Unmanned patrol ship for water quality detection and sampling

Abstract

The invention discloses an unmanned patrol ship for water quality detection and sampling, and relates to the technical field of water quality sampling, the unmanned patrol ship comprises an unmanned ship, and also comprises a controller, the controller is installed on the unmanned ship, and the controller is electrically connected with the unmanned ship; the bottom of the portal frame is fixedly mounted on a deck of the unmanned ship; the bottom of the fixing frame is fixedly installed on a deck of the unmanned ship, and a lowering hole located in the fixing frame is formed in the deck of the unmanned ship; the plurality of sampling mechanisms are used for sampling water quality and are arranged in the fixed frame along the vertical direction; the lowering mechanism is arranged in the portal frame, and the sampling mechanisms synchronously move downwards through the lowering mechanism. Synchronous depth sampling can be carried out at the same water source position, and the pollution range of water quality and the approximate position of a pollution source can be judged through subsequent laboratory operation.

Description

Technical Field

[0001] The invention relates to the technical field of water quality sampling, and in particular to an unmanned patrol boat for water quality detection and sampling. Background Art

[0002] In the field of water quality sampling and testing, it is often necessary to sample water at a fixed depth. The currently commonly used sampling method is to sink a sampling bucket into the sampling water area, fill the sampling bucket with water, and then use the sampling bucket's own weight to sink to the required depth.

[0003] After searching, the Chinese patent document with authorization announcement number CN110745207B discloses a water quality detection sampling device and a sampling method thereof, wherein the water quality detection sampling device comprises: a main compartment and a sub-compartment, wherein the main compartment comprises two sets of side wings fixedly mounted on both sides of the main compartment, two sets of fastening mechanisms respectively mounted on the two sets of side wings, two sets of steering paddles and rudders respectively mounted under the two sets of side wings, a filter shell mounted at the tail of the main compartment, a driving paddle and rudder mounted in the filter shell, and a main compartment sampling mechanism mounted at the end of the main compartment; the sub-compartment comprises a first sub-compartment and a second sub-compartment respectively plugged into the two sets of fastening mechanisms; the patent installs two sets of identical sub-compartments on the side wings of the main compartment, and then when three-point sampling is required in the same lake, the sub-compartment is brought into the lake through the main compartment, and then the sub-compartment is separated, and the three-point sampling is performed simultaneously by the sub-compartment and the main compartment.

[0004] The essence of the above patent is to conduct water quality testing and sampling based on unmanned patrol boats. It is capable of multi-point sampling, but it is impossible to conduct water quality testing and sampling at different depths at one sampling point (the shallow water quality in some lakes is good, but the deep water quality is poor). Therefore, in order to better obtain water quality results, it is necessary to conduct multiple sampling at the same point, and the sampling depth is different each time, which is too cumbersome. Summary of the invention

[0005] The purpose of the present invention is to provide an unmanned patrol boat for water quality detection and sampling to solve the problems raised in the above-mentioned background technology.

[0006] The technical solution of the present invention is: an unmanned patrol boat for water quality detection and sampling, comprising an unmanned boat, and also comprising: A controller, wherein the controller is installed on the unmanned ship and the controller is electrically connected to the unmanned ship; A gantry, the bottom of which is fixedly mounted on the deck of the unmanned ship; A fixing frame, the bottom of which is fixedly mounted on the deck of the unmanned ship, and the deck of the unmanned ship is provided with a lowering hole located in the fixing frame; A plurality of sampling mechanisms for sampling water quality, wherein the plurality of sampling mechanisms are arranged in a vertical direction in a fixed frame; A lowering mechanism, wherein the lowering mechanism is arranged in the gantry, and each sampling mechanism is synchronously moved downward by the lowering mechanism; A plurality of groups of limiting mechanisms are connected one-to-one with a plurality of sampling mechanisms, and the limiting mechanisms are used to limit the downward movement distance of the sampling mechanisms.

[0007] Preferably, a sampling camera is fixedly installed on the front end of the deck of the unmanned ship, and the sampling camera is electrically connected to the controller.

[0008] Preferably, the sampling mechanism includes a sampling cylinder, a water absorption hole is opened at the outer bottom position of the sampling cylinder, an intermediate cylinder which is integrally structured and coaxially arranged therewith is arranged inside the sampling cylinder, a sliding cylinder is provided on the outer sliding sleeve of the intermediate cylinder, a circular ring plate which is coaxially arranged therewith is fixed to the outer side of the sliding cylinder, a first leather cup is fixed to the outer side of the circular ring plate, and a second leather cup is fixed to the inner side of the sliding cylinder.

