Medical sewage stratified sampling device

Abstract

The invention relates to the technical field of sewage sampling devices, in particular to a medical sewage stratified sampling device which comprises a base, a first storage groove is formed in the center of the top of the base, and a plurality of second storage grooves are formed in the top of the base in the circumferential direction of the first storage groove; a heuristic assembly is arranged in the first storage tank, a water body sampler is arranged in each second storage tank, each water body sampler comprises a sampling pipe and a water pumping assembly arranged on the sampling pipe, and the bottom of each sampling pipe is connected with the heuristic assembly. According to the device, sewage at different depths can be sampled and stored at the same time, and the accuracy and representativeness of sewage samples are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage sampling devices, and more specifically, to a medical sewage stratified sampling device. Background Art

[0002] Medical sewage is generated during various medical operations and contains a complex variety of pollutants, including not only chemical agent residues and radioactive substances, but also a large number of pathogenic microorganisms, viruses, and pathological tissue fragments. In hospital construction projects, specialized medical sewage treatment processes and equipment are required to ensure that the sewage meets the specified discharge standards after treatment. Therefore, sampling and testing of medical sewage after purification treatment is a key link in evaluating the treatment results.

[0003] Common medical sewage sampling methods are relatively single. Usually, staff members put the bottle into the medical sewage pool for sampling. This method obviously has limitations: on the one hand, since the sewage components at different depths in the medical sewage pool are different, single-point sampling at a single time is difficult to reflect the true treatment situation of the sewage, resulting in a lack of representativeness of the sample; on the other hand, during the process of lifting the sampling bottle in the sewage pool, the internal sample cannot be effectively sealed, resulting in mixed pollution of sewage at different depths during the lifting process, causing inaccuracy in sampling. The above problems are extremely likely to lead to misjudgment of whether the medical sewage meets the standard, affecting the scientificity and reliability of the evaluation of the sewage treatment effect. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a medical sewage stratified sampling device, which can simultaneously sample and preserve sewage at different depths, and avoid mixed pollution of sewage at different depths, improving the accuracy and representativeness of the sampling sample.

[0005] The technical solution adopted by the present invention to solve its technical problems is: A medical sewage stratified sampling device includes a base. A first storage groove is opened at the center of the top of the base, and a plurality of second storage grooves are circumferentially opened on the top of the base around the first storage groove; an inspiration component is arranged inside the first storage groove, and a water body sampler is arranged inside each second storage groove. The water body sampler includes a sampling pipe and a water pumping component placed on the sampling pipe, and the bottom of each sampling pipe is respectively connected to the inspiration component.

[0006] Compared with the prior art, the beneficial effects of the present invention are: The present invention places a plurality of water body samplers on the base, which can sample and preserve sewage at different depths. By taking out sewage samples at different depths at one time through this device, the accuracy and representativeness of the sewage samples are ensured.

[0007] As a preference, a further technical solution of the present invention is: Preferably, the inspiration component includes a rod body. An inspiration rope is arranged at the top of the rod body. A frustum is arranged at the bottom of the rod body. A limiting cylinder is arranged at the bottom of the frustum. Strip-shaped holes are circumferentially and spacedly arranged on the cylinder wall of the limiting cylinder, and the strip-shaped holes correspond to the second storage grooves one by one. A first magnet is arranged on the lower surface of the frustum, and the first magnet is placed inside the limiting cylinder. A boss is arranged at the center position of the bottom of the first storage groove. A second magnet that attracts the first magnet is arranged on the upper surface of the boss. An annular cavity is formed between the limiting cylinder and the lower part of the first storage groove after being inserted and the boss.

[0008] Preferably, a rope hole is respectively arranged inside the base corresponding to each second storage groove. The second storage groove is communicated with the first storage groove through the rope hole. A limiting rope is respectively arranged in each rope hole. One end of the limiting rope is connected to the bottom of the water sampler, and the end of the other end extends into the annular cavity through the strip-shaped hole, and a limiting ball is arranged at the extended end.

[0009] Preferably, a limiting ball is arranged at one end of the limiting rope away from the sampling tube. The diameter of the limiting ball is smaller than the inner diameter of the rope hole and larger than the width of the strip-shaped hole.

