A fluid sampler and its sampling component

Abstract

The present invention discloses a fluid sampler and a sampling assembly. The stopper clamp of the sampler is located outside the end face through-hole of the outer housing so as to switch between an open working position and a closed working position relative to the outer housing. A stopper mounting portion is provided on the stopper clamp; an elastic reset member is disposed between the outside of the stopper clamp and the outer housing to provide a reset acting force for the stopper clamp to switch to the closed working position; a transmission member can switch between an open working position and a closed working position relative to the outer housing, and a detachable engaging and limiting pair is provided between the transmission member and the stopper clamp. When the transmission member switches to the open working position, the stopper clamp can be held at the open working position through the engaging and limiting pair; when the transmission member switches to the closed working position, the engaging and limiting pair disengages so that the stopper clamp switches to the closed working position. The sampling process is completed in the fluid, and the sample can well represent the fluid in the environment at the target depth. Applying this solution can effectively reduce the production and use costs on the basis of obtaining good detection accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of underground fluid sample sampling, and particularly relates to a fluid sampler and its sampling assembly. Background Art

[0002] Groundwater sampling is mainly used for environmental monitoring, such as but not limited to fields such as environmental remediation. By detecting the groundwater quality through the collected samples, pollutants can be determined and the remediation effect of pollutants can be traced. As is well known, sampling is mainly divided into two methods: active and passive. In the active method, most often a water storage device or a pump is used to collect groundwater at the target depth to the ground, and after being filled into a sampling bottle, it is sent to the laboratory. In the actual application process, it consumes a high amount of human and material resources, generates solid and liquid wastes, and will also cause a certain degree of disturbance to the target fluid. Currently, the most advanced active sampling technology is called the low-speed pump sampling method. Compared with other direct sampling methods using water storage devices (Bailer tubes), the obtained samples can relatively accurately represent the target fluid. However, the main defects are in addition to the high human and material resources and waste generation, the representativeness of the samples to the target fluid depends on the groundwater environment and the distribution of pollutants. Therefore, in comparison, the passive sampling method can overcome these difficulties.

[0003] The passive method uses natural methods to enable the sample to enter the sampler, specifically including direct physical loading, membrane penetration, and adsorption, etc. Among them, membrane penetration and adsorption have restrictive requirements for the substances to be measured. For example, they need to be organic substances or volatile substances, etc. A typical pure physical passive sampler in the prior art can effectively overcome the problem of restrictions on the substances to be measured. Please refer to Figure 1 ... When specifically operating, a sampling bottle with upper and lower openings is placed at the target depth of the groundwater, and a pneumatic actuator is used to activate the mechanism to close the bottle mouth to complete the sampling. However, due to its own structural limitations, the following deficiencies exist in this solution:

[0004] First, the spring 45 connecting the two bottle stoppers is inserted through the bottle body 20. When the mechanism is activated, the bottle stoppers are closed inward under the action of the spring 45 at the upper and lower bottle mouths 25, 30. The presence of foreign objects in the sample directly affects the target fluid. Even if the spring is wrapped with polytetrafluoroethylene, there is a risk of falling off and contaminating the sample after long-term use. In particular, polytetrafluoroethylene is regarded as an unusable material when collecting certain fluorine-containing samples.

[0005] Second, if the sampling bottle is directly sent to the laboratory, the bottle stoppers and the spring 45 are regarded as non-recyclable solid wastes, and the production and use costs are high.

[0006] Third, the upper and lower bottle stoppers must be thickened and specially designed (the hook 80 is used to hook the spring 45). In addition to the relatively high production and use costs, the difficulty of laboratory testing increases and the accuracy decreases.

[0007] Fourth, before tightening the external bottle cap (not shown in the figure), the operator needs to cut off the excess parts 50 and 55 on the bottle stopper (used to engage with the mechanism), which increases the probability of damage to the sample tightness and also increases the sampling time and complexity. In addition, there is a risk of unqualified samples due to unevenly cut bottle stoppers.

[0008] Fifth, based on the design of the spring and the bottle stopper, the corresponding transmission parts 240 on the back of multiple bottle bodies 20 of the device need to be designed to expand and contract in the opposite directions up and down, which is relatively complex in structure, high in production cost, and increases the risk of damage.

[0009] In view of this, it is urgent to optimize the design of the existing grinding machine production equipment to overcome the above technical defects. Summary of the Invention

[0010] To solve the above technical problems, the present invention provides a fluid sampler and a sampling assembly with an optimized structure to overcome the defects of the prior art, and can effectively reduce the production and use costs on the basis of obtaining good detection accuracy.

[0011] The fluid sampler provided by the present invention includes: an external housing, the bottle body accommodating cavity of which has an end surface through port corresponding to the bottle mouth of the sampling bottle; a bottle stopper clamp, located outside the end surface through port of the external housing, and configured to switch between an open working position and a closed working position relative to the external housing, the bottle stopper clamp is provided with a bottle stopper mounting portion, and is configured to: the bottle stopper provided on the bottle stopper clamp in the closed working position is hermetically adapted to the bottle mouth of the sampling bottle; an elastic reset member, disposed between the outside of the bottle stopper clamp and the external housing, and configured to: when the bottle stopper clamp switches to the open working position, the elastic reset member is deformed by force and stores elastic deformation energy, and can release the deformation energy to provide a reset acting force for the bottle stopper clamp to switch to the closed working position; a transmission member, which can switch between an open working position and a closed working position relative to the external housing, and there is a detachable engagement and limit pair between the transmission member and the bottle stopper clamp, and is configured to: when the transmission member switches to the open working position, the bottle stopper clamp can be held in the open working position through the engagement and limit pair; when the transmission member switches to the closed working position, the engagement and limit pair is disengaged so that the bottle stopper clamp switches to the closed working position.

[0012] Preferably, there are two end surface through ports arranged opposite to each other in the first direction, respectively corresponding to the two bottle mouths of the sampling bottle, and the bottle stopper clamp and the elastic reset member are both correspondingly provided with two; the first direction is perpendicular to the plane where the end surface of the external housing is located.

[0013] Preferably, the transmission member has a rod body built in the surface chute of the outer housing and can linearly displace in the chute in a first direction to switch between an open working position and a closed working position relative to the outer housing; and the cross-sections of both the chute and the rod body are non-circular.

[0014] Preferably, the cork pliers include a bottom plate and jaws located at the outer edge of the bottom plate, and the jaws form the cork mounting portion; the elastic reset member is a torsion spring, and the two working ends of the torsion spring are respectively connected to the outer surface of the outer housing and the outer surface of the bottom plate; a central shaft is inserted through the spring coil hole of the torsion spring, and the end of the central shaft is pivotally connected to the body of the outer housing so that the cork pliers can rotate relative to the outer housing to switch between an open working position and a closed working position.

