CN220854255U - Portable liquid sampler - Google Patents

Abstract

The disclosure relates to the technical field of sampling tools, and relates to a portable liquid sampler. The sampler includes sampling pole, sampling clamp, control assembly and rotating member, its characterized in that: one end of the sampling rod is connected with the sampling clamp through a rotating piece; the control assembly comprises a controller and a pull rope mechanism, the controller is arranged on the sampling rod, and the pull rope mechanism is controlled to act through a switch on the controller, so that two clamping arms of the sampling clamp are opened or closed; the inner surfaces of the two clamping arms are cambered surfaces, the space for clamping the sampling bottle is formed by the cambered surfaces opposite to the two clamping arms, and the two clamping arms are provided with fixing pieces for fixing the sampling bag. The sampler can realize sampling requirements of different distances and different angles, can select various containers such as sampling bottles, sampling bags and the like to sample according to requirements, and is more labor-saving and convenient in the sampling process.

Description

Portable liquid sampler

Technical Field

The embodiment of the disclosure relates to the technical field of sampling tools, in particular to a portable liquid sampler.

Background

Sample collection is an important link in inspection and analysis, and is applied to a plurality of fields such as environmental sampling, biomedical research, pharmaceutical research, quality detection and the like. But different sampling conditions such as shoreside, bridge head, mine tunnel, deeper and narrower industrial equipment sampling ports and the like put higher requirements on the sampling tool.

Existing remote sampling mostly uses a combination of a sampling rod and a sampling clamp. When the sampling clamp is used for collecting samples, two methods of directly clamping the samples and fixing the sampling containers are adopted.

The direct clamping sampling method needs to manually press down a handle on a sampling rod, and the handle drives a pull rod to drag a pull rope to move, so that a sampling clamp connected with the pull rope opens to clamp a sample. On one hand, the moving range of the pull rope is limited by the pressing range of the handle, and the opening and closing angle of the sampling clamp is limited; on the other hand, the sampling clamp is provided with a torsion spring, and the manual handle pressing is laborious.

The sampling method of the fixed sampling container can not realize the operation of other sampling containers such as sampling bags and the like due to the self structural limitation of the sampling clamp, and the sampling bottle needs to be manually placed and fastened. Because hard containers such as sampling bottles and the like are expensive and inconvenient to carry, the hard containers need to be cleaned, disinfected and sterilized before and after each sampling; on one hand, the sampling bag is more economical and practical as a disposable product; on the other hand, the material is softer, so that the sample can be sampled at a narrower sampling point. Therefore, the current sampling method of the fixed sampling container which is only suitable for the hard container such as the sampling bottle and the like cannot better meet the sampling requirement.

Disclosure of utility model

Embodiments of the present disclosure provide a portable liquid sampler that aims to address one or more of the above problems and other potential problems.

In order to achieve the above object, the following technical scheme is provided:

The utility model provides a pair of portable liquid sampler, including sampling rod, sampling clamp, control assembly and rotating member, its characterized in that: one end of the sampling rod is connected with the sampling clamp through a rotating piece; the control assembly comprises a controller and a pull rope mechanism, the controller is arranged on the sampling rod, and a switch on the controller controls the pull rope mechanism to act so that two clamping arms of the sampling clamp are opened or closed; the inner surfaces of the two clamping arms are cambered surfaces, the space for clamping the sampling bottle is formed by the cambered surfaces opposite to the two clamping arms, and the two clamping arms are provided with fixing pieces for fixing the sampling bag.

According to the portable liquid sampler disclosed by the embodiment of the disclosure, the fixing piece for fixing the non-rigid sampling containers such as the sampling bag is arranged on the sampling clamp, so that various containers such as the sampling bottle, the sampling bag and the like can be selected according to sampling requirements, and the sampling requirements under different sampling environments are met; and simultaneously, the controller and the pull rope mechanism are utilized to realize the opening and closing control of the sampling clamp, so that the use process is more labor-saving and convenient.

