Movable tunnel variable-capacity ventilation bin and ventilation method

Abstract

The invention discloses a movable tunnel variable-capacity ventilation bin. Ports of the ventilation bin are sealed through movable sealing plates respectively. The movable sealing plate comprises a tire type trolley and a sealing plate assembly, and the two ends of the lower portion of the tire type trolley are supported on the bottom face of the parallel pilot tunnel through tire devices respectively. The sealing plate assembly comprises an upper arc-shaped top frame, a central cross rib frame, an arc-shaped side frame and a bottom frame, a horizontal telescopic oil cylinder is arranged in the middle of the arc-shaped side frame, and the horizontal telescopic guide mechanisms are arranged on the upper side and the lower side of the horizontal telescopic oil cylinder respectively; and two sides of the sealing plate assembly are respectively covered with canvas. The ventilation method comprises the steps that (1) the movable sealing plate is moved to seal the movable tunnel variable-capacity ventilation bin, and fresh air is transmitted into a tunnel face in a relay mode through the draught fan; and (2) a new ventilation bin is formed after the movable sealing plate moves. The ventilation distance is greatly prolonged, the ventilation efficiency is obviously improved, the air quality in the tunnel is obviously improved, and the safety of constructors and construction equipment in the tunnel is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction, and more particularly to a method for converting a local parallel guide tunnel in tunnel construction into a movable ventilation silo with variable capacity and a ventilation method. Background Art

[0002] During tunnel construction, a parallel pilot tunnel must be excavated parallel to the tunnel as an escape route. The tunnel and the parallel pilot tunnel are connected by multiple spaced horizontal passages. In the event of a landslide or fire, it is convenient for construction workers to retreat and rescue workers to enter the tunnel for rescue.

[0003] Tunnel ventilation systems ensure safe construction and operation. Fans deliver fresh air into the tunnel, dispersing dust and smoke while also providing cooling, ensuring the safety of workers and the proper operation of machinery. Traditional ducted ventilation often relies on auxiliary tunnels to increase the working surface, enabling shorter tunneling times. When roadway ventilation is unavailable, single-ended, pressure-driven, long-distance ventilation is often limited by the length and clearance requirements of the auxiliary tunnels, making it inadequate for tunnel environmental requirements. In these situations, to improve ventilation efficiency and air quality within the tunnel, silo ventilation is often employed. This involves separating parallel guide tunnels near the tunnel construction area into two layers using steel sections and steel plates. The upper layer is sealed at both ends to serve as a silo, while the lower layer serves as a passage for personnel and supplies. Fans outside the tunnel deliver fresh air to the silo via ducts. Fans inside the silo and ducts outside the silo then deliver the fresh air through transverse passages to the working face. The construction of the wind silo requires a large amount of steel. As the tunnel construction progresses, the location of the wind silo also needs to be moved, and a new wind silo needs to be rebuilt. The ventilation cost increases, thereby increasing the tunnel construction cost. Summary of the Invention

[0004] The purpose of the present invention is to provide a mobile tunnel variable volume ventilation chamber and ventilation method, so as to reduce ventilation costs and improve tunnel construction efficiency.

[0005] The present invention is achieved through the following technical solutions:

[0006] The cam is secured to the side of the vehicle when it is in a position to move relative to the vehicle body, and the cam is secured to the side of the vehicle body when it is in a position to move relative to the vehicle body when it is in a position to move relative to the vehicle body. Horizontal telescopic oil cylinder, one end of the piston rod of the horizontal telescopic oil cylinder is hinged to the hinge seat in the middle of the arc rod fixed on the outside of the arc side frame, and the other end of the horizontal telescopic oil cylinder is fixed to the middle of the vertical rod on the inside of the arc side frame; the horizontal telescopic guide mechanism is respectively arranged on the upper and lower sides of the horizontal telescopic oil cylinder; the cross rib end of the central cross rib frame is respectively welded to the middle of the lower side of the upper arc top frame, the middle of the lower connecting cross bar of the central cross rib frame and the middle of the vertical rods of the two arc side frames; the lower connecting cross bar, the two The lower part of the vertical rod on the inner side of the curved side frame, the lower upright rod welded to the lower side of the middle part of the lower connecting horizontal rod, and the bottom rod with both ends welded to the lower end of the lower upright rod are welded to form a bottom frame; the side surface of the upper curved top frame, the side surface of the central cross rib frame and the side surface of the bottom frame are respectively welded with a mask made of a steel plate with a thickness of 2 to 3 mm, and the side surfaces of the curved side frames are respectively covered with canvas, and the outer edge of the canvas extends outward of the curved rod of the curved side frame; the two ends of the oblique support rod are respectively welded to the middle part of both sides of the vertical rod of the curved side frame and the middle part of the lower horizontal rod.

