Small-caliber underground water depth-keeping sampler

Abstract

The utility model discloses a small-caliber underground water fixed-depth sampler which comprises a sampling pipe, an upper sealing plug is fixedly connected to the top of the sampling pipe, a lower sealing plug is fixedly connected to the bottom of the sampling pipe, water inlets are formed in the outer wall of the lower sealing plug at equal intervals, a water inlet channel is formed in the lower sealing plug, and a water outlet channel is formed in the lower sealing plug. The water inlet channel is respectively communicated with the sampling pipe and the water inlet, the inner wall of the water inlet channel is in clearance fit with a sealing ball, the bottom of the lower sealing plug is provided with a counterweight ball, the top of the upper sealing plug is provided with a gas guide pipe, and the gas guide pipe is communicated with the sampling pipe. The utility model relates to the technical field of underground water sampling, and solves the problems that in the prior art, a sampling bottle for fixed-depth sampling of underground water is provided with a pressure regulating mechanism, an exhaust mechanism and a pre-tightening spring bottom plate which are complex in structure, so that the overall structure of a sampling device is complex, and the use reliability and the service life of the sampling device are influenced. And the manufacturing cost is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to underground water sampling technical field, concretely is a small caliber underground water fixed depth sampler. BACKGROUND

[0002] In the underground water environmental pollution investigation work, generally uses the ordinary sampler such as sampling bottle to collect underground water sample. When fixed depth sampling is carried out, generally through setting pressure regulating mechanism, exhaust mechanism and pre-tight spring bottom plate on the sampling bottle, the water inlet of the sampling bottle can be tightly sealed by pre-tight spring before reaching the sampling depth, and the sampling bottle reaches the sampling depth by adjusting the pressure regulating mechanism according to the sampling depth, and the water enters the sampling by lifting the bottom plate through pressure difference. In the prior art, the pressure regulating mechanism, exhaust mechanism and pre-tight spring bottom plate with complex structure are arranged on the sampling bottle for underground water fixed depth sampling, so that the overall structure of the sampling device is relatively complex, the use reliability and service life of the sampling device are affected, and the manufacturing cost is relatively high. SUMMARY

[0003] In view of the defects of the prior art, the utility model provides a small caliber underground water fixed depth sampler, which solves the problems that the pressure regulating mechanism, exhaust mechanism and pre-tight spring bottom plate with complex structure are arranged on the sampling bottle for underground water fixed depth sampling in the prior art, the overall structure of the sampling device is relatively complex, the use reliability and service life of the sampling device are affected, and the manufacturing cost is relatively high.

[0004] To achieve the above object, the utility model realizes the following technical scheme: a small caliber underground water fixed depth sampler, including the sampling pipe, the top of the sampling pipe is fixedly connected with upper sealing plug, the bottom of the sampling pipe is fixedly connected with lower sealing plug, the outer wall of the lower sealing plug is equidistantly provided with water inlet, the inside of the lower sealing plug is provided with water inlet channel, the water inlet channel is connected with the sampling pipe and water inlet respectively, the inner wall of the water inlet channel is gap matched with the closed ball, the bottom of the lower sealing plug is provided with the counterweight ball, the top of the upper sealing plug is provided with the gas guide pipe, the gas guide pipe is connected with the sampling pipe, the one end of the gas guide pipe is communicated with the tee joint, the one end of the tee joint is communicated with the manual exhaust valve, the one end of the tee joint is communicated with the valve away from the gas guide pipe, the side of the tee joint and the valve is provided with the air pressure gauge, the one end of the valve is communicated with the air pump away from the tee joint, the top of the upper sealing plug is provided with the measuring rope.

[0005] Preferably, the one end of the measuring rope is fixedly connected with the quick connection ring close to the upper sealing plug, the quick connection ring is matched with the upper sealing plug, the one end of the measuring rope is provided with the take-up reel away from the upper sealing plug, the outer wall of the measuring rope is equidistantly provided with the depth mark.

[0006] Preferably, the air guide pipe is provided with a pneumatic quick connector at the end away from the air pump, and the pneumatic quick connector is connected with the upper sealing plug.

[0007] Preferably, the lower sealing plug is provided with a limiting rod at the top of the inner wall of the water inlet channel, and the limiting rod is connected with the sealing ball.

