A coal mine shaft lining penetration water pressure testing device

Abstract

The invention discloses a coal mine shaft lining permeability water pressure test device, belonging to the field of permeability water pressure test devices. It includes a cylinder for installing a piezometer, a front end cover of the cylinder is provided with an opening and closing water retaining assembly, a rear end cover of the cylinder is slidably provided with an adjustment assembly for driving the cylinder to slide forward and backward, a sliding support assembly is also provided between the adjustment assembly and the cylinder, and the sliding support assembly includes a sleeve fixedly sleeved on the middle part of the piezometer body, an expansion ring located at the outer edges of both sides of the sleeve and interconnected, a spiral air pipe sleeved on the piezometer and connected to the expansion ring, and an adjustment air bag assembly for providing air pressure to the spiral air pipe, the spiral air pipe is extended under the drive of air pressure to push the piezometer to slide, and the expansion ring is expanded to achieve stable support for the positioned piezometer. The device of the invention can not only install and stably support the piezometer, but also adjust the position of the piezometer in the borehole to a suitable measuring position.

Description

Technical Field

[0001] The invention belongs to the field of penetration water pressure testing devices, and in particular relates to a penetration water pressure testing device for coal mine shaft lining. Background Art

[0002] A shaft refers to a type of vertical or inclined project excavated from the ground to the ore body during underground mining or underground engineering construction. A vertical project is called a vertical shaft, and an inclined project is called an inclined shaft. The shaft is the main entrance and exit of the mine to the ground. It is the throat project for lifting and transporting coal (or gangue), transporting personnel, materials and equipment, and ventilation and drainage during mine production. A coal mine shaft, also known as a wellbore or a coal mine shaft, is an important engineering structure in underground coal mining. It is a passage connecting the ground and the underground coal mine, and is responsible for the functions of providing personnel, materials, and equipment to enter and exit the mine, ventilation, drainage, and transportation of coal. In order to ensure the safety of the coal mine shaft, it is necessary to measure the seepage water pressure of the coal mine shaft regularly. The purpose of testing the seepage water pressure of the coal mine shaft is to evaluate the seepage water pressure condition of the coal mine shaft, so as to formulate corresponding prevention and control measures to prevent water seepage in the shaft.

[0003] The prior art method for testing the seepage water pressure of a coal mine shaft is to select a test point for testing according to the situation of the mine shaft, usually selecting a place with signs of water seepage or a place where water seepage may occur, and then drilling a small hole near the test point for water pressure testing. A drilling rig is usually used for drilling, and then a water pressure gauge is installed in the borehole to ensure that it can accurately measure the seepage water pressure. For the installation of the water pressure gauge, relevant auxiliary devices are required to support it. For example, the prior art with the announcement number CN213805521U and the name "an open-type osmometer installation auxiliary device" discloses an auxiliary device for installing an osmometer, including an assembled hollow drill rod, an open-type auxiliary fixed cylinder is fixedly installed at the bottom of the assembled hollow drill rod, and two arc-shaped clamps are arranged inside the cylinder, and a plurality of groups of springs are fixedly installed at the bottom of the two arc-shaped clamps, and the two arc-shaped clamps are connected to the cylinder through springs. The device uses a splint to fix the piezometer, places the piezometer in an open auxiliary cylinder, puts the piezometer into a pre-buried position through a hollow drill rod, and then uses a push rod to push it out of the open auxiliary installation cylinder, thereby ensuring the accuracy of the burial depth and position of the piezometer. Summary of the invention

[0004] Technical problem: The coal mine shaft lining penetration water pressure test device disclosed in the prior art uses a cylinder to position the piezometer and then directly pushes it out of the cylinder to determine the position and bury it deeply, but it cannot be supported, and its position cannot be further adjusted. Based on this, the present invention provides a coal mine shaft lining penetration water pressure test device, which can not only install and stably support the piezometer, but also adjust the position of the piezometer in the borehole to a suitable measurement position, and can also advantageously control the timing of the penetration water entering the device.

