Automatic sampling device for hydrogeological survey

Abstract

The invention discloses an automatic sampling device for hydrogeological survey, comprising a support frame, wherein a motor, a negative pressure pump and a heat sealing mechanism are respectively fixedly mounted on the outer wall of the support frame, a transmission shell is rotatably mounted on the inner wall of the support frame, and a sampling part is arranged on the outer wall of the transmission shell; wherein the sampling part is arranged in a tubular shape and is spirally wound on the outer wall of the transmission shell, a negative pressure cavity is arranged inside the transmission shell, the interior of the sampling part is communicated with the air inlet end of the negative pressure pump through the negative pressure cavity, the output end of the motor is fixedly connected to the transmission shell, the heat sealing mechanism is suitable for linking the support frame to seal the end of the sampling part, and the sampling part plays the role of liquid diversion and liquid storage each time sampling is performed, thereby eliminating the use of a diversion tube and a hanging rope, so that the inner wall of the sampling part is in contact with the collected liquid for the first time each time sampling is performed, thereby avoiding cross contamination of liquids during multiple uses, and also avoiding the cleaning burden of a single structure during multiple uses.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogeological survey, and in particular to an automatic sampling device for hydrogeological survey. Background Art

[0002] Hydrogeology is a branch of geology, which refers to various changes and movement phenomena of groundwater in nature. It mainly studies the distribution and formation of groundwater, the physical properties and chemical composition of groundwater, groundwater resources and their rational utilization, the adverse effects of groundwater on engineering construction and mining and their prevention and control, etc. At present, the analysis of the causes, distribution and movement of groundwater mainly relies on sampling of groundwater, which is mostly done by using pre-prepared containers and then moving them longitudinally through lifting equipment. This not only makes it easy for the containers to not match the actual on-site sampling needs, but also the containers are of many sizes and models, making them cumbersome and difficult to use. In addition, they require additional ropes and conduit lifting and diversion structures, which are not only not conducive to carrying but also easily cause cross-contamination of different liquids after repeated use, affecting the final monitoring data, and requiring repeated cleaning. Therefore, an automatic sampling device for hydrogeological survey is proposed. Summary of the invention

[0003] The embodiments according to the present invention are intended to solve or improve at least one of the above technical problems.

[0004] A first object of an embodiment of the present invention is to provide an automatic sampling device for hydrogeological survey.

[0005] An embodiment of the first aspect of the invention provides an automatic sampling device for hydrogeological survey, comprising a support frame, on the outer wall of which a motor, a negative pressure pump and a heat sealing mechanism are respectively fixedly mounted, and a transmission shell is rotatably mounted on the inner wall of the support frame, and a sampling part is arranged on the outer wall of the transmission shell; wherein, the sampling part is arranged in a tubular shape and is spirally wound around the outer wall of the transmission shell, a negative pressure chamber is provided inside the transmission shell, the interior of the sampling part is connected with the air inlet end of the negative pressure pump through the negative pressure chamber, the output end of the motor is fixedly connected to the transmission shell, and the heat sealing mechanism is suitable for linking the support frame to seal the end of the sampling part.

[0006] According to an automatic sampling device for hydrogeological survey provided by the present invention, the expansion and contraction of the body and the storage of the monitoring liquid are realized through the sampling part arranged in a tubular shape, and the coordinated use of the contact hanging rope and the sampling container when sampling at different depths in the prior art is avoided, and the operation and carrying burden are reduced. At the same time, the sampling part is heat-pressed and sealed at the end by a heat-sealing mechanism, so that the sampling part can avoid the waste of additional storage space after sampling samples with different sampling requirements under the premise of preparing the storage volume in advance, and the sampling part is sealed according to the actual sampling amount, and the sampling part is sealed as it is when multiple samplings are taken, so that the volume of each sampling and the sampling amount are matched, and the setting of a large container and an overly small container are avoided. On the one hand, the carrying burden after sampling is reduced as much as possible, and on the other hand, the actual sampling amount requirement on site is guaranteed. The sampling part is spirally wound on the transmission shell, so that the sampling part can be expanded and contracted with the cooperation of the motor and the transmission shell, which is convenient for carrying and meeting the sampling requirements at different depths.

[0007] Each time sampling is taken, the sampling part serves as both the liquid diversion and liquid storage function, eliminating the use of a diversion tube and a hanging rope, so that the inner wall of the sampling part contacts the collected liquid for the first time each time sampling is taken, avoiding cross-contamination of liquids during multiple uses, resulting in inaccurate surveys, and also avoiding the cleaning burden of multiple uses of a single structure.

