Drilling device based on deep engineering true triaxial while-drilling simulation test

Abstract

The invention belongs to the technical field of rock mechanics test equipment, and discloses a drilling device based on a deep engineering true triaxial while-drilling simulation test, the drilling device comprises while-drilling trolley equipment, the while-drilling trolley equipment is composed of a mobile vehicle body, a driving mechanism and a drilling mechanism, the drilling mechanism comprises a drill rod main body and a drill bit main body, according to the invention, through the cooperation of structures such as a scraping assembly and a flushing assembly, rock debris accumulated at the joint of the drill bit main body and the drill rod main body can be conveniently cleaned, and large-particle rock debris is scraped and cleaned through the scraping assembly, is loosened and is pushed to the periphery, so that the rock debris can be carried and discharged by circulating drilling fluid; meanwhile, the flushing assembly pressurizes the drilling fluid without rock debris, so that the drilling fluid washes the scraping plate and the drill bit body, attached small-particle rock debris is cleaned, the situation that the scraping plate is clamped by the small-particle rock debris is avoided, the situation of rock debris accumulation is avoided, and the accuracy of data during testing is guaranteed.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of rock mechanics test equipment, and particularly relates to a drilling device based on true triaxial while-drilling simulation test of deep engineering. BACKGROUND

[0002] With the continuous development of underground engineering construction to the deep, the deep rock engineering is affected by high ground stress, high ground temperature, high permeation pressure and strong mining disturbance. In the deep engineering, the rock is under the action of three unequal principal stresses, and the size and direction of the three principal stresses jointly determine the mechanical behavior and failure mode of the rock. The triaxial while-drilling simulation test can accurately study the rock breaking mechanism transition law under different stress states, especially the critical condition of the transition from brittle failure to ductile failure. In addition, the influence of the relative relationship between the principal stress direction and the drilling direction on the drilling stability can be evaluated again, which is particularly important in directional drilling and horizontal drilling. Finally, reliable basis can be provided for the analysis of deep while-drilling parameters, and the application and development of the while-drilling measurement technology in deep engineering can be improved.

[0003] The triaxial while-drilling simulation test device includes a true triaxial loading device, a while-drilling trolley device and a comprehensive monitoring system. During the experiment, the physical model sample is first placed in the true triaxial loading device, then the while-drilling trolley device is moved to the true triaxial loading device for connection, the drilling fluid circulation pipeline is connected, the monitoring modules of the comprehensive monitoring system are started, and the drill rod is started for drilling. The drilling parameters, stress and strain and acoustic emission signals are synchronously collected, the rock response characteristics in the drilling process are monitored in real time, and the experiment is completed.

[0004] At present, there are deficiencies in the while-drilling system research in the laboratory. When performing the triaxial while-drilling simulation test, the drill cuttings generated during drilling need to be guided out, the annular flow in the true triaxial cabin is limited, the drill cuttings generated during drilling are easy to accumulate at the root of the drill bit, the accumulation of the drill cuttings can cause the abnormal increase of the contact pressure around the drill bit, the transverse vibration of the drill rod, the accelerated wear, and the drill cuttings layer can also form a heat insulation effect, resulting in the difference between the actual temperature of the drill bit and the sensor reading, thereby affecting the accuracy of the test. Therefore, it is an important problem for persons skilled in the art to solve the problem of drill cuttings accumulation. Therefore, a drilling device based on true triaxial while-drilling simulation test of deep engineering is proposed. SUMMARY

[0005] To solve the problem of drill cuttings accumulation proposed in the background, the application provides a drilling device based on true triaxial while-drilling simulation test of deep engineering.

[0006] To achieve the above object, the present application provides the following technical scheme: a drilling device based on deep engineering true triaxial while-drilling simulation test, comprising a while-drilling car device composed of a mobile car body, a driving mechanism and a drilling mechanism, the drilling mechanism comprising a drill rod main body and a drill bit main body, further comprising: a scraping assembly installed at the connection between the drill rod main body and the drill bit main body for cleaning the bottom of the drill bit main body; a flushing assembly installed inside the drill rod main body for flushing the bottom of the drill bit main body; an electric telescopic rod fixedly installed inside the drill rod main body for driving the scraping assembly and the flushing assembly; wherein the scraping assembly comprises a rotating ring I rotatably connected with the drill rod main body and a supporting ring slidably connected inside the drill rod main body, and the outer side of the rotating ring I is fixedly connected with a scraper in a ring shape.