[0007] The purpose of the present invention can also be achieved in one step through the following technical measures.

[0008] Furthermore, the bottom frame is provided with one or two opening and closing doors.

[0009] Furthermore, the horizontal telescopic guide mechanism includes a movable tube and a fixed tube, one end of the movable tube is welded and fixed to the upper and lower parts of the arc-shaped rod of the arc-shaped side frame, one end of the fixed tube is welded and fixed to the upper and lower parts of the vertical rod of the arc-shaped side frame, and the other end of the movable tube is inserted into the other end of the corresponding fixed tube.

[0010] Furthermore, the tire device includes a wheel frame, a tire, a driving mechanism, a wheel frame rotating mechanism, a wheel frame lifting mechanism and an electromagnetic brake. The tire is fixed on the middle part of the support shaft in the wheel frame, and the two ends of the support shaft are supported on both sides of the wheel frame through support bearings respectively; the driving mechanism is fixed on the outside of the wheel frame, the wheel frame rotating mechanism is arranged on the top of the wheel frame, the wheel frame lifting mechanism is located between the upper side of the wheel frame rotating mechanism and the lower side of the two ends of the lower cross bar, the electromagnetic brake is arranged on one end of the wheel frame, and the brake shoe at one end of the electromagnetic brake is adjacent to one side of the tire.

[0011] Furthermore, the driving mechanism includes a driving motor and a driving reducer, one end of the driving motor is connected to the driving reducer, one side of the driving reducer is vertically fixed on one side of the wheel frame, and the spline output shaft of the driving reducer is inserted into the spline hole at one end of the support shaft.

[0012] Furthermore, the wheel frame rotation mechanism includes a rotary motor reducer assembly, a vertical spindle, a stepped housing and two rotary bearings. The lower side of the stepped housing is fixed on the top surface of the wheel frame, the bottom of the rotary motor reducer assembly is fixed on the upper side of one end of the bottom shell of the stepped housing, the output shaft of the rotary motor reducer assembly extends into one end of the bottom shell, the small gear is fixed on the output shaft of the rotary motor reducer assembly, the lower end of the vertical spindle extends into the middle of the bottom shell, and the lower end of the vertical spindle is fixed on the top center of the wheel frame; the large gear located in the middle of the bottom shell is fixed on the lower end of the vertical spindle, the small gear is engaged with the large gear, and the upper part of the vertical spindle is supported in the upper shell of the stepped housing by two rotary bearings, and the upper ends of the vertical spindle are respectively connected with the lower ends of the wheel frame lifting mechanism at one end of the lower cross bar.

[0013] Furthermore, the wheel frame lifting mechanism includes a vertical support shell, an upper cover, a lifting cylinder, a ball head seat, a ball head cover, a flange and two guide strips. One side of the circular tubular vertical support shell is welded and fixed to the two ends of the lower cross bar, and the top of the vertical shaft extends into the vertical support shell. The vertically arranged guide strips are symmetrically fixed on the inner wall of the vertical support shell. The flange is positioned and fixed on the top of the vertical shaft. The guide grooves symmetrically arranged on the outer edge of the flange are respectively embedded in the corresponding guide strips. The upper cover is fixed on the upper end port of the vertical support shell. The lifting cylinder is vertically fixed to the upper cover. The piston rod of the lifting cylinder passes downward through the upper cover and extends into the vertical support shell. The ball head seat is positioned and fixed on the flange. The ball head fixed at the lower end of the piston rod rests on the ball head seat. The ball head cover sleeved on the upper side of the ball head is fixedly connected to the upper side of the ball head seat through the ball head gasket.

[0014] A ventilation method for a mobile tunnel variable volume ventilation chamber comprises the following steps:

[0015] 1) A movable sealing plate is installed at each end of a set length in the parallel guide tunnel. The parallel guide tunnel located between the two movable sealing plates constitutes the main body of the mobile tunnel variable-volume ventilation chamber. One end of the transverse passage is connected to the main body of the mobile tunnel variable-volume ventilation chamber. A movable sealing plate is provided at the other end of the transverse passage where it communicates with the tunnel, thereby forming a T-shaped mobile tunnel variable-volume ventilation chamber. One end of the transverse tunnel that crosses the parallel guide tunnel and the tunnel is adjacent to the main body of the mobile tunnel variable-volume ventilation chamber. Two input fans arranged outside the other end of the transverse tunnel are respectively communicated with the movable sealing plates at one end of the main body of the mobile tunnel variable-volume ventilation chamber through their respective input air ducts. The output fan on the movable sealing plate at the other end of the mobile tunnel variable-volume ventilation chamber is led to the working face through the output air duct in the parallel guide tunnel, and the output fan on the movable sealing plate at the other end of the transverse passage is led to the working face through the output air duct in the tunnel.