In some embodiments, the sampling rod comprises a fixed rod and a movable rod, one end of the movable rod is inserted into the fixed rod and moves relative to the fixed rod, a limiting hole is formed in the fixed rod, a telescopic clamping piece is arranged on the movable rod, and the telescopic clamping piece is clamped into the limiting hole to fix the positions of the fixed rod and the movable rod; the other end of the movable rod is connected with the sampling clamp through a rotating piece.

In some embodiments, the pull rope structure comprises a rope reel, a pull rope and a pulley block, wherein the rope reel is connected with the controller, one end of the pull rope is wound on the rope reel, and the other end of the pull rope bypasses the pulley block and is connected with the sampling clamp; the two clamping arms of the sampling clamp are pulled to open by the pull rope under the control of the controller, the two clamping arms of the sampling clamp return to the original positions when the pull rope is loosened under the control of the controller, and the pull rope stretches outwards when the movable rod moves outwards relative to the fixed rod until the pull rope stops stretching after the movable rod is fixed.

In some embodiments, the rope winder comprises a motor, a rotating wheel and a first spring, wherein the motor is connected with the controller, the rotating wheel is installed on an output shaft of the motor, the first spring is wound on the rotating wheel, one end of the first spring is fixed on the rotating wheel, and the other end of the first spring is connected with the pull rope; the motor drives the rotating wheel to rotate and drives the first spring to control the tightness of the pull rope.

In some embodiments, the side of the runner is provided with a groove, so that the runner is tightly fitted with the clockwork spring.

In some embodiments, the sampling clamp comprises two clamp arms, a rotating shaft and a torsion spring, wherein the torsion spring is sleeved on the rotating shaft to enable the two clamp arms to keep a closed state, the pull rope bypasses the pulley block to be connected with tail ends of the two clamp arms respectively, and when the pull rope pulls the two clamp arms, the two clamp arms are opened around the rotating shaft.

In some embodiments, the sampling clip comprises a sampling clip base and two clip arms, the sampling clip base being connected to the movable lever by the rotating member; the sampling clamp comprises a sampling clamp base, a sampling rod, a sampling clamp base and a sampling clamp, wherein the sampling clamp base is provided with two sliding parts, two sliding rails and two second springs, the two sliding parts are respectively connected with the two clamping arms, the sliding rail is perpendicular to the sampling rod in the arrangement direction, the sliding parts can drive the clamping arms to slide on the sliding rails, one end of each second spring is connected to the sliding parts, and the other end of each second spring is connected to one end of the sliding rail far away from the center of the sampling clamp base; the sliding piece is connected with the pull rope; when the pull rope pulls the sliding piece to move towards one end far away from the center of the sampling clamp base, the second spring is compressed, and the two clamp arms are opened; when the pull rope is loosened, the sliding piece moves towards one end of the center of the sampling clamp base under the action of the second spring, and the two clamp arms are closed.

In some embodiments, the inner surfaces of the two clamping arms have at most three cambered surfaces with different lengths and arc lengths, and the cambered surfaces with the same length and opposite cambered surfaces form a group of spaces for clamping the sampling bottle.

In some embodiments, the inner surfaces of the two clamping arms for clamping are provided with an anti-slip layer.

In some embodiments, the fixing member includes a clip and a tightening member, the clip is attached to the clamping arm by the tightening member, and the tightening member can adjust a gap between the clip and the clamping arm.

Drawings

The above, as well as additional purposes, features, and advantages of embodiments of the present disclosure will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. In the accompanying drawings, several embodiments of the present disclosure are shown by way of example, and not by way of limitation.

FIG. 1 shows a schematic diagram of a portable liquid sampler according to one embodiment of the present disclosure;

FIG. 2 shows a schematic view of the limiting aperture and the telescoping clip of FIG. 1;

FIG. 3 is a schematic diagram of the pull cord structure of FIG. 1;

FIG. 4 shows a schematic structural view of the rope reel of FIG. 3;

FIG. 5 shows a schematic structural view of the sampling clip of FIG. 1;

FIG. 6 shows a schematic structural view of a sampling clip according to another embodiment of the present disclosure;

Fig. 7 shows an enlarged view of the pulley block of fig. 6;

fig. 8 shows a schematic structural view of the fixing member.