[0009] Preferably, a plurality of reference plates are fixed to the inner wall of the sampling tube, a guide column is slidably inserted on the top of each reference plate, the bottom end of the guide column is fixed on a circular ring plate, a limit plate is fixed on the top end of the guide column, a return spring is sleeved on the outer side of the guide column, and both ends of the return spring are in contact with the limit plate and the reference plate respectively.

[0010] Preferably, an inner frame is fixed to the top of the inner side of the sampling tube, and a plurality of through-holes with the center of the sampling tube as the central axis and equidistantly distributed in a ring shape are provided on the top of the inner frame. A rotating shaft is rotatably mounted on both sides of each through-hole, and a retaining plate is fixed on the outer side of each rotating shaft. A plurality of hole grooves are provided on the outer side of the inner frame, and the plurality of hole grooves are coaxially arranged one-to-one with the plurality of rotating shafts respectively. A coil spring is fixed to the hole grooves and the rotating shaft coaxially arranged therewith, and a limiting ring groove coaxially arranged therewith is provided on the outer side of the slide tube.

[0011] Preferably, the lowering mechanism includes a rope collecter, a connecting rope and a limiting circular plate. The outer shell of the rope collecter is fixedly installed at the top of the gantry. A screw head is fixed to the rope end of the rope collecter. A nut is fixed to one end of the connecting rope. The screw head is installed in the nut through a thread. The connecting rope passes through each intermediate tube, and the other end of the connecting rope is fixed to the limiting circular plate.

[0012] Preferably, a rotating hole is provided at one end of the positioning plate, and a cylinder is rotatably installed in the hole of the rotating hole, the limiting mechanism comprises a spring, a rotating column, a first recessed block, a T-block and a pair of fixed plates, one side of the fixed plate is fixed in the fixed frame, a circular hole is provided on the outer side of the fixed plate, two ends of the rotating column are respectively rotatably installed in two circular holes, one end of the spring is fixed on the rotating column, and the other end of the spring is fixed on the first recessed block, and the two ends of the cylinder are respectively rotated on the two ends in the recess of the first recessed block, a T-slot is provided on the outer side of the first recessed block, a groove is provided at the T head of the T-slot, and the T head of the T-block is arranged in the groove.

[0013] Preferably, a plurality of support plates are fixed to the top end of the sampling cylinder.

[0014] Preferably, one end of the support plate protrudes to one side, and a fixing ring is fixed to the outer side of the sampling tube.

[0015] Preferably, a plurality of second recessed blocks are fixed on the outer side of the fixing ring, a connecting rod is rotatably mounted on the recess of the second recessed block, a buckle plate is rotatably mounted on one end of the connecting rod, the bottom end of the buckle plate is bent toward the sampling tube, and the top end of the buckle plate is fixed on the cylinder.

[0016] The present invention provides an unmanned patrol boat for water quality detection and sampling by improvement, which has the following improvements and advantages compared with the prior art: Firstly, the present invention can perform synchronous depth sampling at the same water source location, and through subsequent laboratory operations, it can determine the pollution range of water quality and the approximate location of the pollution source; Second, when the sampling mechanism is lowered, the sampling mechanism is automatically limited by the limiting mechanism, that is, the lowering depth is automatically controlled. At the same time, the limiting mechanism is a purely mechanical structure as a whole, which is convenient for replacement and maintenance, and has a simple structure and is easy to manufacture; Thirdly, each sampling mechanism of the present invention is operated by a plurality of limiting mechanisms, which apply uniform pulling force to the periphery of the sampling mechanism, so that the sampling mechanism is more stable in the water, thereby making the sampling process more stable and improving the sampling accuracy; Fourthly, in the present invention, multiple sampling mechanisms are an integral structure during the lowering process. Due to the high flow velocity of water in the shallow water layer, the sampling mechanisms will be pushed off track. However, the various sampling mechanisms are combined into a whole, which increases their own weight and makes it difficult for the water flow to push them, thereby improving the accuracy of water quality sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the top area structure of the present invention; Figure 3 for Figure 2 A schematic diagram of the enlarged structure at point A; Figure 4 for Figure 2 A schematic diagram of the enlarged structure at B; Figure 5 It is a schematic diagram of the structure of the first concave block and the T-block of the present invention; Figure 6 It is a schematic diagram of the internal structure of the first concave block and the T-block of the present invention; Figure 7 It is a schematic diagram of the structure of the sampling mechanism of the present invention; Figure 8 It is a schematic diagram of the internal structure of the sampling mechanism of the present invention; Fig. 9 for Figure 8 A schematic diagram of the enlarged structure at C; Fig.10 It is a cross-sectional view of the sampling mechanism of the present invention; Fig.11 This is a diagram of the sampling mechanism of the present invention in a released state.

