Water sample extraction device for water quality detection

Abstract

The invention provides a water sample extraction device for water quality detection, and belongs to the technical field of sampling. Comprising a sampling rod, one end of the sampling rod is fixedly provided with a sampling frame, the inner wall of the sampling frame is provided with a water sample extraction device for extracting a water sample in water, the water sample extraction device comprises sampling chambers which are sequentially fixed on the inner wall of the sampling frame, each sampling chamber is provided with a water inlet end and a water outlet end, and screw rods are rotatably arranged on the surfaces of the multiple sampling chambers; the screw rod is in threaded connection with a threaded sleeve, and a limiting rod is fixed on the surface of the sampling chamber; by arranging the water sample extraction device, an operator can extract water samples at different depths such as the surface, the middle layer and the bottom layer according to needs, so that water sample collection is more targeted, different detection requirements are met, the water samples can be filtered in advance in the sampling process, the steps and difficulty of inspection in a laboratory after sampling are reduced, and the detection efficiency is improved. The detection efficiency is improved, meanwhile, damage of impurities to detection equipment is reduced, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of sampling, and in particular to a water sample extraction device for water quality detection. Background Art

[0002] In the process of water quality testing, accurately obtaining water samples at different depths is crucial for a comprehensive assessment of the water quality. Existing water sample extraction devices often have problems such as inconvenient operation, inability to accurately extract water samples at different depths, and incomplete water sample filtration and processing. For example, some devices are difficult to accurately control the sampling depth, resulting in the water samples taken not being able to accurately reflect the water quality conditions at a specific depth; some devices are prone to mixing impurities during the sampling process, affecting the accuracy of the test results. Therefore, the present application provides a water sample extraction device for water quality testing to meet the needs. Therefore, the present application provides a water sample extraction device for water quality testing to meet the needs. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a water sample extraction device for water quality testing to solve the problems that existing water sample extraction devices are often inconvenient to operate, cannot accurately extract water samples of different depths, and have imperfect water sample filtering and processing.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: A water sample extraction device for water quality detection comprises a sampling rod, one end of which is fixed with a sampling frame, the inner wall of the sampling frame is installed with a water sample extraction device for extracting water samples from water quality, the water sample extraction device comprises sampling chambers fixed to the inner wall of the sampling frame in sequence, the sampling chambers have a water inlet end and a water outlet end, a screw is rotatably arranged on the surface of a plurality of sampling chambers, a threaded sleeve is threadedly connected to the screw, and a limiting rod is fixed on the surface of the sampling chamber, the limiting rod is slidably connected with the threaded sleeve, an opening and closing plate is fixed at the bottom of the threaded sleeve, and the opening and closing plate can slide on the inner wall of the water inlet end; The driving mechanism is arranged on the inner wall of the sampling rod, including a slidable sliding plate and a supporting plate fixed on the inner wall of the sampling rod, a first spring is fixed on the supporting plate, the first spring is fixed to the sliding plate, a slidable sliding rod is also arranged on the supporting plate, a sleeve is fixed on the outer wall of the sliding rod, a long strip is fixed on the sleeve, a second spring that fits the long strip is fixed on the inner wall of the sampling rod, a driven gear is fixed on the outer wall of the screw rod, a driving gear is fixed on one end of the sliding rod, and the driving gear is meshed with the driving gear, a turntable is fixed on the other end of the sliding rod, a filter screen is arranged on one side of the sampling frame, a drain outlet is arranged on the other side, a counterweight block groove is arranged near the drain outlet, the counterweight block can slide in the groove, and an axle pin on the top of the sampling frame passes through the frame and the counterweight block and is rotatably connected to the inner walls of the two.

