阅读说明：本技术 一种隧道有害气体超前钻孔随钻实时检测设备 (Tunnel harmful gas advanced drilling while-drilling real-time detection equipment ) 是由 邱鹏 苏培东 李有贵 于 2021-08-27 设计创作，主要内容包括：本发明公开了一种隧道有害气体超前钻孔随钻实时检测设备,其特征在于：包括套管、水气分离箱和气体检测系统,套管与水气分离箱相连通,气体检测系统设于水气分离箱的上方并与水器分离箱相连通。该设备可对超前钻孔内有害气体的浓度、成分与流量进行实时检测,再根据检测到的有害气体数据换算成有害气体逸出量,再将所得数据绘制得到相关曲线,用于预测隧道区段有害气体涌出量,为隧道设计、施工依据。本发明能够对钻孔有害气体进行实时检测,自动记录有害气体的浓度与逸出量,提高有害气体超前地质预测预报的精度。(The invention discloses a real-time detection device while drilling for advance drilling of harmful gas in a tunnel, which is characterized in that: the water-gas separator comprises a sleeve, a water-gas separation box and a gas detection system, wherein the sleeve is communicated with the water-gas separation box, and the gas detection system is arranged above the water-gas separation box and is communicated with a water separator. The device can detect the concentration, components and flow of harmful gas in the advanced borehole in real time, convert the detected harmful gas data into the harmful gas emission amount, and draw the obtained data to obtain a relevant curve for predicting the harmful gas emission amount in the tunnel section, so that the tunnel design and construction basis is provided. The invention can detect harmful gas in the drill hole in real time, automatically record the concentration and the escape amount of the harmful gas and improve the precision of advanced geological prediction of the harmful gas.)

1. The utility model provides a tunnel harmful gas advanced drilling is along with boring real-time detection equipment which characterized in that: the water-gas separator comprises a sleeve, a water-gas separation box and a gas detection system, wherein the sleeve is communicated with the water-gas separation box, and the gas detection system is arranged above the water-gas separation box and is communicated with the water separator box.

2. The real-time detection equipment while drilling for the harmful gas in the tunnel according to claim 1, characterized in that: the water-gas separation box is provided with a drill rod fixing mechanism, the drill rod fixing mechanism comprises a first fixing ring and a second fixing ring, a connecting rod is arranged between the first fixing ring and the second fixing ring, and the first fixing ring is connected with the sleeve.

3. The device for detecting harmful gas in a tunnel in advance during drilling in real time according to claim 2, wherein: the water-gas separation box is provided with a knuckle bearing and a first guide rail, a first fixing ring is arranged in an inner ring of the knuckle bearing, a second fixing ring is connected with a first sliding block, the first sliding block is arranged on the first guide rail, the first sliding block is in sliding connection with the first guide rail, the first sliding block is provided with a second guide rail, a second sliding block is arranged on the second guide rail, the second sliding block is in sliding connection with the second guide rail, and the second sliding block is in fixed connection with the second fixing ring.

4. The device for detecting harmful gas in a tunnel in advance during drilling in real time according to claim 3, wherein: the first guide rail is provided with a rack, the first sliding block is provided with a first motor, the first motor is connected with a driving gear, the first motor drives the driving gear to rotate, the driving gear is meshed with the rack,

5. the device for detecting harmful gas in a tunnel in advance during drilling in real time according to claim 4, wherein the device comprises: the first sliding block is provided with a supporting plate, the supporting plate is provided with a second motor and a screw rod, the screw rod is rotatably connected with the supporting plate, the second motor drives the screw rod to rotate, the screw rod is in threaded connection with a nut, a support rod is arranged between the nut and the second fixing ring, the support rod is rotatably connected with the nut, and the second fixing ring is rotatably connected with the support rod.