[0005] Technical solution: The coal mine shaft lining permeability water pressure testing device of the present invention comprises a cylinder for installing a piezometer and provided with a front end cover and a rear end cover, the front end cover of the cylinder is provided with an opening and closing water retaining assembly for controlling the timing of the permeable water entering the cylinder, the rear end cover of the cylinder is slidably provided with an adjustment assembly for driving the cylinder to slide forward and backward, and a sliding support assembly for driving the piezometer to slide and stably support is also provided between the adjustment assembly and the cylinder;

[0006] The sliding support assembly includes a ring fixedly mounted on the middle part of the piezometer body, expansion rings located on the outer edges of both sides of the ring and connected to each other, a spiral air tube mounted on the piezometer and connected to the expansion ring close to the piezometer, and a regulating air bag assembly providing air pressure to the spiral air tube. The spiral air tube is extended under the drive of the air pressure to push the piezometer to slide and to expand the expansion ring to achieve stable support for the positioned piezometer.

[0007] Furthermore, the regulating airbag assembly of the device includes an airbag connected to the other end of the spiral air tube, a motor that squeezes the airbag to generate air pressure, and an extrusion sheet that cooperates to push the airbag is installed on the output shaft of the motor.

[0008] Furthermore, the front end cover of the cylinder of the device is conical in shape, and a number of water-permeable grooves are provided on its outer surface; the opening and closing water-blocking assembly includes a trigger plate and a trigger rod connected to the trigger plate, a water-blocking plug arranged inside the water-permeable grooves is rotated by a limiting shaft, and connecting rods are respectively hinged to the free ends of the water-blocking plugs and the trigger rod.

[0009] Furthermore, the end of the trigger rod of the device is fixedly connected to the middle position of the trigger plate, a plurality of water-permeable holes are also provided on the trigger plate, and a supporting spring is connected between the trigger rod and the end of the front cover.

[0010] Furthermore, threaded sleeves are provided on both sides of the rear end cover of the cylinder of the device, and the adjustment component includes a fixed bracket, a screw rod rotatably provided on the fixed bracket and cooperating with the threaded sleeve, a motor provided with active teeth, and driven teeth respectively meshed with the active teeth and connected to the screw rod. The forward and backward movement of the threaded sleeve is realized by the rotation of the screw rod, thereby driving the cylinder to move forward and backward.

[0011] Furthermore, a sealing cover is provided on the end of the main body of the piezometer of the device near the front end cover, a card cover is threadedly installed on the inner side of the sealing cover, and a pressure-bearing membrane is provided between the card cover and the sealing cover, a string is connected to the center of the rear side of the pressure-bearing membrane, the string passes through the piezometer main body and is connected to a cable, and the cable passes through the rear end cover and extends outward.

[0012] Furthermore, a sealing ring is sleeved on the outer surface of the cover of the device, the interior of the cover is hollow and filled with water-permeable cotton, and a plurality of water holes are arranged on the front and rear ends of the cover.

[0013] Furthermore, the main body of the piezometer of the device is provided with an inner tube for protecting the string, a thermometer is provided on the outside of the inner tube, an induction coil is provided in the inner tube and spirally sleeved on the string, and a protective cover is also provided at the rear end of the inner tube for protecting the string and the cable connector.

[0014] Furthermore, a fixing assembly is provided on one end of the inner tube of the device, and the fixing assembly includes a support ring connected to the inside of the piezometer body, and the inner wall of the support ring extends inwardly and is provided with a plurality of support blocks, and a fixing block matching with the plurality of support blocks is provided on the side surface of the end of the inner tube, and the fixing block is fixed to the support block by bolts.

[0015] Furthermore, the variable calculation formula of the osmometer of the device is:

[0016] ;

[0017] Where: p--the pressure at the current moment relative to the initial moment, MPa; k--the calibration coefficient of the piezometer, Pa / V or kPa / V; F i --The output frequency of the osmometer at the current moment, Hz; F 0 --The output frequency of the osmometer at the initial moment, Hz; KT--The temperature correction coefficient of the osmometer, Pa / °C or kPa / °C; T i --The current temperature value of the piezometer, ℃; T 0 --The temperature value of the piezometer at the initial moment, ℃.

[0018] Beneficial effects: Compared with the prior art, the significant advantages of the present invention are: the device can not only install and stably support the piezometer, but also adjust the position of the piezometer in the borehole to a suitable measuring position, and can also advantageously control the timing of the infiltration water entering the device.

