Sediment interstitial water sampling equipment for water sample testing

Abstract

The present invention relates to the technical field of sediment interstitial water sampling equipment in environmental detection, and discloses a sediment interstitial water sampling equipment applied to water sample detection, which includes a sheet structure and a sampling device with a sampler installed inside, the sampler can be displaced under the action of an external force so that the input end of the sampler is displaced to the outside of the sampling device, and the sheet structure is provided with a plurality of first through holes for the input end of the sampler to pass through. The sediment interstitial water sampling equipment disclosed by the present invention can prevent the sampling device from damaging the bottom mud structure, so that the sampling device is closer to the area to be tested when inserted, thereby obtaining more accurate material distribution information.

Description

Technical Field

[0001] The invention relates to the technical field of sediment interstitial water sampling equipment in environmental detection, in particular to a sediment interstitial water sampling equipment applied to water sample detection. Background Art

[0002] The mud-water interface is the boundary between suspended sediments in a body of water and the overlying water. At this interface, both the water properties and the characteristics of the sediments change significantly.

[0003] In natural water environments, such as rivers, lakes, and oceans, the mud-water interface is the boundary between the water and the bottom sediments. For example, in lakes, there is a transitional mud-water interface between the overlying water and the lower layer containing a large amount of silt and organic matter precipitation. This interface is very important for the ecology of the water body. It is the habitat of many benthic organisms and affects the material exchange between the water body and the sediment. It is also the key area for the distribution, transfer, and reduction of nitrogen and phosphorus nutrients, heavy metals, and organic pollutants in the aquatic ecosystem.

[0004] Detection and research on the mud-water interface is an important means to understand, evaluate and improve the aquatic ecosystem environment.

[0005] The measurement methods of mud-water interface include indoor simulation research and in-situ testing. In-situ testing is a method of placing a sampling device in the area to be tested, using negative pressure to obtain the interstitial water in the area, and then studying the interstitial water.

[0006] In the underwater sampling equipment disclosed in the prior art, the sampler is placed in the bottom mud by vertically inserting it from top to bottom. This method easily leads to the destruction of the structure of the mud-water interface, and the overlying water will be brought into the bottom mud, resulting in inaccurate spatial distribution information of the material obtained.

[0007] Based on this defect, the Chinese patent (CN116519386A) proposes a placement device and a sampling device, disclosing a scheme of first inserting the sampling device into the mud-water interface and then inserting the sampler horizontally into the area to be tested for placement. This scheme can obtain interstitial water in a basically undisturbed state, thereby obtaining more accurate interstitial water spatial distribution information.

[0008] However, this solution also has defects: the sampling device needs to be inserted 3 to 5 cm outside the area to be tested, and then the sampler in the sampling device is extended out of the device, penetrating 3 to 5 cm of the bottom mud structure, and extending into the area to be tested. The reason for this is that the sampling device has a certain thickness, and it will also destroy the bottom mud structure of the area to be tested during the insertion process. Therefore, the sampling device needs to be inserted at a certain distance outside the area to be tested. However, in this solution, the input end of the sampler is in an exposed state during the process of penetrating 3 to 5 cm of bottom mud, and the interstitial water outside the area to be tested will enter the sampler to a certain extent, thereby affecting the material distribution information of the area to be tested. Summary of the invention

[0009] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes that before inserting the sampling device, a thin sheet is used at the edge of the test area to block the test area and other areas, and then the sampling device is inserted on the side of the thin sheet away from the test area, so that the sampling device can avoid damaging the bottom mud structure and make the sampling device closer to the test area when inserted, so as to obtain more accurate material distribution information;

[0010] Based on this, the purpose of the present invention is to provide a sediment interstitial water sampling device for water sample detection.