[0016] Simultaneously start two input fans and two output fans. The two input fans introduce fresh air from the cross tunnel into the mobile tunnel variable volume ventilation chamber through their respective input air ducts. The two output fans relay air through their respective output air ducts, supplying air to the corresponding first section working face through the output air ducts that pass through the parallel pilot tunnel and the tunnel respectively.

[0017] 2) After the first section of the working face is completed, the movable sealing plate is moved toward one end of the parallel guide tunnel until it crosses another transverse passage. Another movable sealing plate is installed at the other end of the transverse passage where it connects to the tunnel, thus forming a side-by-side double T-shaped mobile tunnel variable-volume ventilation chamber, which increases the chamber volume and extends the ventilation distance. The arrangement of the input fan, output fan, input air duct, and output air duct remains unchanged, and the direction of fresh air also remains unchanged. The input fan and output fan are started separately to supply air to the second section of the working face.

[0018] 3) Repeat the process of step 2) multiple times, the mobile sealing plate continuously moves toward one end of the parallel guide tunnel, the number of transverse channels connected to the main body of the mobile tunnel variable-volume ventilation chamber increases gradually, and a mobile sealing plate is respectively set at the other end of the newly added transverse channels connected to the tunnel, forming three T-shaped, four T-shaped, to n T-shaped mobile tunnel variable-volume ventilation chambers in parallel; the volume of the mobile tunnel variable-volume ventilation chamber continuously increases, and the ventilation distance continuously extends; the arrangement of the input fan, output fan, input air duct and output air duct remains unchanged, and the direction of the fresh air also remains unchanged; start the corresponding input fan and output fan respectively, and supply air to the third section, fourth section, and nth section working face in turn.

[0019] The present invention installs movable sealing plates at both ends of a set length in a parallel guide tunnel and at the end of a transverse channel connected to the parallel guide tunnel, thereby forming a mobile ventilation chamber. The outer rock surface of the parallel guide tunnel and the transverse channel is used as the sealing surface, which has a simple structure and is easy to set up and use. Moreover, as the tunnel is excavated deeper, the movable sealing plates at both ends of the mobile tunnel variable volume ventilation chamber move accordingly, thereby constructing a new mobile tunnel variable volume ventilation chamber. The present invention does not require the continuous discarding of old ventilation chambers and the construction of new ventilation chambers, which significantly reduces the manufacturing cost of the ventilation chamber. During ventilation, the fan outside the transverse tunnel introduces fresh air into the ventilation chamber, and then the fresh air is input into the working face of the tunnel through the fan on the movable sealing plate, thereby forming relay ventilation, greatly extending the ventilation distance, significantly improving the ventilation efficiency, and significantly improving the air quality in the tunnel, ensuring the safety of construction personnel and construction equipment in the tunnel.

[0020] Other advantages, objectives and features of the present invention will be reflected in part from the following description and will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the main view of the movable sealing plate;

[0022] Figure 2 for Figure 1 Enlarged left view of;

[0023] Figure 3 yes Figure 2 A magnified view of part I;

[0024] Figure 4 yes Figure 3 AA enlarged cross-sectional view;

[0025] Figure 5 This is the moving process diagram of the tunnel variable volume ventilation chamber. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings and an embodiment of a mobile tunnel variable volume ventilation chamber used in the construction of a railway tunnel.

[0027] like Figure 5 As shown in step a, the mobile tunnel variable volume ventilation chamber 10 of this embodiment is set in the parallel guide hole 30 on one side of the tunnel 20 and in one or more transverse passages 40 connecting the parallel guide hole 30 and the tunnel 20. The ports of the tunnel variable volume ventilation chamber 10 are sealed by movable sealing plates 1. Figure 1 and Figure 2As shown, the mobile sealing plate 1 comprises a tire-mounted trolley 2 at the bottom and a vertically mounted sealing plate assembly 3 at the top. The tire-mounted trolley 2 includes two horizontally mounted lower crossbars 21 made of H-shaped steel. The ends of the lower crossbars 21 are supported on the bottom surface of the parallel guide holes 30 by tire devices 22 that can be raised and lowered and rotated about a vertical axis. The outer edge profile of the sealing plate assembly 3 matches the outer circumference of the parallel guide holes 30, and the two ends of the bottom of the sealing plate assembly 3 are welded to the middle portion of the lower crossbars 21.