[0019] Reference numerals: 1. Unmanned boat; 2. Controller; 3. Gantry; 4. Fixed frame; 5. Rope collecting machine; 6. Sampling mechanism; 7. Sampling camera; 8. Screw head; 9. Nut; 10. Connecting rope; 11. Fixed plate; 12. Rotating column; 13. Spring; 14. First concave block; 15. T-block; 16. T-slot; 17. Groove; 18. Sampling tube; 19. Water absorption hole; 20. Buckle plate; 21. Connecting rod; 2 2. Second concave block; 23. Fixed ring; 24. Positioning plate; 25. Inner frame; 26. Through port; 27. Circular ring plate; 28. Sliding cylinder; 29. ​​First leather cup; 30. Limiting ring groove; 31. Rotating shaft; 32. Coil spring; 33. Hole groove; 34. Reference plate; 35. Reset spring; 36. Limiting plate; 37. Guide column; 38. Second leather cup; 39. Intermediate cylinder; 40. Limiting circular plate; 41. Support plate. DETAILED DESCRIPTION

[0020] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0021] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0022] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, 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, and therefore cannot be understood as a limitation on this patent.

[0023] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0024] The present invention provides an unmanned patrol boat for water quality detection and sampling through improvement. The technical solution of the present invention is: like Figures 1 to 11 As shown, an embodiment of the present invention provides an unmanned patrol boat for water quality detection and sampling, including an unmanned boat 1, which is a ship-type drone, which is a prior art, and its specific communication and working principle are not described in detail, and also includes: Controller 2, controller 2 is prior art, its specific communication and working principle are not elaborated in detail, and controller 2 is supplemented. An information transmission module is installed inside controller 2, controller 2 is installed on unmanned boat 1, and controller 2 is electrically connected with unmanned boat 1. The monitoring center sends a signal to controller 2, and controller 2 controls unmanned boat 1 to move cyclically along a certain trajectory; The gantry 3 is made of metal, and the bottom of the gantry 3 is fixedly installed on the deck of the unmanned ship 1; A fixing frame 4, the fixing frame 4 is made of metal, the bottom of the fixing frame 4 is fixedly mounted on the deck of the unmanned ship 1, and the deck of the unmanned ship 1 is provided with a lowering hole located in the fixing frame 4; A plurality of sampling mechanisms 6 for sampling water quality are arranged in the fixing frame 4 along the vertical direction, and the arrangement is as follows: Figure 1 As shown; A lowering mechanism, which is arranged in the gantry 3, and each sampling mechanism 6 is synchronously moved downward by the lowering mechanism, and each sampling mechanism 6 passes through a lowering hole; Multiple groups of limiting mechanisms are connected one-to-one with multiple sampling mechanisms 6, and the limiting mechanisms are used to limit the downward movement distance of the sampling mechanisms 6.

[0025] Specifically, a sampling camera 7 is fixedly installed on the front end of the deck of the unmanned boat 1. The sampling camera 7 is electrically connected to the controller 2. The sampling camera 7 is a prior art, and its specific communication and working principle will not be elaborated in detail.

[0026] Specifically, in combination with Figure 7-Figure 11 The sampling mechanism 6 includes a sampling tube 18, a water absorption hole 19 is opened at the bottom position of the outer side of the sampling tube 18, an intermediate tube 39 which is integrally structured and coaxially arranged therewith is arranged inside the sampling tube 18, a sliding tube 28 is provided on the outer side of the intermediate tube 39 for sliding sleeve, the sliding tube 28 contacts the outer side wall of the intermediate tube 39 through the second leather cup 38, the second leather cup is used for sealing between the sliding tube 28 and the intermediate tube 39, a circular ring plate 27 which is coaxially arranged therewith is fixed on the outer side of the sliding tube 28, a first leather cup 29 is fixed on the outer side of the circular ring plate 27, the circular ring plate 27 contacts the inner side wall of the sampling tube 18 through the first leather cup 29, the first leather cup 29 is used to improve the sealing between the circular ring plate 27 and the sampling tube 18, a second leather cup 38 is fixed on the inner side of the sliding tube 28, during the upward movement of the circular ring plate 27, the circular ring plate 27 generates negative pressure in the sampling tube 18, and water enters the sampling tube 18 through the water absorption hole 19 (refer to the syringe).

