CN117723346B - Efficient sample preparation device in environmental water sample - Google Patents

Abstract

The invention discloses a high-efficiency sample preparation device in an environmental water sample, which comprises a frame body, wherein a plurality of storage bottles are placed on the frame body, the device also comprises a sampling assembly and a driving mechanism, the sampling assembly comprises a container with openings at two ends, electric control plugging pieces are arranged at two ends of the container, and the driving mechanism is used for driving the sampling assembly to move along the length direction of the device; according to the sample preparation device provided by the invention, the sampling container is arranged into the pipe body with the two ends open, the blocking pieces are arranged at the two ends of the pipe body, when sampling is carried out, the two blocking pieces are kept in the open state, when the pipe body is driven to move downwards towards the sampling depth of the water body, the inside of the pipe is always filled with water, when the sampling depth is reached, the blocking pieces are directly closed, so that the water with the depth to be sampled can be intercepted in the pipe body, and excessive sediment caused by direct extraction is prevented from being sampled together, so that the result of the sample is more similar to the actual result.

Description

Efficient sample preparation device in environmental water sample

Technical Field

The invention relates to the technical field of sampling devices, in particular to a high-efficiency sample preparation device in an environmental water sample.

Background

In resident's daily life, can produce more domestic sewage inevitably, the pollutant that domestic sewage contained is mainly organic matter and a large amount of pathogenic microorganism, consequently needs in time handle it to avoid bacterium and pathogen to use organic matter in the domestic sewage to be nutrition and propagate in a large number, in order to provide the targeted processing, can establish different sewage treatment stations in the subregion, in addition in order to continuously monitor the composition of domestic sewage, can adopt sampling device to sample respectively and detect.

The utility model discloses a domestic sewage sampling device, it includes the bottom plate, can replace the well lid, subside suction head, hoist engine and divide appearance temporary storage subassembly, the hoist engine is fixed on can replacing the well lid, just twine on the reel of hoist engine has the feed liquor hose, the fixed intercommunication of one end of feed liquor hose has the subsidence suction head, the through-hole has been seted up at the middle part of can replacing the well lid, the one end that the suction head was kept away from to the feed liquor hose is linked together with the inlet end of the pump body, the fixed intercommunication of outlet end of the pump body has a liquid steel pipe, the liquid steel pipe adopts the adapter to be linked together with divide appearance temporary storage subassembly, divide appearance temporary storage subassembly can deposit the sewage sample round circumferencial direction in proper order, this device is provided with can replace well lid and hoist engine for the subside suction head suction can stably subside and with the domestic sewage water contact in the sewer, the sewage in the sewer is convenient for the extraction, and the stirring leaf is driven to stir in order to improve the reliability and the homogeneity of sample.

The existing sampling equipment adopts a direct extraction mode to sample, when the sampling is carried out on sewage close to a lower water area, particularly a sewage sedimentation layer, a large amount of sediment can be extracted along with water flow due to direct water pumping, so that the amount of the sediment in a water taking sample is larger than a normal value, and the sediment content is lower due to a filtering mode, so that a larger error occurs in a detection result.

Disclosure of Invention

The object of the present invention is to provide a sample preparation device with high sampling accuracy.

In order to achieve the above object, the present invention provides the following technical solutions:

The utility model provides a high-efficient sample preparation facilities in environment water sample, includes the support body, has placed a plurality of storage bottle on the support body, still includes:

the sampling assembly comprises a container with openings at two ends, and electric control plugging pieces are arranged at two ends of the container;

the driving mechanism is used for driving the sampling assembly to move along the length direction of the sampling assembly.

The sample preparation device comprises the sealing piece, wherein the sealing piece comprises an iris valve and a driving piece for driving the iris valve to open and close.

Above-mentioned sample preparation device, iris valve include the collar, rotate on the collar and be connected with the ring gear, and the inboard of collar is rotated through the pivot and is connected with a plurality of iris diaphragm, and a plurality of iris diaphragm uses the axis of collar to be central circumference array distribution, all overlaps in the pivot and is equipped with first gear, and first gear and the inboard meshing of ring gear still rotate in the outside of collar and be connected with the second gear, and the outside meshing of second gear and ring gear.