[0010] Preferably, the pumping component includes a lower cover, an upper cover and a piston. The sampling tube is a structure that is penetrated up and down. The lower cover is placed at the bottom of the sampling tube, and the limiting rope is fixedly connected to the bottom of the lower cover. The piston is placed inside the sampling tube. A first pulling rope is arranged at the bottom of the piston. The end of the first pulling rope away from the piston penetrates through the lower cover and is connected to the bottom of the second storage groove. The upper cover is placed at the top of the sampling tube, and a water inlet hole is arranged on the upper cover. Floating balls are arranged around the outer circumference of the upper cover.

[0011] Preferably, the water sampler further includes a sealing component. The sealing component includes a stop block, a hook and a sliding rod. The hook is placed at the lower part of the sliding rod and is fixedly connected to the sliding rod. First sliding grooves are respectively arranged at both ends of the lower cover. The upper part of the sliding rod penetrates through the first sliding grooves and extends into the sampling tube, and the sliding rod is slidably connected to the first sliding grooves. The hook is placed below the lower cover. Second sliding grooves are respectively arranged at both ends of the upper cover. A stop block is slidably arranged in each second sliding groove. Second pulling ropes are respectively arranged on the opposite sides of the two stop blocks. The second pulling ropes are connected to the hook through the rope loops arranged at their ends. One end of each stop block provided with a second pulling rope is also respectively connected to the inner wall of the corresponding second sliding groove through a telescopic spring.

[0012] Preferably, a limiting block is respectively arranged at the bottom of each first sliding groove, and the limiting block is placed outside the hook.

[0013] Preferably, a silt sampler is arranged at the bottom of the base. The silt sampler includes a sampling box and a base. The base is placed at the bottom of the base and is fixedly connected to the base. A receiving cavity is arranged on the lower end surface of the base. The sampling box is placed in the receiving cavity and is slidably connected to the receiving cavity. A slideway is provided at the lower part of the base corresponding to the accommodation cavity. A mudguard is slidably connected inside the slideway. A return spring is arranged inside the slideway. One end of the return spring is connected to the inner wall of the slideway, and the other end is connected to the slide plate.

[0014] Preferably, a first ventilation hole is opened at the top of the sampling box. The inner cavity of the sampling box communicates with the accommodation cavity through the first ventilation hole. A second ventilation hole is opened at the top of the base corresponding to the accommodation cavity.

[0015] Preferably, a first slope is provided at the bottom of the sampling box; a second slope adapted to the first slope is provided on the side of the mudguard close to the sampling box. Description of the Drawings

[0016] Figure 1 It is the overall external view of the first embodiment; Figure 2 It is Figure 1 the half-sectional view of; Figure 3 It is the semi-sectional perspective view of the base part; Figure 4 the half-sectional view of the water sampler; Figure 5 It is Figure 4 the enlarged partial view A of; Figure 6 It is Figure 4 the enlarged partial view B of; Figure 7 It is the schematic diagram of the overall working state of the present invention; Figure 8 It is Figure 7 the enlarged partial view C of; Figure 9 It is Figure 7 the enlarged partial view D of; Figure 10 It is Figure 7 the enlarged partial view E of; Figure 11 It is the structural schematic diagram of the bottom of the inspiration component; Figure 12 It is the perspective view of the working state of the present invention in the first embodiment; Figure 13 It is the perspective view of the upper cover of the present invention; Figure 14 It is the overall external view of the second embodiment; Figure 15 It is Figure 13 the semi-sectional perspective view of; Figure 16 It is the structural schematic diagram after the sludge sampler; Description of the reference numerals: 1. Base; 101. First storage groove; 102. Second storage groove; 103. Annular cavity; 104. Boss; 105. Second magnet; 106. Rope hole; 107. Circular baffle 2. Inspiration component; 201. Rod body; 202. Frustum; 203. First magnet; 204. Limiting cylinder; 205. Hanging ring; 206. Inspiration rope; 207. Strip-shaped hole; 208. Hanging ear 3. Water sampler; 301. Sampling pipe; 302. Piston; 303. Upper cover; 3031. Water inlet; 3032. Water inlet groove; 3033. Second chute; 304. Lower cover; 3041. First chute; 305. First pulling rope; 306. Limiting rope; 307. Limiting ball; 308. Floating ball; 309. Second pulling rope; 310. Rope loop; 311. Hook; 312. Slide bar; 313. Telescopic spring; 314. Block; 315. Limiting block 4. Silt sampler; 401. Base; 402. Sampling box; 403. Mud guard; 404. First ventilation hole; 405. Second ventilation hole; 406. Accommodation cavity; 407. Return spring; 408. Slide table; 409. Slideway; 410. First slope; 411. Second slope Specific implementation manners