[0027] Specifically, in combination with Fig.10 A plurality of reference plates 34 are fixed to the inner wall of the sampling tube 18, and a guide column 37 is slidably inserted on the top of each reference plate 34, and the bottom end of the guide column 37 is fixed on the circular ring plate 27. It can be seen that the setting of the guide column 37 enables the circular ring plate 27 to only move linearly in the sampling tube 18, and a limit plate 36 is fixed to the top of the guide column 37. A return spring 35 is sleeved on the outer side of the guide column 37, and the two ends of the return spring 35 are in contact with the limit plate 36 and the reference plate 34 respectively. In the absence of external force, the return spring 35 pushes the guide column 37 upward through the limit plate 36, and the guide column 37 pulls the circular ring plate 27 upward.

[0028] Specifically, in combination with Figure 7 - Fig.11An inner frame 25 is fixed to the inner top of the sampling tube 18. A plurality of openings 26 are provided on the top of the inner frame 25, which are equidistantly distributed in an annular pattern and take the center of the sampling tube 18 as the central axis. A rotating shaft 31 is installed on both sides of each opening 26 for common rotation. A positioning plate 24 is fixed to the outer side of each rotating shaft 31. A plurality of slots 33 are provided on the outer side of the inner frame 25. The plurality of slots 33 are coaxially arranged with the plurality of rotating shafts 31 one by one. The slots 33 are coaxially arranged with the rotating shafts 31. A coil spring 32 is fixed together with 31, and a limiting ring groove 30 is coaxially arranged on the outer side of the slide cylinder 28, a downward thrust is applied to the top of the slide cylinder 28, the annular plate 27 on the slide cylinder 28 pushes the internal gas of the sampling tube 18 out, the reset spring 35 is compressed, and the locking plate 24 is under the action of the coil spring 32, one end of the locking plate 24 is always in contact with the slide cylinder 28, when the locking plate 24 is locked in the limiting ring groove 30, the thrust is removed, and the slide cylinder 28 is restricted from moving by the locking plate 24.

[0029] Specifically, in combination with Figure 2 The lowering mechanism includes a rope take-up machine 5, a connecting rope 10 and a limiting circular plate 40. The shell of the rope take-up machine 5 is fixedly installed on the top of the gantry 3. A screw head 8 is fixed to the rope end of the rope take-up machine 5. A nut 9 is fixed to one end of the connecting rope 10. The screw head 8 is installed in the nut 9 through a thread. The connecting rope 10 passes through each intermediate tube 39. The other end of the connecting rope 10 is fixed to the limiting circular plate 40. The rope take-up machine 5 releases the rope. Each sampling tube 18 is in contact with the limiting circular plate 40 at all times due to gravity. When the rope is lengthened, each sampling tube 18 moves down into the water.

[0030] Specifically, in combination with Figure 5 and Figure 6 A rotating hole is provided at one end of the positioning plate 24, a cylindrical body is rotatably installed in the hole of the rotating hole, the limiting mechanism includes a spring 13, a rotating column 12, a first concave block 14, a T-block 15 and a pair of fixed plates 11, one side of the fixed plate 11 is fixed in the fixed frame 4, a circular hole is provided on the outer side of the fixed plate 11, and both ends of the rotating column 12 are rotatably installed in the two circular holes respectively, one end of the spring 13 is fixed on the rotating column 12, and the other end of the spring 13 is fixed on the first concave block 14. On a concave block 14, the two ends of the cylinder are respectively rotated on the two ends of the concave of the first concave block 14, and a T-slot 16 is opened on the outer side of the first concave block 14. A groove 17 is opened at the T head of the T-slot 16. The T head of the T-block 15 is set in the groove 17. After the sampling is completed, each sampling tube 18 is reset, the T-block 15 is first moved out of the groove 17, and then the T-block 15 is moved out of the T-slot 16, and then the screw head 8 and the nut 9 are separated to take out each sampling tube 18.