[0005] Preferably, a cleaning component for cleaning the filter is also installed on the top of the sampling frame, and the cleaning component includes a rotating rod, which is rotatably arranged on the top of the sampling frame, and a plurality of impellers are fixedly arranged on the outer wall of the rotating rod, and a bidirectional screw is rotatably arranged on a side of the sampling frame close to the filter, and both ends of the bidirectional screw are threadedly connected with sliding members through threaded holes, and a brush is fixedly arranged on the side of the sliding member close to the filter, and the brush contacts the filter, and a slide rail is fixedly arranged on the side of the sampling frame close to the filter, and the sliding member is slidably connected to the outer wall of the slide rail, and a driving bevel gear is fixedly arranged on one end of the rotating rod close to the sliding member, and a driven bevel gear is fixedly arranged on one end of the bidirectional screw close to the driving bevel gear, and the driving bevel gear is meshingly connected with the driven bevel gear.

[0006] Preferably, a plurality of convex points are fixedly provided at equal intervals on a side of the sampling frame close to the filter screen, a plurality of grooves are opened at equal intervals on a side of the sliding member close to the convex points, and the convex points are in extrusion contact with the grooves.

[0007] Preferably, a rubber pad is provided on the surface of the protrusion, and an anti-slip pattern is provided on the surface of the rubber pad.

[0008] Preferably, the first spring and the second spring are both made of stainless steel, and the surfaces of the springs are provided with an anti-corrosion coating.

[0009] Preferably, the outer side wall of the turntable is provided with anti-slip grooves at equal intervals.

[0010] Preferably, a bracket is fixedly provided on the outer side wall of the sampling rod.

[0011] Preferably, the bristles of the brush are arranged in a wave shape, and the intervals between adjacent bristles are different.

[0012] Preferably, the blades of the impeller are of an arc-shaped structure, and the surface of the blades is coated with a hydrophobic coating.

[0013] Preferably, a gear table is provided on the outer side wall of the sampling rod, and the gears marked by the gear table are sequentially divided into a surface layer, a middle layer and a bottom layer.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: In the above scheme, by setting up a water sample extraction device, the operator can extract water samples at different depths such as the surface, middle layer and bottom layer according to the needs, so that the water sample collection is more targeted and meets different detection needs. In addition, the water samples can be pre-filtered during the sampling process, which reduces the steps and difficulty of testing in the laboratory after sampling, improves the detection efficiency, and at the same time reduces the damage of impurities to the detection equipment and extends the service life of the equipment. The bracket fixed on the outer wall of the sampling rod makes it easy for operators to take the entire device, reducing the operating burden and improving the convenience of operation; The counterweight block can slide in the counterweight block slot and is rotatably connected to the sampling frame through an axle pin. Under the impact of water flow, the counterweight block can rotate to adjust its own position, buffer the impact of water flow, keep the device in a more stable state in the water, reduce the sampling error caused by the shaking of the device, and ensure the accuracy of sampling; The present invention provides a cleaning component, which does not require manual operation. When the extraction device is placed in a water source for sampling or pulled out of a water source, the water flow drives the impeller to rotate, thereby driving the entire cleaning component to work, thereby realizing automatic cleaning of the filter screen, saving manpower and time costs, and improving the convenience of operation. The brush makes reciprocating motion on the surface of the filter, which can fully scrub the filter. The impurities brushed off can be washed away in time with the water flow to avoid impurities remaining. At the same time, the contact between the grooves and convex points on the sliding part makes the filter vibrate, which further assists the brush cleaning and can deeply remove the stubborn impurities on the filter, making the filter clean more thoroughly and ensuring a good filtering effect. Each time the extraction device is used for sampling, whether it is put in or taken out, the filter can be cleaned, realizing real-time maintenance of the filter, ensuring that it is in a clean state each time it is used, extending the service life of the filter, and ensuring the purity of subsequent water sample extraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the water sample extraction device for water quality detection of the present invention; Figure 2 It is a schematic diagram of another viewing angle of the water sample extraction device for water quality testing of the present invention; Figure 3 It is a schematic diagram of the sampling rod and the bracket of the present invention; Figure 4 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 5 It is a schematic diagram of the sampling rod, the sliding rod and the rotating disk of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of point B in the middle; Figure 7 It is a schematic diagram of the sampling rod, the sliding plate and the collar of the present invention; Figure 8 This is a schematic diagram of the slide bar, the long strip and the second spring of the present invention; Fig. 9 It is a schematic diagram of the slide bar, driving gear and driven gear of the present invention; Fig.10 It is a schematic diagram of the sampling frame, water outlet and drain port of the present invention; Fig.11It is a schematic diagram of the sampling rod, sampling frame and counterweight block of the present invention; Fig.12 For the present invention Fig.11 Enlarged view of point C in the middle.