[0007] the flushing assembly comprises a pressurizing cavity opened in the drill rod main body, and the pressurizing cavity is rotatably connected with a rotating ring II inside.

[0008] Preferably, a sliding groove I is opened in the rotating ring I, the supporting ring is fixedly connected with a sliding plate in a ring shape on one side, and the outer side of the sliding plate is fixedly connected with a limiting protrusion I in the middle.

[0009] Preferably, the rotating ring I is rotatably connected at the connection between the drill rod main body and the drill bit main body, one end of the scraper abuts against one end of the drill bit main body, the sliding plate is slidably connected with the drill rod main body, and the limiting protrusion I is slidably connected inside the sliding groove I.

[0010] Preferably, a blocking block is fixedly connected in a ring shape inside the pressurizing cavity, a flushing channel is opened in a ring shape on the outer side of the pressurizing cavity close to the drill bit main body, and the flushing channel and the blocking block are distributed in a staggered manner.

[0011] Preferably, a pushing ring is movably connected on the outer side of the rotating ring II, an extrusion block is fixedly connected in a ring shape on the outer side of the rotating ring II, a plurality of liquid supplementing holes are opened in the top of the rotating ring II, a sliding groove II is opened on both sides of the top of the rotating ring II, and a liquid supplementing groove is opened in the drill rod main body at one end of the rotating ring II away from the drill bit main body.

[0012] Preferably, the extrusion block abuts against the blocking block, the position of the liquid supplementing groove corresponds to the flushing channel, the liquid supplementing holes are in communication with the liquid supplementing groove, and the pushing ring is slidably connected inside the drill rod main body.

[0013] Preferably, a fixing frame is fixedly connected inside the flushing channel, a sliding sealing block is slidably connected on the outer side of the fixing frame, and a spring is fixedly arranged in the middle of the fixing frame and the sliding sealing block.

[0014] Preferably, the pushing ring is fixedly connected with a pair of limiting protrusions two, the limiting protrusions two are slidingly connected in the sliding groove two, and the pushing ring is fixedly connected with the electric telescopic rod.

[0015] Preferably, when the electric telescopic rod is elongated, the pushing ring is driven to move, at this time, the supporting ring drives the limiting protrusion one to slide in the sliding groove one through the sliding plate, so that the rotating ring one is extruded by the limiting protrusion one to rotate.

[0016] Preferably, the driving mechanism is provided with a fixed structure in the middle, the fixed structure is connected with one end of the drilling mechanism, the drilling mechanism is provided with a flange connecting structure at the connecting position with the moving vehicle body, the moving vehicle body is internally provided with a control box, and the control box controls the fixed structure through a line.

[0017] Compared with the prior art, the present application has the following beneficial effects: The present application is provided with a scraping assembly and a flushing assembly, which can clean the accumulated cuttings at the connection between the drill bit body and the drill rod body. The large-particle cuttings are scraped and loosened by the scraping assembly, and are pushed to the surrounding area, so that they can be carried out of the drilling fluid. The flushing assembly pressurizes the cuttings-free drilling fluid, so that the scraping plate and the drill bit body are flushed, the small-particle cuttings are cleaned, and the scraping plate is prevented from being stuck by the small-particle cuttings. In this way, the accumulation of cuttings is avoided, and the accuracy of the test data is ensured. The present application is provided with a sliding groove one and a limiting protrusion one, which can drive the rotating ring one to rotate. The supporting ring drives the limiting protrusion one to move in the sliding groove one through the sliding plate, so that the rotating ring one is extruded to rotate the scraping plate, the large-particle cuttings accumulated on the drill bit body are scraped and loosened, and the cuttings are pushed out of the drilling fluid blocking position of the drill bit body, so that the operation of the drill bit body is not affected by the accumulation of cuttings. The present application is provided with a pressurizing cavity and a flushing channel, which can flush the scraping plate and the drill bit body. The drilling fluid is pressurized by the pressurizing cavity and the rotating ring two, and is sprayed from the flushing channel, so that the small-particle cuttings attached to the drill bit body and the scraping plate are flushed, the small-particle cuttings are prevented from being accumulated, the scraping plate is prevented from being stuck, the scraping of the large-particle cuttings is not affected, and the gap between the large-particle cuttings is prevented from being filled by the small-particle cuttings. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole schematic view of the drilling structure of the present application. Figure 2 It is an enlarged view of the section of the scraping assembly of the present application. Figure 3 It is a detail view of the parts of the scraping assembly of the present application. It is a detail view of the parts of the scraping assembly of the present application.Figure 4 is a partial sectional view of the drill rod body of the present application; Figure 5 is a partial sectional view of the middle part of the drill rod body of the present application; Figure 6 is a detail view of the flushing assembly part of the present application; Figure 7 is a partial sectional view of the flushing channel of the present application; Figure 8 is a sectional view of the connection between the fixing frame and the sliding sealing block of the present application; Figure 9 is a side view of the drilling rig of the present application; Figure 10 is a flow chart of the experiment of the present application.

