CN212301025U

CN212301025U - Deep hole airtight pressure maintaining sampler for coal mine

Info

Publication number: CN212301025U
Application number: CN202020894453.4U
Authority: CN
Inventors: 张建国; 吕有厂; 李喜员; 李兰芳; 寇建新; 张晋京; 陈星明; 王晨辉; 王峰; 冯文涛; 刘磊; 路广奇; 黄再娟
Original assignee: Zhengzhou Huikuang Intelligent Technology Co ltd; Pingdingshan Tianan Coal Mining Co Ltd; China Pingmei Shenma Energy and Chemical Group Co Ltd
Current assignee: Zhengzhou Huikuang Intelligent Technology Co ltd; Pingdingshan Tianan Coal Mining Co Ltd; China Pingmei Shenma Energy and Chemical Group Co Ltd
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2021-01-05
Anticipated expiration: 2030-05-25

Abstract

The utility model provides a coal mine is with airtight pressurize sampler of deep hole, includes outer tube subassembly, dabber, deposits appearance subassembly and drive assembly, the dabber divide into first shaft segment, second shaft segment and third shaft segment triplex, sets up first boss between second shaft segment and the third shaft segment, and drive assembly includes first piston, second piston, impels the sleeve pipe and can control the drive mechanism who deposits the appearance subassembly switching, sets up first piston between second shaft segment and the outer tube, and the propelling sleeve pipe is established to dabber outside cover, and the top of the one end of impelling the sleeve pipe is leaned on first piston, and the other end is leaned on to the protruding top of dabber drive mechanism, third shaft segment with it sets up the second piston to impel between the sleeve pipe. Compared with the prior art, the boss cooperation that sets up on this application adopted double piston and the shaft part makes the piston can carry out twice independent removal for the conversion of depositing appearance subassembly can realize closure, opening, closure state prevents before the sample that the subassembly of depositing is polluted, makes the subassembly of depositing appearance sealed after the sample.

Description

Deep hole airtight pressure maintaining sampler for coal mine

Technical Field

The utility model belongs to the technical field of coal seam gas content detects, concretely relates to airtight pressurize sampler of deep hole for coal mine.

Background

The coal seam gas content is an important index for measuring the occurrence condition of coal seam gas, and is an important reference basis for predicting the gas emission quantity of a mine, guiding the gas extraction design of a coal mine and judging the gas treatment effect. At present, the method for measuring the gas content of the coal bed mainly comprises an indirect method and a direct method, wherein the indirect method is used for calculating the gas content of the coal bed by using a Langmuir formula according to the actually measured parameters of the gas pressure of the coal bed, the adsorption constant of coal, industrial analysis and the like. The method has the advantages of long test period, high cost and less adoption in coal mine sites. The method mainly adopts a direct method in the actual coal seam gas content determination, wherein the direct method comprises the steps of receiving coal dust at an orifice or drilling a coal core at the bottom of a hole for sampling, and determining and calculating the gas loss amount, the desorbed gas amount and the residual gas amount in the sampling process, wherein the sum of the three is the coal seam gas content. The method has the advantages that the coal scraps are received and taken from the orifice in a mode of pressing air into the hole to discharge the coal dust, the process is simple, the operation is easy, the influence of the residual coal dust on the hole wall on the sampling accuracy is large, the integrity of the coal sample is poor, and especially under the condition of a soft coal bed or large drilling depth, the influence of the residual coal dust on the content of the hole wall is large. The sampling mode can not ensure that a coal sample at a specified depth can be obtained, and is mainly used for measuring the gas content by taking the coal sample in a shallow hole. The method for measuring the gas content by drilling the coal core comprises the steps of drilling a hole to a preset depth by using a drilling machine, and drilling the coal core by replacing a sampler, wherein the sampler generally comprises a core barrel and a sampling drill bit matched with the core barrel, the conventional sampler is generally open, and generally cannot meet the requirements of closed pressure-maintaining sampling of sealing the core barrel before sampling, opening during sampling and sealing again after sampling, so that the broken coal and rock debris in the hole are easily poured into the sampling barrel before the sampling at the bottom of the hole in the process of opening the sampler into a drill hole, the sample obtained from the sampler contains a large amount of drill hole return slag, the deeper the drill hole is, the more the slag blocks in the sample are, the less effective sampling is, and the loss amount of the gas analyzed from the coal sample is difficult to measure due to exposure of the coal sample due to the incapability of sealing in the drill withdrawal process, the measurement accuracy of the gas content of the coal sample is influenced, and the gas content result of the measured coal, is not beneficial to the establishment and implementation of the gas control measures. Particularly, when the sampling depth of a drill hole is larger than 30 meters, the larger the sampling depth is, the longer the coal sample exposure time in the drill returning process is, and the larger the gas loss is. Therefore, how to meet the requirement of deep hole sealing pressure maintaining sampling, and reducing the gas loss in the sampling process is the key for accurately measuring the gas content of the deep hole coal seam.