[0016] 1. Sampling rod; 2. Sampling frame; 3. Water sample extraction device; 301. Sampling chamber; 302. Water inlet end; 303. Water outlet end; 304. Screw; 305. Threaded sleeve; 306. Limit rod; 307. Opening and closing plate; 308. Sliding plate; 309. Support plate; 310. First spring; 311. Sliding rod; 312. Ring; 313. Strip; 314. Second spring; 315. Driven gear; 316. Driving gear; 317. Turntable; 318 , filter; 319, drain outlet; 320, counterweight slot; 321, counterweight; 322, shaft pin; 4, cleaning parts; 401, rotating rod; 402, impeller; 403, bidirectional screw; 404, sliding part; 405, brush; 406, slide rail; 407, driving bevel gear; 408, driven bevel gear; 409, protrusion; 410, groove; 5, anti-slip pattern; 6, bracket; 7, gear table; 701, surface layer; 702, middle layer; 703, bottom layer.

[0017] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0018] The following is a detailed description of a water sample extraction device for water quality detection provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0019] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0020] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0021] like Figure 1-Figure 9 As shown, an embodiment of the present invention provides a water sample extraction device for water quality detection, including a sampling rod 1, one end of the sampling rod 1 is fixedly connected to a sampling frame 2, a water sample extraction device 3 is installed on the inner wall of the sampling frame 2, and includes sampling chambers 301 fixed to the inner wall of the sampling frame 2 in sequence, the sampling chamber 301 has a water inlet end 302 and a water outlet end 303, the water sample enters the sampling chamber 301 through the water inlet end 302, and a screw 304 is rotatably arranged on the surface of the plurality of sampling chambers 301 , a threaded sleeve 305 is threadedly connected to the screw rod 304, and a limit rod 306 is fixed on the surface of the sampling chamber 301. The limit rod 306 is slidably connected to the threaded sleeve 305. An opening and closing plate 307 is fixed to the bottom of the threaded sleeve 305. The opening and closing plate 307 can slide on the inner wall of the water inlet end 302. By rotating the screw rod 304, the threaded sleeve 305 is driven to move along the screw rod 304, thereby controlling the opening and closing of the opening and closing plate 307, thereby realizing the control of the water sample entering the sampling chamber 301; like Figure 1-Figure 8 As shown, the driving mechanism is arranged on the inner wall of the sampling rod 1, including a slidable sliding plate 308, and a supporting plate 309 fixed to the inner wall of the sampling rod 1, a first spring 310 is fixed on the supporting plate 309, the first spring 310 is connected to the sliding plate 308, a slidable sliding rod 311 is also arranged on the supporting plate 309, a collar 312 is fixed on the outer wall of the sliding rod 311, a strip 313 is fixed on the collar 312, a second spring 314 which is in contact with the strip 313 is fixed on the inner wall of the sampling rod 1, a driven gear 315 is fixed on the outer wall of the screw rod 304, and the sliding rod 311 is provided with a plurality of springs 314, ... A driving gear 316 is fixed at one end of the slide bar 311, and the driving gear 316 is meshed with the driven gear 315. A turntable 317 is fixed at the other end of the slide bar 311. The outer wall of the turntable 317 is equidistantly provided with anti-slip grooves 5 to increase the friction between the hand and the turntable 317, so that the operator can easily rotate the turntable 317. When the operator rotates the turntable 317, the slide bar 311 is driven to rotate, and the driving gear 316 on the slide bar 311 drives the driven gear 315 on the screw rod 304 to rotate, thereby realizing the control of the screw rod 304, and then controlling the movement of the opening and closing plate 307. like Figure 1-Figure 12As shown, a filter screen 318 is provided on one side of the sampling frame 2 for preliminary filtering of the water sample entering the sampling frame 2 to remove larger impurities, and a drain port 319 is provided on the other side. A counterweight groove 320 is provided near the drain port 319, and the counterweight 321 can slide in the groove. The shaft pin 322 on the top of the sampling frame 2 passes through the frame and the counterweight 321 and is rotatably connected to the inner walls of the two. By adjusting the position of the counterweight 321 in the counterweight groove 320, the center of gravity of the sampling frame 2 can be adjusted to keep it stable in the water, so as to facilitate accurate sampling; like Figure 1-Figure 2 As shown, a bracket 6 is fixedly provided on the outer wall of the sampling rod 1, which is used to facilitate the operator to take the entire device and improve the convenience of operation. A gear table 7 is provided on the outer wall of the sampling rod 1. The gears marked by the gear table 7 are sequentially divided into a surface layer 701, a middle layer 702 and a bottom layer 703, which are used to indicate the position of the water sample extraction device 3 for extracting water samples at different depths. The operator can accurately control the