[0011] The sediment interstitial water sampling device for water sample detection proposed in the present invention comprises a sheet structure and a sampling device with a sampler installed inside, the sampler can be displaced under the action of an external force so that the input end of the sampler is displaced outside the sampling device, and a plurality of first through holes for the input end of the sampler to pass through are opened on the sheet structure;

[0012] The purpose of such arrangement is: using the sheet structure to first insert the edge of the area to be tested can block the area to be tested from other areas. Since the sheet structure is very thin, it has a relatively large pressure when inserted. Compared with the sampling device, it can largely avoid the damage to the bottom mud structure. Then inserting the sampling device can avoid the damage to the bottom mud structure. Then the sampler can be extended into the area to be tested through the first through hole for sampling. In this way, the sampling equipment can be brought as close to the detection area as possible to avoid the gap water outside the area to be tested affecting the detection results.

[0013] In some examples of the present invention, the sampling device further includes a sheet-like body, and the sheet-like body is used to close the first through hole on the sheet-like structure.

[0014] The purpose of such arrangement is that before inserting the sampling device into the bottom mud, the sheet body is inserted into the bottom mud along with the sheet structure to close the first through hole, and after the sampling device is inserted, the sheet body is removed to expose the first through hole to ensure the blocking effect of the sheet structure.

[0015] In some examples of the present invention, the sampling device includes a shell and a pushing assembly arranged in the shell. The shell is provided with a second through hole for allowing the input end of the sampler to pass through the outside of the shell. The pushing assembly includes a retractable fence structure and a cylinder and a slider respectively connected to both ends of the fence structure. All samplers are connected to the slider.

[0016] The purpose of such a setting is to control the pushing component by controlling the cylinder, and then control the extension operation of the sampler, so as to realize automation requirements and avoid disturbance of the mud-water interface by manual operation.

[0017] In some examples of the present invention, the fence structure is formed by a plurality of rods hinged together to form a plurality of ends, one end of the fence structure is hinged to the shell, at least the other end is connected to the slider, and the output end of the cylinder is slidably connected to one of the rods.

[0018] The purpose of such a setting is that the fence structure can expand and contract when subjected to force, thereby driving the sampler to move through the slider. Specifically, one end of the fence structure is connected to the shell, and this end does not undergo linear displacement, and the other end is connected to the slider, which then drives the slider to undergo linear displacement under the push of the cylinder.

[0019] In some examples of the present invention, a baffle is formed on the sheet body to correspond to the bottom of the sampling device, an elastic pin is connected to one of the free ends of the fence structure, a third through hole is formed on the wall of the shell for the elastic pin to pass through, a fourth through hole is formed on the baffle for the elastic pin to pass through, and a sliding groove is formed on the sheet structure corresponding to the fourth through hole for the elastic pin to be inserted.

[0020] The purpose of such arrangement is that after the sheet structure and the sheet body are inserted into the bottom mud together, the sampling device needs to be inserted again. By using the stopper corresponding to the bottom of the sampling device, the sheet body can be driven to move during the insertion of the sampling device. When the sheet body moves, the first through hole can be exposed, so that the first through hole corresponds to the second through hole on the sampling device.

[0021] In addition, before inserting the sampling device, the elastic pin passes through the third through hole and the fourth through hole in sequence and extends into the slide groove to connect the sampling device, the sheet body and the sheet structure. In this way, during the insertion of the sampling device, the displacement of the sampling device and the sheet body is consistent, and the sampling device produces linear displacement relative to the sheet structure. The elastic pin displaces in the slide groove to guide the displacement direction of the sampling device and the sheet body; and when the sampling device is displaced to the correspondence between the first through hole and the second through hole, the cylinder drives the fence structure to expand and contract, and the elastic pin is displaced at this time. During the displacement process, interference is generated between the elastic pin and the fourth through hole. The elastic pin contracts under the interference and disengages from the fourth through hole and the slide groove, thereby realizing the separation of the sampling device from the sheet body.

[0022] In some examples of the present invention, the blocking member is a V-shaped groove extending in the transverse direction of the sampling device, and the bottom of the sampling device is a V-shaped structure adapted to the V-shaped groove.

[0023] The purpose of such arrangement is to facilitate the insertion of the baffle and the sampling device into the bottom mud and to minimize the disturbance of the wall surface.

[0024] In some examples of the present invention, the elastic pin includes a pin body for rotationally connecting to the rod, a cap slidably connected to the end of the pin body, and a first elastic member abutting between the cap and the pin body.

