An installation base for a tunnel construction ventilator

Abstract

The present invention is applicable to the technical field of tunnel construction, and provides a tunnel construction ventilator installation base, including a base body and extension bases movably arranged at both ends of the base body, support components are installed below the base body and the extension base, and also include: an extension mechanism, the extension mechanism includes a driving component, an extension component and a rebound component, the extension component includes a connecting belt, a connecting pulley, a fixed seat, a first sliding seat, a second sliding seat, a third sliding seat, a toggle seat and a limit seat. In the tunnel construction ventilator installation base of the present invention, the extension mechanism can adjust the installation area of the installation base in real time according to the installation point of the tunnel construction ventilator in real time by cooperating with the base body and the extension base, so as to meet the installation requirements of various types of tunnel ventilators, and can realize its rapid installation, improve the practicality and convenience of the installation base, and expand the scope of application of the installation base.

Description

Technical Field

[0001] The present invention belongs to the technical field of tunnel construction, and particularly relates to an installation base for a tunnel construction ventilator. Background Art

[0002] A tunnel is an engineering structure buried in the stratum and is a form of human utilization of underground space. Tunnels can be divided into traffic tunnels, hydraulic tunnels, municipal tunnels, mine tunnels, and military tunnels. During the construction stage of a tunnel, a special ventilator needs to be erected outside the tunnel. The ventilator transports external air through a ventilation pipe into the tunnel interior, provides fresh air for the construction workers inside the tunnel, can also cool down the interior of the tunnel, ensure the personal safety of the construction workers inside the tunnel, and can also guarantee the construction progress of the tunnel.

[0003] Usually, a tunnel construction ventilator is directly fixed and installed on the installation base through bolts. The installation base is fixed to the outside of the tunnel by means of bricklaying or concrete pouring. Most of the existing installation bases are steel structures welded by I-beams. The bottom of the tunnel construction ventilator is fixed to the steel structure installation base, thereby realizing the fixation of the tunnel ventilator.

[0004] Due to the different specifications of the construction tunnels, the types of tunnel construction ventilators are also different. The installation points of different types of tunnel construction ventilators are not the same, and the required installation areas of their installation bases are also different. The existing installation bases need to weld the I-beams on-site according to the installation points of the tunnel construction ventilators to ensure that the installation area of the installation base meets the installation point requirements of the tunnel construction ventilators. This not only consumes a large amount of production time and production costs, but also one type of installation base can only be applicable to the installation requirements of a certain type of tunnel construction ventilator, resulting in great limitations of the installation base in actual use.

[0005] Therefore, in view of the above situation, there is an urgent need to develop an installation base for a tunnel construction ventilator to overcome the deficiencies in current practical applications. Summary of the Invention

[0006] Aiming at the deficiencies of the existing technology, the purpose of the embodiment of the present invention is to provide an installation base for a tunnel construction ventilator to solve the problems in the above background art.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] An installation base for a tunnel construction ventilator, comprising a base body and extension bases movably arranged at both ends of the base body. A support assembly is installed below the base body and the extension bases, and further includes:

[0009] An extension mechanism, the extension mechanism includes a driving component, an extension component and a resilient component, the driving component includes a driving component, a transmission module and a rotating seat, the driving component is installed in the base body, the output end of the driving component is connected to the rotating seat through the transmission module, and the rotating seat and the extension component are symmetrically arranged at both ends of the base body;

[0010] The extension assembly includes a connecting belt, a connecting pulley, a fixed seat, a first sliding seat, a second sliding seat, a third sliding seat, a toggle seat and a limiting seat, one end of the connecting belt is wound around the rotating seat, the other end of the connecting belt passes through the connecting pulleys installed on the fixed seat, the first sliding seat and the second sliding seat in sequence, and the other end of the connecting belt is fixed to the third sliding seat, the fixed seat is symmetrically and fixedly installed at both ends of the base body, the rotating seat is movably installed on the fixed seat, the first sliding seat is slidably connected to the side wall of the fixed seat, the second sliding seat is slidably connected to the side wall of the first sliding seat, the third sliding seat is slidably connected to the side wall of the second sliding seat, and one end of the third sliding seat is fixedly connected to the extension base, and the two ends of the resilient member are respectively connected to the third sliding seats symmetrically installed at both ends;

