CN218780346U - Water stopper for drilling layered water pumping - Google Patents

Abstract

The utility model discloses a drilling layering water stop that draws water, including the bottom for the sampler barrel of opening setting and install the water stop body in the sampler barrel, the water stop body carries out the shutoff through the bottom of shutoff board to the sampler barrel including sealed movable contact at the shutoff board of sampler barrel bottom. The utility model discloses a tight mechanism of elastic guide, the shutoff board, float the board, waterproof touch switch, the setting of electric telescopic handle and controller, can open the bottom of sampler barrel when the sample, and can accomplish the back in the sample, the shutoff is stabilized to the bottom of sampler barrel automatically when the water yield in the sampler barrel reaches a certain amount, can effectually avoid the not enough condition of sample water yield, through extrusion mechanism, the setting of pressure sensor and controller, can be when sealed effect is unsatisfactory, automatically, adjust the leakproofness, thereby can effectively control its leakproofness, improve its shutoff sealing stability.

Description

Water stopper for drilling layered water pumping

Technical Field

The utility model relates to a layering water seal technical field that draws water especially relates to a drilling layering water seal that draws water.

Background

In hydrogeological exploration work, a method of drilling holes to extract underground water for detection is needed to obtain hydrogeological parameters, and layered water pumping is carried out, so that exploration precision can be greatly improved, and a water stopper is needed to seal and isolate a sampling device during sampling so as to improve detection accuracy; the present water stop for sampling device is last, it is when shutoff sampling device's water inlet, it is personnel usually after opening water inlet interval a period, direct shutoff water inlet, whether the inflow in its sampling device can't guarantee to have reached certain volume, the existence does not reach the condition of the direct shutoff of requirement because of the inflow, and then influences the sample effect, and the leakproofness of shutoff water inlet is difficult to control, can not satisfy the user demand, synthesize above-mentioned condition, therefore we have provided a drilling layering water stop of drawing water.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a water stopper for pumping water in a drilling layer.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a water stopper for layered water pumping in drilling comprises a sampling tube with an opening at the bottom and a water stopper body arranged in the sampling tube, wherein the water stopper body comprises a plugging plate which is in sealing movable contact with the bottom of the sampling tube, the bottom of the sampling tube is plugged by the plugging plate, first guide rods are fixedly connected to two sides of the top of the plugging plate, the sampling tube is slidably sleeved on the two first guide rods, the first guide rods have a vertical guiding effect on the plugging plate, a filter screen is fixedly arranged in the sampling tube, the filter screen can filter impurities in the entering water, a partition plate is fixedly arranged in the sampling tube and divides the plugging plate into two regions, an elastic guide tightening mechanism is fixedly connected between the bottom of the partition plate and the top of the plugging plate, the elastic guide tightening mechanism is arranged and can provide upward tightening force for the plugging plate, an L-shaped rod is fixedly connected to the right side of the elastic guide tightening mechanism, the top of the L-shaped rod extends to the upper part of the partition plate, a pressure sensor fixedly connected with the elastic guide tightening mechanism is arranged below the partition plate, a floating force control mechanism is fixedly connected with an extrusion plate, a floating rod capable of fixedly connected with an extrusion mechanism, a floating rod capable of controlling extrusion mechanism is fixedly connected with an extrusion plate, and an extrusion mechanism, the floating rod capable of vertically moving and an extrusion mechanism is connected with an electric extrusion rod, and an extrusion rod capable of controlling the floating rod, and a floating rod capable of controlling mechanism is sleeved on the floating rod, and a floating rod capable of the floating rod, the controller is electrically connected with the waterproof touch switch, and the controller can be controlled to be opened by the controller through the mode of electrically connecting the controller with the waterproof touch switch when the waterproof touch switch is triggered to be opened.

Preferably, the elastic guide tightening mechanism comprises a guide pipe fixedly connected to the bottom of the partition board, a second guide rod is sleeved in the guide pipe in a sliding mode, the bottom end of the second guide rod is fixedly connected with the top of the plugging plate, the guide pipe is matched with the second guide rod, the effect of vertical guide is achieved for the plugging plate, the floating plate is sleeved on the second guide rod, the pressure sensor is located in the guide pipe, an extension spring in a stretching state is fixedly connected between the detection end of the pressure sensor and the top end of the second guide rod, the pressure sensor can detect the tension of the extension spring, the pressure sensor is electrically connected with the controller, the left end of the L-shaped rod is fixedly connected with the right side of the second guide rod, and the filter screen is movably sleeved on the second guide rod.

