Online monitoring equipment for petroleum pollution of water body

Abstract

The utility model discloses water body petroleum pollution on-line monitoring equipment which comprises a supporting platform, a probe and a sampling box, a mounting hole is formed in the middle of the supporting platform, and the probe is vertically mounted in the mounting hole; at least two vertical first guide rails are arranged at the bottom of the supporting platform; the sampling box is mounted on the first guide rail in a sliding manner; the sampling box is connected with the supporting platform through a lifting mechanism. Static measurement is carried out after sampling is carried out through the sampling box, so that the monitoring accuracy is improved; automatic sampling and drainage of the sampling pool are achieved through the lifting mechanism and the automatic gate, the automation degree of the device is improved, and the device can be applied to a field unmanned monitoring station.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pollution monitoring, in particular to an online monitoring device for water body oil pollution. Background Art

[0002] Oil can easily cause water pollution during its extraction and transportation. Therefore, effective monitoring and management of oil pollutants in various water bodies, especially the development of real-time dynamic monitoring technology, has great social significance and economic value.

[0003] Announcement No.: CN212722849U discloses a probe-type online monitoring device for petroleum pollutants in water, comprising a monitoring box, a flow cell fixedly mounted on the inner bottom of the monitoring box, and a quartz window fixedly mounted on the top of the flow cell. This probe-type online monitoring device for petroleum pollutants in water is provided with a positioning block, a push spring, and a pull ring. When the monitoring probe needs to be maintained or repaired, the pull ring can be pulled away from the mounting block, causing the pull rod to pull the push plate and the positioning block to move to the left and right until the positioning block separates from the mounting block. The monitoring head can then be removed. After maintenance or repair is completed, the mounting block can be extended into the mounting slot, and then the positioning block can be extended into the interior of the mounting block. At this point, the monitoring head can be installed.

[0004] This existing technology uses flow-through measurement, but flowing water is not conducive to monitoring, resulting in low accuracy of this measurement method. In addition, it is difficult for existing monitoring devices to adjust the relative position of the probe and the water surface, further affecting the accuracy of monitoring.

[0005] Announcement No.: CN115166181B, discloses an early warning device and method for a water pollution source monitoring device, including a lifting seat, on which a longitudinal adjustment component, a transverse adjustment component, a rotating component and a sampling component are provided. The longitudinal adjustment component is arranged on the lifting seat, the transverse adjustment component is arranged on the longitudinal adjustment component, the rotating component is arranged on the transverse adjustment component, and the sampling component is arranged on the rotating component. The sampling component includes a sampling cylinder, a power part, a sampling part and a release part. The sampling part includes a reset part, a pumping cylinder, a transfer box, a pumping rod and a piston. By obtaining the time series of water quality parameters, transforming calculations, determining abnormal modes, issuing early warnings and tracing the fluorescence response, negative pressure is generated in the test tube. The negative pressure can facilitate the water sample to enter more smoothly and protect the intact internal structure of the water sample.

[0006] This existing technology can be used to monitor oil pollution in water bodies, but it can only be deployed on the riverside and cannot be deployed in the river.

[0007] Publication number CN115060868A discloses a water area monitor comprising a photovoltaic panel, a dome camera fixedly connected to the bottom of the panel, a control cover disposed at the bottom of the dome camera, a float movably connected to the bottom of the control cover, and a water quality monitoring sensor fixedly mounted on the bottom of the float. By installing the water quality monitoring sensor, the water quality of the river can be monitored. The camera's characteristics can then be used to capture a comprehensive image of the surrounding environment. The photovoltaic panel then charges the battery compartment, extending the battery life. This results in a high volume of monitored data, a short cycle time, and a long battery life.

[0008] This existing technology is arranged for flow monitoring in the river and cannot guarantee detection accuracy.

[0009] In short, the technical solutions of the above-disclosed technologies, the technical problems to be solved and the beneficial effects produced are all different from those of the present utility model. Regarding the more technical features, technical problems to be solved and the beneficial effects of the present utility model, the above-disclosed technical documents do not provide any technical inspiration. Utility Model Content

[0010] In view of the above-mentioned defects in the prior art, the purpose of the present invention is to provide an online monitoring device for oil pollution in water bodies, improve the accuracy of monitoring, and enable the device to be deployed at any location in the river for static detection.