[0019] Specifically: (1) The device is configured by installing a sleeve ring and an expansion ring on the piezometer body. After the air bag is adjusted to be squeezed, the gas can be pushed through the spiral air tube into the expansion ring. When the spiral air tube is inflated, it is pushed by the air pressure and straightened, thereby pushing the piezometer body to slide outward in the mounting cylinder. When it reaches the designated position and cannot slide, the gas will push the expansion ring to fully expand and squeeze it on the inner wall of the mounting cylinder, thereby supporting the piezometer body and keeping it stable and horizontal for easy measurement.

[0020] (2) The device is also provided with a push screw on the fixed bracket, and a threaded sleeve that cooperates with the push screw is connected to the rear end cover. With the cooperation of the motor, the driving gear can be driven to rotate, and due to the meshing of the driving gear and the driven gear, the two screws are driven to rotate, and then the installation cylinder can be pushed to slide into the borehole, and the cylinder is adjusted to a suitable measuring position, driving the piezometer to reach a suitable measuring position.

[0021] (3) The device is also provided with an opening and closing water retaining assembly inside the front end cover of the cylinder. When the cylinder is just placed in the borehole, the trigger rod remains in a relaxed state. At this time, the connecting rod on the trigger rod will push the water retaining plug into the water permeable groove and seal the water permeable groove, keeping it closed. When the piezometer body slides forward and squeezes the trigger rod, the trigger rod is in a compressed state. At this time, the connecting rod will pull the water retaining plug downward to expose the water permeable groove, making it easier for the seepage water to enter the cylinder and contact the piezometer.

[0022] (4) The device also has a fixing component installed inside the piezometer body, and the stability of the protective inner tube can be easily maintained through the cooperation of the fixing component. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the device of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the device of the present invention after being disassembled;

[0025] Figure 3 It is a schematic diagram of the internal structure of the main body of the osmometer of the present invention;

[0026] Figure 4 is a schematic diagram of the cross-sectional structure of the cover of the present invention;

[0027] Figure 5 It is a schematic diagram of the supporting sliding assembly structure of the present invention;

[0028] Figure 6 It is a schematic diagram of the cross-sectional structure of the protection inner cylinder of the present invention;

[0029] Figure 7 It is a schematic diagram of the fixing assembly structure of the present invention;

[0030] Figure 8 It is a schematic diagram of the structure of the regulating assembly of the present invention;

[0031] Fig. 9 A schematic diagram of an adjustable airbag assembly supporting a sliding assembly of the present invention;

[0032] Fig.10 It is a structural schematic diagram of the front end cover of the present invention;

[0033] Fig.11 It is a schematic diagram of the structure of the opening and closing water retaining assembly of the present invention;

[0034] The reference numerals are: 1- osmometer; 2- front end cover; 3- rear end cover; 4- cylinder; 5- collar; 6- expansion ring; 7- spiral air tube; 8- air bag; 9- motor; 10- extrusion sheet; 11- water permeable groove; 12- trigger plate; 13- trigger rod; 14- water stopper; 15- connecting rod; 16- water permeable hole; 17- end; 18- support spring; 19- threaded sleeve; 20- fixed bracket; 21- Screw rod; 22-driving tooth; 23-driven tooth; 24-sealing cover; 25-card cover; 26-pressure-bearing membrane; 27-string wire; 28-cable line; 29-sealing ring; 30-water-permeable cotton; 31-water hole; 32-inner cylinder; 33-thermometer; 34-support ring; 35-support block; 36-fixed block; 37-motor bracket; 38-protection box; 39-induction coil; 40-protective cover; 41-limiting shaft. DETAILED DESCRIPTION

[0035] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings.

[0036] like Figures 1 to 11 As shown, the coal mine shaft lining permeability water pressure testing device of the present invention comprises a cylinder 4 for mounting a piezometer 1, the front end of the cylinder 4 is provided with a front end cover 2, and the rear end is provided with a rear end cover 3. An adjustment component for adjusting the cylinder 4 to a suitable measuring position is provided at the rear end of the cylinder 4, and a sliding support component for pushing the piezometer 1 to slide and stably supporting it is also provided between the cylinder 4 and the adjustment component. An opening and closing water retaining component for controlling the timing of the penetration water entering the cylinder 4 is also provided in the rear end cover 3 of the cylinder 4.

