Underground water fixed-depth sampling device for hydrogeological survey

Abstract

The utility model relates to an underground water fixed depth sampling device for hydrogeological survey, which comprises a negative pressure sampling bottle, the bottom of the negative pressure sampling bottle is provided with a pipeline interface for sampling water to enter or discharge, the pipeline interface is connected with an induction valve, and the induction valve can be pushed to be opened by external water pressure. And the interior of the negative-pressure sampling bottle is communicated with an external water area. According to the technical scheme, the pipeline connector is arranged at the bottom of the negative-pressure sampling bottle, the negative-pressure sampling bottle is communicated with the sensing valve through the pipeline connector, the opening pressure threshold value of the sensing valve can be set, the opening pressure threshold value is adjusted according to the depth needing to be collected, and the sensing valve is opened when the negative-pressure sampling bottle sinks to the depth needing to be collected; water at the depth is sucked under the action of the pressure in the negative pressure sampling bottle to be stored, then the negative pressure sampling bottle is lifted upwards, the pressure borne by the sensing valve in the lifting process is reduced, the sensing valve is recovered to be in the closed state, water at other depths is prevented from being mixed into the sampling bottle, and the sampling accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sampling equipment, in particular to a groundwater fixed-depth sampling device for hydrogeological survey. Background Art

[0002] Hydrogeology is the study of the laws of changes in the quantity and quality of groundwater, as well as the rational use of groundwater or the prevention and control of its hazards. The burial, distribution and movement of groundwater in different environments are different. In order to fully and accurately understand the groundwater situation, it is necessary to sample and process the groundwater through a sampling device, so as to facilitate subsequent hydrogeological research and processing.

[0003] During the collection process, the water quality of groundwater at different depths is different. When sampling water at a specific depth, it is easy to be affected by water at other depths and cause sample mixing. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a groundwater fixed-depth sampling device for hydrogeological survey, so as to solve the problem in the prior art that when sampling water at a specific depth, it is easily affected by water at other depths and causes sample mixing.

[0005] The utility model is achieved through the following technical solutions:

[0006] A groundwater fixed-depth sampling device for hydrogeological surveys includes a negative pressure sampling bottle. A pipe interface for the entry or discharge of sampled water is provided at the bottom of the negative pressure sampling bottle. An induction valve is connected to the pipe interface. The induction valve can be pushed open by external water pressure to connect the interior of the negative pressure sampling bottle with the external water area.

[0007] It is further defined that the induction valve includes a valve body, in which a first channel and a second channel intersecting each other are provided, one end of the first channel is connected to the pipeline interface, a plunger is slidably and sealed in the second channel, one end of the second channel is provided with a first annular end cover, and the other end is provided with a second end cover, a through hole is provided at the end of the plunger close to the first end cover, and an elastic support part is provided between the end of the plunger close to the second end cover and the second end cover, and the other end is kept against the first end cover under the action of the elastic support part. In this state, the through hole is staggered with the first channel, and the through hole is located on the side of the first channel close to the first end cover.

[0008] It is further defined that the second end cover includes a plate body, a sleeve is provided on the outer edge of the plate body, the sleeve is sleeved on the valve body, and is connected to the valve body by threaded cooperation, the center of the plate body is connected to a support rod extending in the same direction as the sleeve, and a sealing plug is provided at one end of the support rod away from the plate body, the sealing plug extends into the second channel, and is sealed with the second channel.

[0009] It is further defined that the plate body is provided with a guide hole communicating with the interior of the sleeve.

[0010] It is further defined that a filter is installed at one end of the first channel away from the pipeline interface.

[0011] It is further defined that the negative pressure sampling bottle includes a bottle body with an open top, a piston sliding and sealingly fitted in the bottle body, and a screw extending upwardly out of the bottle body connected to the top of the piston;

[0012] A support structure is provided at the opening of the bottle body. A support ring sleeved on the outside of the screw is provided on the support structure. An adjusting nut is sleeved on the upper end of the screw. The adjusting nut is located above the support ring.

[0013] It is further defined that the support structure includes an outer retaining ring, which abuts against the opening of the bottle body, and a plurality of support rods evenly distributed along the circumferential direction are provided on the inner side of the outer retaining ring, and one end of the plurality of support rods is connected to the outer retaining ring and the other end is connected to the support ring.