[0019] In the figure: 100, mobile vehicle body; 200, driving mechanism; 300, drilling mechanism; 310, drill rod body; 320, drill bit body; 330, scraping assembly; 331, rotating ring one; 332, supporting ring; 333, scraper; 334, sliding groove one; 335, sliding plate; 336, limiting protrusion one; 340, flushing assembly; 341, pressurizing cavity; 342, blocking block; 343, flushing channel; 344, rotating ring two; 345, extrusion block; 346, liquid supplementing hole; 347, sliding groove two; 348, pushing ring; 349, limiting protrusion two; 3410, liquid supplementing groove; 3411, fixing frame; 3412, sliding sealing block; 350, electric telescopic rod; 400, fixing structure; 500, control box; 600, flange connecting structure. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0021] As shown in the figure, the present application provides a drilling device based on deep engineering true triaxial drilling simulation test, which comprises a drilling rig, and the drilling rig is composed of a mobile vehicle body 100, a driving mechanism 200 and a drilling mechanism 300. The drilling mechanism 300 comprises a drill rod body 310 and a drill bit body 320, and further comprises: Figures 1 to 10 a scraping assembly 330, which is installed at the connection between the drill rod body 310 and the drill bit body 320, and is used for cleaning the bottom of the drill bit body 320; ​​​A flushing assembly 340 is mounted inside the drill rod body 310 for flushing the bottom of the drill bit body 320; An electric telescopic rod 350 is fixedly mounted inside the drill rod body 310 for driving the scraping assembly 330 and the flushing assembly 340. The scraping assembly 330 comprises a rotating ring I 331 rotatably connected with the drill rod body 310 and a supporting ring 332 slidably connected inside the drill rod body 310, and the outer side of the rotating ring I 331 is fixedly connected with a scraper 333 in an annular distribution.

[0022] The flushing assembly 340 comprises a pressurized cavity 341 opened inside the drill rod body 310, and a rotating ring II 344 is rotatably connected inside the pressurized cavity 341.

[0023] By the above scheme, the electric telescopic rod 350 drives the scraping assembly 330 and the flushing assembly 340 to run simultaneously, the scraper 333 scrapes the large-particle rock debris at the drill bit body 320, so that the rock debris can be carried out by the circulating drilling fluid, and the flushing assembly 340 pressurizes the rock debris-free drilling fluid to flush the scraper 333 and the drill bit body 320 to clean the small-particle rock debris adhered, thereby avoiding the accumulation of the small-particle rock debris to block the scraping assembly 330.

[0024] As shown in Figures 2 to 4 , a sliding groove I 334 is opened inside the rotating ring I 331, a sliding plate 335 is fixedly connected in an annular distribution on one side of the supporting ring 332, and a limiting protrusion I 336 is fixedly connected to the outer side of the middle of the sliding plate 335. The rotating ring I 331 is rotatably connected at the connection between the drill rod body 310 and the drill bit body 320, one end of the scraper 333 abuts against one end of the drill bit body 320, the sliding plate 335 is slidably connected with the drill rod body 310, and the limiting protrusion I 336 is slidably connected inside the sliding groove I 334.

[0025] By the above scheme, the scraping assembly 330 is provided, the supporting ring 332 drives the sliding plate 335 to move synchronously, the limiting protrusion I 336 moves inside the sliding groove I 334 and presses the rotating ring I 331 to rotate, the one-way rotation of the rotating ring I 331 drives the scraper 333 to scrape the rock debris accumulated at the drill bit body 320, the rock debris adhered at the connection between the drill bit body 320 and the drill rod body 310 is pushed to the periphery by the scraping of the scraper 333, the rock debris blocked by the drill bit body 320 can be carried out by the circulating drilling fluid, and the accumulation of the large-particle rock debris is avoided.