Preferably, the extrusion mechanism comprises a pull rod fixedly connected to the top of the pressure sensor, the top end of the pull rod extends to the upper portion of the partition plate and is fixedly connected with a moving block, the partition plate is sleeved on the pull rod in a sliding mode, an extrusion block is fixedly connected to the bottom end of an output shaft of the electric telescopic rod and is sleeved on the pull rod in a sliding mode, the top of the extrusion block is in movable contact with the bottom of the moving block, and the extrusion block is located above the L-shaped rod and matched with the L-shaped rod.

Preferably, fixedly connected with battery on the top inner wall of sampling tube, battery and electric telescopic handle electric connection, electric telescopic handle's the fixed and electric connection in front side has wireless remote control switch, and wireless remote control switch matches and is provided with outside remote controller, and wireless remote control switch and outside remote controller's setting can realize remote control's effect.

Preferably, the guide way has all been seted up to the bottom both sides of sampling tube, the inner wall of guide way and the outside movable contact of the first guide bar that corresponds.

Preferably, the top of baffle has been seted up the rectangle and has been perforated, and the outside bonding cladding of L shape pole has first rubber seal, and the outside and the fenestrate inner wall movable contact of rectangle of first rubber seal realize the sealing connection between rectangle perforation and the L shape pole through first rubber seal.

Preferably, the top of the floating plate is provided with a first through hole, the outer diameter of the guide pipe is smaller than the inner diameter of the first through hole, the right side of the top of the floating plate is provided with a rectangular hole, and the inner wall of the rectangular hole is in sliding connection with the outer side of the L-shaped rod.

Preferably, the top fixedly connected with connecting rod of sampling tube, the top fixedly connected with of connecting rod hangs the ring, and the top bonding of shutoff board is fixed with the elastic sealing rubber, and the top of elastic sealing rubber and the bottom swing joint of sampling tube through shutoff board and the cooperation of elastic sealing rubber, can realize the sealed shutoff to the sampling tube bottom.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the bottom end of the sampling cylinder can be opened during sampling through the matching of the plugging plate, the elastic sealing rubber, the floating plate, the elastic guide tightening mechanism, the waterproof touch switch, the extruding mechanism, the controller and the electric telescopic rod, and the bottom end of the sampling cylinder can be automatically and stably plugged when the water quantity in the sampling cylinder reaches a certain quantity after sampling is finished, so that the condition of insufficient sampling water quantity can be effectively avoided;

2. the extrusion mechanism, the elastic guide tightening mechanism, the electric telescopic rod and the controller are matched, so that the sealing performance can be automatically adjusted when the sealing effect is not ideal, the sealing performance can be effectively controlled, and the sealing stability is improved;

the utility model discloses a tight mechanism of elastic guide, the shutoff board, float the board, waterproof touch switch, the setting of electric telescopic handle and controller, can open the bottom of sampler barrel when the sample, and can accomplish the back at the sample, the shutoff is stabilized to the bottom of sampler barrel automatically when the water yield in the sampler barrel reaches a certain amount, can effectually avoid the not enough condition of sample water yield, through extrusion mechanism, the setting of pressure sensor and controller, can be when sealed effect is unsatisfactory, adjust the leakproofness automatically, thereby can effectively control its leakproofness, improve its shutoff sealing stability.

Drawings

Fig. 1 is a schematic perspective view of a water stop for drilling layered water pumping according to the present invention;

fig. 2 is a schematic sectional view of a drilling layered water stopper according to the present invention;

fig. 3 is an enlarged schematic view of a portion a in fig. 2.