[0028] The sealing plate assembly 3 comprises an upper curved top frame 31, welded from section steel, a central cross-rib frame 32, curved side frames 33 on either side with movable outer edges, and a bottom frame 34 below the central cross-rib frame 32. Three upper vertical rods 311 are spaced apart within the upper curved top frame 31, with the lower ends of the upper curved top frame 31 adjacent to the tops of the curved side frames 33. A horizontal telescopic cylinder 35 is positioned in the middle of the curved side frames 33. One end of the piston rod 351 of the horizontal telescopic cylinder 35 is hinged to a hinged seat 352 in the middle of the curved rod 331 on the outside of the curved side frames 33, while the other end of the horizontal telescopic cylinder 35 is fixed to the middle of the vertical rod 332 on the inside of the curved side frames 33.

[0029] The horizontal telescopic guide mechanism 36 is disposed on the upper and lower sides of the horizontal telescopic cylinder 35 and includes a movable tube 361 and a fixed tube 362. In this embodiment, both movable tube 361 and fixed tube 362 are made of steel pipe, with the outer diameter of movable tube 361 being smaller than the inner diameter of fixed tube 362. One end of movable tube 361 is welded to the upper and lower portions of the curved rod 331 of the curved side frame 33, while one end of fixed tube 362 is welded to the upper and lower portions of the vertical rod 332 of the curved side frame 33. The other end of movable tube 361 is inserted into the other end of the corresponding fixed tube 362.

[0030] The ends of the cross ribs 321 of the central cross rib frame 32 are welded to the lower middle portion of the upper curved top frame 31, the middle portion of the lower connecting crossbar 322 of the central cross rib frame 32, and the middle portions of the vertical bars 332 of the two curved side frames 33. The lower connecting crossbar 322, the lower portions of the vertical bars 332 on the inner sides of the curved side frames 33, the lower vertical bars 323 welded to the lower middle portions of the lower connecting crossbar 322, and the bottom bars 341 welded to the lower ends of the lower vertical bars 323 form the bottom frame 34. Masking plates 312 made of 2-3 mm thick steel plates are welded to the sides of the upper curved top frame 31, the central cross rib frame 32, and the bottom frame 34. The sides of the curved side frames 33 are covered with canvas 333, the outer edges of the canvas 333 extending outward from the curved rods 331 of the curved side frames 33. The curved rods 331 on the outer sides of the curved side frames 33 are driven outward by the horizontal telescopic oil cylinder 35, and the structure in which the outer edges 3331 of the canvas extend outward from the curved rods 331 significantly improves the sealing effect between the sealing plate assembly 3 and the inner rock surface of the parallel guide tunnel 30 and the inner rock surface of the transverse passage 40, making it difficult for the fresh air stored in the tunnel variable volume ventilation chamber 10 of the present invention to leak. The horizontal telescopic guide mechanism 36 guides the movement of the canvas 333, preventing the distortion of the canvas 333 from weakening the sealing effect of the sealing plate assembly 3. The two ends of the oblique support rod 35 are respectively welded to the middle of the two sides of the vertical rod 332 of the curved side frame 33 and the middle of the lower cross bar 21, thereby improving the support stability of the sealing plate assembly 3.

[0031] like Figure 1 and Figure 5 As shown, the upper curved top frame 31 of the movable sealing plate 1 at the left end of the mobile tunnel variable volume ventilation chamber body 101 of this embodiment is equipped with an output fan 52. On the movable sealing plate 1 at the right end of the mobile tunnel variable volume ventilation chamber body 101, the upper curved top frame 31 is provided with two air duct holes 313 for passing the input air duct 61, and the bottom frame 34 is provided with one or two opening and closing doors 342 for easy access of construction personnel.

[0032] like Figure 3 and Figure 4As shown, the tire device 22 includes a wheel frame 221, a tire 222, a drive mechanism 23, a wheel frame rotation mechanism 24, a wheel frame lifting mechanism 25, and an electromagnetic brake 26. The tire 222 is fixed to the middle of a support shaft 223 within the wheel frame 221. The ends of the support shaft 223 are supported on both sides of the wheel frame 221 via support bearings 224. The drive mechanism 23 includes a drive motor 231 and a drive reducer 232. One end of the drive motor 231 is connected to the drive reducer 232. One side of the drive reducer 232 is vertically fixed to one side of the wheel frame 221. The spline output shaft 233 of the drive reducer 232 is inserted into the spline hole 2231 at one end of the support shaft 223. When the sealing plate assembly 3 needs to be moved, the operator starts the drive motors 232 of the four drive mechanisms 23 at the same time through the controller instructions to rotate synchronously, driving the four drive motor reducers 232 to operate synchronously. After the two-stage reduction transmission of the motor reducer 232, the tires 222 of the four tire devices 22 are driven to rotate synchronously, pushing the mobile sealing plate 1 to move to the specified position, thereby changing the volume of the tunnel variable-volume ventilation chamber 10 to meet the ventilation needs of the tunnel 10 heading face.