[0015] Preferably, a spring fixing seat is provided on the outer surface of the bottom plate, and a spring transverse fixing hole parallel to the plate surface of the bottom plate is opened on the spring fixing seat, and the corresponding working end of the torsion spring is inserted and connected to the spring transverse fixing hole.

[0016] Preferably, a support rod is provided on one of the end of the rod body of the transmission member and the bottom plate of the cork pliers, and an insertion hole is provided on the other, and the support rod and the insertion hole form the detachable engaging and limiting pair.

[0017] Preferably, the support rod is bent and extended from the rod body of the transmission rod, and the bending directions of the two support rods at both ends are the same; the insertion hole is opened on a vertical plate provided on the bottom plate of the cork pliers.

[0018] Preferably, the vertical plate is located on the bottom plate on the side of the spring fixing seat near the central shaft, and a spring vertical fixing hole is also opened on the vertical plate so that the corresponding working end of the torsion spring can be inserted and connected to the spring transverse fixing hole through the spring vertical fixing hole opened on the vertical plate.

[0019] Preferably, when the cork pliers are in the open working position, the insertion hole on the vertical plate is arranged in the first direction.

[0020] Preferably, the transmission member has a sliding portion located above the end face through hole, and the sliding portion can slide and displace relative to the outer housing in a second direction to switch between an open working position and a closed working position relative to the outer housing, and the second direction is parallel to the plane where the end face of the outer housing is located.

[0021] Preferably, a transition member is fixedly provided on the outer housing. The transition member has a sliding adaptation portion arranged in the second direction. The sliding portion can slide relative to the outer housing in the second direction on the sliding adaptation portion. And the cork pliers include a bottom plate and jaws located at the outer edge of the bottom plate. The jaws form the cork mounting portion. A compression spring guide cylinder is arranged on the surface of the bottom plate on the opposite side of the jaws in the first direction. And the transmission member has an engaging portion arranged in the first direction from the sliding portion to form an engaging limit pair with the compression spring guide cylinder. The elastic reset member is a compression spring placed in the compression spring guide cylinder and is pressed between the sliding adaptation portion of the transition member and the bottom plate of the cork pliers.

[0022] Preferably, a catch hook is arranged on one of the engaging portion of the transmission member and the outer surface of the compression spring guide cylinder, and a bayonet is arranged on the other. The catch hook and the bayonet form the detachable engaging limit pair.

[0023] Preferably, one end of the sliding adaptation portion of the transition member has a stop portion arranged in the first direction. A trigger elastic member is arranged on the sliding adaptation portion between the stop portion and the sliding portion. And the other side of the sliding portion can be pressed against the trigger portion and is configured to: when the trigger portion presses against the sliding portion, the trigger elastic member is deformed by force and stores elastic deformation energy, and can release the deformation energy to provide a reset acting force for the sliding portion to switch to the closed working position.

[0024] Preferably, an inner wall on one side of the outer housing has a supporting portion extending inward. In the projection plane perpendicular to the first direction, the inner edge contour of the supporting portion is located outside the outer contour of the bottleneck of the sampling bottle.

[0025] The present invention also provides a fluid sampling assembly, including at least two fluid samplers, characterized in that the fluid sampler is as described above. It further includes a trigger member and a sampler connecting member arranged between the outer housings of adjacent fluid samplers. The sampler connecting member is detachably connected to both of the two outer housings. The trigger portion of the trigger member is connected to one of the transmission members. The adjacent transmission members arranged opposite to each other in the first direction are connected by a pulling cable to synchronously switch to the closed working position under the action of the trigger member.

[0026] Preferably, it further includes a trigger member fixing member for mounting the trigger member. The trigger member fixing member is detachably connected to the outer housing of the fluid sampler located on the outer side in the first direction. The trigger portion of the trigger member is connected to the transmission member of the outer fluid sampler.

[0027] Preferably, both the sampler connecting piece and the trigger component fixing piece are circumferentially incompletely closed housing structures; wherein, the sampler connecting shell and the trigger component fixing shell are respectively sleeved outside the outer shell of the corresponding fluid sampler, and there is a detachable fitting pair between the upper and lower ends of the outer shell of the fluid sampler and the corresponding sampler connecting shell and / or the trigger component fixing shell.

[0028] Preferably, the end of the outer shell is provided with a convex block extending outward, and locking grooves are respectively formed on the sampler connecting shell and / or the trigger component fixing shell. The locking groove has an insertion section and a locking section which are communicated. The insertion section extends along the first direction to the edge of the corresponding housing structure, and the locking groove and the convex block form the detachable fitting pair.

[0029] This solution creatively proposes a fluid sampler based on a sampling bottle. Specifically, the bottle stopper is placed in the bottle stopper mounting part of the bottle stopper pliers, and the bottle stopper pliers are used to realize the pre-fixing of the bottle stopper by clamping, and the engagement and limit pair between the transmission part and the bottle stopper pliers is used to keep it in the open working position; in this state, the elastic reset part between the outside of the bottle stopper pliers and the outer shell deforms and stores energy. When the transmission part switches to the open working position, the engagement and limit pair between the transmission part and the bottle stopper pliers disengages. At the same time, the elastic reset part releases the deformation energy to provide a reset force for the bottle stopper pliers to switch to the closed working position. In the closed state, the bottle stopper is hermetically adapted to the sampling bottle mouth, and the fluid in the bottle is the sampled sample. The sampling bottle can be taken off from the outer shell and sent for inspection. Compared with the prior art, this solution has the following beneficial technical effects:

[0030] First of all, the elastic reset part that provides the closing reset force for the bottle stopper pliers in this solution is located between the outside of the bottle stopper pliers and the outer shell, that is, outside the sampling bottle; this setting can, on the one hand, completely avoid the possibility of the reset spring contaminating the sample inside the sampling bottle; at the same time, this elastic reset part is reused multiple times with the outer shell, the bottle stopper pliers and the outer shell, which can effectively reduce the production and use costs.

[0031] Secondly, this solution uses the bottle stopper pliers to realize the pre-fixing of the bottle stopper by clamping. During operation, the bottle stopper is placed in the bottle stopper mounting part of the bottle stopper pliers, and no material removal treatment is required during the process. It has good operability and can greatly reduce the sampling time; at the same time, when resetting, the force is provided by the elastic reset part corresponding to the bottle stopper pliers, which provides a good technical guarantee for ensuring the tightness of the sample, thereby reducing the risk of unqualified samples.

[0032] Thirdly, based on the characteristics of pre-fixing by clamping, the structure and size of the bottle stopper do not need to be thickened or specially designed, which can further reduce the production and use costs and has good detection operability.

