Aquifer parameter testing device under simulated pumping condition

Abstract

The utility model provides an aquifer parameter testing device under a simulated water pumping condition, which relates to the technical field of bed rock aquifer simulation testing and comprises a sealed outer cylinder, and a sealing seat is arranged at the center line position in the sealed outer cylinder. The upper surface of the sealing seat is rotationally connected with a rotating plate used for spirally installing a hole-shaped small cylinder, the side edge of the sealing seat extends outwards to be provided with a plurality of extending blocks, the bevel gear block rotates, winding of traction ropes can be achieved, the traction ropes are wound on the bevel gear block, and under the traction effect of the traction ropes, the small cylinder can be installed in the sealing seat in a spiral mode. And the sealing seat drives the rotating plate to ascend to the position of sealing the opening of the outer cylinder, so that a worker can conveniently stack the sandy soil with the adjusted compactness on the rotating plate.

Description

Technical Field

[0001] The utility model relates to the technical field of bedrock aquifer simulation tests, and particularly relates to an aquifer parameter test device under simulated pumping conditions. Background Technique

[0002] An aquifer refers to a saturated layer below the soil aeration layer in geology. The pores of its medium are completely filled with water. An aquifer not only has the ability to hold water, but also has the property of allowing a considerable amount of water to permeate through it. It can hold a certain amount of water. When studying an aquifer, a pumping method is often used for pre-simulation tests.

[0003] Therefore, a prior art aquifer parameter test device under simulated pumping conditions, with the publication number:

[0004] CN202018415U. Before the test, according to the sand density standard of the loose aquifer, it is gently placed and loaded between the porous cylinder with wire mesh winding and the small porous cylinder with wire mesh winding to maintain the coupling between the aquifer sand and the side wall. At the same time, close the flow control switch, the water supply switch and the water discharge switch. First, turn on the water inlet switch. After the water tank loaded with the submersible pump is filled with water, turn on the water supply switch, and fill water into the aquifer through the water inlet hole. When the water overflows to a certain water level between the sealed outer cylinder and the porous cylinder with wire mesh winding, adjust the height of the adjustable overflow tank to control the boundary water level of the aquifer. Then, turn on the flow control switch, record the reading of the flow meter, and at the same time record the data of all piezometers. When the water volume and water level reach a certain level, turn off the water inlet switch, and form a test water circulation system through the water tank loaded with the submersible pump, the aquifer, the small porous cylinder with wire mesh winding, the adjustable overflow tank, as well as the water outlet hose, the return water hose, the water outlet connecting pipe and the water supply connecting pipe. Repeat using the overflow tank lifting device to adjust the height of the adjustable overflow tank to control the boundary water level of the aquifer 3 - 4 times. Use the flow meter to record the flow rate per unit time, use the piezometer to record the corresponding water level, and combine the geometric dimensions of the device, and obtain the permeability coefficient and storage coefficient of the aquifer according to the relevant calculation formulas.

[0005] However, both the porous cylinder and the small porous cylinder are installed inside the sealed outer cylinder. That is, due to the depth of the sealed outer cylinder, there is a certain height difference between the porous cylinder and the small porous cylinder. Moreover, due to the gap limitation between the porous cylinder and the small porous cylinder, in order to ensure that the sand of the loose aquifer does not loosen during placement, it is necessary to reduce the depth of the sealed outer cylinder. When the depth of the sealed outer cylinder is relatively high, the sand of the loose aquifer will freely fall into the sealed outer cylinder under the action of gravity at the moment of getting out of hand, which is likely to cause the sand of the loose aquifer to loosen, affect its density, and further affect the final test result. Content of the Utility Model

[0006] The purpose of the present utility model is to solve the problems existing in the prior art, and a test device for aquifer parameters under simulated pumping conditions is proposed.

