Anti-corrosion handheld equipment for sampling shallow lakes

Abstract

The utility model discloses anti-corrosion handheld equipment for sampling shallow lakes, which belongs to the technical field of sampling equipment and comprises a sleeve shell with a conical lower end, a collecting bottle and a sliding cover plate are arranged in an inner mounting groove of the sleeve shell, and the cover plate is vertically opened and closed through six groups of connecting components comprising reset springs and double sleeves. The upper end of the sleeve shell is connected with a multi-stage sleeve through a fixing block, and a top end adjusting handle is linked with an adjusting rope through a V-shaped adjusting plate to control opening and closing of the cover plate. The collection bottle and the cover plate form a dynamic sealing structure by adopting triangular bulges and staggered rubber rings, so that sample leakage is effectively prevented. Spring hoops are arranged on the two sides of the sleeve shell to achieve rapid disassembly and assembly of the collecting bottle, and the curved surface water inlet is provided with a replaceable 40 / 80 / 120-mesh filter screen. According to the utility model, the length adjustment of 0.8-2.5 m is realized through the threaded splicing of the five-stage sleeves, the opening and closing precision of the cover plate is within + / -1.5 mm due to the lever design of the regulation and control plate, and the device has the advantages of corrosion resistance, high sealing performance and modular operation, and is suitable for the multi-stage water quality sampling of shallow lakes.

Description

Technical Field

[0001] This utility model belongs to the field of sampling equipment technology, specifically relating to a corrosion-resistant handheld device for sampling shallow lakes. Background Technology

[0002] Shallow lakes, as important wetland ecosystems, require precise water sample acquisition at different depths for water quality monitoring. Traditional handheld sampling devices often employ a cylindrical structure, which suffers from high water resistance and low positioning accuracy. Furthermore, their sealing structures often rely on a single rubber gasket, making them prone to leakage under dynamic water pressure, leading to sample contamination. Existing adjustable sampling devices mostly achieve extension through sleeve splicing, but the threaded connections are susceptible to water corrosion, posing a risk of thread seizing over long-term use. In addition, the sampling bottle fixing mechanism generally uses bolt fastening, requiring tools for replacement, which is inefficient in field operations. While filtration devices for different particle sizes are available on the market, filter replacement requires complete disassembly of the device, which is cumbersome and prone to introducing secondary contamination.

[0003] Current shallow water sampling equipment mostly uses stainless steel for corrosion resistance, but it still faces the risk of pitting corrosion in high-chloride water bodies, and lacks a dynamic sealing design for the junction of the sampling port and the bottle. For stratified sampling requirements, existing adjustment mechanisms often suffer from insufficient stroke accuracy and are laborious to operate, making it difficult to achieve precise control at a depth of 0.5 meters.

[0004] Therefore, there is a need for a corrosion-resistant handheld device for sampling shallow lakes. Through structural innovation and material optimization, the reliability, ease of operation, and environmental adaptability of the sampling device can be comprehensively improved, filling the technological gap in refined sampling of shallow lakes. Utility Model Content

[0005] The purpose of this invention is to provide a corrosion-resistant handheld device for sampling shallow lakes, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a corrosion-resistant handheld device for sampling shallow lakes, comprising a casing, the lower end of which is conical, and an installation groove inside the casing. One side of the curved surface of the installation groove extends through one side of the casing, and a collection bottle is installed inside the installation groove. A cover plate is slidably connected to the inner surface of the upper end of the installation groove. The upper edge of the cover plate is fixedly connected to the upper end of the installation groove via a connecting component. A fixing block is fixedly connected to the upper end of the casing. The fixing block is conical, and a first threaded head is provided at the upper end of the fixing block. Several sleeves are threadedly connected to the first threaded head. An adjustment handle is threadedly connected to the upper end of the uppermost sleeve, and a connecting hole is provided inside the sleeve. An adjustment rope is provided inside the connecting hole, and both ends of the adjustment rope are fixedly connected to the upper end of the cover plate or inside the adjustment handle, respectively.

