Water resource analysis with different depth sampling equipment

Abstract

The application relates to a different-depth sampling equipment for water resource analysis, which comprises a receiving and releasing rod, a rotating drive assembly fixedly connected to the lower end of the receiving and releasing rod, and a linear installation assembly fixedly connected to the driving end of the rotating drive assembly, three installation seats arranged in a straight line are installed on the linear installation assembly, the arrangement straight line of each installation seat is located in the rotating plane of the linear installation assembly, and a sampling bottle is rotationally connected to the upper end of each installation seat, each sampling bottle is in an upper-opening structure, the sampling equipment further comprises a positioning assembly fixedly connected to the rotating drive assembly and fixedly connected to each sampling bottle, and the positioning assembly is used for keeping each sampling bottle arranged in a vertical mode. The application can improve the technical problem of low sampling efficiency in the prior art.

Description

Technical Field

[0001] This invention relates to the field of water sample treatment equipment technology, specifically to a sampling device for water resource analysis at different depths. Background Technology

[0002] River and lake water quality monitoring is an important part of surface water environmental protection. Monitoring data is an important basis for reflecting the degree of water pollution, and the accuracy of monitoring data has a significant impact on the environmental protection measures taken.

[0003] Typically, the current sampling process involves: sampling personnel arriving at the sampling point by boat, lowering the sampling bottle to the required water depth using a rope, filling the bottle with water, then pulling it out and draining the water into a sampling bag for storage. This process is repeated, with the sampling bottle reaching different depths by controlling the length of the rope, allowing for multiple sampling operations.

[0004] When sampling using the existing sampling methods described above, the sampling bottles are lowered manually, and only fixed-point sampling can be performed each time, resulting in low collection efficiency. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a sampling device for water resources analysis at different depths, so as to improve the technical problem of low efficiency of fixed-point sampling in the prior art.

[0006] This invention is achieved through the following technical solution:

[0007] A water resource analysis sampling device for different depths includes a retractable rod, a rotation drive assembly fixedly connected to the lower end of the retractable rod, and a linear mounting assembly fixedly connected to the drive end of the rotation drive assembly. The linear mounting assembly has three mounting seats arranged in a straight line, with the alignment of the mounting seats within the rotation plane of the linear mounting assembly. Each mounting seat has a sampling bottle rotatably connected to its upper end, and each sampling bottle has an open top. The sampling device also includes a positioning assembly fixedly connected to the rotation drive assembly and simultaneously fixedly connected to each sampling bottle. The positioning assembly is used to keep each sampling bottle vertically positioned.

[0008] Furthermore, the linear mounting assembly includes a second waterproof housing, a bidirectional threaded rod rotatably connected to the second waterproof housing at both ends, and a second driving component whose driving end is driven and connected to the middle end of the bidirectional threaded rod. The bidirectional threaded rod and the second driving component are both installed inside the second waterproof housing, and the threads at both ends of the bidirectional threaded rod have opposite directions. The driving end of the rotary drive assembly is fixedly connected to the second waterproof housing. The mounting seat located in the middle is fixedly connected to the second waterproof housing, and the two mounting seats located on both sides are slidably connected to the second waterproof housing and threadedly connected to both ends of the bidirectional threaded rod.

[0009] Furthermore, the upper side of the second waterproof box has two through slots, and the middle ends of the two mounting seats on both sides are respectively adapted to and slidably connected to the two slots; the linear mounting assembly also includes two inner corrugated waterproof strips respectively adapted to and installed in the two slots, the two ends of the two inner corrugated waterproof strips in the length direction are fixedly connected to the groove wall of the corresponding slot, and the middle end is sealed to the corresponding mounting seat, and the two ends of the two inner corrugated waterproof strips in the width direction are slidably connected to the groove wall of the corresponding slot.

[0010] Furthermore, the linear mounting assembly also includes two outer corrugated protective covers, which are respectively fitted onto both ends of the second waterproof box, and both ends of each outer corrugated protective cover are sealed to the second waterproof box. The two slots are respectively located inside the two outer corrugated protective covers, and the middle ends of the two mounting bases are respectively sealed to the two outer corrugated protective covers.