The sample preparation device further comprises a water pumping assembly, wherein the water pumping assembly is used for pumping water in the container into the storage bottle.

According to the sample preparation device, the container is a cylindrical rubber sleeve, two ends of the rubber sleeve are fixedly connected with the mounting rings of the two iris valves respectively, and the two mounting rings are fixedly connected through the connecting piece.

Above-mentioned sample preparation device, the driving piece includes driving motor and actuating lever, and the lateral wall of actuating lever is fixed with spacing conducting bar, and the both ends of actuating lever are passed by a set of second gear middle part respectively.

In the sample preparation device, one end of the rubber sleeve penetrates through the inner side of one group of mounting rings and is connected with the mounting rings, and the other end of the rubber sleeve penetrates through the inner side of the other group of mounting rings and is connected with the other group of mounting rings.

According to the sample preparation device, rubber pads are connected to the side surfaces of the iris diaphragms, which are in contact with the rubber sleeves.

Above-mentioned sample preparation device all is provided with the locating part that is used for restricting the rubber sleeve on the collar.

The limiting piece comprises a limiting ring, and the limiting ring is in threaded connection with the mounting ring.

In the technical scheme, the sample preparation device provided by the invention has the advantages that the sampling container is arranged into the pipe body with the two ends open, the two plugging pieces are arranged at the two ends of the pipe body, when sampling is carried out, the two plugging pieces are kept in an open state, when the pipe body is driven to move downwards towards the sampling depth of the water body, the inside of the pipe is always filled with water, when the sampling depth is reached, the plugging pieces are directly closed, the water with the depth to be sampled can be intercepted in the pipe body, and excessive sediment caused by direct extraction is avoided to be sampled together, so that the result of the sample is closer to the actual result.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.

FIG. 1 is a schematic diagram of a front structure according to an embodiment of the present invention;

FIG. 2 is an enlarged partial schematic view of FIG. 1 provided in an embodiment of the present invention;

fig. 3 is a partial cross-sectional view of a sampling assembly according to an embodiment of the present invention.

Fig. 4 is a schematic view of an internal structure of a mounting ring according to an embodiment of the present invention.

FIG. 5 is an enlarged schematic view of FIG. 3A according to an embodiment of the present invention;

FIG. 6 is a cross-sectional view of a stop collar provided in an embodiment of the present invention when the press collar is not being compressed;

fig. 7 is a cross-sectional view of a stop collar in a pressed state of a press ring according to an embodiment of the present invention.

Reference numerals illustrate:

1. A frame body; 11. a storage bottle; 12. a first electric push rod; 13. a trolley; 2. a sampling assembly; 21. a blocking member; 211. a mounting ring; 212. a toothed ring; 213. a rotating shaft; 214. iris diaphragm; 215. a first gear; 216. a second gear; 22. a rubber sleeve; 221. a water outlet; 23. an elastic telescopic rod; 24. a driving motor; 25. a driving rod; 251. limiting guide bars; 26. a limiting ring; 261. a compression ring; 262. a connecting ring; 27. a second electric push rod; 3. a water pumping assembly; 31. a centrifugal pump; 32. a pipeline.

Detailed Description

In order to make the technical scheme of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.

In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as directions or positional relationships based on the directions or positional relationships shown in the drawings, merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the invention. In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 7, the device for preparing a high-efficiency sample in an environmental water sample provided by the embodiment of the invention comprises a frame body 1, wherein a plurality of storage bottles 11 are placed on the frame body 1, and the device further comprises:

the sampling assembly 2, the sampling assembly 2 comprises a container with openings at two ends, and electric control plugging pieces 21 are arranged at two ends of the container;

and the driving mechanism is used for driving the sampling assembly 2 to move along the length direction of the sampling assembly.

