Ventilation device convenient to install and used for tunnel construction

Abstract

The invention provides a ventilation device convenient to install and used for tunnel construction, and relates to the technical field of tunnel ventilation, the ventilation device comprises a fan, an installation assembly is arranged outside the fan, the installation assembly comprises an installation block, a lifting assembly is arranged outside the installation block, the lifting assembly comprises a U-shaped plate, and an arc-shaped limiting strip and an arc-shaped groove are arranged; firstly, the device body and the fan are transferred to the position where the device body and the fan need to be installed, a supporting plate is placed on the tunnel ground, then the fan is placed on an installation block, an arc-shaped limiting strip is inserted into a strip-shaped groove to achieve the preliminary limiting effect on the fan, meanwhile, a positioning block on a fixing plate is inserted into a positioning groove, and then the fan is installed. When the positioning block is inserted into the positioning groove, the locking block is extruded, the locking block is extruded into the mounting cavity, the locking block can be inserted into the inserting groove through resilience force of the spring to lock the positioning block, mounting can be rapidly completed, and time and labor are saved.

Description

Technical Field

[0001] The present invention belongs to the technical field of tunnel ventilation, and more specifically, particularly relates to a ventilation device for tunnel construction which is easy to install. Background Art

[0002] A tunnel is an underground building buried in the geological layer. There are many mountains in my country, so there are also many tunnels. Generally, tunnels are mostly used for railway tunnels and highway tunnels. Since tunnels are excavated and dug in mountains or underground, especially underground tunnels are built in a sealed environment, if the air cannot be fully replaced, serious production accidents will occur. Therefore, fans are needed to replace the air, and most of the existing ventilation devices have the following problems:

[0003] 1. Existing ventilation devices are generally installed in a hanging or column-type manner. The hanging installation method is to hang the fan on the top of the tunnel and fix it with a hanger or a hanger rod. Although it is conducive to air circulation, it is inconvenient for maintenance. The column-type installation supports the fan on the ground through a stand. Although it is convenient for maintenance, it requires more fasteners to fix it during installation, and the installation process is more cumbersome. Therefore, most of the existing ventilation devices are difficult to install.

[0004] 2. Most of the existing hanging or column-mounted ventilation devices are not provided with height adjustment. After the fixed installation is completed, it is not easy to adjust the height of the ventilation device according to needs, which has the problem of low applicability.

[0005] Therefore, in view of this, the existing structure and defects are studied and improved, and a ventilation device for tunnel construction that is easy to install is provided, in order to achieve a purpose with greater practical value. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a ventilation device for tunnel construction which is easy to install to solve the above problems.

[0007] A ventilation device for tunnel construction which is easy to install comprises a fan. A mounting assembly is arranged outside the fan. The mounting assembly comprises a mounting block. A lifting assembly for adjusting the height of the mounting block is arranged outside the mounting block. The lifting assembly comprises a U-shaped plate.

[0008] Preferably, a strip groove is provided on the outer wall of the fan, a fixing plate is fixed on both the left and right sides of the fan, a positioning block is fixedly connected to the bottom of the fixing plate, and a slot is provided on the side wall of the positioning block.

[0009] Preferably, an arc-shaped groove is provided on the top of the mounting block, an arc-shaped limiting strip is fixedly connected to the inner wall of the arc-shaped groove, and the arc-shaped limiting strip is clamped in the strip groove provided on the outer wall of the fan.

[0010] Preferably, an installation cavity is provided on both sides of the interior of the installation block, and a movable plate is slidably connected to the interior of the installation cavity, and a locking block is fixedly connected to one side of the movable plate, which is inserted into the interior of the slot, and a pull rod is fixedly connected to the side of the movable plate away from the locking block. The outer sleeve of the pull rod is provided with a spring installed in the interior of the installation cavity, and a positioning groove is provided on the top surface of the installation block, and the positioning groove is matched with the positioning block. The fan is placed in the arc groove on the installation block, and the arc limit strip is inserted into the strip groove to have a preliminary limiting effect on the fan. At the same time, when the positioning block on the fixed plate is inserted into the positioning groove, the locking block will be squeezed to move into the interior of the installation cavity, and the locking block can be inserted into the slot through the rebound force of the spring to lock the positioning block, so that the installation can be completed quickly, saving time and effort.