[0011] Furthermore, the linear mounting assembly also includes a waterproof cover installed inside the second waterproof box, forming a sealed cavity between the waterproof cover and the second waterproof box, and the second drive component is installed inside the sealed cavity.

[0012] Furthermore, the rotation drive assembly includes a first waterproof box, a first drive motor installed in the first waterproof box, and a drive shaft with one end coaxially fixedly connected to the first drive motor. The other end of the drive shaft is fixedly connected to the linear mounting assembly, and the lower end of the retractable rod is fixedly connected to the first waterproof box.

[0013] Furthermore, the rotation drive assembly also includes at least two support rods with one end fixedly connected to the first waterproof box, the other end of each support rod being rotatably connected to the linear mounting assembly, and the rotation centers of both support rods being located on the rotation center axis of the drive shaft.

[0014] Furthermore, the rotary drive assembly also includes at least one water-proof plate fixedly connected to the first waterproof box. Each water-proof plate is installed between the first drive motor and the linear mounting assembly, dividing the internal space of the first waterproof box into multiple waterproof cavities. The drive shaft is rotatably connected to each of the water-proof plates.

[0015] Furthermore, the positioning assembly includes at least two vertically arranged primary vertical rods, each fixedly connected at its lower end to the rotation drive assembly; at least one primary horizontal rod that is simultaneously vertically slidably connected to each of the primary vertical rods on one side; two secondary vertical rods that are horizontally slidably connected to the other side of each of the primary horizontal rods on one side; and three secondary horizontal rods. One end of the middle secondary horizontal rod is horizontally slidably connected to the other side of the primary horizontal rod, and one end of the other two secondary horizontal rods is vertically slidably connected to the other side of the two secondary vertical rods, respectively. The other ends of the three secondary horizontal rods are respectively fixedly connected to the three sampling bottles.

[0016] Furthermore, each of the mounting bases includes a lower rod connected to the linear mounting assembly at its lower end, a rotating seat fixedly connected to the upper end of the lower rod at its lower end, and an upper rod rotatably connected to the upper end of the rotating seat at its lower end. The upper ends of the three upper rods are respectively fixedly connected to the closed ends of the three sampling bottles.

[0017] The beneficial effects of this invention are as follows:

[0018] This water resource analysis uses sampling equipment at different depths. The rotation drive assembly drives the linear mounting assembly to achieve rotation in the vertical plane, thereby changing the rotation angle of the arrangement of each sampling bottle relative to the horizontal plane. Each sampling bottle is located at a different depth, so that water samples at different depths can enter each sampling bottle. Thus, sampling operations at different points can be carried out simultaneously by multiple sampling bottles, and sampling operations at points at different depths can be carried out by sampling bottles located at different depths, so as to improve the technical problem of low fixed-point sampling efficiency in the existing technology.

[0019] The water resource analysis uses sampling equipment at different depths. The second driving component drives the bidirectional threaded rod to rotate, causing the two mounting seats located on both sides to move towards each other or in opposite directions. This causes the two sampling bottles located on both sides to move towards each other or in opposite directions, thereby further changing the sampling point position and realizing sampling operations at different points.

[0020] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0021] Figure 1 This is an isometric view of the water resource analysis sampling equipment at different depths according to the present invention;

[0022] Figure 2 This is a partial structural schematic diagram of the water resource analysis sampling equipment at different depths according to the present invention.

[0023] Figure 3 This is a partial exploded view of the water resource analysis sampling equipment at different depths according to the present invention.

[0024] Figure 4 This is a first partial cross-sectional view of the water resource analysis sampling device at different depths according to the present invention.

[0025] Figure 5 This is a second partial cross-sectional view of the water resource analysis sampling device at different depths according to the present invention.

[0026] Figure 6 For the present invention Figure 5 A magnified view of part A in the image.