Specifically, in a conventional sampling mode, a sampling tank is usually placed directly at the depth to be sampled in a water area, water at the depth is pumped into the sampling tank in a direct pumping mode, and as the water is directly pumped into the sampling tank, excessive sediment in the water is pumped into the sampling tank, especially, water with more sediment and sampling depth close to a sediment layer is sampled, and a filter screen is arranged at a water inlet, the sediment is filtered, so that the sampled sample contains fewer sediment, and a larger deviation between a detection result and an actual result is caused; in this embodiment, the frame 1 is a main structure of the preparation device, and is used for installing the sampling assembly 2 and the driving mechanism, where the frame 1 is provided with a storage cabinet, as shown in fig. 1, optionally, a storage rack is provided in the storage cabinet, the storage rack is used for placing the storage bottle 11, the frame 1 is further provided with the sampling assembly 2 and a driving mechanism for driving the sampling assembly 2 to move along its length direction, the sampling assembly 2 includes a container with two ends provided with openings, both ends of the container are provided with electric control plugging pieces 21, optionally, the container is a cylindrical pipe body, the plugging pieces 21 are existing electric control valves, the driving mechanism adopts an existing linear driving mechanism such as a first electric push rod 12, the first electric push rod 12 is vertically fixed on the frame 1, the pipe body is vertically fixed on an output end of the first electric push rod 12, when the first electric push rod 12 extends, the pipe body can be driven to lift along its own axial direction, and when in a specific implementation, the frame 1 can be installed on a trolley 13 or other mobile equipment such as a mechanical arm, so as to move the preparation device, and the preferred trolley 2 is protruded from one side of the trolley 13, as shown in fig. 1;

When sampling is carried out, firstly, the frame body 1 is moved to a position to be sampled through the trolley 13, at the moment, two electric control valves are required to be kept in an open state, then, the pipe body is driven to vertically descend to the depth to be sampled in water through the first electric push rod 12, as the two electric control valves are in an open state and the pipe body descends along the self axis, the disturbance to the water is small in the descending process of the pipe body, the inside of the pipe body is always filled with water, when the pipe body descends to the sampling depth, the two electric control valves are controlled to be closed, at the moment, the water to the sampling depth can be stored in the pipe body by the intercepting part, and the pipe body is driven to ascend through the first electric push rod 12 to finish sampling.

The sample preparation device that this embodiment provided is through setting up the sampling container into both ends open-ended body to set up shutoff piece 21 at the both ends of body, when taking a sample, keep two shutoff pieces 21 to be in open-ended state, when the body is driven to the sampling depth of water downwardly moving, the inside water that fills of pipeline 32 all the time, when reaching the sampling depth, the direct shutoff piece 21 of closing can be with the water interception of waiting the sampling depth in the body, avoid direct extraction to lead to too much precipitate to be together sampled, make the result of sample be close actual result more.

Further, the blocking piece 21 comprises an iris valve and a driving piece for driving the iris valve to open and close.

Still further, the iris valve comprises a mounting ring 211, the mounting ring 211 is rotatably connected with a toothed ring 212, the inner side of the mounting ring 211 is rotatably connected with a plurality of iris diaphragms 214 (each rotating shaft 213 is connected with an iris diaphragm 214), the plurality of iris diaphragms 214 are distributed in a circumferential array by taking the axis of the mounting ring 211 as the center, the rotating shafts 213 are sleeved with first gears 215, the first gears 215 are meshed with the inner side of the toothed ring 212, the outer side of the mounting ring 211 is rotatably connected with a second gear 216, and the second gears 216 are meshed with the outer side of the toothed ring 212.

