A sampling device for environmental detection

Abstract

The utility model provides a kind of sampling equipment for environmental detection, solve the problem that after sampling cylinder enters water, upper water source can directly enter sampling cylinder, leading to the detection result of the water source of sampling cannot accurately reflect the water source pollution degree close to riverbed bottom.The utility model includes sampling cylinder and conical head fixedly arranged at the bottom of sampling cylinder, the weight of conical head is greater than the weight of sampling cylinder;The lower end of sampling cylinder is closed by the upper end surface of conical head, water inlet hole is opened on the lower end outer wall of sampling cylinder, one-way valve is arranged in water inlet hole, and drainage hole is arranged in the upper part of sampling cylinder;The upper end of sampling cylinder is detachably provided with a cover for closing its upper port, a movable rod capable of moving up and down is arranged through the cover, the lower end of movable rod extends into sampling cylinder and is fixedly connected with the top of sealing plate, sealing plate is slidably arranged in sampling cylinder, and the outer diameter of sealing plate is equal to the inner diameter of sampling cylinder, resistance plate is arranged on movable rod, and resistance plate is located above cover.

Description

Technical Field

[0001] This utility model relates to the field of environmental monitoring technology, and in particular to a sampling device for environmental monitoring. Background Technology

[0002] Water quality monitoring involves monitoring and measuring the types of pollutants in water bodies, the concentrations of various pollutants, and their changing trends. Currently, water quality monitoring services on the market can provide data and information for environmental management and can provide a basis for evaluating the water quality of rivers and oceans. However, the water in the upper layer of the riverbed is flowing water, and some pollutants and impurities in the water usually settle at the bottom of the riverbed. Therefore, for water environment testing, the values ​​detected by water sources located at the bottom of the riverbed are more accurate.

[0003] To sample water from the bottom of a riverbed, patent application number 201921867197.3 discloses a sampling device for water environment monitoring, including a sampling cylinder. The sampling cylinder has a sealing disc threaded inside. A pull rod is fixedly connected to the center of the upper outer surface of the sealing disc. A rotating disc is fixedly connected to the top of the pull rod. A rope is attached to the upper outer surface of the rotating disc, and a fixing ring is attached to one end of the rope. A water inlet is provided on the outer surface of the sampling cylinder near the lower end. A groove is provided on the inner surface of the sampling cylinder near the water inlet. A slider is installed inside the groove. A sealing plate is fixedly connected to one side of the outer surface of the slider, and a ring is fixedly connected to the bottom end of the sealing plate.

[0004] However, during use, the following defects were found in the sampling device: the water inlet on the sampling tube is opened by the conical head hitting the riverbed surface. The conical head forces the sealing plate to move upward, thereby opening the water inlet. However, in actual use, when the sampling tube enters the water, the conical head collides with the water surface. Due to the resistance of the water, the conical head directly pushes the sealing plate upward, causing the water inlet to open. The surface water directly enters the sampling tube. The sampling tube only has a water inlet at its lower end. As the sampling tube sinks, the water from the upper layer cannot be quickly replaced by the water from the lower layer after entering the sampling tube. As a result, the test results of the sampled water cannot accurately reflect the pollution level of the water near the bottom of the riverbed. Utility Model Content

[0005] To address the problem in the prior art where, after the sampling tube is submerged, the upper water source directly enters the sampling tube, causing the test results of the sampled water source to fail to accurately reflect the pollution level of the water source near the bottom of the riverbed, this utility model proposes a sampling device for environmental monitoring.

[0006] The technical solution of this utility model is: a sampling device for environmental testing, including a sampling tube and a conical head fixed at the bottom of the sampling tube, wherein the weight of the conical head is greater than the weight of the sampling tube;

[0007] The sampling tube is a cylindrical structure that is open at both ends. The lower end of the sampling tube is closed by the upper end face of the conical head. A water inlet is provided on the outer wall of the lower end of the sampling tube. A one-way valve is provided in the water inlet. The water inlet direction of the one-way valve is from the outside to the inside of the sampling tube. A drain hole is provided at the upper part of the sampling tube.