[0033] The wheel frame rotation mechanism 24 is mounted on the top of the wheel frame 221. The wheel frame lifting mechanism 25 is located between the upper side of the wheel frame rotation mechanism 24 and the lower sides of the lower crossbar 21. The electromagnetic brake 26 is mounted on one end of the wheel frame 221. The brake shoe 261 at one end of the electromagnetic brake 26 is adjacent to one side of the tire. When the tire assembly 22 needs to be stopped, the operator commands the electromagnetic brake 26 to be energized via the controller. Under the action of the electromagnetic force, the brake shoe 261 moves outward and presses against one side of the tire 222, braking the tire 222 and stopping the movable sealing plate 1 at the desired position.

[0034] The wheel frame rotation mechanism 24 includes a rotary motor reducer assembly 241, a vertical spindle 242, a stepped housing 243 and two rotary bearings 244. The lower side of the stepped housing 243 is fixed on the top surface of the wheel frame 221, and the bottom of the rotary motor reducer assembly 241 is fixed on the upper side of one end of the bottom shell 2431 of the stepped housing 243. The output shaft 2411 of the rotary motor reducer assembly extends into the left end of the bottom shell 2431, and the pinion 245 is fixed on the output shaft 2411 of the rotary motor reducer assembly. The lower end of the vertical spindle 242 extends into the middle part of the bottom shell 2431, and the lower end of the vertical spindle 242 is fixed to the top center of the wheel frame 221 through the square handle 2421 and two fastening nuts 247. The large gear 246 located in the middle of the bottom shell 2431 is fixed on the lower end of the vertical shaft 242, the small gear 245 is engaged with the large gear 246, the upper part of the vertical shaft 242 is supported in the upper shell 2432 of the stepped shell 243 through two rotary bearings 244, and the upper end of the vertical shaft 242 is connected to the lower end of the wheel frame lifting mechanism 25 at one end of the lower cross bar 21. When the tire device 22 at one end of the lower cross bar 21 needs to turn synchronously, the operator starts the rotary motor reducer assembly 241 at one end of the two lower cross bars 21 synchronously through the controller instruction. After the first stage reduction transmission of the rotary motor reducer assembly 241 and the second stage reduction transmission of the small gear 245 and the large gear 246 in the stepped housing 243, the small gear 245 is driven to roll along the pitch circle of the large gear 246 around the axis of the vertical core shaft 242, thereby driving the respective wheel frames 221 and tires 222 to swing around the axis of the vertical core shaft 242 through the stepped housing 243 on the wheel frame 221 at one end of the lower cross bar 21, thereby realizing the synchronous turning of the tire 222 under one end of the lower cross bar 21, thereby driving the turning of the movable sealing plate 1.

[0035] The wheel frame lifting mechanism 25 includes a vertical support shell 251, an upper cover 252, a lifting cylinder 253, a ball head seat 254, a ball head cover 255, a flange 256 and two guide strips 257. One side of the circular tubular vertical support shell 25 is welded and fixed to both ends of the lower cross bar 21. The top of the vertical spindle 242 extends into the vertical support shell 25. The vertically arranged guide strips 257 are symmetrically fixed on the inner wall of the vertical support shell 25. The flange 256 is positioned and fixed on the top of the vertical spindle 242. The guide slots 256 are symmetrically arranged on the outer edge of the flange 256. 1 are respectively embedded in the corresponding guide strips 257, the upper cover 252 is fixed to the upper end port of the vertical support shell 25, the lifting cylinder 253 is vertically fixed to the upper cover 252, the piston rod 2531 of the lifting cylinder 253 passes downward through the upper cover 252 and extends into the vertical support shell 25, the ball head seat 254 is positioned and fixed on the flange 256, the ball head 2532 fixed to the lower end of the piston rod 2531 abuts against the ball head seat 254, and the ball head cover 256 sleeved on the upper side of the ball head 2532 is fixedly connected to the upper side of the ball head seat 254 through the ball head washer 258. When the sealing plate assembly 3 needs to be raised, the operator instructs the electromagnetic reversing valve of the lifting cylinder 253 to reverse direction through the controller. The upper chambers of the four lifting cylinders 253 are simultaneously filled with oil, and the lower chambers are simultaneously returned to oil. The piston rods 2531 of the lifting cylinders 253 at both ends of the lower crossbar 21 move downward synchronously. Under the guidance of the guide bars 257 on the guide notches 2561 on both sides of the flange 256, the vertical support shells 251 at both ends of the lower crossbar 21 simultaneously push the sealing plate assembly 3 upward, so that the top of the sealing plate assembly 3 rests on the top surface of the tunnel 20 or the transverse passage 40, thereby improving the sealing effect of the mobile tunnel variable volume ventilation chamber 10. The process of lowering the sealing plate assembly 3 is the opposite of the aforementioned raising process.