[0033] Finally, based on the setting of the detachable clamping and limiting pair, for the sampling bottle with upper and lower bottle mouths, the transmission part in this solution can be switched to the closed working position by a single-direction action. It has the characteristics of simple structure and controllable production and manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a schematic diagram of a typical purely physical passive sampler in the prior art;

[0035] Figure 2 is a schematic diagram of the overall structure of the sampling bottle described in the specific embodiment;

[0036] Figure 3 is a perspective view of the open working state of the fluid sampler described in Embodiment 1;

[0037] Figure 4 is Figure 3 a schematic diagram of the external housing shown in;

[0038] Figure 5 is Figure 3 the view from direction A of;

[0039] Figure 6 is Figure 3 a schematic diagram of the state after sampling of the fluid sampler shown in;

[0040] Figure 7 is an exploded assembly view of the fluid sampler described in Embodiment 1;

[0041] Figure 8 is a schematic diagram of the assembly relationship between the bottle stopper, the bottle stopper pliers and the elastic reset member described in Embodiment 1;

[0042] Figure 9 is a schematic diagram of the overall structure of the fluid sampling assembly described in Embodiment 1;

[0043] Figure 10 is Figure 9 an exploded assembly view of the fluid sampling assembly shown in;

[0044] Figure 11 is a schematic diagram of the open state of some components of the fluid sampler described in Embodiment 2;

[0045] Figure 12 is Figure 11 a schematic diagram of the closed state of some components shown in.

[0046] Figures 3 - 10 In:

[0047] Sampling bottle 11, upper bottle stopper 12, bottom of bottle stopper 12-1, sealing ring 12-2, top of bottle stopper 12-3, lower bottle stopper 13, upper bottle cap 14, lower bottle cap 15; outer housing 2, bottle body accommodating cavity 2-1, end face through hole 2-2, supporting part 2-3, sliding groove 2-4, pivot hole 2-5, convex block 2-6; upper bottle stopper clamp 31, lower bottle stopper clamp 32, clamping jaw 3-1, bottom plate 3-2, vertical plate 3-3, insertion hole 3-3-1, spring vertical fixing hole 3-3-2, spring fixing seat 3-4, spring horizontal fixing hole 3-4-1; upper torsion spring 41, lower torsion spring 42; transmission part 5, rod body 5-1, upper support rod 5-2, lower support rod 5-3; central shaft 6; gas spring 7, telescopic rod 71, pulling cable 72; sampler connection shell 8, upper locking groove 8-1, lower locking groove 8-2; pulling cable 9, trigger part fixing shell 10, locking groove 10-1;

[0048] Figures 11 - 12 In:

[0049] Transition piece 2-7', sliding adaptation part 2-7-1', stop part 2-7-2', upper bottle stopper clamp 31', lower bottle stopper clamp 32', compression spring guide tube 3-1', upper compression spring 41', lower compression spring 42', transmission part 5', sliding part 5-1', engaging part 5-2', trigger elastic part 6'. Specific implementation mode

[0050] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0051] The passive fluid sampler provided in this embodiment places an open sampling bottle in the fluid at the target position. After the fluid is stable, the bottle mouth can be triggered to close by a mechanism and then taken out directly for inspection. The core of this solution is that the elastic reset part for providing the closing force is located outside the bottle stopper clamp, and the bottle stopper only has a single function of sealing the bottle mouth; therefore, after the bottle mouth of the sampling bottle is sealed and adapted by the bottle stopper, there are no other foreign objects in the bottle that may affect the test results.

[0052] Specifically, the fluid sampler mainly includes an outer housing, a stopper clamp, an elastic reset member, and a transmission member. Among them, the bottle body accommodating cavity of the outer housing has an end surface through port corresponding to the bottle mouth of the sampling bottle; the stopper clamp is located outside the end surface through port of the outer housing and is configured to switch between an open working position and a closed working position relative to the outer housing. The stopper clamp is provided with a stopper mounting portion and is configured such that the stopper provided on the stopper clamp in the closed working position is hermetically adapted to the bottle mouth of the sampling bottle; among them, the elastic reset member is placed between the outside of the stopper clamp and the outer housing and is configured such that when the stopper clamp switches to the open working position, the elastic reset member is deformed under force and stores elastic deformation energy, and can release the deformation energy to provide a reset acting force for the stopper clamp to switch to the closed working position; among them, the transmission member can switch between an open working position and a closed working position relative to the outer housing, and there is a detachable engagement and limiting pair between the transmission member and the stopper clamp, and is configured such that when the transmission member switches to the open working position, the stopper clamp can be held in the open working position through the engagement and limiting pair. When the sampling bottle is placed in the fluid at the target position, the transmission member is used to keep the stopper and the stopper clamp in the open state; when the transmission member switches to the closed working position, the engagement and limiting pair is disengaged so that the stopper clamp switches to the closed working position. During the process, the elastic reset member located outside the sampling bottle provides the disengagement of the engagement and limiting pair, and the stopper can be tightly closed on the bottle mouth and maintain airtightness. In this way, the non-disturbing sampling process is completed in the fluid, and the collected sample can well represent the fluid in the environment at the target depth.

[0053] Without loss of generality, the following embodiments will respectively use the sampling bottle with double bottle mouths shown in the figure as the description subject, and will detail the composition and configuration relationship of the passive fluid sampler, as well as the corresponding operating components. Combining Figure 2 As shown, the two bottle mouths of the sampling bottle shown in the figure are arranged vertically opposite to each other, and are respectively provided with a stopper and a bottle cap. Among them, the stopper and the tightening method are hermetically adapted to the bottle mouth, and the bottle cap can be screwed tightly and hermetically adapted to the external thread of the bottle mouth with an internal thread.

[0054] Under different sampling environmental conditions, if it is necessary to add sample preservation solutions, such as hydrochloric acid solution and ascorbic acid, it can be injected from the bottle cap with a syringe. The upper and lower bottle caps are standard headspace vial caps for testing, and the upper and lower stoppers are made of elastic inert materials. It should be understood that the bottle cap does not constitute a substantial limitation to the technical solution claimed in the present application. During actual sampling operations, the bottle cap can be selectively used without affecting the cleanliness of the sample.

[0055] It should be noted that the orientation terms "upper" and "lower" used in this text are defined based on the relative positional relationship of the components shown in the figures. Of course, in the actual downhole application state, the fluid sampler is not limited to the absolute vertical posture shown in the figures; in addition, the orientation terms "outer" and "inner" used in this text are defined with the sampling bottle as the reference. It can be understood that the use of the above orientation terms is only for clearly explaining the dynamic cooperation relationship between the components.

[0056] Embodiment 1:

[0057] Please refer to Figure 3 , which shows the open working state of the fluid sampler described in this embodiment.