[0007] It should be noted in the solution that connecting blocks are fixedly connected to both sides of the curved surface of the casing, and a hoop is hinged to one side of each connecting block. The other end of the hoop can be fitted and snapped onto the connecting block on the other side. The hoop is a spring rope.

[0008] It is worth noting that the lower end of the collection bottle is provided with a discharge port, and the upper end of the inner curved surface of the collection bottle is fixedly connected with a first protrusion with a triangular cross-section. Several first rubber rings are fixedly connected to the inclined surface of the first protrusion, and the lower edge of the cover plate is fixedly connected with a second protrusion with a triangular cross-section. Several second rubber rings are fixedly connected to the inclined surface of the second protrusion. The first rubber rings and the second rubber rings can be alternately slidably connected.

[0009] Furthermore, it should be noted that there are six connecting components arranged in a ring, and each connecting component includes a return spring. A first fixing tube and a second fixing tube are slidably connected inside the return spring. The lower end of the second fixing tube is fixedly connected to a sliding block. The sliding block is slidably connected inside the first fixing tube. The upper ends of the first fixing tube and the return spring are both fixedly connected to the upper end of the mounting groove, and the lower ends of the second fixing tube and the return spring are both fixedly connected to the upper end of the cover plate.

[0010] In a preferred embodiment, the number of sleeves is five, the length is 0.2-0.5mm, and each sleeve has a second threaded head fixedly connected to its upper end, and each sleeve has a first threaded hole at its lower end.

[0011] In a preferred embodiment, the lower end of the control handle is provided with a second threaded hole, which can be threaded to a second threaded head. The control handle is provided with a groove in the middle of one side, and a fixed handle is fixedly connected to the lower end of the control handle in the groove. The upper end of the fixed handle is axially connected to the trough of the "V"-shaped control plate through a rotating shaft. The other end of the control plate is slidably connected to both sides of the groove, and the upper end of the adjustment rope is fixedly connected to the lower end of the control plate in the groove.

[0012] In a preferred embodiment, a water inlet is provided at the upper end of one side of the curved surface of the casing, and a replaceable filter screen is installed on the outer surface of the water inlet. The filter screen includes three different pore sizes: 40 mesh, 80 mesh, and 120 mesh.

[0013] Compared with the prior art, the corrosion-resistant handheld device for sampling shallow lakes provided by this utility model has at least the following beneficial effects:

[0014] (1) This utility model achieves the integration and efficient sealing of shallow water sampling equipment through the nested structure design of the casing and collection bottle, combined with the linkage mechanism of the cover plate and connecting components. The conical structure at the lower end of the casing effectively reduces water resistance, and the through-surface design of the mounting groove ensures accurate sampling positioning. The composite fixed tube assembly with six sets of reset springs enables the cover plate to have an automatic reset function. Combined with the staggered sealing structure of the first / second protrusion and the rubber ring, a double dynamic sealing interface is formed during the sampling process to ensure the sealing reliability under different water pressure levels. The combination of the detachable casing assembly and the adjusting rope enables multi-level adjustment of the sampling depth. The control handle precisely controls the opening and closing angle of the cover plate through the V-shaped plate lever principle, and the operator can complete the layered sampling within the depth range of 0.5-2.5 meters with one hand. The hinged spring hoop design on the side of the casing enables quick replacement and anti-drop of the collection bottle. Combined with the replaceable filter module, it can meet the sampling needs of multiple indicators such as microorganisms and suspended solids.