In order to solve the problem, application number 201610072834.2's patent discloses a airtight sampling device of gas appearance, contains outer tube, inner tube and double-deck pipe, the outer tube contains the connecting mandrel of control mud access way, drill bit and is located the connecting pipe subassembly between connecting mandrel and the drill bit, the inner tube contains adapter sleeve, last ball valve, sealed tube and lower ball valve at least, the rotatable registrate in connecting the mandrel of one end of adapter sleeve is equipped with the core pipe between ball valve and the lower ball valve and is regarded as the storage carrier of rock core, goes up the closing of ball valve and lower ball valve and can seal the core pipe, the end of double-deck pipe supports and leans on in connecting the mandrel, and can be under the control of connecting the mandrel back-and-forth movement, and the front end is equipped with the control element of ball valve and lower ball valve switching in order to realize the switching of ball valve about advancing or retreat. However, the technical scheme provided by the patent has certain technical problems that in the process that the sampling device drills underground, the lower ball valve of the inner pipe of the sampling device is in an open state, so that other impurities enter the core barrel in the drilling process, and the detection effect is influenced because the sample is polluted; when the ball valve is closed, a rubber ball needs to be placed into the connecting mandrel, theoretically, when slurry impacts the rubber ball, the rubber ball is stably located above the conical hole under the action of impact force, so that the rubber ball can block the conical hole, further, the flow path of the slurry is changed into the flow path of the slurry, and power is provided for closing the ball valve; because the sample of getting contains certain gas composition, these gas partly is adsorbed by the sample, partly is in the core tube after desorption from the sample, so need ensure gas and can not lose when taking out the sample from the sampling device after accomplishing sample work, but the sealed effect of this patent core tube relies on the ball valve and closes the realization of ball valve down, two ball valves of this patent can rotate with step when taking out the sample, can't directly collect desorption gas, the gas that has desorbed in the sample at this moment easily dissipates, lead to sample work to go wrong.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is that the contaminated problem of coal appearance leads to in the sampler is easily entered into to the garrulous coal detritus of uncovered sampler in the drilling of sample process, for solving above-mentioned problem, the utility model provides a coal mine is with the airtight pressurize sampler of deep hole, adopts double-piston structure and propulsion sleeve, drive mechanism cooperation to make the down in-process of sampler deposit appearance subassembly and be in the closed condition and when beginning to sample a piston drive when depositing the appearance subassembly and be converted into the open condition, accomplishes another piston drive after the sampling and deposits the appearance subassembly and close once more for the sample can not receive the pollution.

The purpose of the utility model is realized with the following mode:

a deep hole airtight pressure maintaining sampler for a coal mine comprises an outer pipe assembly, a mandrel, a sample storage assembly and a driving assembly, wherein the outer pipe assembly comprises a drill rod joint, an outer sleeve and a drill bit which are sequentially connected and have a hollow structure, the outer pipe assembly is internally provided with the mandrel and the sample storage assembly, one end of the mandrel is connected with the drill rod joint, the other end of the mandrel is connected with the sample storage assembly, the mandrel, the sample storage assembly and the outer sleeve are provided with the driving assembly, a channel for water flow to enter and exit is arranged in the mandrel, the mandrel is divided into a first shaft section, a second shaft section and a third shaft section, a first boss is arranged between the second shaft section and the third shaft section, the driving assembly comprises a first piston, a second piston, a propelling sleeve and a transmission mechanism capable of controlling the sample storage assembly to open and close, the first piston is arranged between the second shaft section and the outer sleeve, one end of the propelling sleeve abuts against the first piston, the other end of the propelling sleeve protrudes towards the mandrel and abuts against the transmission mechanism, and a second piston is arranged between the third shaft section and the propelling sleeve.

The first shaft section and the second shaft section of the mandrel are internally provided with first flow through holes, and the second shaft section of the mandrel is internally provided with second flow through holes.

And a second boss is arranged at the front end of the drill rod joint, and a gap is formed between the second boss and the opening of the second shaft section, which is positioned in the first flow through hole.

The sample storage assembly comprises a coal sample tube base, a coal sample tube, a ball valve body, a ball valve core and a ball valve gland, one end of the coal sample tube base is connected with a core shaft, the other end of the coal sample tube is connected with the coal sample tube, the coal sample tube is connected with the ball valve body, the ball valve core is arranged in the ball valve body, and a gear capable of driving the ball valve core to open and close is arranged on the side face of the ball valve core.

The coal sample tube base is characterized in that a first screw hole and a second screw hole are respectively formed in two ends of the coal sample tube base, the first screw hole and the second screw hole are communicated through a first through hole, a compression screw, a compression spring and a sealing steel ball capable of being pushed by the compression spring to seal the first through hole are sequentially arranged in the second screw hole, and a second through hole is axially formed in the compression screw.

The transmission mechanism capable of controlling the sample storage assembly to be opened and closed comprises a pushing rack pipe and a pushing rack, the pushing rack pipe is sleeved on the outer side of the sample storage assembly, one end of the pushing rack pipe abuts against the pushing sleeve, the pushing rack pipe is connected with the pushing rack, and the pushing rack is meshed with the gear.