[0007] To achieve the above purpose, the present utility model adopts the following technical scheme: A test device for aquifer parameters under simulated pumping conditions, including a sealed outer cylinder, a sealing seat is arranged at the center line position inside the sealed outer cylinder, a rotating plate for helically installing a small hole-shaped cylinder is rotatably connected to the upper surface of the sealing seat, and a plurality of extension blocks extend outward from the side of the sealing seat. Guide columns corresponding to the plurality of extension blocks one by one and passing through the extension blocks are fixedly connected along the depth direction of the sealed outer cylinder. A bevel gear block is rotatably connected to the top edge of the outer wall of the sealed outer cylinder corresponding to the guide column. A traction rope passing through the top edge of the guide column and extending to be connected to the side of the extension block is wound around the side of the bevel gear block, and a filter screen is installed on the side of the rotating plate.

[0008] Preferably, the plurality of bevel gear blocks are distributed in a circular array, and a bevel gear ring meshing with the plurality of bevel gear blocks is rotatably connected to the top edge position of the outer wall of the sealed outer cylinder.

[0009] Preferably, a connecting pipe is fixedly connected to the bottom of the sealed outer cylinder, and the top end of the connecting pipe passes through the sealing seat and is used for docking with the bottom end of the small hole-shaped cylinder.

[0010] Preferably, a plurality of support rods distributed in a circular array are embedded and threadedly connected to the edge of the upper surface of the rotating plate. A winding roller for winding the filter screen is inserted into one of the extension blocks, and a rotating rod for pulling one side of the filter screen is rotatably connected to the side of the rotating plate.

[0011] Preferably, the rotating rod is located outside the plurality of support rods, and the filter screen is in the shape of a stainless steel plate.

[0012] Preferably, a spring rod is fixedly connected to the position of the top edge of the rotating plate where the support rod is located, and a sealing pad in contact with the end face of the support rod is rotatably connected to the elastic telescopic end of the spring rod.

[0013] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:

[0014] 1. In the present utility model, by rotating the bevel gear block, the traction rope can be wound. With the traction rope wound around the bevel gear block, under the traction of a plurality of traction ropes, the sealing seat drives the rotating plate to rise to the position of the mouth of the sealed outer cylinder, which is convenient for personnel to stack the sand and soil with adjusted compactness on the rotating plate.

[0015] 2. In the utility model, by toggling the rotating rod, the filter screen wrapped on the winding roller can be unfolded and wrapped around the rotating plate, and the installed support rods can support the inner side of the filter screen to prevent the filter screen from excessively squeezing the sand placed on the rotating plate, and the filter screen is installed on the side of the rotating plate in an unfolded manner. Therefore, when stacking sand and soil, by wrapping the filter screen, it is convenient to ensure that personnel can directly contact the rotating plate and gently stack the sand and soil on the rotating plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional structural schematic diagram of an aquifer parameter testing device under simulated pumping conditions is proposed for the utility model;

[0017] Figure 2 The utility model proposes a device for testing aquifer parameters under simulated pumping conditions. Figure 1 A schematic cross-sectional structure diagram of ;

[0018] Figure 3 The utility model proposes a device for testing aquifer parameters under simulated pumping conditions. Figure 2 A schematic cross-sectional structure diagram of ;

[0019] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0020] Figure 5 for Figure 3 Enlarged view of point B in the middle.

[0021] Legend: 1. Sealing outer cylinder; 2. Bevel gear ring; 3. Support rod; 4. Guide column; 5. Connecting pipe; 6. Sealing seat; 7. Turn plate; 8. Winding roller; 9. Filter screen; 10. Bevel gear block; 11. Traction rope; 12. Extension block; 13. Rotating rod; 14. Spring rod; 15. Sealing gasket. DETAILED DESCRIPTION

[0022] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and 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.