Specifically, because the aperture of the water supply flow in the electric control valve is smaller relative to the body, when the water supply flow moves downwards along with the pipeline 32 synchronously, the disturbance to the water flow is larger, so that the distribution condition of sediment at the sampling depth is changed, and the sampling result deviates from the actual numerical value; in this embodiment, the iris valve is adopted as the plugging piece 21, and a driving piece for driving the iris valve to open and close is provided, as shown in fig. 4, where the iris valve includes a mounting ring 211, the mounting ring 211 is rotationally connected with a toothed ring 212 and an iris plate 214, the toothed ring 212 includes internal teeth disposed at the inner side thereof and external teeth disposed at the outer side thereof, the iris plate 214 is rotationally connected with the mounting ring 211 through a rotating shaft 213, and the iris plate 214 and the rotating shaft 213 are both disposed at the inner side of the toothed ring 212, a cavity for accommodating the toothed ring 212 and the iris plate 214 is formed in the interior of the mounting ring 211, in addition, the rotating shaft 213 is sleeved with a first gear 215, each first gear 215 is meshed with the internal teeth of the toothed ring 212, so that when the toothed ring 212 rotates, the corresponding first gear 215 can drive each iris plate 214 to rotate, opening and closing of the iris valve can be realized, and the mounting ring 211 is rotationally connected with a second gear 216, the second gear 216 is meshed with the external teeth of the toothed ring 212, the output end of the driving piece is directly connected with the second gear 216, and the driving piece is optionally driven by a motor 216, and the second gear 216 is mounted on the inner side of the mounting ring 211 and is further meshed with the second gear 216, and the hollow ring 211 is further meshed with the internal teeth of the hollow ring 211, thereby reducing the diameter of the hollow cavity is further arranged, and the hollow ring is opened, and the hollow ring is further meshed with the hollow ring 211 is opened by the hollow ring 211.

In another embodiment of the present invention, the water pumping assembly 3 is further included, and the water pumping assembly 3 is used for pumping water in the container into the storage bottle 11.

Specifically, when sampling the same water body, such as a sedimentation tank of a sewage treatment plant, water with different depths is often required to be sampled, and when the mode is adopted for sampling, the pipe body is required to be lifted to be above the water surface for multiple times, in a single sampling stroke, the blocking piece 21 is required to be closed to be removed from the pipe body to be above the water surface, then the blocking piece 21 is opened again through the storage bottle 11, and the pipe body is reduced to another sampling depth again, so that the repeated operation has large disturbance on the water and complex operation; in this embodiment, by providing the pumping assembly 3, optionally, the pumping assembly 3 is a miniature submersible pump (not shown in the figure) fixedly connected to a set of mounting rings 211, the water outlet end of the submersible pump is connected to a first water pipe, the other end of the first water pipe is fixed to the frame 1, so that when the submersible pump pumps water, the storage bottle 11 is used for receiving the water, the container is provided with the water outlet 221, the water inlet end of the submersible pump is communicated with the water outlet 221 through a second water pipe, meanwhile, the pipe body can shrink axially along the self, and since the pipe body only has one water outlet 221, when the water in the pipe body is pumped outwards through the water outlet 221, the air pressure in the pipe body can be gradually reduced, so that the water pumping difficulty of the submersible pump is gradually increased, even the water sample in the pipe body cannot be pumped out, and therefore the pipe body can shrink axially, optionally, the elastic corrugated pipe body adopts the elastic pipe, when the water sample in the pipe body is pumped out, the water sample in the pipe body is deformed axially along the self, the internal space of the pipe body is reduced, so that the trend of the water sample in the pipe body is delayed, and the water sample in the pipe body is pumped out;

When continuous sampling is carried out, firstly, water with the depth to be sampled is intercepted according to the mode and stored in the pipe body, after the iris valve is closed, the intercepted water source in the pipe body is directly extracted through the arranged submersible pump, because the pipe body is kept in a sealed state, in order to facilitate the submersible pump to extract the intercepted water from the pipe body, the pipe body is arranged into an elastic deformation pipe such as a rubber pipe or an elastic corrugated pipe, the deformation of the pipe body is adapted to the reduction of the water or air quantity in the pipe body during water pumping, so that the container is prevented from being influenced by the external water pressure of the container to be shrunken, after water sample extraction is completed, the water pumping group is closed, the iris valve is opened, the pipe body is restored to an initial state, the pipe body is adjusted to the next sampling depth through the first electric push rod 12, and the operation is repeated.