[0058] The external housing 2 of the sampler serves as a basic component for placing the sampling bottle 11 and is also used for assembling components such as the bottle stopper pliers (upper bottle stopper pliers 31 and lower bottle stopper pliers 32) and the elastic reset members (upper elastic reset member 41 and lower elastic reset member 42). As shown in the figure, the bottle body accommodating cavity 2-1 of the external housing 2 has end face through holes 2-2 corresponding to the bottle mouth of the sampling bottle 11. Here, the two end face through holes 2-2 are arranged opposite to each other in the first direction X to establish a channel for threading the bottle mouth and / or inserting the bottle stopper (12, 13). Among them, the first direction is perpendicular to the plane of the end face of the external housing 3, that is, it is generally consistent with the length direction of the sampling bottle body.

[0059] One inner wall of the external housing 2 has a supporting portion 2-3 extending inward. In the projection plane perpendicular to the first direction, the inner edge contour of the supporting portion 2-3 is located outside the outer contour of the bottleneck of the sampling bottle 11; that is to say, the sampling bottle 11 can be inserted into the bottle body accommodating cavity 2-1 of the external housing 2 from the other side without the supporting portion 2-3, and the supporting portion 2-3 forms a limit for the bottle shoulder of the sampling bottle 11, preventing the sampling bottle 11 from slipping out while not affecting the normal closing operation of the bottle mouth.

[0060] Correspondingly, the upper bottle stopper pliers 31 and the lower bottle stopper pliers 32 are respectively located outside the corresponding end face through holes 2-2 of the external housing 2 to switch between the open working position and the closed working position relative to the external housing 2. Please refer to Figure 3 and Figure 5 shown in Figure 5 is Figure 3 the schematic diagram of the open working state shown in the A direction of Figure 6 . Among them, the upper bottle stopper pliers 31 and the lower bottle stopper pliers 32 are provided with bottle stopper mounting portions (3-1), and the specific configuration is as follows: the upper bottle stopper 12 provided on the upper bottle stopper pliers 31 in the closed working position is hermetically adapted to the upper bottle mouth of the sampling bottle 11, and the lower bottle stopper 13 provided on the lower bottle stopper pliers 32 is hermetically adapted to the lower bottle mouth of the sampling bottle 11. Please refer to Figure 6 which Figure 6 shows the state of the fluid sampler after sampling, that is, the closed working state.

[0061] The elastic reset member of the present invention is also provided with two elastic reset members. The upper elastic reset member (41) is placed between the outer portion of the upper bottle plug clamp 31 and the outer shell 2, and the lower elastic reset member (42) is placed between the outer portion of the lower bottle plug clamp 32 and the outer shell 2. The specific configuration is as follows: when the bottle plug clamp is switched to Figure 5 When the working position is opened, the corresponding elastic reset member is deformed by force and stores elastic deformation energy, and can release the deformation energy to provide the corresponding bottle plug clamp to switch to Figure 6 The reset force of the closed working position shown. In this solution, the elastic reset member is placed outside the sampling bottle 11, which can completely avoid the possibility of the reset spring being placed inside the sampling bottle and contaminating the sample; at the same time, the elastic reset member and the external shell, the bottle plug clamp and the external shell can be reused many times, which can greatly reduce the use cost.

[0062] The transmission member 5 is a transmission member for the closing force of the bottle mouth, and can be switched between the open working position and the closed working position relative to the external shell 2, and the upper and lower ends of the transmission member 5 and the upper bottle plug clamp 31 and the lower bottle plug clamp 32 respectively form a detachable engagement limit pair. The specific configuration is as follows: the transmission member 5 switches to the open working position. Figure 3 In the working position shown in FIG. 1 , the upper bottle plug clamp 31 and the lower bottle plug clamp 32 are respectively kept in the open working position by corresponding engaging limit pairs; the transmission member 5 is switched to Figure 6 When the closed working position is shown, the engaging limit pair is disengaged so that the upper bottle plug clamp 31 and the lower bottle plug clamp 32 are respectively switched to the closed working position. In other words, for the double-mouth sampling bottle 2, the transmission member 5 can switch the upper and lower bottle plug clamps to the closed working position synchronously by a single direction movement, and the structure is simpler and more reasonable.

[0063] As mentioned above, the present solution is described as a preferred example of, but not limited to, a sampling bottle configuration with two upper and lower bottle openings. Theoretically, sampling can also be completed if the bottle opening is set to one (upper opening), and the corresponding components can be configured in one according to the adaptation relationship. In comparison, the configuration of the upper and lower bottle openings is conducive to the full mixing of the fluid flowing into the bottle body from the bottom.

[0064] In order to simplify the structure while meeting the basic functions and reasonably control the production and processing costs of the components, the upper bottle plug clamp 31 and the lower bottle plug clamp 32 can be further optimized. Figure 7 and Figure 8 ,in, Figure 7 This is an exploded view of the assembly of the fluid sampler described in this embodiment. Figure 8 The figure shows the assembly relationship between the bottle stopper, the bottle stopper pliers and the elastic reset member.

[0065] In this solution, the cork pliers (31, 32) include a base plate 3-2, and clamping jaws 3-1 are arranged at the outer edge of the base plate 3-2. The clamping jaws 3-1 are used to form a cork installation part for clamping and placing the cork. During specific use, the upper cork 12 is placed at the position of the clamping jaws of the upper cork pliers 31, and the lower cork 13 is placed at the position of the clamping jaws of the lower cork pliers 32. As shown in the figure, three clamping jaws 3-1 are arranged at intervals to reliably clamp and fix the cork. It should be noted that the number of the clamping jaws 3-1 is not limited to the three shown in the figure, and as long as it can meet the functional requirements of reliable clamping and fixing, it is within the scope of protection requested in this application.

[0066] In addition, the cork installation part is not limited to the form of the clamping jaws shown in the figure. In fact, a quick-release auxiliary tool can also be used, as long as it can meet the requirements of detachable pre-installation and fixing of the cork.

[0067] In this solution, the transmission member 5 needs to have a relative displacement relative to the external housing 2 after being triggered by an external force to reliably achieve the operation of closing the bottle mouth. To further obtain good actuation performance, preferably, the transmission member 5 adopts a rod structure. A chute 2-4 is provided on the outer surface of the external housing 2 along the first direction X. The middle rod body 5-1 of the transmission member 5 is placed in the chute 2-4 on the surface of the external housing 2 and can linearly displace along the first direction X in the chute 2-4 to switch between the open working position and the closed working position relative to the external housing 2. Moreover, the cross-sections of both the chute 2-4 and the middle rod body 5-1 of the transmission member 5 are not circular. With such a setting, based on the guiding effect of the chute 2-4 on the rod body 5-1, it can be ensured that the switching of the working position of the transmission member 5 is carried out stably on a predetermined track without torsion.