[0027] In the diagram: 1. Retractable rod; 2. Rotary drive assembly; 21. Waterproof housing No. 1; 22. Drive motor No. 1; 23. Drive shaft; 24. Support rod; 25. Waterproof baffle; 26. Power supply No. 1; 3. Linear mounting assembly; 31. Waterproof housing No. 2; 311. Slot; 312. Limiting slot; 313. Annular groove; 32. Bidirectional threaded rod; 33. Drive component No. 2; 34. Inner corrugated waterproof strip; 35. Outer corrugated protective cover; 36. Waterproof cover; 37. 1. Power supply No. 2; 4. Mounting base; 41. Lower rod; 411. Limit block; 42. Rotating seat; 43. Upper rod; 5. Sampling bottle; 6. Positioning assembly; 61. Primary vertical rod; 611. Primary vertical slot; 62. Primary horizontal rod; 621. Primary vertical block; 622. Horizontal slot; 63. Secondary vertical rod; 631. Horizontal block; 632. Secondary vertical slot; 64. Secondary horizontal rod; 641. Middle block; 642. Edge block. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] In the above description of the present invention, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is conventionally placed during use. These terms are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0033] Please see Figure 1-3 The present invention provides a technical solution: a water resource analysis sampling device at different depths, including a retractable rod 1, a rotation drive assembly 2 fixedly connected to the lower end of the retractable rod 1, and a linear mounting assembly 3 fixedly connected to the drive end of the rotation drive assembly 2. The linear mounting assembly 3 is equipped with three mounting seats 4 arranged in a straight line. The arrangement of each mounting seat 4 is located in the rotation plane of the linear mounting assembly 3, and each mounting seat 4 is rotatably connected to a sampling bottle 5 at its upper end. Each sampling bottle 5 has an open top structure. The sampling device also includes a positioning assembly 6 fixedly connected to the rotation drive assembly 2 and simultaneously fixedly connected to each sampling bottle 5. The positioning assembly 6 is used to keep each sampling bottle 5 vertically positioned.

[0034] During the sampling process, the rotary drive assembly 2, the linear mounting assembly 3, and each sampling bottle 5 are simultaneously lowered to the required sampling depth using the retractable rod 1. Sampling is then performed. During sampling, the rotary drive assembly 2 drives the linear mounting assembly 3 to rotate, causing it to rotate around the drive end of the rotary drive assembly 2 as its central axis, achieving rotation in the vertical plane. This causes the alignment of each sampling bottle 5 to change its rotation angle relative to the horizontal plane, placing each sampling bottle 5 at different depths to allow water samples from different depths to enter each bottle 5. After the water samples have entered each sampling bottle 5, the retractable rod 1 quickly lifts each sampling bottle 5 out. This allows for simultaneous sampling at different points using multiple sampling bottles 5, and sampling at different depths using bottles located at different depths, thus improving the low efficiency of fixed-point sampling in existing technologies.

[0035] During use, the upper end of the retractable rod 1 can be fixedly connected to the ship. Based on the above embodiment, the upper end of the retractable rod 1 can be fixedly connected to a linear drive mechanism such as a cylinder, electric cylinder, or worm gear, so as to control the extension and retraction of the retractable rod 1 within a certain range of length.

[0036] The retractable rod 1 is equipped with a length scale so that the lowering depth of the sampling bottle 5 can be intuitively understood.

[0037] Please see Figure 4-6 In this embodiment: the linear mounting assembly 3 includes a second waterproof box 31, a bidirectional threaded rod 32 with both ends rotatably connected to the second waterproof box 31, and a second driving component 33 with its driving end connected to the middle end of the bidirectional threaded rod 32. The bidirectional threaded rod 32 and the second driving component 33 are both installed inside the second waterproof box 31, and the threads at both ends of the bidirectional threaded rod 32 have opposite directions. The driving end of the rotary drive assembly 2 is fixedly connected to the second waterproof box 31. The mounting seat 4 located in the middle is fixedly connected to the second waterproof box 31, and the two mounting seats 4 located on both sides are slidably connected to the second waterproof box 31 and are threadedly connected to both ends of the bidirectional threaded rod 32.

