A multifunctional constant pressure penetration testing system and device

Abstract

The present invention belongs to the technical field of borehole hydrogeological testing, and particularly relates to a multifunctional constant pressure permeability testing system and device, including a downhole device and a ground test system. The downhole device includes: an extension pipe, a water injection and exhaust assembly; a sensor mounting pipe, wherein a sensor assembly electrically connected to the ground test system is provided in the sensor mounting pipe; two plug tubes, wherein a test section connecting pipe is provided between the two embolic tubes, the embolic tube at the top is connected to and axially connected to the bottom of the sensor mounting pipe, and the embolic tube at the bottom is fixedly connected to a clamping head; the embolic tube includes a tube body and a deformation portion sleeved on the outside of the tube body, a slide groove is provided on the outside of the tube body, and the deformation portion is slidably arranged on the outside of the tube body through the slide groove; the clamping head is transmission-connected to a driving portion; and a downhole valve is fixedly connected to the test section connecting pipe. This device can accurately fix the downhole device at a specified position in the borehole through the cooperation of the plug tube and the clamping head, thereby improving the test accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of borehole hydrogeological testing, and in particular relates to a multifunctional constant pressure penetration testing system and device. Background Art

[0002] Borehole hydrogeological test is an important in-situ test method for obtaining permeability parameters of rock mass or rock formation. Water pressure test is a commonly used borehole hydrogeological test method for low permeability rock mass or rock formation, which can adopt steady flow mode or unsteady flow mode.

[0003] Double-plug drilling hydrogeological test equipment is often used in borehole hydrogeological tests. However, during the use of double-plug drilling hydrogeological test equipment, especially after the equipment is lowered to the designated position in the borehole, the plug expands, shortening the overall length of the device, causing the test section to shift and deviate from the expected test area. Therefore, a multifunctional constant pressure penetration test system and device are urgently needed to solve this problem. Summary of the Invention

[0004] The purpose of the present invention is to provide a multifunctional constant pressure penetration testing system and device to solve the above problems.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A multifunctional constant pressure penetration testing system and device, comprising a downhole device and a surface test system, wherein the downhole device comprises:

[0007] An extension pipe, wherein a water injection and exhaust assembly is provided on the top of the extension pipe;

[0008] a sensor installation tube, which is connected to the bottom of the extension tube and is axially connected to the extension tube; and a sensor assembly electrically connected to the ground test system is provided in the sensor installation tube;

[0009] Two embolic tubes, a test section connecting tube is provided between the two embolic tubes, the embolic tube at the top is connected to and axially connected to the bottom of the sensor mounting tube, the embolic tube at the bottom is fixed with a clamping head, and the test section connecting tube is axially connected to the embolic tube; the embolic tube includes a tube body and a deformable portion sleeved on the outside of the tube body, a sliding groove is provided on the outside of the tube body, and the deformable portion is slidably provided on the outside of the tube body through the sliding groove;

[0010] The clamping head is connected to a driving part, and the driving part drives the clamping head to deform and clamp at the bottom of the drill hole;

[0011] A downhole valve is fixedly connected in the test section connecting pipe, and the downhole valve is used to control the connection and disconnection between the test section connecting pipe and the embolization pipe located at the top.

[0012] Optionally, the deformation portion includes:

[0013] Two slip rings are slidably arranged on the outside of the sliding groove, and an elastic part is provided between the two slip rings, and the elastic part is sleeved on the outside of the sliding groove;

[0014] The rubber balloon has two ends fixed to the corresponding sliding rings;

[0015] Electromagnet 1 is embedded in the tube body 1, the electromagnet 1 is located in the middle of the slide groove, and the electromagnet 1 is magnetically connected to the slip ring;

[0016] The tube body is made of insulating material. When the electromagnet is powered on to generate a magnetic field, the two slip rings are attracted to the middle of the electromagnet under the action of the magnetic field, causing the elastic part to be compressed. When the electromagnet is powered off, the magnetic field disappears, and the elastic part drives the two slip rings to reset.

[0017] Optionally, the elastic portion includes a spring, and the spring is sleeved on the outside of the sliding groove.

[0018] Optionally, the test section connecting pipe includes:

[0019] The second tube body has two ends respectively fixed to the corresponding ends of the embolization tube;

[0020] An exhaust hole is provided on the top of the second tube body;

[0021] The water injection hole is arranged at the bottom of the second tube body.