[0011] Preferably, the locking block is trapezoidal and the pull rod is L-shaped, one end of the pull rod passes through the mounting block and extends to the outside, and the spring is installed between the movable plate and the inner wall of the mounting cavity. Through the trapezoidal structure of the locking block, when the positioning block is inserted into the positioning slot, it will squeeze the locking block into the mounting cavity, and make the movable plate slide and squeeze the spring to make it expand and contract. Through the rebound force of the spring, the locking block can be inserted into the interior when it is aligned with the slot, thereby locking the positioning block, and the installation can be completed quickly. The pull rod can be used when disassembling the fan. By pulling the pull rod, the pull rod drives the movable plate to slide in the mounting cavity, and the movable plate drives the locking block to disengage from the slot opened on the side wall of the positioning block. At this time, the positioning block can be smoothly disengaged from the positioning slot, and then the fan can be removed from the mounting block.

[0012] Preferably, a support plate is fixed to the bottom of the U-shaped plate, and sliding grooves are provided on the two inner side walls on the left and right of the U-shaped plate. The interior of the left sliding groove is rotatably connected to a threaded rod, and the external thread of the threaded rod is connected to a moving block. The moving block is slidably connected to the interior of the left sliding groove, and the interior of the right sliding groove is slidably connected to a slider. The slider and the moving block are respectively fixed to the left and right side walls of the mounting block, and the sliding groove and the slider on the right side play a limiting role.

[0013] Preferably, a driven bevel gear is fixedly connected to the outside of the threaded rod, a rotating rod passes through one side of the U-shaped plate, and a driving bevel gear is fixedly connected to the side of the rotating rod close to the driven bevel gear. The driving bevel gear is meshed with the driven bevel gear, and the moving block is slidably connected to the inside of the slide groove, which plays a limiting role on the mounting block. By rotating the rotating ring clockwise or counterclockwise to drive the driving bevel gear to rotate, the driven bevel gear can be rotated to drive the threaded rod to rotate, so that the moving block drives the mounting block to rise and fall, and the height of the fan is adjusted according to the requirements of the duct installation.

[0014] Preferably, a rotating ring is fixedly connected to the side of the rotating rod away from the active bevel gear, and the rotating ring is provided with a plurality of through grooves. A fixed block is fixed to the side wall of the U-shaped plate, and an insertion rod is inserted into the interior of the fixed block. One end of the insertion rod is inserted into the interior of the through groove. The insertion of the insertion rod into the interior of the through groove has a limiting effect on the rotating ring, thereby preventing the rotating ring from rotating easily.

[0015] Preferably, a plug-in groove is provided on the inner wall of the U-shaped plate, a counterweight block is placed on the inner bottom surface of the U-shaped plate, a plug-in block is fixedly connected to the bottom of the counterweight block, the plug-in block is adapted to the plug-in groove on the inner wall of the U-shaped plate, and the U-shaped plate is provided with storage grooves on both sides of the counterweight block, and two grooves are provided on the top surface of the counterweight block, and handles are fixedly connected to the two grooves, the overall height of the counterweight block is flush with the top surface of the storage groove, the height of the counterweight block and the top surface of the storage groove are both lower than the height of the bottom surface of the slide groove, and the storage groove can be used to place the tools required for the overall maintenance device, and the handles facilitate the installer to lift the counterweight block.