[0038] While the second waterproof box 31 is rotated in the vertical plane by the rotation drive assembly 2, so that the three sampling bottles 5 are located at different depth sampling points, the bidirectional threaded rod 32 can be rotated by activating the second drive component 33, which drives the two mounting seats 4 located on both sides to move towards each other or in opposite directions, so that the two sampling bottles 5 located on both sides move towards each other or in opposite directions, thereby further changing the sampling point position and realizing sampling operations at different points.

[0039] The second driving component 33 includes a second motor, a driving gear coaxially rotatably connected to the output shaft of the second motor, and a driven gear meshing with the driving gear. The driven gear is coaxially fixedly connected to the middle end of the bidirectional threaded rod 32. When the second motor starts, the bidirectional threaded rod 32 rotates through the transmission of the driving gear and the driven gear.

[0040] In this embodiment: two slots 311 are formed through the upper side of the second waterproof box 31, and the middle ends of the two mounting seats 4 located on both sides are adapted to and slidably connected to the two slots 311 respectively; the linear mounting assembly 3 also includes two inner corrugated waterproof strips 34 adapted to and installed in the two slots 311 respectively. The two ends of the two inner corrugated waterproof strips 34 in the length direction are fixedly connected to the groove wall of the corresponding slot 311, and the middle end is sealed to the corresponding mounting seat 4. The two ends of the two inner corrugated waterproof strips 34 in the width direction are slidably connected to the groove wall of the corresponding slot 311.

[0041] The sliding of the mounting base 4 is limited by the slot 311, and the slot 311 is protected by the inner corrugated waterproof strip 34 to prevent water from entering the second waterproof box 31.

[0042] Among them, the groove arm of the slot 311 in the groove width direction is provided with a limiting groove 312, and the middle end of the corresponding mounting base 4 is formed with a limiting block 411 that is adapted to and slidably connected to the limiting groove 312, so as to limit the mounting base 4 and keep the mounting base 4 vertical relative to the second waterproof box 31.

[0043] The inner corrugated waterproof strip 34 can be made of rubber.

[0044] In this embodiment: the linear mounting assembly 3 also includes two outer corrugated protective covers 35, which are respectively fitted onto both ends of the second waterproof box 31, and both ends of each outer corrugated protective cover 35 are sealed to the second waterproof box 31. Two slots 311 are respectively located inside the two outer corrugated protective covers 35, and the middle ends of the two mounting bases 4 are respectively sealed to the two outer corrugated protective covers 35.

[0045] When the two sampling bottles 5 located on both sides move towards each other or in opposite directions, the two outer corrugated protective covers 35 undergo adaptive deformation. At the same time, the two outer corrugated protective covers 35 protect the two slots 311 respectively to prevent water from entering the second waterproof box 31.

[0046] The outer corrugated protective cover 35 can be made of rubber.

[0047] As one specific solution, one end of the outer corrugated protective cover 35 is open, and the open end is fitted and sealed to the second waterproof box 31, while the closed end abuts against the end side of the second waterproof box 31.

[0048] As one specific solution, both ends of the outer corrugated protective cover 35 are open.

[0049] In this embodiment, the linear mounting assembly 3 also includes a waterproof cover 36 installed inside the second waterproof box 31, forming a sealed cavity between the waterproof cover 36 and the second waterproof box 31, and the second drive component 33 is installed inside the sealed cavity.

[0050] The waterproof cover 36 further waterproofs the second drive component 33.

[0051] A second power supply 37 is also installed inside the sealed cavity so that the second motor of the second drive component 33 can be continuously powered through the second power supply 37.

[0052] Based on the above embodiment, an opening is provided at the bottom of the second waterproof tank 31, and the opening is filled with a sealing plug so that water that may enter the second waterproof tank 31 can be discharged by opening the sealing plug.

[0053] Please see Figure 4-6 In this embodiment: the rotation drive assembly 2 includes a first waterproof box 21, a first drive motor 22 installed in the first waterproof box 21, and a drive shaft 23 coaxially fixedly connected to the first drive motor 22 at one end. The other end of the drive shaft 23 is fixedly connected to the linear mounting assembly 3, and the lower end of the retractable rod 1 is fixedly connected to the first waterproof box 21.