[0022] Optionally, the fixing head includes:

[0023] The rubber head is fixed to the bottom of the embolization tube at the bottom through a mounting plate, and the rubber head is transmission-connected to the driving part.

[0024] Optionally, the driving unit includes:

[0025] a threaded plate, the shaft of which is connected to the bottom of the mounting plate;

[0026] A threaded column is threadedly connected to the middle part of the threaded plate, the bottom end of the threaded column is rotatably connected to the inner wall of the rubber head, the top end of the threaded column passes through the mounting plate and extends upward, passes through the inner cavity formed by the extension tube, the sensor mounting tube, the embolization tube, and the test section connecting tube, and then passes through the middle of the water injection and exhaust assembly.

[0027] Optionally, the downhole valve includes:

[0028] A valve plate is axially connected to the second tube body, the valve plate is provided with two symmetrically arranged water-permeable holes, and a threaded column through hole is provided in the middle of the valve plate for the threaded column to pass through;

[0029] A rotor is rotatably mounted on the valve plate, the rotor and the valve plate being coaxially arranged, and baffles for shielding the water permeable holes are symmetrically fixedly connected to both ends of the rotor;

[0030] The rotation driving part is in driving connection with the rotor, and the rotation driving part is arranged on the valve plate.

[0031] Optionally, the rotation drive unit includes:

[0032] A stator is coaxially arranged on the valve plate and sleeved on the outside of the threaded column through hole, and a plurality of electromagnets 2 are embedded in the stator and are evenly spaced in the circumferential direction;

[0033] Two permanent magnets are symmetrically embedded in the rotor, and the permanent magnets are magnetically connected to the electromagnet 2.

[0034] Optionally, the water injection and exhaust assembly includes:

[0035] A top cover is axially connected to the top of the extension tube, and the top cover is provided with a through hole for the threaded column to pass through. An exhaust valve is provided on one side of the top cover, one end of the exhaust valve is connected to the atmosphere, and the other end of the exhaust valve is connected to the interior of the extension tube. A water injection valve is provided on the other side of the top cover, the water inlet end of the water injection valve is connected to the water outlet end of the ground test system, and the water outlet end of the water injection valve is connected to the interior of the extension tube.

[0036] Optionally, the extension tube is threadedly connected to the sensor mounting tube, the sensor mounting tube is threadedly connected to the sensor assembly, the sensor assembly is threadedly connected to the pipe body, the test section connecting tube is threadedly connected to the pipe body, and the mounting plate is threadedly connected to the pipe body.

[0037] Compared with the prior art, the present invention has the following advantages and technical effects:

[0038] During use, the extension pipe is connected to the lifting equipment, and the downhole device is lowered into the borehole. After being lowered to the specified height, the driving part drives the clamping head to deform and clamp it in the borehole, so that the downhole device is initially fixed. Then, the deformation of the deformation part of the embolization tube is controlled by the ground test system to clamp the downhole device to the borehole. When the deformation part is deformed, it slides on the outside of the tube body without affecting the position of the test section connecting pipe. At the same time, the borehole is sealed, which facilitates the fixation of the downhole device and the formation of the test section. This device can accurately fix the downhole device at the specified position of the borehole through the cooperation of the embolization tube and the clamping head, thereby improving the test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work.

[0040] Figure 1 It is a schematic diagram of the structure of the present invention;

[0041] Figure 2 For the present invention Figure 1 A partial enlarged view of the middle part;

[0042] Figure 3 For the present invention Figure 1 A partial enlarged view of point B in the middle;

[0043] Figure 4 For the present invention Figure 1 A partial enlarged view of point C in the middle;

[0044] Figure 5 This is a top view of the downhole valve structure of the present invention;

[0045] Figure 6 This is a cross-sectional view of the connecting pipe structure of the test section of the present invention;

[0046] Figure 7 This is an axonometric view of the embolization tube of the present invention;