[0068] It can be understood that the detachable engaging and limiting pair needs to be assembled by the operator before the sampling operation, and its operability can be ensured through structural design. Upper support rods 5-2 and lower support rods 5-3 are respectively arranged at the upper and lower ends of the rod body 5-1 of the transmission member 5. Correspondingly, insertion holes 3-3-1 are respectively arranged on the base plates 3-2 of the upper cork pliers 31 and the lower cork pliers 32. Thus, the above-mentioned detachable engaging and limiting pair is constructed through the support rods (5-2, 5-3) and the insertion holes 3-3-1, which is easy to assemble and can be quickly detached.

[0069] Specifically, both the upper support rod 5-2 and the lower support rod 5-3 are bent and extended from the rod body 5-1 of the transmission rod 5, and the bending directions of the upper support rod 5-2 and the lower support rod 5-3 at the two ends are the same, so that they can be detached synchronously with the switching displacement of the transmission member 5. Preferably, the insertion holes 3-3-1 are opened on the vertical plates 3-3 arranged on the base plates 3-2 of the cork pliers and are configured as follows: the cork pliers are located at Figure 8When the shown open working position is in place, the center line of the insertion hole 3-3-1 is arranged along the first direction. Thus, when the transmission member 5 is triggered, the upper support rod 5-2 and the lower support rod 5-3 at the rod end thereof can be disengaged from the corresponding insertion holes more smoothly and quickly.

[0070] Of course, the adapted support rod and the insertion hole can also be arranged in the reverse direction (not shown in the figure), that is, the insertion hole is arranged on the side of the transmission member 5, and the support rod is arranged on the side of the bottom plate. Similarly, the function requirements of assembly and disengagement can be met by using the rod-hole insertion structure.

[0071] Furthermore, in this solution, the upper and lower elastic reset members are preferably torsion springs: the upper torsion spring 41 and the lower torsion spring 42. Based on the characteristic that the upper and lower torsion springs have the same associated adaptation principle with corresponding bottle cork pliers, etc., only the Figure 8 upper torsion spring 41 shown in the figure will be described in detail here.

[0072] As shown in the figure, the two working ends of the upper torsion spring 41 are respectively connected to the outer surface of the outer housing 2 and the outer surface of the bottom plate 3-2 of the upper bottle cork plier 41. In an ideal state, the torsion spring has a pre-deformation amount after assembly. That is to say, even in the closed working position, the torsion spring also presets a basic pre-deformation amount as needed to ensure reliable completion of the bottle mouth closing operation. Combining Figures 3 - 6 shown, one working end of the upper torsion spring 41 abuts against the outer surface of the outer housing 2. Obviously, compared with the way of placing this working end inside the outer housing 2, the establishment of the working relationship in this solution has the characteristics of simple and reasonable structure and easy maintenance.

[0073] Among them, a central shaft 6 is inserted through the spring coil hole of the upper torsion spring 41, and the end of the central shaft 6 is pivotally connected to the body of the outer housing 2 so that the bottle cork plier can rotate relative to the outer housing to switch between the open working position and the closed working position. Please also combine Figure 5 and Figure 7 shown, pivot holes 2-5 adapted to both ends of the central shaft 6 are respectively arranged on the body of the outer housing 2. According to specific structural requirements, it can also be designed as a single-sided pivot connection. Here, a two-end pivot connection adaptation is preferably adopted for better stability. It can be determined that in addition to being arranged at the end of the outer housing 2 shown in the figure, actually, the pivot hole adapted to the central shaft 6 can also be embedded on the inner wall of the bottle body accommodation cavity 2-1. In comparison, the design with the pivot hole located at the end has lower process costs and is easy to install and subsequent cleaning operations.

[0074] In addition, in order to make full use of the structural space to obtain better product integration, preferably, a spring fixing seat 3-4 may be provided on the outer surface of the bottom plate 3-2. A spring transverse fixing hole 3-4-1 parallel to the plate surface of the bottom plate 3-2 is formed on the spring fixing seat 3-4. The corresponding working end of the upper torsion spring 41 is inserted and connected to the spring transverse fixing hole 3-4-1, ensuring that the working end of the torsion spring closely adheres to the bottom plate of the cork pliers, and providing basic limitation through the spring transverse fixing hole 3-4-1, which can completely avoid the possibility of abnormal opening.

[0075] As shown in the figure, the vertical plate 3-3 is located on the bottom plate 3-2 on the side of the spring fixing seat 3-4 close to the central axis 6, and a spring vertical fixing hole 3-3-2 is also formed on the vertical plate 3-3, so that the corresponding working end of the upper torsion spring 41 can be inserted and connected to the spring transverse fixing hole 3-4-1 through the spring vertical fixing hole 3-3-2 formed on the vertical plate 3-3. Overall, the structure is relatively compact, and there will be no relative displacement and torsion of the working end of the torsion spring.

[0076] In addition to the aforementioned sampler, this embodiment further provides a fluid sampling assembly, including at least two fluid samplers, and independent sealed samples can be obtained respectively through one sampling operation. Please refer to Figure 9 and Figure 10 , where Figure 9 shows the overall structural schematic diagram of the fluid sampling assembly, Figure 10 shows Figure 9 the assembly explosion diagram of the fluid sampling assembly shown in

[0077] The fluid sampling assembly further includes a triggering component, the triggering part of which is connected to one of the transmission parts 5 so that the transmission part 5 can be switched from the open working position to the closed working position. For example but not limited to, the triggering component can adopt a gas spring 7 that uses air pressure to realize the relative movement of the shaft and the piston. Preferably, a tensile gas spring in a normally contracted state is adopted. Specifically, the contraction of its telescopic rod is completed by a steel cable wrapped with a rubber tube. In this solution, the telescopic rod 7-1 of the gas spring 7 can be connected to one of the transmission parts 5 through a pulling cable 7-2, so as to realize the triggering and activation of the contraction to complete the action switching. It should be noted that the gas spring 7 is not the core invention point of this application, and those of ordinary skill in the art can select and match it according to actual needs, so the internal structural details of the gas spring 7 will not be elaborated herein.

[0078] The fluid sampling assembly also includes a sampler connector (8) disposed between the outer shells 2 of adjacent fluid samplers. Specifically, the sampler connector and the two outer shells 2 are detachably connected. At the same time, adjacent transmission members 5 disposed relatively along the first direction X are connected by a pull rope 9 so as to be synchronously switched to the closed working position under the action of the gas spring 7. The pull rope 9 can prevent the absolute rigid connection between the two transmission members 5 from affecting the stable open state of each. As shown in the figure, two samplers are taken as an example. It should be understood that for other multiple fluid samplers with more than two, the specific connection method is similar.