[0011] The toggle seat is sequentially mounted on the third sliding seat, the second sliding seat and the first sliding seat, the limit seat is sequentially mounted on the second sliding seat, the first sliding seat and the fixed seat, and the toggle seat cooperates with the limit seat;

[0012] In the initial state, the extended bases at both ends conflict with the two ends of the base body. When the installation area of the installation base needs to be adjusted, the driving member drives the rotating seat to rotate through the transmission module, and the rotating seat releases the connecting belt by rotation, and the rebound member drives the two groups of third sliding seats to slide on the second sliding seat in opposite directions through its own elastic force. When the toggle seat on the third sliding seat conflicts with the limit seat on the second sliding seat, the two groups of third sliding seats drive the two groups of second sliding seats to slide on the first sliding seat in opposite directions, and the two groups of second sliding seats drive the two groups of first sliding seats to slide on the fixed seat in opposite directions. The first sliding seat, the second sliding seat and the third sliding seat realize the extension of the extended base by sliding, and the extended base realizes the adjustment of the installation area of the installation base by extension.

[0013] As a further technical solution of the present invention, the support assembly is distributed below the base body and the extended base, and the support assembly includes a fixed support seat, a movable support seat, an auxiliary support seat and a connecting support seat. The fixed support seat is fixed below the base body, and the fixed support seat is connected to the movable support seat, the auxiliary support seat and the connecting support seat in sequence through an extension mechanism, and the connecting support seat is fixed below the extended base.

[0014] As a further technical solution of the present invention, the stretching mechanism includes a stretching component and a lifting component. The stretching component is respectively installed on the fixed support base, the movable support base, the auxiliary support base and the connecting support base. There are two groups of the lifting components, and the two groups of the lifting components are respectively installed on the two movable support bases, and both ends of the lifting component are respectively movably connected to the adjacent fixed support base, auxiliary support base and connecting support base.

[0015] As a further technical solution of the present invention, the stretching component includes a first connecting piece, a second connecting piece, a first gear, a second gear, a third connecting piece and a fourth connecting piece. Both ends of the first connecting piece are respectively movably installed on the connecting support base and the adjacent movable support base. One end of the second connecting piece is movably installed on the movable support base, and the other end of the second connecting piece is movably installed on the auxiliary support base through the first gear. The first gear is meshed and connected with the second gear, the second gear is fixedly connected with one end of the third connecting piece, the other end of the third connecting piece is movably installed on the movable support base, and both ends of the fourth connecting piece are respectively movably installed on the fixed support base and the adjacent movable support base.

[0016] As a further technical solution of the present invention, the lifting component includes a fifth connecting piece, a sixth connecting piece and a seventh connecting piece. One end of the fifth connecting piece is respectively movably installed on the connecting support base and the auxiliary support base. One end of the seventh connecting piece is respectively movably installed on the fixed support base and the auxiliary support base. The other ends of the fifth connecting piece and the seventh connecting piece are both movably connected to the adjacent movable support base through the sixth connecting piece.

[0017] As a further technical solution of the present invention, elastic support components are installed between the auxiliary support base and the fixed support base and between the auxiliary support base and the connecting support base. One end of the elastic support component is respectively movably abutted against the bottom of the base body and the extended base.

[0018] As a further technical solution of the present invention, the elastic support component includes a first mounting piece, a second mounting piece, a mounting seat, an elastic member and a support plate. One end of the first mounting piece is respectively installed on the fixed support base and the connecting support base. The other end of the first mounting piece is connected to the second mounting piece. The second mounting piece is movably installed on the auxiliary support base. The side walls at both ends of the mounting seat are installed at the connection of the first mounting piece and the second mounting piece. The elastic members are distributed on the mounting seat. A support plate is installed on the elastic member. One end of the support plate is respectively movably abutted against the bottom of the base body and the extended base.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] In the initial state, the extended bases at both ends are in conflict with the two ends of the base body. When it is necessary to adjust the installation area of the installation base according to the installation point of the tunnel construction ventilator, the driving member drives the rotating seat to rotate through the transmission module, and the rotating seat releases the connecting belt by rotating. At this time, the rebound member drives the two groups of third sliding seats to slide in opposite directions on the second sliding seat through its own elastic force, and the third sliding seat drives the two groups of extended bases to move in opposite directions. The two groups of extended bases move in opposite directions, thereby adjusting the installation area of the installation base in the first stage;

