrel 110 and the cover body 120. In this way, the rain cover 130 formed by the cooperation of the connecting plate 131 and the shielding body 132 can cover the closed gap between the cover body 120 and the sampling barrel 110, thereby preventing rainwater from accumulating and contaminating the sample in the sampling barrel.

[0036] Furthermore, after the rain cover 130 is installed on the closed-circuit sampler 100, to prevent the rain cover 130 from interfering with the opening or closing of the cover 120, the shield 132 can be spaced radially from the sampling barrel 110, with the radial direction being along the X-direction. Furthermore, the shield 132's extension height in the opposite Y-direction can be set to be less than one-third of the height of the sampling barrel 110, while ensuring that the shield 132's extension height still meets the requirement of closing the gap between the cover 120 and the sampling barrel 110. Thus, after the rain cover 130 is installed on the closed-circuit sampler 100, a gap is provided between the shield 132 and the sampling barrel 110 in the X-direction, while the shield 132 is shorter than the sampling barrel 110 in the Y-direction. After the connecting plate 131 is fixed to the cover 120, when the operator opens the cover 120, the shielding body 132 will not interfere with the sampling tube 110, so that the rain cover 130 can move with the cover 120 to open the sampling port 112 of the sampling tube 110, making it easier for the operator to test the sample in the sampling tube 110. Therefore, when the operator tests the sample in the sampling tube 110, there is no need to remove the rain cover 130 and then open the cover 120 for testing, thereby simplifying the sampling and testing steps.

[0037] Therefore, when used with the closed-circuit sampler 100, the rain cover 130 provided in the present application can form an effective waterproof barrier on the top of the closed-circuit sampler 100 through the mutual cooperation between the connecting plate 131 and the shielding body 132, so as to prevent rainwater from accumulating in the closed gap between the cover 120 and the sampling tube 110, and prevent rainwater from contaminating the sample in the sampling tube 110, thereby ensuring the purity and representativeness of the sample, providing accurate and reliable test results for subsequent sample quality observation and analysis, and improving the accuracy and credibility of the overall sample analysis results. At the same time, the rain cover 130 provided in the present application does not prevent the operator from opening or closing the cover 120 of the closed-circuit sampler 100, and does not affect the original sampling operation of the closed-circuit sampler 100. That is, when the operator opens the cover 120, he can simultaneously move the rain cover 130, without having to first disassemble the rain cover 130 and then open the cover 120 to test the sample.

[0038] See also Figure 1 As an example, to ensure that the rain cover 130 can cover the closed gap between the sampling tube 110 and the cover 120, and further prevent the rain cover 130 and the sampling tube 110 from interfering with each other, the extended height of the shielding body 132 in the direction from the outer surface to the inner surface is set to H1, and the height of the sampling tube 110 is set to H2. Wherein, H1 is greater than or equal to one twelfth of H2, and H1 is less than or equal to one eighth of H2.

[0039] It should be noted that the closed gap 180 is typically located near the top of the sampling tube 110. H1 is greater than or equal to one-twelfth of H2. This allows for the thickness of the cover 120 to be taken into account, allowing the rain shield 130 to cover the closed gap and prevent it from being exposed. If H1 is less than or equal to one-eighth of H2, interference between the rain shield 130 and the sampling tube 110 can be avoided when the operator opens or closes the cover 120.

[0040] Taking the closed-circuit sampler on an aircraft refueling truck as a reference, the height H2 of the sampling cylinder 110 is typically set between 250mm and 500mm. If H2 is set to 250mm, the height H1 of the shielding body 132 can be set between 20mm and 32mm. If H2 is set to 350mm, the height H1 of the shielding body 132 can be set between 30mm and 45mm. Optionally, H1 includes but is not limited to 20mm, 25mm, 30mm, 35mm, 40mm, and 45mm. When the height of the sampling cylinder 110 changes, the height H1 of the shielding body 132 can be adjusted to adapt to the height of the closed gap and H2. This application does not elaborate on this.