[0008] In addition, the technical solution provided according to the embodiment of the present invention may also have the following additional technical features:

[0009] In any of the above technical solutions, a guide hole is provided on the right side wall of the transmission housing, and the inner wall of the guide hole is rotatably connected to the outer wall of the air inlet end of the negative pressure pump.

[0010] In this technical solution, the setting of the guide hole makes the connection between the transmission housing and the air inlet end of the negative pressure pump more stable, which helps to ensure that the assembly connection with the negative pressure pump is not affected when the transmission housing rotates, and at the same time enhances the connectivity between the inside of the transmission housing and the inside of the negative pressure pump and the sealing to the outside.

[0011] In any of the above technical solutions, the outer wall of the transmission housing is fixedly connected to the conical connecting nozzle, and the interior of the conical connecting nozzle is connected to the interior of the transmission housing, and the outer wall of the conical connecting nozzle fits the inner wall of the sampling part.

[0012] In this technical solution, the conical connecting nozzle makes it convenient to plug and fix the sampling part each time the sampling part is loaded and connected. The conical outer wall of the conical connecting nozzle is set so that the sampling part can be tightly plugged and fixed when the conical connecting nozzle is plugged in. On the one hand, it can prevent the sampling part from loosening when it is spirally wound on the transmission housing. On the other hand, it can ensure the internal connection stability and external sealing between the sampling part and the transmission housing.

[0013] In any of the above technical solutions, an annular reinforcement rib is integrally formed on the outer wall of the sampling portion, and the annular reinforcement rib is coaxially arranged with the sampling portion.

[0014] In this technical solution, an annular reinforcement rib is integrally formed on the outer wall of the sampling part, which helps to stably support the side wall of the sampling part and prevent it from collapsing inward when subjected to external pressure, causing internal blockage and different circulation. The sampling part can also ensure smooth transmission of internal pressure when spirally wound, thereby absorbing external liquid.

[0015] In any of the above technical solutions, the heat sealing mechanism includes: a lower heat sealing plate and an upper heat sealing plate hingedly connected to the lower heat sealing plate, and electric heating tubes are installed on the surfaces of the lower heat sealing plate and the upper heat sealing plate away from each other, and the lower heat sealing plate is installed on the outer wall of the support frame.

[0016] In this technical solution, the lower heat sealing plate and the upper heat sealing plate are hingedly connected so as to be able to perform repeated opening and closing actions. When the sampling part is placed between the lower heat sealing plate and the upper heat sealing plate, the sampling part can be pressed by pressure and heat through pre-heating of the electric heating tube, so that the inside is blocked and the inner walls are fused and adhered to each other, thereby achieving sealing at the end of the sampling part.

[0017] In any of the above technical solutions, a heat sealing groove is provided on the upper surface of the lower heat sealing plate, and an arc-shaped heat sealing strip is fixedly connected to the side wall of the upper heat sealing plate; wherein the arc-shaped heat sealing strip cooperates with the heat sealing groove to press and seal the end of the sampling portion.

[0018] In this technical solution, the side walls of the sampling part are easily deformed by pressure through the cooperation and pressing of the heat sealing groove and the arc-shaped heat sealing strip, which helps the inner walls to adhere and fuse with each other when heated, and helps to stabilize the sealing of the end of the sampling part.

[0019] In any of the above technical solutions, a conical heat sealing strip is fixedly mounted on the side wall of the upper heat sealing plate.

[0020] In this technical solution, the addition of a conical heat sealing strip allows for a second heat pressing seal to be performed after the first heat pressing seal at the end of the sampling portion, and cutting is performed through the sharp protruding edges of the conical heat sealing strip, thereby achieving a double-layer seal with a sealing cavity and achieving the effect of cutting and detaching the sampling portion with the sample, making it convenient for multiple uses.

[0021] In any of the above technical solutions, a sealing ring is fixedly installed on the outer wall of the air inlet end of the negative pressure pump, and the sealing ring is arranged at the left and right ends of the guide hole.

[0022] In this technical solution, the sealing rings arranged on the left and right can seal the connection between the guide hole and the negative pressure pump, thereby improving the sealing effect of the active part and avoiding air leakage that causes the negative pressure chamber to be unable to form a negative pressure absorption effect on the sampling part.

[0023] In any of the above technical solutions, the support frame includes: a support ring and an annular guide plate rotatably connected to the support ring, and the inner wall of the annular guide plate is fixedly connected to the outer wall of the transmission housing; wherein two support rings are provided and are symmetrically arranged along the center of the transmission housing.

