Underground water stratified sampling device

Abstract

The utility model discloses an underground water stratified sampling device which comprises a first lifting rope, and one end of the first lifting rope is connected with the upper end of a lifting frame; the sampling rods are slidably installed on the hanging bracket through a horizontally-arranged guide mechanism, the at least three sampling rods are distributed around the center of the hanging bracket in a circumferential array mode, the second hanging rope penetrates through the hanging bracket, the lower end of the second hanging rope is connected with a balance weight structure, and a connecting block is movably arranged in the hanging bracket; a first through hole allowing the first lifting rope to penetrate through is formed in the center of the connecting block, an impact block located above the connecting block is fixedly arranged on the second lifting rope, the size of the impact block is larger than that of the first through hole, and the lower end of the connecting block is connected with the inner ends of at least three sampling rods through a driving mechanism which moves vertically and has component force in the horizontal direction; the impact block is connected with the connecting block through a connecting rope, the sampling container is arranged in the sampling rod, the second lifting rope is repeatedly lifted, the connecting block is continuously impacted, and therefore the sampling rod is inserted into the well wall.

Description

Technical Field

[0001] The utility model relates to the technical field of groundwater sampling, in particular to a groundwater stratified sampling device. Background Art

[0002] In the polluted areas of drinking water sources, landfills or near chemical plants that are major pollution sources, water pollution does not only pollute one water layer, but also pollutes different water layers due to the infiltration effect. When collecting groundwater for testing, it is necessary to sample each water layer separately. When sampling, it is usually necessary to drill a sampling well downwards, and then lower the sampling device to different heights in the sampling well for sampling. Due to the infiltration effect of water, water will seep out of the well wall and flow downwards. Therefore, in order to avoid collecting water from the upper layer flowing down from the well wall when sampling the lower layer, it is usually necessary to insert the sampling rod into the well wall.

[0003] The invention patent of "A groundwater stratified sampling device" with the patent number "CN117367881A" records: including a hanger and a sampling container arranged on the hanger, the sampling device also includes a telescopic mechanism and a counterweight water tank, the counterweight water tank is arranged below the hanger, the telescopic mechanism includes a fixed seat, a sliding seat and a sampling rod, the sampling container is arranged in the sampling rod, the sampling rod is arranged on the sliding seat, the sliding seat forms a sliding connection with the fixed seat, the fixed seat is arranged on the hanger with a downward tilt, the extended end of the sliding seat faces the oblique lower part of the hanger, and the counterweight water tank is connected to the sliding seat by means of a connecting rope. The present invention adopts the method of pulling the inclined sliding seat with the help of the counterweight water tank, and inserts the sampling rod into the water seepage layer of the well wall by the weight of the water in the counterweight water tank, which reduces the number of equipment and the length of the pipeline, is easy to operate, and can ensure the insertion depth, thereby improving the accuracy of water sample collection.

[0004] In the above patent, the sampling rod is slid by the gravity of the weighted water tank and inserted into the well wall for sampling. Since the capacity of the weighted water tank is limited, the gravity that can be applied is limited, and it is difficult to insert the sampling rod into a relatively compacted well wall. Utility Model Content

[0005] In order to solve the above-mentioned deficiencies in the prior art, the utility model proposes a groundwater stratified sampling device.

[0006] In order to achieve the above technical effects, the utility model adopts the following scheme:

[0007] A groundwater stratified sampling device comprises a hanger, a first hanging rope, a second hanging rope, a guide mechanism, a sampling rod, a sampling container, a push rod and a counterweight structure;

[0008] One end of the first suspension rope is connected to the upper end of the suspension bracket;

[0009] The sampling rod is slidably mounted on the hanger through a horizontally arranged guide mechanism, the number of the sampling rods is at least three, and the at least three sampling rods are distributed in a circular array around the center of the hanger, one end of the sampling rod is arranged toward the center of the hanger, and the other end of the sampling rod can be extended out of the hanger by sliding;

[0010] The second suspension rope passes through the hanger, and the lower end of the second suspension rope is connected to the counterweight structure;

[0011] A connecting block is movably provided in the hanger, the center of the connecting block has a first through hole for the first hanging rope to pass through, the second hanging rope is fixedly provided with an impact block located above the connecting block, the size of the impact block is larger than the size of the first through hole, and the lower end of the connecting block is connected to the inner ends of at least three sampling rods by vertical movement and a driving mechanism separated in the horizontal direction;

[0012] The impact block and the connecting block are also connected by a connecting rope;

[0013] The sampling container is arranged in the sampling rod.

[0014] A preferred technical solution is that the driving mechanism includes push rods whose number is consistent with the number of sampling rods and corresponds one to one, and at least three push rods are distributed in a circular array around the first through hole, the upper ends of the push rods are hinged to the connecting block, and the lower ends of the push rods extend obliquely toward the outside and are hinged to the inner ends of the corresponding sampling rods.