[0008] The upper end of the sampling cylinder is detachably equipped with a cover for sealing its upper port. A movable rod that can move up and down is passed through the cover. The lower end of the movable rod extends into the sampling cylinder and is fixedly connected to the top of the sealing plate. The sealing plate is slidably disposed in the sampling cylinder, and the outer diameter of the sealing plate is equal to the inner diameter of the sampling cylinder. A resistance plate is provided on the movable rod. The resistance plate is located above the cover, and the diameter of the resistance plate is greater than the outer diameter of the sampling cylinder.

[0009] When the movable rod and sealing plate fall naturally under their own weight, the sealing plate is located between the water inlet and the drain hole; when the resistance plate moves the movable rod and sealing plate upward under the action of water resistance, the sealing plate is located above the drain hole.

[0010] The sampling tube is detachably connected to one end of the rope, and the other end of the rope is detachably connected to the wristband.

[0011] Preferably, a retaining ring is fixedly fitted at the lower end of the sampling tube, and the retaining ring is located below the water inlet.

[0012] Preferably, the baffle ring is provided with several first water passage grooves that are open at both the top and bottom.

[0013] Preferably, a downwardly extending water inlet guide pipe is fixedly connected to the water inlet hole, and the lower end of the water inlet guide pipe is located directly above the first water passage trough.

[0014] Preferably, the upper sidewall of the sampling cylinder is connected to a plurality of first connecting rods arranged circumferentially around it, and the end of the first connecting rod away from the sampling cylinder is located on the outside of the resistance plate;

[0015] A perforated plate is provided above the resistance plate, and a second water passage groove that is open at both ends is provided on the perforated plate. The diameter of the perforated plate is larger than the diameter of the resistance plate. The end of the first connecting rod away from the sampling cylinder is connected to the perforated plate by a thread.

[0016] A third rope loop is fixedly installed on the top of the hollow plate. The third rope loop is detachably connected to one end of the rope, and the other end of the rope is detachably connected to the wristband.

[0017] Preferably, the outer side of the resistance plate bends downward to form an inverted bowl-shaped structure.

[0018] Preferably, the sampling cylinder includes, from bottom to top, a head unit cylinder, several middle unit cylinders, and a tail unit cylinder. The upper end of the head unit cylinder can be detachably and sealed to the lower end of the middle unit cylinder and the lower end of the tail unit cylinder. The upper end of the middle unit cylinder can be detachably and sealed to the lower end of the tail unit cylinder. The upper and lower ends of any two middle unit cylinders at their joint can be detachably and sealed to each other.

[0019] The water inlet is located on the side wall of the head unit cylinder, and the top of the cone-shaped head is fixed at the lower end of the head unit cylinder. The drain hole is located on the side wall of the tail unit cylinder, and the cover can be detached at the upper port of the tail unit cylinder.

[0020] Preferably, the conical head has a mud-taking trough with a lower opening inside.

[0021] Advantages of this invention: During the sinking process of this sampling device, the lower layer of water continuously enters the sampling cylinder through the inlet hole. Under the action of water resistance, the water-blocking plate drives the movable rod and sealing plate to move upward until the sealing plate abuts against the bottom of the cover, and the drain hole opens, so that the upper layer of water that enters the sampling cylinder first is continuously replaced by the drain hole. Thus, after the conical head lands on the riverbed, the sampling of the bottom layer of water near the riverbed can be completed.

[0022] After sampling is completed, during the upward lifting of the sampling tube, the water-blocking plate, under the action of water resistance, pushes the movable rod and sealing plate downwards rapidly. A portion of the water sample is discharged through the drain hole. The sealing plate then returns below the drain hole. Due to the obstruction of the one-way valve and the sealed drain hole, the remaining water sample in the sampling tube no longer exchanges with the upper water source. This allows the test results of the sampled water source to relatively accurately reflect the actual pollution level of the water source near the riverbed bottom. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the main structure of Example 1;

[0025] Figure 2 for Figure 1 A schematic diagram of the internal structure of the sampling tube in the sampler;

[0026] Figure 3 for Figure 1 A top-view structural diagram of the retaining ring;

[0027] Figure 4 for Figure 2 A structural schematic diagram of the tail unit tube and its components;

[0028] Figure 5 for Figure 2 A top-view structural diagram of the perforated panel and its top components.