Further, the container is a cylindrical rubber sleeve 22, two ends of the rubber sleeve 22 are fixedly connected with mounting rings 211 of the two iris valves respectively, and the two mounting rings 211 are fixedly connected through a connecting piece.

Specifically, in the above embodiment, the elastic bellows is used as the container, so that the container has a deformation function, and the water in the pipe body is extracted into the storage bottle 11 for storage through the deformation of the container and the water pumping assembly 3, and as the inner wall of the bellows is rugged, the sediment is easy to adhere to the inner wall of the bellows and is difficult to clean, the subsequent sampling is affected, and the deformation amount of the bellows is limited, so that a large part of intercepted water in the pipe body can be left and can not be extracted; in this embodiment, the rubber sleeve 22 is adopted as the body of the container, the mounting rings 211 of the two iris valves are respectively connected with two ends of the rubber sleeve 22, and the two mounting rings 211 are directly connected by a connecting piece, and optionally, the connecting piece is an elastic telescopic rod 23, two ends of the elastic telescopic rod 23 are respectively fixedly connected with the two mounting rings 211, and it is to be noted that, in this embodiment, since the rubber sleeve 22 does not have the supporting property, the output end of the first electric push rod 12 is connected with one mounting ring 211, as shown in fig. 1 and 2, the output end of the first electric push rod 12 is fixedly connected with the upper end surface of the mounting ring 211 above, so that the mounting ring 211 and the rubber sleeve 22 can be driven to move downwards along the axial direction of the first electric push rod 12 when the first electric push rod 12 extends.

In this embodiment, the rubber sleeve 22 is used as a container for storing water, firstly, the initial state of the rubber sleeve 22 is cylindrical, the inner wall of the rubber sleeve is not easy to adhere to sediment in the process of sampling, and secondly, the rubber sleeve 22 is soft, when the pumping assembly 3 pumps the inside of the rubber sleeve 22, the rubber sleeve 22 can be deformed greatly, so that a large amount of water cannot be pumped out without remaining inside the rubber sleeve 22.

In yet another embodiment of the present invention, the driving member includes a driving motor 24 and a driving rod 25, a limiting bar 251 is fixed on a side wall of the driving rod 25, and two ends of the driving rod 25 respectively pass through the middle of a set of second gears 216. The driving rod 25 is arranged along the axial direction of each second gear 216 in a penetrating way, and is matched with a guide bar connected with the outer wall of the driving rod 25 through a guide groove formed on each second gear 216, and the second gears 216 are driven to rotate through the guide bar 251, so that driving is realized, as the driving rod 25 directly penetrates through two groups of second gears 216, when the 23 stretches and contracts, the length of the 25 is unchanged, and the two groups of second gears 216 directly slide on the outer wall of the 25 (the driving rod is not influenced to drive the two second gears 216 to rotate)

Specifically, for convenience of description, when sampling is performed, the upper mounting ring 211 is a first ring, the lower mounting ring 211 is a second ring, the driving motor 24 is fixedly connected to the upper end surface of the first ring, a sealing cover for protecting the driving motor 24 is arranged on the first ring, the driving rod 25 is vertically arranged, the upper end of the driving rod 25 penetrates through the upper part of the driving rod along the axial direction of the second gear 216 corresponding to the first ring and is fixedly connected with the output shaft of the driving motor 24, the lower end of the driving rod 25 penetrates through the lower part of the driving rod along the axial direction of the second gear 216 on the second ring, and preferably, a stop block is arranged at the lower end of the driving rod 25; the axes of the second gears 216 on the two mounting rings 211 coincide, and the middle parts of the two groups of second gears 216 are provided with guide grooves matched with the limit guide bars 251, the guide grooves are formed in a penetrating manner along the axial direction of the second gears 216, the arrangement is such that the driving motor 24 can drive the two second gears 216 to rotate simultaneously, the two iris valves are synchronously driven to open and close, and the arrangement of the driving rod 25 does not influence the mutual approaching of the first ring and the second ring due to the matching of the limit guide bars 251 and the guide grooves, so that when the pumping assembly 3 pumps water, the first ring and the second ring can mutually approach to adapt to the deformation of the rubber sleeve 22.