[0008] Preferably, the inner walls of the upper sealing plug and the lower sealing plug are provided with sealing pads, and the sealing pads are connected with the sampling tube.

[0009] The utility model provides a kind of small-bore groundwater fixed-depth sampler.It has the following beneficial effects: the small-bore groundwater fixed-depth sampler, through the cooperation between sampling tube, upper sealing plug, lower sealing plug, water inlet, water inlet channel, sealing ball, counterweight ball, air guide pipe, tee joint, hand-operated exhaust valve, barometer, valve, air pump and measuring rope, the water inlet channel is closed by sealing ball, high-pressure gas is injected into sampling bottle, the air pressure in sampling bottle and the water pressure of sampling depth point are kept consistent, after reaching specified depth, by slow pressure relief, the sealing ball is lifted by the internal and external pressure difference of sampling bottle, groundwater of specified depth can be entered into sampling tube through water inlet and water inlet channel, when the internal and external pressure of sampling bottle is consistent, the sealing ball is closed to water inlet channel under the action of gravity, the sampling of groundwater of specified depth is completed, sampling bottle can realize the sampling of groundwater by air charging and discharging, without using additional exhaust mechanism and pre-tightening spring bottom plate, the overall structure of sampling bottle can be simplified, to improve the use reliability and service life of sampling bottle, and manufacturing cost can be reduced, which helps to improve the market competitiveness of groundwater sampler.

[0010] Through the cooperation between upper sealing plug, measuring rope, quick connection ring, take-up device and depth mark, measuring rope can be quickly connected with upper sealing plug through quick connection ring, the connection convenience of measuring rope and sampling tube can be improved, and the convenience of measuring rope unwinding or winding can be improved by take-up device, the lowering depth of sampling tube can be accurately grasped according to depth mark of different positions, to make sampling tube accurately reach predetermined depth, which helps to improve the accuracy and sampling efficiency of groundwater fixed-depth sampling. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 It is Figure 1 It is a local enlarged view of area A in the middle;

[0013] Figure 3 It is Figure 1 It is a local enlarged view of area B in the middle;

[0014] Figure 4 It isFigure 1 Local enlarged view of the middle C region.

[0015] In the figure: 1, sampling tube; 2, upper sealing plug; 3, lower sealing plug; 4, water inlet; 5, water inlet channel; 6, sealing ball; 7, counterweight ball; 8, air guide pipe; 9, tee joint; 10, manual air exhaust valve; 11, air pressure gauge; 12, valve; 13, air pump; 14, measuring rope; 15, quick connection ring; 16, take-up device; 17, depth marker; 18, pneumatic quick connector; 19, limiting rod; 20, sealing gasket. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0017] In the prior art, a sampling bottle of a groundwater depth sampling device is provided with a complex pressure regulating mechanism, an air exhaust mechanism and a pre-tightening spring bottom plate, so that the overall structure of the sampling device is relatively complex, the use reliability and service life of the sampling device are affected, and the manufacturing cost is high.

[0018] Therefore, the utility model provides a small-bore groundwater depth sampler, which is formed by the cooperation of a sampling tube, an upper sealing plug, a lower sealing plug, a water inlet, a water inlet channel, a sealing ball, a counterweight ball, an air guide pipe, a tee joint, a manual air exhaust valve, an air pressure gauge, a valve, an air pump and a measuring rope. The water inlet channel is closed by the sealing ball. High-pressure gas is injected into the sampling bottle. The air pressure in the sampling bottle is adjusted according to the water pressure at the groundwater sampling depth point. The air pressure in the sampling bottle is kept consistent with the water pressure at the sampling depth point. After reaching the specified depth, the sealing ball is lifted by the pressure difference between the inside and outside of the sampling bottle through slow pressure relief, so that the groundwater at the specified depth enters the sampling tube through the water inlet and the water inlet channel. When the pressure inside and outside the sampling bottle is consistent, the sealing ball is closed to the water inlet channel under the action of gravity. The sampling bottle can be taken out of the underground well, the groundwater at the specified depth is sampled, the sampling bottle is inflated and deflated by the air guide pipe, the additional air exhaust mechanism and pre-tightening spring bottom plate are not needed, the overall structure of the sampling bottle is simplified, the use reliability and service life of the sampling bottle are improved, and the manufacturing cost is reduced.