[0041] In addition, see Figure 3 , Figure 3 It is a schematic diagram of the relationship between the outer diameter of the shielding body and the sampling cylinder in this application. Taking the X direction in the figure as an example, a spacing distance d1 is also provided between the shielding body 132 and the sampling cylinder 110 to avoid interference between the shielding body 132 and the sampling cylinder 110. Taking the closed-circuit sampler on the aircraft refueling truck as a reference, the sampling cylinder 110 is usually set as a cylindrical cylinder, and the outer diameter of the sampling cylinder is set to R2. The shielding body 132 can be set in an annular shape, and the outer diameter of the shielding body 132 is set to R1, R1>R2, and the difference between R1 and R2 is d1. Usually, R1 is set between 150mm and 160mm, then d1 can be set between 20mm and 40mm, so that R1 is set between 180mm and 200mm. Optionally, R1 includes but is not limited to 180mm, 185mm, 190mm, 195mm, and 200mm, etc., which will not be elaborated in this application. In addition, when the cover 120 and the sampling barrel 110 are connected by a hinge, the gap between the shielding body 132 and the sampling barrel 110 can also avoid the connection hinge between the cover 120 and the sampling barrel 110 to avoid movement interference.

[0042] In this way, after the rain cover 130 is installed on the closed-circuit sampler 100, the closed gap can be covered by the cooperation of the connecting plate 131 and the shielding body 132, and when the rain cover 130 moves with the cover body 120, the extended height of the shielding body 132 is much smaller than the height of the sampling tube 110, and there is a gap between the shielding body 132 and the sampling tube 110, so the shielding body 132 will not interfere with the movement of the sampling tube 110, and the closed-circuit sampler 100 can maintain the original sampling operation.

[0043] In some embodiments, the outer diameter of the connecting plate 131 can be set to the same size as the outer diameter of the shielding body 132, so that after the connecting plate 131 is connected to the cover body 120, the edge of the connecting plate 131 can be set beyond the edge of the cover body 120. In this way, rainwater can be first directed away from the cover body 120 through the connecting plate 131, and then directed away from the sampling tube 110 through the shielding body 132, so as to prevent rainwater from accumulating in the closed gap and preventing rainwater from contaminating the sample in the sampling tube 110. Alternatively, the outer diameter of the connecting plate 131 can also be set larger than the outer diameter of the shielding body 132 to direct rainwater away from the top of the closed-circuit sampler 100, and this application is not limited thereto. As an example, the rain cover 130 and the closed-circuit sampler 100 can be respectively set as cylinders, wherein the diameter of the connecting plate 131 can be set larger than the diameter of the cover body 120, the shielding body 132 can be connected to the inner surface of the connecting plate 131, and the inner diameter of the shielding body 132 is set larger than the outer diameter of the sampling tube 110, so as to be spaced apart from the sampling tube 110.

[0044] In some embodiments, to facilitate installation of the rain cover 130 , the connecting plate 131 and the cover body 120 may be fixed by bonding, threading, or plugging, and this application does not impose any restrictions thereon.

[0045] See also Figure 4 , Figure 4 1 is a schematic structural diagram of a rain cover 130 in one embodiment of the present application. In some embodiments, to further guide rainwater away from the closed-circuit sampler 100, a guide portion 135 is provided on the outer surface of the connecting plate 131. The guide portion 135 is tilted in a direction from the outer surface to the inner surface.

[0046] It should be noted that the guide portion 135 may be a structure such as a guide rib or a guide groove, so that rainwater can flow along the direction of the guide portion 135 to leave the closed-circuit sampler 100, thereby preventing rainwater from accumulating on the top of the closed-circuit sampler 100. The number of guide portions 135 provided is not limited by this application and can be provided based on the size of the rain cover 130. Multiple guide portions 135 can be distributed at intervals to guide rainwater at different locations away from the closed-circuit sampler 100.

[0047] In other embodiments, the outer surface of the connecting plate 131 can also be set as an arc surface, with the convex surface of the arc surface facing away from the inner surface to divert rainwater, and this application does not limit this. Of course, in other embodiments, the outer surface of the connecting plate 131 can also be set as a flat surface, and this application does not limit this.