[0015] (2) This equipment innovatively adopts a modular combination structure, achieving telescopic adjustment of the sampling device through five-stage detachable sleeves. Each sleeve is equipped with a precision threaded connection structure, ensuring overall torsional strength while reducing the volume of the equipment by 60% after shrinkage. A specially designed dynamic sealing system, using a triangular raised flow guide structure and a three-stage rubber ring staggered seal, effectively resists water fluctuation pressure, maintaining 97% sealing efficiency even at a flow rate of 1.5 m / s. The control handle integrates a grooved guide rail and a V-shaped control plate forming a miniature winch system, achieving ±5° precision control of the cover opening and closing. Combined with the modular option of tungsten steel counterweights, it ensures the sampling bottle's sinking posture maintains a vertical error of ≤3°. A replaceable multi-mesh filter assembly, working with a spring connection mechanism, allows for quick filter replacement without disassembling the casing, significantly improving operational efficiency. The entire equipment is constructed of 316L stainless steel and PTFE composite material, and has been verified through salt spray testing to operate continuously for 2000 hours in an environment with pH 3-11 without corrosion. Attached Figure Description

[0016] Figure 1 This is a front structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the filter structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the control handle structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the cover plate and collection bottle structure of this utility model.

[0020] In the diagram: 1. Housing; 101. Mounting groove; 102. Connecting block; 103. Water inlet; 2. Collection bottle; 201. First protrusion; 202. First rubber ring; 203. Discharge port; 3. Connecting assembly; 301. Return spring; 302. First fixing tube; 303. Sliding block; 304. Second fixing tube; 4. Cover plate; 401. Second protrusion; 402. Second rubber ring; 5. Hoop; 6. Fixing block; 601. First threaded head; 7. Adjusting rope; 8. Sleeve; 801. Second threaded head; 802. First threaded hole; 9. Connecting hole; 10. Control handle; 1001. Second threaded hole; 1002. Groove; 1003. Fixing handle; 1004. Rotating shaft; 1005. Control plate; 11. Filter screen. Detailed Implementation

[0021] The present invention will be further described below with reference to the embodiments.

[0022] Please see Figure 1-4 This utility model provides a corrosion-resistant handheld device for sampling shallow lakes, comprising: a housing 1, the lower end of which is conical, and an installation groove 101 inside the housing 1. One curved side of the installation groove 101 extends through one side of the housing 1, and a collection bottle 2 is installed inside the installation groove 101. A cover plate 4 is slidably connected to the inner surface of the upper end of the installation groove 101. The upper edge of the cover plate 4 is fixedly connected to the upper end of the installation groove 101 through a connecting component 3. A fixing block 6 is fixedly connected to the upper end of the housing 1. The fixing block 6 is conical, and a first threaded head 601 is provided at the upper end of the fixing block 6. Several sleeves 8 are threadedly connected to the first threaded head 601. An adjustment handle 10 is threadedly connected to the upper end of the uppermost sleeve 8. A connecting hole 9 is provided inside the sleeve 8, and an adjustment rope 7 is provided inside the connecting hole 9. The two ends of the adjustment rope 7 are respectively fixedly connected to the upper end of the cover plate 4 or inside the adjustment handle 10.

[0023] Further as Figure 1 As shown, it is worth noting that connecting blocks 102 are fixedly connected to both sides of the curved surface of the casing 1. Each connecting block 102 on one side is hinged with a hoop 5. The other end of the hoop 5 can be fitted and snapped onto the connecting block 102 on the other side. The hoop 5 is a spring rope. Through the spring hoop structure 5 set on both sides of the casing 1, the hinged connecting blocks 102 can achieve quick opening and closing. This can not only ensure the stable installation of the collection bottle 2, but also allow the bottle to be replaced by one hand, which significantly improves the sampling efficiency.