[0019] Through the person skilled in the art, all electrical components in the case are connected to their adapted power supply through wires, and appropriate controllers and encoders should be selected according to actual conditions to meet the control requirements. The specific connection and control sequence should be referred to the working principle below. The order of work between each electrical component is completed by electrical connection. The detailed connection means is a well-known technology in the art. The working principle and process are mainly introduced below, and the electrical control is not described.

[0020] By Figures 1-4 It can be known that a small-bore underground water depth sampler comprises a sampling pipe 1, an upper sealing plug 2 fixedly connected to the top of the sampling pipe 1, a lower sealing plug 3 fixedly connected to the bottom of the sampling pipe 1, water inlets 4 equidistantly arranged on the outer wall of the lower sealing plug 3, a water inlet channel 5 arranged in the lower sealing plug 3, the water inlet channel 5 being in communication with the sampling pipe 1 and the water inlets 4 respectively, a sealing ball 6 gap-fitted on the inner wall of the water inlet channel 5, the density of the sealing ball 6 being greater than that of water, a counterweight ball 7 arranged at the bottom of the lower sealing plug 3, the counterweight ball 7 helping the sampler to reach the predetermined underground water depth more stably and accurately by using its own gravity, a gas guide pipe 8 arranged at the top of the upper sealing plug 2, the gas guide pipe 8 being in communication with the sampling pipe 1, a three-way joint 9 communicated with the end of the gas guide pipe 8 away from the sampling pipe 1, a manual exhaust valve 10 communicated with one end of the three-way joint 9, a valve 12 communicated with the end of the three-way joint 9 away from the gas guide pipe 8, an air pressure gauge 11 arranged on the side of the three-way joint 9 and the valve 12 close to each other, and a gas pump 13 communicated with the end of the valve 12 away from the three-way joint 9, and a measuring rope 14 arranged at the top of the upper sealing plug 2.