[0054] During the rotation of the linear mounting assembly 3 driven by the rotation drive assembly 2, the first drive motor 22 is started, and the drive shaft 23 is driven to rotate by the first drive motor 22, thereby realizing the rotation of the linear mounting assembly 3.

[0055] The wall of the No. 2 waterproof box 31 has a through hole, and a No. 1 sealing ring is fixedly connected to the wall of the No. 1 through hole. The No. 1 sealing ring is fitted onto the drive shaft 23 to improve the sealing effect and reduce the possibility of water entering the No. 1 waterproof box 21 from the No. 1 through hole.

[0056] In this embodiment, the rotation drive assembly 2 further includes at least two support rods 24 with one end fixedly connected to the first waterproof box 21. The other end of the two support rods 24 is rotatably connected to the linear mounting assembly 3, and the rotation centers of the two support rods 24 are both located on the rotation center axis of the drive shaft 23.

[0057] During the rotation of the linear mounting assembly 3 driven by the rotation drive assembly 2, the two support rods 24 support the linear mounting assembly 3 to ensure smooth rotation of the linear mounting assembly 3.

[0058] An annular groove 313 is provided on the side wall of the second waterproof box 31 of the linear mounting assembly 3. The center of the annular groove 313 is located on the central axis of the drive shaft 23, and its cross-section is stepped or dovetail-shaped. The other ends of the two support rods 24 are adapted to and rotatably connected to the annular groove 313 to lock the two support rods 24 and prevent the two support rods 24 from detaching from the second waterproof box 31 of the linear mounting assembly 3.

[0059] In this embodiment, the rotary drive assembly 2 also includes at least one water-proof plate 25 fixedly connected to the first waterproof box 21. Each water-proof plate 25 is installed between the first drive motor 22 and the linear mounting assembly 3, and divides the internal space of the first waterproof box 21 into multiple waterproof cavities. The drive shaft 23 is rotatably connected to each water-proof plate 25.

[0060] Each baffle plate 25 forms a separation between the No. 1 drive motor 22 and the waterproof cavity, preventing water from entering the No. 1 waterproof box 21 through the through hole for the drive shaft 23 to rotate and affecting the operation of the No. 1 drive motor 22.

[0061] The cavity that is separated by the water-blocking plate 25 and used to install the No. 1 drive motor 22 is the storage cavity.

[0062] Each water-blocking plate 25 has a second through hole, and a second sealing ring (not shown in the figure) is fixedly connected to the wall of the second through hole. The second sealing ring is sleeved on the drive shaft 23 to improve the sealing effect and reduce the possibility of water entering the waterproof cavity entering the storage cavity through the second through hole.

[0063] Based on the above embodiment, a power supply 26 is also provided in the storage cavity. The power supply 26 is connected to the drive motor 22 so as to continuously supply power to the drive motor 22.

[0064] Please see Figure 2-3 In this embodiment, the positioning assembly 6 includes at least two vertically arranged primary vertical rods 61, the lower ends of which are fixedly connected to the rotation drive assembly 2; at least one primary horizontal rod 62, which is vertically slidably connected to each primary vertical rod 61 on one side; two secondary vertical rods 63, which are horizontally slidably connected to the other side of each primary horizontal rod 62 on one side; and three secondary horizontal rods 64. One end of the middle secondary horizontal rod 64 is horizontally slidably connected to the other side of the primary horizontal rod 62, and one end of the other two secondary horizontal rods 64 is vertically slidably connected to the other side of the two secondary vertical rods 63, respectively. The other ends of the three secondary horizontal rods 64 are fixedly connected to the three sampling bottles 5.

[0065] During the rotation of the linear mounting assembly 3 driven by the rotation drive assembly 2, the middle secondary crossbar 64 always remains in a horizontal position and drives the middle sampling bottle 5 to rotate, so that the middle sampling bottle 5 always remains vertical. At the same time, the secondary vertical bar 63 adaptably slides horizontally relative to the primary crossbar 62, and the other two secondary crossbars 64 adaptably slide vertically relative to the secondary vertical bar 63, so that the other two sampling bottles 5 always remain vertical.