[0014] It is further defined that a collar is connected to the upper end of the screw.

[0015] It is further defined that a pressure sensor is installed on the piston, and a sensing end of the pressure sensor penetrates below the piston.

[0016] The beneficial effects of the present invention are:

[0017] The groundwater fixed-depth sampling device for hydrogeological surveys is configured by arranging a pipe interface at the bottom of a negative pressure sampling bottle, and connecting the sensing valve through the pipe interface. The sensing valve can set a pressure threshold for opening, and the opening pressure threshold is adjusted according to the depth to be sampled. When the negative pressure sampling bottle sinks to the depth to be sampled, the sensing valve opens, and water at that depth is sucked in and stored under the pressure inside the negative pressure sampling bottle. Then, the negative pressure sampling bottle is pulled upward, and the pressure on the sensing valve will be reduced during the pulling process, and the sensing valve will return to a closed state, thereby preventing water from other depths from mixing into the sampling bottle and improving the accuracy of sampling.

[0018] Other advantages, objectives, and features of the present invention will be described in detail in the following description and, to some extent, will be apparent to those skilled in the art upon examination and study of the following or may be learned from practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The three-dimensional Figure 1 ;

[0020] Figure 2 The three-dimensional Figure 2 ;

[0021] Figure 3 This is the main view of the utility model;

[0022] Figure 4 This is a schematic diagram of the internal structure of the utility model;

[0023] Figure 5 Schematic diagram of the structure of the plunger;

[0024] Figure 6 is a structural schematic diagram of the second end cover;

[0025] In the figure: 1. Bottle body; 2. Pipe interface; 3. Valve body; 4. First channel; 5. Second channel; 6. Plunger; 7. First end cover; 8. Through hole; 9. Plate; 10. Sleeve; 11. Support rod; 12. Sealing plug; 13. Diversion hole; 14. Filter; 15. Piston; 16. Support ring; 17. Outer retaining ring; 18. Support rod; 19. Collar; 20. Screw; 21. Adjusting nut; 22. Pressure sensor. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0029] In the above description of the present invention, it should be noted that the terms "one side" and "the other side" and the like indicate positions or locations based on the positions or locations shown in the accompanying drawings, or the positions or locations in which the product of the present invention is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0030] Furthermore, the term "identical" and similar terms do not necessarily require that the components be absolutely identical; slight variations are permitted. The term "perpendicular" simply refers to the positional relationship between components being more perpendicular than "parallel," not that the structure must be perfectly vertical; rather, it can be slightly tilted.

[0031] See also Figure 1-6 The utility model provides a technical solution: a groundwater fixed-depth sampling device for hydrogeological survey, including a negative pressure sampling bottle, a pipe interface 2 for the sampling water to enter or discharge is opened at the bottom of the negative pressure sampling bottle, and an induction valve is connected to the pipe interface 2. The induction valve can be pushed open by external water pressure to connect the inside of the negative pressure sampling bottle with the external water area.

[0032] A rope can be tied to the negative pressure sampling bottle, and the sampling depth of the negative pressure sampling bottle in the water area to be collected can be adjusted by pulling or loosening the rope. The sensing valve serves as the functional structure of the control pipeline interface 2. When the sensing valve is opened, the interior of the negative pressure sampling bottle will be connected to the external water area, and the negative pressure in the negative pressure sampling bottle will draw the water in the external water area into the negative pressure sampling bottle. When the sensing valve is in a closed state, the interior of the negative pressure sampling bottle will be isolated from the external water area.

[0033] During use, set the opening pressure threshold of the sensing valve according to the depth of sampling required, and then place the negative pressure sampling bottle into the water area where sampling is required. When the negative pressure sampling bottle sinks to the depth required for sampling, the sensing valve opens, and the water at that depth is sucked in and preserved under the pressure inside the negative pressure sampling bottle. Then, pull the negative pressure sampling bottle upward. During the pulling process, the pressure on the sensing valve will decrease, and the sensing valve will return to the closed state, preventing water from other depths from mixing into the sampling bottle, thereby improving the accuracy of sampling.