[0025] The purpose of such arrangement is that the first elastic member enables the cap to shrink along the axial direction of the pin body under the action of external force, thereby realizing the elastic function.

[0026] In some examples of the present invention, a column groove is formed on the side of the shell facing the sheet structure and is recessed into the shell wall. A sphere and a second elastic member are inserted into the column groove. The second elastic member exposes one end of the sphere outside the column groove in a free state, and a groove corresponding to the sphere is formed on the sheet structure.

[0027] The purpose of such arrangement is that during the displacement of the sampling device, the ball is accommodated in the column groove due to the interference with the sheet structure. When the ball meets the groove, the ball extends out of the column groove under the elastic action of the second elastic member and is placed in the groove. This can indicate whether the sampling device and the sheet structure are in place, that is, whether the first through hole and the second through hole correspond.

[0028] In some examples of the present invention, the sheet structure includes an end wall surface having a first through hole and a side wall surface connected to the end wall surface to form a U-shaped structure.

[0029] The purpose of such arrangement is to make the sheet structure have a relatively stable structure so as to facilitate vertical insertion into the bottom mud.

[0030] In some examples of the present invention, a first slide groove and a second slide groove are formed on the inner side of the side wall surface near one end of the end wall surface, and both the first slide groove and the second slide groove extend longitudinally along the side wall surface. A first extension portion for sliding connection with the first slide groove is extended from the side portion of the sheet body, and a second extension portion for sliding connection with the second slide groove is extended from the side portion of the wall surface on which a second through hole is opened on the shell.

[0031] The purpose of such arrangement is that the first slide groove is used to realize sliding connection between the sheet structure and the sheet body to avoid displacement between the two, and the second slide groove is used to realize sliding connection between the sheet structure and the sampling device to avoid displacement between the two.

[0032] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 It is a schematic diagram of the initial state of the sediment interstitial water sampling device applied to water sample detection in an embodiment of the present invention;

[0035] Figure 2 is a perspective view of a sheet-like structure in an embodiment of the present invention;

[0036] Figure 3 It is a schematic diagram of the state of the sampling device when the sampling device is inserted into the bottom mud in an embodiment of the present invention;

[0037] Figure 4 It is a schematic diagram of the state of the sampling device when the sampler performs sampling operation in an embodiment of the present invention;

[0038] Figure 5 A side view of a sampling device in an embodiment of the present invention;

[0039] Figure 6 is a three-dimensional diagram of a sheet-like body in an embodiment of the present invention;

[0040] Figure 7 It is a front view of the sampling device in the embodiment of the present invention;

[0041] Figure 8 A cross-sectional view of an elastic pin in an embodiment of the present invention;

[0042] Fig. 9 A top view of a sediment interstitial water sampling device used for water sample detection in an embodiment of the present invention;

[0043] Fig.10 Schematic diagram of the structure of the sampler in the embodiment of the present invention.

[0044] Description of reference numerals:

[0045] Sheet structure 1, end wall surface 11, first through hole 111, groove 112, side wall surface 12, slide groove 121, first slide groove 122, second slide groove 123;

[0046] Sampling device 2,

[0047] Shell 21, second through hole 211, V-shaped structure 212, third through hole 213, column groove 214, ball 215, second elastic member 216, second extension 217, transmission pipe outlet 218, connecting piece 219,

[0048] Pushing assembly 22, fence structure 221, first rod 2211, waist-shaped hole 22111, second rod 2212, third rod 2213, fourth rod 2214, fifth rod 2215, first end a, second end b, third end c, fourth end d, fifth end e, cylinder 222, pin 2221, slider 223,

[0049] Elastic pin 23, pin body 231, body pin 2311, body cap 2312, annular groove 2313, elastic female protrusion 2314, cap 232, first cap 2321, second cap 2322, elastic male protrusion 2323, first elastic member 233;

[0050] Sampler 3, fixing part 31, pipe 32, filter membrane 33, transmission pipe 34;

[0051] The sheet body 4 , the stopper 41 , the V-shaped groove 411 , the fourth through hole 422 , and the first extension portion 42 . DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0054] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0056] Reference below Figure 1 to Figure 10 The sediment interstitial water sampling device applied to water sample detection according to an embodiment of the present invention is shown.