[0024] In this technical solution, through the rotational coordination of the support ring and the annular guide plate, the sampling part is subject to left and right position restriction when rotating, thereby avoiding shaking during transportation of the transmission housing or the device, affecting the placement of the sampling part, and ensuring the smooth winding and unfolding of the sampling part.

[0025] In any of the above technical solutions, the support frame also includes: a support rod and a fixing plate fixedly connected to one end of the support rod, the other end of the support rod is fixedly connected to the support ring side wall, and the fixing plate side walls are respectively fixedly connected to the motor and the negative pressure pump.

[0026] In this technical solution, through the cooperation of the support rod and the fixed plate, a distance is created between the motor and the negative pressure pump and the annular guide plate, thereby preventing the annular guide plate from affecting the normal operation of the motor and the negative pressure pump, thereby ensuring the normal operation of all parts of the device.

[0027] Additional aspects and advantages of embodiments according to the present invention will become apparent in the following description or may be learned through practice of embodiments according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention;

[0029] Figure 2 It is a schematic diagram of a transmission housing partially cut away and its connection structure of the present invention;

[0030] Figure 3 It is a schematic diagram of the support ring and its connection structure of the present invention;

[0031] Figure 4 for Figure 1 Enlarged view of point A in the middle;

[0032] Figure 5 It is a schematic diagram of the one-way valve structure of the present invention.

[0033] in, Figures 1 to 5 The corresponding relationship between the reference numerals and the component names is as follows:

[0034] 1 support frame, 101 support ring, 102 annular guide plate, 103 support rod, 104 fixed plate, 105 fixed rod, 106 bottom plate, 2 motor, 3 negative pressure pump, 4 transmission housing, 401 negative pressure chamber, 402 guide hole, 403 conical connecting nozzle, 5 sampling part, 501 annular reinforcement rib, 502 one-way valve, 503 bevel, 6 heat sealing mechanism, 601 lower heat sealing plate, 6011 heat sealing groove, 602 upper heat sealing plate, 6021 arc heat sealing strip, 6022 conical heat sealing strip, 603 electric heating tube, 604 handle, 7 sealing ring, 8 insulation rod. DETAILED DESCRIPTION

[0035] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0037] See also Figure 1-5 An embodiment of the first aspect of the present invention provides an automatic sampling device for hydrogeological exploration, including a support frame 1, on the outer wall of the support frame 1 are respectively fixedly installed a motor 2, a negative pressure pump 3 and a heat sealing mechanism 6, the inner wall of the support frame 1 is rotatably installed a transmission shell 4, and the outer wall of the transmission shell 4 is provided with a sampling part 5; wherein the sampling part 5 is tubular and spirally wound on the outer wall of the transmission shell 4, a negative pressure chamber 401 is opened inside the transmission shell 4, the interior of the sampling part 5 is connected with the air inlet end of the negative pressure pump 3 through the negative pressure chamber 401, the output end of the motor 2 is fixedly connected to the transmission shell 4, and the heat sealing mechanism 6 is suitable for linking the support frame 1 to seal the end of the sampling part 5.

[0038] According to an automatic sampling device for hydrogeological survey provided by the present invention, the sampling part 5 arranged in a tubular shape realizes the folding and unfolding of the body and the storage of the monitoring liquid, avoids the use of the contact suspension rope and the sampling container in the existing sampling at different depths, reduces the operation and carrying burden, and at the same time, the end of the sampling part 5 is heat-pressed and sealed by the heat sealing mechanism 6, so that the sampling part 5 can avoid the waste of additional storage space after sampling samples with different sampling requirements on the premise of preparing the storage volume in advance, and the sampling part 5 is sealed according to the actual sampling amount, and the sampling part 5 is sealed as it is when multiple samplings are taken, so that the volume and sampling amount of each sampling are matched, avoiding the setting of large containers and too small containers, on the one hand, reducing the carrying burden after sampling as much as possible, and on the other hand, ensuring the actual sampling amount requirements on site, the sampling part 5 is spirally wound on the transmission shell 4, so that the sampling part 5 can be unfolded and retracted with the cooperation of the motor 2 and the transmission shell 4, which is convenient for carrying and meeting the sampling requirements at different depths;

[0039] Each time sampling is performed, the sampling part 5 plays the role of liquid diversion and liquid storage, eliminating the use of a diversion tube and a hanging rope, so that the inner wall of the sampling part 5 contacts the collected liquid for the first time each time sampling is performed, avoiding cross-contamination of liquids during multiple uses, resulting in inaccurate surveys, and also avoiding the cleaning burden of a single structure during multiple uses. The device is powered by a battery to facilitate mobile work in the field.

