A sewage sampling device

Abstract

The present invention belongs to the technical field of sewage sampling, and specifically relates to a sewage sampling device. The device is connected to a water inlet mechanism via a plurality of telescopic cylinders. When the water inlet mechanism descends in water, the increase in water pressure causes a silicone sliding plug to slide upward along the inner wall of the water inlet pipe to expose the water outlet of the water inlet pipe. Simultaneously, a crank connecting rod drives a first rubber plug to disengage from the exhaust port. At this point, the water inlet pipe is connected to a water storage tank, and water flows from the water inlet through the water inlet pipe, the water outlet, and the water delivery pipe into the water storage tank. When the water inlet mechanism ascends in water, the decrease in water pressure causes the silicone sliding plug to slide downward along the inner wall of the water inlet pipe to block the water outlet of the water inlet pipe. Simultaneously, a crank connecting rod drives the first rubber plug to block the exhaust port. At this point, the water inlet pipe is disconnected from the water storage tank, and the water storage tank is in a sealed state. This allows the sampling of sewage at a specific level based on the strength of the water pressure, while also preventing the mixing of sewage at different levels.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage sampling, and particularly relates to a sewage sampling device. Background Art

[0002] When conducting inspections and research on the water environment in the wild, it is necessary to use a sampling device to collect water samples, and then analyze them to understand the specific water environment conditions. The existing water sample collection device uses a foldable push rod to make the sampler itself shorter and easier to carry. Although it can quickly take samples, it does not solve the sampling needs of existing sewage sampling devices for different levels of sewage. Samplers are required to go down into the designated sewage layer to take samples. For example, the patent with authorization announcement number CN212340714U discloses a sampling device with a sealing groove that can seal the water intake, so that the sampler has a storage effect and increases the use function of the sampler, but it is not convenient for automatic water collection of sewage at a specific level. For this reason, we propose a sewage sampling device. Summary of the Invention

[0003] The present invention provides a sewage sampling device, which is first connected to a water inlet mechanism through several telescopic cylinders and inserted into sewage at a specified level. Then, according to the change of water pressure in sewage at different levels, a silicone sliding plug is caused to slide up and down along the inner wall of the water inlet pipe to connect or disconnect the water inlet pipe and the water storage tank, thereby achieving the purpose of automatically sampling sewage at a specific level.

[0004] In order to solve the above technical problems, the present invention provides a sewage sampling device, comprising: a plurality of telescopic cylinders movably mounted from the inside to the outside; a water inlet mechanism, a water storage mechanism, and an adjustment mechanism respectively located below the telescopic cylinder; wherein the water inlet mechanism comprises: a water inlet pipe, located below the telescopic cylinder, with a water inlet provided at its lower end and a water outlet provided at its side; a silicone sliding plug, slidably arranged inside the water inlet pipe; the water storage mechanism comprises: a water storage tank, located on one side of the water inlet pipe; a water supply pipe, with its two ends respectively connected to the water outlet and the water storage tank; an exhaust port, located on the water storage tank; a first rubber plug, located on the exhaust port; a crank connecting rod, with its two ends respectively connected to the silicone sliding plug and the first rubber plug; and the adjustment mechanism is suitable for adjusting the sliding power of the silicone sliding plug.

[0005] Furthermore, a first slide groove suitable for the crank connecting rod to pass through is opened on one side of the water inlet pipe; a positioning connecting handle is fixedly provided on one side of the water inlet pipe; a second slide groove is opened on the positioning connecting handle; and a sliding rod sliding along the second slide groove is fixedly provided on one side of the crank connecting rod.

[0006] Furthermore, the sewage sampling device also includes a water intake mechanism located on the water storage mechanism; the water intake mechanism includes: a drain outlet, located on the water storage tank; a second rubber plug, detachably installed on the drain outlet; wherein the drain outlet and the exhaust port are respectively arranged on opposite sides of the water storage tank.

[0007] Furthermore, the adjustment mechanism includes: an adjusting screw, the upper end of which is located inside the telescopic cylinder, and the lower end of which is inserted into the water inlet pipe; a spring, located in the water inlet pipe, the lower end of which is connected to the silicone sliding plug, and the upper end of which is connected to the adjusting screw; wherein a first limiting ring is provided at the water inlet; the silicone sliding plug is limited between the spring and the first limiting ring; the adjusting screw is suitable for moving up and down along the telescopic cylinder to adjust the elastic force of the spring on the silicone sliding plug.