[0057] For details, please see the attached Figure 1 , is a schematic diagram of the initial state of a sediment interstitial water sampling device used for water sample detection, the sampling device comprises a sheet structure 1 and a sampling device 2 with a sampler 3 installed inside. In the initial state, the sheet structure 1 is inserted into the bottom mud to separate the area N to be tested from other areas M. In this embodiment, the sheet structure 1 is inserted at D=1cm outside the area N to be tested, and the sampling device 2 is in a state of not being inserted into the bottom mud, that is, it is located at the upper position of the sheet structure 1, staggered with the sheet structure 1. At this time, the sampler 3 is located in the sampling device 2, and sampling operations cannot be performed.

[0058] Please see attached Figure 2 , which is a perspective view of the sheet structure 1. The sheet structure 1 is provided with a plurality of first through holes 111 through which the input end of the sampler 3 can pass, so that in subsequent operations, the sampler 3 can be displaced under the action of an external force so that the input end of the sampler 3 is exposed outside the sampling device 2, and at the same time, the input end of the sampler 3 passes through the first through hole 111 and enters the area to be tested N, thereby preparing for the sampling operation.

[0059] Please continue to see the attached Figure 1 When the sampling device 2 is staggered with the sheet structure 1, in order to avoid the disturbance of the bottom mud structure, the sampling device also includes a sheet body 4, which is used to close the first through hole 111 on the sheet structure 1, that is, in the initial position, the sheet body 4 corresponds to the first through hole 111 and fits with the sheet structure 1, and is located at the lower end of the sampling device 2.

[0060] Please see attached Figure 3, which is a schematic diagram of the state of the sampling device when the sampling device 2 is inserted into the bottom mud. At this time, the sampling device 2 is displaced downward under the action of external force, and at the same time drives the sheet body 4 to be displaced downward until the sampler 3 in the sampling device 2 can correspond to the first through hole 111, that is, in this state, the sampling device 2 corresponds to the sheet structure 1 and the area to be measured N, while the sheet body 4 is misaligned with the first through hole 111 and the sheet structure 1 at the same time.

[0061] Please see attached Figure 4 , which is a schematic diagram of the state of the sampling device when the sampler 3 performs sampling operation. In this state, the sampler 3 is displaced by external force, and its input end passes through the sampling device 2, penetrates the sheet structure 1, and is placed in the area to be tested N. At this time, negative pressure is used to obtain interstitial water for sampling operation.

[0062] Please continue to see the attached Figure 1 , Attachment Figure 3~4 The sampling device 2 includes a housing 21 and a pushing assembly 22 disposed in the housing 21. The housing 21 is a relatively thin square housing. The pushing assembly 22 includes a retractable fence structure 221 and a cylinder 222 and a slider 223 respectively connected to both ends of the fence structure 221. All samplers 3 are connected to the slider 223. In this way, the retracting operation of the fence structure 221 can be controlled by the cylinder 222, and then the sampler 3 is pushed by the slider 223 to make it move. Figure 1 and attached Figure 3 As shown, when the sampling device 2 is in the initial state and inserted into the bottom mud, the fence structure 221 is in a contracted state, as shown in the attached Figure 4 As shown, when the sampler 3 performs sampling operation, the fence structure 221 is in an extended state.

[0063] Please see attached Figure 5 , which is a side view of the sampling device 2, a plurality of second through holes 211 are provided on the side of the shell 21 for the input end of the sampler 3 to pass through the shell 21. In this way, when the fence structure 221 is in an extended state, the sampler 3 can be pushed through the second through hole 211 to pass through the shell 21.