[0023] 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 than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0024] like Figures 1-5As shown, a device for testing aquifer parameters under simulated pumping conditions comprises a sealed outer cylinder 1, a sealing seat 6 is arranged at the center line position of the sealed outer cylinder 1, a rotating plate 7 for spirally installing a hole-shaped small cylinder is rotatably connected to the upper surface of the sealing seat 6, the bottom edge of the outer cylinder wall of the hole-shaped small cylinder is threadedly connected to the rotating plate 7, and the contact portion between the rotating plate 7 and the hole-shaped small cylinder is hollowed out, and a plurality of extension blocks 12 are arranged on the side of the sealing seat 6 extending outward, a guide column 4 corresponding to the plurality of extension blocks 12 and penetrating the extension blocks 12 is fixedly connected in the cylinder depth direction of the sealed outer cylinder 1, a bevel gear block 10 is rotatably connected to the position corresponding to the guide column 4 at the top edge of the outer wall of the sealed outer cylinder 1, a traction rope 11 penetrating the top edge of the guide column 4 and extending to the side of the extension block 12 is wound around the side of the bevel gear block 10, and the plurality of bevel gear blocks 10 are distributed in a circular array , and a bevel gear ring 2 meshing with a number of bevel gear blocks 10 is rotatably connected to the top edge of the outer wall of the sealed outer cylinder 1. The rotation of the meshing bevel gear blocks 10 is achieved by turning the bevel gear ring 2. As shown in the figure, the cross-section of the part of the side of the bevel gear block 10 that is not the tooth surface is T-shaped. Therefore, the traction rope 11 can be wound by rotating the bevel gear block 10. The traction rope 11 is wound around the bevel gear block 10. Under the traction action of the traction ropes 11, the sealing seat 6 drives the rotating plate 7 to rise to the mouth of the sealed outer cylinder 1, so that it is convenient for personnel to pile sand and soil with adjusted density on the rotating plate 7. A filter screen 9 is installed on the side of the rotating plate 7. The filter screen 9 is used to surround the rotating plate 7 for one circle, and can be used as a porous cylinder with a wire mesh in an aquifer parameter testing device under simulated pumping conditions with the publication number: CN202018415U.

[0025] In order to ensure the smooth operation of the device: a connecting pipe 5 is fixedly connected to the bottom of the sealed outer cylinder 1, the top of the connecting pipe 5 passes through the sealing seat 6 and is used to dock with the bottom end of the hole-shaped small cylinder. As shown in the figure, the connecting pipe 5 is also used to connect the water outlet connecting pipe and the pressure measuring tube nozzle in an aquifer parameter testing device under simulated pumping conditions with the publication number: CN202018415U. In addition, the outside of the sealed outer cylinder 1 in this scheme is also configured with the same equipment as that in the aquifer parameter testing device under simulated pumping conditions with the publication number: CN202018415U except for the sealed outer cylinder, and the connection and assembly methods can refer to the aquifer parameter testing device under simulated pumping conditions with the publication number: CN202018415U.

[0026] In order to facilitate the laying of loose aquifer sand: the upper surface edge of the rotating plate 7 is embedded with a plurality of support rods 3 distributed in a circular array, one of the extension blocks 12 is plugged with a winding roller 8 for winding the filter screen 9, the side of the rotating plate 7 is embedded with a rotating rod 13 for pulling one side of the filter screen 9, the rotating rod 13 is located outside the plurality of support rods 3, and the filter screen 9 is in the shape of a stainless steel plate, the top edge of the rotating plate 7 is located at the position of the support rod 3 and is embedded with a spring rod 14 fixedly connected thereto, the elastic telescopic end of the spring rod 14 is rotatably connected to a sealing pad 15 in contact with the end surface of the support rod 3, as shown in the figure, the sealing seat 6 and the rotating plate 7 are raised to the sealing outer After the cylinder 1 is in the mouth position, the support rod 3 is installed in the corresponding position and spirally connected to the rotating plate 7. The winding roller 8 is plugged into the corresponding extension block 12, and the filter screen 9 wound on the winding roller 8 can be unfolded and wrapped around the rotating plate 7 by toggling the rotating rod 13. The installed support rods 3 can support the inner side of the filter screen 9 to prevent the filter screen 9 from excessively squeezing the sand placed on the rotating plate 7. The set spring rod 14 can use the elastic extension of the spring rod 14 when the support rod 3 takes out the rotating plate 7, so that the sealing gasket 15 can seal the installation position of the support rod 3 to prevent sand and gravel from entering and affecting the next installation of the support rod 3.