The utility model discloses a drill pipe joint, including drill pipe joint, first piston, second piston, push sleeve pipe, coal sample pipe base, ball valve body, drill rod joint, the position that the drill pipe joint outside contacted with the overcoat pipe sets up the sealing washer, the inboard and the outside of first piston all set up the sealing washer, the inboard and the outside of second piston all set up the sealing washer, the outside of propelling sleeve pipe sets up the sealing washer, the position that the coal sample pipe base outside contacted with the coal sample pipe sets up the sealing washer, the position that ball valve body and ball valve gland contacted sets up the sealing washer.

Compared with the prior art, the double-piston structure is matched with the first boss arranged on the shaft section, so that the pistons can independently move twice, after one piston moves to drive the sample storage assembly to be opened and closed, the piston is limited by the boss and does not move any more, the sample storage assembly can be in a set state for a certain time, when the opening and closing state of the sample storage assembly needs to be converted, the other piston is driven to move, at the moment, the first piston cannot move due to the limitation of the first boss, the sample storage assembly is driven to be converted into the opening and closing state after the other piston moves, secondary conversion of the opening and closing state of the sample storage assembly is realized through the mode, in the prior art, the pistons can only move on the same path, the sample storage assembly can be kept in the opening and closing state only by moving to the tail end of the path after the pistons start to move, and the sample storage assembly cannot be stably closed and can not be sequentially positioned in a certain time, The sample storage assembly can be set to be in a closed state in an initial state to prevent the interior of the sample storage assembly from being polluted, when the sample storage assembly reaches an area needing sampling, after the first piston moves and pushes the push sleeve to move for a certain distance, the push sleeve drives the transmission mechanism capable of controlling the sample storage assembly to be opened and closed to realize the switching of the open and closed states of the sample storage assembly, so that the sample storage assembly is switched from the closed state to the open state and then performs sampling work, after accomplishing the sample, the second piston removes, when the second piston contact impels the sleeve pipe to the bellied one end of dabber, the second piston promotes and impels the sleeve pipe to continue to move, make impel the drive of sleeve pipe and can control the drive mechanism of sample storage subassembly switching to realize the reconversion to sample storage subassembly switching state, sample storage subassembly is converted into the closure state from the opening state, make sample storage subassembly be in sealed pressurize state, and then can ensure the validity of the coal sample of getting, the work efficiency of sampler has been improved, the degree of accuracy of coal sample gas content survey result is improved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged schematic view of the X region in fig. 1.

Fig. 3 is an enlarged schematic view of the Y region in fig. 1.

Fig. 4 is a schematic top view of the engagement portion of the propulsion rack and gear of fig. 1.

In the drawings, 1 is a drill pipe joint; 2 is an outer sleeve; 3 is a mandrel; 301 is a first shaft segment; 302 is a second shaft segment; 303 is a third shaft segment; 4 is a first piston; 5 is a second piston; 6 is a push sleeve; 7 is a pushing rack pipe; 8 is a coal sample tube base; 9 is a sealing steel ball; 10 is a compression spring; 11 is a compression screw; 12 is a coal sample tube; 13 is a push rack; 14 is a gear; 15 is a seal ring; 16 is an outer drill bit; 17 is an inner drill bit; 18 is a ball valve body; 19 is a ball valve spool; 20 is a ball valve gland; 21 is a first boss; 22 is a second boss; 23 is a first flow through hole; 24 is the opening of the first flow through hole in the second shaft section; 25 is a second flow-through hole; 26 is the opening of the second flow bore in the second shaft section; 27 is a first screw hole; 28 is a second screw hole; 29 is a first through hole; 30 is a second through-hole; 31-38 are all sealing rings.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings and embodiments, which are to be understood as illustrative only and not limiting the scope of the invention. It should be noted that the terms "inner" and "outer" used in the following description refer to directions toward and away from, respectively, the geometric center of a particular component, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, the "front" being the direction in which the drill bit is located and the "rear" being the direction in which the pipe joint 1 is located.