[0048] In some embodiments, to further divert rainwater away from the closed-circuit sampler 100, the shielding body 132 may be disposed along the Y direction toward the outside of the sampling tube 110 to divert rainwater to a side away from the sampling tube 110. In other embodiments, the shielding body 132 may also be disposed vertically along the Y direction to block rainwater from the sides of the closed-circuit sampler 100, and this application is not limited thereto.

[0049] In addition, when the outer surface of the connecting plate 131 is set to an arc-shaped convex surface, and the shielding body 132 is also inclined to the side away from the sampling tube 110, the rain cover 130 formed in this way can also guide the external gas through the arc structure of the rain cover 130 after being installed on the closed-circuit sampler 100, so as to reduce the shaking amplitude of the rain cover 130 caused by wind force, thereby ensuring the connection stability between the rain cover 130 and the closed-circuit sampler 100.

[0050] See also Figure 5 and Figure 6 , Figure 5 This is a schematic structural diagram of a rain cover in another embodiment of the present application. Figure 6 1 is a schematic diagram of the structure of the cover 120 connected to the fixed bracket 160 in the present application. In some embodiments, when the sampling tube 110 is configured as a glass tube or other structure, to facilitate the assembly of the sampling tube 110 and the cover 120, a fixed bracket 160 can be provided on the sampling tube 110. The fixed bracket 160 is fixed to the outer wall of the sampling tube 110 via multiple legs. In this case, the cover 120 can be hinged to the fixed bracket 160 to open and close relative to the sampling tube 110.

[0051] At the same time, a snap-fit ​​assembly 140 may be provided between the cover 120 and the fixed bracket 160. The snap-fit ​​assembly 140 snaps together and secures the cover 120 and the sampling barrel 110 when they are closed, preventing impurities from entering the sampling barrel 110 and preventing the sample in the sampling barrel 110 from volatilizing. The snap-fit ​​assembly 140 separates when the cover 120 and the sampling barrel 110 are opened, facilitating the operator's inspection of the sample in the sampling barrel 110 through the sampling port 112 of the sampling barrel 110. The snap-fit ​​assembly 140 may have a variety of structures, including a tongue and slot, or two elastic snap-fit ​​components, and this application does not impose any limitations thereto. As an example, the fastening assembly 140 includes a latch 141 and a snap ring 142. The sample plate is provided with a threaded hole 170. The latch 141 can be fixedly connected to the threaded hole 170 of the cover 120 via a bolt. The fixing bracket 160 is provided with a snap ring 142. The latch 141 cooperates with the snap ring 142 to achieve the fastening and separation of the cover 120 and the fixing bracket 160. In addition, the latch 141 can be tilted in the opposite direction Y to divert rainwater that falls on the latch 141 and prevent it from falling into the sampling tube 110.

[0052] exist Figure 6 Based on the structure shown in Figure 5 To facilitate assembly of the rain shield 130 and the cover 120, the outer surface of the connecting plate 131 may be provided with a connecting hole 133 extending through the inner surface. The connecting hole 133 is used to install a fastener connecting the connecting plate 131 and the cover 120. It should be noted that the connecting hole 133 on the connecting plate 131 can be aligned with the threaded hole 170 on the cover 120 for securing the tongue 141. In this way, only one bolt needs to be inserted through the connecting hole 133 and the threaded hole 170 in sequence to secure the connecting plate 131 and the tongue 141 to the cover 120, respectively. This is simple, convenient, and space-saving.

[0053] Of course, the connection holes 133 on the connection plate 131 can also be aligned with other through holes on the cover 120 so that the connection plate 131 can be fixed together using the fasteners originally required to be installed on the cover 120. This is not a limitation in this application. In this way, when assembling the rain cover 130 and the cover 120, there is no need to change the structure of the cover 120 in the closed-circuit sampler 100. The existing holes in the cover 120 and the original fasteners can be used to complete the assembly of the rain cover 130 and the cover 120. In this way, the rain cover 130 can adapt to the original structure of the cover 120 in the closed-circuit sampler 100, and the rain cover 130 can also be opened according to the different specifications of the cover 120 to adapt to the installation of closed-circuit samplers 100 of various specifications.