[0011] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0012] An online monitoring device for oil pollution in water bodies includes a support platform, a probe and a sampling box; a mounting hole is provided in the middle of the support platform, and the probe is vertically installed in the mounting hole; at least two vertical first guide rails are provided at the bottom of the support platform; the sampling box is slidably installed on the first guide rails; and the sampling box is connected to the support platform via a lifting mechanism.

[0013] Furthermore, an overflow plate is provided in the sampling box, and an equipment platform is provided at the front end of the sampling box;

[0014] Specifically, the right side of the overflow plate is a water inlet channel that runs through from top to bottom, and the left side is a sampling pool;

[0015] Specifically, a drain outlet is provided at the left end of the sampling pool, and an automatic gate is installed on the drain outlet.

[0016] Furthermore, the automatic gate includes a second motor and a blocking door;

[0017] Specifically, the front and rear ends of the drain outlet are provided with second guide rails adapted to the baffle door, the baffle door is connected to the second guide rails via a sliding limit sealing mechanism, and the front end of the baffle door is provided with a rack;

[0018] Specifically, the second motor is fixedly installed on the equipment platform, and an output end of the second motor is provided with a driving gear meshing with a rack.

[0019] Furthermore, the sliding limiting sealing mechanism includes an upper pressure-applying protrusion, a lower pressure-applying protrusion, a limiting protrusion, a sealing start groove, and a sealing strip;

[0020] Specifically, the upper pressure protrusion, the lower pressure protrusion, and the limiting protrusion form a set of sliding limiting mechanisms. The sliding limiting mechanisms are provided in two groups, which are respectively located at the front end of the stop door and the corresponding second guide rail, and the rear end of the stop door and the corresponding second guide rail.

[0021] Specifically, the second guide rail is in a U-shaped double-forked wall shape, including a first forked wall and a second forked wall, wherein the first forked wall is located at an end away from the sampling pool, and the second forked wall is located at an end close to the sampling pool, a lower pressure protrusion is provided at the lower end of the inner wall of the first forked wall, and at least two limiting protrusions are provided on the inner wall of the second forked wall;

[0022] Specifically, the second fork wall is embedded in the bottom plate of the sampling pool, the inner wall of the second fork wall is flush with the left end surface of the bottom plate, and a sealing strip is fixedly provided between the inner wall of the second fork wall and the left end surface of the bottom plate;

[0023] Specifically, the end surface of the blocking door close to the second fork wall is provided with a sealing start groove, the number of the sealing start grooves is the same as that of the limiting protrusions and they correspond one to one, and the end surface of the blocking door close to the first fork wall is provided with an upper pressure protrusion;

[0024] Specifically, when the lower pressure protrusion contacts the bottom of the baffle, the upper pressure protrusion contacts the upper end of the inner wall of the first fork wall, and the limiting protrusion enters the sealing start groove. Under the action of the upper and lower pressure protrusions, the baffle is pressed onto the sealing strip to achieve sealing.

[0025] Furthermore, the bottom plate of the sampling pool is inclined toward the drain outlet.

[0026] Furthermore, the lifting mechanism includes a first motor, a lead screw and a nut;

[0027] Specifically, the nut is fixedly mounted on the equipment platform, the lead screw is threadedly connected to the nut, and the lead screw passes through the support platform and is arranged parallel to the first guide rail;

[0028] Specifically, the first motor is fixedly mounted on the supporting platform, and an output end thereof is connected to an upper end of the lead screw via a transmission member.

[0029] Furthermore, a controller is provided, which is arranged on the supporting platform. The controller can control the start, stop and steering of the first motor and the second motor, receive monitoring data from the probe, and upload the data from the probe to the monitoring center.

[0030] Furthermore, the first motor is vertically fixed on the support platform, and its output end is connected to the upper end of the lead screw through a coupling;

[0031] Specifically, the lower ends of the at least two vertical first guide rails are fixedly connected via a connecting piece, and the lower end of the lead screw is rotatably mounted on the connecting piece.

[0032] Furthermore, a liquid level gauge is installed on the outer side of the first guide rail, and the liquid level gauge transmits a water level signal to the controller, and the controller adjusts the start and stop time of the first motor according to the water level signal.

[0033] Furthermore, the support platform is erected above the water surface.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. Taking samples through the sampling box and then performing static measurements improves the accuracy of monitoring.

[0036] 2. Automatic sampling and drainage of the sampling pool are achieved through the lifting mechanism and automatic gate, which improves the degree of automation of the device, enables the equipment to be used in unmanned monitoring stations in the field, and enables the equipment to be deployed at any location in the river.