[0017] Next, in combination with the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention

[0018] Embodiment 1: A medical sewage stratified sampling device includes a columnar base 1 with its own weight. A first storage groove 101 is provided at the center of the top of the base 1, and an inspiration component 2 is arranged inside the first storage groove 101. The base 1 is circumferentially provided with a plurality of second storage grooves 102 around the first storage groove 101 at its top. In this embodiment, four second storage grooves 102 are provided, and each second storage groove 102 is respectively provided with a water sampler 3. Each water sampler 3 is respectively composed of a sampling pipe 301 and a pumping component. The pumping component is placed inside the sampling pipe 301, and the bottom of the sampling pipe 301 is connected to the inspiration component 2

[0019] The inspiration component 2 includes a rod body 201, a hanging ring 205 is fixedly connected to the top of the rod body 201, and an inspiration rope 206 is connected to the hanging ring 205. A round table 202 is fixedly connected to the bottom of the rod body 201, and a limiting cylinder 204 is installed at the bottom of the round table 202. The limiting cylinder 204 has a plurality of strip holes 207 spaced around the central axis of the limiting cylinder 204 on its cylinder wall. The strip holes 207 are arranged one by one corresponding to the second storage slots 102, that is, in this embodiment, four strip holes 207 are arranged.

[0020] A first magnet 203 is installed at the center position of the lower surface of the truncated cone 202, and the first magnet 203 is placed inside the limiting cylinder 204; a boss 104 is provided at the center of the bottom of the first storage groove 101, and a second magnet 105 attracted to the first magnet 203 is installed on the upper surface of the boss 104; when the inspiration component 2 is not in use, in order to avoid relative movement between the limiting cylinder 204 and the boss 104, the first magnet 203 and the second magnet 105 are attracted to each other before the inspiration component 2 is used, and after the limiting cylinder 204 is inserted into the bottom of the first storage groove 101, an annular cavity 103 is formed between the limiting cylinder 204 and the boss 104.

[0021] In this embodiment, a circular baffle 107 is installed on the top of the first storage groove 101. A through hole is opened in the middle of the circular baffle 107 to facilitate the passage of the rod body 201, and the aperture of the through hole is smaller than the outer diameter of the round table 202, so that the circular baffle 107 can block the round table 202 and prevent the rod body 201 from escaping from the first storage groove 101.

[0022] The top surface of the circular baffle 107 is also fixedly connected with a hanging ear 208 for conveniently hanging a receiving and releasing rope. The whole device is assisted in lowering by the receiving and releasing rope, so that the whole device slowly falls to the bottom of the water, thereby improving the stability of the whole device.

[0023] A rope hole 106 is respectively opened inside the base 1 corresponding to each second storage slot 102, and each second storage slot 102 is connected to the bottom of the first storage slot 101 through its corresponding rope hole 106; a limiting rope 306 is passed through each rope hole 106, one end of the limiting rope 306 is connected to the bottom of the water sampler 3, and the other end passes through the strip hole 207 and extends to the inside of the annular cavity 103, and a limiting ball 307 is fixedly connected to its extended end.

[0024] In this embodiment, in order to ensure that the limiting cylinder 204 can block and limit the limiting ball 307, the diameter of the limiting ball 307 must be larger than the width of the strip hole 207; in order to ensure that the limiting ball 307 can pass through the rope hole 106, the diameter of the limiting ball 307 must be smaller than the inner diameter of the rope hole 106.

[0025] The water body sampler 3 is composed of a sampling tube 301, a water pumping assembly, and a sealing assembly. The water pumping assembly is composed of a lower cover 304, an upper cover 303, and a piston 302. The sampling tube 301 has a structure that is penetrated up and down. The lower cover 304 is fixedly installed at the bottom of the sampling tube 301. One end of the limiting rope 306 away from the limiting ball 307 is fixedly connected to the bottom of the lower cover 304.

[0026] The piston 302 is placed inside the sampling tube 301 and is slidably and sealingly connected to the inner wall of the sampling tube 301. A first pulling rope 305 is arranged at the bottom of the piston 302. One end of the first pulling rope 305 away from the piston 302 penetrates through the lower cover 304 and is fixedly connected to the bottom of the second storage groove 102 where it is located. And the length of the first pulling rope 305 is greater than the length of the limiting rope 306.