[0037] The piezometer 1 of the present invention comprises a main body, a cover 24 sleeved on the main body, and the cover 24 is close to the end of the front end cover 2 of the cylinder 4. A sealing ring 29 is sleeved on the outer surface of the cover 24, the interior of the cover 24 is hollow, and the interior is filled with water-permeable cotton 30, and a plurality of water holes 31 are arranged on the front and rear ends of the cover 24. A card cover 25 is threadedly installed on the inner side of the cover 24, and a pressure-bearing membrane 26 is arranged between the card cover 25 and the cover 24, and a string 27 is connected to the center of the rear side of the pressure-bearing membrane 26, and the string 27 passes through the main body of the piezometer 1 and is connected to a cable 28, and the cable 28 passes through the rear end cover 3 and extends outward.

[0038] The string 27 in the piezometer 1 is protected by an inner tube 32 disposed in the main body of the piezometer 1. The inner tube 32 is fixed in the main body of the piezometer 1 by a fixing assembly disposed at one end thereof, and the fixing assembly includes a support ring 34 disposed inside the main body of the piezometer 1, and the inner wall of the support ring 34 is provided with a plurality of support blocks 35 extending inwardly, and a fixing block 36 matching with the plurality of support blocks 35 is disposed on the side surface of the end of the inner tube 32, and the fixing block 36 is fixed to the support block 35 by bolts. That is, the fixing block 36 at the end of the inner tube 32 can match with the support block 35 inside the support ring 34, fix the inner tube 32, keep the inner tube 32 stable, and ensure the effective connection between the string 27 and the cable 28.

[0039] A thermometer 33 is provided on the outside of the inner tube 32, and an induction coil 39 is provided inside the inner tube 32 and is spirally sleeved on the string 27. A protective cover 40 for protecting the joint between the string 27 and the cable 28 is also provided at the rear end of the inner tube 32. The induction coil 39 is also equipped with a collection instrument and an excitation circuit. The collection instrument monitoring circuit filters, amplifies, and shapes the induced signal generated by the vibration and then collects it. By measuring the pulse period of the induced signal, the vibration frequency of the string can be measured, and the osmometer variable calculation formula is:

[0040] (1) Calculation formula with temperature measurement function:

[0041] ;

[0042] (2) Calculation formula without temperature measurement function:

[0043] ;

[0044] Where: p is the pressure at the current moment relative to the initial moment, MPa; k is the calibration coefficient of the osmometer, that is, the sensitivity coefficient, Pa / V or kPa / V, which indicates the proportional relationship between the osmometer output and the water pressure. It depends on the type of osmometer and the calibration result. The specific value depends on the model and manufacturing process of the osmometer. It is generally provided by the manufacturer. The common coefficient may be between tens and hundreds of kPa / V; F i--The output frequency of the osmometer at the current moment, Hz; F 0 --The output frequency of the osmometer at the initial moment, Hz; KT--The temperature correction coefficient of the osmometer, used to compensate for the impact of temperature changes on the output of the osmometer, the unit is usually Pa / °C or kPa / °C, the size depends on the material and design of the osmometer, generally provided by the manufacturer, the common temperature correction coefficient may be between a few to tens of kPa / °C; T i --The current temperature value of the piezometer, ℃; T 0 --The temperature value of the piezometer at the initial moment, ℃.

[0045] When the permeated water passes through the cover 24, the pressure-bearing membrane 26 will be deformed by the water pressure, and this tiny deformation will be transmitted to the string 27, causing the string 27 to vibrate, and the square of its vibration frequency is proportional to the pressure on the pressure-bearing membrane 26. At this time, the sensor coil can be driven by the excitation circuit. When the frequency of the excitation signal is close to the natural frequency of the string, the string 27 quickly reaches a resonant state. When the excitation signal is removed, the string 27 still vibrates at its natural frequency for a period of time, and then the induced signal generated by the vibration is filtered, amplified, shaped and collected by the acquisition instrument monitoring circuit. By measuring the pulse period of the induced signal, the vibration frequency of the string 27 can be measured, and by substituting the variable into the calculation formula, the numerical value of the permeated water pressure can be measured.