[0037] 3. According to the type and setting of the probe, the relative position of the water sample and the probe can be adjusted through the lifting mechanism to improve the monitoring accuracy of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a structural diagram of an online monitoring device for water body oil pollution in the utility model;

[0039] Figure 2 It is a structural diagram of the sampling box in the utility model;

[0040] Figure 3 It is a structural diagram of the second guide rail in the utility model;

[0041] Figure 4 This is a schematic structural diagram of the first fork plate of the second guide rail in the present utility model;

[0042] Figure 5 This is a schematic diagram of the layout of the sealing strips between the second guide rail, the second fork plate, and the bottom plate of the sampling pool in the present invention;

[0043] Figure 6 This is a schematic diagram of the sealing surface structure of the middle door of the utility model;

[0044] Figure 7 This is a schematic diagram of the exterior structure of the middle door of the utility model;

[0045] Figure 8 This is a structural diagram of the utility model in which the middle door and the second guide rail are in a sliding state;

[0046] Figure 9 It is a structural schematic diagram of the utility model in which the middle door and the second guide rail are in a closed state.

[0047] In the figure: 1. Support platform; 2. Probe; 3. Sampling box; 4. First guide rail; 5. Overflow plate; 6. Water inlet channel; 7. Drain port; 8. Equipment platform; 9. First motor; 10. Lead screw; 11. Nut; 12. Second motor;

[0048] 13. Door stop; 13.1. Upper pressure projection; 13.2. Sealing start groove; 13.3. Guide cone groove;

[0049] 14. Second guide rail; 14.1. First fork wall; 14.2. Second fork wall; 14.3. Lower pressure projection; 14.4. Limiting projection;

[0050] 15. Rack; 16. Driving gear; 17. Connector; 18. Liquid level gauge;

[0051] 19. Sampling pool; 19.1. Sampling pool bottom plate;

[0052] 20. Sealing strip. DETAILED DESCRIPTION

[0053] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0054] Example 1:

[0055] See also Figures 1 to 2 The utility model provides an online monitoring device for oil pollution in water, comprising a supporting platform 1, a probe 2 and a sampling box 3. The supporting platform 1 is erected above the water surface, and at least two vertical first guide rails 4 are provided at the bottom thereof; a mounting hole is opened in the middle of the supporting platform 1, and the probe 2 is vertically detachably installed in the mounting hole; the sampling box 3 is slidably installed on the first guide rail 4; the sampling box 3 is connected to the supporting platform 1 through a lifting mechanism.

[0056] An overflow plate 5 is provided in the sampling box 3, and an equipment platform 8 is provided at the front end of the sampling box 3. The right side of the overflow plate 5 is a water inlet channel 6 that runs through the top and bottom, and the left side is a sampling pool 19; a drain outlet 7 is provided at the left end of the sampling pool 19, and an automatic gate is installed on the drain outlet 7.

[0057] The automatic gate includes a second motor 12 and a baffle 13. The front and rear ends of the drain outlet 7 are provided with second guide rails 14 adapted to the baffle 13. The baffle 13 is connected to the second guide rails 14 through a sliding limit sealing mechanism. The front end of the baffle 13 is provided with a rack 15. The second motor 12 is fixedly mounted on the equipment platform 8, and its output end is provided with a driving gear 16 meshing with the rack 15.

[0058] In order to drain the water in the sampling pool 19 , the bottom plate 19 . 1 of the sampling pool 19 is tilted toward the drain outlet 7 .

[0059] The lifting mechanism includes a first motor 9, a lead screw 10 and a nut 11;

[0060] The lead screw 10 is threadedly connected to the nut 11, and the nut 11 is fixedly mounted on the equipment platform 8. The lead screw 10 passes through the support platform 1 and is arranged parallel to the first guide rail 4; the first motor 9 is fixedly mounted on the support platform 1, and its output end is connected to the upper end of the lead screw 10 using a transmission member.

[0061] A controller is also provided, mounted on the support platform 1. The controller controls the start, stop, and direction of the first and second motors 9, 12, receives monitoring data from the probe 2, and uploads the data to the monitoring center. The controller activates the first motor 9, which then drives the sampling box 3 up and down along the first guide rail 4 via the drive of the lead screw 10 and nut 11.