[0027] Working principle: the bevel gear ring 2 is turned to realize the meshing connection of the bevel gear blocks 10 to rotate and wind the traction rope 11. Under the traction of the traction ropes 11, the sealing seat 6 drives the rotating plate 7 to rise to the position of the cylinder mouth of the sealing outer cylinder 1. The personnel lay the sand on the rotating plate 7 according to the corresponding density, and then install the support rods 3 in sequence. After the installation of the support rods 3 is completed, the winding roller 8 is plugged into the corresponding extension block 12, and the filter wound on the winding roller 8 can be realized by turning the rotating rod 13. The net 9 is unfolded and surrounds the rotating plate 7. Several support rods 3 support the inner side of the filter screen 9. Then, bolts are used to pass through the overlapping hollow parts of the two layers of filter screens 9. Then, the bevel gear ring 2 is reversely turned to realize the rotation of several bevel gear blocks 10 in meshing connection to release the traction rope 11. Under the action of several traction ropes 11, the sealing seat 6 drives the rotating plate 7 to descend to the bottom of the sealing outer cylinder 1, and under the action of gravity, the mouth of the small hole-shaped cylinder installed on the rotating plate 7 fits the top mouth of the connecting pipe 5.

[0028] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A device for testing aquifer parameters under simulated pumping conditions, comprising a sealed outer cylinder (1), characterized in that: A sealing seat (6) is arranged at the center line position of the sealing outer cylinder (1); a rotating plate (7) for spirally mounting a hole-shaped small cylinder is rotatably connected to the upper surface of the sealing seat (6); and a plurality of extension blocks (12) are arranged on the side of the sealing seat (6) extending outward; a guide column (4) corresponding to the plurality of extension blocks (12) and penetrating the extension blocks (12) is fixedly connected in the sealing outer cylinder (1) along the cylinder depth direction; a bevel gear block (10) is rotatably connected at the top edge of the outer wall of the sealing outer cylinder (1) corresponding to the position of the guide column (4); a traction rope (11) penetrating the top edge of the guide column (4) and extending to the side edge of the extension block (12) is wound around the side edge of the bevel gear block (10); and a filter screen (9) is installed on the side edge of the rotating plate (7).

2. The aquifer parameter testing device under simulated pumping conditions according to claim 1, characterized in that: The plurality of bevel gear blocks (10) are distributed in a ring array, and a bevel gear ring (2) meshingly connected with the plurality of bevel gear blocks (10) is rotatably connected to the top edge of the outer wall of the sealing outer cylinder (1).

3. The aquifer parameter testing device under simulated pumping conditions according to claim 1, characterized in that: The bottom of the sealed outer cylinder (1) is fixedly connected to a connecting pipe (5), the top end of the connecting pipe (5) passes through the sealing seat (6) and is used to connect with the bottom end of the hole-shaped small cylinder.

4. The aquifer parameter testing device under simulated pumping conditions according to claim 1, characterized in that: The upper surface edge of the rotating plate (7) is threadedly connected to a plurality of support rods (3) distributed in a circular array, one of the extension blocks (12) is plugged with a winding roller (8) for winding the filter screen (9), and the side edge of the rotating plate (7) is rotatably connected to a rotating rod (13) for pulling one side of the filter screen (9).

5. The aquifer parameter testing device under simulated pumping conditions according to claim 4 is characterized in that: The rotating rod (13) is located outside the plurality of supporting rods (3), and the filter screen (9) is in the shape of a stainless steel plate.

6. The aquifer parameter testing device under simulated pumping conditions according to claim 4 is characterized in that In: The top edge of the rotating plate (7) is located at the position of the supporting rod (3) and is embedded with a spring rod (14) for fixed connection. The elastic telescopic end of the spring rod (14) is rotatably connected to a sealing pad (15) in contact with the end surface of the support rod (3).

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