[0079] In addition, the fluid sampling assembly may also include a trigger component fixing member (10) for mounting a trigger component (gas spring 7). As shown in the figure, the trigger component fixing member is detachably connected to the outer shell 2 of the fluid sampler located on the outside along the first direction X. Of course, the telescopic rod 71 (trigger part) of the gas spring 7 is connected to the transmission member 5 of the fluid sampler on the outside, and thereby forms a linkage with all transmission members 5. Here, "located on the outside along the first direction X" is equivalent to the uppermost or lowermost fluid sampler shown in the figure. In this preferred embodiment, the trigger component fixing member 10 is arranged on the outer shell 2 of the uppermost fluid sampler.

[0080] Preferably, the sampler connector and the trigger component fixing member are both circumferentially incompletely closed shell structures, preferably thin-walled elastic shells. On the one hand, it is easy to assemble, and the size of the thin-walled elastic shell can be slightly smaller than the outer shell 2, and it can be assembled after being slightly opened with a little force, which can improve the reliability of the assembly structure to a certain extent.

[0081] The sampler connection shell 8 and the trigger component fixing shell 10 are respectively mounted on the outside of the external shell 2 of the corresponding fluid sampler, and a detachable adapter is provided between the upper and lower ends of the external shell 2 of the fluid sampler and the corresponding sampler connection shell 8 and / or the trigger component fixing shell 10. It is particularly noted that the "detachable adapter" can be implemented in different structural ways, such as but not limited to the preferred protrusion and locking groove in the figure.

[0082] The end of the outer shell 2 is provided with a protrusion 2-6 extending outward, the sampler connecting shell 8 is provided with an upper locking groove 8-1 and a lower locking groove 8-2, and the trigger component fixing shell 10 is also provided with a locking groove 10-1. Figure 9 and Figure 10 The locking adaptation relationship between the upper locking groove 8-1, the lower locking groove 8-2 and the locking groove 10-1 and the corresponding protrusion 2-6 is the same. The locking grooves have an insertion section and a locking section that are connected. The insertion section extends to the edge of the corresponding shell structure along the first direction. During assembly, the protrusion is inserted through the insertion section and then rotated relatively to enter the locking section, so that the above-mentioned detachable adapter pair can be constructed by the locking groove and the protrusion.

[0083] The following is a detailed description of the specific usage steps of the fluid sampling assembly according to this embodiment:

[0084] 1. Move the transmission member 5 downward along the first direction so that its upper and lower support rods (5-2, 5-3) are simultaneously inserted into the corresponding insertion holes 3-3-1 of the upper and lower bottle stoppers (31, 32). At this time, the bottle stopper and the torsion spring are both in the open state.

[0085] 2. Place the sampling bottle 11 into the external housing 2 and the bottle body accommodating cavity 2-1, and place the upper and lower bottle stoppers (12, 13) into the jaws 3-1 of the corresponding bottle stoppers. If there are multiple samplers connected in series as shown in the figure, use the sampler connection housing 8 to connect the external housings 2 of the upper and lower samplers. Specifically, lock the corresponding protrusions 2-6 with the upper locking groove 8-1 and the lower locking groove 8-2 respectively, and use the pulling cable 9 to connect the ends of the transmission members 5 of the upper and lower samplers.

[0086] 3. Lock the trigger component fixing housing 10 and the external housing 2 through the protrusion 2-6 and the locking groove 10-1, and install the gas spring 7 on the trigger component fixing housing 10.

[0087] 4. Tie a rope (not shown, any two symmetric points on the upper part of the housing can be selected as the connection points) to the upper part of the trigger component fixing housing 10, and use the pulling cable 72 to connect the telescopic rod 71 of the gas spring 7 with the transmission member 5. At this time, the gas spring 7 is in a stretched state.

[0088] 5. Slowly lower the sampling assembly into the specified position (depth) in the fluid with a rope, and tie the upper end of the rope tightly at the wellhead. Note that the cable of the gas spring 7 should not be stressed, and tie the upper end of the gas spring cable inside the well cover so that the entire sampling assembly is not exposed outside the well body.

[0089] 6. Before sampling, open the well cover, and note that the cable of the gas spring 7 is not tightened. Collect fluid data (usually collect water level information in groundwater).

[0090] 7. Pull the mechanism at the upper end of the cable so that the telescopic rod 71 of the gas spring 7 contracts upward, driving the transmission member 5 to move upward, and the upper and lower support rods of the transmission member 5 disengage from the upper and lower bottle stoppers.

[0091] 8. Under the action of the upper and lower torsion springs (41, 42), the upper and lower bottle stoppers and the upper and lower bottle stoppers rotate towards the corresponding bottle mouths respectively. Finally, the upper and lower bottle stoppers are hermetically adapted to the upper and lower bottle mouths, and the fluid in the bottle is the sampled sample.

[0092] 9. Untie the upper end of the rope inside the wellhead, and at the same time slowly lift the sampling assembly out of the fluid with a rope. During the process, wind up the gas spring cable at the same time. Note that the gas spring cable should not be stressed to avoid the gas spring 7 detaching from the trigger component fixing housing 10.

[0093] 10. Disassemble the gas spring 7 and the pulling cable 72, and remove the trigger component fixing shell 10. If there are multiple samplers, separately disassemble the pulling cable 9 and the transmission part 5, and remove the sampler connection shell 8 to separate each sampler.

[0094] 11. In each sampler, use tweezers to separately separate the stopper tongs and the stopper, and move the transmission part 5 downward in the first direction to fix the upper and lower stopper tongs (31, 32) in the open position. If the sample can be directly sent to the laboratory, directly tighten the upper and lower bottle caps (14, 15) at the upper and lower openings, and take out the sampling bottle 11 from the outer housing 2. If it is necessary to transfer the sample to a prepared sample bottle, directly take out the sampling bottle 11 from the outer housing 2, open one end of the stopper, and pour it into the sample bottle.

[0095] 12. By analogy for the next sampling preparation, place a new sampling bottle 11 or a sampling bottle 11 that has poured out the sample in the outer housing 2. If the sample is directly sent to the laboratory, replace the new stopper.

[0096] In the above-mentioned first embodiment, the transmission part 5 switches the displacement of the working position along the first direction X, and a torsion spring is used to provide the rotational reset force for the stopper tongs. It should be noted that the switching displacement of the working position of the transmission part is not limited to the first direction, and the opening and closing of the stopper tongs can also be achieved in a non-rotational manner. For details, please refer to the following second embodiment.