[0015] According to a preferred technical solution, the guide mechanism comprises a guide sleeve fixed on the hanger, the guide sleeve matches the sampling rod, and the sampling rod is arranged through the guide sleeve.

[0016] In a preferred technical solution, the sampling rod comprises a sliding rod, a connector, and a plug;

[0017] The sliding rod is slidably mounted on the guide mechanism;

[0018] The connector is arranged at the center of the end surface of the sliding rod facing outward, the connector is cylindrical, an external thread is arranged on the connector, and a placement hole extending into the sliding rod is arranged at the center of the end surface of the connecting head facing outward, the sampling container is a closed collecting tube, the collecting tube matches the placement hole, one end of the collecting tube is inserted into the placement hole, and the other end of the collecting tube extends into the placement hole and an opening is opened at the upper end thereof;

[0019] One end of the plug is provided with a pointed tip, and the end surface of the other end of the plug is provided with a connection groove matching the connector, and the inner wall of the connection groove is provided with an internal thread matching the external thread, and the plug is detachably connected to the sliding rod by being screwed with the connector through the connection groove;

[0020] An extension groove for inserting the collecting pipe is provided at one end of the connecting groove, and a plurality of water seepage holes communicated with the extension groove are provided at the upper end of the plug.

[0021] According to a preferred technical solution, the number of the connecting ropes is at least three and they are distributed in a circular array around the first through hole.

[0022] A preferred technical solution is that the counterweight structure includes a counterweight block and a limit block, the counterweight block has a second through hole for the second lifting rope to pass through and the size of the through hole is smaller than the limit block, the limit block is fixedly connected to the lower end of the second lifting rope, and the counterweight block is passed through the second through hole on the second lifting rope and is located above the limit block.

[0023] Compared with the prior art, the beneficial effects are:

[0024] The utility model has a simple structure and is easy to use. The first lifting rope is used to lower the hanger into the sampling well. When sampling, the second lifting rope is lifted, thereby lifting the impact block and the counterweight structure to a certain height, and then the second lifting rope is prevented from loosening. The impact block descends and hits the connecting block under the drive of the gravity of the counterweight structure. After the connecting block is hit downward, the driving mechanism pushes the sampling rod to move outward, thereby repeatedly lifting the second lifting rope and continuously hitting the connecting block, so that the sampling rod is inserted into the well wall. The force of the gravity acceleration of the counterweight structure hitting the connecting block is much greater than the gravity of the counterweight structure itself, which is convenient for inserting the sampling rod into the well wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a cross-sectional schematic diagram of the utility model;

[0026] Figure 2 yes Figure 1 The enlarged structural diagram of part A in the middle;

[0027] Figure 3 It is a schematic diagram of the sampling rod structure in the utility model;

[0028] Figure 4 It is a schematic diagram of the plug structure in the utility model;

[0029] Figure 5 It is a schematic diagram of the sliding rod structure in the utility model;

[0030] Figure 6 It is a structural schematic diagram of the collecting tube in the utility model being inserted into the sliding rod.

[0031] Figure numerals: 1. hanger; 2. first hanging rope; 3. second hanging rope; 4. impact block; 5. connecting block; 6. first through hole; 7. connecting rope; 8. push rod; 9. guide sleeve; 10. sliding rod; 11. plug; 12. limit block; 13. counterweight block; 14. tip; 15. connector; 16. collecting pipe; 17. connecting groove; 18. seepage hole; 19. internal thread; 20. extension groove; 21. external thread; 22. placement hole; 23. opening. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0033] A groundwater stratified sampling device, comprising a hanger 1, a first hanging rope 2, a second hanging rope 3, a guide mechanism, a sampling rod, a sampling container, a push rod 8 and a counterweight structure;

[0034] One end of the first suspension rope 2 is connected to the upper end of the suspension bracket 1;

[0035] The sampling rod is slidably mounted on the hanger 1 through a horizontally arranged guide mechanism, and the sampling rod slides in the horizontal direction and then is inserted into the well wall. The number of the sampling rods is at least three, and the at least three sampling rods are distributed in a circular array around the center of the hanger 1. One end of the sampling rod is arranged toward the center of the hanger 1, and the other end of the sampling rod can be extended out of the hanger 1 by sliding to be inserted into the well wall.