1-Sampling rod, 11-fixed rod, 12-movable rod, 2-sampling clamp, 21-sampling clamp base, 211-slider, 212-slide rail, 213-second spring, 22-clamp arm, 221-anti-slip layer, 222-extension clamp, 23-rotating shaft, 24-torsion spring, 3-control component, 31-controller, 311-switch, 32-stay cord structure, 321-rope winder, 3211-motor, 3212-runner, 3213-first spring, 322-stay cord, 323-pulley block, 3231-first pulley, 3232-second pulley, 3233-third pulley, 4-rotating member, 5-fixed member, 51-clip, 52-elastic member, 61-limiting hole, 62-telescopic clip.

Like or corresponding reference characters indicate like or corresponding parts throughout the several views.

Detailed Description

Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present disclosure are illustrated in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The term "comprising" and variations thereof as used herein means open ended, i.e., "including but not limited to. The term "or" means "and/or" unless specifically stated otherwise. The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment. The term "another embodiment" means "at least one additional embodiment". The terms "upper," "lower," "front," "rear," and the like, as used herein, refer to a place or position relationship based on the orientation or position relationship shown in the drawings, and are merely for convenience in describing the principles of the present disclosure, and do not refer to or imply that the elements referred to must have a particular orientation, be configured or operated in a particular orientation, and thus should not be construed as limiting the present disclosure.

A portable liquid sampler according to embodiments of the present disclosure is described in detail below with reference to the accompanying drawings. Fig. 1 shows a schematic structural diagram of a portable liquid sampler according to an embodiment of the present disclosure, which includes a sampling rod 1, a sampling clip 2, a control assembly 3, and a rotating member 4. One end of the sampling rod 1 is connected with the sampling clamp 2 through a rotating piece 4; the control assembly 3 comprises a controller 31 and a pull rope mechanism 32, the controller 31 is arranged on the sampling rod 1, and the pull rope mechanism 32 is controlled to act through a switch 311 on the controller 31 so that the two clamping arms 22 of the sampling clamp 2 are opened or closed; the inner surfaces of the two clamping arms 22 are cambered surfaces, the opposite cambered surfaces of the two clamping arms 22 form a space for clamping the sampling bottle, and the two clamping arms 22 are provided with fixing pieces 5 for fixing the sampling bag. Wherein, the controller 31 is provided with a control circuit and a power supply module, the switch 311 can be a button, a knob and other components which are easy to be operated by sampling personnel, and the sampling clamp is more labor-saving and convenient to control; the fixing pieces 5 are respectively arranged on the two clamping arms 22, and the fixing pieces 5 can fix two ends of the bag mouth of a sampling container such as a sampling bag and the like so as to open the bag mouth.

The sampling rod 1 comprises a fixed rod 11 and a movable rod 12, wherein one end of the movable rod 12 is inserted into the fixed rod 11 and moves relative to the fixed rod 11. As shown in fig. 2, the fixed rod 11 is provided with a limiting hole 61, the movable rod 12 is provided with a telescopic clamping piece 62, and the telescopic clamping piece 62 is clamped into the limiting hole 61 to fix the positions of the fixed rod 11 and the movable rod 12; the other end of the movable rod 12 is connected with the sampling clamp 2 through a rotating piece 4. The fixing rod 11 may have one end inserted into the movable rod 12, the limiting member 61 is disposed on the movable rod 12, the telescopic clamping member 62 is disposed on the fixing rod 11, so as to ensure that the limiting member 61 is disposed on the rod that is extended, and the telescopic clamping member 62 is disposed on the other rod; the closer the position of the limiting piece 61 and the telescopic clamping piece 62 is to the end where the two rods are connected, the larger the telescopic range of the sampling rod 1 is.