In the figure: 100. a sampling tube; 101. a suspension ring; 1. a filter screen; 2. a plugging plate; 3. an elastic sealing rubber sheet; 4. a first guide bar; 5. a second guide bar; 6. a guide tube; 7. a floating plate; 8. an L-shaped rod; 9. a partition plate; 10. an extension spring; 11. a moving block; 12. a pressure sensor; 13. a waterproof touch switch; 14. an electric telescopic rod; 15. extruding the block; 16. a pull rod; 17. a controller; 18. and (4) a storage battery.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, a water stopper for drilling and layered water pumping comprises a sampling tube 100 with an opening at the bottom end and a water stopper body installed in the sampling tube 100, wherein a connecting rod is fixedly connected to the top end of the sampling tube 100, a hanging ring 101 is fixedly connected to the top end of the connecting rod, and the sampling tube 100 can be driven to move downwards by connecting the hanging ring 101 with an external downward device, the water stopper body comprises a plugging plate 2 which is in sealed movable contact with the bottom of the sampling tube 100, first guide rods 4 are fixedly connected to both sides of the top of the plugging plate 2, the sampling tube 100 is slidably sleeved on the two first guide rods 4, guide grooves are formed in both sides of the bottom end of the sampling tube 100, the inner walls of the guide grooves are in movable contact with the outer sides of the corresponding first guide rods 4, the first guide rods 4 have a vertical guiding effect on the plugging plate 2, a sealing rubber sheet 3 is fixedly bonded to the top of the plugging plate 2, the top of the elastic sealing rubber sheet 3 is in movable contact with the bottom end of the sampling tube 100, the elastic sealing rubber sheet 3 is matched with the plugging plate 2, and used for sealing and plugging the bottom end of the plugging tube 100;

a filter screen 1 is fixedly installed in the sampling cylinder 100, wherein the outer side of the filter screen 1 is in movable contact with the inner wall of the sampling cylinder 100, both sides of the bottom of the filter screen 1 are fixedly connected with first installation pieces, both inner walls of both sides of the sampling cylinder 100 are fixedly connected with second installation pieces, threaded holes are formed in the top of the first installation piece and the top of the second installation piece, two threaded holes which are opposite up and down are internally threaded and sleeved with the same T-shaped fixing bolt, the bottom inner wall of the T-shaped fixing bolt is in movable contact with the bottom of the corresponding first installation piece, the first installation piece is matched with the second installation piece through the T-shaped fixing bolt, so that the filter screen 1 is fixedly installed, a partition plate 9 is fixedly installed in the sampling cylinder 100, and the partition plate 9 divides the sampling cylinder 100 into two areas;

an elastic guide tightening mechanism is fixedly connected between the bottom of the partition plate 9 and the top of the plugging plate 2, wherein the elastic guide tightening mechanism comprises a guide pipe 6 fixedly connected to the bottom of the partition plate 9, a second guide rod 5 is slidably sleeved in the guide pipe 6, a limiting hole is formed in the inner wall of the left side of the guide pipe 6, a limiting block in sliding connection with the limiting hole is fixedly connected to the left side of the second guide rod 5, the limiting block is matched with the limiting hole and plays a limiting and anti-falling effect on the second guide rod 5, the bottom end of the second guide rod 5 is fixedly connected with the top of the plugging plate 2, the filter screen 1 is movably sleeved on the second guide rod 5, a through hole for the second guide rod 5 to pass through is formed in the top of the filter screen 1, a pressure sensor 12 located in the guide pipe 6 is arranged below the partition plate 9, a tension spring 10 in a tension state is fixedly connected between the detection end of the pressure sensor 12 and the top end of the second guide rod 5, the tension and extrusion force of the tension spring 10 are detected by the pressure sensor 12, and an L-shaped rod 8 is fixedly connected to the right side of the second guide rod 5;