[0026] As shown in Figure 4 , Figure 5 and Figure 6As shown, the blocking block 342 is fixedly connected in the annular distribution inside the pressurizing cavity 341, and the flush channel 343 is annularly distributed on the outer side of the pressurizing cavity 341 close to the drill bit body 320. The push ring 348 is movably connected outside the rotating ring two 344, the extrusion block 345 is fixedly connected in the annular distribution outside the rotating ring two 344, the rotating ring two 344 is provided with a plurality of liquid supplementing holes 346 on the top, and the rotating ring two 344 is provided with a sliding groove two 347 on both sides of the top, and the rotating ring two 344 is provided with a liquid supplementing groove 3410 arranged in the drill pipe body 310 away from the drill bit body 320.

[0027] The above scheme is adopted: the setting of the flushing assembly 340 can spray the drilling fluid by pressurization to flush the small particle cuttings attached to the drill bit body 320 and the scraper 333, the pressurizing cavity 341 and the rotating ring two 344 are set to divide the pressurizing cavity 341 into a plurality of independent chambers by the blocking block 342 inside the pressurizing cavity 341 and the extrusion block 345 outside the rotating ring two 344, so as to pressurize the drilling fluid, the liquid supplementing hole 346 and the liquid supplementing groove 3410 are set to facilitate the supplement of the drilling fluid into the chamber, so as to suck the drilling fluid without carrying cuttings from the inside of the drill pipe body 310 to flush the drill bit body 320, and avoid the cuttings from entering the pressurizing cavity 341 to affect the operation of the flushing assembly 340.

[0028] As shown in the figure, Figures 5 to 8 The extrusion block 345 abuts against the blocking block 342, the position of the liquid supplementing groove 3410 corresponds to the flush channel 343, the liquid supplementing hole 346 is in communication with the liquid supplementing groove 3410, and the push ring 348 is slidingly connected in the inside of the drill pipe body 310. The fixed frame 3411 is fixedly connected inside the flush channel 343, the sliding sealing block 3412 is slidingly connected outside the fixed frame 3411, and the spring is fixedly arranged in the middle of the fixed frame 3411 and the sliding sealing block 3412. The pair of limiting protrusions two 349 are fixedly connected inside the push ring 348, the limiting protrusions two 349 are slidingly connected inside the sliding groove two 347, and the push ring 348 is fixedly connected with the electric telescopic rod 350.

[0029] Adopting the above scheme: by setting the push ring 348, the limit block two 349 inside the push ring 348 can slide inside the sliding groove two 347 to extrude the rotating ring two 344 to reciprocate, thereby pushing the rotating ring two 344 to rotate to pressurize the drilling fluid, and the drilling fluid can be directly supplemented in time after one flushing, and the flushing channel 343 is arranged to guide the pressurized drilling fluid, and the fixed frame 3411 and the sliding sealing block 3412 arranged inside the flushing channel 343 are combined, so that the drilling fluid inside the flushing channel 343 can only be sprayed out in one direction, thereby avoiding that after the flushing channel 343 sprays out the drilling fluid, the negative pressure formed by the rotating ring two 344 rotating back after the flushing channel 343 sprays out the drilling fluid absorbs the drilling fluid carrying the cuttings outside the drill rod main body 310 into the flushing channel 343, causing the sliding sealing block 3412 to be stuck, and affecting the flushing of the drill bit main body 320 and the scraper 333.

[0030] As shown in Figures 2 to 9 , the electric telescopic rod 350 is extended, driving the push ring 348 to move, at this time the support ring 332 pushes the limit block one 336 to slide inside the sliding groove one 334 through the sliding plate 335, so that the rotating ring one 331 is extruded by the limit block one 336 to rotate.

[0031] Adopting the above scheme: when the electric telescopic rod 350 is extended, the push ring 348 is moved towards the drill bit main body 320 by a pair of electric telescopic rods 350, so that the push ring 348 extrudes the rotating ring two 344 through the limit block two 349 to rotate, pressurizes the drilling fluid to spray out, and flushes the drill bit main body 320 and the scraper 333, at the same time the support ring 332 pushes the limit block one 336 to slide inside the sliding groove one 334 through the sliding plate 335, so that the rotating ring one 331 is extruded by the limit block one 336 to rotate, so that the rotating ring one 331 drives the scraper 333 to rotate, and the accumulated cuttings at the drill bit main body 320 are scraped.