[0027] The upper cover 303 is placed on the top of the sampling tube 301. A plurality of floating balls 308 are installed around the outer circumference of the upper cover 303 along its central axis. By providing buoyancy through the floating balls 308, the water body sampler 3 floats automatically. After the inspiration assembly 2 contacts and releases the restriction on the limiting rope 306, the water body sampler 3 floats until the first pulling rope 305 is straightened. At this time, the target sampling area is reached. Since the piston 302 is pulled and no longer floats, while the sampling tube 301 continues to float, a relative displacement occurs between the piston 302 and the sampling tube 301, thereby completing the water pumping.

[0028] As Figure 4 shown, water inlets 3031 are respectively opened along the radial direction at the front and rear ends of the upper cover 303. An inlet groove 3032 that communicates with the water inlets 3031 is opened at the bottom of the upper cover 303. When the sampling tube 301 pumps water, sewage enters the inside of the upper cover 303 through the water inlets 3031 and flows into the sampling tube 301 through the inlet groove 3032.

[0029] The sealing assembly is composed of a stop block 314, a hook 311, and a sliding rod 312. First sliding grooves 3041 are respectively opened at the left and right ends of the lower cover 304. Each first sliding groove 3041 is respectively provided with a sliding rod 312. The upper part of the sliding rod 312 penetrates through the first sliding groove 3041 and extends into the inside of the sampling tube 301; the hook 311 is placed at the lower part of the sliding rod 312 and is fixedly connected to the outer side of the sliding rod 312, and the hook 311 is located below the lower cover 304. A limiting block 315 is also respectively connected to the bottom of each first sliding groove 3041. The limiting block 315 is placed on the outer side of the hook 311.

[0030] In this embodiment, there is a certain frictional force between the sliding rod 312 and the lower cover 304 to ensure that the sliding rod 312 will not fall due to its own gravity and needs to be extruded by an external force to fall.

[0031] On the left and right ends of the upper cover 303, second sliding grooves 3033 communicating with the water inlet 3031 are respectively formed along the radial direction thereof. A stopper 314 is slidably disposed in each second sliding groove 3033. Second pull ropes 309 are respectively fixedly connected to the opposite sides of the two stoppers 314. A rope loop 310 is provided at the end of the second pull rope 309 away from the stopper 314, and the rope loop 310 is connected to the hook 311 on the same side thereof; Expansion springs 313 are respectively provided on the opposite sides of the two stoppers 314, and each stopper 314 is connected to the inner wall of the respective second sliding groove 3033 through the corresponding expansion spring 313. During the water pumping process of the sampling tube 301, under the influence of the buoyancy of the floating ball 308, when the sampling tube 301 moves upward, the lower cover 304 and the piston 302 continuously approach until the piston 302 presses the sliding rod 312, and the sliding rod 312 and the hook 311 move downward, causing the rope loop 310 to fall off the hook 311. The stopper 314 is no longer restricted by the second pull rope 309 and resets under the action of the elastic force of the expansion spring 313, cutting off the communication between the water inlet 3031 of the upper cover 303 and the water inlet groove 3032, and completing the blocking of the sampling tube 301.

[0032] In this embodiment, the lengths of the first pull ropes 305 are different, and the sampling positions are also different. Therefore, the four water body samplers 3 can be respectively provided with pull ropes of different lengths to sample sewage at different depths.

[0033] Before the actual use of this device, the piston 302 is placed at the uppermost end of the sampling tube 301. The loop 310 of the second drawstring 309 of each plugging component is connected to the hook 311, so that the two stoppers 314 are in a separated state. The first magnet 203 and the second magnet 105 attract each other. Then, pull the retractable rope to slowly lower the whole device into the sewage pool until the whole device reaches the bottom of the pool. At the same time, the triggering rope 206 also descends accordingly. Then, pull the triggering rope 206 to use the triggering rope 206 to pull the rod body 201 to separate the first magnet 203 and the second magnet 105. At the same time, the limiting cylinder 204 moves upward along with the rod body 201, so that the limiting cylinder 204 contacts and limits the limiting ball 307. The water sampler 3 floats upward under the action of the floating ball 308 until the first drawstring 305 is straightened. At this time, the water sampler 3 reaches the specified depth. Since each piston 302 is not floating upward under the influence of the pulling force of its corresponding first drawstring 305, while the sampling tube 301 continues to float upward under the action of the floating ball 308. Therefore, while the piston 302 and the sampling tube 301 have a relative displacement, the sewage enters through the water inlet 3031 of the upper cover 303 and enters the sampling tube 301 through the water inlet groove 3032. As the sampling tube 301 gradually moves upward, the bottom of the piston 302 contacts the slide bar 312 at the bottom of the sampling tube 301 and gradually presses down the slide bar 312 until the bottom of the piston 302 contacts the lower cover 304. At this time, the sampling tube 301 is filled with sewage. At the same time, since the piston 302 presses down the slide bar 312, the hook 311 is separated from the loop 310 due to moving downward along with the slide bar 312. Therefore, the stopper 314 is no longer restricted by the second drawstring 309 and is pushed out by the telescopic spring 313 to cut off the passage between the water inlet 3031 and the water inlet groove 3032, completing the plugging of the sampling bottle, that is, the sampling work is completed. Then, lift the whole device from the sewage pool through the triggering rope 206 or the retractable rope. Pull the second drawstring 309 to pour out the sewage in the sampling tube 301 and store it separately.