6. The real-time detection equipment while drilling for the harmful gas in the tunnel according to claim 1, characterized in that: the water-gas separation box is provided with a sealing mechanism which comprises a first slide rail, a first sealing plate, a second slide rail and a second sealing plate, the second sealing plate is arranged in the second slide rail which is connected with the second sealing plate in a sliding way, the second sealing plates are provided with limiting pieces, the limiting pieces of the adjacent second sealing plates are mutually clamped to realize the end-to-end connection between the adjacent second sealing plates, the second fixing ring is fixedly connected with one of the second sealing plates, the first sealing plate is arranged in the first sliding rail, the first sealing plate is connected with the first slide rail in a sliding way, the second slide rail is arranged on the first slide rail, the second sliding rail is connected with the first sliding rail in a sliding mode, the first sealing plate is provided with connecting pieces, and the connecting pieces adjacent to the first sealing pieces are clamped with one another to achieve end-to-end connection between the adjacent first sealing plates.

7. The real-time detection equipment while drilling for the harmful gas in the tunnel according to claim 1, characterized in that: the gas detection system comprises a harmful gas sensor, a flow sensor and a fixed shell, wherein the harmful gas sensor and the flow sensor are arranged in the fixed shell.

8. The device for detecting harmful gas in a tunnel in advance during drilling in real time according to claim 7, wherein: the connecting pipe is arranged between the fixed shell and the water-gas separation box to realize communication between the fixed shell and the water-device separation box, the connecting pipe is provided with a connecting seat, the connecting seat is provided with a connecting groove, the water-gas separation box is clamped in the connecting groove, the water-gas separation box is provided with a positioning column, the connecting seat is provided with a positioning hole, the positioning column is clamped in the positioning hole, the positioning column is provided with a fixing groove, the connecting seat is provided with a sliding groove, a spring and a fixing block are arranged in the sliding groove, the fixing block is in sliding connection with the sliding groove, and the spring drives the fixing block to be clamped in the fixing groove.

9. The device for detecting harmful gas in a tunnel in advance during drilling in real time according to claim 8, wherein: the connecting seat is provided with a sealing ring.

10. The device for detecting harmful gas in a tunnel in advance during drilling in real time according to claim 8, wherein: the connecting seat is in threaded connection with the connecting pipe, the connecting pipe is provided with a limiting ring, and the limiting ring limits the connecting seat.

Technical Field

The invention belongs to the technical field of tunnel construction, and particularly relates to a device for detecting harmful gas in advance in a tunnel during drilling in real time.

Background

Harmful gas has great threat to tunnel engineering (such as CH)₄、H₂Initiated blasting, CO, H₂S、SO₂Induced poisoning of people, CO₂Triggered asphyxia). In the process of tunnel construction, harmful gas often escapes or gushes out from a tunnel face or an unsupported tunnel wall, and when the gas in the tunnel reaches a certain concentration, a series of disasters can be caused, the personal safety of operating personnel is threatened, the construction period is delayed, and even huge engineering accidents are caused.

In order to reduce the risk of harmful gas in tunnel construction, advanced geological prediction of harmful gas in a tunnel is emphasized in the industry, the conventional advanced geological prediction method of the harmful gas in the tunnel mainly comprises an advanced geological drilling method, and the following defects mainly exist: 1. due to the limitation of detection equipment, the detection mode is mainly that the relevant detection of harmful gas is carried out after the advance geological drilling is finished, and the accuracy of the detection result is not high; 2. under the conditions of hole collapse, negative pressure in the hole, a large amount of water gushing in the hole and the like, harmful gas cannot be detected; 3. the detection personnel are required to continuously track and detect, the automation degree is low, and the operation is complex.

Disclosure of Invention

The invention aims to solve the technical problems in the prior art, and provides the tunnel harmful gas advanced drilling while-drilling real-time detection equipment which can detect harmful gas in a drilled hole in real time, automatically record the concentration and the escape amount of the harmful gas and improve the precision of advanced geological prediction and forecast of the harmful gas.