[0054] As an example, when the rain cover 130 is installed with the cover 120 using fasteners such as bolts, the operator can first clean the top of the closed-circuit sampler 100 to ensure that there are no debris or oil stains on the cover 120 and the connection between the cover 120 and the sampling tube 110, so that the connecting plate 131 can fit tightly with the cover 120. After cleaning, the operator completely covers the top of the closed-circuit sampler 100 with the rain cover 130, aligns the connecting hole 133 of the connecting plate 131 with the top hole of the closed-circuit sampler 100, and uses the original fasteners of the closed-circuit sampler 100 to fix the connecting plate 131 to the cover 120. If the rain cover 130 needs to be replaced, it is only necessary to remove the fasteners and replace the rain cover 130.

[0055] In this way, the installation and removal of the rain cover 130 and the cover 120 are simple and quick, and can be completed by the operator without complex tools or professional skills, thereby improving the operator's operating efficiency and convenience. In addition, the maintenance cost of the rain cover 130 installed in this way is relatively low. When the closed-circuit sampler 100 is not used for a long time, it can be considered to remove the rain cover 130 and store it separately to extend the service life of the rain cover 130.

[0056] See also Figure 5In some embodiments, when the connection hole 133 is formed in the rain cover 130 and connected to the cover 120, to prevent rainwater from passing through the connection hole 133 and falling into the cover 120, and then entering the sampling tube 110 as the cover 120 opens and closes, the rain cover 130 further includes a seal 134. The seal 134 is disposed on the inner wall of the connection hole 133 to seal the connection gap between the connection hole 133 and the fastener. It should be noted that the seal 134 may be a sealing ring, an elastic member, or a special sealing material, etc., and this application does not limit this.

[0057] In some embodiments, to further enhance the rainproof effect of the rain shield 130, a seal is also formed between the inner surface of the connecting plate 131 and the cover 120. For example, a glue layer may be provided between the inner surface of the connecting plate 131 and the cover 120 to form a seal, or an elastic pad may be provided between the inner surface of the connecting plate 131 and the cover 120 to form a seal by squeezing the elastic pad and deforming it, or a concave-convex structure that fits in with each other may be provided between the inner surface of the connecting plate 131 and the cover 120 to form a seal by fitting the concave-convex structure. This is not limited in the present application. Thus, through the seal between the connecting plate 131 and the cover 120, an effective waterproof barrier can be formed between the connecting plate 131 and the cover 120 to prevent rainwater from eroding the cover 120 and prevent rainwater from seeping into the sampling tube 110.

[0058] In other embodiments, the rain cover 130 and the cover 120 may be integrated into one body to further improve the sealing between the rain cover 130 and the cover 120. In some embodiments, the cover 120 may be eliminated and replaced by the rain cover 130, which is not limited in this application.

[0059] See also Figure 5 In some embodiments, in order to facilitate the accommodation of the snap-fit ​​assembly 140 set between the cover body 120 and the fixed bracket 160, the shielding body 132 is provided with a groove 136 that is recessed along the inner surface toward the outer surface. The groove 136 is used to accommodate the snap-fit ​​assembly 140 between the cover body 120 and the sampling tube 110. When the snap-fit ​​assembly 140 is opened, the cover body 120 drives the connecting plate 131 to move to open the sampling tube 110.

[0060] It should be noted that the groove 136 is provided with an opening in the opposite direction of Y. When rainwater enters the groove 136, the rainwater can be guided to flow out of the opening through the inner wall of the groove 136, and will not enter between the cover body 120 and the rain cover 130, thereby preventing rainwater from flowing into the sampling tube 110 when the cover body 120 is opened and closed.

[0061] As an example, to facilitate avoiding the snap-fit ​​assembly 140 and diverting rainwater, the bottom wall 136a of the groove can also be configured to be arc-shaped, with the arc-shaped concave surface facing the opening of the groove 136. In this way, when the snap-fit ​​assembly 140 is placed in the groove 136, rainwater can flow out from the two side walls of the groove 136 along the arc-shaped concave surface, and the tongue 141 in the snap-fit ​​assembly 140 itself can also divert rainwater, thereby preventing rainwater from accumulating between the cover 120 and the sampling tube 110.