[0031] Specifically, a plurality of support plates 41 are fixed to the top of the sampling cylinder 18 . When the sampling cylinder 18 is reset, two adjacent sampling cylinders 18 are separated from each other by the support plates 41 to prevent the slide cylinder 28 in the sampling cylinder 18 from being squeezed and damaged.

[0032] Specifically, one end of the support plate 41 protrudes to one side, and a fixing ring 23 is fixed to the outer side of the sampling tube 18 .

[0033] Specifically, a plurality of second concave blocks 22 are fixed on the outer side of the fixing ring 23, a connecting rod 21 is rotatably mounted on the notch of the second concave block 22, a buckle plate 20 is rotatably mounted on one end of the connecting rod 21, the bottom end of the buckle plate 20 is bent toward the sampling tube 18, and the top end of the buckle plate 20 is fixed on the cylinder, and the connecting rod 21 is rotatably mounted on the one end of the connecting rod 21. Figure 1 The buckle plate 20 is buckled on the support plate 41. When the locking plate 24 is pulled upward, one end of the locking plate 24 moves out of the limiting ring groove 30. The locking plate 24 pulls one end of the buckle plate 20, and the bottom end of the buckle plate 20 is separated from the support plate 41, so that the sampling tube 18 below is lowered.

[0034] Working principle: Combined with Figure 1 , is the initial state of the entire device. The monitoring center sends a signal to the controller 2. The controller 2 controls the unmanned boat 1 to move in a certain trajectory in a cycle. The camera collects the water surface. When the water surface is collected and there is a gap between the picture in the cloud, the rope retractor 5 releases the rope. Each sampling tube 18 is in contact with the limiting circular plate 40 at all times due to gravity. When the rope is lengthened, each sampling tube 18 moves down into the water. Since the multiple sampling mechanisms 6 are an integral structure during the lowering process, the sampling mechanism 6 will be pushed off due to the high flow velocity of the shallow water layer. However, each sampling mechanism 6 is combined into a whole, which makes itself heavier and difficult to be pushed by the water flow, thereby improving the accuracy of water quality sampling; during the lowering process, the spring 13 of each group of limiting mechanisms is unwound (here is a supplementary explanation. From top to bottom, the number of windings of the spring 13 gradually increases). When the most When the spring 13 at the top is fully released, the T-block 15 and the first concave block 14 at one end of the spring 13 pull the locking plate 24. When the locking plate 24 is pulled upward, one end of the locking plate 24 moves out of the limiting ring groove 30, and the reset spring 35 resets. During the upward movement of the annular plate 27, the annular plate 27 generates negative pressure in the sampling tube 18, and water enters the sampling tube 18 through the water absorption hole 19. From top to bottom, the spring 13 is gradually fully released, that is, from top to bottom, each sampling tube 18 absorbs water at different depths. It can be seen that the entire sampling mechanism 6 can automatically control the lowering depth and automatically sample; after sampling is completed, each sampling tube 18 is reset, the T-block 15 is first moved out of the groove 17, and then the T-block 15 is moved out of the T-slot 16, and then the screw head 8 and the nut 9 are separated, and each sampling tube 18 can be taken out.