sampling device to extract water samples at different depths by observing the gear table 7 as needed; When the user needs to take samples according to different depths of the water source, the specific operation process is as follows: if the water sample on the surface of the water source is to be sampled, first insert the extraction device into the surface of the water source. At this time, the bracket 6 can be held by one hand and the turntable 317 can be held by the other hand. Then, the turntable 317 is pressed to make the slide bar 311 slide downward along the inner wall of the support plate 309. When the slide bar 311 slides downward, the collar 312 will slide downward together. When the collar 312 slides downward and contacts the sliding plate 308, the sliding plate 308 will slide downward along the inner wall of the sampling rod 1. When the sliding plate 308 slides downward, the first spring 310 is compressed. When the sliding plate 308 is observed on the sampling rod 1, the first spring 310 is compressed. When the first gear 8 is slid to the first gear position marked as the water source surface, the turntable 317 is rotated counterclockwise. At this time, the slide rod 311 rotates to drive the ring 312 to rotate. When the ring 312 rotates, it drives the strip 313 to squeeze the second spring 314. As the turntable 317 continues to rotate, the slide rod 311 drives the driving gear 316 to turn the driven gear 315. The driven gear 315 rotates to rotate the screw rod 304. The rotation of the screw rod 304 drives the threaded sleeve 305 to slide upward. When the threaded sleeve 305 slides upward, it drives the opening and closing plate 307 to slide out from the inner wall of the water inlet end 302, thereby opening the water inlet end 302, so that the water sample on the water source surface can smoothly enter the sampling chamber 301 on the surface. After the water sample collection on the surface of the water source is completed, the rotating turntable 317 is first released. At this time, under the reset action of the second spring 314, the long strip 313 is pushed to reset, thereby driving the slide bar 311 and the ring 312 to reset. When the slide bar 311 rotates and resets, the driving gear 316 will again shift the driven gear 315 to reset, so that the screw rod 304 is reset, and the opening and closing plate 307 on the sleeve is reset, thereby closing the water inlet end 302, effectively preventing the water in the water source from contacting the sampling chamber 301. The water samples collected in the water source are mixed with each other. Then, the turntable 317 is completely released to release the pressure on the turntable 317. At this time, the first spring 310 is reset, pushing the sliding plate 308 to reset. When the sliding plate 308 is reset, it will push the ring 312 to drive the sliding rod 311 to reset, so that the sliding plate 308 is re-pointed to the first gear position marked as the surface layer 701 of the water source. If it is necessary to collect water samples from the middle layer 702 or the bottom layer 703 of the water source, the operating principle is the same as the above-mentioned process of collecting water samples from the surface layer 701 of the water source; After the sampling of the water source is completed, the entire device is taken out from the water source, and the water outlet 303 on one side of the sampling chamber 301 is opened, and the water sample collected in the sampling chamber 301 is taken out and sent to the detection equipment for detection; Before the water sample enters the sampling chamber 301, it will first be filtered through the filter 318. The filter 318 can filter out larger impurities in the water sample in advance, significantly reducing the steps and difficulty of testing in the laboratory after sampling, and improving the detection efficiency. When the extraction device is immersed in the water source, the water flow may have an impact on the device. At this time, the counterweight block 321 placed in the water can increase the weight of the extraction device, effectively reducing the impact of the device caused by the excessively fast water flow. In addition, since the counterweight block 321 and the shaft pin 322 are connected in a rotating manner, when the water flows through the filter 318 into the sampling frame 2 and is discharged through the drain port 319, it enters the filter The water flow of 318 pushes the counterweight 321, and the counterweight 321 can rotate along the shaft pin 322 according to the water flow speed. The counterweight 321 can rotate slightly when impacted by the water flow in the sampling frame 2, which has many advantages: on the one hand, the rotation of the counterweight 321 can buffer the impact force of the water flow on the device to a certain extent, so that the device can maintain a more stable state in the water and ensure the accuracy of sampling; on the other hand, the rotation of the counterweight 321 can promote the water flow to be more evenly distributed in the sampling frame 2, thereby improving the sampling efficiency; in addition, it can also reduce the local pressure of the water flow on the filter 318, extend the service life of the filter 318, and reduce the maintenance cost of the device.