[0036] The second suspension rope 3 vertically passes through the hanger 1, and the lower end of the second suspension rope 3 is connected to the counterweight structure;

[0037] A connecting block 5 is movably provided in the hanger 1, and a first through hole 6 is provided at the center of the connecting block 5 for the first hanging rope 2 to pass through. A striking block 4 is fixedly provided on the second hanging rope 3 and is located above the connecting block 5. The size of the striking block 4 is larger than the size of the first through hole 6. The lower end of the connecting block 5 is connected to the inner ends of at least three sampling rods by vertical movement and a driving mechanism separated in the horizontal direction. When the driving mechanism receives a vertical external force, it has a horizontal component force for pushing the sampling rod to move horizontally.

[0038] The impact block 4 and the connecting block 5 are also connected by a connecting rope 7;

[0039] The sampling container is arranged in the sampling rod.

[0040] The first lifting rope 2 is used to lower the hanger 1 into the sampling well. When sampling, the second lifting rope 3 is lifted, thereby lifting the impact block 4 and the counterweight structure to a certain height, and then the second lifting rope 3 is prevented from loosening. The impact block 4 descends under the drive of the gravity of the counterweight structure and hits the connecting block 5. After the connecting block 5 is hit downward, the sampling rod is pushed outward by the horizontal force of the driving mechanism, thereby repeatedly lifting the second lifting rope 3 and continuously hitting the connecting block 5, so that the sampling rod is inserted into the well wall. The force of the gravity acceleration of the counterweight structure hitting the connecting block 5 is much greater than the gravity of the counterweight structure itself, which facilitates the insertion of the sampling rod into the well wall. After the sampling is completed, the second lifting rope 3 is lifted, and the impact block 4 rises and pulls the connecting block 5 upward through the connecting rope 7, thereby pulling the sampling rod out of the well wall through the horizontal force of the driving mechanism.

[0041] According to a preferred technical solution, a first mark and a second mark are respectively provided on the first hanging rope 2 and the second hanging rope 3. The second hanging rope 3 lifts the impact block 4. When the impact block 4 pulls the connecting rope 7 to straighten it, the heights of the first mark and the second mark are the same. For reference, when the impact block 4 is lifted to hit the connecting block 5 to insert the sampling rod into the well wall, excessive lifting of the impact block 4 is avoided to cause the sampling rod to be pulled out of the well wall.

[0042] A preferred technical solution is that the driving mechanism includes push rods 8 whose number is consistent with the number of sampling rods and corresponds one to one, and at least three push rods 8 are distributed in a circular array around the first through hole 6, the upper ends of the push rods 8 are hinged to the connecting block 5, and the lower ends of the push rods 8 extend obliquely toward the outside and are hinged to the inner ends of the corresponding sampling rods.

[0043] The vertical force on the connecting block 5 is decomposed into horizontal force through the inclined push rod 8 and transmitted to the sampling rod.

[0044] According to a preferred technical solution, the guide mechanism comprises a guide sleeve 9 fixedly arranged on the hanger 1 , the guide sleeve 9 matches the sampling rod, and the sampling rod is arranged through the guide sleeve 9 .

[0045] According to a preferred technical solution, the sampling rod comprises a sliding rod 10, a connector 15, and a plug 11;

[0046] The sliding rod 10 is slidably mounted on the guide mechanism, the sliding rod 10 matches the guide sleeve 9 and has a polygonal cross section;

[0047] The connector 15 is arranged at the center of the end surface of the sliding rod 10 facing outward, and the connector 15 is integrally arranged with the sliding rod 10. The connector 15 is arranged in a cylindrical shape, and an external thread 21 is arranged on the connector 15. The center of the end surface of the end of the connecting head 15 facing outward has a placement hole extending into the sliding rod 10. The sampling container is a closed collecting tube 16, and the collecting tube 16 matches the placement hole. One end of the collecting tube 16 is inserted into the placement hole, and the other end of the collecting tube 16 extends into the placement hole and has an opening 23 at its upper end;

[0048] One end of the plug 11 is provided with a tip 14, and the end surface of the other end of the plug 11 is provided with a connection groove 17 matching with the connector 15, and the inner wall of the connection groove 17 is provided with an internal thread 19 matching with the external thread 21, and the plug 11 is detachably connected to the sliding rod 10 by screwing with the connector 15 through the connection groove 17;

[0049] An extension groove 20 for inserting the collecting pipe 16 is formed at one end of the connecting groove 17 . The upper end of the plug 11 has a plurality of water seepage holes 18 connected to the extension groove 20 . The water seepage holes 18 are located above the opening 23 of the collecting pipe 16 .

[0050] The plug 11 is fixed to the outer end of the sliding rod 10 for insertion into the well wall. The tip 14 of the plug 11 is arranged to facilitate insertion into the well wall. After the plug 11 is inserted into the well wall, water in the soil layer drips into the opening 23 of the collecting pipe 16 through the seepage hole 18 and thus enters the collecting pipe 16.