In order to solve the technical problems, the invention adopts the following technical scheme:

the utility model provides a tunnel harmful gas advanced drilling is along with boring real-time detection equipment which characterized in that: the water-gas separator comprises a sleeve, a water-gas separation box and a gas detection system, wherein the sleeve is communicated with the water-gas separation box, and the gas detection system is arranged above the water-gas separation box and is communicated with a water separator. The device can detect the concentration, components and flow of harmful gas in the advanced borehole in real time, convert the detected harmful gas data into the harmful gas emission amount, and draw the obtained data to obtain a relevant curve for predicting the harmful gas emission amount in the tunnel section, so that the tunnel design and construction basis is provided. The water-gas separation box is arranged in front of the drilling machine, the drill rod penetrates through the water-gas separation box and the sleeve for drilling, water and harmful gas in the drill hole are led into the water-gas separation box by the sleeve, the water and the harmful gas entering the water-gas separation box are separated under the action of gravity, the gas moves to the upper part of the water-gas separation box and moves to the gas detection system through the connecting pipe, and the water flows out of the water outlet after reaching the water level of the water outlet, so that the purpose of water-gas separation is achieved.

Further, the water-gas separation box is equipped with drilling rod fixed establishment, and drilling rod fixed establishment includes the solid fixed ring of first solid fixed ring and second, is equipped with the connecting rod between the solid fixed ring of first solid fixed ring and second, and first solid fixed ring is connected with the sleeve pipe. The drilling rod passes solid fixed ring of second, first solid fixed ring and sleeve pipe respectively and drills, and the solid fixed ring of first solid fixed ring and second sets up, can guarantee the connection effect of drilling rod and aqueous vapor separator box, avoids the drilling rod to damage the condition of aqueous vapor separator box, and the solid fixed ring of first solid fixed ring and second can play the effect of supporting the drilling rod simultaneously, guarantees the drilling precision of drilling rod. The connecting rod is arranged in the first fixing ring and the second fixing ring to be connected, so that the first fixing ring and the second fixing ring can be adjusted simultaneously when the drill rod is adjusted, adjustment is not required to be achieved through the transmission force of the drill rod, adjustment can be facilitated, and the drill rod is prevented from being clamped on the first fixing ring and the second fixing ring.

Furthermore, the water-gas separation box is provided with a joint bearing and a first guide rail, a first fixing ring is arranged in an inner ring of the joint bearing, a second fixing ring is connected with a first sliding block, the first sliding block is arranged on the first guide rail and is in sliding connection with the first guide rail, the first sliding block is provided with a second guide rail, a second sliding block is arranged on the second guide rail and is in sliding connection with the second guide rail, and the second sliding block is fixedly connected with the second fixing ring. In the process of rock stratum drilling, due to the fact that rock stratum lithology and production are different, a drill rod is prone to shifting in the drilling process, and the angle of the drill rod needs to be corrected. Joint bearing can provide an angle modulation on a large scale, cooperates first guide rail and second guide rail, has realized the angle modulation of drilling rod in the water gas separator box, and it is convenient to adjust simultaneously, adjusts effectually, has guaranteed the precision of drilling rod drilling in-process, has guaranteed the degree of accuracy of drilling, can do benefit to harmful gas's real-time detection simultaneously. First slide rail and second slide rail play the guide effect, guarantee the solid fixed ring's of second removal precision, improve the solid fixed ring's of second removal effect, and friction when first slider and second slider can reduce the solid fixed ring of second and remove makes things convenient for the solid fixed ring's of second removal to adjust.

Further, first guide rail is equipped with the rack, first slider is equipped with first motor, first motor is connected with drive gear, first motor drive gear rotates, drive gear meshes with the rack mutually, through first motor, the cooperation of gear and rack, the solid fixed ring angle modulation of second on the horizontal direction has been realized, it is convenient to adjust, it is effectual to adjust, the regulating distance is controllable simultaneously, through the turned angle of controlling first motor, the solid fixed ring stroke of accurate control second on first guide rail, make the angle modulation of drilling rod more accurate, compare in artifical regulation labour saving and time saving more, and adjust the effect better.