Further, one end of the rubber bush 22 is passed through from the inside of one set of mounting rings 211 and is connected to the mounting rings 211, and the other end of the rubber bush 22 is passed through from the inside of the other set of mounting rings 211 and is connected to the other set of mounting rings 211. The rubber sleeve passes through the inner side of the iris valve, the two ends of the iris valve can be extruded to shrink in the process of switching from the opening state to the closing state, and when the iris valve tends to be in the closing state, the iris sheet extrudes the rubber sleeve to be in the minimum state, and the operation is similar to the operation of tightening the bag opening.

Specifically, in the above embodiment, in the opening or closing process of the two iris valves, the iris plates 214 are directly contacted with water, so that attachments in the water are easily clamped by the iris plates 214 or adhered to the iris plates 214, thereby polluting the water sample collected next time; in this embodiment, through passing the two ends of the rubber sleeve 22 through the corresponding inner sides of the iris valves respectively and fixing the two ends of the rubber sleeve 22 to the upper end face of the first ring and the lower end face of the second ring respectively, so setting, when the iris valves are closed, the iris sheet 214 is pressed to deform the rubber sleeve 22, the openings at the two ends of the rubber sleeve 22 are closed, and the sediments adhered to the iris sheet 214 during sampling can not pollute the water in the rubber sleeve 22.

Further, each iris diaphragm 214 has a rubber pad attached to its side that contacts rubber sleeve 22.

Specifically, since in the above embodiment, the rubber sleeve 22 needs to be deformed greatly to seal the openings at the two ends, this results in that the iris diaphragm 214 needs to apply a large extrusion force to the rubber sleeve 22, so as to avoid damage to the rubber sleeve 22; in this embodiment, by disposing a rubber pad on the side surface of the iris 214, which contacts with the rubber sleeve 22, when the iris 214 presses the rubber sleeve 22 to close the two ends of the rubber sleeve, the rubber pad directly contacts with the surface of the rubber sleeve 22, so as to protect the rubber sleeve 22 from damage.

Still further, the mounting rings 211 are each provided with a stopper for restricting the rubber bush 22.

Still further, the limiting member includes a limiting ring 26, and the limiting ring 26 is in threaded connection with the mounting ring 211.

Specifically, when different water bodies are sampled, as the pH value and the like of the water bodies are too large, such as water samples in different treatment procedures in a sewage treatment plant, the pH value, heavy metals and organic matter content of the water samples are different, the rubber sleeve 22 needs to be cleaned when the water bodies are sampled, so that the mutual interference of the pH value, the heavy metals and the organic matter in different treatment tanks is avoided, the deviation of the detection result of the obtained samples is too large, and in the specific sampling process, more purified water is carried for cleaning the rubber sleeve 22, so that the convenience is brought; in this embodiment, the rubber sleeve 22 is detachably mounted on the first ring and the second ring through the limiting member, the limiting member comprises a limiting ring 26, the limiting ring is in threaded connection with the first ring or the second ring, as shown in fig. 3, the limiting ring 26 is in contact with the upper end face of the first ring, the upper end of the rubber sleeve 22 is pressed on the upper end face of the first ring, the other limiting ring 26 is in contact with the lower end face of the second ring, the lower end of the rubber sleeve 22 is pressed on the lower end face of the second ring, and therefore the rubber sleeve 22 can be detached by screwing down the limiting ring 26, and when sampling is performed, excessive purified water can be prevented from being carried by changing the mode of the rubber sleeve 22.

In still another embodiment of the present invention, the limiting ring 26 is provided with a pressing ring 261, and the mounting rings 211 are provided with annular grooves matched with the pressing ring 261.