[0034] The present invention is provided with a plurality of water samplers 3, which can separately sample and store the sewage at different depths, so that the sewage samples at different depths can be taken out together, ensuring the representativeness of the sewage samples and improving the accuracy of the samples.

[0035] Embodiment 2: On the basis of Embodiment 1, a silt sampler 4 is further provided at the bottom of the base 1 of this embodiment. The silt sampler 4 is composed of a sampling box 402 and a base 401. The base 401 is placed at the bottom of the base 1 and fixedly connected to the base 1. Accommodation cavities 406 are respectively opened at the left and right ends of the lower end surface of the base 401, and the sampling box 402 is placed in the accommodation cavities 406.

[0036] The top of the sampling box 402 is provided with a first ventilation hole 404. The inner cavity of the sampling box 402 communicates with the accommodation cavity 406 through the first ventilation hole 404. The base 401 is provided with a second ventilation hole 405 corresponding to the top of the accommodation cavity 406. The second ventilation hole 405 communicates with the first ventilation hole 404 through the accommodation cavity 406.

[0037] A sliding table 408 is fixedly connected to the top end of the sampling box 402, and the first ventilation hole 404 penetrates through the sliding table 408; the sampling box 402 is slidably connected to the accommodation cavity 406 through the sliding table 408. A limiting edge is further provided on the inner wall of the bottom of the accommodation cavity 406 for limiting the sliding table 408 to prevent the sampling box 402 from falling off the accommodation cavity 406.

[0038] A slideway 409 is horizontally provided corresponding to the lower part of each accommodation cavity 406 on the base 401. A mudguard 403 is slidably connected inside the slideway 409. A return spring 407 is provided inside the slideway 409. Specifically, one end of the return spring 407 is connected to the inner wall of the slideway 409, and the other end is connected to one end of the mudguard 403.

[0039] One side of the bottom of the sampling box 402 is provided with a first slope 410. One side of the mudguard 403 close to the first slope 410 of the sampling box 402 is provided with a second slope 411 adapted to the first slope 410. Through the cooperation of the first slope 410 and the second slope 411, the sampling box 402 facilitates the mudguard 403 to block it.

[0040] Before the device enters the water, the sampling box 402 slides out of the accommodation cavity 406 due to its own gravity factor. At the same time, the mudguard 403 is placed inside the sampling box 402, and the return spring 407 is in a stretched state; when the device falls to the bottom of the water, the sampling box 402 is squeezed and slides into the accommodation cavity 406. The sampling box 402 covers the silt directly below it. At the same time, when the base 401 contacts the bottom of the water, the first slope 410 and the second slope 411 come into contact and cooperate. The mudguard 403 pushes the sampling box 402 to move upward under the action of the return spring 407. At the same time, the mudguard 403 blocks the bottom of the sampling box 402, and the bottom silt of the water is sealed in the sampling box 402. Due to the functions of the second ventilation hole 405 and the first ventilation hole 404, the gas and sewage existing in the accommodation cavity 406 and the sampling box 402 can be squeezed out by the silt.

[0041] In this embodiment, by setting the silt sampler, it is possible to sample the silt at the bottom of the pool while sampling the sewage, improving the sampling range of the device.

[0042] The above are only the preferred embodiments of the present invention that can be implemented, and do not limit the scope of rights of the present invention accordingly. All equivalent changes made by using the content of the specification and drawings of the present invention are included in the scope of rights of the present invention.

Claims

1. A medical sewage stratified sampling device, characterized in that: It includes a base. A first storage groove is provided at the center of the top of the base, and several second storage grooves are circumferentially provided around the first storage groove on the top of the base. An inspiration component is arranged inside the first storage groove, and a water body sampler is arranged inside each second storage groove. The water body sampler includes a sampling pipe and a water pumping component placed on the sampling pipe, and the bottom of the sampling pipe is connected to the inspiration component.