Further, the first slider is provided with a supporting plate, the supporting plate is provided with a second motor and a lead screw, the lead screw is rotatably connected with the supporting plate, the second motor drives the lead screw to rotate, the lead screw is in threaded connection with a nut, a support rod is arranged between the nut and a second fixing ring, the support rod is rotatably connected with the nut, and the second fixing ring is rotatably connected with the support rod. The vertical direction of the second fixing ring is adjusted, and the second fixing ring can be adjusted more conveniently in the vertical direction through the support rod and the nut. The second motor drives the screw rod to rotate, so that the nut on the screw rod moves transversely, and the nut moves transversely, and drives the second fixing ring to lift on the second slide rail through the support rod. The cooperation of second motor, lead screw and nut has also realized the solid fixed ring vertical direction's of second accurate control, guarantees with the solid fixed ring's of second removal effect. First motor and the cooperation of second motor for the solid fixed ring's of second adjustment can all be externally direct control, on the one hand does not need artifical the regulation, control regulation precision is high, regulating effect is good, it is another convenient, the solid fixed ring of second can control in the water-gas separation case and adjusts by oneself, then made things convenient for the sealed of water-gas separation case, if artifical the regulation, both probably because the water-gas separation case narrowly leads to being difficult to adjust thereby the solid fixed ring's of second regulation precision is poor, probably again because frequently open the water-gas separation case and adjust, lead to the sealed effect of water-gas separation case poor, thereby influence the degree of accuracy that harmful gas detected, produce the interference to the testing result. The first motor and the second motor both adopt plastic package structures, and the sealing performance and the waterproof performance of the motors are guaranteed.

Further, the water-gas separation box is provided with a sealing mechanism, the sealing mechanism comprises a first slide rail, a first sealing plate, a second slide rail and a second sealing plate, the second sealing plate is arranged in the second slide rail, the second slide rail is connected with the second sealing plate in a sliding mode, the second sealing plate is provided with a limiting piece, the limiting pieces of the adjacent second sealing plate are mutually clamped to realize end-to-end connection between the adjacent second sealing plates, the second fixing ring is fixedly connected with one of the second sealing plates, the first sealing plate is arranged in the first slide rail, the first sealing plate is connected with the first slide rail in a sliding mode, the second slide rail is arranged on the first slide rail, the second slide rail is connected with the first slide rail in a sliding mode, the first sealing plate is provided with a connecting piece, and the mutual connecting pieces of the adjacent first sealing plates are mutually clamped to realize end-to-end connection between the adjacent first sealing plates. The sealing mechanism is used for sealing between the second fixing ring and the water-gas separation box, and water in the water-gas separation box can not leak while the second fixing ring is movably adjusted. The solid fixed ring level of thing second that first closing plate and first slide rail realized is to the sealed when removing, the first closing plate of polylith end to end links up and realizes connecting sealedly, it then can improve sealed effect to set up the sealing strip between the connection piece of first closing plate, the solid fixed ring level of second is when removing, the first closing plate of one side is folding, the first closing plate of opposite side is stretched to realize removing sealedly, the second closing plate adopts the principle the same with first closing plate to seal, sealed when guaranteeing the solid fixed ring vertical migration of second. Thereby because the second is fixed to rotate around joint bearing and realize the solid fixed ring's of second removal, so first closing plate and second closing plate are whole to be the sphere form, can guarantee the good function of first closing plate and second closing plate, guarantee sealed effect, guarantee gaseous detection effect. The sealing mechanism is passively adjusted, and is matched with the second fixing ring which actively moves, so that the matching effect is good, and the sealing effect is good.

Further, the gas detection system comprises a harmful gas sensor, a flow sensor and a fixed shell, wherein the harmful gas sensor and the flow sensor are arranged in the fixed shell. The harmful gas sensor is provided with a plurality of harmful gas sensor groups which can be used for detecting CH₄、CO、H₂S、SO₂、CO₂、H₂、NO₂The gas detection system also comprises a plurality of algorithms such as automatic zero calibration, zero drift, temperature drift, sensor linearity and the like, so that the stability of the system and the accuracy of data are ensured; the Bluetooth module carried by the harmful gas detection system can be connected with devices such as a mobile phone computer and the like, and relevant data of harmful gas can be checked on the mobile phone and the computer in real time; the system can record the data of harmful gas flow, components, concentration and the like passing through the automatic detection system, calculate the real-time escape amount according to the recorded data and further draw a relevant curve.