[0047] Among them, 1. extension tube; 2. sensor mounting tube; 3. sensor assembly; 4. embolization tube; 5. test section connecting tube; 6. fixing head; 7. downhole valve; 8. top cover; 9. exhaust valve; 10. water injection valve; 401. pipe body one; 402. slide groove; 403. electromagnet one; 404. slip ring; 405. rubber balloon; 501. pipe body two; 502. exhaust hole; 503. water injection hole; 601. rubber head; 602. threaded plate; 603. mounting plate; 604. threaded column; 701. valve plate; 702. baffle; 703. stator; 704. rotor; 705. water permeable hole; 706. electromagnet two; 707. permanent magnet; 708. threaded column through hole. DETAILED DESCRIPTION

[0048] Borehole hydrogeological testing is an important technical means to obtain the permeability parameters of rock and soil layers and the dynamic characteristics of groundwater. Its core purpose is to calculate key indicators such as permeability coefficient and hydraulic conductivity by injecting water, pumping water or pressurizing water into the borehole, combined with monitoring parameters such as head pressure, flow rate and time, to provide a scientific basis for groundwater resource evaluation and engineering geological stability analysis. This type of test includes various types such as pumping test, injection test, water pressure test, micro-water test and pulse test, which are suitable for rock and soil layers with different permeability. For example, pumping test calculates aquifer parameters by the relationship between depth drawdown and flow rate, injection test determines the permeability of low permeability formations by fixed head or reduced head method, and pulse test is used for extremely low permeability rock mass to infer permeability parameters by using the head pressure recovery rate.

[0049] Double-plug borehole hydrogeological testing equipment is a core tool in this field. Its traditional structure consists of two main components: downhole and surface. The downhole system consists of two expandable water-stop plugs (packers) connected by a pipe to form an isolated test section. These components are equipped with pressure sensors, temperature sensors, and flow control valves. The surface system includes a data logger, flowmeter, injection / extraction pump, and control unit, enabling real-time monitoring via cables or wireless transmission. The equipment controls the length of the test section by adjusting the plug spacing. Nitrogen or hydraulic pressure is used to expand the plugs, sealing the upper and lower sections of the borehole and ensuring isolation from other aquifers. For example, the heavy-duty double-plug system from Solexperts of Switzerland can accommodate boreholes with diameters ranging from 96 to 280 mm and operate at depths of up to 2,000 meters. It integrates high-precision sensors to simultaneously record changes in hydraulic head pressure within the test section, as well as in the upper and lower sections of the borehole.

[0050] The testing principle of traditional double-plug equipment is based on Darcy's law and unsteady flow theory. For example, in a water pressure test, a constant head pressure is applied to an isolated test section, and the amount of water seeping in is measured over time. The permeability coefficient is calculated using the formula K=Q / (2πLH) (K is the permeability coefficient, Q is the steady flow rate, L is the test section length, and H is the head height). In a micro-water test, the water level in the test section is transiently altered and its recovery is recorded, with parameters derived from the slope of the water level-time curve. The core advantage of this equipment lies in its ability to perform stratified testing. For example, in low-permeability fractured rock, the double plug can precisely isolate the target aquifer, avoiding hydraulic interference between different layers. Simultaneously, a matching sampling device collects undisturbed groundwater samples, providing reliable data for water quality analysis. This technology not only improves the accuracy of parameter acquisition but also significantly reduces the difficulty and cost of well cleaning compared to traditional full-bore testing, making it a standard method for studying complex hydrogeological conditions.

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0052] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0053] Reference Figures 1 to 7 The present invention discloses a multifunctional constant pressure penetration test system and device, including a downhole device and a surface test system. The downhole device includes:

[0054] Extension pipe 1, the top of the extension pipe 1 is provided with a water injection and exhaust assembly;

[0055] The sensor installation tube 2 is connected to the bottom of the extension tube 1 and is axially connected to the extension tube 1. The sensor installation tube 2 is provided with a sensor assembly 3 electrically connected to the ground test system.

[0056] Two embolic tubes 4 are connected by a test section connecting tube 5. The top embolic tube 4 is connected to the bottom of the sensor mounting tube 2 and is axially connected. The bottom embolic tube 4 is fixed with a clamping head 6. The test section connecting tube 5 is axially connected to the embolic tube 4. The embolic tube 4 includes a tube body 401 and a deformation portion sleeved on the outside of the tube body 401. The outside of the tube body 401 is provided with a slide groove 402. The deformation portion is slidably arranged on the outside of the tube body 401 through the slide groove 402.