[0097] Second Embodiment:

[0098] The core design concept of this solution is the same as that of the first embodiment. The elastic reset part for providing the closing force is located outside the sampling bottle and the stopper tongs. As a passive sampler, there are no other foreign objects in the sampling bottle that may affect the test results. The main difference is that the transmission part 5' of the sampler in this solution displaces along the second direction Y to switch between the open working position and the closed working position relative to the outer housing (not shown in the figure).

[0099] Please refer to Figure 11 and Figure 12 , wherein, Figure 11 is a schematic diagram of the open state of some components of the fluid sampler described in the second embodiment, Figure 12 is Figure 11 a schematic diagram of the closed state of some components shown in

[0100] In this solution, the transmission member 5' has a sliding portion 5-1' located above the through port on the end face of the outer housing. The sliding portion 5-1' can slide relative to the outer housing 2 along the second direction Y to switch between the open working position and the closed working position relative to the outer housing. Similarly, when the transmission member 5' switches to the open working position, the stopper tongs 3' can be held in the open working position by the engaging and limiting pair. When the sampling bottle 11 is placed in the fluid at the target position, the transmission member 5' is used to keep the stoppers (12, 13) and the stopper tongs (31', 32') in the open state; when the transmission member 5' switches to the closed working position, the engaging and limiting pair disengages so that the stopper tongs switch to the closed working position. During the process, the engaging and limiting pair is disengaged by the elastic resetting member located outside the sampling bottle 11, and the stopper can be tightly closed on the bottle mouth and maintain airtightness. Here, the second direction Y is parallel to the plane of the end face of the outer housing, that is, substantially parallel to the cross-section of the bottle body.

[0101] Among them, for the case where the transmission member 5' displaces along the second direction Y to disengage the engaging and limiting pair, different methods can be used to achieve it. For example but not limited to, as shown in the figure, a transition member 2-7' is supplemented. The transition member 2-7' can be directly or indirectly fixedly arranged on the outer housing (not shown in the figure), and the transition member 2-7' has a sliding adaptation portion 2-7-1' arranged along the second direction Y. The sliding portion 5-1' of the transmission member 5' can slide relative to the outer housing along the second direction Y on the sliding adaptation portion 2-7-1'. Thus, the transition member 2-7' is used as the sliding displacement bearing structure.

[0102] Similarly, the upper stopper tongs 31' and the lower stopper tongs 32' include a bottom plate and jaws located at the outer edge of the bottom plate. The jaws form the stopper mounting portion. On the surface of the bottom plate on the opposite side of the jaws, a compression spring guide tube 3-1' is arranged along the first direction, and the transmission member 5' also has an engaging portion 5-2'. The engaging portion 5-2' extends from the sliding portion 5-1' along the first direction to form the aforementioned engaging and limiting pair with the compression spring guide tube 3-1'; the elastic resetting member is a compression spring (41', 42') placed in the compression spring guide tube 3-1'. As shown in the figure, the upper compression spring 41' is pressed between the sliding adaptation portion of the transition member 2-7' and the bottom plate of the upper stopper tongs 31', and the lower compression spring 42' is pressed between the sliding adaptation portion of the transition member 2-7' and the bottom plate of the lower stopper tongs 32'.

[0103] In addition, the engaging and limiting pair formed between the engaging portion 5-2' of the transmission member 5' and the compression spring guide cylinder 3-1' can also be realized in different ways, as long as it can be reliably disengaged along with the displacement of the transmission member 5' in the second direction Y. For example but not limited to, a hook (not shown in the figure) is provided on one of the outer surfaces of the engaging portion 5-2' of the transmission member 5' and the compression spring guide cylinder 3-1', and a bayonet (not shown in the figure) is provided on the other, and the detachable engaging and limiting pair is constructed by the hook and the bayonet.

[0104] In this solution, the trigger elastic member 6' is adapted to the trigger portion (the telescopic rod 71) of the trigger member (gas spring). Further as shown in the figure, one end of the sliding adaptation portion 2-7-1' of the transition member 2-7' has a stop portion 2-7-2' arranged along the first direction X. The trigger elastic member 6' is arranged on the sliding adaptation portion 2-7-1', specifically between the stop portion 2-7-2' and the sliding portion 5-1', and the other side of the sliding portion 5-1' can be pressed against the telescopic rod 71, and is configured that when the telescopic rod 71 presses against the sliding portion 5-1', the trigger elastic member 6' is deformed by force and stores elastic deformation energy, as Figure 11 shown. In this state, the engaging portion 5-2' of the transmission member 5' is engaged and limited with the compression spring guide cylinder 3-1', and the upper and lower bottle mouths are in the open state; when the telescopic rod 71 is triggered to retract, the trigger elastic member 6' releases the deformation energy and acts on the transmission member 5', providing a reset force for the sliding portion 5-1' to switch to the closed working position, and the above-mentioned engaging and limiting pair is disengaged; at the same time, the bottle stopper pliers (31', 32') are displaced in the first direction to the corresponding bottle mouths under the action of the corresponding compression springs (41', 42'), realizing the sealing adaptation of the bottle stopper and the bottle mouth.

[0105] Of course, the trigger elastic member 6' can preferably be a compression spring, which has a simple structure and relatively low cost.

[0106] In addition, based on the characteristic that the opening directions of the upper and lower transmission members 5' in this solution are opposite, for the fluid sampling assembly constituted by the sampler in this solution, two gas springs are configured to trigger the upper transmission member 5' and the lower transmission member 5' respectively, and the design of the intermediate member of the mechanism is relatively simple, which is the optimal design.

[0107] It should be noted that for the above-mentioned embodiments provided in this embodiment, the outer shell may not completely wrap around the sampling bottle, and the shape of the bottom plate of the bottle stopper pliers is not limited to the preferred example shown in the figure. It should be understood that as long as the technical means consistent with the core concept of this solution are adopted, they are all within the scope of protection requested by this application.