[0062] When the device is in use, the support platform 1 is erected above the water surface, and the lower part of the first guide rail 4 is submerged in water; the sampling box 3 is then driven downward along the first guide rail 4 by the lifting mechanism until the overflow plate 5 is lower than the water surface; at this time, the water flows into the sampling pool 19 after passing through the water inlet channel 6 and overflowing the overflow plate 5; when the water in the sampling pool 19 is full, the controller drives the sampling box 3 upward through the lifting mechanism, and then the probe 2 performs online measurement of the water sample in the sampling pool 19; after the measurement is completed, the controller controls the second motor 12 to start, and the second motor 12 drives the baffle 13 upward through the transmission of the driving gear 16 and the rack 15, so that the water sample is discharged through the drain outlet 7; the above steps are repeated at intervals, thereby realizing long-term monitoring of the water body.

[0063] This device takes samples through the sampling box 3 and then performs static measurements, which is beneficial to improving the accuracy of monitoring; this device realizes sampling and drainage of the sampling pool 19 through a lifting mechanism and an automatic gate, improves the degree of automation of the device, and can be applied to unmanned monitoring stations in the field; this device can adjust the relative position of the water sample and the probe 2 through the lifting mechanism according to the type and setting of the probe 2, thereby improving the monitoring accuracy of the device.

[0064] It should be noted that the probe 2 itself belongs to the existing technology. For example, China CN102866136A discloses a probe-type online monitoring system and method for petroleum pollutants in water, CN109696536A discloses a water quality monitoring sampling probe, and CN103323400A discloses a multi-parameter integrated online water quality monitoring sensor system; all three clearly record the composition, detection mechanism and usage of the detection unit including the probe; that is to say, water quality detection probes are currently widely used, and those skilled in the art can select suitable probes or their combinations according to actual needs, and there is no technical obstacle to the implementation of the present invention.

[0065] It should be noted that the controller may be a programmable controller such as a PLC or a single chip microcomputer, which may transmit data via a wired connection and may transmit data wirelessly by adding a network module, which is clear to those skilled in the art.

[0066] Example 2:

[0067] On the basis of Example 1, the first motor 9 is vertically fixed on the supporting platform 1, and the output end thereof is connected to the upper end of the lead screw 10 through a coupling.

[0068] The lower ends of the at least two vertical first guide rails 4 are fixedly connected via a connecting member 17 , and the lower end of the lead screw 10 is rotatably mounted on the connecting member 17 .

[0069] Based on Example 1, this embodiment further provides a sliding limit sealing mechanism, such as Figure 3-9 As shown, the sliding limiting sealing mechanism includes an upper pressure protrusion 13.1, a lower pressure protrusion 14.3, a limiting protrusion 14.4, a sealing starting groove 13.2, and a sealing strip 20.

[0070] See also Figure 3-5The second guide rail 14 is in the shape of a U-shaped double fork wall, including a first fork wall 14.1 and a second fork wall 14.2. The first fork wall 14.1 is located at one end away from the sampling pool 19, and the second fork wall 14.2 is located at one end close to the sampling pool 19. A lower pressure protrusion 14.3 is provided at the lower end of the inner wall of the first fork wall 14.1, and at least two limiting protrusions 14.4 are provided on the inner wall of the second fork wall 14.2; the second fork wall 14.2 is embedded in the bottom plate 19.1 of the sampling pool 19, and the inner wall of the second fork wall 14.2 is flush with the left end surface of the bottom plate 19.1, and a sealing strip 20 is fixed to the inner wall of the second fork wall 14.2 and the left end surface of the bottom plate 19.1.

[0071] See also Figure 6-7 The end surface of the stop door 13 close to the second fork wall 14.2 is provided with a sealing start groove 13.2, and the number of the sealing start grooves 13.2 is the same as the limiting protrusions 14.4. The end surface of the stop door 13 close to the first fork wall 14.1 is provided with an upper pressure protrusion 13.1.