In addition, a plurality of movable rods 12 can be arranged, the rods can be inserted from end to move mutually, and the limiting holes 61 and the telescopic clamping pieces 62 are respectively arranged on two adjacent movable rods 12 and used for fixing the positions of the movable rods 12 after the movable rods 12 move. When the movable rods 12 are fixed by using the limiting holes 61 and the telescopic clamping pieces 62, the limiting holes 61 are formed in the rod which is stretched in, and the telescopic clamping pieces 62 are formed in the other rod. The more the number of the movable rods 12 is, the shorter the required length of each movable rod 12 is, the telescopic range of the sampling rod 2 is enlarged, and the volume of the sampling rod 2 is reduced when the sampling rod 2 is contracted to the shortest time, so that the sampling rod is convenient to store. Further, the fixing rod 11 is provided with a plurality of equidistant limiting holes 61, one telescopic clamping piece 62 can correspond to the telescopic clamping pieces 61 at a plurality of different positions, and the telescopic range of the sampling rod 2 is finer. Similarly, when there are a plurality of movable rods 12, a plurality of limiting holes 61 on the movable rods 12 may be provided.

As shown in fig. 3, the pull rope structure 32 includes a rope winder 321, a pull rope 322 and a pulley block 323, wherein the rope winder 321 is connected with the controller 31, one end of the pull rope 322 is wound on the rope winder 321, and the other end of the pull rope 322 bypasses the pulley block 323 and is connected with the sampling clamp 2; the pulling rope 322 pulls the two clamping arms 22 of the sampling clamp 2 to open under the control of the controller 31, when the pulling rope 322 is released under the control of the controller 31, the two clamping arms 22 of the sampling clamp 2 return to the original position, and when the movable rod 12 moves outwards relative to the fixed rod 11, the pulling rope 322 stretches outwards until the pulling rope 22 stops stretching after the movable rod 12 is fixed. The positions and the number of the pulleys of the pulley block 323 are determined according to specific conditions, so that the line of the pull rope 322 can be ensured to be concise, and the sampling clamp 2 can be pulled more labor-saving.

In the sampling process, the sampling personnel firstly adjusts the rotating piece 4 to enable the angle between the sampling clamp 2 and the sampling rod to meet the requirement of a sampling point, then pulls the movable rod 12 to move outwards relative to the fixed rod 11, and the rope winder 321 releases the pull rope 322 to enable the pull rope 322 to move synchronously along with the movable rod 12, so that the length of the sampling rod 1 is increased. When the length of the sampling rod 1 meets the sampling requirement, the sampling personnel fix the position of the movable rod 12 after moving through the limiting piece 61 and the telescopic clamping piece 62. After the length of the sampling rod 1 is fixed, the sampling clamp 2 is in a closed state in a natural state, the pull rope 322 is pulled by the rope winder 321, the two clamping arms 22 of the sampling clamp 2 connected with the pull rope 322 are driven to be opened, the opening size of the two clamping arms 22 is related to the moving distance of the pull rope 322, and the more the moving distance of the pull rope 322 is, the more the two clamping arms 22 are opened.

Specifically, as shown in fig. 4, the rope winder 321 includes a motor 3211, a rotating wheel 3212 and a first spring 3213, the motor 3211 is connected to the controller 31, the rotating wheel 3212 is mounted on an output shaft of the motor 3211, the first spring 3213 is wound on the rotating wheel 3212, one end of the first spring 3213 is fixed on the rotating wheel 3212, and the other end of the first spring 3213 is connected to the pull rope 322; the motor 3211 drives the rotating wheel 3212 to rotate and then drives the first spring 3213 to control the tightness of the pull rope 322. The first spring 3213 may be a spring, and adjusts the length of the pull cord 322 within a certain limit, and keeps the pull cord 322 in a tensioned state, so that the pull cord is not easy to be entangled.