[0066] Each of the two primary vertical rods 61 has a primary vertical groove 611, and each primary horizontal rod 62 has a primary vertical block 621 that is adapted to and vertically slidably connected to the two primary vertical grooves 611 on one side. The primary vertical rods 61 and the primary horizontal rods 62 are stably connected by the primary vertical block 621 being engaged with the primary vertical grooves 611, so as to prevent them from separating.

[0067] A transverse slot 622 is provided on the other side of each primary horizontal bar 62. A transverse locking block 631 is fixed on one side of each secondary vertical bar 63 and is adapted to and slidably connected to the transverse slot 622. The transverse locking block 631 is locked in the transverse slot 622 to prevent the secondary vertical bar 63 from separating from the primary horizontal bar 62.

[0068] Furthermore, one end of the middle secondary crossbar 64 is fixed with a middle locking block 641 that is adapted to and slidably connected to the transverse locking groove 622. The middle locking block 641 is locked in the transverse locking groove 622 to prevent the middle secondary crossbar 64 from separating from the primary crossbar 62.

[0069] Each secondary vertical rod 63 has a secondary vertical slot 632 on its other side. One end of each of the other two secondary horizontal rods 64 is fixed with an end block 642, which is adapted to and vertically slidably connected to the two secondary vertical slots 632. The end blocks 642 engage with the corresponding secondary vertical slots 632 to prevent the secondary horizontal rods 64 from detaching from the secondary vertical rods 63.

[0070] Furthermore, the cross-sections of the primary vertical slot 611, the horizontal slot 622, and the secondary vertical slot 632 are all stepped slots or dovetail slots.

[0071] Please see Figure 5-6 In this embodiment, each mounting base 4 includes a lower rod 41 connected to the linear mounting assembly 3 at its lower end, a rotating base 42 fixedly connected to the upper end of the lower rod 41 at its lower end, and an upper rod 43 rotatably connected to the upper end of the rotating base 42 at its lower end. The upper ends of the three upper rods 43 are respectively fixedly connected to the closed ends of the three sampling bottles 5.

[0072] When the linear mounting assembly 3 rotates to adjust the angle, each sampling bottle 5 and each upper rod 43 simultaneously rotates adaptively relative to their corresponding rotating seats 42 to achieve angle adjustment, ensuring that each sampling bottle 5 remains vertical.

[0073] As a parallel embodiment of the present invention, the other ends of the three secondary crossbars 64 are respectively fixedly connected to the corresponding upper bar 43.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A water resource analysis sampling device at different depths, characterized in that: The device includes a retractable rod (1), a rotation drive assembly (2) fixedly connected to the lower end of the retractable rod (1), and a linear mounting assembly (3) fixedly connected to the drive end of the rotation drive assembly (2). The linear mounting assembly (3) is equipped with three mounting seats (4) arranged in a straight line. The arrangement of each mounting seat (4) is located in the rotation plane of the linear mounting assembly (3), and each of them is rotatably connected to a sampling bottle (5) at its upper end. Each sampling bottle (5) has an open top structure. The sampling device also includes a positioning assembly (6) fixedly connected to the rotation drive assembly (2) and simultaneously fixedly connected to each sampling bottle (5). The positioning assembly (6) is used to keep each sampling bottle (5) vertically positioned.

2. The water resource analysis sampling equipment at different depths according to claim 1, characterized in that: The linear mounting assembly (3) includes a second waterproof box (31), a bidirectional threaded rod (32) rotatably connected to the second waterproof box (31) at both ends, and a second driving member (33) whose driving end is connected to the middle end of the bidirectional threaded rod (32). The bidirectional threaded rod (32) and the second driving member (33) are both installed inside the second waterproof box (31). The threads at both ends of the bidirectional threaded rod (32) have opposite directions. The driving end of the rotary drive assembly (2) is fixedly connected to the second waterproof box (31). The mounting seat (4) located in the middle is fixedly connected to the second waterproof box (31), and the two mounting seats (4) located on both sides are slidably connected to the second waterproof box (31) and threadedly connected to both ends of the bidirectional threaded rod (32).