As shown in fig. 1-4, a deep hole closed pressure-maintaining sampler for coal mine comprises an outer pipe assembly, a mandrel 3, a sample storage assembly and a driving assembly, wherein the outer pipe assembly comprises a drill rod joint 1, an outer sleeve 2 and a drill bit which are connected in sequence, the drill rod joint 1 is of a hollow structure, the hollow structure refers to a cavity which is axially arranged inside a part and can be communicated with two ends of the part, the cavity is a hollow area of the hollow structure, the hollow area of the drill rod joint 1 refers to a cavity which is arranged inside the drill rod joint 1 and is communicated with two front and rear end faces of the drill rod joint 1, the hollow area of the drill rod joint 1 forms a channel which can enable high-pressure water flow to pass through, one end of the drill rod joint 1 is used for being connected with a drill rod, the outer sleeve 2 is sleeved outside the other end, one end of the outer, the inner drill bit 17 is arranged on the inner side of the outer drill bit 16, a double-layer drill bit structure formed by matching the inner drill bit 17 and the outer drill bit 16 can improve the sampling efficiency of the coal sample, meanwhile, the inner drill bit 17 and the outer drill bit 16 are both of hollow structures, and a channel capable of allowing the coal sample to pass through is formed in the hollow areas of the inner drill bit 17 and the outer drill bit 16; a mandrel 3 and a sample storage assembly are arranged in the outer pipe assembly, the outer pipe assembly is of a hollow structure, a space with a proper size is arranged in the area near the axis and used for arranging the mandrel 3 and the sample storage assembly, one end of the mandrel 3 is connected with the drill rod joint 1, the other end of the mandrel 3 is connected with the sample storage assembly, a driving assembly is arranged between the mandrel 3 and the sample storage assembly and the outer sleeve 2, and a space with a proper size is arranged between the mandrel 3 and the sample storage assembly and between the outer sleeve 2 according to the actual size of the driving assembly so that the driving assembly can be arranged between the mandrel 3 and the sample storage; a channel for water flow to enter and exit is arranged in the mandrel 3, the mandrel 3 is divided into a first shaft section 301, a second shaft section 302 and a third shaft section 303, the diameters of the first shaft section 301, the second shaft section 302 and the third shaft section 303 need to be selected according to actual needs, a first boss 21 is arranged between the second shaft section 302 and the third shaft section 303, the first shaft section 301 is connected with the drill rod joint 1, and under the relatively optimal condition, external threads arranged on the outer side surface of the first shaft section 301 are completely meshed with internal threads arranged on the inner side surface of the drill rod joint 1, so that the first shaft section 301 can be in threaded connection with the drill rod joint 1, the first shaft section 301 is completely positioned in a hollow area of the drill rod joint 1, and the third shaft section 303 of the mandrel 3 is connected with a sample storage assembly; the driving assembly comprises a first piston 4, a second piston 5, a pushing sleeve 6 and a transmission mechanism capable of controlling the sample storage assembly to open and close, the first piston 4 is arranged between the second shaft section 302 and the outer sleeve 2, the first piston 4 is of an annular structure and is sleeved on the second shaft section 302, the inner side of the first piston 4 is tightly attached to the side surface of the second shaft section 302, the outer side of the first piston 4 is tightly attached to the inner side surface of the outer sleeve 2, the first piston 4 can slide along the second shaft section 302, the pushing sleeve 6 is sleeved on the outer side of the mandrel 3, a certain space is formed between the pushing sleeve 6 and the mandrel 3 to form a cavity, the outer side surface of the pushing sleeve 6 is tightly attached to the inner side surface of the outer sleeve 2, and the rear end of the pushing sleeve 6 is abutted to the front side surface of the first piston 4, so that when the first piston 4 moves forwards, a forward pushing force can, the front end of the propelling sleeve 6 protrudes towards the mandrel 3 and abuts against the transmission mechanism, a second piston 5 is arranged between the third shaft section 303 and the propelling sleeve 6, the second piston 5 is of an annular structure and is sleeved on the third shaft section 303, the second piston 5 can slide back and forth along the third shaft section 303, the inner side of the second piston 5 is tightly attached to the third shaft section 303 of the mandrel 3, the outer side of the second piston 5 is tightly attached to the inner side surface of the propelling sleeve 6, when the second piston 5 moves forward along the third shaft section 303 to the front end of the area between the third shaft section 303 and the propelling sleeve 6, the second piston 5 is blocked by the protrusion at the front end of the propelling sleeve 6, at the moment, if the second piston 5 continues to move forward, the protrusion at the front end of the propelling sleeve 6 can be pushed forward by the forward pushing force of the second piston 5, so that the propelling sleeve 6 moves forward along with the second piston 5, and the transmission mechanism is sleeved on the sample storage component, the rear end of the transmission mechanism is abutted against the front end of the propelling sleeve 6, forward thrust can be generated on the transmission mechanism when the propelling sleeve 6 moves forward, the transmission mechanism is further pushed to move forward along with the forward movement of the propelling sleeve 6, the transmission mechanism can transmit power to a switch of the sample storage assembly, the transmission mechanism can control the opening and closing of the sample storage assembly, the principle that the transmission mechanism controls the opening and closing of the sample storage assembly is that the propelling sleeve 6 transmits the power to the transmission mechanism, the transmission mechanism transmits the power to the sample storage assembly, and the sample storage assembly obtains power for switching the opening and closing states.

A first flow through hole 23 is formed in the first shaft section 301 and the second shaft section 302 of the mandrel 3, one part of the first flow through hole 23 is located in the first shaft section 301, the other part of the first flow through hole 23 is located in the second shaft section 302, an opening on the rear side of the first flow through hole 23 is located on the rear end face of the first shaft section 301, and an opening on the front side of the first flow through hole 23 is located on the side face of the second shaft section 302, so that the first flow through hole 23 can be communicated with an area of an inner cavity of the drill rod joint 1 and an area between the drill rod joint 1 and the first piston 4, the inner diameter size of the first flow through hole 23 can be set according to actual working requirements, and the number of openings of the first flow through hole 23 can; the second flow through hole 25 is arranged in the second shaft section 302 of the mandrel 3, the opening 26 of the second flow through hole, which is located at the second shaft section, is arranged at the side surface of the second shaft section 302, and the position of the opening needs to meet the condition that the opening is just located at the rear side of the first piston 4 when the first piston 4 moves forward to the position of the first boss 21, and the opening at the front side of the second flow through hole 25 is located at the front end surface of the first boss 21, so that when the first piston 4 contacts the first boss 21, the second flow through hole 25 can communicate the area between the drill rod joint 1 and the first piston 4 and the area between the second piston 5 and the first boss 21, the inner diameter size of the second flow through hole 25 can be set according to actual working requirements, and the number of the openings of the second flow through hole 25 can also be set according to actual working requirements.