When the length of the sampling rod 1 is adjusted, the clockwork spring 3213 connected with the pulling rope 322 is stretched or loosened, so that the pulling rope 322 can move along with the extension and retraction of the sampling rod 1, and the pulling rope can be kept in a straight state to prevent entanglement. When the pulling rope 322 is pulled to control the two clamping arms 22 of the sampling clamp 2 to open, the rotating wheel 3212 rotates under the control of the motor 3211, and the pulling rope 322 is wound on the rotating wheel 3212. In addition, the first spring 3213 may not be disposed on the rotating wheel 3212, one end of the pull rope 322 is fixed to the rotating wheel 3212, the other end of the pull rope 322 is connected to the sampling clamp 2, the pull rope 322 is partially wound around the rotating wheel 3212, and the pull rope 322 is directly driven to move when the rotating wheel 3212 rotates. Compared with the first spring 3213, the method requires the rotating wheel 3212 to be matched for rotation when adjusting the length of the sampling rod 1, so that synchronous movement of the pull rope 322 is realized.

The side surface of the rotating wheel 3212 is provided with a groove, so that the first spring 3213 and the pull rope 322 are tightly attached to the side surface of the rotating wheel 3212 when being wound on the rotating wheel 3212, the spring 3213 and the pull rope 322 are not easy to slide and fall off to the upper end surface and the lower end surface of the rotating wheel 3212, and the shape of the groove is not limited to that shown in fig. 4.

In one embodiment, as shown in fig. 5, the sampling clamp 2 includes two clamp arms 22, a rotating shaft 23 and a torsion spring 24, the torsion spring 24 is sleeved on the rotating shaft 23 to keep the two clamp arms 22 in a closed state, the pull rope 322 bypasses the pulley block 323 to be connected with the tail ends of the two clamp arms 22 respectively, and when the pull rope 322 pulls the two clamp arms 22, the two clamp arms 22 are opened around the rotating shaft 21.

In another embodiment, as shown in fig. 6, the sampling clamp 2 includes a sampling clamp base 21 and two clamp arms 22, and the sampling clamp base 21 is connected to the movable rod 12 through the rotating member 4; the sampling clamp base 21 is provided with two sliding pieces 211, two sliding rails 212 and two second springs 213, the two sliding pieces 211 are respectively connected with the two clamping arms 22, the sliding rails 212 are perpendicular to the sampling rod 1 in arrangement direction, the sliding pieces 211 can drive the clamping arms 22 to slide on the sliding rails 212, one ends of the second springs 213 are connected to the sliding pieces 211, and the other ends of the second springs 213 are connected to one ends of the sliding rails 212 far away from the center of the sampling clamp base 21; the sliding piece 211 is connected with the pull rope 322; when the pulling rope 322 pulls the sliding member 211 to move toward one end far from the center of the sampling clip base 21, the second spring 213 is compressed, and the two clip arms 22 are opened; when the pull rope 322 is loosened, the sliding piece 211 moves towards one end of the center of the sampling clamp base 21 under the action of the second spring 213, and the two clamp arms 22 are closed. In this embodiment, two slide rails 212 are disposed on the sampling clamp base 21, two clamp arms 22 respectively correspond to one slide rail 212, or one slide rail 212 may be disposed on the sampling clamp base 21, where one clamp arm 22 is driven by the sliding member 211 to move along the slide rail 212, and the positions of the other clamp arm 22 and the sampling clamp base 21 remain unchanged. The slider 211 may be a part of the clip arm 22, or may be connected to the clip arm 22 by a bolt or the like. The pulley block 323 in this embodiment has 3 pulleys, namely a first pulley 3231, a second pulley 3232 and a third pulley 3233, and the arrangement positions of the pulleys are shown in fig. 7.

Compared with the first embodiment, the second embodiment adopts the sliding rail 212 to realize the movement of the clamping arm 22, the opening and closing range of the sampling clamp 2 is larger, and the clamping angle of the clamping arm 22 is more fit with the sampling container.