[0072] See also Figure 8-9 The upper pressure protrusion 13.1, the lower pressure protrusion 14.3, the limiting protrusion 14.4, and the sealing start groove 13.2 form a set of sliding limiting mechanisms. Two sets of sliding limiting mechanisms are provided, respectively located at the front end of the stop door 13 and the corresponding second guide rail 19, and the rear end of the stop door 13 and the corresponding second guide rail 19. In one set of sliding limiting mechanisms, the center planes of the upper pressure protrusion 13.1, the lower pressure protrusion 14.3, the limiting protrusion 14.4, and the sealing start groove 13.2 coincide with each other;

[0073] When the lower pressure protrusion 14.3 contacts the bottom of the baffle door, the upper pressure protrusion 13.1 contacts the upper end of the inner wall of the first fork wall 14.1, and the limiting protrusion 14.4 enters the sealing start groove 13.2. Under the action of the upper pressure protrusions 13.1 and the lower pressure protrusions 14.3 located at the four corners, the baffle door 13 is pressed onto the sealing strip 20 to achieve sealing.

[0074] Specifically, the limiting protrusion 14.4 corresponds to the sealing start groove 13.2 one-to-one. The thickness of the limiting protrusion 14.4 is greater than the thickness of the sealing strip 20. The distance between the limiting protrusion 14.4 and the first fork wall 14.1 is greater than the thickness of the baffle door 13. The depth of the sealing start groove 13.2 is greater than the thickness of the limiting protrusion 14.4. The limiting protrusion 14.4 can prevent the baffle door 13 from contacting the sealing strip 20 in advance and affecting sliding. The sealing start groove 13.2 can accommodate the limiting protrusion 14.4, so that the baffle door 13 can move and press the sealing strip 20.

[0075] Preferably, the stopper protrusion 14.4 is a semicircular protrusion, and the length of the seal activation groove 13.2 is greater than the radius of the stopper protrusion 14.4, so that the seal activation groove 13.2 and the stopper protrusion 14.4 can be smoothly separated. Specifically, the distance between the lower pressure protrusion 14.3 and the second fork wall 14.2 is greater than the thickness of the baffle door 13.3, and the distance between the lower pressure protrusion 14.3 and the second fork wall 14.2 is less than the sum of the thickness of the baffle door 13.3 and the thickness of the sealing strip 20, so that the baffle door 13 can press the sealing strip 20.

[0076] Specifically, the stop door 13 is provided with a guide conical groove 13.3 corresponding to the lower pressure protrusion 14.3, the upper end surface of the lower pressure protrusion 14.3 is a conical surface, and the lower end surface of the upper pressure protrusion 13.1 is a conical surface, which can more smoothly squeeze the stop door 13 towards the sealing strip 20.

[0077] Specifically, the second guide rail 19 is connected to the sampling box 3 by welding.

[0078] Specifically, the thickness of the driving gear 16 is greater than the distance between the first fork wall 14.1 and the second fork wall 14.2, so that the rack 15 is still fully engaged with the driving gear 16 after the baffle door 13 moves. The second motor 12 uses a servo motor, which can sense the torque change. The second motor 12 drives the driving gear 16 to move the baffle door 13 downward. When it moves to the bottom, the upper pressure protrusion 13.1 and the lower pressure protrusion 14.3 squeeze the baffle door 13 onto the sealing strip 20. At this time, the friction force increases sharply. After sensing the torque change, the second motor 12 stops after a delay, so that the baffle door 13 presses the sealing strip 20; when the second motor 12 drives the driving gear 16 to move upward, after the torque drops sharply, it moves up a set distance to prevent the baffle door 13 from falling out.

[0079] Specifically, the first motor 9 is also a servo motor, which can accurately control the number of rotations and thus accurately control the position of the sampling box 3.

[0080] It should be noted that the servo motor itself is a prior art and has a torque sensing function, which is clear to those skilled in the art.

[0081] Example 3:

[0082] Based on Example 1 or Example 2, the first guide rail 4 is made of angle iron, and four first guide rails 4 are provided. The four side corners of the sampling box 3 are provided with rollers that roll with the angle iron. The setting of the rollers reduces the friction between the sampling box 3 and the first guide rail 4, which helps to improve the stability of the lifting and lowering of the sampling box 3.

[0083] A liquid level gauge 18 is installed on the outer side of the first guide rail 4. The liquid level gauge 18 can transmit the water level signal to the controller, and the controller then dynamically adjusts the downward movement distance of the sampling box 3 according to the water level, which helps to successfully complete the sampling operation.

[0084] All components not discussed in detail in this application and the connection methods of the components in this application are well-known technologies in the technical field and can be directly applied without further explanation.