Further, be equipped with the connecting pipe between set casing and the aqueous vapor separator box in order to realize the intercommunication of set casing and hydrophone separator box, the connecting pipe is equipped with the connecting seat, the connecting seat is equipped with the spread groove, in aqueous vapor separator box card and the spread groove, the aqueous vapor separator box is equipped with the reference column, the connecting seat is equipped with the locating hole, the reference column card is in the locating hole, the reference column is equipped with the fixed slot, the positioning seat is equipped with the spout, be equipped with spring and fixed block in the spout, fixed block and spout sliding connection, spring drive fixed block card is in the fixed slot. Realize the high-speed joint location through the reference column between set casing and the connecting pipe, quick installation, simple to operate, location effect is good, takes out the convenience simultaneously. The spread groove plays and connects the fixed action, makes things convenient for the location of set casing on the connecting seat, guarantees the connection effect between connecting seat and the set casing.

Further, the connecting seat is equipped with the sealing washer, and the sealing washer can avoid gaseous junction from connecting seat and set casing to spill over, guarantees the accuracy that gaseous detected.

Further, the connecting seat is in threaded connection with a connecting pipe, the connecting pipe is provided with a limiting ring, and the limiting ring limits the connecting seat. . The connecting seat shell is detached, the fixing shells with different sizes can be conveniently arranged, replacement and replacement are convenient, the limiting ring plays a role in limiting the connecting seat, and the connecting effect of the connecting seat and the connecting pipe is guaranteed.

Due to the adoption of the technical scheme, the invention has the following beneficial effects:

when the device is used, the first motor and the second motor are started to adjust the position of the second fixing ring, then the drill rod penetrates through the first fixing ring and the second fixing ring, after the drill rod starts drilling, gas and liquid overflowing from the drill hole flow into the water-gas separation box through the sleeve, and after the water-gas separation box separates water and gas, the gas is led to the harmful gas detection system for detection, and real-time detection is carried out. The tunnel harmful gas advanced drilling while-drilling real-time detection equipment provided by the invention is simple to operate and high in automation degree, realizes real-time detection of drilling harmful gas, improves the precision of advanced geological prediction and forecast of harmful gas, and improves the safety of tunnel construction.

Drawings

The invention will be further described with reference to the accompanying drawings in which:

FIG. 1 is a schematic structural diagram of a device for detecting harmful gas in a tunnel in advance during drilling in real time;

FIG. 2 is a schematic structural diagram according to a first embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a second embodiment of the present invention;

FIG. 4 is a schematic view of the connection of the first retaining ring and the second retaining ring of the present invention;

FIG. 5 is a schematic view of the connection between the first slider and the first rail according to the present invention;

FIG. 6 is a schematic view of a connecting socket according to the present invention;

FIG. 7 is a schematic structural view of a connecting tube according to the present invention;

FIG. 8 is a schematic structural view of a fixing case according to the present invention;

FIG. 9 is a schematic view of the fixing block disposed in the connecting seat according to the present invention;

FIG. 10 is a schematic view of the connection between the second sealing plate and the first sliding rail according to the present invention;

fig. 11 is a schematic structural view illustrating a connection between a second sealing plate and a second slide rail according to the present invention.

In the drawings, 1-sleeve; 2-a water-gas separation tank; 3-a gas detection system; 4-a first retaining ring; 5-a second retaining ring; 6-connecting rod; 7-knuckle bearing; 8-a first guide rail; 9-a first slider; 10-a second guide rail; 11-a second slide; 12-a rack; 13-a first electric machine; 14-a drive gear; 15-a support plate; 16-a second electric machine; 17-a screw rod; 18-a nut; 19-a strut; 21-a first slide rail; 22-a first sealing plate; 23-a second slide rail; 24-a second sealing plate; 25-limiting piece; 26-connecting pieces; 27-a harmful gas sensor; 28-a flow sensor; 29-a stationary shell; 30-a connecting pipe; 31-a connecting seat; 32-a connecting groove; 33-a positioning column; 34-positioning holes; 35-a fixed groove; 36-a chute; 37-a spring; 38-fixed block; 39-sealing ring; 40-a spacing ring; 41-drill rod.