[0036] A ventilation method for a mobile tunnel variable volume ventilation chamber 10 comprises the following steps:

[0037] 1) If Figure 5As shown in process a, a movable sealing plate 1 is installed at both ends of the set length in the parallel guide tunnel 30, and the parallel guide tunnel 30 located between the two movable sealing plates 1 constitutes the mobile tunnel variable volume ventilation warehouse main body 101. One end of the transverse channel 40 is connected to the mobile tunnel variable volume ventilation warehouse main body 101, and a movable sealing plate 1 is set at the other end of the transverse channel 40 where it communicates with the tunnel 20, thereby forming a T-shaped mobile tunnel variable volume ventilation warehouse 10. One end of the transverse tunnel 50 that crosses the parallel guide tunnel 30 and the tunnel 20 is adjacent to the mobile tunnel variable-volume ventilation chamber main body 101, and the two input fans 51 arranged outside the other end of the transverse tunnel 50 are respectively connected to the mobile sealing plate 1 at the right end of the mobile tunnel variable-volume ventilation chamber main body 101 through their respective input air ducts 61. The output fan 52 on the mobile sealing plate 1 at the left end of the mobile tunnel variable-volume ventilation chamber main body 101 is led to the working face through the output air duct 62 in the parallel guide tunnel 30, and the output fan 52 on the mobile sealing plate 1 at the other end of the transverse channel 40 is led to the working face through the output air duct 62 in the tunnel 20.

[0038] Simultaneously start the two input fans 51 and the two output fans 52, such as Figure 5 In the direction indicated by the middle arrow, the two input fans 51 introduce the fresh air outside the cross tunnel 50 into the mobile tunnel variable volume ventilation chamber 10 through their respective input air ducts 61, and the two output fans 52 relay the air through their respective output air ducts 62, and supply air to the corresponding first section working face through the output air ducts 62 that pass through the parallel guide tunnels 30 and the tunnel 20 respectively.

[0039] 2) After the first section of the tunnel face operation is completed, if Figure 5 As shown in step b, the movable sealing plate 1 is moved toward the left end of the parallel guide tunnel 30 until it crosses another transverse passage 40. Another movable sealing plate 1 is installed at the other end of the transverse passage 40, where it connects to the tunnel. This forms a side-by-side double-T-shaped mobile tunnel variable-volume ventilation chamber 10, increasing the chamber's volume and extending the ventilation distance. The arrangement of the input fan 51, output fan 52, input air duct 61, and output air duct 62 remains unchanged, as does the direction of fresh air. The input fan 51 and output fan 52 are activated separately to supply air to the second working face.

[0040] 3) Repeat step 2) several times, such as Figure 5As shown in process c, the mobile sealing plate 1 continuously moves toward the left end of the parallel guide tunnel 30, and the number of transverse channels 40 connected to the mobile tunnel variable-volume ventilation chamber 101 increases. A mobile sealing plate 1 is respectively set at the other end of the newly added transverse channels 40 connected to the tunnel 20, forming three T-shaped, four T-shaped, to n T-shaped mobile tunnel variable-volume ventilation chambers 10 in parallel. The volume of the mobile tunnel variable-volume ventilation chamber 10 continues to increase, and the ventilation distance continues to extend. The arrangement of the input fan 51, the output fan 52, the input air duct 61, and the output air duct 62 remains unchanged, and the direction of the fresh air also remains unchanged. Start the input fan 51 and the output fan 52 separately, and carry out the air supply to the third section, the fourth section, and the nth section of the working face in sequence.

[0041] In addition to the above embodiments, the present invention may also have other implementation methods. Any technical solutions formed by equivalent replacement and equivalent transformation fall within the protection scope required by the present invention.