[0046] The front end cover 2 of the cylinder 4 is conical in shape, and a movable end 17 is provided at its front end. A plurality of water-permeable grooves 11 are provided on the outer surface of the front end cover 2. An opening and closing water-blocking assembly is also provided inside the front end cover 2 of the cylinder 4. The opening and closing water-blocking assembly includes a water-blocking plug 14 rotatably mounted inside the plurality of water-permeable grooves 11, and a connecting rod 15 is also hingedly connected to the free end of the water-blocking plug 14, and the plurality of connecting rods 15 are hingedly mounted on the trigger rod 13. The opening and closing water-blocking assembly also includes a trigger plate 12 arranged inside the cylinder 4, the end of the trigger rod 13 is fixedly connected to the middle position of the trigger plate 12, a plurality of water-permeable holes 16 are also provided on the trigger plate 12, and a support spring 18 is also connected between the trigger rod 13 and the end 17 of the front end cover 2, and a limiting shaft 41 is also provided through the bound end of the water-blocking plug 14, and the limiting shaft 41 is rotatably mounted in the water-permeable groove 11. After the main body of the piezometer 1 slides and contacts the trigger plate 12, the trigger rod 13 can be pushed to slide, thereby cooperating with the opening and closing water retaining assembly. The water-permeable hole 16 opened on the trigger plate 12 can facilitate the penetration water to pass through into the main body of the piezometer 1 to measure the penetration water pressure.

[0047] The adjustment assembly for driving the cylinder 4 to the appropriate measuring position includes a fixed bracket 20, a plurality of screw rods 21 rotatably mounted on the fixed bracket 20, preferably two screw rods 21, and a threaded sleeve 19 for threading the screw rods 21 is mounted on both sides of the rear end cover 3 of the cylinder 4. The ends of the screw rods 21 are provided with driven teeth 23, and the same driving tooth 22 is meshed between the two driven teeth 23. A motor bracket 37 is also mounted on the side of the fixed bracket 20 close to the driving tooth 22, and a motor 9 is mounted on the motor bracket 37, and the output shaft of the motor 9 is connected to the driving tooth 22. That is, the motor 9 drives the driving tooth 22 to rotate, and through the meshing of the driving tooth 22 and the two driven teeth 23, the two screw rods 21 can be driven to rotate synchronously in the same direction, and when the screw rod 21 cooperates with the threaded sleeve 19, it can push the cylinder 4 to slide to the appropriate measuring position, and facilitate the cylinder 4 to abut against the inner wall of the borehole to maintain stability.

[0048] The sliding support assembly includes a collar 5 fixedly sleeved on the middle part of the main body of the piezometer 1, two expansion rings 6 connected to each other are installed on the outer edges of both sides of the collar 5, and a spiral air tube 7 is also sleeved on the main body of the piezometer 1, one end of the spiral air tube 7 is connected to the expansion ring 6 close to it, and the other end of the spiral air tube 7 passes through the rear end cover 3 and is fixed inside the rear end cover 3, and a protection box 38 connected to the fixed bracket 20 is also provided on the side of the fixed bracket 20, and an air bag 8 is provided inside the protection box 38, and the other end of the spiral air tube 7 is connected to the air bag 8. The sliding support assembly also includes a motor 9 installed inside the protection box 38, and an extrusion sheet 10 for cooperating to push the air bag 8 is installed on the output shaft of the motor 9, and the extrusion sheet 10 slides close to the inner wall of the protection box 38.

[0049] During installation, in order to keep the main body of the osmometer 1 stable and level, when the motor 9 is started, the extrusion sheet 10 can be pushed to compress the airbag 8. When the airbag 8 is squeezed, the gas can be transported to the expansion ring 6 through the spiral air tube 7. In addition, the spiral air tube 7 is pushed by the air pressure and will straighten, thereby pushing the main body of the osmometer 1 to slide close to the front end cover 2 in the cylinder 4. During the sliding process of the main body of the osmometer 1 close to the front end cover 2, it will also contact the trigger rod 13, thereby pushing the trigger rod 13 to slide toward the front end cover 2. When the trigger rod 13 slides, it can pull the water stopper 14 to flip downward through the connecting rod 15. When the water stopper 14 flips out of the water permeable groove 11, the permeated water can enter the cylinder 4 and enter the main body of the osmometer 1 through the water permeable groove 11 to measure the permeable water pressure. When the trigger rod 13 is squeezed and slides to the extreme position, the main body of the piezometer 1 will no longer be able to slide. At this time, the gas will push the expansion ring 6 to fully expand and squeeze on the inner wall of the cylinder 4, thereby supporting the main body of the piezometer 1 and keeping the main body of the piezometer 1 stable and horizontal for easy measurement.