[0016] Preferably, a wind hood is installed on one side of the fan, and a ventilation duct is installed on the side of the wind hood away from the fan. The outer wall of the ventilation duct is provided with threads. The threads provided on the outer wall of the ventilation duct facilitate the subsequent assembly and docking of multiple ventilation ducts according to the actual needs of the tunnel scene.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] In the present invention, by providing an arc-shaped limit strip and an arc-shaped groove, the fan is placed in the arc-shaped groove on the mounting block, and the arc-shaped limit strip is inserted into the strip groove to have a preliminary limiting effect on the fan. At the same time, when the positioning block on the fixed plate is inserted into the interior of the positioning groove, it will squeeze the locking block to move into the interior of the mounting cavity. The locking block can be inserted into the slot through the rebound force of the spring to lock the positioning block, so that the installation can be completed quickly, saving time and effort, and making the present application easy to install.

[0019] In the present invention, by providing a rotating ring, an active bevel gear and a driven bevel gear, the active bevel gear can be driven to rotate by rotating the rotating ring clockwise or counterclockwise, so that the driven bevel gear can be rotated to drive the threaded rod to rotate, and drive the moving block to move up and down in the slide groove, so that the moving block drives the installation block to rise and fall, and the height of the fan is adjusted according to the requirements of the air duct installation, so that the present application has the effect of adjustable fan height.

[0020] In the present invention, by providing an insertion rod, the insertion rod can not only be used to fix the rotating ring, but also when the rotating ring needs to be rotated, the insertion rod is removed from the fixed block, and one end of the insertion rod is inserted into the through groove provided in the rotating ring, and the rotating ring is rotated by twisting the insertion rod, thereby driving the rotating rod and the active bevel gear to rotate, thereby driving the driven bevel gear and the threaded rod to rotate, making the rotation of the rotating ring more labor-saving and convenient, making the application more convenient to adjust the height of the fan, and making the application have the effect of facilitating the adjustment of the height of the fan.

[0021] In the present invention, by providing a storage tank, various tools for repairing the entire device can be placed in the storage tank to prevent the entire device from being damaged when working in the tunnel. The maintenance personnel need to go back and forth to the outside to get the tools, which is time-consuming, making the application easy to use.

[0022] In the present invention, a counterweight block is provided, and two grooves are formed on the top surface of the counterweight block. Handles are fixedly connected in the two grooves, and the counterweight block can be lifted by the handles. During the transportation and installation stage of the overall device, the plug-in block fixed at the bottom of the counterweight block can be separated from the plug-in groove on the inner wall of the U-shaped plate, and then the counterweight block, the fan and the overall device are transported and installed separately in conjunction with the split-type fan, so as to prevent the overall device from being too heavy when transported at the same time, which affects the transportation and installation of the staff. After the overall transportation and installation of the device are completed, the counterweight block and the fan are installed on the U-shaped plate and the mounting block to press down the overall device. The separate counterweight block and the modular structure of the device make the present application easy to install.

[0023] In the present invention, a rotating ring is provided, and the active bevel gear is driven to rotate by rotating the rotating ring clockwise or counterclockwise, so that the driven bevel gear can be rotated to drive the threaded rod to rotate, so that the moving block drives the mounting block to rise and fall, and the height of the fan is adjusted according to the requirements of the air duct installation. Compared with the electric drive method, the device adopts a manual method to adjust the height of the fan, so that the present application has higher stability and applicability, and is more suitable for use in locations such as tunnels where it is difficult to connect circuits.

[0024] In the present invention, by providing an assembled structure, the fan and the mounting block are separate structures. When the fan is damaged, the pull rod can be pulled, and the pull rod drives the movable plate to slide in the mounting cavity. The movable plate drives the locking block to disengage from the slot provided in the side wall of the positioning block. At this time, the positioning block can be smoothly disengaged from the positioning slot, and then the fan can be removed from the mounting block, and the fan can be transported out of the tunnel alone for maintenance. Compared with traditional hanging-mounted or column-mounted fixed fans, the present application has the effect of facilitating maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic cross-sectional structural diagram of the entire device of the present invention;

[0026] Figure 2 The present invention Figure 1 A schematic diagram of the enlarged structure at point A;

[0027] Figure 3 The present invention Figure 1 A schematic diagram of the enlarged structure at B;