[0022] It should be noted that, due to the limiting effect of the second spring 314 and the fact that the second spring 314 is an arc-shaped spring, the slide bar 311 can mesh with the driven gear 315 when it slides up and down with the driving gear 316. Each time the slide bar 311 is rotated and then released, the second spring 314 can reset the slide bar 311 with the driving gear 316 and restore it to the position where it can mesh with the driven gear 315 when sliding up and down, thereby ensuring the stable operation and reliable operation of the drive mechanism.

[0023] like Figure 1-Figure 6 As shown, a cleaning component 4 for cleaning the filter screen 318 is also installed on the top of the sampling frame 2. The cleaning component 4 includes a rotating rod 401, which is rotatably arranged on the top of the sampling frame 2. A plurality of impellers 402 are fixedly arranged on the outer wall thereof. The blades of the impeller 402 are designed with an arc structure. This design can better adapt to the flow direction of the water flow, increase the contact area between the blades and the water flow, thereby improving the rotation efficiency of the impeller 402 under the action of the water flow. At the same time, the surface of the blade is coated with a hydrophobic coating, which can effectively reduce the adhesion of water on the blade surface, reduce the resistance of the water flow to the blade, and further enhance the rotation performance of the impeller 402. When the water flows through the impeller 402, the impeller 402 can rotate faster and more stably, providing sufficient power for subsequent cleaning work. like Figure 1-Figure 12 As shown, a bidirectional screw 403 is rotatably provided on one side of the sampling frame 2 close to the filter screen 318, and both ends of the bidirectional screw 403 are respectively threadedly connected with a sliding member 404 through threaded holes, and the sliding member 404 is slidably connected to the outer wall of a slide rail 406 fixedly provided on one side of the sampling frame 2 close to the filter screen 318, so as to ensure that the sliding member 404 can stably slide along the slide rail 406, and when the bidirectional screw 403 rotates, it can drive the sliding member 404 to do reciprocating motion on the slide rail 406; like Figure 1-Figure 12 As shown, a brush 405 is fixedly arranged on one side of the sliding member 404 close to the filter 318. The bristles of the brush 405 are arranged in a wave shape, and the spacing between adjacent bristles is different. This unique arrangement can more effectively remove impurities of different sizes and shapes on the filter 318. For larger impurities, the bristles with longer spacing can easily hook them out; for smaller impurities, the bristles with shorter spacing can extend into the gap of the filter 318 to clean them out. At the same time, the brush 405 is in close contact with the filter 318, which can give full play to its cleaning function and ensure the cleanliness of the filter 318. like Figure 1-Figure 12As shown, a driving bevel gear 407 is fixedly provided at one end of the rotating rod 401 close to the sliding member 404, and a driven bevel gear 408 is fixedly provided at one end of the bidirectional screw 403 close to the driving gear 316, and the driving bevel gear 407 is meshedly connected with the driven bevel gear 408. When the impeller 402 drives the rotating rod 401 to rotate, the rotating rod 401 transmits power to the bidirectional screw 403 through the meshing of the driving bevel gear 407 and the driven bevel gear 408, so that the bidirectional screw 403 rotates, thereby driving the sliding member 404 and the brush 405 to clean the filter screen 318; like Figure 1-Figure 12 As shown, a plurality of protrusions 409 are fixedly arranged at equal intervals on one side of the sampling frame 2 close to the filter screen 318, a rubber pad is arranged on the surface of the protrusion 409, and an anti-skid pattern 5 is arranged on the surface of the rubber pad. A plurality of grooves 410 are arranged at equal intervals on one side of the sliding member 404 close to the protrusion 409. The protrusions 409 are in squeeze contact with the grooves 410, which can provide greater friction when the sliding member 404 slides to a specific position, so that the sliding member 404 is fixed on the slide rail 406 more stably, and the brush 405 is prevented from shaking during the cleaning process, thereby ensuring the reliability of the cleaning effect. At the same time, the setting of the rubber pad and the anti-skid pattern 5 can also reduce the wear between the protrusion 409 and the groove 410, thereby extending the service life of the device.