[0062] See also Figure 5 In some embodiments, in order to meet the requirement of the groove 136 to avoid the snap-fit ​​assembly 140 and enable the rain cover 130 to also shield the closed gap 180 between the cover body 120 and the sampling tube 110 at the groove 136, the distance between the bottom wall 136a of the groove and the connecting plate 131 is set to d2, and d2 is less than or equal to half of the extension height H1 of the shielding body 132. In this way, the groove 136 can avoid the snap-fit ​​assembly 140 and shield the closed gap 180 to prevent rainwater from accumulating in the closed gap 180. Optionally, when H1 is set to 35mm, d2 can be less than 17mm and must be able to meet the requirement of shielding the closed gap. Optionally, the depth of the groove 136 can be 25mm to 30mm, which is not limited in this application.

[0063] As an example, to facilitate the production of the rain shield 130 and meet its requirements for rain protection and interference prevention, this application provides the following specific dimensions of the rain shield 130 for reference. Specifically, the rain shield 130 can be configured as a cylinder, with the connecting plate 131 forming the top surface of the cylinder and the shielding body 132 forming the side surfaces of the cylinder. The outer diameter of the rain shield 130 can be set between 160 mm and 200 mm. The height of the rain shield 130 can be set between 30 mm and 40 mm. The connecting plate 131 is provided with a connecting hole 133, with a diameter between 3 mm and 9 mm. The connecting hole 133 can be located at the center of the connecting plate 131 or at another location, and this application does not impose any restrictions. The shielding body 132 is provided with a groove 136, with a gap of at least 5 mm between the bottom wall 136a of the groove and the inner surface of the connecting plate 131, and the width of the groove 136 can be set between 20 mm and 24 mm.

[0064] Specifically, in some embodiments, the outer diameter of the connecting plate 131 can be set to 180 mm, and the shielding body 132 is arranged along the circumference of the connecting plate 131 and is the same as the outer diameter of the connecting plate 131. The height of the rain cover 130 is set to 35 mm, the depth of the groove 136 is set to 30 mm, the width of the groove 136 is set to 22 mm, and the diameter of the connecting hole 133 is set to 6 mm. In other embodiments, the outer diameter of the connecting plate 131 can be set to 160 mm, and the shielding body 132 is arranged along the circumference of the connecting plate 131 and is the same as the outer diameter of the connecting plate 131. The height of the rain cover 130 is set to 30 mm, the depth of the groove 136 is set to 20 mm, the width of the groove 136 is set to 20 mm, and the diameter of the connecting hole 133 is set to 3 mm. In other embodiments, the outer diameter of the connecting plate 131 can be set to 200 mm, and the shielding body 132 is arranged along the circumference of the connecting plate 131 and is the same as the outer diameter of the connecting plate 131. The height of the rain cover 130 is set to 40 mm, the depth of the groove 136 is set to 30 mm, the width of the groove 136 is set to 24 mm, and the aperture of the connecting hole 133 is set to 9 mm. Of course, the rain cover 130 can also be set to different parameters according to the specifications of the closed-circuit sampler 100, and this application does not impose any restrictions. As long as the connecting plate 131 is slightly larger than the cover 120 in the closed-circuit sampler 100, the shielding body 132 is spaced apart from the side wall of the sampling tube 110, and rainwater can be diverted away from the closed-circuit sampler 100, and it is also necessary to ensure that the shielding body 132 does not interfere with the movement of the sampling tube 110, this application will not elaborate on this.

[0065] In some embodiments, to facilitate movement of the rain shield 130 with the cover 120 to open or close the sampling tube 110, the rain shield 130 further includes a handle connected to the shield 132 or the connecting plate 131. When the handle is connected to the shield 132, it protrudes from the shield 132 to divert rainwater and prevent its accumulation. When the handle is connected to the connecting plate 131, it also protrudes from the connecting plate 131 to divert rainwater and prevent its accumulation. In this way, the operator can grasp the handle and apply force to the handle to cause the rain shield 130 to move the cover 120 to open or close the sampling port 112.

[0066] In some embodiments, to extend the service life of the rain cover 130, the rain cover 130 is made of a high-strength, corrosion-resistant, and weather-resistant material. For example, the rain cover 130 can be made of stainless steel to ensure that the rain cover 130 can maintain stability and durability under various adverse weather conditions.