the top end of the L-shaped rod 8 extends to the upper side of the partition plate 9, a rectangular through hole is formed in the top of the partition plate 9, a first sealing rubber sheet is bonded and coated on the outer side of the L-shaped rod 8, the outer side of the first sealing rubber sheet is in movable contact with the inner wall of the rectangular through hole, sealing connection between the L-shaped rod 8 and the rectangular through hole is achieved through the first sealing rubber sheet, the top of the pressure sensor 12 is fixedly connected with an extrusion mechanism extending to the upper side of the partition plate 9, an electric telescopic rod 14 fixedly connected with an output shaft and the top of the extrusion mechanism is embedded and installed on the inner wall of the top of the sampling cylinder 100, the extrusion mechanism comprises a pull rod 16 fixedly connected to the top of the pressure sensor 12, the top end of the pull rod 16 extends to the upper side of the partition plate 9 and is fixedly connected with a moving block 11, the partition plate 9 is slidably sleeved on the pull rod 16, a first pull rod through hole for the pull rod 16 to penetrate is formed in the top of the partition plate 9, an extrusion block 15 is fixedly connected with an extrusion block 15, the bottom of the output shaft of the electric telescopic rod 14 is slidably sleeved on the pull rod 16, the extrusion block 15 is capable of supporting the extrusion block and capable of supporting the extrusion block 11 and capable of supporting the L-shaped extrusion block 8 and capable of moving upward to match with the extrusion block 11;

a floating plate 7 is slidably sleeved on the L-shaped rod 8, the floating plate 7 is sleeved on the second guide rod 5, a first through hole is formed in the top of the floating plate 7, the second guide rod 5 is located in the first through hole and is not in contact with the inner wall of the first through hole, the outer diameter of the guide tube 6 is smaller than the inner diameter of the first through hole, a rectangular hole is formed in the right side of the top of the floating plate 7, the inner wall of the rectangular hole is in sliding connection with the outer side of the L-shaped rod 8, the bottom of the partition plate 9 is fixedly connected with a waterproof touch switch 13 which is located above the floating plate 7 and is matched with the floating plate 7, a controller 17 which is electrically connected with the electric telescopic rod 14 is fixedly connected to the inner wall of the top of the sampling cylinder 100, the pressure sensor 12 is electrically connected with the controller 17, and the pressure sensor 12 is electrically connected with the controller 17 in a mode that the signal can be transmitted to the controller 17 when the pressure sensor 12 detects that the extrusion force of the pressure sensor is lower than a preset value, and the controller 17 is electrically connected with the waterproof touch switch 13;

fixedly connected with battery 18 on the top inner wall of sampling tube 100, battery 18 and 14 electric connection of electric telescopic handle, battery 18 supplies power for electric telescopic handle 14, wherein seted up the hole of charging on the top inner wall of sampling tube 100, the hole of charging is located the top of battery 18, the downthehole movable sleeve that charges is equipped with the rubber end cap, the rubber end cap blocks the hole of charging, the fixed and electric connection of front side of electric telescopic handle 14 has wireless remote control switch, wireless remote control switch matches and is provided with the external remote controller, wireless remote control switch and external remote controller matched with mode, can realize remote control's effect, the utility model discloses an elasticity leads straining mechanism, closure plate 2, floating plate 7, waterproof touch switch 13, electric telescopic handle 14 and controller 17's setting, can open the bottom of sampling tube 100 when taking a sample, and can be after the sample is accomplished, automatic stabilize the shutoff to the bottom of sampling tube 100 when the water yield reaches a certain amount, can effectually avoid the condition that the sample water yield is not enough, through the setting of extrusion mechanism, pressure sensor 12 and controller 17, can be when sealed the effect is unsatisfactory, thereby can effectively adjust its leakproofness to control shutoff, its stability is effectively improved.