[0034] In this embodiment, the induction valve includes a valve body 3, in which a first channel 4 and a second channel 5 that intersect are provided. One end of the first channel 4 is connected to the pipeline interface 2, and a plunger 6 is slidably and sealed in the second channel 5. One end of the second channel 5 is provided with a first annular end cover 7, and the other end is provided with a second end cover. A through hole 8 is provided at the end of the plunger 6 close to the first end cover 7 and a resilient support portion is provided between the end of the plunger 6 close to the second end cover and the second end cover. Under the action of the resilient support portion, the other end is kept against the first end cover 7. In this state, the through hole 8 is staggered with the first channel 4, and the through hole 8 is located on the side of the first channel 4 close to the first end cover 7.

[0035] The first channel 4 serves as a channel for water to enter the sampling bottle, and the second channel 5 serves as a moving channel for the plunger 6. Both ends are limited by the elastic support part and the first end cover 7 respectively, so that the plunger 6 maintains abutment with the first end cover 7. After sinking to the collection depth, since the first end cover 7 is an annular structure, the water pressure of the external water area will directly act on the end of the plunger 6, pushing the plunger 6 into the second channel 5. During the pushing process, the elastic force of the elastic support part will be overcome until the through hole 8 on the plunger 6 is connected with the first channel 4, so that the inside of the negative pressure sampling bottle can be connected with the external water area.

[0036] In this embodiment, the second end cover includes a plate body 9, and a sleeve 10 is provided on the outer edge of the plate body 9. The sleeve 10 is sleeved on the valve body 3 and connected to the valve body 3 by threaded cooperation. The center of the plate body 9 is connected to a support rod 11 extending in the same direction as the sleeve 10. A sealing plug 12 is provided at one end of the support rod 11 away from the plate body 9. The sealing plug 12 extends into the second channel 5 and is sealed with the second channel 5.

[0037] The plate body 9 is connected to the valve body 3 through a connecting sleeve 10. The sleeve 10 is connected to the valve body 3 through threaded engagement. The engagement length between the threads can be adjusted by rotating to adjust the distance between the plate body 9 and the valve body 3.

[0038] A support rod 11 is connected to the plate body 9, and a sealing plug 12 is connected to the support rod 11. A sealed cavity is formed between the sealing plug 12 and the plunger 6. When the plate body 9 moves along with the sleeve 10, the sealing plug 12 will be driven to move in the first channel 4 through the support rod 11 to change the degree of compression of the air in the sealed cavity. The compressed air in the sealed cavity will form an elastic support portion acting on the end of the plunger 6 to apply a thrust to the plunger 6, and the applied thrust is affected by the degree of compression of the air in the sealed cavity. The degree of compression can be adjusted by rotating the sleeve 10 so as to facilitate adjustment according to different collection depths.

[0039] In this embodiment, the plate body 9 is provided with a guide hole 13 communicating with the interior of the sleeve 10 .

[0040] The guide hole 13 allows the interior of the sleeve 10 to communicate with the outside, thereby preventing the air inside the sleeve 10 from hindering the rotation of the sleeve 10 .

[0041] In this embodiment, a filter screen 14 is installed at one end of the first channel 4 away from the pipe interface 2 .

[0042] The first channel 4 is away from the end of the pipe interface 2 as the inlet end of the water flow entering the negative pressure sampling bottle. By setting the filter 14, the impurity content in the collected water sample can be reduced.

[0043] In this embodiment, the negative pressure sampling bottle includes a bottle body 1 with an opening at the top, a piston 15 slidingly and sealingly fitted inside the bottle body 1, and a screw 20 extending upwardly out of the bottle body 1 connected to the top of the piston 15;

[0044] A support structure is provided at the opening of the bottle body 1 , on which a support ring 16 is provided which is sleeved on the outside of the screw rod 20 . An adjusting nut 21 is sleeved on the upper end of the screw rod 20 , and the adjusting nut 21 is located above the support ring 16 .

[0045] The support ring 16 serves as a supporting structure for the adjusting nut 21, that is, as a supporting structure for the screw 20 and the piston 15. When the sensing valve is in a closed state, the screw 20 can be fixed, and then the adjusting nut 21 can be rotated to move the adjusting nut 21 downward along the screw 20. The screw 20 and the piston 15 will be pulled upward, and a negative pressure will be formed in the space below the piston 15 in the bottle body 1.