[0008] Furthermore, the adjustment mechanism also includes an adjusting screw barrel movably installed at the upper end of the water inlet pipe; the adjusting screw barrel is connected to the adjusting screw rod through an internal thread; the lower end of the adjusting screw barrel is connected to the upper end of the spring through a first connecting plate; a second connecting plate is provided at the lower end of the spring; and the second connecting plate is connected to the silicone sliding plug by rotating the round head.

[0009] Furthermore, the adjustment mechanism also includes an adjustment nut threadedly connected to the adjustment screw; the adjustment nut is located between the water inlet pipe and the telescopic cylinder to limit the adjustment screw.

[0010] Furthermore, the sewage sampling device also includes a protective shell for accommodating a water inlet mechanism; an installation groove is provided at the upper end of the protective shell, and the adjusting screw passes through the installation groove through a bearing seat; and the water inlet pipe is installed inside the protective shell through a number of fixed connecting columns.

[0011] Furthermore, a plurality of water inlet holes are provided on the side and / or bottom of the protective shell.

[0012] Furthermore, there are multiple telescopic cylinders; the ends of each telescopic cylinder are connected through telescopic cylinder threads; a second limiting ring is provided at the connection of the telescopic cylinder threads; a gripping handle is provided at the upper end of the innermost telescopic cylinder; and a non-slip rubber pad is sleeved on the gripping handle.

[0013] The beneficial effects of the present invention are:

[0014] The present invention connects a water inlet mechanism through a plurality of telescopic cylinders, thereby adjusting the length of the sampling device and facilitating the collection of sewage at different levels. When the water inlet mechanism descends in the water, the increase in water pressure causes the silicone sliding plug to slide upward along the inner wall of the water inlet pipe to expose the water outlet of the water inlet pipe, and at the same time, the crank connecting rod drives the first rubber plug to disengage the exhaust port. At this time, the water inlet pipe is connected to the water storage tank, and water flows from the water inlet through the water inlet pipe, the water outlet, and the water pipe into the water storage tank in sequence. When the water inlet mechanism moves upward in the water, the decrease in water pressure causes the silicone sliding plug to slide downward along the inner wall of the water inlet pipe to block the water outlet of the water inlet pipe, and at the same time, the crank connecting rod drives the first rubber plug to block the exhaust port. At this time, the water inlet pipe is disconnected from the water storage tank, and the water storage tank is in a closed state. That is, sewage at a specific level can be collected according to the strength of the water pressure, and the mixing of sewage at different levels can be avoided. The sampling personnel do not need to go down into the sewage to take samples, and the operation is convenient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a schematic diagram of the structure of the sewage sampling device from a top view;

[0017] Figure 2 It is a schematic diagram of the structure of the sewage sampling device when viewed from an upward angle;

[0018] Figure 3 It is a schematic diagram of the internal structure of the sewage sampling device;

[0019] Figure 4 This is a schematic diagram of the structure of the sewage sampling device (excluding the protective shell) when viewed from above;

[0020] Figure 5 This is a schematic diagram of the structure of the sewage sampling device (excluding the protective shell) from a top view;

[0021] In the picture:

[0022] Telescopic cylinder 1, second limiting ring 11, gripping handle 12, anti-slip rubber pad 13, telescopic cylinder thread 14;

[0023] Water inlet mechanism 2, water inlet pipe 21, water inlet 211, water outlet 212, first chute 213, silicone sliding plug 22;

[0024] Water storage mechanism 3, water storage tank 31, water pipe 32, exhaust port 33, first rubber stopper 34, crank connecting rod 35, positioning connecting handle 36, second slide groove 361, slide rod 37;

[0025] Water intake mechanism 4, water outlet 41, second rubber stopper 42;

[0026] Adjustment mechanism 5, adjustment screw 51, spring 52, second connecting plate 521, rotating round head 522, first limiting ring 53, adjustment screw barrel 54, first connecting plate 541, adjustment nut 55;