[0028] Figure 4 It is a schematic diagram of the structure of the rotating ring of the present invention;

[0029] Figure 5 It is a schematic diagram of the fan structure of the present invention;

[0030] Figure 6 It is a schematic diagram of the three-dimensional structure of the U-shaped plate of the present invention;

[0031] Figure 7 It is a schematic diagram of the structure of the rotating ring of the present invention in an explosion state;

[0032] Figure 8 It is a structural schematic diagram of the U-shaped plate and the counterweight block of the present invention in a separated state;

[0033] Fig. 9 It is a schematic diagram of a three-dimensional structure of a half-section of a U-shaped plate of the present invention;

[0034] Fig.10 It is a schematic diagram of the transmission structure of the driving bevel gear and the driven bevel gear of the present invention.

[0035] In the figure, the correspondence between the component names and the figure numbers is: 1. Support plate; 2. U-shaped plate; 3. Counterweight block; 31. Groove; 32. Handle; 4. Mounting block; 5. Fan; 51. Wind hood; 52. Ventilation duct; 6. Arc limit strip; 7. Moving block; 8. Threaded rod; 9. Slider; 10. Slide groove; 11. Fixed plate; 12. Positioning block; 13. Positioning groove; 14. Pull rod; 15. Movable plate; 16. Spring; 17. Locking block; 18. Slot; 19. Rotating rod; 20. Active bevel gear; 21. Driven bevel gear; 22. Fixed block; 23. Insert rod; 24. Through groove; 25. Rotating ring; 26. Storage slot. DETAILED DESCRIPTION

[0036] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0037] Example:

[0038] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 The present invention provides a ventilation device for tunnel construction that is easy to install, including a fan 5. A mounting assembly is arranged outside the fan 5. The mounting assembly includes a mounting block 4. A lifting assembly for adjusting the height of the mounting block 4 is arranged outside the mounting block 4. The lifting assembly includes a U-shaped plate 2.

[0039] The outer wall of the fan 5 is provided with a strip groove, and a fixing plate 11 is fixed to both the left and right sides of the fan 5 . A positioning block 12 is fixedly connected to the bottom of the fixing plate 11 , and a slot 18 is provided on the side wall of the positioning block 12 .

[0040] An arc-shaped groove is formed on the top of the mounting block 4 , and an arc-shaped limiting strip 6 is fixedly connected to the inner wall of the arc-shaped groove. The arc-shaped limiting strip 6 is clamped in the strip-shaped groove formed on the outer wall of the fan 5 .

[0041] Installation cavities are provided on both sides of the interior of the mounting block 4, and a movable plate 15 is slidably connected to the interior of the installation cavity. A locking block 17 is fixedly connected to one side of the movable plate 15, and the locking block 17 is inserted into the interior of the slot 18. A pull rod 14 is fixedly connected to the side of the movable plate 15 away from the locking block 17, and a spring 16 installed in the interior of the installation cavity is sleeved on the outside of the pull rod 14. A positioning groove 13 is provided on the top surface of the mounting block 4, and the positioning groove 13 is adapted to the positioning block 12. The fan 5 is placed in the arc groove on the mounting block 4, and the arc-shaped limiting strip 6 is inserted into the strip groove to have a preliminary limiting effect on the fan 5. At the same time, when the positioning block 12 on the fixed plate 11 is inserted into the interior of the positioning groove 13, the locking block 17 will be squeezed to move into the interior of the installation cavity. The resilience of the spring 16 can make the locking block 17 inserted into the slot 18 to lock the positioning block 12, so that the installation can be completed quickly, saving time and effort.