[0024] Further as Figure 4As shown, it is worth noting that the collection bottle 2 has a discharge port 203 at its lower end, and a first protrusion 201 with a triangular cross-section is fixedly connected to the upper end of the inner curved surface of the collection bottle 2. Several first rubber rings 202 are fixedly connected to the inclined surface of the first protrusion 201, and a second protrusion 401 with a triangular cross-section is fixedly connected to the lower edge of the cover plate 4. Several second rubber rings 402 are fixedly connected to the inclined surface of the second protrusion 401. The first rubber rings 202 and the second rubber rings 402 can be alternately slidably connected. Through the alternating rubber rings 202 / 402 of the triangular cross-section first protrusion 201 and second protrusion 401, a labyrinthine dynamic sealing structure is formed. During the sampling process, the sealing gap is adaptively adjusted according to the water pressure change, effectively preventing the infiltration of mud and sand and the leakage of samples.

[0025] Further as Figure 4 As shown, it is worth noting that there are six connecting components 3 arranged in a ring, and each connecting component 3 includes a return spring 301. A first fixing tube 302 and a second fixing tube 304 are slidably connected inside the return spring 301. The lower end of the second fixing tube 304 is fixedly connected to a sliding block 303. The sliding block 303 is fitted and slidably connected inside the first fixing tube 302. The upper ends of the first fixing tube 302 and the return spring 301 are both fixedly connected to the upper end of the mounting groove 101, and the lower ends of the second fixing tube 304 and the return spring 301 are both fixedly connected to the upper end of the cover plate 4. Through the six ring-distributed connecting components 3, which adopt the combination design of return spring 301 and double sliding tubes 302 / 304, a uniform buffer force is provided when the cover plate 4 is opened and closed, avoiding mechanical jamming and extending the service life of the components by more than 30%. The ring-symmetrical layout of the six connecting components 3, combined with the equal tension distribution of the return spring 301, ensures that the cover plate 4 maintains a horizontal deviation of <0.5° during the opening and closing process, avoiding the sealing failure problem caused by unilateral force.

[0026] The operating procedure is as follows: After adjusting the total length of the equipment by rotating the sleeve 8, the operator holds the control handle 10 and vertically inserts the casing 1 into the shallow water layer. When the V-shaped control plate 1005 of the control handle 10 is pressed, a lever action is formed through the rotating shaft 1004, causing the adjustment rope 7 to be pulled downward in the connecting hole 9, which drives the cover plate 4 to slide open along the curved surface of the mounting groove 101. At this time, lake water flows into the collection bottle 2 through the filter screen 11 of the inlet 103. Impurities in the water are intercepted by the filter screen, and the water flow impact pushes the first rubber ring 202 and the second rubber ring 402 to form a dynamic sealing gap. After sampling is completed, the control plate 1005 is turned in the opposite direction to make the return spring 301 rebound. The cover plate 4 pushes the second protrusion 401 to fit tightly with the first protrusion 201, and the multiple rubber rings form a triple seal. Then, the spring rope hoop 5 is pulled to release the jamming, and the collection bottle 2 can be pulled out laterally for sample transfer. During sampling, the sliding blocks 303 of the six sets of connecting components 3 slide along the first fixed tube 302, and the uniform tension of the return spring 301 maintains the horizontal movement trajectory of the cover plate 4, preventing sealing failure caused by skewing. The five-stage sleeve 8 forms a rigid support structure through the step-by-step connection between the second threaded head 801 and the first threaded hole 802, ensuring the control accuracy of the adjusting rope 7 at an extension length of 2.5 meters.

[0027] Working principle: The spring hoop structure 5 set on both sides of the casing 1 enables rapid opening and closing through the hinged connecting block 102. This ensures the stable installation of the collection bottle 2 and allows for one-handed bottle replacement, significantly improving sampling efficiency. The first protrusion 201 and the second protrusion 401 with triangular cross sections cooperate with the staggered rubber rings 202 / 402 to form a labyrinthine dynamic sealing structure. During sampling, the sealing gap is adaptively adjusted according to water pressure changes, effectively preventing mud and sand infiltration and sample leakage. The six sets of annularly distributed connecting components 3, using a combination of return spring 301 and double sliding tubes 302 / 304, provide uniform buffering force when the cover plate 4 is opened and closed, avoiding mechanical jamming and extending the service life of the components by more than 30%. The annular symmetrical layout of the six sets of connecting components 3, combined with the equal tension distribution of the return spring 301, ensures that the cover plate 4 maintains a horizontal deviation of <0.5° during opening and closing, avoiding sealing failure caused by unilateral force.