[0040] Furthermore, the sampling part 5 adopts a hose structure made of plastic, which is convenient for hot pressing, sealing and winding.

[0041] Furthermore, a one-way valve 502 is connected to the liquid inlet port of the sampling part 5. The one-way valve 502 is made of PP material and can be used in large quantities or for single use. An angle 503 is provided at the connecting end of the one-way valve 502 and the sampling part 5, specifically a ten-degree inclination, to ensure stable connection between the one-way valve 502 and the sampling part 5.

[0042] In any of the above embodiments, a guide hole 402 is provided on the right side wall of the transmission housing 4 , and the inner wall of the guide hole 402 is rotatably connected to the outer wall of the air inlet end of the negative pressure pump 3 .

[0043] In this embodiment, by setting the guide hole 402, the connection between the transmission housing 4 and the air inlet end of the negative pressure pump 3 is made more stable, which helps to ensure that the assembly connection with the negative pressure pump 3 is not affected when the transmission housing 4 rotates, and at the same time enhances the connectivity between the inside of the transmission housing 4 and the inside of the negative pressure pump 3 and the sealing to the outside.

[0044] In any of the above embodiments, the outer wall of the transmission housing 4 is fixedly connected to the conical connection nozzle 403 , and the interior of the conical connection nozzle 403 is connected to the interior of the transmission housing 4 , and the outer wall of the conical connection nozzle 403 fits the inner wall of the sampling portion 5 .

[0045] In this embodiment, the conical connecting nozzle 403 makes it convenient to plug and fix the sampling part 5 each time the sampling part 5 is loaded and connected. The conical outer wall of the conical connecting nozzle 403 is set so that the sampling part 5 can be tightly plugged and fixed when the conical connecting nozzle 403 is plugged in. On the one hand, when the sampling part 5 is spirally wound on the transmission housing 4, it can avoid loosening. On the other hand, it can ensure the internal connection stability and external sealing between the sampling part 5 and the transmission housing 4.

[0046] In any of the above embodiments, an annular reinforcing rib 501 is integrally formed on the outer wall of the sampling portion 5 , and the annular reinforcing rib 501 is coaxially arranged with the sampling portion 5 .

[0047] In this embodiment, an annular reinforcing rib 501 is integrally formed on the outer wall of the sampling portion 5, which helps to stably support the side wall of the sampling portion 5 and prevent it from collapsing inward when subjected to external pressure, causing internal blockage and different circulation. The sampling portion 5 can also ensure smooth transmission of internal pressure when spirally wound, thereby absorbing external liquid.

[0048] In any of the above embodiments, the heat sealing mechanism 6 includes: a lower heat sealing plate 601 and an upper heat sealing plate 602 hingedly connected to the lower heat sealing plate 601, and an electric heating tube 603 is installed on the surface away from the lower heat sealing plate 601 and the upper heat sealing plate 602, and the lower heat sealing plate 601 is installed on the outer wall of the support frame 1.

[0049] In this embodiment, the lower heat sealing plate 601 and the upper heat sealing plate 602 are hingedly connected to each other so that repeated opening and closing actions can be performed. When the sampling portion 5 is placed between the lower heat sealing plate 601 and the upper heat sealing plate 602, the sampling portion 5 can be pressed by pressure and heat through the pre-heating of the electric heating tube 603, so that the inside is blocked and the inner walls are fused and adhered to each other, thereby achieving sealing at the end of the sampling portion 5.

[0050] Furthermore, the exposed outer walls of the lower heat sealing plate 601, the upper heat sealing plate 602 and the electric heating tube 603 are respectively coated with heat insulation coatings, and copper plates are used for heat transfer at the connection parts between the electric heating tube 603 and the lower heat sealing plate 601 and the upper heat sealing plate 602.

[0051] Furthermore, a handle 604 is fixedly installed on the side wall of the upper heat sealing plate 602 to facilitate the operator to perform the rotation operation of the upper heat sealing plate 602 .

[0052] In any of the above embodiments, a heat sealing groove 6011 is provided on the upper surface of the lower heat sealing plate 601, and an arcuate heat sealing strip 6021 is fixedly connected to the side wall of the upper heat sealing plate 602; wherein the arcuate heat sealing strip 6021 cooperates with the heat sealing groove 6011 to press and seal the end of the sampling portion 5.