[0108] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and retouches can be made, and these improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. A fluid sampler, characterized in that, Comprising: An outer housing, the bottle body accommodating cavity of which has end surface through-holes corresponding to the bottle mouths of the sampling bottles, and there are two end surface through-holes oppositely arranged along a first direction to respectively correspond to the two bottle mouths of the sampling bottles. The inner wall of the bottom side of the outer housing has a supporting portion extending inwards. In the projection plane perpendicular to the first direction, the inner edge contour of the supporting portion is located outside the outer contour of the bottleneck of the sampling bottle, and the first direction is perpendicular to the plane where the end surface of the outer housing is located; Two bottle stopper pliers, respectively located outside the two end surface through-holes of the outer housing, and configured to switch between an open working position and a closed working position relative to the outer housing. A bottle stopper mounting portion is provided on the bottle stopper pliers and configured as follows: the bottle stopper provided on the bottle stopper pliers in the closed working position is hermetically adapted to the bottle mouth of the sampling bottle; the bottle stopper pliers include a bottom plate and clamping jaws located at the outer edge of the bottom plate, and the clamping jaws form the bottle stopper mounting portion; Two elastic reset members, respectively placed between the outside of the two bottle stopper pliers and the outer housing, and configured as follows: when the bottle stopper pliers are switched to the open working position, the elastic reset members are deformed under force and store elastic deformation energy, and the deformation energy can be released to provide a reset acting force for the bottle stopper pliers to switch to the closed working position; A transmission member, having a rod body built in the surface chute of the outer housing and capable of linearly displacing along the first direction in the chute to switch between an open working position and a closed working position relative to the outer housing; a support rod is provided on one of the end of the rod body of the transmission member and the bottom plate of the bottle stopper pliers, and an insertion hole is provided on the other. The support rod and the insertion hole form a detachable engaging and limiting pair and are configured as follows: when the transmission member is switched to the open working position, the bottle stopper pliers can be held in the open working position through the engaging and limiting pair; when the transmission member is switched to the closed working position, the engaging and limiting pair is disengaged so that the bottle stopper pliers can be switched to the closed working position.

2. The fluid sampler according to claim 1, wherein The cross-sections of the chute and the rod body are both non-circular.

3. The fluid sampler according to claim 2, characterized in that, The elastic reset member is a torsion spring, and the two working ends of the torsion spring are respectively connected to the outer surface of the outer housing and the outer surface of the bottom plate; a central shaft is inserted through the spring coil hole of the torsion spring, and the end of the central shaft is pivotally connected to the body of the outer housing so that the bottle stopper pliers can rotate relative to the outer housing to switch between the open working position and the closed working position.

4. The fluid sampler according to claim 3, characterized in that, A spring fixing seat is provided on the outer surface of the bottom plate, and a spring horizontal fixing hole parallel to the plate surface of the bottom plate is opened on the spring fixing seat, and the corresponding working end of the torsion spring is inserted and connected to the spring horizontal fixing hole.

5. The fluid sampler according to claim 4, characterized in that, The support rod is bent and extended from the rod body of the transmission member, and the bending directions of the two support rods at both ends are the same; the insertion hole is opened on a vertical plate provided on the bottom plate of the bottle stopper pliers.

6. The fluid sampler according to claim 5, wherein, The vertical plate is located on the bottom plate on the side of the spring fixing seat close to the central shaft, and a spring vertical fixing hole is also opened on the vertical plate so that the corresponding working end of the torsion spring can be inserted and connected to the spring horizontal fixing hole through the spring vertical fixing hole opened on the vertical plate.

7. The fluid sampler according to claim 5, characterized in that, When the cork pliers are in the open working position, the insertion holes on the vertical plate are arranged in the first direction.

8. A fluid sampler, characterized in that, Comprising: An outer housing, the bottle body accommodating cavity of which has an end face through hole correspondingly arranged with the bottle mouth of the sampling bottle; Cork pliers, located outside the end face through hole of the outer housing, and configured to switch between an open working position and a closed working position relative to the outer housing. A cork mounting portion is provided on the cork pliers, and it is configured that: the cork provided on the cork pliers in the closed working position is hermetically adapted to the bottle mouth of the sampling bottle; the end face through hole includes two relatively arranged ones in the first direction, respectively corresponding to the two bottle mouths of the sampling bottle, and both the cork pliers and the elastic reset member are correspondingly provided in two; the first direction is perpendicular to the plane where the end face of the outer housing is located; The transmission member has a sliding portion located above the end face through hole. A transition member is fixedly provided on the outer housing. The transition member has a sliding adaptation portion arranged in the second direction. The sliding portion can slide relative to the outer housing in the second direction on the sliding adaptation portion, so as to switch between an open working position and a closed working position relative to the outer housing. The second direction is parallel to the plane where the end face of the outer housing is located; The cork pliers include a bottom plate and clamping jaws located at the outer edge of the bottom plate. The clamping jaws form the cork mounting portion. The surface of the bottom plate on the opposite side of the clamping jaws is provided with a compression spring guide cylinder along the first direction, and the transmission member has a clamping portion arranged along the first direction from the sliding portion; a hook is provided on one of the outer surface of the clamping portion of the transmission member and the outer surface of the compression spring guide cylinder, and a bayonet is provided on the other. The hook and the bayonet form a detachable clamping and limiting pair; the elastic reset member is a compression spring placed in the compression spring guide cylinder, and is press-fitted between the sliding adaptation portion of the transition member and the bottom plate of the cork pliers.

9. The fluid sampler according to claim 8, wherein, One end of the sliding adaptation portion of the transition member has a stop portion arranged along the first direction. A trigger elastic member is provided on the sliding adaptation portion between the stop portion and the sliding portion. The other side of the sliding portion can be pressed against the trigger portion, and is configured that: when the trigger portion presses against the sliding portion, the trigger elastic member is deformed by force and stores elastic deformation energy, and can release the deformation energy to provide a reset acting force for the sliding portion to switch to the closed working position.

10. A fluid sampling assembly includes at least two fluid samplers, characterized in that, The fluid sampler is specifically as described in any one of claims 1 to 9, and further includes a trigger member and a sampler connecting member provided between the outer housings of adjacent fluid samplers; the sampler connecting member is detachably connected to both of the two outer housings; the trigger portion of the trigger member is connected to one of the transmission members. The adjacent transmission members arranged relatively in the first direction are connected by a pulling cable, so as to synchronously switch to the closed working position under the action of the trigger member.

11. The fluid sampling assembly according to claim 10, wherein It further includes a trigger member fixing member for mounting the trigger member. The trigger member fixing member is detachably connected to the outer housing of the fluid sampler located on the outer side in the first direction. The trigger portion of the trigger member is connected to the transmission member of the outer side fluid sampler.

12. The fluid sampling assembly according to claim 11, wherein, Both the sampler connector and the trigger component fixture are circumferentially incompletely closed housing structures; among them, the sampler connection housing and the trigger component fixture housing are respectively sleeved on the outer side of the outer housing of the corresponding fluid sampler, and there is a detachable mating pair between the upper and lower ends of the outer housing of the fluid sampler and the corresponding sampler connection housing and / or the trigger component fixture housing.

13. The fluid sampling assembly according to claim 12, wherein A convex block extending outward is provided at the end of the outer housing, and locking grooves are respectively formed on the sampler connection housing and / or the trigger component fixture housing. The locking groove has an insertion section and a locking section which are communicated. The insertion section extends along the first direction to the edge of the corresponding housing structure, and the locking groove and the convex block constitute the detachable mating pair.

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