[0021] In the implementation process, it is particularly worth pointing out that the sampling bottle main structure of the groundwater depth sampler is composed of the cooperation between the sampling tube 1, the upper sealing plug 2 and the lower sealing plug 3, the sampling tube 1, the upper sealing plug 2 and the lower sealing plug 3 are all made of stainless steel, the upper sealing plug 2 and the lower sealing plug 3 are fixed with the sampling tube 1 through bolts to form a closed upper and lower sampling tube 1, the cooperation between the lower sealing plug 3, the water inlet 4, the water inlet channel 5 and the sealing ball 6, the water inlet channel 5 is designed to be thick at the top and thin at the bottom, the bottom of the water inlet channel 5 is connected with the water inlet 4, the sealing ball 6 is at the bottom of the water inlet channel 5 to form a seal for the water inlet channel 5, and the density of the sealing ball 6 is greater than that of water, the cooperation between the sampling tube 1, the upper sealing plug 2, the lower sealing plug 3, the water inlet 4, the water inlet channel 5, the sealing ball 6, the air pipe 8, the three-way joint 9, the manual exhaust valve 10, the air pressure gauge 11, the valve 12, the air pump 13 and the measuring rope 14, before the sampling bottle is put into the underground well, high-pressure gas is injected into the sampling tube 1 through the air pump 13, the sealing ball 6 is at the bottom of the water inlet channel 5 under the action of the high-pressure gas in the sampling tube 1 to form a seal for the water inlet channel 5 to prevent gas leakage, after the gas injection is completed, the valve 12 is closed, the air pressure in the sampling bottle is observed through the air pressure gauge 11, and the air pressure in the sampling bottle is adjusted through the manual exhaust valve 10 according to the groundwater sampling depth, so that the air pressure in the sampling bottle is consistent with the water pressure at the sampling depth point, the sampling bottle, the air pipe 8 and the measuring rope 14 are put into the underground well at the same time, when the specified depth is not reached, the sealing ball 6 keeps the water inlet channel 5 closed under the action of the air pressure to prevent the groundwater from entering the inside of the sampling bottle during the lowering process, when the specified depth is reached, the air pressure in the sampling bottle is consistent with the water pressure at the sampling depth point, the manual exhaust valve 10 is opened to exhaust the gas in the sampling bottle through the air pipe 8, at this time, the air pressure in the sampling bottle is less than the water pressure at the sampling depth point, under the action of the pressure difference, the sealing ball 6 is lifted upwards to remove the closure of the water inlet channel 5, the groundwater at the sampling depth point enters the inside of the sampling tube 1 through the water inlet 4 and the water inlet channel 5, when the inside and outside pressures of the sampling tube 1 are consistent, the sealing ball 6 re-closes the water inlet channel 5 under the action of gravity, the manual exhaust valve 10 is closed after the exhaust is completed, and the sampling bottle is taken out of the underground well, the air pipe 8 is separated from the upper sealing plug 2, the sampling bottle is inverted, the interface between the upper sealing plug 2 and the air pipe 8 is aligned with the sampling container, at this time, the sealing ball 6 removes the closure of the water inlet channel 5, air enters the inside of the sampling tube 1 through the water inlet 4 and the water inlet channel 5, the groundwater in the sampling bottle flows out through the interface between the upper sealing plug 2 and the air pipe 8, the groundwater sampling at the specified depth point is completed, the counterweight ball 7 helps the sampling bottle to reach the predetermined groundwater depth more stably and accurately by using its own gravity,The cooperation between the sampling tube 1, the upper sealing plug 2, the lower sealing plug 3, the water inlet 4, the water inlet channel 5, the sealing ball 6, the counterweight ball 7, the air guide pipe 8, the three-way joint 9, the manual exhaust valve 10, the air pressure gauge 11, the valve 12, the air pump 13 and the measuring rope 14 utilizes the sealing ball 6 to form a seal on the water inlet channel 5, injects high-pressure gas into the sampling bottle, adjusts the air pressure in the sampling bottle according to the water pressure of the groundwater sampling depth point, keeps the air pressure in the sampling bottle consistent with the water pressure of the sampling depth point, slowly releases the pressure after reaching the specified depth, uses the pressure difference between the inside and outside of the sampling bottle to lift the sealing ball 6, makes the groundwater at the specified depth enter the sampling tube 1 through the water inlet 4 and the water inlet channel 5, and when the pressure inside and outside the sampling bottle is consistent, the sealing ball 6 forms a seal on the water inlet channel 5 under the action of gravity, so that the sampling bottle can be taken out of the underground well, the groundwater sampling at the specified depth is realized, the sampling bottle can realize groundwater sampling by charging and discharging air through the air guide pipe 8, no additional exhaust mechanism and pre-tightening spring bottom plate are needed, the overall structure of the sampling bottle is simplified, the use reliability and service life of the sampling bottle are improved, and the manufacturing cost is reduced, wherein the specific model of the air pump 13 is not limited, and it only needs to meet the use requirements,

[0022] Further, the end of the measuring rope 14 close to the upper sealing plug 2 is fixedly connected with a quick connection ring 15, the quick connection ring 15 is connected with the upper sealing plug 2 in cooperation, and the end of the measuring rope 14 away from the upper sealing plug 2 is provided with a take-up device 16, and the outer wall of the measuring rope 14 is provided with depth marks 17 at equal intervals;

[0023] In the specific implementation process, it is particularly worth pointing out that the measuring rope 14 can be quickly connected with the upper sealing plug 2 through the quick connection ring 15, the connection convenience of the measuring rope 14 and the sampling tube 1 is improved, the convenience of unwinding or winding the measuring rope 14 is improved through the take-up device 16, the lowering depth of the sampling tube 1 can be accurately mastered according to the depth marks 17 at different positions, the sampling tube 1 can accurately reach the predetermined depth, and the accuracy and efficiency of the groundwater depth sampling are improved;

[0024] Further, the end of the air guide pipe 8 away from the air pump 13 is provided with a pneumatic quick connector 18, the pneumatic quick connector 18 is used for quickly connecting the air guide pipe 8 and the upper sealing plug 2, and the pneumatic quick connector 18 is connected with the upper sealing plug 2 in cooperation;

[0025] In the specific implementation process, it is particularly worth pointing out that the pneumatic quick connector 18 is used for quickly connecting the air guide pipe 8 and the upper sealing plug 2, improving the connection convenience of the air guide pipe 8 and the sampling tube 1, and further enabling the sampling device to be quickly installed and disassembled;

[0026] Further, the lower sealing plug 3 is provided with a limiting rod 19 on the top of the inner wall of the water inlet channel 5, the limiting rod 19 is used for limiting the sealing ball 6, avoiding the sealing ball 6 from separating from the water inlet channel 5, and the limiting rod 19 is connected with the sealing ball 6 in a matched mode;