[0028] Further as Figure 1 As shown, it is worth noting that there are five sleeves 8, each with a length of 0.2-0.5mm. The upper end of each sleeve 8 is fixedly connected to a second threaded head 801, and the lower end of each sleeve 8 is provided with a first threaded hole 802. By using a 0.2-0.5mm short section design for the five-stage sleeves 8, and in conjunction with the connection method of the second threaded head 801 and the first threaded hole 802, the total length of the equipment can be quickly adjusted within the range of 0.8-2.5m, while ensuring that the torsional strength at the connection is ≥50N·m.

[0029] Further as Figure 3As shown, it is worth noting that the lower center of the control handle 10 has a second threaded hole 1001, which can be threaded to the second threaded head 801. A groove 1002 is located in the middle of one side of the control handle 10, and a fixed handle 1003 is fixedly connected to the lower end of the control handle 10 at the groove 1002. One side of the upper end of the fixed handle 1003 is axially connected to the trough of the "V"-shaped control plate 1005 via a rotating shaft 1004. The other end of the control plate 1005 is slidably connected to both sides of the groove 1002. The lower end of the plate 1005 is fixedly connected to the upper end of the adjusting rope 7 inside the groove 1002. Through the V-shaped adjustment plate 1005 and the guide rail of the groove 1002, the operating force is amplified by 3-5 times through the lever principle, so as to achieve the opening and closing accuracy control of the cover plate at the 4 mm level. The stroke error of the adjusting rope 7 is ≤±1.5 mm. The housing 1 is made of 316L stainless steel base + PTFE composite coating. It has been verified by salt spray test that it can be used continuously for 500 hours in water with pH 4-10 without corrosion. The surface hardness reaches HV300 and the wear resistance is improved by 2 times.

[0030] Further as Figure 2 As shown, it is worth noting that an inlet 103 is provided on the upper end of one curved side of the casing 1. A replaceable filter screen 11 is installed on the outer surface of the inlet 103. The filter screen 11 includes three different pore sizes: 40 mesh, 80 mesh, and 120 mesh. The replaceable filter screen 11 module can be equipped with three layers of 40 / 80 / 120 mesh filters. The filter screen can be replaced within 10 seconds through the snap-on installation structure. It is suitable for different sampling targets such as suspended solids and plankton, and the filtration efficiency is over 98%.

[0031] In summary: By using a 0.2-0.5mm short section design for the five-stage sleeve 8, and coordinating the connection between the second threaded head 801 and the first threaded hole 802, the total length of the equipment can be quickly adjusted within the range of 0.8-2.5m, while ensuring a torsional strength of ≥50N·m at the connection. Through the design of the V-shaped control plate 1005 and the guide rail of the groove 1002, the operating force is amplified 3-5 times through the lever principle, achieving a 4mm-level opening and closing accuracy control for the cover plate. The stroke error of the adjusting rope 7 is ≤±1.5mm. Furthermore, the casing 1 is made of 316L stainless steel with a PTFE composite coating. Verified by salt spray testing, it can be used continuously for 500 hours in water with pH 4-10 without corrosion. The surface hardness reaches HV300, and the wear resistance is improved by 2 times. The snap-on installation structure allows the filter screen to be replaced within 10 seconds, making it suitable for different sampling targets such as suspended solids and plankton, with a filtration efficiency of over 98%.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A corrosion-resistant handheld device for sampling shallow lakes, comprising a housing (1), characterized in that: The lower end of the casing (1) is conical, and the casing (1) has an installation groove (101) inside. One side of the curved surface of the installation groove (101) extends through one side of the casing (1), and a collection bottle (2) is installed inside the installation groove (101). A cover plate (4) is slidably connected to the inner surface of the upper end of the installation groove (101). The upper edge of the cover plate (4) is fixedly connected to the upper end of the installation groove (101) by a connecting component (3), and a fixing device is fixedly connected to the upper end of the casing (1). The fixed block (6) is conical in shape, and the upper end of the fixed block (6) is provided with a first threaded head (601). The first threaded head (601) is threadedly connected to a plurality of sleeves (8). The uppermost sleeve (8) is threadedly connected to an adjustment handle (10). The sleeve (8) is provided with a connecting hole (9). The connecting hole (9) is provided with an adjustment rope (7). The two ends of the adjustment rope (7) are respectively fixedly connected to the upper end of the cover plate (4) or the inside of the adjustment handle (10).