2. The medical sewage stratified sampling device according to claim 1, wherein: The inspiration component includes a rod body. An inspiration rope is arranged at the top of the rod body, and a frustum is arranged at the bottom of the rod body. A limiting cylinder is arranged at the bottom of the frustum. Strip-shaped holes are circumferentially spaced on the wall of the limiting cylinder, and the strip-shaped holes correspond to the second storage grooves one by one. A first magnet is arranged on the lower surface of the frustum, and the first magnet is placed inside the limiting cylinder. A convex platform is arranged at the center of the bottom of the first storage groove, and a second magnet that attracts the first magnet is arranged on the upper surface of the convex platform. An annular cavity is formed between the limiting cylinder and the convex platform after the limiting cylinder is inserted into the lower part of the first storage groove.

3. The medical sewage stratified sampling device according to claim 2, wherein: A rope hole is respectively provided inside the base corresponding to each second storage groove. The second storage groove communicates with the first storage groove through the rope hole. A limiting rope is respectively arranged in each rope hole. One end of the limiting rope is connected to the bottom of the water body sampler, and the end of the other end extends into the annular cavity through the strip-shaped hole, and a limiting ball is arranged at the extending end.

4. The medical sewage stratified sampling device according to claim 3, wherein: A limiting ball is arranged at one end of the limiting rope away from the sampling pipe. The diameter of the limiting ball is smaller than the inner diameter of the rope hole and larger than the width of the strip-shaped hole.

5. The medical sewage stratified sampling device according to claim 3, wherein: The water pumping component includes a lower cover, an upper cover and a piston. The sampling pipe is a structure that is penetrated up and down. The lower cover is placed at the bottom of the sampling pipe, and the limiting rope is fixedly connected to the bottom of the lower cover. The piston is placed inside the sampling pipe. A first pulling rope is arranged at the bottom of the piston. The end of the first pulling rope away from the piston penetrates through the lower cover and is connected to the bottom of the second storage groove. The upper cover is placed at the top of the sampling pipe, and a water inlet hole is provided on the upper cover. Floating balls are arranged around the outer circumference of the upper cover.

6. The medical sewage stratified sampling device according to claim 5, characterized in that: The water body sampler further includes a sealing component. The sealing component includes a blocking block, a hook and a sliding rod. The hook is placed at the lower part of the sliding rod and is fixedly connected to the sliding rod. First sliding grooves are respectively provided at both ends of the lower cover. The upper part of the sliding rod penetrates through the first sliding groove and extends into the sampling pipe, and the sliding rod is slidably connected to the first sliding groove. The hook is placed below the lower cover. Second sliding grooves are respectively provided at both ends of the upper cover. A blocking block is slidably arranged in each second sliding groove. Second pulling ropes are respectively arranged on the opposite sides of the two blocking blocks. The second pulling ropes are connected to the hook through the rope loops arranged at their ends. One end of each blocking block provided with a second pulling rope is also respectively connected to the inner wall of the second sliding groove where it is located through a telescopic spring.

7. The medical sewage stratified sampling device according to claim 6, characterized in that: A limiting block is respectively arranged at the bottom of each first sliding groove, and the limiting block is placed outside the hook.

8. The medical sewage stratified sampling device according to claim 1, characterized in that: A silt sampler is arranged at the bottom of the base. The silt sampler includes a sampling box and a base. The base is placed at the bottom of the base and is fixedly connected to the base. A receiving cavity is provided on the lower end surface of the base. The sampling box is placed in the receiving cavity and is slidably connected to the receiving cavity. A sliding track is provided at the lower part of the base corresponding to the receiving cavity. A mud blocking plate is slidably connected inside the sliding track. A return spring is arranged inside the sliding track. One end of the return spring is connected to the inner wall of the sliding track, and the other end is connected to the sliding plate.

9. The medical sewage stratified sampling device according to claim 8, wherein: The top of the sampling box is provided with a first ventilation hole, and the inner cavity of the sampling box is communicated with the accommodation cavity through the first ventilation hole. The base is provided with a second ventilation hole corresponding to the top of the accommodation cavity.

10. The medical sewage stratified sampling device according to claim 8, wherein: The bottom of the sampling box is provided with a first slope; one side of the fender close to the sampling box is provided with a second slope adapted to the first slope.

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