Detailed Description

As shown in fig. 1 and fig. 2, a first embodiment of the device for detecting harmful gas in a tunnel ahead drilling while drilling in real time according to the present invention includes a casing 1, a water-gas separation tank 2, and a gas detection system 3, where the casing 1 is communicated with the water-gas separation tank 2, and the gas detection system 3 is disposed above the water-gas separation tank 2 and is communicated with a water separator. The device can detect the concentration, components and flow of harmful gas in the advanced borehole in real time, convert the detected harmful gas data into the harmful gas emission amount, and draw the obtained data to obtain a relevant curve for predicting the harmful gas emission amount in the tunnel section, so that the tunnel design and construction basis is provided. The water-gas separation box 2 is arranged in front of a drilling machine, a drill rod penetrates through the water-gas separation box 2 and a sleeve 1 to drill a hole, the sleeve 1 guides water and harmful gas in the drilled hole into the water-gas separation box 2, the water and the harmful gas entering the water-gas separation box 2 are separated under the action of gravity, the gas moves towards the upper part of the water-gas separation box 2 and is transported to the gas detection system 3 through a connecting pipe, and the water flows out from a water outlet after reaching the water level of the water outlet, so that the purpose of water-gas separation is achieved. Embodiment one is used for gas detection, and the drilling rod angle is not adjustable.

As shown in fig. 3 to 11, in a second embodiment of the present invention, based on the first embodiment, a water-gas separation tank 2 is modified, the water-gas separation tank 2 is provided with a drill rod fixing mechanism, the drill rod fixing mechanism includes a first fixing ring 4 and a second fixing ring 5, a connecting rod 6 is arranged between the first fixing ring 4 and the second fixing ring 5, and the first fixing ring 4 is connected with a casing 1. The drilling rod passes solid fixed ring 5 of second, first solid fixed ring 4 and sleeve pipe 1 respectively and drills, and the solid fixed ring 5's of first solid fixed ring 4 and second setting can guarantee the connected effect of drilling rod and aqueous vapor separator box 2, avoids the drilling rod to damage the condition of aqueous vapor separator box 2, and the solid fixed ring 5 of first solid fixed ring 4 and second can play the effect of supporting the drilling rod simultaneously, guarantees the drilling precision of drilling rod. Set up connecting rod 6 in first solid fixed ring 4 and the solid fixed ring 5 of second and connect for can guarantee when the drilling rod is adjusted that first solid fixed ring 4 and the solid fixed ring 5 of second adjust simultaneously, need not realize adjusting through drilling rod transmission power, also can conveniently adjust, avoid the drilling rod chucking on first solid fixed ring 4 and the solid fixed ring 5 of second.

The water-gas separation box 2 is provided with a joint bearing 7 and a first guide rail 8, a first fixing ring 4 is arranged in an inner ring of the joint bearing 7, a second fixing ring 5 is connected with a first sliding block 9, the first sliding block 9 is arranged on the first guide rail 8, the first sliding block 9 is in sliding connection with the first guide rail 8, the first sliding block 9 is provided with a second guide rail 10, a second sliding block 11 is arranged on the second guide rail 10, the second sliding block 11 is in sliding connection with the second guide rail 10, and the second sliding block 11 is fixedly connected with the second fixing ring 5. In the process of rock stratum drilling, due to the fact that rock stratum lithology and production are different, a drill rod is prone to shifting in the drilling process, and the angle of the drill rod needs to be corrected. Joint bearing 7 can provide an angle modulation on a large scale, and cooperation first guide rail 8 and second guide rail 10 have realized the angle modulation of drilling rod in aqueous vapor separator box 2, and it is convenient to adjust simultaneously, and it is effectual to adjust, has guaranteed the precision of drilling rod drilling in-process, has guaranteed the degree of accuracy of drilling, can do benefit to harmful gas's real-time detection simultaneously. First slide rail and second slide rail play the guide effect, guarantee the solid fixed ring 5's of second removal precision, improve the solid fixed ring 5's of second removal effect, and first slider 9 and second slider 11 can reduce the solid fixed ring 5 of second friction when removing, make things convenient for the solid fixed ring 5's of second removal to adjust.