The inner surfaces of the two clamping arms 22 in the two embodiments have at most three cambered surfaces with different lengths and arc lengths, and the cambered surfaces with the same length and opposite lengths form a group of spaces for clamping the sampling bottle. The arc length can be adjusted according to the size and shape of the sampling container, so that the clamping arm 22 is attached to the surface of the sampling container as much as possible when clamping the sampling container, and the stress area is increased, so that the clamping is more stable. The inner surface of the clamping arm 22 is made of a material with a certain deformation degree, and is further attached to the surface of the sampling container during clamping.

The two clamping arms 22 are provided with an anti-slip layer 221 on the inner surface for clamping, and the anti-slip layer 221 is made of a glue film or other materials with larger friction force, so that the sampling container is prevented from sliding down during clamping.

The tip of two arm lock 22 is equipped with the extension clamp 222 that presss from both sides the sample, the extension clamp 222 is used for directly pressing from both sides the less solid sample of volume, the extension clamp 222 is used for the interior surface of centre gripping can set up the sawtooth of closely laminating, and it is more firm when pressing from both sides the sample, also can use the sawtooth to cut apart the sample when encountering the more hard long-pending solid of texture and gather.

As shown in fig. 8, the fixing member 5 includes a clamping piece 51 and an elastic member 52, the clamping piece 51 is attached to the clamping arm 22 by the elastic member 52, and the elastic member 52 can adjust the gap between the clamping piece 51 and the clamping arm 22. The fixing piece 5 is used for fixing non-rigid sampling containers such as sterile bags, a sampling person pulls the sterile bags open by using handles in the sampling process, the two handles are respectively inserted into gaps between the clamping piece 51 and the clamping arm 22, and then the elastic piece 52 is adjusted to enable the gaps between the clamping piece 51 and the clamping arm 22 to be smaller, so that the purpose of clamping and fixing the handles is achieved. The elastic member 52 is a member capable of adjusting the tightness, such as a bolt or a knob. The opening and closing of the clamp arm 22 can also be controlled to adjust the size of the opening of the sterile bag after the sterile bag is fixed on the clamp arm 22. In addition to the embodiments of the present disclosure, the handle may be fixed by other connection methods such as a clip, a hook, etc., and the number and the installation positions of the fixing members 5 are not limited to those shown in fig. 8.

While several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the disclosure. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single implementation. Conversely, various features that are described in the context of a single implementation can also be implemented in multiple implementations separately or in any suitable subcombination.

Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are example forms of implementing the claims.

The foregoing description of the embodiments of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvements in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (10)

1. The utility model provides a portable liquid sampler, includes sampling pole (1), sampling clamp (2), control assembly (3) and rotates piece (4), its characterized in that: one end of the sampling rod (1) is connected with the sampling clamp (2) through a rotating piece (4); the control assembly (3) comprises a controller (31) and a pull rope mechanism (32), the controller (31) is arranged on the sampling rod (1), and a switch (311) on the controller (31) controls the pull rope mechanism (32) to act so that two clamping arms (22) of the sampling clamp (2) are opened or closed; the inner surfaces of the two clamping arms (22) are cambered surfaces, the space for clamping the sampling bottle is formed by the cambered surfaces opposite to the two clamping arms (22), and the two clamping arms (22) are provided with fixing pieces (5) for fixing the sampling bag.

2.A portable liquid sampler as claimed in claim 1 wherein: the sampling rod (1) comprises a fixed rod (11) and a movable rod (12), one end of the movable rod (12) is inserted into the fixed rod (11) and moves relative to the fixed rod (11), a limiting hole (61) is formed in the fixed rod (11), a telescopic clamping piece (62) is arranged on the movable rod (12), and the telescopic clamping piece (62) is clamped into the limiting hole (61) to fix the positions of the fixed rod (11) and the movable rod (12); the other end of the movable rod (12) is connected with the sampling clamp (2) through the rotating piece (4).