[0027] Protective shell 6, mounting groove 61, bearing seat 611, fixed connecting column 62, water inlet hole 63. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] See Figure 1-Figure 5 This embodiment provides a sewage sampling device, comprising: a plurality of telescopic cylinders 1 movably sleeved from the inside to the outside; a water inlet mechanism 2, a water storage mechanism 3, and an adjustment mechanism 5 respectively located below the telescopic cylinder 1; wherein the water inlet mechanism 2 comprises: a water inlet pipe 21 located below the telescopic cylinder 1, with a water inlet 211 at its lower end and a water outlet 212 at its side; a silicone sliding plug 22 slidably arranged inside the water inlet pipe 21; the water storage mechanism 3 comprises: a water storage tank 31 located on one side of the water inlet pipe 21; a water delivery pipe 3 2, whose two ends are respectively connected to the water outlet 212 and the water tank 31; the exhaust port 33 is located on the water tank 31; the first rubber plug 34 is located on the exhaust port 33; the crank connecting rod 35, whose two ends are respectively connected to the silicone sliding plug 22 and the first rubber plug 34; the adjusting mechanism 5 is suitable for adjusting the sliding power of the silicone sliding plug 22, so that the silicone sliding plug 22 slides along the inside of the water inlet pipe 21 under the combined action of the water pressure and the adjusting mechanism, so as to open or block the water outlet 212, thereby connecting the water inlet pipe to or disconnecting the water tank 31.

[0030] Specifically, the silicone sliding plug 22 will slide upward under the action of water pressure. Therefore, before collecting sewage, the downward thrust of the adjustment mechanism 5 on the silicone sliding plug 22 is adjusted based on the depth of the sewage at the level to be collected, through multiple trials or empirical values. Under the combined effects of water pressure and thrust, the silicone sliding plug 22 enters the sewage at the level to be collected and then slides along the interior of the water inlet pipe 21. Generally, the multiple trials are performed as follows: first, based on empirical values, the elastic force of the adjustment mechanism 5 on the silicone sliding plug 22 is adjusted to be greater than the pressure exerted by the sewage at that level on the silicone sliding plug 22, ensuring that no sewage is collected from the water storage tank 31 during the first adjustment. Then, the elastic force of the adjustment mechanism 5 on the silicone sliding plug 22 is gradually reduced, so that the sewage strength at the level to be collected is greater than the thrust of the adjustment mechanism 5 on the silicone sliding plug 22, and the sewage strength of the layer above the level to be collected is less than the thrust of the adjustment mechanism 5 on the silicone sliding plug 22, which serves as the set thrust. This ensures that the water inlet pipe 21 is connected to the water storage tank 31 in the sewage layer to be collected, and the water inlet pipe 21 is disconnected from the water storage tank 31 in the upper sewage layer to be collected, thereby realizing the hierarchical collection of sewage. After adjusting the set thrust, for example, when the water inlet mechanism 2 descends in the water, the water pressure gradually increases. When the mechanism enters the sewage layer to be sampled or continues to descend a certain distance in the sewage layer to be sampled, the water pressure is greater than the set thrust, and the silicone sliding plug 22 slides upward along the inner wall of the water inlet pipe 21 to expose the water outlet 212. At the same time, the silicone sliding plug 22 drives the first rubber plug 34 to disengage from the exhaust port 33 through the crank connecting rod 35. At this time, the water inlet pipe 21 is connected to the water storage tank 31, and water flows from the water inlet 211 through the water inlet pipe 21, the water outlet 212, the water pipe 32 and into the water outlet 212. In the water storage tank 31, sewage collection at a specific level is achieved; when the collection is completed, the water inlet mechanism 1 moves upward in the water, and the water pressure gradually decreases. When the water entering the mechanism leaves the sewage at the level to be sampled or is about to leave the sewage at the level to be sampled, the water pressure is less than the set thrust, and the silicone sliding plug 22 slides downward along the inner wall of the water inlet pipe 21 to block the water outlet 212. At the same time, the silicone sliding plug 22 drives the first rubber plug 34 to block the exhaust port 33 through the crank connecting rod 35. At this time, the water inlet pipe 21 is disconnected from the water storage tank 31, and the water storage tank 31 is in a closed state to avoid cross-mixing of sewage at different levels.

[0031] Furthermore, in order to ensure that the crank connecting rod 35 can maintain stable sliding and does not move or deflect during adjustment, Figure 5 A first sliding groove 213 suitable for the crank connecting rod 35 to pass through is opened on one side of the water inlet pipe 21; a positioning handle 36 is fixedly provided on one side of the water inlet pipe 21; a second sliding groove 361 is opened on the positioning handle 36; and a sliding rod 37 sliding along the second sliding groove 361 is fixedly provided on one side of the crank connecting rod 35.

[0032] As an optional implementation of the water intake mechanism.