[0046] In this embodiment, the support structure includes an outer retaining ring 17, which rests against the opening of the bottle body 1. A plurality of support rods 18 evenly distributed along the circumferential direction are provided on the inner side of the outer retaining ring 17. One end of the plurality of support rods 18 is connected to the outer retaining ring 17, and the other end is connected to the support ring 16.

[0047] The support structure is composed of an outer retaining ring 17 and a plurality of support rods 18 connected to the support ring 16. The support ring 16 is supported on the outer retaining ring 17 through the support rods 18, that is, supported on the opening of the bottle body 1.

[0048] In this embodiment, a collar 19 is connected to the upper end of the screw rod 20 .

[0049] The ring 19 can be used as a connection point with the rope to facilitate the sampling operation.

[0050] In this embodiment, a pressure sensor 22 is installed on the piston 15 , and a sensing end of the pressure sensor 22 penetrates the bottom of the piston 15 .

[0051] The pressure sensor 22 can monitor the pressure in the space below the piston 15 in the bottle body 1. A signal line and a pressure display gauge can be connected to it for observation by the operator. During the sampling process, when the sensing valve is pushed open by water pressure, the negative pressure below the piston 15 in the bottle body 1 will be destroyed and the pressure will change rapidly. This means that the predetermined sampling depth has been reached. The operator can stop lowering the negative pressure sampling bottle. When the collection in the negative pressure sampling bottle is completed, the pressure inside it will return to normal. The operator can pull the negative pressure sampling bottle upward to facilitate monitoring of the collection process of the negative pressure sampling bottle.

[0052] The model of the pressure sensor 22 is MI K-P300.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A groundwater fixed depth sampling device for hydrogeological survey, characterized by: It includes a negative pressure sampling bottle, the bottom of which is provided with a pipe interface for the sampled water to enter or discharge, and the pipe interface is connected to a sensing valve, which can be pushed open by external water pressure to connect the inside of the negative pressure sampling bottle with the external water area; The induction valve includes a valve body, wherein a first channel and a second channel intersecting with each other are formed in the valve body, one end of the first channel is communicated with a pipeline interface, a plunger is slidably and sealingly fitted in the second channel, one end of the second channel is provided with a first annular end cover, and the other end is provided with a second end cover, a through hole is formed transversely through the end of the plunger close to the first end cover, an elastic support portion is provided between the end of the plunger close to the second end cover and the second end cover, and the elastic support portion keeps the other end against the first end cover. In this state, the through hole is staggered with the first channel, and the through hole is located on the side of the first channel close to the first end cover; The negative pressure sampling bottle comprises a bottle body with an opening at the top, a piston sliding and sealingly fitted in the bottle body, and a screw rod extending upwardly out of the bottle body connected to the top of the piston; A support structure is provided at the opening of the bottle body. A support ring sleeved on the outside of the screw is provided on the support structure. An adjusting nut is sleeved on the upper end of the screw. The adjusting nut is located above the support ring.

2. The groundwater fixed depth sampling device for hydrogeological survey according to claim 1, characterized in that: The second end cover includes a plate body, a sleeve is provided on the outer edge of the plate body, the sleeve is sleeved on the valve body, and is connected to the valve body by threaded cooperation, a support rod extending in the same direction as the sleeve is connected to the center of the plate body, a sealing plug is provided at one end of the support rod away from the plate body, the sealing plug extends into the second channel, and is sealed with the second channel.

3. The groundwater fixed depth sampling device for hydrogeological survey according to claim 2, characterized in that: The plate body is provided with a flow guide hole which is communicated with the interior of the sleeve.

4. The groundwater fixed depth sampling device for hydrogeological survey according to claim 1, characterized in that: A filter is installed at one end of the first channel away from the pipeline interface.

5. The groundwater fixed depth sampling device for hydrogeological survey according to any one of claims 1 to 4, characterized in that: The support structure includes an outer retaining ring, which is against the opening of the bottle body. A plurality of support rods evenly distributed along the circumferential direction are provided on the inner side of the outer retaining ring. One end of the plurality of support rods is connected to the outer retaining ring, and the other end is connected to the support ring.

6. The groundwater fixed depth sampling device for hydrogeological survey according to claim 5, characterized in that: The upper end of the screw is connected with a collar.

7. The groundwater fixed depth sampling device for hydrogeological survey according to claim 5, characterized in that: A pressure sensor is installed on the piston, and a sensing end of the pressure sensor penetrates below the piston.

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