The working principle is as follows: when the sampling device is used, the whole sampling cylinder 100 can be moved downwards into a required drilling hole for sampling through the suspension ring 101, when the sampling cylinder is moved downwards to a required depth, the wireless remote control switch is controlled through an external remote controller to control the forward start of the electric telescopic rod 14, the output shaft of the electric telescopic rod 14 drives the corresponding extrusion block 15 to move downwards, when the extrusion block 15 moves downwards to be contacted with the top end of the L-shaped rod 8, the extrusion block 15 continuously moves to extrude the L-shaped rod 8 to move downwards, the L-shaped rod 8 drives the second guide rod 5 to move downwards, the second guide rod 5 slides downwards in the guide pipe 6 and stretches the stretching spring 10, the second guide rod 5 drives the corresponding plugging plate 2 to move downwards, the plugging plate 2 drives the elastic sealing rubber sheet 3 to move downwards, the elastic sealing rubber sheet 3 is separated downwards from the sampling cylinder 100, and plugging of the sampling cylinder 100 is released, at the moment, water in the drilled hole passes through the filter screen 1 to enter the sampling tube 100 under water pressure, and along with the entering of the water, the water level in the sampling tube 100 gradually rises, when the water level moves upwards to be contacted with the bottom of the floating plate 7, under the buoyancy action of the water, the floating plate 7 slides upwards on the L-shaped rod 8, and when the floating plate 7 moves upwards to be contacted with the waterproof touch switch 13, the water amount in the sampling tube 100 is proved to reach a certain amount, at the moment, the waterproof touch switch 13 is triggered to be opened, the waterproof touch switch 13 transmits a signal to the controller 17, the controller 17 controls the electric telescopic rod 14 to be reversely started, the output shaft of the electric telescopic rod 14 drives the corresponding extrusion block 15 to move upwards and release the extrusion force on the L-shaped rod 8, at the moment, the elastic force of the extension spring 10 in a stretching state drives the second guide rod 5 to move upwards, and the second guide rod 5 drives the plugging plate 2 to move upwards, when the plugging plate 2 drives the elastic sealing rubber sheet 3 to move upwards to be in contact with the bottom of the sampling cylinder 100, the plugging plate 2 is limited to continue moving, and at the moment, the plugging plate 2 is matched with the elastic sealing rubber sheet 3 to plug the bottom end of the sampling cylinder 100, so that the bottom end of the sampling cylinder 100 can be automatically plugged when the water quantity in the sampling cylinder 100 reaches a certain quantity, the condition of insufficient water quantity can be effectively avoided, and the sampling stability is improved;

and the extension spring 10 in the extension state can always provide an upward tightening force for the second guide rod 5, the second guide rod 5 provides an upward tightening force for the plugging plate 2 and the elastic sealing rubber sheet 3, so that the top of the elastic sealing rubber sheet 3 can always be in close contact with the bottom end of the sampling tube 100, the plugging tightness is improved, the condition of water leakage at the bottom end of the sampling tube 100 can be effectively reduced, the situation of weakened elasticity is easily caused by the extension spring 10 after long-time use, and further the tightening force for the plugging plate 2 and the elastic sealing rubber sheet 3 is reduced, so that the situation of unsatisfactory sealing effect can be caused, when the elasticity of the extension spring 10 is weakened, the tension for the pressure sensor 12 is reduced, when the pressure sensor 12 detects that the tension is lower than a preset value, the pressure sensor 12 transmits a signal to the controller 17, and the controller 17 controls the electric telescopic rod 14 to be reversely started, an output shaft of the electric telescopic rod 14 drives an extrusion block 15 to move upwards and extrude a moving block 11 to move upwards, the moving block 11 drives a pressure sensor 12 to move upwards through a pull rod 16, the pressure sensor 12 stretches an extension spring 10 while moving upwards, the extension spring 10 drives a second guide rod 5 to move upwards, the second guide rod 5 drives a plugging plate 2 to move upwards and extrude an elastic sealing rubber 3, so that the elastic sealing rubber 3 is in close contact with the bottom end of the sampling tube 100 again, when the pressure sensor 12 moves upwards, the tension of the extension spring 10 is increased, the tension of the pressure sensor 12 is increased, when the pressure sensor 12 detects that the tension of the pressure sensor reaches a preset value, the electric telescopic rod 14 is controlled to be closed through a controller 17, the sealing performance can be automatically adjusted when the sealing effect is not ideal, and the sealing performance can be effectively controlled, the sealing stability is improved.

The above, only be the embodiment of the preferred of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, which are designed to be replaced or changed equally, all should be covered within the protection scope of the present invention.

Claims (8)