The front end of tool joint 1 sets up second boss 22, and there is the space between second boss 22 and the opening 24 that first flow through hole is located the second shaft section for when the rear end laminating tool joint 1 of first piston 4, first flow through hole is located the opening 24 of second shaft section and can not be by first piston 4 shutoff, and high-pressure rivers can enter into the rear side of first piston 4 along first flow through hole 23, and then can exert forward thrust to first piston 4 from the rear side and promote first piston 4 and move forward.

The sample storage assembly comprises a coal sample tube base 8, a coal sample tube 12, a ball valve body 18, a ball valve core 19 and a ball valve gland 20, wherein the coal sample tube base 8 is used for bearing the coal sample tube 12 and sealing one end of the coal sample tube 12 to prevent coal samples and gas leakage in the coal sample tube 12, the rear end of the coal sample tube base 8 is connected with a third shaft section 303 of the mandrel 3, the front end of the coal sample tube base 8 is connected with the rear end of the coal sample tube 12, the front end of the coal sample tube 12 is connected with the rear end of the ball valve body 18, the ball valve body 18 is connected with the ball valve gland 20, the ball valve core 19 is arranged between the ball valve body 18 and the ball valve gland 20, a gear 14 is arranged on the side face of the ball valve core 19, the gear 14 is connected with a rotating shaft of the ball valve core 19, the gear 14 can drive the ball valve core 19 to synchronously rotate when rotating, and the ball valve core 19 can complete switching of opening and closing.

The rear front end of the coal sample tube base 8 is respectively provided with a first screw hole 27 and a second screw hole 28, the first screw hole 27 is positioned at the rear end of the coal sample tube base 8, the second screw hole 28 is positioned at the front end of the coal sample tube base 8, a through hole is arranged in the coal sample tube base 8, the first screw hole 27 and the second screw hole 28 are communicated through the through hole, a compression screw 11 is arranged in the second screw hole 28, the external thread of the compression screw 11 is matched with the internal thread of the second screw hole 28, so that the compression screw 11 can rotate to enter the second screw hole 28, the compression screw 11, a compression spring 10 and a sealing steel ball 9 are sequentially arranged in the second screw hole 28, after the compression screw 11 is arranged in the second screw hole 28, the compression screw 11 can backward compress the compression spring 10 in the backward entering process, the compression spring 10 synchronously backward extrudes the sealing steel ball 9, the sealing steel ball 9 is subjected to the backward elasticity of the compression spring 10, make compression spring 10 can promote to seal first through-hole 29 of steel ball 9 closure, ensure that coal sample pipe 12 is in airtight pressurize state, gas can not leak from first through-hole 29 in the coal sample pipe 12, axial setting second through-hole 30 in the housing screw 11, when needs follow coal sample pipe 12 and gather gas, forward roof pressure through the thimble seals steel ball 9, the encapsulated situation of first through-hole 29 is relieved, gas can enter into second screw 28 along second through-hole 30 in the coal sample pipe 12, and discharge behind first through-hole 29, can realize falling the accurate measurement of the gas volume of coal sample desorption in coal sample pipe 12 very conveniently, need not be with the help of extra gas extraction instrument, the probability that the gas leakage takes place can more effectually to this application for the condition that directly open the ball valve among the prior art and carry out gas extraction.

The transmission mechanism capable of controlling the sample storage assembly to be opened and closed comprises a pushing rack pipe 7 and a pushing rack 13, the pushing rack pipe 7 is sleeved outside the sample storage assembly, the rear end of the pushing rack pipe 7 abuts against the front end of a pushing sleeve 6, forward pushing force can be generated on the pushing rack pipe 7 when the pushing sleeve 6 moves forward, the pushing rack pipe 7 is further pushed to move forward along with the forward movement of the pushing sleeve 6, the front end of the pushing sleeve 6 is connected with the pushing rack 13, the pushing rack 13 can move forward along with the forward movement of the pushing rack pipe 7, the pushing rack 13 is meshed with a gear 14, the gear 14 can be driven to rotate when the pushing rack 13 moves, and meanwhile, the ball valve core 19 is in a closed state when the pushing rack 13 is meshed with the gear 14 under the set initial state.