Claims

1. A mobile tunnel variable volume ventilation chamber, characterized in that: The movable tunnel variable volume ventilation chamber is arranged in a parallel guide tunnel on one side of the tunnel and in one or several transverse passages connecting the parallel guide tunnel and the tunnel, and the ports of the tunnel variable volume ventilation chamber are sealed by movable sealing plates respectively; the movable sealing plate comprises a tire-type trolley at the bottom and a sealing plate assembly vertically arranged at the top, the tire-type trolley comprises two lower cross bars made of section steel and arranged horizontally, and the two ends of the lower cross bars are supported on the bottom surface of the parallel guide tunnel by tire devices that can be lifted and rotated around the vertical axis; the outer edge contour of the sealing plate assembly matches the outer peripheral surface of the parallel guide tunnel, and the two ends of the bottom of the sealing plate assembly are respectively welded and fixed on the middle part of the lower cross bar; the sealing plate assembly comprises an upper arc-shaped top frame, a center cross rib frame, arc-shaped side frames with movable outer edges on both sides and a bottom frame on the lower side of the center cross rib frame, which are respectively welded with section steel, and several upper vertical poles are arranged at intervals in the upper arc-shaped top frame, and the lower sides of the two ends of the upper arc-shaped top frame are adjacent to the top of the arc-shaped side frame respectively; a horizontal telescopic oil is provided in the middle of the arc-shaped side frame Cylinder, one end of the piston rod of the horizontal telescopic oil cylinder is respectively hinged to the hinge seat in the middle of the arc rod on the outside of the arc side frame, and the other end of the horizontal telescopic oil cylinder is respectively fixed to the middle of the vertical rod on the inside of the arc side frame; the horizontal telescopic guide mechanism is respectively arranged on the upper and lower sides of the horizontal telescopic oil cylinder; the cross rib end of the center cross rib frame is respectively welded to the middle of the lower side of the upper arc top frame, the middle of the lower connecting cross bar of the center cross rib frame and the middle of the vertical rod of the two arc side frames; the lower connecting cross bar, the arc on both sides The lower part of the vertical rod on the inner side of the side frame, the lower upright rods welded to the lower side of the middle part of the lower connecting horizontal rod, and the bottom rods welded to the lower ends of the lower upright rods at both ends are welded to form the bottom frame; the side surfaces of the upper arc-shaped top frame, the side surfaces of the central cross rib frame and the side surfaces of the bottom frame are respectively welded with masks made of steel plates with a thickness of 2 to 3 mm, and the side surfaces of the arc-shaped side frames are respectively covered with canvas, and the outer edges of the canvas extend outwards of the arc-shaped rods of the arc-shaped side frames; the two ends of the oblique support rods are respectively welded to the middle parts of both sides of the vertical rods of the arc-shaped side frames and the middle part of the lower horizontal rod.

2. The mobile tunnel variable volume ventilation chamber according to claim 1, characterized in that: The bottom frame is provided with 1 or 2 opening and closing doors.

3. The mobile tunnel variable volume ventilation chamber according to claim 1, characterized in that: The horizontal telescopic guide mechanism includes a movable tube and a fixed tube. One end of the movable tube is welded and fixed to the upper and lower parts of the arc-shaped rod of the arc-shaped side frame, and one end of the fixed tube is welded and fixed to the upper and lower parts of the vertical rod of the arc-shaped side frame. The other end of the movable tube is inserted into the other end of the corresponding fixed tube.

4. The mobile tunnel variable volume ventilation chamber according to claim 1, characterized in that: The tire device includes a wheel frame, a tire, a driving mechanism, a wheel frame rotating mechanism, a wheel frame lifting mechanism and an electromagnetic brake. The tire is fixed on the middle part of the support shaft in the wheel frame, and the two ends of the support shaft are supported on both sides of the wheel frame through support bearings respectively; the driving mechanism is fixed on the outside of the wheel frame, the wheel frame rotating mechanism is arranged on the top of the wheel frame, the wheel frame lifting mechanism is located between the upper side of the wheel frame rotating mechanism and the lower sides of the two ends of the lower cross bar, the electromagnetic brake is arranged on one end of the wheel frame, and the brake shoe at one end of the electromagnetic brake is adjacent to one side of the tire.

5. The mobile tunnel variable volume ventilation chamber according to claim 4, characterized in that: The driving mechanism includes a driving motor and a driving reducer. One end of the driving motor is connected to the driving reducer. One side of the driving reducer is vertically fixed on one side of the wheel frame. The spline output shaft of the driving reducer is inserted into the spline hole at one end of the support shaft.