[0027] In the specific implementation process, it is worth pointing out that the limiting rod 19 is used for limiting the sealing ball 6, avoiding the sealing ball 6 from separating from the water inlet channel 5, and when the depth sampling is completed, the sealing ball 6 can timely seal the water inlet channel 5;

[0028] Further, the inner walls of the upper sealing plug 2 and the lower sealing plug 3 are provided with sealing pads 20, and the sealing pads 20 are connected with the sampling pipe 1 in a matched mode;

[0029] In the specific implementation process, it is worth pointing out that through the cooperation between the sampling pipe 1, the upper sealing plug 2, the lower sealing plug 3 and the sealing pads 20, the sealing between the sampling pipe 1 and the upper sealing plug 2 and the lower sealing plug 3 is realized, and the sealing performance of the inner cavity of the sampling pipe 1 is ensured.

[0030] It should be noted that in this text, relational terms such as first and second and the like are used merely to distinguish one entity or action from another, without necessarily requiring or implying that there is any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof are intended to cover non-exclusive inclusions, so that a process, method, article, or equipment including a series of elements includes not only those elements, but also other elements not explicitly listed, or other elements inherent to such a process, method, article, or equipment. Without more limitations, the statement "includes a limited element" does not exclude the presence of additional identical elements in the process, method, article, or equipment including the element.

[0031] In the utility model, unless there is definite stipulation and limitation, the terms "mounting", "setting", "connecting", "fixing", "screw connecting" and the like should be understood in a broad sense, for example, can be fixed connection, also can be detachable connection, or be integrated, can be mechanical connection, also can be electrical connection, can be direct connection, also can pass through intermediate medium indirectly connect, can be the communication of two elements or the interaction of two elements, unless there is definite limitation, for the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0032] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A small-bore ground water depth-specific sampler comprising a sampling tube (1), characterized in that: The top of the sampling pipe (1) is fixedly connected with an upper sealing plug (2), the bottom of the sampling pipe (1) is fixedly connected with a lower sealing plug (3), the outer wall of the lower sealing plug (3) is equidistantly provided with a water inlet (4), the inside of the lower sealing plug (3) is provided with a water inlet channel (5), the water inlet channel (5) is respectively communicated with the sampling pipe (1) and the water inlet (4), the inner wall of the water inlet channel (5) is gap-fitted with a sealing ball (6), the bottom of the lower sealing plug (3) is provided with a counterweight ball (7), the top of the upper sealing plug (2) is provided with an air guide pipe (8), the air guide pipe (8) is communicated with the sampling pipe (1), one end of the air guide pipe (8) away from the sampling pipe (1) is communicated with a three-way joint (9), one end of the three-way joint (9) is communicated with a manual exhaust valve (10), one end of the three-way joint (9) away from the air guide pipe (8) is communicated with a valve (12), the side of the three-way joint (9) and the valve (12) close to each other is provided with an air pressure gauge (11), one end of the valve (12) away from the three-way joint (9) is communicated with an air pump (13), the top of the upper sealing plug (2) is provided with a measuring rope (14).

2. A small-bore groundwater depth-specific sampler according to claim 1, characterized in that: The end of the measuring rope (14) close to the upper sealing plug (2) is fixedly connected with a quick connection ring (15), the quick connection ring (15) is connected with the upper sealing plug (2), the end of the measuring rope (14) away from the upper sealing plug (2) is provided with a take-up device (16), the outer wall of the measuring rope (14) is equidistantly provided with a depth mark (17).

3. A small-bore depth-specific groundwater sampler according to claim 1, wherein: The end of the air guide pipe (8) away from the air pump (13) is provided with a pneumatic quick connector (18), the pneumatic quick connector (18) is connected with the upper sealing plug (2).

4. The small-bore depth-specific groundwater sampler of claim 1, wherein: The inner wall top of the lower sealing plug (3) located in the water inlet channel (5) is provided with a limiting rod (19), the limiting rod (19) is connected with the sealing ball (6).

5. A small-bore groundwater depth-specific sampler according to claim 1, characterized in that: The inner walls of the upper sealing plug (2) and the lower sealing plug (3) are both provided with sealing gaskets (20), the sealing gaskets (20) are connected with the sampling pipe (1).

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