A sealing ring 31 is arranged at the position where the outer side of the drill rod joint 1 is contacted with the outer sleeve 2, a sealing ring 32 and a sealing ring 33 are arranged at the inner side of the first piston 4, a sealing ring 35 and a sealing ring 34 are arranged at the inner side of the second piston 5, a sealing ring 36 is arranged at the outer side of the pushing sleeve 6, a sealing ring 37 is arranged at the position where the outer side of the coal sample tube base 8 is contacted with the coal sample tube 12, a sealing ring 38 is arranged at the position where the outer side of the ball valve body 18 is contacted with the coal sample tube 12, a sealing ring 15 is arranged at the position where the, the type of a proper sealing ring is selected according to actual working requirements, a sealing ring 31 is arranged at a position where the outer side of the drill rod joint 1 is contacted with the outer sleeve 2, so that the sealing effect between the outer side of the drill rod joint 1 and the outer sleeve 2 is improved, and high-pressure water is prevented from seeping along a gap between the outer side of the drill rod joint 1 and the outer sleeve 2 to influence the pushing effect of the high-pressure water on the first piston 4; the sealing effect between the inner side of the first piston 4 and the second shaft section 302 and the sealing effect between the outer side of the first piston 4 and the outer sleeve 2 are improved by arranging the sealing rings on the inner side and the outer side of the first piston 4, high-pressure water is prevented from permeating into the front side of the first piston 4 along gaps between the first piston 4 and the second shaft section 302 and the outer sleeve 2, and the forward thrust of the high-pressure water on the first piston 4 is reduced; the sealing effect between the inner side of the second piston 5 and the third shaft section 303 and the sealing effect between the outer side of the second piston 5 and the propelling sleeve 6 are improved by arranging the sealing rings on the inner side and the outer side of the second piston 5, so that high-pressure water flow is prevented from permeating into the area on the front side of the second piston 5 along the gaps between the second piston 5 and the propelling sleeve 6 and the third shaft section 303, and the forward thrust of the high-pressure water flow for pushing the second piston 5 is reduced; the sealing ring 36 is arranged on the outer side of the propelling sleeve 6 to improve the sealing effect between the propelling sleeve 6 and the outer sleeve 2, so that high-pressure water flow is prevented from permeating into the area on the front side of the propelling sleeve 6 along the gap between the propelling sleeve 6 and the outer sleeve 2, and the pressure of the high-pressure water flow is reduced; the sealing ring 37 is arranged at the position, which is contacted with the coal sample pipe 12, on the outer side of the coal sample pipe base 8, so that the sealing effect between the coal sample pipe base 8 and the coal sample pipe 12 is improved, and the gas contained in the coal sample pipe 12 is prevented from leaking along the gap between the coal sample pipe base 8 and the coal sample pipe 12, so that safety accidents are caused or the detection effect is influenced; the sealing ring 38 is arranged at the position, which is contacted with the coal sample pipe 12, on the outer side of the ball valve body 18, so that the sealing effect between the ball valve body 18 and the coal sample pipe 12 is improved, and the gas contained in the coal sample pipe 12 is prevented from leaking along the gap between the ball valve body 18 and the coal sample pipe 12, so that safety accidents are caused or the detection effect is influenced; the sealing ring 15 is arranged at the contact position of the ball valve body 18 and the ball valve gland 20, so that the sealing performance between the ball valve body 18 and the ball valve gland 20 is improved.

The working process of the utility model is as follows:

the sampler is used for drilling coal samples, the drill rod rotates to drive the sampler to feed for samplingThe ball valve is sealed in the process of sampling the coal sample, broken coal rock debris in a drill hole is prevented from entering the coal sample pipe to further influence the quality of the coal sample, and the high-pressure water flow drives the valve core 19 of the ball valve to be opened and closed, so that the purpose of sealing the coal sample is achieved. When the sampler works, firstly, all parts of the sampler are assembled according to the connection relation, and the assembled sampler is adjusted to an initial state, so that the first piston 4 is attached to the front end face of the drill rod joint 1 backwards, the second piston 5 is attached to the front end face of the first boss 21 backwards, the pushing sleeve 6 is attached to the front end face of the first piston 4 backwards, the pushing rack pipe 7 is attached to the front end face of the recommended sleeve backwards, the foremost end of the pushing rack 13 is meshed with the gear 14, and the position of the ball valve element 19 is adjusted, so that the ball valve element 19 connected with the gear 14 is in a closed position in the initial state, and the ball valve element 19 is ensured to be in the closed state in the initial state; after the assembly of the sampler and the adjustment of the initial state are completed, connecting a drill rod joint 1 of the sampler with a drill rod of a drilling machine, using the drilling machine as a power source for the working of the sampler, starting the drilling machine, carrying out rotary feeding work on the drilling machine and propelling the drill rod to move downwards along the deep hole, enabling the sampler connected on the drill rod to move downwards along the deep hole along with the drill rod, finally reaching the bottom of the deep hole, and then suspending the working of the drilling machine; after the sampler reaches the bottom of the deep hole, a water injection pump positioned outside the deep hole is started, the high-pressure water injection pump starts to supply high-pressure water flow, the high-pressure water injection pump is connected with the hollow area of the drill rod joint 1 through a pipeline, at the moment, the high-pressure water flow enters the cavity of the hollow area inside the drill rod joint 1 and flows along the first through hole 23 inside the first shaft section 301 of the mandrel 3, the high-pressure water flow enters the area between the drill rod joint 1 and the first piston 4 through the first through hole 23, the high-pressure water flow exerts forward thrust on the rear end surface of the first piston 4, so that the first piston 4 moves forward under the action of the high-pressure water flow in the rear area, as the propelling sleeve 6 is tightly attached to the first piston 4 in the initial state, the propelling sleeve 6 exerts forward thrust on the propelling sleeve 6 in the forward moving process, and the propelling sleeve 6 moves forward under the action of the first piston 4, meanwhile, the pushing rack pipe 7 is pushed forwards by the pushing sleeve 6 because the pushing rack pipe 7 is tightly attached to the front end surface of the pushing sleeve 6 backwardsForce acts, so that the pushing rack pipe 7 synchronously moves forwards under the action of the pushing sleeve 6, at the moment, the pushing rack 13 connected with the pushing rack pipe 7 also synchronously moves forwards along with the forward movement of the pushing rack pipe 7, the gear 14 rotates under the action of the pushing rack 13 due to the meshing of the pushing rack 13 and the gear 14, the ball valve core 19 rotates along with the rotation of the gear 14 due to the connection with the gear 14, and the ball valve core 19 is gradually switched from an initial closed state to an open state; at elapsed time t₁Thereafter, the first piston 4 moves forward by a distance s₁So that the gear 14 rotates 90 degrees under the action of the pushing rack 13, the ball valve core 19 is switched from the closed state to the open state, at this time, the first piston 4 is blocked by the first boss 21 between the second shaft section 302 and the third shaft section 303 on the mandrel 3 and does not move forward any more, and at this time, the ball valve core 19 continues to keep the open state; then the high-pressure water injection pump is closed, the drilling machine is started again, the drilling machine carries out rotary feeding work and drives the sampler to carry out rotary feeding through the drill rod, so that a drill bit on the sampler can crush the coal seam to move downwards through the rotary feeding, and at the moment, the coal sample to be drilled enters the coal sample pipe 12 after passing through a channel in the center of the drill bit; meanwhile, the first piston 4 passes through the opening of the second flow hole 25 on the side of the second shaft section 302, water flows into the second flow hole 25 through the opening, and flows to the opening of the second flow hole 25 on the front side of the first boss 21 along the second flow hole 25, at this time, the water contacts with the rear side of the second piston 5 and generates forward thrust on the second piston 5, the second piston 5 moves forward slowly under the action of the water flow, and during this time, the ball valve core 19 keeps an open state; after sampling is finished, the drilling machine is suspended, the high-pressure water injection pump is restarted, high-pressure water flow is continuously injected, the high-pressure water flow sequentially passes through the drill rod joint 1, the first flow through hole 23 and the second flow through hole 25 and enters the area on the rear side of the second piston 5, the high-pressure water flow generates forward thrust on the second piston 5, the second piston 5 moves forward under the action of the high-pressure water flow, when the second piston 5 moves forward and finally contacts with the front end of the propelling sleeve 6, at the moment, the propelling sleeve 6 is subjected to the forward thrust action of the second piston 5, the propelling sleeve 6 moves forward along with the forward movement of the second piston 5 and pushes the propelling sleeveWhen the sleeve 6 moves forwards, forward thrust is applied to the pushing rack pipe 7, the pushing rack pipe 7 moves forwards under the action of the forward thrust of the sleeve 6, the pushing rack 13 moves forwards synchronously under the action of the pushing rack pipe 7, the gear 14 meshed with the pushing rack 13 rotates under the action of the pushing rack 13, and the ball valve core 19 rotates synchronously under the action of the gear 14, so that the ball valve core 19 is gradually switched from an open state to a closed state; over time t₂Thereafter, the second piston 5 pushes the push sleeve 6, the push rack tube 7 and the push rack 13 forward by the distance s₂The gear 14 rotates 90 degrees under the action of the pushing rack 13, and the valve core 19 of the ball valve synchronously rotates along with the rotation of the gear 14 and is switched from an open state to a closed state, so that the coal sample is sealed in the coal sample pipe 12; stopping the high-pressure water injection pump to stop injecting high-pressure water flow, taking out the sampler from a deep hole through the withdrawing function of the drilling machine, unloading the taken-out sampler from a drill rod of the drilling machine, then sequentially unloading the drill bit, the outer sleeve 2, the drill rod joint 1 and the mandrel 3, and finally unloading the sample storage assembly integrally, wherein the coal sample stored in the sample storage assembly is stored in the coal sample pipe 12 in a sealing manner, before the coal sample is taken out of the coal sample pipe 12, desorbed gas needs to be extracted, at the moment, a thimble on a burette for measuring the gas needs to be pushed in from the rear side of a first through hole 29, then a sealing steel ball 9 is pushed forwards, the sealing steel ball 9 moves forwards and is compressed by a spring, at the moment, the first through hole 29 is communicated with the coal sample pipe 12 through a second screw hole 28 and a second through hole 30, and the gas desorbed from the coal sample in the coal sample pipe 12 sequentially passes through the second through hole 30, The second screw hole 28 and the first through hole 29 enter the measuring pipe, so that the desorbed gas amount of the coal sample is detected, the coal sample pipe 12 is opened after the gas extraction and measurement work is finished, the coal sample in the coal sample pipe 12 is placed in relevant experimental equipment for analysis and inspection, the total gas content of the coal sample is determined by combining the desorbed gas amount detected before, and the gas content of the coal bed where the coal sample is located is determined.