[0033] In order to facilitate the removal of collected sewage, see Figure 4 The sewage sampling device further includes a water intake mechanism 4 located on the water storage mechanism 3; the water intake mechanism 4 includes a drain port 41 located on the water storage tank 31; a second rubber stopper 42 detachably mounted on the drain port 41 and manually removed from the drain port; the drain port 41 and the exhaust port 33 are located on opposite sides of the water storage tank 31. Preferably, the drain port 41 is located below the water storage tank 31, and the exhaust port 331 is located above the water storage tank 31.

[0034] As an optional implementation of the adjustment mechanism.

[0035] See Figure 3 and Figure 4 The adjustment mechanism 5 includes: an adjustment screw 51, whose upper end is located inside the telescopic cylinder 1 and whose lower end is inserted into the water inlet pipe 21; a spring 52, located inside the water inlet pipe 21, whose lower end is connected to the silicone sliding plug 22 and whose upper end is connected to the adjustment screw 51; wherein a first limiting ring 53 is provided at the water inlet 211; the silicone sliding plug 22 is limited between the spring 52 and the first limiting ring 53; the adjustment screw 51 is suitable for moving up and down along the telescopic cylinder 1 to adjust the elastic force of the spring 52 on the silicone sliding plug 22. In addition, the adjustment mechanism 5 also includes an adjustment nut 55 threadedly connected to the adjustment screw 51; the adjustment nut 55 is located between the water inlet pipe 21 and the telescopic cylinder 1 and can be fixed to the protective housing 6 to limit the autonomous movement of the adjustment screw 51 and maintain the elastic force of the spring 52 on the silicone sliding plug 22. At the same time, the first limiting ring 53 can also prevent the silicone sliding plug 22 from falling off.

[0036] Furthermore, in order to realize the rotation adjustment of the adjusting screw 51, the adjusting mechanism 5 also includes an adjusting screw barrel 54 movably mounted on the upper end of the water inlet pipe 21; the adjusting screw barrel 54 is fixedly connected to the adjusting screw 51 through an internal thread; the lower end of the adjusting screw barrel 54 is connected to the upper end of the spring 52 through a first connecting plate 541; the lower end of the spring 52 is provided with a second connecting plate 521; and the second connecting plate 521 is rotatably connected to the silicone sliding plug 22 through a rotating round head 522 to prevent the silicone sliding plug 22 from rotating with the adjusting screw barrel 54. Generally, when adjusting the set thrust, the adjusting screw 51 is manually rotated first, and due to the limiting effect of the adjusting nut 55, the adjusting screw 51 rotates upward or downward. For example, Figure 3During operation, the adjusting screw 51 is manually rotated clockwise downward, driving the adjusting screw barrel 54 to rotate and move downward along the inner wall of the water inlet pipe 21 along with the adjusting screw 51, driving the silicone sliding plug 22 to move downward along the inner wall of the water inlet pipe 21 until it contacts the first limiting ring 53, thereby blocking the water outlet 212 on the lower side wall of the water inlet pipe 21, and preventing sewage from entering the water storage tank 31. At the same time, the spring 52 is in a compressed state, exerting a downward thrust on the silicone sliding plug 22. Preferably, the first limiting ring 53 is provided at the water inlet 211, so that when the silicone sliding plug 22 contacts the first limiting ring 53, sewage cannot enter the water inlet pipe 21 and the water storage tank 31, thereby preventing sewage from different levels from being temporarily stored in the water inlet pipe 21 when the water inlet mechanism 2 moves downward, thereby contaminating the sewage at the level to be tested.

[0037] In this case, since the side wall of the silicone sliding plug 22 is in close contact with the inner wall of the water inlet pipe 21, the movement trajectory of the silicone sliding plug 22 is upward to disengage from the water inlet 211 and downward to close the water inlet 211, thereby allowing a movement gap to remain between the side wall of the adjusting screw 54 and the inner wall of the water inlet pipe 21. When the silicone sliding plug 22 moves upward to disengage from the water inlet 211, the water inlet 211 is opened, but the water entering the water inlet pipe 21 from the upper end is blocked by the silicone sliding plug 22 and cannot enter the water inlet 211. During the downward movement of the water inlet mechanism 2, the sewage temporarily stored in the water inlet pipe 21 will not enter the water storage tank 31 and will not contaminate the sewage at the level to be measured.