[0050] The implementation principle of the coal mine shaft lining penetration water pressure testing device of the present invention is:

[0051] Before installation, the main body of the piezometer 1 is turned into the cylinder 4, and the sealing sleeve of the rear end cover 3 is set on the rear end of the cylinder 4, then the two screws 21 on the fixed bracket 20 are aligned with the two threaded sleeves 19 on both sides of the rear end cover 3, and the motor 9 is started. When the motor 9 is started, the active gear 22 can be driven to rotate. Through the meshing cooperation of the active gear 22 and the two driven teeth 23, the two screws 21 can be pushed to rotate synchronously in the same direction, and the screws 21 can push the cylinder 4 to slide when they cooperate with the threaded sleeves 19, so that the cylinder 4 can be easily abutted against the inner wall of the borehole and remain stable. When the opening and closing water retaining assembly is set, the water retaining plug 14 will be sealed in the water permeable groove 11. At this time, although the cylinder 4 is installed in the borehole, the infiltrated water cannot enter the cylinder 4.

[0052] After the cylinder 4 is fixed, the motor 9 can be started, and the output shaft of the motor 9 can push the extrusion sheet 10 to compress the airbag 8. When the airbag 8 is squeezed, the gas can be transported to the expansion ring 6 through the spiral air pipe 7. In addition, when the spiral air tube 7 is pushed by the air pressure, it will straighten, thereby pushing the main body of the osmometer 1 to slide close to the front end cover 2 in the cylinder 4. In the process of the osmometer 1 main body sliding close to the front end cover 2, it will also contact the trigger plate 12, thereby pushing the trigger rod 13 to slide toward the front end cover 2. The trigger rod 13 will also compress the support spring 18 when sliding, and the connecting rod 15 can pull the water stop 14 to flip downward. When the water stop 14 is flipped out of the water permeable groove 11, the infiltrated water can enter the cylinder 4 and enter the main body of the osmometer 1 through the water permeable groove 11, which is convenient for measuring the infiltrated water pressure. When the trigger rod 13 is squeezed and slides to the extreme position, the main body of the osmometer 1 will no longer be able to slide. At this time, the gas will push the expansion ring 6 to fully expand and squeeze on the inner wall of the cylinder 4, thereby supporting the main body of the osmometer 1 and keeping the main body of the osmometer 1 stable and horizontal.

[0053] When the permeated water passes through the cover 24, the pressure-bearing membrane 26 will be deformed by the water pressure, and this tiny deformation will be transmitted to the string 27, causing the string 27 to vibrate, and the square of its vibration frequency is proportional to the pressure on the pressure-bearing membrane 26. At this time, the sensor coil can be driven by the excitation circuit. When the frequency of the excitation signal is close to the natural frequency of the string, the string 27 quickly reaches a resonant state. When the excitation signal is removed, the string 27 still vibrates at its natural frequency for a period of time, and then the induced signal generated by the vibration is filtered, amplified, shaped and collected by the acquisition instrument monitoring circuit. By measuring the pulse period of the induced signal, the vibration frequency of the string can be measured, and by substituting the variable into the calculation formula, the numerical value of the permeated water pressure can be measured.