[0042] The locking block 17 is trapezoidal, and the pull rod 14 is L-shaped. One end of the pull rod 14 passes through the mounting block 4 and extends to the outside. The spring 16 is installed between the movable plate 15 and the inner wall of the mounting cavity. Through the trapezoidal structure of the locking block 17, when the positioning block 12 is inserted into the interior of the positioning slot 13, it will squeeze the locking block 17 to move into the interior of the mounting cavity, and make the movable plate 15 slide and squeeze the spring 16 to make it expand and contract. Through the rebound force of the spring 16, the locking block 17 can be inserted into the interior when it is aligned with the slot 18, thereby locking the positioning block 12, and the installation can be quickly completed. The pull rod 14 can be used when disassembling the fan 5. By pulling the pull rod 14, the pull rod 14 drives the movable plate 15 to slide in the mounting cavity, and the movable plate 15 drives the locking block 17 to disengage from the slot 18 opened on the side wall of the positioning block 12. At this time, the positioning block 12 can be smoothly disengaged from the positioning slot 13, and then the fan 5 can be removed from the mounting block 4.

[0043] A support plate 1 is fixed to the bottom of the U-shaped plate 2, and sliding grooves 10 are provided on the two inner side walls on the left and right of the U-shaped plate 2. A threaded rod 8 is rotatably connected to the inside of the sliding groove 10 on the left, and a moving block 7 is threadedly connected to the outside of the threaded rod 8. The moving block 7 is slidably connected to the inside of the sliding groove 10 on the left, and a slider 9 is slidably connected to the inside of the sliding groove 10 on the right. The slider 9 and the moving block 7 are respectively fixed on the left and right side walls of the mounting block 4, and the sliding groove 10 and the slider 9 on the right play a role of limiting.

[0044] The outside of the threaded rod 8 is fixedly connected to a driven bevel gear 21, a rotating rod 19 passes through one side of the U-shaped plate 2, and a driving bevel gear 20 is fixedly connected to the side of the rotating rod 19 close to the driven bevel gear 21. The driving bevel gear 20 is meshed with the driven bevel gear 21, and the moving block 7 is slidably connected to the inside of the slide groove 10, which plays a limiting role on the mounting block 4. By rotating the rotating ring 25 clockwise or counterclockwise to drive the driving bevel gear 20 to rotate, the driven bevel gear 21 can be rotated to drive the threaded rod 8 to rotate, so that the moving block 7 drives the mounting block 4 to rise and fall, and the height of the fan 5 is adjusted according to the requirements of the air duct installation.

[0045] The rotating ring 25 is fixedly connected to the side of the rotating rod 19 away from the active bevel gear 20. The rotating ring 25 is provided with a plurality of through grooves 24. A fixing block 22 is fixed to the side wall of the U-shaped plate 2. An insert rod 23 is inserted into the interior of the fixing block 22. One end of the insert rod 23 is inserted into the interior of the through groove 24. The insert rod 23 inserted into the interior of the through groove 24 has a limiting effect on the rotating ring 25 to prevent the rotating ring 25 from rotating easily. At the same time, the insert rod 23 can not only be used to fix the rotating ring 25. When the rotating ring 25 needs to be rotated, the insert rod 23 is removed from the fixing block 22, and one end of the insert rod 23 is inserted into the through groove 24 provided in the rotating ring 25. The rotating ring 25 is twisted by the insert rod 23 to rotate, thereby driving the rotating rod 19 and the active bevel gear 20 to rotate, thereby driving the driven bevel gear 21 and the threaded rod 8 to rotate, making the rotation of the rotating ring 25 more labor-saving and convenient.

[0046] A plug-in groove is provided on the inner wall of the U-shaped plate 2, and a counterweight block 3 is placed on the inner bottom surface of the U-shaped plate 2. A plug-in block is fixedly connected to the bottom of the counterweight block 3, and the plug-in block is adapted to the plug-in groove on the inner wall of the U-shaped plate 2. Storage grooves 26 are provided on both sides of the counterweight block 3 of the U-shaped plate 2, and two grooves 31 are provided on the top surface of the counterweight block 3, and handles 32 are fixedly connected in the two grooves 31. The overall height of the counterweight block 3 is flush with the top surface of the storage groove 26, and the heights of the counterweight block 3 and the top surface of the storage groove 26 are both lower than the height of the bottom surface of the slide groove 10. The storage groove 26 can be used to place the tools required for the overall maintenance device, and the handles 32 facilitate the installer to lift the counterweight block 3.