[0035] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An unmanned patrol boat for water quality detection and sampling, comprising an unmanned boat (1), characterized in that: Also includes: A controller (2), wherein the controller (2) is mounted on the unmanned ship (1), and the controller (2) is electrically connected to the unmanned ship (1); A gantry (3), the bottom of the gantry (3) being fixedly mounted on the deck of the unmanned ship (1); A fixing frame (4), the bottom of the fixing frame (4) being fixedly mounted on the deck of the unmanned ship (1), the deck of the unmanned ship (1) being provided with a lowering hole located inside the fixing frame (4); A plurality of sampling mechanisms (6) for sampling water quality, wherein the plurality of sampling mechanisms (6) are arranged in a vertical direction in the fixing frame (4); A lowering mechanism, the lowering mechanism being arranged in the gantry (3), and each sampling mechanism (6) being synchronously moved downward by the lowering mechanism; A plurality of groups of limiting mechanisms, wherein the plurality of groups of limiting mechanisms are connected one-to-one with a plurality of sampling mechanisms (6), and the limiting mechanisms are used to limit the downward movement distance of the sampling mechanisms (6); The sampling mechanism (6) comprises a sampling tube (18), a water absorption hole (19) is provided at the bottom of the outer side of the sampling tube (18), an intermediate tube (39) which is integrally structured and coaxially arranged with the sampling tube (18) is arranged inside the sampling tube (18), a sliding tube (28) is provided on the outer side of the intermediate tube (39), a circular plate (27) which is coaxially arranged with the sliding tube (28) is fixed on the outer side of the sliding tube (28), a first leather cup (29) is fixed on the outer side of the circular plate (27), and a second leather cup (38) is fixed on the inner side of the sliding tube (28); A plurality of reference plates (34) are fixed to the inner side wall of the sampling tube (18), a guide column (37) is slidably inserted at the top of each reference plate (34), the bottom end of the guide column (37) is fixed to the annular plate (27), a limit plate (36) is fixed to the top of the guide column (37), a return spring (35) is sleeved on the outer side of the guide column (37), and the two ends of the return spring (35) are in contact with the limit plate (36) and the reference plate (34) respectively; An inner frame (25) is fixed to the top of the inner side of the sampling tube (18), and a plurality of openings (26) are provided on the top of the inner frame (25) and are distributed in an equidistant annular pattern with the center of the sampling tube (18) as the central axis. A rotating shaft (31) is rotatably mounted on both sides of each opening (26), and a retaining plate (24) is fixed to the outer side of each rotating shaft (31). A plurality of hole grooves (33) are provided on the outer side of the inner frame (25), and the plurality of hole grooves (33) are coaxially arranged with the plurality of rotating shafts (31) in a one-to-one relationship. A coil spring (32) is fixed to the hole grooves (33) and the rotating shaft (31) coaxially arranged therewith, and a limiting ring groove (30) coaxially arranged therewith is provided on the outer side of the slide tube (28); The lowering mechanism comprises a rope collecting machine (5), a connecting rope (10) and a limiting circular plate (40); the outer shell of the rope collecting machine (5) is fixedly mounted on the top of the gantry (3); a screw head (8) is fixed to the rope end of the rope collecting machine (5); a nut (9) is fixed to one end of the connecting rope (10); the screw head (8) is installed in the nut (9) by means of a thread; the connecting rope (10) passes through each intermediate tube (39); and the other end of the connecting rope (10) is fixed to the limiting circular plate (40); A rotating hole is provided at one end of the positioning plate (24), a cylindrical body is rotatably mounted in the hole of the rotating hole, the limiting mechanism comprises a spring (13), a rotating column (12), a first concave block (14), a T-block (15) and a pair of fixed plates (11), one side of the fixed plate (11) is fixed in the fixed frame (4), a circular hole is provided on the outer side of the fixed plate (11), two ends of the rotating column (12) are rotatably mounted in the two circular holes respectively, one end of the spring (13) is fixed on the rotating column (12), the other end of the spring (13) is fixed on the first concave block (14), the two ends of the cylindrical body are rotatably mounted on the two ends of the notch of the first concave block (14), a T-groove (16) is provided on the outer side of the first concave block (14), a concave groove (17) is provided at the T-head of the T-groove (16), and the T-head of the T-block (15) is arranged in the concave groove (17).

2. The unmanned patrol boat for water quality detection and sampling according to claim 1 is characterized in that: A sampling camera (7) is fixedly mounted on the front end of the deck of the unmanned ship (1), and the sampling camera (7) is electrically connected to the controller (2).

3. The unmanned patrol boat for water quality detection and sampling according to claim 1 is characterized in that: A plurality of support plates (41) are fixed to the top end of the sampling cylinder (18).

4. The unmanned patrol boat for water quality detection and sampling according to claim 3 is characterized in that: One end of the support plate (41) protrudes toward one side, and a fixing ring (23) is fixed to the outside of the sampling tube (18).

5. The unmanned patrol boat for water quality detection and sampling according to claim 4 is characterized in that: A plurality of second recessed blocks (22) are fixed to the outer side of the fixing ring (23); a connecting rod (21) is rotatably mounted on the recess of the second recessed block (22); a buckle plate (20) is rotatably mounted on one end of the connecting rod (21); the bottom end of the buckle plate (20) is bent toward the sampling tube (18); and the top end of the buckle plate (20) is fixed on the cylinder.

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