Claims

1. A coal mine shaft lining penetration water pressure testing device, characterized in that: The device comprises a cylinder (4) for mounting an osmometer (1) and provided with a front end cover (2) and a rear end cover (3); the front end cover (2) of the cylinder (4) is provided with an opening and closing water retaining assembly for controlling the timing of the permeated water entering the cylinder (4); the rear end cover (3) of the cylinder (4) is slidably provided with an adjustment assembly for driving the cylinder (4) to slide forward and backward; and a sliding support assembly for driving the osmometer (1) to slide and stably support the osmometer (1) is also provided between the adjustment assembly and the cylinder (4); The sliding support assembly comprises a sleeve (5) fixedly sleeved on the middle part of the main body of the piezometer (1), expansion rings (6) located on the outer edges of both sides of the sleeve (5) and connected to each other, a spiral air tube (7) sleeved on the piezometer (1) and connected to the expansion ring (6) close to the piezometer (1), and a regulating air bag assembly for providing air pressure to the spiral air tube (7); the spiral air tube (7) is extended under the drive of the air pressure to push the piezometer (1) to slide, and the expansion ring (6) is expanded to achieve stable support for the positioned piezometer (1); The front end cover (2) of the cylinder (4) is conical in shape, and a plurality of water-permeable grooves (11) are provided on its outer surface; the opening and closing water-blocking assembly comprises a trigger plate (12) and a trigger rod (13) connected to the trigger plate (12); a water-blocking plug (14) arranged inside the plurality of water-permeable grooves (11) is rotated through a limit shaft (41), and a connecting rod (15) respectively hinged to the free ends of the plurality of water-blocking plugs (14) and the trigger rod (13); the end of the trigger rod (13) is fixedly connected to the middle position of the trigger plate (12); the trigger plate (12) is also provided with a plurality of water-permeable holes (16); and a supporting spring (18) is connected between the trigger rod (13) and the end (17) of the front end cover (2); the osmometer (1) comprises a main body and a cover (24) sleeved on the main body, and the cover (24) is close to the end of the front end cover (2) of the cylinder (4).

2. The coal mine shaft lining penetration water pressure testing device according to claim 1 is characterized in that: The regulating airbag assembly comprises an airbag (8) connected to the other end of the spiral air tube (7) and a motor (9) for providing power for squeezing the airbag (8). An squeezing sheet (10) for cooperating with pushing the airbag (8) is mounted on the output shaft of the motor (9).

3. The coal mine shaft lining penetration water pressure testing device according to claim 1 is characterized in that: Threaded sleeves (19) are provided on both sides of the rear end cover (3) of the cylinder (4). The adjustment assembly comprises a fixed bracket (20), a screw rod (21) rotatably provided on the fixed bracket (20) and cooperating with the threaded sleeve (19), a motor (9) provided with driving teeth (22), and driven teeth (23) respectively meshing with the driving teeth (22) and connected to the screw rod (21). The screw rod (21) is rotated to realize the forward and backward movement of the threaded sleeve (19), thereby driving the cylinder (4) to move forward and backward.

4. The coal mine shaft lining penetration water pressure testing device according to claim 1, characterized in that: A sealing cover (24) is sleeved on the end of the main body of the piezometer (1) near the front end cover (2), a clamping cover (25) is threadedly mounted on the inner side of the sealing cover (24), and a pressure-bearing membrane (26) is provided between the clamping cover (25) and the sealing cover (24), a string (27) is connected to the rear center of the pressure-bearing membrane (26), and the string (27) passes through the main body of the piezometer (1) and is connected to a cable (28), and the cable (28) passes through the rear end cover (3) and extends outward.

5. The coal mine shaft lining penetration water pressure testing device according to claim 4 is characterized in that: A sealing ring (29) is sleeved on the outer surface of the sealing cover (24); the interior of the sealing cover (24) is hollow and filled with water-permeable cotton (30); and a plurality of water holes (31) are provided on the front and rear ends of the sealing cover (24).

6. The coal mine shaft lining penetration water pressure testing device according to claim 4, characterized in that: The main body of the osmometer (1) is provided with an inner cylinder (32) for protecting the string (27), a thermometer (33) is provided on the outside of the inner cylinder (32), an induction coil (39) is provided in the inner cylinder (32) and is spirally sleeved on the string (27), and a protective sleeve (40) for protecting the joint between the string (27) and the cable (28) is also provided at the rear end of the inner cylinder (32).

7. The coal mine shaft lining penetration water pressure testing device according to claim 6, characterized in that: A fixing assembly is also provided at one end of the inner tube (32), the fixing assembly comprising a support ring (34) connected to the inside of the main body of the piezometer (1), and a plurality of support blocks (35) are provided on the inner wall of the support ring (34) extending inwardly, and a fixing block (36) matching with the plurality of support blocks (35) is provided on the side surface of the end of the inner tube (32), and the fixing block (36) is fixed to the support block (35) by bolts.

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