[0057] The clamping head 6 is connected to a driving part, and the driving part drives the clamping head 6 to deform and clamp at the bottom of the drill hole;

[0058] The downhole valve 7 is fixedly connected in the test section connecting pipe 5. The downhole valve 7 is used to control the connection and disconnection between the test section connecting pipe 5 and the embolization pipe 4 located at the top.

[0059] During use, the extension tube 1 is connected to the lifting equipment, and the downhole device is lowered into the borehole. After being lowered to the specified height, the driving part drives the clamping head 6 to deform and clamp it in the borehole, so that the downhole device is initially fixed. Then, the deformation of the deformation part of the embolization tube 4 is controlled by the ground test system to clamp the downhole device to the borehole. When the deformation part is deformed, it slides on the outside of the tube body 401 without affecting the position of the test section connecting tube 5. At the same time, the borehole is sealed, which facilitates the fixation of the downhole device and the formation of the test section. The device can accurately fix the downhole device at the specified position of the borehole through the cooperation of the embolization tube 4 and the clamping head 6, thereby improving the test accuracy.

[0060] The ground test system includes a data acquisition system, a flow meter, a pressure flow control board, a booster pump, and a water reservoir. The data acquisition system is electrically connected to the flow meter, and the data acquisition system is electrically connected to the sensor assembly 3.

[0061] The sensor assembly 3 includes a pressure sensor and a temperature sensor.

[0062] The types of ground test systems and sensors belong to the existing technology and are not described here in detail.

[0063] As an optional embodiment, the deformation portion includes:

[0064] Two slip rings 404 are slidably arranged on the outside of the slide groove 402. An elastic portion is provided between the two slip rings 404 and is sleeved on the outside of the slide groove 402.

[0065] The rubber balloon 405 has two ends fixed to the corresponding slip rings 404;

[0066] Electromagnet 1 403 is embedded in tube body 1 401 and is located in the middle of chute 402 . Electromagnet 1 403 is magnetically connected to slip ring 404 .

[0067] The tube body 401 is made of insulating material. When the electromagnet 403 is energized to generate a magnetic field, the two slip rings 404 are attracted to the middle of the electromagnet 403 under the action of the magnetic field, causing the elastic part to compress. When the electromagnet 403 is de-energized, the magnetic field disappears, and the elastic part drives the two slip rings 404 to reset.

[0068] As an optional implementation, the elastic portion includes a spring, and the spring is sleeved on the outside of the sliding groove 402 .

[0069] When electromagnet 403 is energized, it generates a magnetic field. As the magnetic force generated by electromagnet 403 moves toward the center, it attracts the slip rings 404 located on both sides of electromagnet 403 to move toward the center and squeeze the spring, while driving the rubber balloon 405 to expand outward, causing the outer wall of the rubber balloon 405 to be pressed against the side wall of the drill hole, forming a blockage. When electromagnet 403 is de-energized, the magnetic force disappears, the spring returns to its initial length, and pushes the two slip rings 404 away from each other until they are reset.

[0070] As an optional embodiment, the test section connecting pipe 5 includes:

[0071] The second tube body 501 has two ends fixed to the corresponding ends of the embolization tube 4;

[0072] The exhaust hole 502 is provided at the top of the second tube body 501;

[0073] The water injection hole 503 is provided at the bottom of the second tube body 501 .

[0074] As an optional embodiment, the fixing head 6 includes:

[0075] The rubber head 601 is fixed to the bottom of the embolization tube 4 at the bottom through the mounting plate 603, and the rubber head 601 is transmission-connected to the driving part.

[0076] As an optional embodiment, the driving unit includes:

[0077] Threaded plate 602, axially connected to the bottom of mounting plate 603;

[0078] The threaded column 604 is threadedly connected to the middle part of the threaded plate 602. The bottom end of the threaded column 604 is rotatably connected to the inner wall of the rubber head 601. The top end of the threaded column 604 extends upward after passing through the mounting plate 603, and passes through the inner cavity formed by the extension tube 1, the sensor mounting tube 2, the embolization tube 4, and the test section connecting tube 5, and then passes through the middle of the water injection and exhaust assembly.

[0079] During use, the threaded column 604 is rotated so that the threaded column 604 rises and falls on the threaded plate 602 under the action of the thread, driving the rubber head 601 to deform. After the inner wall of the rubber head 601 approaches the threaded plate 602, the side wall of the rubber head 601 is squeezed into contact with the inner wall of the drill hole and squeezed to fix the downhole device.