1. A water stopper for layered water pumping in a drilling hole comprises a sampling tube (100) with an opening at the bottom and a water stopper body arranged in the sampling tube (100), and is characterized in that the water stopper body comprises a plugging plate (2) which is in sealing movable contact with the bottom of the sampling tube (100), two sides of the top of the plugging plate (2) are fixedly connected with first guide rods (4), the sampling tube (100) is sleeved on the two first guide rods (4) in a sliding manner, a filter screen (1) is fixedly arranged in the sampling tube (100), a partition plate (9) is fixedly arranged in the sampling tube (100), an elastic guide tightening mechanism is fixedly connected between the bottom of the partition plate (9) and the top of the plugging plate (2), elastic guide tightens up right side fixedly connected with L shape pole (8) of mechanism, the top of L shape pole (8) extends to the top of baffle (9), the below of baffle (9) is equipped with pressure sensor (12) with elastic guide tightens up mechanism fixed connection, the top fixedly connected with of pressure sensor (12) extends to the extrusion mechanism of baffle (9) top, inlay on the top inner wall of sampling tube (100) and adorn electric telescopic handle (14) that are fixed with output shaft and extrusion mechanism's top fixed connection, sliding sleeve is equipped with showy board (7) on L shape pole (8), showy board (7) cover is established on elastic guide tightens up the mechanism, the bottom fixedly connected with of baffle (9) is located showy board (7) top and rather than matched with waterproof touch switch (13) The top inner wall of the sampling tube (100) is fixedly connected with a controller (17) electrically connected with an electric telescopic rod (14), and the controller (17) is electrically connected with a waterproof touch switch (13).

2. The water stopper for drilling layered water pumping according to claim 1, wherein the elastic guide tightening mechanism comprises a guide pipe (6) fixedly connected to the bottom of the partition plate (9), a second guide rod (5) is sleeved in the guide pipe (6) in a sliding manner, the bottom end of the second guide rod (5) is fixedly connected with the top of the plugging plate (2), a floating plate (7) is sleeved on the second guide rod (5), a pressure sensor (12) is located in the guide pipe (6), an extension spring (10) in a stretching state is fixedly connected between the detection end of the pressure sensor (12) and the top end of the second guide rod (5), the pressure sensor (12) is electrically connected with the controller (17), the left end of the L-shaped rod (8) is fixedly connected with the right side of the second guide rod (5), and the filter screen (1) is movably sleeved on the second guide rod (5).

3. The water stopper for drilling layered water pumping according to claim 2, wherein the extrusion mechanism comprises a pull rod (16) fixedly connected to the top of the pressure sensor (12), the top end of the pull rod (16) extends to the upper side of the partition plate (9) and is fixedly connected with a moving block (11), the partition plate (9) is slidably sleeved on the pull rod (16), the bottom end of the output shaft of the electric telescopic rod (14) is fixedly connected with an extrusion block (15), the extrusion block (15) is slidably sleeved on the pull rod (16), the top of the extrusion block (15) is in movable contact with the bottom of the moving block (11), and the extrusion block (15) is located above the L-shaped rod (8) and is matched with the L-shaped rod (8).

4. The water stop for stratified water pumping in a borehole as claimed in claim 1, wherein the inner wall of the top of the sampling tube (100) is fixedly connected with a storage battery (18), the storage battery (18) is electrically connected with the electric telescopic rod (14), the front side of the electric telescopic rod (14) is fixedly and electrically connected with a wireless remote control switch, and the wireless remote control switch is provided with an external remote controller in a matching way.

5. The water stop for the layered water pumping of the drill hole according to claim 1, wherein the two sides of the bottom end of the sampling tube (100) are both provided with guide grooves, and the inner walls of the guide grooves are movably contacted with the outer sides of the corresponding first guide rods (4).

6. The water stop for drilling layered water pumping according to claim 1, wherein a rectangular through hole is formed in the top of the partition plate (9), a first sealing rubber sheet is bonded and coated on the outer side of the L-shaped rod (8), and the outer side of the first sealing rubber sheet is in movable contact with the inner wall of the rectangular through hole.

7. The water stopper for drilling and layered water pumping according to claim 2, wherein the top of the floating plate (7) is provided with a first through hole, the outer diameter of the guide pipe (6) is smaller than the inner diameter of the first through hole, the right side of the top of the floating plate (7) is provided with a rectangular hole, and the inner wall of the rectangular hole is in sliding connection with the outer side of the L-shaped rod (8).

8. The water stop for drilling layered water pumping according to claim 1, wherein a connecting rod is fixedly connected to the top end of the sampling tube (100), a hanging ring (101) is fixedly connected to the top end of the connecting rod, an elastic sealing rubber (3) is fixedly bonded to the top of the plugging plate (2), and the top of the elastic sealing rubber (3) is in movable contact with the bottom end of the sampling tube (100).

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