In the whole process, the sealing steel ball 9 can always seal the first through hole 29 between the first screw hole 27 and the second screw hole 28 under the action of the compression spring 10 and the compression screw 11, and in the process of withdrawing the sampler from the deep hole after the sampling working ball valve core 19 is closed, the coal sample pipe 12 is always in a closed pressure maintaining state, so that gas desorbed from the coal sample cannot leak.

Distance s mentioned in the above implementation₁、s₂And time t₁、t₂The pressure is preferably obtained by analyzing and calculating the conditions of ground tests and underground water injection pressure according to production requirements, and the pressure needs to be adjusted according to actual conditions in actual production.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the general inventive concept, and it is intended to cover all such changes and modifications as fall within the true spirit and scope of the invention.

Claims

1. The utility model provides a coal mine is with airtight pressurize sampler of deep hole, includes outer tube subassembly, dabber, deposits appearance subassembly and drive assembly, the outer tube subassembly is including the drill rod joint, outer tube and the drill bit that have hollow structure that connect gradually, set up the dabber in the outer tube subassembly and deposit the appearance subassembly, dabber one end with drill rod articulate, the other end with deposit the appearance subassembly and be connected, the dabber and deposit the appearance subassembly with set up drive assembly between the outer tube, set up the passageway that is used for the rivers business turn over in the dabber, the dabber divide into first shaft part, second shaft part and third shaft part triplex, its characterized in that: set up first boss between second shaft section and the third shaft section, drive assembly includes first piston, second piston, propulsion sleeve pipe and can control the drive mechanism who deposits the switching of appearance subassembly, sets up first piston between second shaft section and the outer tube, the propulsion sleeve pipe is established to dabber outside cover, first piston is leaned on in propulsion sleeve pipe's one end top, and the other end is protruding to the dabber and the top is leaned on drive mechanism, the third shaft section with set up the second piston between the propulsion sleeve pipe.

2. The deep-hole closed pressure-maintaining sampler for coal mines as set forth in claim 1, wherein: the first shaft section and the second shaft section of the mandrel are internally provided with first flow through holes, and the second shaft section of the mandrel is internally provided with second flow through holes.

3. The deep-hole closed pressure-maintaining sampler for coal mines as set forth in claim 2, wherein: and a second boss is arranged at the front end of the drill rod joint, and a gap is formed between the second boss and the opening of the second shaft section, which is positioned in the first flow through hole.

4. The deep-hole closed pressure-maintaining sampler for coal mines as set forth in any one of claims 1 to 3, wherein: the sample storage assembly comprises a coal sample tube base, a coal sample tube, a ball valve body, a ball valve core and a ball valve gland, one end of the coal sample tube base is connected with a core shaft, the other end of the coal sample tube is connected with the coal sample tube, the coal sample tube is connected with the ball valve body, the ball valve core is arranged in the ball valve body, and a gear capable of driving the ball valve core to open and close is arranged on the side face of the ball valve core.

5. The deep-hole closed pressure-maintaining sampler for coal mines as set forth in claim 4, wherein: the coal sample tube base is characterized in that a first screw hole and a second screw hole are respectively formed in two ends of the coal sample tube base, the first screw hole and the second screw hole are communicated through a first through hole, a compression screw, a compression spring and a sealing steel ball capable of being pushed by the compression spring to seal the first through hole are sequentially arranged in the second screw hole, and a second through hole is axially formed in the compression screw.

6. The deep-hole closed pressure-maintaining sampler for coal mines as set forth in claim 5, wherein: the transmission mechanism capable of controlling the sample storage assembly to be opened and closed comprises a pushing rack pipe and a pushing rack, the pushing rack pipe is sleeved on the outer side of the sample storage assembly, one end of the pushing rack pipe abuts against the pushing sleeve, the pushing rack pipe is connected with the pushing rack, and the pushing rack is meshed with the gear.

7. The deep-hole closed pressure-maintaining sampler for coal mines as set forth in claim 6, wherein: the utility model discloses a drill pipe joint, including drill pipe joint, first piston, second piston, push sleeve pipe, coal sample pipe base, ball valve body, drill rod joint, the position that the drill pipe joint outside contacted with the overcoat pipe sets up the sealing washer, the inboard and the outside of first piston all set up the sealing washer, the inboard and the outside of second piston all set up the sealing washer, the outside of propelling sleeve pipe sets up the sealing washer, the position that the coal sample pipe base outside contacted with the coal sample pipe sets up the sealing washer, the position that ball valve body and ball valve gland contacted sets up the sealing washer.