[0053] In this embodiment, the side wall of the sampling portion 5 is easily deformed by the cooperation and pressing of the heat sealing groove 6011 and the arc-shaped heat sealing strip 6021, which helps the inner walls to adhere and fuse with each other when heated, and helps to stabilize the sealing of the end of the sampling portion 5.

[0054] Furthermore, the heat-sealing groove 6011 and the arc-shaped heat-sealing strip 6021 are polished and smoothed to avoid adhesion of the heat-sealing groove 6011 and the arc-shaped heat-sealing strip 6021 when the sampling part 5 is hot-pressed and sealed.

[0055] In any of the above embodiments, a conical heat sealing strip 6022 is fixedly installed on the side wall of the upper heat sealing plate 602 .

[0056] In this embodiment, the conical heat sealing strip 6022 is added to enable a second heat pressing seal to be performed after the first heat pressing seal at the end of the sampling portion 5, and cutting is performed through the sharp protruding edges of the conical heat sealing strip 6022, thereby achieving a double-layer seal with a sealing cavity and achieving the effect of cutting and detaching the sampling portion 5 with the sample, which is convenient for multiple uses.

[0057] In any of the above embodiments, a sealing ring 7 is fixedly installed on the outer wall of the air inlet end of the negative pressure pump 3 , and the sealing ring 7 is arranged at the left and right ends of the guide hole 402 .

[0058] In this embodiment, the sealing rings 7 arranged on the left and right can seal the connection between the guide hole 402 and the negative pressure pump 3, thereby improving the sealing effect of the active part and avoiding air leakage that causes the negative pressure chamber 401 to be unable to form a negative pressure absorption effect on the sampling part 5.

[0059] Furthermore, the sealing ring 7 is made of a sheet-like rubber material, so that when air leakage occurs at the guide hole 402, the sealing ring 7 can be deformed to seal the leakage point, thereby ensuring smooth liquid absorption.

[0060] In any of the above embodiments, the support frame 1 includes: a support ring 101 and an annular guide plate 102 rotatably connected to the support ring 101, and the inner wall of the annular guide plate 102 is fixedly connected to the outer wall of the transmission housing 4; wherein, two support rings 101 are provided, and are symmetrically arranged along the left and right center of the transmission housing 4.

[0061] In this embodiment, through the rotational cooperation of the support ring 101 and the annular guide plate 102, the sampling part 5 is subject to the left and right position restriction effect when rotating, thereby avoiding shaking during the transportation of the transmission housing 4 or the device, affecting the placement of the sampling part 5, and ensuring the smooth winding and unfolding of the sampling part 5.

[0062] Furthermore, a heat-insulating rod 8 is fixedly installed on the outside of the support ring 101, and the support ring 101 is fixedly assembled with the lower heat-sealing plate 601 through the heat-insulating rod 8, and the heat-insulating rod 8 is made of ceramic.

[0063] In any of the above embodiments, the support frame 1 also includes: a support rod 103 and a fixing plate 104 fixedly connected to one end of the support rod 103, the other end of the support rod 103 is fixedly connected to the side wall of the support ring 101, and the side walls of the fixing plate 104 are respectively fixedly connected to the motor 2 and the negative pressure pump 3.

[0064] In this embodiment, through the cooperation of the support rod 103 and the fixed plate 104, the motor 2 and the negative pressure pump 3 are distanced from the annular guide plate 102, thereby preventing the annular guide plate 102 from affecting the normal operation of the motor 2 and the negative pressure pump 3, thereby ensuring the normal operation of all parts of the device.

[0065] Furthermore, a fixing rod 105 is fixedly mounted on the lower surface of the support ring 101 , and the lower surfaces of the fixing rods 105 on two corresponding support rings 101 are fixedly connected via a bottom plate 106 , so that the device can be stably placed in a field environment.

[0066] Working principle: Figure 1 The position shown is the working state of the sampling part 5. The motor 2 and the electric heating tube 603 are started for preheating, which drives the transmission shell 4 to rotate, so that the sampling part 5 is gradually expanded, and the end with the one-way valve 502 gradually contacts the water surface to be sampled downward. After reaching the water surface, the negative pressure pump 3 is started to absorb the liquid through the negative pressure cavity 401 of the transmission shell 4 and the inner cavity of the sampling part 5. The amount of liquid absorbed by the sampling part 5 can be obtained by calculating the use time of the negative pressure pump 3. The motor 2 is then reversed to lower the sampling part 5 with liquid and lift it up. The part of the sampling part 5 close to the sampling liquid where no liquid is stored is placed between the upper heat sealing plate 602 and the lower heat sealing plate 601. Through extrusion and heat transfer, the sampling part 5 is heated and extruded to achieve the effect of heat sealing. Then, the one-way valve 502 is removed from the other end and part of the liquid is squeezed out to repeat the hot pressing operation to seal it, or it can be sealed with a wooden cork.