Specifically, since the iris valve needs to be pressed to deform greatly at two ends of the rubber sleeve 22 when the iris valve is closed, and is limited by the elastic telescopic rod 23, when the iris piece 214 presses the rubber sleeve 22 from the original state to the state that the two ends of the rubber sleeve 22 are sealed, the ends of the rubber sleeve 22 will be pulled, and in the original state, that is, the cylindrical shape described in the above embodiment, only the two ends of the rubber sleeve 22 are respectively pressed on the first ring and the second ring by the limiting ring 26, in order to avoid that the two ends of the rubber sleeve 22 are separated from the first ring and the second ring, in this embodiment, the limiting ring 26 is fixedly connected with the pressing ring 261, as shown in fig. 5, annular grooves are formed on the first ring and the second ring, and the annular grooves are respectively formed on the upper end surface of the first ring and the lower end surface of the second ring, so that the ends of the rubber sleeve 22 can be pressed in the corresponding annular grooves when the two ends of the rubber sleeve 22 are fixed.

Further, the rubber boot 22 has a bell mouth at both the upper and lower ends.

Specifically, in order to further facilitate the installation of the rubber sleeve 22, the limiting ring 26 fixes the rubber sleeve 22 through the compression ring 261, in this embodiment, the upper end and the lower end of the rubber sleeve 22 are both provided with a bell mouth, so that the end of the rubber sleeve 22 can be directly paved on the surface of the first ring or the second ring when the rubber sleeve 22 is installed, and the end of the rubber sleeve 22 does not need to be manually propped open in the process of screwing the limiting ring 26 with the first ring or the second ring, so that the rubber sleeve 22 is more convenient to replace.

Furthermore, the water pumping assembly 3 is a centrifugal pump 31 fixedly connected to the frame 1, a water inlet end of the centrifugal pump 31 is connected to a water outlet 221 formed in the rubber sleeve 22 through a pipe 32, and a second electric push rod 27 for driving the two mounting rings 211 to approach each other is installed between the two mounting rings 211.

Specifically, in the above embodiment, in order to make the sample preparation device have a continuous sampling function, a submersible pump is installed on one of the installation rings 211, since the submersible pump is directly immersed in the sewage, and needs to be cleaned after sampling is completed, in this embodiment, a centrifugal pump 31 is adopted as the pumping assembly 3, the centrifugal pump 31 is installed on the frame body 1, and a second electric push rod 27 is disposed between the two installation rings 211 to drive the two installation rings 211 to approach each other, the second electric push rod 27 is fixed on the first ring, and the output end of the second electric push rod 27 is fixedly connected on the second ring, in the sampling process, when the iris valve is closed to intercept the water sample to be extracted in the rubber sleeve 22, the second electric push rod 27 disposed between the two installation rings 211 is shortened, the second ring is pulled to approach the first ring, and the intercepted water in the rubber sleeve 22 is made to enter the pipeline 32 by utilizing the extrusion of the two iris valves, so as to meet the requirement of filling water into the water pipe when the centrifugal pump 31 is used, and the water in the rubber sleeve 22 can be pumped into the storage 11 after the centrifugal pump 31 is started.

In another embodiment of the present invention, the compression ring 261 is in a shape of a hollow truncated cone, and a truncated cone surface with a small diameter of the compression ring 261 is connected with the stop collar 26, and the compression ring 261 is made of rubber.

Specifically, in the above embodiment, the rubber sleeve 22 cannot be in a tight state, so that the rubber sleeve 22 is subject to the action of water resistance in the submergence process and swings, thereby excessively disturbing water, in order to avoid the situation that the rubber sleeve 22 is excessively disturbing water in the submergence process to the depth to be sampled, in this embodiment, the compression ring 261 is in a hollow circular truncated cone shape, the circular table surface with a small diameter is connected with the limiting ring 26, and the compression ring 261 is made of rubber material with deformation capability, as shown in fig. 6 and 7, when the limiting ring 26 is installed, the circular truncated cone surface with a large diameter of the compression ring 261 presses one end of the rubber sleeve 22 on the first ring or the second ring, in the process that the limiting ring 26 rotates, as the compression ring 261 is made of rubber material, the limiting ring 26 gradually approaches to the first ring or the second ring, the compression ring 261 is extruded and deformed to the state shown in fig. 7 from the state shown in fig. 6, in this process, the diameter of the position where the compression ring 261 is in contact with the rubber sleeve 22 in advance is deformed, and the end of the rubber sleeve 22 is pulled to the outer side of the limiting ring 26, as shown in fig. 6, thereby the rubber sleeve 22 is pulled, the best effect of the compression ring 22 can be further expanded, and the best effect of the deformation can be achieved when the compression ring 22 is required to be installed, and the best deformation effect of the compression ring 22 is required to be increased, and the best deformation effect is realized, and the compression ring 22 is required to be installed, and is realized.