3. A portable liquid sampler as claimed in claim 2 wherein: the rope pulling mechanism (32) comprises a rope winder (321), a rope pulling rope (322) and a pulley block (323), the rope winder (321) is connected with the controller (31), one end of the rope pulling rope (322) is wound on the rope winder (321), and the other end of the rope pulling rope (322) bypasses the pulley block (323) and is connected with the sampling clamp (2); the stay cord (322) is in the control of controller (31) is pulled two arm lock (22) of sampling clamp (2) are opened, stay cord (322) is in when the control of controller (31) is released two arm lock (22) of sampling clamp (2) resume the normal position, movable rod (12) are relative when dead lever (11) outwards remove, stay cord (322) outwards stretches, until movable rod (12) are fixed back stay cord (322) stops stretching.

4. A portable fluid sampler according to claim 3 and wherein: the rope winder (321) comprises a motor (3211), a rotating wheel (3212) and a first spring (3213), the motor (3211) is connected with the controller (31), the rotating wheel (3212) is installed on an output shaft of the motor (3211), the first spring (3213) is wound on the rotating wheel (3212), one end of the first spring (3213) is fixed on the rotating wheel (3212), and the other end of the first spring (3213) is connected with the pull rope (322); the motor (3211) drives the rotating wheel (3212) to rotate and drives the first spring (3213) to control the tightness of the pull rope (322).

5. The portable fluid sampler of claim 4, wherein: grooves are formed in the side faces of the rotating wheels (3212), so that the rotating wheels (3212) are tightly attached to the springs (3213).

6. A portable fluid sampler according to claim 3 and wherein: the sampling clamp (2) comprises two clamp arms (22), a rotating shaft (23) and a torsion spring (24), wherein the torsion spring (24) is sleeved on the rotating shaft (23) to enable the two clamp arms (22) to be kept in a closed state, a pull rope (322) bypasses the pulley block (323) to be connected with the tail ends of the two clamp arms (22) respectively, and the pull rope (322) pulls the two clamp arms (22) to be opened around the rotating shaft (23).

7. A portable fluid sampler according to claim 3 and wherein: the sampling clamp (2) comprises a sampling clamp base (21) and two clamping arms (22), and the sampling clamp base (21) is connected with the movable rod (12) through the rotating piece (4); the sampling clamp comprises a sampling clamp base (21), and is characterized in that two sliding parts (211), two sliding rails (212) and two second springs (213) are arranged on the sampling clamp base (21), the two sliding parts (211) are respectively connected with two clamping arms (22), the arrangement direction of the sliding rails (212) is perpendicular to that of the sampling rod (1), the sliding parts (211) can drive the clamping arms (22) to slide on the sliding rails (212), one ends of the second springs (213) are connected to the sliding parts (211), and the other ends of the second springs (213) are connected to one ends of the sliding rails (212) far away from the center of the sampling clamp base (21); the sliding piece (211) is connected with the pull rope (322); when the pull rope (322) pulls the sliding piece (211) to move towards one end far away from the center of the sampling clamp base (21), the second spring (213) is compressed, and the two clamp arms (22) are opened; when the pull rope (322) is loosened, the sliding piece (211) moves towards one end of the center of the sampling clamp base (21) under the action of the second spring (213), and the two clamping arms (22) are closed.

8. A portable liquid sampler according to claim 6 or 7 and wherein: the inner surfaces of the two clamping arms (22) are provided with at most three cambered surfaces with different lengths and arc lengths, and the cambered surfaces which are the same in length and opposite to each other are a group of spaces for forming the clamping sampling bottle.

9. The portable fluid sampler of claim 8, wherein: the inner surfaces of the two clamping arms (22) used for clamping are provided with anti-slip layers (221).

10. A portable liquid sampler as claimed in claim 1 wherein: the fixing piece (5) comprises a clamping piece (51) and an elastic piece (52), the clamping piece (51) is attached and fixed on the clamping arm (22) through the elastic piece (52), and the elastic piece (52) can adjust the size of a gap between the clamping piece (51) and the clamping arm (22).