[0047] A wind hood 51 is installed on one side of the fan 5, and a ventilation pipe 52 is installed on the side of the wind hood 51 away from the fan 5. The outer wall of the ventilation pipe 52 is provided with threads. The threads provided on the outer wall of the ventilation pipe 52 facilitate the subsequent assembly and docking of multiple ventilation pipes 52 according to the actual needs of the tunnel scene.

[0048] When installing the device, first transfer the device body and the fan 5 to the position where they need to be installed, and place the support plate 1 on the tunnel floor, then place the fan 5 on the mounting block 4, and insert the arc-shaped limiting strip 6 into the strip groove to initially limit the fan 5. At the same time, when the positioning block 12 on the fixed plate 11 is inserted into the positioning groove 13, it will squeeze the locking block 17 and squeeze it into the mounting cavity opened on both sides of the mounting block 4, and make the movable plate 15 slide and squeeze the spring 16 to make it expand and contract. Through the rebound force of the spring 16, the locking block 17 can be inserted into the slot 18 when it is aligned with the slot 18, thereby locking the positioning block 12, and the installation can be completed quickly, saving time and effort, so that the application has the effect of easy installation.

[0049] Working principle:

[0050] In the first step, when installing the device, first transfer the device body and the fan 5 to the position where they need to be installed, and place the support plate 1 on the tunnel ground, then place the fan 5 on the mounting block 4, and insert the arc-shaped limit strip 6 into the strip groove to play a preliminary limiting effect on the fan 5. At the same time, when the positioning block 12 on the fixed plate 11 is inserted into the interior of the positioning groove 13, it will squeeze the locking block 17 and squeeze it into the interior of the mounting cavity opened on both sides of the mounting block 4, and make the movable plate 15 slide and squeeze the spring 16 to make it expand and contract. Through the rebound force of the spring 16, the locking block 17 can be inserted into the interior when it is aligned with the slot 18, thereby locking the positioning block 12, and the installation can be completed quickly, saving time and effort. By rotating the rotating ring 25 to drive the active bevel gear 20 to rotate, the driven bevel gear 21 can be rotated to drive the threaded rod 8 to rotate, so that the moving block 7 drives the mounting block 4 to rise and fall, and the height of the fan 5 can be adjusted according to the needs of the air duct installation.

[0051] In the second step, when the fan 5 is installed, the counterweight 3 is placed above the U-shaped plate 2 to press the entire device to prevent the entire device from tipping over. When adjusting the height of the fan 5, the insertion rod 23 can be removed from the fixed block 22, and one end of the insertion rod 23 can be inserted into the through groove 24 provided in the rotating ring 25. The rotating ring 25 is rotated by twisting the insertion rod 23, thereby driving the rotating rod 19 and the active bevel gear 20 to rotate, thereby driving the driven bevel gear 21 and the threaded rod 8 to rotate, making the rotation of the rotating ring 25 more labor-saving and convenient.

[0052] In the third step, when the fan 5 needs to be disassembled, pull the pull rod 14, the pull rod 14 drives the movable plate 15 to slide in the installation cavity, and the movable plate 15 drives the locking block 17 to disengage from the slot 18 opened on the side wall of the positioning block 12. At this time, the positioning block 12 can be smoothly disengaged from the positioning groove 13, and then the fan 5 can be removed from the installation block 4.

[0053] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A ventilation device for tunnel construction which is easy to install, comprising a fan (5), characterized in that: The fan (5) is provided with a mounting assembly on its exterior; The installation assembly comprises an installation block (4), and a lifting assembly is arranged outside the installation block (4); Wherein, the lifting component comprises a U-shaped plate (2).

2. A ventilation device for tunnel construction that is easy to install as claimed in claim 1, characterized in that: The outer wall of the fan (5) is provided with a strip groove, and a fixing plate (11) is fixed on both the left and right sides of the fan (5), a positioning block (12) is fixedly connected to the bottom of the fixing plate (11), and a slot (18) is provided on the side wall of the positioning block (12).