[0051] According to a preferred technical solution, the number of the connecting ropes 7 is at least three and they are distributed in a circular array around the first through hole 6 .

[0052] The multiple connecting ropes 7 distributed in a circumferential array make the force applied by the impact block 4 to the connecting block 5 more balanced.

[0053] A preferred technical solution, the counterweight structure includes a counterweight block 13 and a limit block 12, the counterweight block 13 has a second through hole for the second lifting rope 3 to pass through and the size of the second through hole is smaller than the limit block 12, the limit block 12 is fixedly connected to the lower end of the second lifting rope 3, the counterweight block 13 is passed through the second through hole on the second lifting rope 3 and is located above the limit block 12.

[0054] In the description of the present utility model, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present utility model and simplifying the description, 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 utility model.

[0055] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0056] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

Claims

1. A groundwater stratified sampling device, characterized in that: It comprises a hanger (1), a first hanger rope (2), a second hanger rope (3), a guide mechanism, a sampling rod, a sampling container, a push rod (8) and a counterweight structure; One end of the first suspension rope (2) is connected to the upper end of the suspension bracket (1); The sampling rod is slidably mounted on the hanger (1) via a horizontally arranged guide mechanism, the number of the sampling rods is at least three, and the at least three sampling rods are distributed in a circular array around the center of the hanger (1), one end of the sampling rod is arranged toward the center of the hanger (1), and the other end of the sampling rod can be arranged by sliding out of the hanger (1); The second lifting rope (3) passes through the hanger (1), and the lower end of the second lifting rope (3) is connected to the counterweight structure; A connecting block (5) is movably provided in the hanger (1), the center of the connecting block (5) has a first through hole (6) for the first hanging rope (2) to pass through, a striking block (4) located above the connecting block (5) is fixedly provided on the second hanging rope (3), the size of the striking block (4) is larger than the size of the first through hole (6), and the lower end of the connecting block (5) is connected to the inner ends of at least three sampling rods through a driving mechanism that moves vertically and has a force component in the horizontal direction; The impact block (4) and the connecting block (5) are also connected via a connecting rope (7); The sampling container is arranged in the sampling rod.

2. A groundwater stratified sampling device as claimed in claim 1, characterized in that: The driving mechanism comprises push rods (8) whose number is the same as the number of sampling rods and corresponds to each other, and at least three push rods (8) are distributed in a circular array around the first through hole (6), the upper ends of the push rods (8) are hinged to the connecting block (5), and the lower ends of the push rods (8) extend obliquely toward the outside and are hinged to the inner ends of the corresponding sampling rods.

3. A groundwater stratified sampling device as claimed in claim 1, characterized in that: The guide mechanism comprises a guide sleeve (9) fixedly arranged on the hanger (1); the guide sleeve (9) matches the sampling rod; and the sampling rod is arranged through the guide sleeve (9).

4. A groundwater stratified sampling device as claimed in claim 1, characterized in that: The sampling rod comprises a sliding rod (10), a connecting head (15), and a plug (11); The sliding rod (10) is slidably mounted on the guide mechanism; The connector (15) is arranged at the center of the end surface of the sliding rod (10) facing outward, the connector (15) is arranged in a cylindrical shape, and an external thread (21) is arranged on the connector (15). The center of the end surface of the end of the connecting head (15) facing outward has a placement hole extending into the sliding rod (10), and the sampling container is a closed collecting tube (16). The collecting tube (16) matches the placement hole, one end of the collecting tube (16) is inserted into the placement hole, and the other end of the collecting tube (16) extends into the placement hole and has an opening (23) at its upper end; One end of the plug (11) is provided with a tip (14), the end surface of the other end of the plug (11) is provided with a connection groove (17) matching with the connector (15), the inner wall of the connection groove (17) is provided with an internal thread (19) matching with the external thread (21), and the plug (11) is detachably connected to the sliding rod (10) by screwing with the connector (15) through the connection groove (17); An extension groove (20) for inserting the collecting pipe (16) is provided at one end of the connecting groove (17), and a plurality of water seepage holes (18) communicating with the extension groove (20) are provided at the upper end of the plug (11).

5. A groundwater stratified sampling device as claimed in claim 1, characterized in that: The number of the connecting ropes (7) is at least three and they are distributed in a circular array around the first through hole (6).

6. A groundwater stratified sampling device as claimed in claim 1, characterized in that: The counterweight structure comprises a counterweight block (13) and a limiting block (12); the counterweight block (13) has a second through hole for the second suspension rope (3) to pass through and the size of which is smaller than that of the limiting block (12); the limiting block (12) is fixedly connected to the lower end of the second suspension rope (3); the counterweight block (13) is passed through the second through hole on the second suspension rope (3) and is located above the limiting block (12).

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