[0029] In the diagram, 1. Conical head, 101. Mud trough, 2. Head unit cylinder, 201. One-way valve, 3. Inlet guide pipe, 4. Baffle ring, 401. First water passage trough, 5. Middle unit cylinder, 6. Tail unit cylinder, 601. Drain hole, 7. Cover, 8. Movable rod, 9. Sealing plate, 10. Resistance plate, 11. Limit nut, 12. First connecting rod, 13. First rope ring, 14. Thread, 15. Hollow plate, 1501. Second water passage trough, 16. Second connecting rod, 17. Second rope ring, 18. Third connecting rod, 19. Third rope ring, 20. Rope, 21. Hand ring. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Example 1: A sampling device for environmental monitoring, such as... Figure 1 and Figure 2 As shown, the device includes a sampling cylinder and a conical head 1 fixedly mounted at the bottom of the sampling cylinder. The conical head 1 has a mud-collecting trough 101 with a lower opening inside. The weight of the conical head 1 is greater than the weight of the sampling cylinder so that when thrown into the water, the conical head 1 can naturally face downwards.

[0032] The sampling tube is a cylindrical structure that is open at both ends, and the lower end of the sampling tube is closed by the upper end face of the conical head 1. To allow the sampling volume of the sampling cylinder to be adjusted as needed, in this embodiment, the sampling cylinder includes, from bottom to top, a head unit cylinder 2, several middle unit cylinders 5, and a tail unit cylinder 6. The upper ends of the head unit cylinder 2, middle unit cylinders 5, and tail unit cylinder 6 are each provided with an inner connecting ring, and the outer surface of the inner connecting ring is provided with an external thread. The lower ends of the middle unit cylinders 5 and tail unit cylinder 6 are each provided with an outer connecting ring, and the inner sidewall of the outer connecting ring is provided with an internal threaded hole that is threadedly connected to the inner connecting ring. The outer connecting ring can be fitted onto the outer side of the inner connecting ring and sealed through the threaded connection. This allows for a detachable and sealed connection between the upper end of the head unit cylinder 2 and the lower ends of the middle unit cylinders 5 and the tail unit cylinder 6, a detachable and sealed connection between the upper end of the middle unit cylinder 5 and the lower end of the tail unit cylinder 6, and a detachable and sealed connection between the upper and lower ends of any two middle unit cylinders 5 at their joint.

[0033] A water inlet hole is provided on the side wall of the head unit cylinder 2, and a one-way valve 201 is provided in the water inlet hole. The water inlet direction of the one-way valve 201 is from the outside to the inside of the sampling cylinder.

[0034] To facilitate smoother water flow into the sampling tube during settling, such as Figure 2 As shown, a downwardly extending water inlet guide pipe 3 is fixedly connected to the water inlet hole. The lower end of the water inlet guide pipe 3 is located directly above the first water passage trough 401.

[0035] To prevent the conical head 1 from inserting too deeply into the silt on the riverbed, which could cause the silt to clog the water inlet hole and water inlet guide pipe 3 on the head unit cylinder 2, such as... Figure 2 As shown, a retaining ring 4 is fixedly fitted at the lower end of the head unit cylinder 2, and the retaining ring 4 is located below the water inlet. To reduce the water resistance affecting the retaining ring 4, as shown... Figure 3 As shown, the retaining ring 4 is provided with several first water passages 401 that are open at both the top and bottom.

[0036] To facilitate the discharge of the water sample that enters the sampling tube during the settling process, such as Figure 4 As shown, a drainage hole 601 is provided on the side wall of the tail unit cylinder 6.

[0037] A cap 7 is threaded onto the upper port of the tail unit cylinder 6 to seal the upper port of the tail unit cylinder 6. A movable rod 8 that can move up and down is threaded onto the cap 7. In this embodiment, the movable rod 8 adopts a screw structure. The lower end of the movable rod 8 extends into the sampling cylinder and is fixedly connected to the top of the sealing plate 9. The sealing plate 9 is slidably disposed in the sampling cylinder, and the outer diameter of the sealing plate 9 is equal to the inner diameter of the sampling cylinder.