3. A ventilation device for tunnel construction that is easy to install as claimed in claim 2, characterized in that: An arc-shaped groove is provided on the top of the mounting block (4), an arc-shaped limit strip (6) is fixedly connected to the inner wall of the arc-shaped groove, and the arc-shaped limit strip (6) is clamped inside the strip-shaped groove provided on the outer wall of the fan (5).

4. A ventilation device for tunnel construction that is easy to install as claimed in claim 1, characterized in that: Both sides of the mounting block (4) are provided with mounting cavities, a movable plate (15) is slidably connected to the inside of the mounting cavity, a locking block (17) is fixedly connected to one side of the movable plate (15), the locking block (17) is inserted into the inside of the slot (18), a pull rod (14) is fixedly connected to the side of the movable plate (15) away from the locking block (17), a spring (16) installed in the mounting cavity is sleeved on the outside of the pull rod (14), and a positioning groove (13) is provided on the top surface of the mounting block (4), and the positioning groove (13) is adapted to the positioning block (12).

5. A ventilation device for tunnel construction that is easy to install as claimed in claim 4, characterized in that: The locking block (17) is trapezoidal, the pull rod (14) is L-shaped, one end of the pull rod (14) passes through the mounting block (4) and extends to the outside, and the spring (16) is installed between the movable plate (15) and the inner wall of the mounting cavity.

6. A ventilation device for tunnel construction that is easy to install as claimed in claim 4, characterized in that: A support plate (1) is fixed to the bottom of the U-shaped plate (2), and a slide groove (10) is provided on the two inner side walls on the left and right of the U-shaped plate (2). A threaded rod (8) is rotatably connected to the inside of the left slide groove (10), and a moving block (7) is threadedly connected to the outside of the threaded rod (8). The moving block (7) is slidably connected to the inside of the slide groove (10), and a slider (9) is slidably connected to the inside of the right slide groove (10). The slider (9) and the moving block (7) are respectively fixed to the left and right side walls of the mounting block (4).

7. A ventilation device for tunnel construction that is easy to install as claimed in claim 6, characterized in that: The threaded rod (8) is fixedly connected to the outside with a driven bevel gear (21), a rotating rod (19) passes through one side of the U-shaped plate (2), a driving bevel gear (20) is fixedly connected to the side of the rotating rod (19) close to the driven bevel gear (21), and the driving bevel gear (20) is meshed with the driven bevel gear (21).

8. A ventilation device for tunnel construction that is easy to install as claimed in claim 7, characterized in that: A rotating ring (25) is fixedly connected to the side of the rotating rod (19) away from the active bevel gear (20), and the rotating ring (25) is provided with a through slot (24). A fixing block (22) is fixed to the side wall of the U-shaped plate (2), and an inserting rod (23) is inserted into the interior of the fixing block (22), and one end of the inserting rod (23) is inserted into the interior of the through slot (24).

9. A ventilation device for tunnel construction that is easy to install as claimed in claim 8, characterized in that: The inner wall of the U-shaped plate (2) is provided with a plug-in groove, a counterweight block (3) is placed on the inner bottom surface of the U-shaped plate (2), a plug-in block is fixedly connected to the bottom of the counterweight block (3), and the plug-in block is adapted to the plug-in groove on the inner wall of the U-shaped plate (2), the U-shaped plate (2) is provided with storage grooves (26) on both sides of the counterweight block (3), two grooves (31) are provided on the top surface of the counterweight block (3), and handles (32) are fixedly connected in the two grooves (31), and the overall height of the counterweight block (3) is flush with the top surface of the storage groove (26).

10. A ventilation device for tunnel construction that is easy to install as claimed in claim 1, characterized in that: A wind cover (51) is installed on one side of the fan (5), a ventilation pipe (52) is installed on the side of the wind cover (51) away from the fan (5), and the outer wall of the ventilation pipe (52) is provided with threads.

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