[0032] As shown in Figure 9 , the drive mechanism 200 is provided with a fixed structure 400 in the middle, the fixed structure 400 is connected with one end of the drilling mechanism 300, the drilling mechanism 300 is provided with a flange connection structure 600 at the connection with the mobile vehicle body 100, the mobile vehicle body 100 is provided with a control box 500 inside, and the control box 500 controls the fixed structure 400 through a line.

[0033] Adopt the above scheme: through the driving mechanism 200 for pushing the drilling mechanism 300 to the inside of the physical model sample, the moving car body 100 is used to drive the drilling mechanism 300 to move and connect with the true triaxial loading device, the fixing structure 400 is used to fix the drilling mechanism 300, and the drilling mechanism 300 is driven to rotate, the flange connection structure 600 is used to fix the moving car body 100 and the true triaxial loading device, keep the stability of the drilling mechanism 300 when drilling, and the control box 500 controls the rotating speed of the drilling mechanism 300 through the fixing structure 400.

[0034] The working principle and use process of the present application are as follows: When drilling, first, the drilling rig is connected with the true triaxial loading device through the flange connection structure 600, the driving mechanism 200 is used to drive the drill pipe body 310 to rotate, the drill bit body 320 is used to drill into the physical model sample, and after the drill bit body 320 drills into the physical model sample, the drilling fluid conveyed by the drill pipe body 310 enters the pressurized cavity 341 through the liquid supplementing groove 3410 and the liquid supplementing hole 346, at this time, the electric telescopic rod 350 is started, the support ring 332 and the push ring 348 are pushed to move by the electric telescopic rod 350; The support ring 332 is pushed to move by the electric telescopic rod 350, at this time, the support ring 332 pushes the sliding plate 335 to slide in the drill pipe body 310 to the end of the drill bit body 320, at this time, the limiting protrusion one 336 slides in the sliding groove one 334, when the electric telescopic rod 350 is retracted, the limiting protrusion one 336 slides in the sliding groove one 334, and at the same time, the limiting protrusion one 336 extrudes the rotating ring one 331 to rotate, the rotating ring one 331 drives the scraper 333 to rotate, so that the connection between the drill pipe body 310 and the drill bit body 320 is scraped, and the large accumulated rock debris at the connection between the drill bit body 320 and the drill pipe body 310 is scraped, so that the rock debris can be taken out by the circulating drilling fluid; When the electric telescopic rod 350 pushes the pushing ring 348 to move, the pushing ring 348 slides in the sliding groove two 347 by the internal limiting protrusion two 349, and the limiting protrusion two 349 extrudes the rotating ring two 344 to rotate. When the rotating ring two 344 rotates, the liquid supplement hole 346 at the top of the rotating ring two 344 is misaligned with the liquid supplement groove 3410, the extrusion block 345 in the rotating ring two 344 cooperates with the blocking block 342 to pressurize the drilling fluid in the rotating ring two 344, the drilling fluid is extruded to move in the flushing channel 343, and when the pressure reaches a certain degree, the extruded sliding sealing block 3412 moves, the drilling fluid is sprayed from the inside of the flushing channel 343, the fine debris adhered to the scraper 333 is flushed, the scraped debris is flushed, the debris is diffused by the drilling fluid sprayed from the flushing channel 343, and the debris is carried out by the circulating drilling fluid, so that the debris is accumulated at the connection between the drill rod body 310 and the drill bit body 320, and the experimental results of the simulation test are affected.