3. The water resource analysis sampling equipment at different depths according to claim 2, characterized in that: The second waterproof box (31) has two slots (311) through the upper side, and the middle ends of the two mounting seats (4) located on both sides are adapted to and slidably connected to the two slots (311); the straight mounting assembly (3) also includes two inner corrugated waterproof strips (34) adapted to and installed in the two slots (311), the two ends of the two inner corrugated waterproof strips (34) in the length direction are fixedly connected to the groove wall of the corresponding slot (311), and the middle end is sealed to the corresponding mounting seat (4), and the two ends of the two inner corrugated waterproof strips (34) in the width direction are slidably connected to the groove wall of the corresponding slot (311).

4. The water resource analysis sampling equipment at different depths according to claim 3, characterized in that: The linear mounting assembly (3) also includes two outer corrugated protective covers (35), which are respectively fitted onto both ends of the second waterproof box (31), and both ends of each outer corrugated protective cover (35) are sealed to the second waterproof box (31). The two slots (311) are respectively located inside the two outer corrugated protective covers (35), and the middle ends of the two mounting bases (4) are respectively sealed to the two outer corrugated protective covers (35).

5. The water resource analysis sampling equipment at different depths according to claim 2, characterized in that: The linear mounting assembly (3) further includes a waterproof cover (36) installed inside the second waterproof box (31), and a sealed cavity is formed between the waterproof cover (36) and the second waterproof box (31), and the second drive unit (33) is installed inside the sealed cavity.

6. The water resource analysis sampling equipment at different depths according to claim 1, characterized in that: The rotation drive assembly (2) includes a first waterproof box (21), a first drive motor (22) installed in the first waterproof box (21), and a drive shaft (23) coaxially fixedly connected to the first drive motor (22) at one end. The other end of the drive shaft (23) is fixedly connected to the linear mounting assembly (3), and the lower end of the retractable rod (1) is fixedly connected to the first waterproof box (21).

7. The water resource analysis sampling equipment at different depths according to claim 6, characterized in that: The rotation drive assembly (2) further includes at least two support rods (24) with one end fixedly connected to the first waterproof box (21), and the other end of the two support rods (24) is rotatably connected to the linear mounting assembly (3), and the rotation center of the two support rods (24) is located on the rotation center axis of the drive shaft (23).

8. The water resource analysis sampling equipment at different depths according to claim 6, characterized in that: The rotary drive assembly (2) further includes at least one water-proof plate (25) fixedly connected to the first waterproof box (21). Each water-proof plate (25) is installed between the first drive motor (22) and the linear mounting assembly (3), and divides the internal space of the first waterproof box (21) into multiple waterproof cavities. The drive shaft (23) is rotatably connected to each water-proof plate (25).

9. The water resource analysis sampling equipment at different depths according to any one of claims 1-8, characterized in that: The positioning assembly (6) includes at least two vertically arranged primary vertical rods (61) whose lower ends are fixedly connected to the rotation drive assembly (2), at least one primary horizontal rod (62) that is vertically slidably connected to each of the primary vertical rods (61) on one side, two secondary vertical rods (63) that are horizontally slidably connected to the other side of each of the primary horizontal rods (62) on one side, and three secondary horizontal rods (64). One end of the middle secondary horizontal rod (64) is horizontally slidably connected to the other side of the primary horizontal rod (62), and one end of the other two secondary horizontal rods (64) is vertically slidably connected to the other side of the two secondary vertical rods (63), and the other ends of the three secondary horizontal rods (64) are fixedly connected to the three sampling bottles (5).

10. The water resource analysis sampling equipment at different depths according to any one of claims 1-8, characterized in that: Each of the mounting bases (4) includes a lower rod (41) connected to the lower end of the linear mounting assembly (3), a rotating seat (42) fixedly connected to the upper end of the lower rod (41) at its lower end, and an upper rod (43) rotatably connected to the upper end of the rotating seat (42) at its lower end. The upper ends of the three upper rods (43) are respectively fixedly connected to the closed ends of the three sampling bottles (5).

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