[0064] Please continue to see the attached Figure 1 , Attachment Figure 3~4 The fence structure 221 is formed by hingedly connecting five rods, and the five rods include a first rod 2211, a second rod 2212, a third rod 2213, a fourth rod 2214 and a fifth rod 2215 which are hingedly connected to each other;

[0065] The first rod 2211, the second rod 2212, the third rod 2213, and the fourth rod 2214 are connected end to end to form a movable quadrilateral, one end of the fifth rod 2215 is hinged to the middle of the second rod 2212, the middle of the fifth rod 2215 is hinged to the middle of the fourth rod 2214, and the other end of the fifth rod 2215 is a free end;

[0066] This connection mode forms five ends of the fence structure 221. Specifically, the connection end of the first rod 2211 and the second rod 2212 is the first end a of the fence structure 221. A connecting piece 219 is fixedly provided at the first end a in the housing 21. The first end a is hinged to the connecting piece 219.

[0067] The connecting end of the first rod 2211 and the fourth rod 2214 is the second end b of the fence structure 221, and the second end b is a free end;

[0068] The free end of the fifth rod 2215 and the connecting ends of the third rod 2213 and the fourth rod 2214 are respectively the third end c and the fourth end d of the fence structure 221. The third end c and the fourth end d are both hinged on the slider 223. In this way, the fence structure 221 can smoothly push the slider 223 to move during the extension process.

[0069] The connecting end of the second rod 2212 and the third rod 2213 serves as the fifth end e of the fence structure 221 . The function of the fifth end e is described below.

[0070] Please continue to see the attached Figure 1 , Attachment Figure 3~4 The connection method between the cylinder 222 and the fence structure 221 is as follows: the cylinder 222 is fixed outside the shell 21, and its output end extends into the shell 21, and is set at a certain angle with the first rod 2211. The first rod 2211 is provided with a waist-shaped hole 22111, and the waist-shaped hole 22111 extends along the extension direction of the first rod 2211, that is, the waist-shaped hole 22111 also forms an angle with the output end of the cylinder 222, and the output end of the cylinder 222 is connected with a pin 2221, and the pin 2221 is placed in the waist-shaped hole 22111 to achieve a sliding connection with the fence structure 221, so that when the output end of the cylinder 222 is displaced, it can interfere with the first rod 2211 to make the fence structure 221 expand and contract.

[0071] Please see attached Figure 6 , which is a three-dimensional diagram of the sheet body 4, a stopper 41 is formed on the sheet body 4 to correspond to the bottom of the sampling device 2. In this way, when the stopper 41 is aligned with the bottom of the sampling device 2, the sheet body 4 can be driven to move when the sampling device 2 is pushed to move.

[0072] Please continue to see the attached Figures 5 and 6The stopper 41 is a V-shaped groove 411 extending laterally along the sampling device 2, and the bottom of the sampling device 2 is a V-shaped structure 212 adapted to the V-shaped groove 411. The purpose of such a setting is to make it easier for the V-shaped structure 212 to extend into the bottom mud.

[0073] Please continue to see the attached Figure 1 , Attachment Figure 3~4 , the fifth end e of the fence structure 221 is connected with an elastic pin 23;

[0074] Also, see the attached Figure 2 , Attachment Figures 6 and 7 , attached Figure 7 It is a front view of the sampling device 2. A third through hole 213 is provided on the wall of the housing 21 for the elastic pin 23 to pass through. A fourth through hole 422 is provided on the blocking member 41 for the elastic pin 23 to pass through. A sliding groove 121 is formed on the sheet structure 1 corresponding to the fourth through hole 422 for the elastic pin 23 to be placed.

[0075] Thus, when the sampling equipment is located near Figure 1 and attached Figure 3 When the state is reached, the elastic pin 23 sequentially passes through the third through hole 213 and the fourth through hole 422 and extends into the slide groove 121, so that the sampling device 2, the sheet body 4 and the sheet structure 1 can be connected. Specifically, the sampling device 2 and the sheet body 4 are in a relatively fixed state, and the sampling device 2, the sheet body 4 and the sheet structure 1 are in a slidable state. In this way, the sampling device 2 and the sheet body 4 can achieve the same displacement operation, and the two can achieve relative sliding with the sheet structure 1. This method can ensure that the sampling device 2 and the sheet body 4 are in contact with the longitudinal displacement of the sheet structure 1 to the greatest extent, and ensure the linearity of the displacement;

[0076] When the sampling equipment is located near Figure 4 When the state is reached, the fence structure 221 changes, driving the elastic pin 23 to move. Due to the elastic properties of the elastic pin 23, it can interfere with the fourth through hole 422 of the sheet body 4 and shrink, thereby separating from the sheet body 4 and the sheet structure 1. At this time, the sampling device 2 is in place, and the function of the elastic pin 23 is completed.