[0038] A resistance plate 10 is fitted onto the movable rod 8, and two limiting nuts 11 are threadedly connected to it. The two limiting nuts 11 are located on the upper and lower sides of the resistance plate 10, respectively. The resistance plate 10 is located above the cover 7, and its diameter is larger than the outer diameter of the sampling cylinder. To facilitate the rapid upward movement of the movable rod 8 and the sealing plate 9 after the resistance plate 10 enters the water, as follows... Figure 4 As shown, the outer side of the resistance plate 10 bends downward to form an inverted bowl-shaped structure.

[0039] When the movable rod 8 and the sealing plate 9 fall naturally under their own weight, the sealing plate 9 is located between the water inlet and the drain hole 601; when the resistance plate 10 moves the movable rod 8 and the sealing plate 9 upward under the action of water resistance, the sealing plate 9 is located above the drain hole 601.

[0040] To ensure that the sampling tube and rope 20 form a roughly straight line after connection, so that the sampling tube can be quickly adjusted to a vertical position by the cone head 1 after entering the water, such as... Figure 2 and Figure 4 As shown, the upper side wall of the tail unit cylinder 6 is connected to several first connecting rods 12 arranged circumferentially around it. The end of the first connecting rod 12 away from the sampling cylinder is fixed with a first rope ring 13, which is located outside the resistance plate 10.

[0041] A perforated plate 15 is provided above the resistance plate 10, such as... Figure 5 As shown, the perforated plate 15 is provided with a second water passage 1501 that is open at both the top and bottom. The diameter of the perforated plate 15 is larger than the diameter of the resistance plate 10. The bottom of the perforated plate 15 is fixedly connected to a second rope ring 17 through a second connecting rod 16. The first rope ring 13 is connected to the second rope ring 17 by a thread 14.

[0042] The top of the hollow plate 15 is fixedly connected to a third rope ring 19 via a third connecting rod 18. The third rope ring 19 is tied to one end of the rope 20, and the other end of the rope 20 is tied to the wristband 21.

[0043] Working principle: When sampling is required, the sampling tube is thrown into the river. Under its own gravity, the sampling tube and the conical head 1 sink rapidly. During this process, because the weight of the conical head 1 is greater than the weight of the sampling tube, the rapid pull of the conical head 1 causes the sampling tube to reach a vertical position. At the same time, the water-blocking plate 10, under the action of water resistance, drives the movable rod 8 and the sealing plate 9 to move upward until the sealing plate 9 abuts against the bottom of the cover 7, and the drainage hole 601 opens.

[0044] During the water inlet process, the lower layer of water continuously enters the sampling tube through the inlet hole, while the upper layer of water that enters the sampling tube first is continuously replaced by the drain hole 601 until the cone head 1 falls on the riverbed. The mud sampling trough 101 completes the sampling of the silt on the riverbed, and the retaining ring 4 falls on the riverbed to prevent the cone head 1 from sinking into the silt, so that the lower end of the water inlet guide pipe 3 can always be in contact with the water source.

[0045] When sampling is completed, the sampling tube is pulled upward by the rope 20. Under the action of water resistance, the water-blocking plate 10 pushes the movable rod 8 and the sealing plate 9 to move downward quickly. After a part of the water sample is discharged through the drain hole 601, the sealing plate 9 returns to the bottom of the drain hole 601. Blocked by the one-way valve 201, the remaining water sample can be lifted out of the sampling tube and preserved at the water surface.

[0046] Finally, pull the movable lever 8 upwards to open the drain hole 601, and pour the water sample in the sampling tube into the container through the drain hole 601.

[0047] Example 2: A sampling device for environmental monitoring. This example differs from Example 1 in that the first connecting rod 12, the first rope loop 13, and the perforated plate 15 are no longer included; one end of the rope 20 is directly tied to the sampling cylinder. The other structures are the same as in Example 1.