[0085] In this utility model, the term "plurality" refers to two or more, unless otherwise specified. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean fixed, removable, or integral; "connected" can mean directly or indirectly through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0086] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0087] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0088] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An online monitoring device for water body oil pollution, comprising a support platform, characterized in that: Also includes probe and sampling box; A mounting hole is provided in the middle of the support platform, and the probe is vertically mounted in the mounting hole; At least two vertical first guide rails are provided at the bottom of the support platform; the sampling box is slidably mounted on the first guide rails; and the sampling box is connected to the support platform via a lifting mechanism.

2. The online monitoring device for water body oil pollution according to claim 1 is characterized in that: An overflow plate is provided in the sampling box, and an equipment platform is provided at the front end of the sampling box; The right side of the overflow plate is a water inlet channel that runs through from top to bottom, and the left side is a sampling pool; A drain outlet is provided at the left end of the sampling pool, and an automatic gate is installed on the drain outlet.

3. The online monitoring device for water body oil pollution according to claim 2 is characterized in that: The automatic gate includes a second motor and a blocking door; The front and rear ends of the drain outlet are provided with second guide rails adapted to the baffle door, the baffle door is connected to the second guide rails via a sliding limit sealing mechanism, and the front end of the baffle door is provided with a rack; The second motor is fixedly mounted on the equipment platform, and an output end of the second motor is provided with a driving gear meshing with a rack.

4. The online monitoring device for water body oil pollution according to claim 3 is characterized in that: The sliding limiting sealing mechanism includes a sliding limiting mechanism and a sealing strip; The sliding limit mechanism includes an upper pressure protrusion, a lower pressure protrusion, a limit protrusion, and a sealing start groove. The sliding limit mechanism is provided with two groups, one at the front end of the stop door and the corresponding second guide rail, the other at the rear end of the stop door and the corresponding second guide rail. The second guide rail is in a U-shaped double-forked wall shape, including a first forked wall and a second forked wall, wherein the first forked wall is located at an end away from the sampling pool, and the second forked wall is located at an end close to the sampling pool, a lower pressure protrusion is provided at the lower end of the inner wall of the first forked wall, and at least two limiting protrusions are provided on the inner wall of the second forked wall; The second fork wall is embedded in the bottom plate of the sampling pool, the inner wall of the second fork wall is flush with the left end surface of the bottom plate, and a sealing strip is fixedly provided between the inner wall of the second fork wall and the left end surface of the bottom plate; The end surface of the blocking door close to the second fork wall is provided with a sealing start groove, the number of the sealing start grooves is the same as that of the limiting protrusions and they correspond one to one. The end surface of the blocking door close to the first fork wall is provided with an upper pressure protrusion; When the lower pressure protrusion contacts the bottom of the baffle door, the upper pressure protrusion contacts the upper end of the inner wall of the first fork wall, and the limiting protrusion enters the sealing start groove. Under the action of the upper and lower pressure protrusions, the baffle door is pressed onto the sealing strip to achieve sealing.

5. The online monitoring device for water body oil pollution according to claim 2 is characterized in that: The bottom plate of the sampling pool is inclined toward the drain outlet.

6. The online monitoring device for water body oil pollution according to claim 3 is characterized in that: The lifting mechanism includes a first motor, a lead screw and a nut; The nut is fixedly mounted on the equipment platform, the lead screw is threadedly connected to the nut, and the lead screw passes through the support platform and is arranged parallel to the first guide rail; The first motor is fixedly mounted on the supporting platform, and the output end of the first motor is connected to the upper end of the lead screw via a transmission member.

7. The online monitoring device for water body oil pollution according to claim 6 is characterized in that: A controller is also provided, which is arranged on the supporting platform. The controller can control the start, stop and steering of the first motor and the second motor, receive monitoring data from the probe, and upload the data from the probe to the monitoring center.

8. The online monitoring device for water body oil pollution according to claim 6 is characterized in that: The first motor is vertically fixed on the support platform, and its output end is connected to the upper end of the lead screw through a coupling; The lower ends of the at least two vertical first guide rails are fixedly connected through a connecting piece, and the lower end of the lead screw is rotatably mounted on the connecting piece.

9. The online monitoring device for water body oil pollution according to claim 7, characterized in that: A liquid level gauge is installed on the outer side of the first guide rail, and the liquid level gauge transmits a water level signal to the controller, and the controller adjusts the start and stop time of the first motor according to the water level signal.

10. The online monitoring device for water body petroleum pollution according to any one of claims 1 to 9, characterized in that: The supporting platform is erected above the water surface.

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