[0067] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0068] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An automatic sampling device for hydrogeological survey, characterized in that: It comprises a support frame (1), wherein a motor (2), a negative pressure pump (3) and a heat sealing mechanism (6) are fixedly mounted on the outer wall of the support frame (1), a transmission housing (4) is rotatably mounted on the inner wall of the support frame (1), and a sampling portion (5) is provided on the outer wall of the transmission housing (4); The sampling portion (5) is tubular and spirally wound around the outer wall of the transmission housing (4); a negative pressure chamber (401) is provided inside the transmission housing (4); the interior of the sampling portion (5) is connected to the air inlet end of the negative pressure pump (3) via the negative pressure chamber (401); the output end of the motor (2) is fixedly connected to the transmission housing (4); and the heat sealing mechanism (6) is adapted to be linked to the support frame (1) so that the end of the sampling portion (5) is sealed; A guide hole (402) is provided on the right side wall of the transmission housing (4), and the inner wall of the guide hole (402) is rotatably connected to the outer wall of the air inlet end of the negative pressure pump (3); The outer wall of the transmission housing (4) is fixedly connected to the conical connection nozzle (403), and the interior of the conical connection nozzle (403) is connected to the interior of the transmission housing (4), and the outer wall of the conical connection nozzle (403) fits the inner wall of the sampling portion (5).

2. The automatic sampling device for hydrogeological survey according to claim 1, characterized in that: An annular reinforcing rib (501) is integrally formed on the outer wall of the sampling portion (5), and the annular reinforcing rib (501) is coaxially arranged with the sampling portion (5).

3. The automatic sampling device for hydrogeological survey according to claim 1, characterized in that: The heat sealing mechanism (6) comprises: a lower heat sealing plate (601) and an upper heat sealing plate (602) hingedly connected to the lower heat sealing plate (601); surfaces of the lower heat sealing plate (601) and the upper heat sealing plate (602) that are separated from each other are provided with electric heating tubes (603); the lower heat sealing plate (601) is installed on the outer wall of the support frame (1); exposed outer walls of the lower heat sealing plate (601), the upper heat sealing plate (602) and the electric heating tubes (603) are respectively coated with heat insulation coatings; and copper plates are used for heat transfer at the connection parts between the electric heating tubes (603) and the lower heat sealing plate (601) and the upper heat sealing plate (602).

4. The automatic sampling device for hydrogeological survey according to claim 3, characterized in that: A heat sealing groove (6011) is provided on the upper surface of the lower heat sealing plate (601), and a curved heat sealing strip (6021) is fixedly connected to the side wall of the upper heat sealing plate (602); Wherein, the arc-shaped heat-sealing strip (6021) cooperates with the heat-sealing groove (6011) to press and seal the end of the sampling portion (5).

5. The automatic sampling device for hydrogeological survey according to claim 4, characterized in that: A conical heat sealing strip (6022) is fixedly mounted on the side wall of the upper heat sealing plate (602).

6. The automatic sampling device for hydrogeological survey according to claim 1, characterized in that: A sealing ring (7) is fixedly mounted on the outer wall of the air inlet end of the negative pressure pump (3), and the sealing ring (7) is arranged at the left and right ends of the guide hole (402).

7. The automatic sampling device for hydrogeological survey according to claim 1, characterized in that: The support frame (1) comprises: a support ring (101) and an annular guide plate (102) rotatably connected to the support ring (101), wherein the inner wall of the annular guide plate (102) is fixedly connected to the outer wall of the transmission housing (4); Wherein, two support rings (101) are provided and are arranged symmetrically along the center of the transmission housing (4).

8. The automatic sampling device for hydrogeological survey according to claim 7, characterized in that: The support frame (1) further comprises: a support rod (103) and a fixing plate (104) fixedly connected to one end of the support rod (103); the other end of the support rod (103) is fixedly connected to a side wall of the support ring (101); and the side walls of the fixing plate (104) are respectively fixedly connected to the motor (2) and the negative pressure pump (3).

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