[0080] As an optional embodiment, the downhole valve 7 includes:

[0081] The valve plate 701 is axially connected to the second pipe body 501. The valve plate 701 has two symmetrically arranged water-permeable holes 705. The middle of the valve plate 701 is provided with a threaded post hole 708 for the threaded post 604 to pass through.

[0082] The rotor 704 is rotatably mounted on the valve plate 701. The rotor 704 and the valve plate 701 are coaxially arranged. The two ends of the rotor 704 are symmetrically fixed with blocking pieces 702 for blocking the water-permeable holes 705.

[0083] The rotation driving part is in transmission connection with the rotor 704 and is disposed on the valve plate 701 .

[0084] As an optional embodiment, the rotation drive unit includes:

[0085] The stator 703 is coaxially arranged on the valve plate 701 and is sleeved on the outside of the threaded column through hole 708. The stator 703 has a plurality of electromagnets 706 embedded therein and arranged at equal intervals around the circumference.

[0086] Two permanent magnets 707 are symmetrically embedded in the rotor 704 , and the permanent magnets 707 are magnetically connected to the second electromagnet 706 .

[0087] When it is necessary to control the water supply to the test section connecting pipe 5, power is supplied to each electromagnet 2 706 so that the polarities of the two adjacent electromagnets 2 706 are opposite. At this time, the magnetic connection between the electromagnet 2 706 and the permanent magnet 707 can drive the rotor 704 to rotate relative to the stator 703, so that the baffle 702 blocks or moves away from the water permeable hole 705, thereby realizing the on and off of the test section connecting pipe 5.

[0088] After the baffle 702 rotates to a designated position, the position of the baffle 702 can be fixed by magnetic attraction by adjusting the polarity of the electromagnet 2 706 corresponding to the permanent magnet 707 .

[0089] As an optional embodiment, the water injection and exhaust assembly includes:

[0090] The top cover 8 is axially connected to the top of the extension tube 1. The top cover 8 is provided with a through hole for the threaded column 604 to pass through. An exhaust valve 9 is provided on one side of the top cover 8. One end of the exhaust valve 9 is connected to the atmosphere, and the other end of the exhaust valve 9 is connected to the interior of the extension tube 1. A water injection valve 10 is provided on the other side of the top cover 8. The water inlet end of the water injection valve 10 is connected to the water outlet end of the ground test system, and the water outlet end of the water injection valve 10 is connected to the interior of the extension tube 1.

[0091] As an optional embodiment, the extension tube 1 is threadedly connected to the sensor mounting tube 2, the sensor mounting tube 2 is threadedly connected to the sensor assembly 3, the sensor assembly 3 is threadedly connected to the pipe body 401, the test section connecting tube 5 is threadedly connected to the pipe body 401, and the mounting plate 603 is threadedly connected to the pipe body 401.

[0092] The threaded connection between the pipes facilitates both disassembly and assembly of the downhole unit and adapts to pipes of varying lengths for drilling at varying depths. Furthermore, the detachable connection allows switching between dual- and single-bolt modes, enabling a single downhole unit to function in multiple ways.