Further, the compression ring 261 is rotatably connected with the stop collar 26 by a connecting ring 262.

Specifically, in order to avoid that the compression ring 261 follows the stop collar 26 and rotates synchronously, the torsion applied by the compression ring 261 to the rubber sleeve 22 causes damage to the rubber sleeve 22, in this embodiment, the round table surface with smaller diameter on the compression ring 261 is fixedly connected on the connecting ring 262, the connecting ring 262 is rotationally connected with the stop collar 26, and the compression ring 261 is connected with the stop collar 26 through the connecting ring 262, so that the compression ring 261 cannot follow the stop collar 26 to rotate, and the rubber sleeve 22 is prevented from being damaged due to torsion.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the invention, which is defined by the appended claims.

Claims (4)

1. The utility model provides a high-efficient sample preparation facilities in environment water sample, includes the support body, has placed a plurality of storage bottle on the support body, its characterized in that still includes:

the sampling assembly comprises a container with openings at two ends, and electric control plugging pieces are arranged at two ends of the container;

The driving mechanism is used for driving the sampling assembly to move along the length direction of the sampling assembly;

the blocking piece comprises an iris valve and a driving piece for driving the iris valve to open and close;

The iris valve comprises a mounting ring, the mounting ring is rotationally connected with a toothed ring, the inner side of the mounting ring is rotationally connected with a plurality of iris diaphragms through a rotating shaft, the plurality of iris diaphragms are distributed in a circumferential array by taking the axis of the mounting ring as the center, the rotating shaft is sleeved with a first gear, the first gear is meshed with the inner side of the toothed ring, the outer side of the mounting ring is rotationally connected with a second gear, the second gear is meshed with the outer side of the toothed ring, the container is a cylindrical rubber sleeve, two ends of the rubber sleeve are respectively fixedly connected with the mounting rings of the two iris valves, the two mounting rings are fixedly connected through connecting pieces, one end of the rubber sleeve penetrates through the inner side of one group of the mounting rings and is connected with the mounting rings, the other end of the rubber sleeve penetrates through the inner side of the other group of the mounting rings and is connected with the other group of the mounting rings, the mounting ring is provided with a limiting part for limiting the rubber sleeve, the limiting part comprises a limiting ring, the limiting ring is in threaded connection with the mounting ring, the limiting ring is provided with a pressing ring, the mounting ring is provided with an annular groove matched with the pressing ring, the pressing ring is in a hollow round table shape, a round table surface with small diameter is connected with the limiting ring, the pressing ring is made of rubber materials with deformation capability, when the limiting ring is mounted, one end of the rubber sleeve is pressed on one group of mounting rings or the other group of mounting rings by the round table surface with large diameter, and in the process of rotation of the limiting ring, the diameter of the position of the pressing ring, which is in contact with the rubber sleeve, is enlarged in advance and pulls the rubber sleeve to deform, and the end part of the rubber sleeve is pulled to the outer side of the limiting ring.

2. The sample preparation device of claim 1, further comprising a pumping assembly for pumping water from the container into the storage bottle.

3. The sample preparation device of any one of claims 1 or 2, wherein the driving member comprises a driving motor and a driving rod, a limiting guide bar is fixed on the side wall of the driving rod, and two ends of the driving rod respectively pass through the middle parts of a group of second gears.

4. The sample preparation device of claim 1, wherein a rubber pad is attached to each of the iris diaphragm contacting sides of the rubber sleeve.