[0038] Further, see Figure 1 and Figure 2 The sewage sampling device further comprises a protective shell 6 for accommodating the water inlet mechanism 2, and the protective shell 6 is detachably mounted on the lower end of the telescopic cylinder 1. Figure 3 The upper end of the protective housing 6 is provided with a mounting slot 61. The adjusting screw 51 passes through the mounting slot 61 via a bearing seat 611, facilitating the rotation of the adjusting screw 51. The adjusting nut 55 can be fixedly mounted on the outside of the mounting slot 61. The water inlet pipe 21 is mounted inside the protective housing 6 via a plurality of fixed connecting columns 62, allowing the water inlet pipe 21 to be fixedly mounted inside the protective housing 6.

[0039] Preferably, see Figure 1 and Figure 2 The side and / or bottom of the protective shell 6 are provided with a plurality of water inlet holes 63, so that sewage can quickly enter the interior of the protective shell 6 and then enter the water inlet.

[0040] As an optional implementation of the telescopic cylinder.

[0041] In order to implement the extension adjustment of the sampling device, facilitate the collection of sewage at different levels (depths), ensure the limitation, locking and anti-falling of the sampling device, and maintain the characteristics of stable connection, see Figure 1 、 Figure 4 and Figure 5 There are multiple telescopic cylinders 1; the ends of each telescopic cylinder 1 are connected by a telescopic cylinder thread 14, and a second limiting ring 11 is provided at the connection of the telescopic cylinder thread 14; a gripping handle 12 is provided at the upper end of the innermost telescopic cylinder; and a non-slip rubber pad 13 is sleeved on the gripping handle 12 to achieve fixed holding and anti-slip of the sampling device.

[0042] Preferably, there are multiple telescopic cylinders, for example, when there are four telescopic cylinders, namely a first telescopic cylinder, a second telescopic cylinder, a third telescopic cylinder, and a fourth telescopic cylinder; their connection relationship is as follows: the second telescopic cylinder is movably provided inside the first telescopic cylinder, the third telescopic cylinder is movably provided inside the second telescopic cylinder, and the fourth telescopic cylinder is movably provided inside the third telescopic cylinder. A second limiting ring is fixedly mounted on the inner side of the bottom of each of the first telescopic cylinder, the second telescopic cylinder, and the third telescopic cylinder; an internally threaded connecting ring with the telescopic cylinder thread 14 is fixedly mounted on the inner side of the upper end of each of the first telescopic cylinder, the second telescopic cylinder, and the third telescopic cylinder; and an externally threaded connecting ring with the telescopic cylinder thread 14 is fixedly mounted on the outer side of the bottom of each of the second telescopic cylinder, the third telescopic cylinder, and the fourth telescopic cylinder, and the externally threaded connecting ring is threadedly connected to the internally threaded connecting ring.

[0043] The working process of this sewage sampling device is as follows:

[0044] (1) Adjusting the length. When in use, pull the second telescopic cylinder and rotate it when it reaches the top of the first telescopic cylinder, so that the external threaded connection ring on the outside of the bottom end of the second telescopic cylinder can be threadedly connected with the internal threaded connection ring on the top end of the first telescopic cylinder to achieve locking. Then, the same method is used to expand the third and fourth telescopic cylinders.

[0045] (2) Adjust the set thrust. Before collection, adjust the downward thrust of the regulating mechanism 5 on the silicone sliding plug 22 according to the depth of the sewage in the layer to be collected through multiple attempts or empirical values. Under the combined effect of water pressure and thrust, the silicone sliding plug 22 enters the sewage in the layer to be collected and then slides along the inside of the water inlet pipe 21. The strength of the sewage in the layer to be collected is greater than the thrust of the regulating mechanism 5 on the silicone sliding plug 22, and the strength of the sewage in the layer above the layer to be collected is less than the thrust of the regulating mechanism 5 on the silicone sliding plug 22. This serves as the set thrust.

[0046] (3) Sewage collection at the level to be measured. Place the sampling device into the sewage, and by pressing down the handle, the protective shell will sink into the specific sewage layer. The water pressure will push the silicone sliding plug upward, opening the water inlet. At this time, the spring will be forced to contract, allowing the sewage to enter the inside of the water inlet pipe, and then enter the inside of the water storage tank through the water pipe. The elasticity of the spring is adjusted by the adjustment screw before sampling. After the spring is squeezed and contracted, the sewage enters the inside of the water inlet pipe; when the spring contracts, the silicone sliding plug drives the crank connecting rod to rise, and one end of the crank connecting rod opens the first rubber plug in the exhaust port, exhausting the gas, allowing the sewage to enter the inside of the water storage tank; when the sampling device moves upward, the water pressure decreases, and the spring resets to push the silicone sliding plug to close the water inlet, and at the same time drives the first rubber plug to close the exhaust port, so that the water storage tank is in a closed state.