[0093] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0094] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A multifunctional constant pressure penetration test system and device, including a downhole device and a surface test system, characterized in that: The downhole device comprises: An extension pipe (1), wherein a water injection and exhaust assembly is provided at the top of the extension pipe (1); A sensor mounting tube (2) is arranged in communication with the bottom of the extension tube (1), the sensor mounting tube (2) is axially connected to the extension tube (1), and a sensor assembly (3) electrically connected to the ground test system is provided in the sensor mounting tube (2); Two embolic tubes (4), a test section connecting tube (5) is provided between the two embolic tubes (4), the embolic tube (4) at the top is connected to the bottom of the sensor mounting tube (2) and is axially connected, the embolic tube (4) at the bottom is fixed with a clamping head (6), and the test section connecting tube (5) is axially connected to the embolic tube (4); the embolic tube (4) includes a tube body (401) and a deformation part sleeved on the outside of the tube body (401), a sliding groove (402) is provided on the outside of the tube body (401), and the deformation part is slidably provided on the outside of the tube body (401) through the sliding groove (402); The clamping head (6) is in transmission connection with a driving part, and the driving part drives the clamping head (6) to deform and clamp at the bottom of the drill hole; A downhole valve (7) is fixedly connected in the test section connecting pipe (5), and the downhole valve (7) is used to control the connection and disconnection between the test section connecting pipe (5) and the embolization pipe (4) located at the top; The deformation portion includes: Two slip rings (404) are slidably arranged on the outside of the slide groove (402); an elastic portion is provided between the two slip rings (404), and the elastic portion is sleeved on the outside of the slide groove (402); A rubber balloon (405), both ends of which are fixed to the corresponding slip rings (404); Electromagnet 1 (403) is embedded in the tube body 1 (401), the electromagnet 1 (403) is located in the middle of the slide groove (402), and the electromagnet 1 (403) is magnetically connected to the slip ring (404); The tube body (401) is made of insulating material. When the electromagnet (403) is energized to generate a magnetic field, the two slip rings (404) are attracted to the middle of the electromagnet (403) under the action of the magnetic field, causing the elastic part to be compressed. When the electromagnet (403) is powered off, the magnetic field disappears, and the elastic part drives the two slip rings (404) to reset. The test section connecting pipe (5) comprises: The second tube body (501) has two ends respectively fixed to the corresponding ends of the embolization tube (4); An exhaust hole (502) is provided on the top of the second tube body (501); A water injection hole (503) is provided at the bottom of the second tube body (501); The fixing head (6) comprises: A rubber head (601) is fixed to the bottom of the embolization tube (4) located at the bottom via a mounting plate (603), and the rubber head (601) is in transmission connection with the driving part; The driving unit includes: A threaded plate (602) axially connected to the bottom of the mounting plate (603); A threaded column (604) is threadedly connected to the middle of the threaded plate (602), the bottom end of the threaded column (604) is rotatably connected to the inner wall of the rubber head (601), and the top end of the threaded column (604) extends upward after passing through the mounting plate (603), passes through the inner cavity formed by the connection of the extension tube (1), the sensor mounting tube (2), the embolization tube (4), and the test section connecting tube (5), and then passes out from the middle of the water injection and exhaust assembly; The downhole valve (7) comprises: A valve plate (701) is axially connected to the second tube body (501), and two symmetrically arranged water-permeable holes (705) are provided on the valve plate (701). A threaded column through hole (708) for the threaded column (604) to pass through is provided in the middle of the valve plate (701); A rotor (704) is rotatably disposed on the valve plate (701), the rotor (704) and the valve plate (701) being coaxially disposed, and blocking pieces (702) for blocking the water-permeable holes (705) being symmetrically fixed to both ends of the rotor (704); a rotation drive unit, in transmission connection with the rotor (704), the rotation drive unit being arranged on the valve plate (701); The rotation drive unit includes: A stator (703) is coaxially arranged on the valve plate (701), and the stator (703) is sleeved on the outside of the threaded column through hole (708), and a plurality of electromagnets (706) arranged at equal intervals in the circumferential direction are embedded in the stator (703); Two permanent magnets (707) are symmetrically embedded in the rotor (704), and the permanent magnets (707) are magnetically connected to the second electromagnet (706); The water injection and exhaust assembly comprises: A top cover (8) is axially connected to the top of the extension tube (1), and the top cover (8) is provided with a through hole for the threaded column (604) to pass through. An exhaust valve (9) is provided on one side of the top cover (8), one end of the exhaust valve (9) is connected to the atmosphere, and the other end of the exhaust valve (9) is connected to the interior of the extension tube (1). A water injection valve (10) is provided on the other side of the top cover (8), the water inlet end of the water injection valve (10) is connected to the water outlet end of the ground test system, and the water outlet end of the water injection valve (10) is connected to the interior of the extension tube (1).

2. A multifunctional constant pressure penetration testing system and device according to claim 1, characterized in that: The elastic portion comprises a spring, and the spring is sleeved on the outside of the sliding groove (402).

3. A multifunctional constant pressure penetration testing system and device according to claim 1, characterized in that: The extension tube (1) is threadedly connected to the sensor mounting tube (2), the sensor mounting tube (2) is threadedly connected to the sensor assembly (3), the sensor assembly (3) is threadedly connected to the pipe body (401), the test section connecting tube (5) is threadedly connected to the pipe body (401), and the mounting plate (603) is threadedly connected to the pipe body (401).

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