[0024] When the extraction device is placed in a water source for sampling, or when the sampling is completed and the extraction device is pulled out of the water source, the impeller 402 contacts the water flow, and the water flow drives the impeller 402 to rotate. The rotation of the impeller 402 drives the rotating rod 401 to rotate, and the rotating rod 401 further drives the driving bevel gear 407 to rotate. The rotation of the driving bevel gear 407 drives the driven bevel gear 408 to rotate, and the driven bevel gear 408 drives the bidirectional screw 403 to rotate. The rotation of the bidirectional screw 403 causes the two sliding members 404 to drive the brush 405 to reciprocate on the surface of the filter 318. During the reciprocating brushing of the brush 405, the impurities brushed off the filter 318 by the brush 405 can be washed away in conjunction with the water flow when the extraction device enters or exits the water. Moreover, when the sliding member 404 slides back and forth, the groove 410 thereon will be squeezed and contacted with the protrusion 409. With each slide, the protrusion 409 and the groove 410 will contact, and each contact will cause the filter 318 to vibrate. This vibration assists the brush 405 in cleaning the filter 318, and can clean the filter 318 more thoroughly. In this way, the extraction device can clean the filter 318 each time it enters the water source to take a sample or is pulled out of the water after taking a sample, ensuring that the filter 318 remains clean each time it is used, effectively improving the filtering effect and the practicality of the device.

[0025] like Figure 7-Figure 8As shown, the first spring 310 and the second spring 314 are both made of stainless steel, and the surfaces of the first spring 310 and the second spring 314 are provided with an anti-corrosion coating to adapt to the use of the water sample extraction device 3 in different water quality environments and prevent the springs from rusting and being damaged.