First guide rail 8 is equipped with rack 12, first slider 9 is equipped with first motor 13, first motor 13 is connected with drive gear 14, first motor 13 drive gear 14 rotates, drive gear 14 meshes with rack 12 mutually, through first motor 13, the cooperation of gear and rack 12, the solid fixed ring 5 of second angle modulation on the horizontal direction has been realized, it is convenient to adjust, adjust effectually, the regulating distance is controllable simultaneously, through the turned angle of controlling first motor 13, the solid fixed ring 5 of accurate control second stroke on first guide rail 8, make the angle modulation of drilling rod more accurate, compare in artifical regulation labour saving and time saving more, and the regulating effect is better.

The first sliding block 9 is provided with a supporting plate 15, the supporting plate 15 is provided with a second motor 16 and a screw rod 17, the screw rod 17 is rotatably connected with the supporting plate 15, the second motor 16 drives the screw rod 17 to rotate, the screw rod 17 is in threaded connection with a nut 18, a support rod 19 is arranged between the nut 18 and the second fixing ring 5, the support rod 19 is rotatably connected with the nut 18, and the second fixing ring 5 is rotatably connected with the support rod 19. The vertical adjustment of the second fixing ring 5 is realized by the stay bar 19 and the nut 18, so that the vertical adjustment of the second fixing ring 5 is more convenient. The second motor 16 drives the screw rod 17 to rotate, so that the nut 18 on the screw rod 17 moves transversely, and the nut 18 moves transversely, so that the second fixing ring 5 is driven by the support rod 19 to lift on the second slide rail. The cooperation of the second motor 16, the screw rod 17 and the nut 18 also realizes the accurate control of the vertical direction of the second fixing ring 5, and ensures the moving effect of the second fixing ring 5. First motor 13 and the cooperation of second motor 16, make the solid fixed ring 5's of second adjustment all can externally direct control, on the one hand do not need artifical the regulation, control adjustment precision is high, it is effectual to adjust, another convenient, solid fixed ring 5 of second can control in aqueous vapor separator box 2 and adjust by oneself, then made things convenient for the sealed of aqueous vapor separator box 2, if artifical the regulation, both probably because aqueous vapor separator box 2 narrowly leads to being difficult to adjust thereby the solid fixed ring 5's of second regulation precision is poor, probably again because frequently open aqueous vapor separator box 2 and adjust, lead to aqueous vapor separator box 2's sealed effect poor, thereby influence the degree of accuracy that harmful gas detected, produce the interference to the testing result. The first motor 13 and the second motor 16 both adopt plastic package structures, and the sealing performance and the waterproof performance of the motors are guaranteed.

The water-gas separation box 2 is provided with a sealing mechanism which comprises a first slide rail 21, a first sealing plate 22, a second slide rail 23 and a second sealing plate 24, the second sealing plate 24 is arranged in the second slide rail 23, the second slide rail 23 is connected with the second sealing plate 24 in a sliding manner, the second sealing plate 24 is provided with a limiting piece 25, the limiting pieces 25 of the adjacent second sealing plates 24 are mutually clamped to realize the end-to-end connection between the adjacent second sealing plates 24, the second fixing ring 5 is fixedly connected with one of the second sealing plates 24, the first sealing plate 22 is arranged in the first slide rail 21, first closing plate 22 and first slide rail 21 sliding connection, second slide rail 23 is located on first slide rail 21, second slide rail 23 and first slide rail 21 sliding connection, and first closing plate 22 is equipped with connection piece 26, and the mutual block of connection piece 26 of adjacent first gasket is in order to realize the end to end connection between the adjacent first closing plate 22. The sealing mechanism is used for sealing between the second fixing ring 5 and the water-gas separation box 2, and water in the water-gas separation box 2 can not leak out while the second fixing ring 5 is movably adjusted. First closing plate 22 and the solid fixed ring 5 level of thing second that first slide rail 21 realized are sealed when removing, the first closing plate 22 end to end of polylith links up and realizes connecting sealedly, it then can improve sealed effect to set up the sealing strip between the connection piece 26 of first closing plate 22, the solid fixed ring 5 level of second is when removing, the first closing plate 22 of one side is folding, the first closing plate 22 of opposite side is stretched, thereby realize moving sealedly, second closing plate 24 adopts the principle the same with first closing plate 22 sealed, guarantee the sealed when the solid fixed ring 5 vertical migration of second. Because the second is fixed the solid fixed ring 5 and is rotated round joint bearing 7 thereby to realize the solid fixed ring 5's of second removal, so first closing plate 22 and second closing plate 24 are whole to be the sphere form, can guarantee the good function of first closing plate 22 and second closing plate 24, guarantee sealed effect, guarantee gaseous detection effect. The sealing mechanism is passively adjusted, and is matched with the second fixing ring 5 which actively moves, so that the matching effect is good, and the sealing effect is good.