[0077] Please see attached Figure 8 , is a cross-sectional view of the elastic column pin 23, the elastic column pin 23 includes a column pin body 231 for rotationally connecting with the rod member, the column pin body 231 is composed of a body pin 2311 and a body cap 2312, the body pin 2311 is inserted into the body cap 2312 with an interference fit, and an annular groove 2313 is formed in the middle of the two, and the annular groove 2313 is used for connecting the second rod member 2212 and the third rod member 2213;

[0078] The elastic pin 23 also includes a cap 232 slidably connected to both ends of the pin body 231, the cap 232 includes a first cap 2321 and a second cap 2322, and also includes a first elastic member 233 abutting between the cap 232 and the pin body 231; specifically, elastic female protrusions 2314 are formed at both ends of the pin body 231, and elastic male protrusions 2323 are formed at the inner edge of the end of the cap 232, and the elastic male protrusion 2323 passes over the elastic female protrusion 2314 to achieve sliding connection between the cap 232 and the pin body 231;

[0079] When the elastic pin 23 is subjected to interference, the cap 232 is subjected to pressure to compress the first elastic member 233, thereby achieving elastic action. The first elastic member 233 is specifically a cylindrical spring.

[0080] Please continue to see the attached Figure 1 , Attachment Figure 3~4 The side of the shell 21 facing the sheet structure 1 is recessed into the wall of the shell 21 to form a column groove 214, a ball 215 and a second elastic member 216 are inserted into the column groove 214, and the second elastic member 216 exposes one end of the ball 215 outside the column groove 214 in a free state;

[0081] Also, see the attached Figure 2 , a groove 112 corresponding to the sphere 215 is formed on the sheet structure 1;

[0082] The purpose of such arrangement is that when the sampling device 2 moves down to a certain position, the ball 215 meets the groove 112 and falls into the groove 112, thereby producing an obvious sense of frustration, thereby reminding the operator that the sampling device 2 is in place, that is, the first through hole 111 corresponds to the second through hole 211 at this time, providing conditions for the extension of the sampler 3.

[0083] Please continue to see the attached Figure 2 The sheet structure 1 includes an end wall surface 11 having a first through hole 111 and a side wall surface 12 connected to the end wall surface 11 to form a U-shaped structure. Designing the sheet structure 1 to be U-shaped can improve the stability of the sheet structure 1 and ensure that the sheet structure 1 can be vertically inserted into the bottom mud.

[0084] Please continue to see the attached Figure 2 and attached Fig. 9 , attached Fig. 9 The top view of the sediment interstitial water sampling device used for water sample detection is shown in FIG. A first chute 122 and a second chute 123 are formed on the inner side of the side wall 12 near one end of the end wall 11. The first chute 122 and the second chute 123 both extend in the longitudinal direction of the side wall 12.

[0085] Please also refer to the attached Figures 5 and 6The side of the sheet body 4 extends a first extension portion 42 for sliding connection with the first slide groove 122, and the side of the wall surface of the housing 21 on which the second through hole 211 is opened extends a second extension portion 217 for sliding connection with the second slide groove 123;

[0086] The first extension portion 42 cooperates with the first slide groove 122 to realize the sliding connection between the sheet body 4 and the sheet structure 1, so as to further ensure the relative displacement between the two in the fitted state;

[0087] Similarly, the second extension portion 217 cooperates with the second slide groove 123 to achieve a sliding connection between the sampling device 2 and the sheet structure 1, and is also used to further ensure relative displacement between the two in the fitted state.