[0026] The present invention encompasses any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A water sample extraction device for water quality detection, characterized in that: include: A sampling rod (1) is fixed with a sampling frame (2) at one end, and a water sample extraction device (3) for extracting water samples from water is installed on the inner wall of the sampling frame (2). The water sample extraction device (3) comprises sampling chambers (301) fixed to the inner wall of the sampling frame (2) in sequence, and the sampling chambers (301) have a water inlet end (302) and a water outlet end (303). Screws (304) are rotatably arranged on the surface of the plurality of sampling chambers (301), and a threaded sleeve (305) is threadedly connected to the screw (304). A limiting rod (306) is fixed on the surface of the sampling chamber (301), and the limiting rod (306) is slidably connected to the threaded sleeve (305). An opening and closing plate (307) is fixed to the bottom of the threaded sleeve (305), and the opening and closing plate (307) can slide on the inner wall of the water inlet end (302); The driving mechanism is arranged on the inner wall of the sampling rod (1), comprising a slidable sliding plate (308) and a supporting plate (309) fixed on the inner wall of the sampling rod (1), a first spring (310) being fixed on the supporting plate (309), the first spring (310) being fixed to the sliding plate (308), a slidable sliding rod (311) being further arranged on the supporting plate (309), a collar (312) being fixed on the outer wall of the sliding rod (311), a strip (313) being fixed on the collar (312), and a second spring (314) being in contact with the strip (313) being fixed on the inner wall of the sampling rod (1). A driven gear (315) is fixedly provided on the outer wall of the screw rod (304), a driving gear (316) is fixedly provided on one end of the slide rod (311), and the driving gear (316) is meshed with the driving gear (316), and a rotating disk (317) is fixedly provided on the other end of the slide rod (311), a filter screen (318) is provided on one side of the sampling frame (2), and a drain outlet (319) is provided on the other side, and a counterweight groove (320) is provided near the drain outlet (319), and the counterweight (321) can slide in the groove, and an axle pin (322) at the top of the sampling frame (2) passes through the frame and the counterweight (321) and is rotatably connected to the inner walls of the two.

2. The water sample extraction device for water quality detection according to claim 1, characterized in that: A cleaning component (4) for cleaning the filter screen (318) is also installed on the top of the sampling frame (2). The cleaning component (4) comprises a rotating rod (401). The rotating rod (401) is rotatably arranged on the top of the sampling frame (2). A plurality of impellers (402) are fixedly arranged on the outer wall of the rotating rod (401). A bidirectional screw rod (403) is rotatably arranged on one side of the sampling frame (2) close to the filter screen (318). Both ends of the bidirectional screw rod (403) are respectively threadedly connected to sliding members (404) through threaded holes. The sliding member (404) is close to the filter screen (318). A brush (405) is fixedly provided on one side of the sampling frame (2), the brush (405) is in contact with the filter screen (318), a slide rail (406) is fixedly provided on one side of the sampling frame (2) close to the filter screen (318), the sliding member (404) is slidably connected to the outer wall of the slide rail (406), a driving bevel gear (407) is fixedly provided on one end of the rotating rod (401) close to the sliding member (404), a driven bevel gear (408) is fixedly provided on one end of the bidirectional screw (403) close to the driving bevel gear (407), and the driving bevel gear (407) is meshingly connected with the driven bevel gear (408).

3. The water sample extraction device for water quality detection according to claim 2, characterized in that: A plurality of convex points (409) are fixedly arranged at equal intervals on one side of the sampling frame (2) close to the filter screen (318), and a plurality of concave grooves (410) are opened at equal intervals on one side of the sliding member (404) close to the convex points (409), and the convex points (409) are in extrusion contact with the concave grooves (410).

4. The water sample extraction device for water quality detection according to claim 3 is characterized in that: The surface of the protrusion (409) is provided with a rubber pad, and the surface of the rubber pad is provided with anti-slip grooves (5).

5. The water sample extraction device for water quality detection according to claim 1, characterized in that: The first spring (310) and the second spring (314) are both made of stainless steel, and the surfaces of the springs are provided with an anti-corrosion coating.

6. The water sample extraction device for water quality detection according to claim 1, characterized in that: The outer side wall of the rotating disk (317) is provided with anti-slip grooves (5) at equal intervals.

7. The water sample extraction device for water quality detection according to claim 1, characterized in that: A bracket (6) is fixedly provided on the outer side wall of the sampling rod (1).

8. The water sample extraction device for water quality detection according to claim 2, characterized in that: The bristles of the brush (405) are arranged in a wave shape, and the spacing between adjacent bristles is different.

9. The water sample extraction device for water quality detection according to claim 2, characterized in that: The blades of the impeller (402) are of an arc-shaped structure, and the surface of the blades is coated with a hydrophobic coating.

10. The water sample extraction device for water quality detection according to claim 1, characterized in that: A gear table (7) is provided on the outer side wall of the sampling rod (1), and the gears marked on the gear table (7) are sequentially divided into a surface layer (701), a middle layer (702) and a bottom layer (703).

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