[0047] (4) Take out the collected sewage. Manually open the second rubber stopper so that the sewage in the water storage tank can be discharged from the drain port and collected through the test tube.

[0048] In the description of the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0049] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0050] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of the units is merely a logical functional division, and actual implementation may have other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not implemented.

[0051] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A sewage sampling device, characterized in that: include: Several telescopic cylinders are movably mounted from the inside to the outside; The water inlet mechanism, water storage mechanism and regulating mechanism are respectively located below the telescopic cylinder; in The water inlet mechanism comprises: The water inlet pipe is located below the telescopic cylinder, with a water inlet at its lower end and a water outlet at its side; A silicone sliding plug, slidingly arranged inside the water inlet pipe; The water storage mechanism comprises: Water storage tank, located on one side of the water inlet pipe; A water pipe, with both ends connected to the water outlet and the water storage tank respectively; exhaust port, located on the water storage tank; a first rubber stopper, located on the exhaust port; A crank connecting rod, with two ends thereof connected to a silicone sliding plug and a first rubber plug respectively; The regulating mechanism is used to regulate the sliding power of the silicone sliding plug; A first sliding groove for the crank connecting rod to pass through is provided on one side of the water inlet pipe; A positioning handle is fixedly provided on one side of the water inlet pipe; A second sliding groove is provided on the positioning handle; and A sliding rod sliding along the second sliding groove is fixedly provided on one side of the crank connecting rod; The regulating mechanism comprises: An adjusting screw, the upper end of which is located inside the telescopic cylinder and the lower end of which is inserted into the water inlet pipe; The spring is located in the water inlet pipe, with its lower end connected to the silicone sliding plug and its upper end connected to the adjusting screw; A first limiting ring is provided at the water inlet; The silicone sliding plug is limited between the spring and the first limiting ring; The adjusting screw can move up and down along the telescopic cylinder to adjust the elastic force of the spring on the silicone sliding plug; When the sampling device is put into a specific sewage layer, the water pressure will push the silicone sliding plug upward, the spring will contract under force, the sewage will enter the inside of the water inlet pipe, and the silicone sliding plug will drive the crank connecting rod to rise; one end of the crank connecting rod will open the first rubber plug, and the sewage can enter the inside of the water storage tank; when the sampling device moves upward, the spring resets and pushes the silicone sliding plug to close the water inlet, the first rubber plug closes the exhaust port, and the water storage tank is in a closed state.

2. The sewage sampling device according to claim 1, characterized in that: The sewage sampling device further comprises a water intake mechanism located on the water storage mechanism; The water intake mechanism comprises: Drain outlet, located on the water storage tank; The second rubber plug is detachably mounted on the drain outlet; The drain outlet and the exhaust outlet are respectively arranged on opposite sides of the water storage tank.

3. The sewage sampling device according to claim 1, characterized in that: The regulating mechanism further comprises a regulating screw barrel movably mounted on the upper end of the water inlet pipe; The adjusting screw barrel is connected to the adjusting screw rod via an internal thread; The lower end of the adjusting screw is connected to the upper end of the spring through a first connecting plate; A second connecting plate is provided at the lower end of the spring; and The second connecting plate is rotatably connected to the silicone sliding plug by rotating the round head.

4. The sewage sampling device according to claim 1, characterized in that: The adjustment mechanism further includes an adjustment nut threadedly connected to the adjustment screw; The adjusting nut is located between the water inlet pipe and the telescopic cylinder to limit the adjusting screw.

5. The sewage sampling device according to claim 1, characterized in that: The sewage sampling device further includes a protective housing for accommodating a water inlet mechanism; The upper end of the protective shell is provided with a mounting slot, and the adjusting screw passes through the mounting slot via a bearing seat; and The water inlet pipe is installed inside the protective shell through a plurality of fixed connecting columns.

6. The sewage sampling device according to claim 5, characterized in that: The side and / or bottom of the protective shell are provided with a plurality of water inlet holes.

7. The sewage sampling device according to claim 1, characterized in that: There are multiple telescopic cylinders; The ends of each telescopic cylinder are connected by telescopic cylinder threads; A second limiting ring is provided at the connection point of the telescopic cylinder thread; A handle is provided at the upper end of the innermost telescopic cylinder; and A non-slip rubber pad is sleeved on the gripping handle.

Images