The gas detection system 3 includes a harmful gas sensor 27, a flow sensor 28, and a fixed case 29, and both the harmful gas sensor 27 and the flow sensor 28 are provided in the fixed case 29. The harmful gas sensor 27 is provided in plurality to form a group of harmful gas sensors 27, and the group of harmful gas sensors 27 may be for CH₄、CO、H₂S、SO₂、CO₂、H₂、NO₂The concentration of the harmful gas in the common tunnel is monitored in real time, meanwhile, a sensor interface is reserved, different harmful gas sensors 27 can be replaced according to different harmful gas environments in the tunnel, the gas detection system 3 further comprises various algorithms such as automatic zero calibration, zero drift, temperature drift and sensor linearity, and the stability of the system and the accuracy of data are guaranteed; the Bluetooth module carried by the harmful gas detection system 3 can be connected with devices such as a mobile phone and a computer, and relevant data of harmful gas can be checked on the mobile phone and the computer in real time; the system can record the data of harmful gas flow, components, concentration and the like passing through the automatic detection system, calculate the real-time escape amount according to the recorded data and further draw a relevant curve.

Be equipped with connecting pipe 30 between stationary casing 29 and the aqueous vapor separator 2 in order to realize the intercommunication of stationary casing 29 and hydrophone separator box, connecting pipe 30 is equipped with connecting seat 31, connecting seat 31 is equipped with connecting groove 32, aqueous vapor separator box 2 blocks and in the connecting groove 32, aqueous vapor separator box 2 is equipped with reference column 33, connecting seat 31 is equipped with locating hole 34, reference column 33 blocks in locating hole 34, reference column 33 is equipped with fixed slot 35, the connecting seat is equipped with spout 36, be equipped with spring 37 and fixed block 38 in the spout 36, fixed block 38 and spout 36 sliding connection, spring 37 drive fixed block 38 blocks in fixed slot 35. Realize the high-speed joint location through reference column 33 between set casing 29 and the connecting pipe 30, install fast, simple to operate, the location is effectual, takes out the convenience simultaneously. The connecting groove 32 plays a role in connecting and fixing, facilitates the positioning of the fixing shell 29 on the connecting seat 31, and ensures the connecting effect between the connecting seat 31 and the fixing shell 29.

The connecting seat 31 is provided with a sealing ring 39, and the sealing ring 39 can prevent gas from overflowing from the connecting part of the connecting seat 31 and the fixed shell 29, so that the accuracy of gas detection is ensured.

The connecting base 31 is in threaded connection with the connecting pipe 30, the connecting pipe 30 is provided with a limiting ring 40, and the limiting ring 40 limits the connecting base 31. The shell of the connecting seat 31 is detached, the fixing shells 29 with different sizes can be conveniently arranged, the replacement is convenient, meanwhile, the limiting ring 40 plays a role in limiting the connecting seat 31, and the connecting effect of the connecting seat 31 and the connecting pipe 30 is guaranteed.

When the device is used, the first motor 13 and the second motor 16 are started to adjust the position of the second fixing ring 5, then the drill rod penetrates through the first fixing ring 4 and the second fixing ring 5, after the drill rod is started to drill, gas and liquid overflowing from the drill hole flow into the water-gas separation box 2 through the sleeve 1, and after water and gas are separated by the water-gas separation box 2, the gas is led to the harmful gas detection system 3 for detection and real-time detection. The tunnel harmful gas advanced drilling while-drilling real-time detection equipment provided by the invention is simple to operate and high in automation degree, realizes real-time detection of drilling harmful gas, improves the precision of advanced geological prediction and forecast of harmful gas, and improves the safety of tunnel construction.

The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications made based on the present invention to solve the same technical problems and achieve the same technical effects are within the scope of the present invention.