[0088] Please see attached Fig.10 , is a structural schematic diagram of the sampler 3, the sampler 3 specifically includes a fixing portion 31, the fixing portion 31 is connected to the slider 223, the sampler 3 also includes a pipe 32, the pipe 32 is a waterproof sealing hose, supported on the fixing portion 31, one end of which is open, and the other end is sealed and connected to the transmission pipe 34, a filter membrane 33 is provided at the opening, the filter membrane 33 is a polyvinylidene fluoride hollow fiber ultrafiltration membrane, which is used to filter impurities in the interstitial water, and the transmission pipe 34 is used to transmit the interstitial water to the outside of the sampling device 2.

[0089] Please continue to see the attached Figure 1 , Attachment Figure 3~4 The shell 21 is also provided with a transmission tube outlet 218 , and all transmission tubes 34 are led out of the sampling device 2 through the transmission tube outlet 218 .

[0090] Other components according to the embodiment of the present invention, such as the cylinder and the like, and operations are well known to those skilled in the art and will not be described in detail here.

[0091] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0092] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. Sediment interstitial water sampling equipment used for water sample detection, characterized in that: A sampling device comprising a sheet structure and a sampler installed therein, wherein the sampler can be displaced under the action of an external force so that the input end of the sampler is displaced outside the sampling device, and the sheet structure is provided with a plurality of first through holes through which the input end of the sampler can pass; Also comprising a sheet-like body, the sheet-like body is used to close the first through hole on the sheet-like structure; The sampling device includes a shell and a pushing component arranged in the shell, the pushing component includes a retractable fence structure, a blocking member corresponding to the bottom of the sampling device is formed on the sheet body, one of the free ends of the fence structure is connected to an elastic pin, a third through hole for the elastic pin to pass through is formed on the wall surface of the shell, a fourth through hole for the elastic pin to pass through is formed on the blocking member, and a sliding groove for the elastic pin to be inserted is formed on the sheet structure corresponding to the fourth through hole.

2. The sediment interstitial water sampling device for water sample detection according to claim 1, characterized in that: The shell is provided with a second through hole for the input end of the sampler to pass through and out of the shell, and a cylinder and a slide block respectively connected to the two ends of the fence structure, and all the samplers are connected to the slide block.

3. The sediment interstitial water sampling device for water sample detection according to claim 2, characterized in that: The fence structure is formed by hingedly connecting a plurality of rods to form a plurality of ends. One end of the fence structure is hingedly connected to the shell, and at least the other end is connected to the slider. The output end of the cylinder is slidably connected to one of the rods.

4. The sediment interstitial water sampling device for water sample detection according to any one of claims 1 to 3, characterized in that: The blocking member is a V-shaped groove extending in the transverse direction of the sampling device, and the bottom of the sampling device is a V-shaped structure adapted to the V-shaped groove.

5. The sediment interstitial water sampling device for water sample detection according to claim 3, characterized in that: The elastic pin comprises a pin body for rotationally connecting with the rod, a cap slidably connected to the end of the pin body, and a first elastic member abutting between the cap and the pin body.

6. The sediment interstitial water sampling device for water sample detection according to any one of claims 1 to 3, characterized in that: The shell has a column groove recessed into the shell wall on one side facing the sheet structure, a sphere and a second elastic member are placed in the column groove, and the second elastic member exposes one end of the sphere outside the column groove in a free state, and a groove corresponding to the sphere is formed on the sheet structure.

7. The sediment interstitial water sampling device for water sample detection according to claim 2 or 3, characterized in that: The sheet structure includes an end wall surface on which the first through hole is opened and a side wall surface connected with the end wall surface to form a U-shaped structure.

8. The sediment interstitial water sampling device for water sample detection according to claim 7, characterized in that: A first slide groove and a second slide groove are formed on the inner side of the side wall surface near one end of the end wall surface, and the first slide groove and the second slide groove both extend in the longitudinal direction of the side wall surface. A first extension portion for sliding connection with the first slide groove extends from the side portion of the sheet body, and a second extension portion for sliding connection with the second slide groove extends from the side portion of the wall surface on which the second through hole is opened on the shell.

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