2. The corrosion-resistant handheld device for sampling shallow lakes according to claim 1, characterized in that: Both sides of the curved surface of the casing (1) are fixedly connected to connecting blocks (102), and each connecting block (102) on one side is hinged to a hoop (5). The other end of the hoop (5) can be fitted and snapped onto the connecting block (102) on the other side. The hoop (5) is a spring rope.

3. The corrosion-resistant handheld device for sampling shallow lakes according to claim 1, characterized in that: The collection bottle (2) is provided with a discharge port (203) at the lower end, and a first protrusion (201) with a triangular cross section is fixedly connected to the upper end of the inner curved surface of the collection bottle (2). A plurality of first rubber rings (202) are fixedly connected to the inclined surface of the first protrusion (201), and a second protrusion (401) with a triangular cross section is fixedly connected to the lower edge of the cover plate (4). A plurality of second rubber rings (402) are fixedly connected to the inclined surface of the second protrusion (401). The first rubber rings (202) and the second rubber rings (402) can be alternately slidably connected.

4. The corrosion-resistant handheld device for sampling shallow lakes according to claim 1, characterized in that: The number of connecting components (3) is six, arranged in a ring, and each connecting component (3) includes a return spring (301). A first fixing tube (302) and a second fixing tube (304) are slidably connected inside the return spring (301). The lower end of the second fixing tube (304) is fixedly connected to a sliding block (303). The sliding block (303) is fitted and slidably connected inside the first fixing tube (302). The upper ends of the first fixing tube (302) and the return spring (301) are both fixedly connected to the upper end of the mounting groove (101). The lower ends of the second fixing tube (304) and the return spring (301) are both fixedly connected to the upper end of the cover plate (4).

5. The corrosion-resistant handheld device for sampling shallow lakes according to claim 1, characterized in that: The number of sleeves (8) is five, the length is 0.2-0.5mm, and the upper end of each sleeve (8) is fixedly connected with a second threaded head (801), and the lower end of each sleeve (8) is provided with a first threaded hole (802).

6. The corrosion-resistant handheld device for sampling shallow lakes according to claim 1, characterized in that: The lower end of the control handle (10) is provided with a second threaded hole (1001), which can be threaded to the second threaded head (801). The middle of one side of the control handle (10) is provided with a groove (1002), and the lower end of the control handle (10) is fixedly connected to a fixed handle (1003). The upper end of the fixed handle (1003) is axially connected to the trough of the "V"-shaped control plate (1005) through a rotating shaft (1004). The other end of the control plate (1005) is slidably connected to both sides of the groove (1002), and the lower end of the control plate (1005) is fixedly connected to the upper end of the adjustment rope (7) inside the groove (1002).

7. The corrosion-resistant handheld device for sampling shallow lakes according to claim 1, characterized in that: The upper end of one curved side of the casing (1) is provided with a water inlet (103), and a replaceable filter screen (11) is installed on the outer surface of the water inlet (103). The filter screen (11) includes three different pore sizes: 40 mesh, 80 mesh and 120 mesh.

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