Claims

1. A rain cover for a closed-circuit sampler, comprising a sampling barrel and a cover, wherein the sampling barrel is provided with a cavity for holding a sample and a sampling port communicating with the cavity, the cover being connected to the sampling barrel and covering the sampling port, wherein a closed gap exists between the sampling barrel and the cover when the cover closes the sampling port, and wherein: The rain cover comprises: A connecting plate (131) having an inner surface and an outer surface arranged opposite to each other along a thickness direction of the connecting plate (131); and a shielding body (132) connected to the connecting plate (131) and arranged around the circumference of the connecting plate (131), and the shielding body (132) protrudes from the connecting plate (131) in a direction from the outer surface to the inner surface; The connecting plate (131) is connected to the cover body, and the shielding body (132) is spaced apart from the sampling barrel. In the direction from the outer surface to the inner surface, the shielding body (132) is arranged between the closed gap and the bottom wall of the sampling barrel on the side facing away from the connecting plate (131), and the extending height of the shielding body (132) is less than one-third of the height of the sampling barrel, so that the connecting plate (131) can open or close the sampling port along with the cover body.

2. The rain cover according to claim 1, wherein: In the direction from the outer surface to the inner surface, the extending height of the shielding body (132) is greater than or equal to one twelfth of the height of the sampling tube, and the extending height of the shielding body (132) is less than or equal to one eighth of the height of the sampling tube.

3. The rain cover according to claim 2, characterized in that: In a direction from the outer surface to the inner surface, the extending height of the shielding body (132) is set between 20 mm and 45 mm.

4. The rain cover according to claim 3, characterized in that: The spacing distance between the shielding body (132) and the sampling tube is set to d1, and d1 is set between 20 mm and 40 mm.

5. The rain cover according to claim 1, wherein: The connecting plate (131) forms a sealing fit with the cover body.

6. The rain cover according to claim 5, characterized in that: The outer surface of the connecting plate (131) is provided with a connecting hole (133) penetrating the inner surface of the connecting plate (131), and the connecting hole (133) is used to install a fastener connected between the connecting plate (131) and the cover body. The rain cover also includes a sealing member (134), and the sealing member (134) is provided on the inner wall of the connecting hole (133) to seal the closed gap between the connecting hole (133) and the fastener.

7. The rain cover according to claim 1, wherein: The outer surface of the connecting plate (131) is provided with a guide portion (135), and the guide portion (135) is arranged obliquely along the direction from the outer surface to the inner surface; and / or, the outer surface of the connecting plate (131) is arranged as an arcuate surface, and the convex surface of the arcuate surface is arranged to face away from the inner surface.

8. The rain cover according to claim 1, wherein: The shielding body (132) is vertically arranged along the direction from the outer surface to the inner surface, and / or the shielding body (132) is inclined toward the outside of the sampling tube along the direction from the outer surface to the inner surface.

9. The rain cover according to claim 1, wherein: The shielding body (132) is provided with a groove (136) that is recessed along the inner surface and points toward the outer surface. The groove (136) is used to accommodate a snap-fit ​​assembly between the cover body and the sampling tube. When the snap-fit ​​assembly is opened, the cover body drives the connecting plate (131) to move to open the sampling port.

10. The rain cover according to claim 9, characterized in that: The bottom wall (136a) of the groove is arranged in an arc shape, and the concave surface of the arc is arranged toward the opening of the groove (136).

11. The rain cover according to claim 9, wherein: In the direction from the outer surface to the inner surface, the bottom wall (136a) of the groove is arranged beyond the closed gap, and the distance between the bottom wall (136a) of the groove and the connecting plate (131) is set to d2, and d2 is less than or equal to half of the extension height of the shielding body (132).

12. A closed-circuit sampler, characterized in that: It comprises a sampling tube (110), a cover (120) and a rain cover according to any one of claims 1 to 11; The sampling cylinder (110) is provided with a cavity (111) for holding a sample and a sampling port (112) communicating with the cavity (111); The cover (120) is connected to the sampling cylinder (110) and covers the sampling port (112), and the cover (120) can open or close the sampling port (112); The rainproof cover is connected to the cover body (120).

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