6. The mobile tunnel variable volume ventilation chamber according to claim 4, characterized in that: The wheel frame rotating mechanism includes a rotating motor reducer assembly, a vertical spindle, a stepped housing and two rotating bearings. The lower side of the stepped housing is fixed on the top surface of the wheel frame, the bottom of the rotating motor reducer assembly is fixed on the upper side of one end of the bottom shell of the stepped housing, the output shaft of the rotating motor reducer assembly extends into one end of the bottom shell, the small gear is fixed on the output shaft of the rotating motor reducer assembly, the lower end of the vertical spindle extends into the middle of the bottom shell, and the lower end of the vertical spindle is fixed on the top center of the wheel frame; the large gear located in the middle of the bottom shell is fixed on the lower end of the vertical spindle, the small gear is engaged with the large gear, and the upper part of the vertical spindle is supported in the upper shell of the stepped housing by two rotating bearings, and the upper ends of the vertical spindle are respectively connected with the lower ends of the wheel frame lifting mechanism at one end of the lower cross bar.

7. The mobile tunnel variable volume ventilation chamber according to claim 6, characterized in that: The wheel frame lifting mechanism includes a vertical support shell, an upper cover, a lifting cylinder, a ball head seat, a ball head cover, a flange and two guide strips. One side of the circular tubular vertical support shell is welded and fixed to the two ends of the lower cross bar, and the top of the vertical core shaft extends into the vertical support shell. The vertically arranged guide strips are symmetrically fixed on the inner wall of the vertical support shell. The flange is positioned and fixed on the top of the vertical core shaft. The guide grooves symmetrically arranged on the outer edge of the flange are respectively embedded in the corresponding guide strips. The upper cover is fixed on the upper end port of the vertical support shell. The lifting cylinder is vertically fixed to the upper cover. The piston rod of the lifting cylinder passes downward through the upper cover and extends into the vertical support shell. The ball head seat is positioned and fixed on the flange. The ball head fixed at the lower end of the piston rod rests on the ball head seat. The ball head cover sleeved on the upper side of the ball head is fixedly connected to the upper side of the ball head seat through the ball head gasket.

8. A ventilation method for a mobile tunnel variable volume ventilation chamber according to any one of claims 1 to 7, characterized in that: The following steps are involved: 1) A movable sealing plate is installed at each end of a set length in the parallel guide tunnel. The parallel guide tunnel located between the two movable sealing plates constitutes the main body of the mobile tunnel variable-volume ventilation chamber. One end of the transverse passage is connected to the main body of the mobile tunnel variable-volume ventilation chamber. A movable sealing plate is provided at the other end of the transverse passage where it communicates with the tunnel, thereby forming a T-shaped mobile tunnel variable-volume ventilation chamber. One end of the transverse tunnel that crosses the parallel guide tunnel and the tunnel is adjacent to the main body of the mobile tunnel variable-volume ventilation chamber. Two input fans arranged outside the other end of the transverse tunnel are respectively communicated with the movable sealing plates at one end of the main body of the mobile tunnel variable-volume ventilation chamber through their respective input air ducts. The output fan on the movable sealing plate at the other end of the mobile tunnel variable-volume ventilation chamber is led to the working face through the output air duct in the parallel guide tunnel, and the output fan on the movable sealing plate at the other end of the transverse passage is led to the working face through the output air duct in the tunnel. Simultaneously start two input fans and two output fans. The two input fans introduce fresh air from the cross tunnel into the mobile tunnel variable volume ventilation chamber through their respective input air ducts. The two output fans relay air through their respective output air ducts, supplying air to the corresponding first section working face through the output air ducts that pass through the parallel pilot tunnel and the tunnel respectively. 2) After the first section of the working face is completed, the movable sealing plate is moved toward one end of the parallel guide tunnel until it crosses the other transverse passage. Another movable sealing plate is installed at the other end of the transverse passage where it connects to the tunnel, thus forming a side-by-side double T-shaped mobile tunnel variable volume ventilation chamber, which increases the chamber volume and extends the ventilation distance. The arrangement of the input fan, output fan, input air duct, and output air duct remains unchanged, and the direction of the fresh air also remains unchanged. Start the input fan and output fan respectively to supply air to the second working face; 3) Repeat the process of step 2) multiple times, the mobile sealing plate continuously moves toward one end of the parallel guide tunnel, the number of transverse channels connected to the main body of the mobile tunnel variable-volume ventilation chamber increases gradually, and a mobile sealing plate is respectively set at the other end of the newly added transverse channels connected to the tunnel, forming three T-shaped, four T-shaped, to n T-shaped mobile tunnel variable-volume ventilation chambers in parallel; the volume of the mobile tunnel variable-volume ventilation chamber continuously increases, and the ventilation distance continuously extends; the arrangement of the input fan, output fan, input air duct and output air duct remains unchanged, and the direction of the fresh air also remains unchanged; start the corresponding input fan and output fan respectively, and supply air to the third section, fourth section, and nth section working face in turn.

Images