[0035] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0036] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drilling device based on a true three-axis drilling simulation test for deep engineering, comprising a drilling trolley device, wherein the drilling trolley device comprises a mobile body (100), a driving mechanism (200) and a drilling mechanism (300), wherein the drilling mechanism (300) comprises a drill rod body (310) and a drill bit body (320), and is characterized in that: Also includes: a scraping assembly (330), which is installed at the connection between the drill rod body (310) and the drill bit body (320) and is used to clean the bottom of the drill bit body (320); A flushing assembly (340) is installed inside the drill rod body (310) and is used to flush the bottom of the drill bit body (320); An electric telescopic rod (350) fixedly mounted inside the drill rod body (310) and used to drive the scraping assembly (330) and the flushing assembly (340); The scraping assembly (330) comprises a rotating ring (331) rotatably connected to the drill rod body (310) and a support ring (332) slidably connected to the inside of the drill rod body (310); a scraper (333) is fixedly connected to the outer side of the rotating ring (331) in an annular shape; The flushing assembly (340) comprises a pressurizing chamber (341) opened inside the drill rod body (310), and a second rotating ring (344) is rotatably connected inside the pressurizing chamber (341).

2. The drilling device based on the deep engineering true triaxial drilling simulation test according to claim 1 is characterized in that: A sliding groove (334) is provided inside the rotating ring (331), a sliding plate (335) is fixedly connected to one side of the supporting ring (332) in an annular shape, and a limiting protrusion (336) is fixedly connected to the middle of the outer side of the sliding plate (335).

3. The drilling device based on the deep engineering true triaxial drilling simulation test according to claim 2 is characterized in that: The rotating ring (331) is rotatably connected to the connection between the drill rod body (310) and the drill bit body (320), one end of the scraper (333) contacts one end of the drill bit body (320), the sliding plate (335) is slidably connected to the drill rod body (310), and the limiting protrusion (336) is slidably connected to the inside of the sliding groove (334).

4. The drilling device based on true triaxial drilling simulation test for deep engineering according to claim 1 is characterized in that: A blocking block (342) is fixedly connected to the inside of the pressurizing chamber (341) in an annular distribution, and a flushing channel (343) is opened in an annular distribution near the outside of the drill bit body (320) of the pressurizing chamber (341). The flushing channel (343) and the blocking block (342) are staggered.

5. The drilling device based on true triaxial drilling simulation test for deep engineering according to claim 1 is characterized in that: The outer side of the rotating ring 2 (344) is movably connected to a push ring (348), and the outer side of the rotating ring 2 (344) is fixedly connected to an extrusion block (345) in an annular distribution. A plurality of fluid replenishing holes (346) are provided on the top of the rotating ring 2 (344), and two slide grooves (347) are provided on both sides of the top of the rotating ring 2 (344). The end of the rotating ring 2 (344) away from the drill bit body (320) is provided with a fluid replenishing groove (3410) opened inside the drill rod body (310).

6. The drilling device based on true triaxial drilling simulation test for deep engineering according to claim 5 is characterized in that: The squeezing block (345) is in conflict with the blocking block (342), the position of the fluid replenishing groove (3410) corresponds to the flushing channel (343), the fluid replenishing hole (346) is connected to the fluid replenishing groove (3410), and the pushing ring (348) is slidably connected to the inside of the drill rod body (310).

7. The drilling device based on true triaxial drilling simulation test for deep engineering according to claim 4 is characterized in that: The flushing channel (343) is fixedly connected to a fixing frame (3411) inside, the fixing frame (3411) is slidably connected to a sliding sealing block (3412) outside, and a spring is fixedly provided between the fixing frame (3411) and the sliding sealing block (3412).

8. The drilling device based on true triaxial drilling simulation test for deep engineering according to claim 5 is characterized in that: A pair of limiting protrusions (349) are fixedly connected inside the pushing ring (348), and the limiting protrusions (349) are slidably connected inside the sliding groove (347). The pushing ring (348) is fixedly connected to the electric telescopic rod (350).

9. The drilling device based on true triaxial drilling simulation test for deep engineering according to claim 1, characterized in that: When the electric telescopic rod (350) is extended, it drives the pushing ring (348) to move. At this time, the supporting ring (332) pushes the limiting protrusion (336) to slide inside the sliding groove (334) through the sliding plate (335), so that the rotating ring (331) is squeezed by the limiting protrusion (336) to rotate.

10. The drilling device based on true triaxial drilling simulation test for deep engineering according to claim 1, characterized in that: A fixed structure (400) is installed in the middle of the driving mechanism (200), and the fixed structure (400) is connected to one end of the drilling mechanism (300). A flange connection structure (600) is installed at the connection between the drilling mechanism (300) and the mobile body (100). A control box (500) is installed inside the mobile body (100), and the control box (500) controls the fixed structure (400) through a circuit.

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