[0048] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims and not by the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A sampling device for environmental monitoring, characterized in that: It includes a sampling tube and a conical head (1) fixed at the bottom of the sampling tube, the weight of which is greater than the weight of the sampling tube; The sampling tube is a cylindrical structure that is open at both ends. The lower end of the sampling tube is closed by the upper end face of the conical head (1). A water inlet hole is provided on the outer wall of the lower end of the sampling tube. A one-way valve (201) is provided in the water inlet hole. The water inlet direction of the one-way valve (201) is from the outside to the inside of the sampling tube. A drain hole (601) is provided at the upper part of the sampling tube. The upper end of the sampling tube is detachably provided with a cover (7) for sealing its upper port. A movable rod (8) that can move up and down is provided on the cover (7). The lower end of the movable rod (8) extends into the sampling tube and is fixedly connected to the top of the sealing plate (9). The sealing plate (9) is slidably provided in the sampling tube, and the outer diameter of the sealing plate (9) is equal to the inner diameter of the sampling tube. A resistance plate (10) is provided on the movable rod (8). The resistance plate (10) is located above the cover (7), and the diameter of the resistance plate (10) is greater than the outer diameter of the sampling tube. When the movable rod (8) and the sealing plate (9) fall naturally under their own gravity, the sealing plate (9) is located between the water inlet and the drain hole (601); when the resistance plate (10) drives the movable rod (8) and the sealing plate (9) to move upward under the action of water resistance, the sealing plate (9) is located above the drain hole (601). The sampling tube is detachably connected to one end of the rope (20), and the other end of the rope (20) is detachably connected to the wristband (21).

2. The sampling device for environmental monitoring as described in claim 1, characterized in that: The lower end of the sampling tube is fixedly fitted with a retaining ring (4), which is located below the water inlet.

3. The sampling device for environmental monitoring as described in claim 2, characterized in that: The baffle ring (4) is provided with several first water passages (401) that are open at the top and bottom.

4. The sampling device for environmental monitoring as described in claim 3, characterized in that: A downwardly extending water inlet guide pipe (3) is fixedly connected to the water inlet hole, and the lower end of the water inlet guide pipe (3) is located directly above the first water passage (401).

5. The sampling device for environmental monitoring as described in claim 1, characterized in that: The upper sidewall of the sampling tube is connected to several first connecting rods (12) arranged circumferentially around it, and the end of the first connecting rod (12) away from the sampling tube is located on the outside of the resistance plate (10); A perforated plate (15) is provided above the resistance plate (10). A second water passage (1501) with vertical penetration is provided on the perforated plate (15). The diameter of the perforated plate (15) is larger than the diameter of the resistance plate (10). The end of the first connecting rod (12) away from the sampling tube is connected to the perforated plate (15) by a wire (14). A third rope ring (19) is fixedly provided on the top of the hollow plate (15). The third rope ring (19) is detachably connected to one end of the rope (20), and the other end of the rope (20) is detachably connected to the wrist ring (21).

6. The sampling device for environmental monitoring as described in claim 1, characterized in that: The outer side of the resistance plate (10) bends downward to form an inverted bowl-shaped structure.

7. A sampling device for environmental monitoring as described in any one of claims 1-6, characterized in that: The sampling tube includes, from bottom to top, a head unit tube (2), several middle unit tubes (5), and a tail unit tube (6). The upper end of the head unit tube (2) can be detachably and sealed to the lower end of the middle unit tube (5) and the lower end of the tail unit tube (6). The upper end of the middle unit tube (5) can be detachably and sealed to the lower end of the tail unit tube (6). The upper and lower ends of any two middle unit tubes (5) can be detachably and sealed to each other. The water inlet is located on the side wall of the head unit cylinder (2), and the top of the cone head (1) is fixed at the lower end of the head unit cylinder (2). The drain hole (601) is located on the side wall of the tail unit cylinder (6), and the cover (7) can be detached at the upper port of the tail unit cylinder (6).

8. The sampling device for environmental monitoring as described in claim 1, characterized in that: The cone-shaped head (1) has a mud-taking trough (101) with a lower opening inside.

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