[0021] When the moving stroke of the third sliding seat cannot meet the installation point of the tunnel construction ventilator, the third sliding seat continues to move, and when the toggle seat on the third sliding seat conflicts with the limiting seat on the second sliding seat, the two groups of third sliding seats drive the two groups of second sliding seats to slide on the first sliding seat in opposite directions, and the second sliding seat increases the moving stroke of the third sliding seat by sliding in opposite directions, thereby realizing the second stage adjustment of the installation area of the installation base, and when the toggle seat on the second sliding seat conflicts with the limiting seat on the first sliding seat, the two groups of second sliding seats drive the two groups of first sliding seats to slide on the fixed seat in opposite directions, further increasing the moving stroke of the third sliding seat, thereby realizing the third stage adjustment of the installation area of the installation base, so that the installation base can adjust the installation area of the installation base in real time according to the installation point of the tunnel construction ventilator, meet the installation requirements of various types of tunnel ventilators, and realize its rapid installation, improve the practicability and convenience of the installation base, and expand the application scope of the installation base.

[0022] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic structural diagram of one side of a tunnel construction ventilator mounting base provided in an embodiment of the present invention.

[0024] Figure 2 This is a schematic structural diagram of the other side of the tunnel construction ventilator mounting base provided by an embodiment of the present invention.

[0025] Figure 3 for Figure 1 Top view of the structure.

[0026] Figure 4 for Figure 2 Schematic diagram of the structure of the middle support assembly and extension mechanism.

[0027] Figure 5 for Figure 2 Schematic diagram of the structure of the elastic support component.

[0028] Figure numerals: 1-base body, 2-extension base, 3-extension mechanism, 31-driving assembly, 311-driving member, 312-transmission module, 313-rotating seat, 32-extension assembly, 321-connecting belt, 322-connecting pulley, 323-fixed seat, 324-first sliding seat, 325-second sliding seat, 326-third sliding seat, 327-sliding seat, 328-limiting seat, 33-rebound member, 4-support assembly, 41-fixed support seat, 42-movable support seat, 43- Auxiliary support seat, 44-connecting support seat, 5-extension mechanism, 51-extension assembly, 511-first connecting piece, 512-second connecting piece, 513-first gear, 514-second gear, 515-third connecting piece, 516-fourth connecting piece, 52-lifting assembly, 521-fifth connecting piece, 522-sixth connecting piece, 523-seventh connecting piece, 6-elastic support assembly, 61-first mounting piece, 62-second mounting piece, 63-mounting seat, 64-elastic piece, 65-support plate. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0031] like Figures 1 to 3 As shown, as an embodiment of the present invention, a tunnel construction ventilator installation base is provided, comprising a base body 1 and extended bases 2 movably arranged at both ends of the base body 1, a support assembly 4 is installed below the base body 1 and the extended base 2, and further comprising:

[0032] The extension mechanism 3 includes a driving assembly 31, an extension assembly 32 and a resilient member 33. The driving assembly 31 includes a driving member 311, a transmission module 312 and a rotating seat 313. The driving member 311 is installed in the base body 1. The output end of the driving member 311 is connected to the rotating seat 313 through the transmission module 312. The rotating seat 313 and the extension assembly 32 are symmetrically arranged at both ends of the base body 1.

[0033] The extension assembly 32 includes a connecting belt 321, a connecting pulley 322, a fixed seat 323, a first sliding seat 324, a second sliding seat 325, a third sliding seat 326, a toggle seat 327 and a limit seat 328. One end of the connecting belt 321 is wound around the rotating seat 313, and the other end of the connecting belt 321 passes through the connecting pulley 322 installed on the fixed seat 323, the first sliding seat 324 and the second sliding seat 325 in sequence, and the other end of the connecting belt 321 is fixed to the third sliding seat 326. The fixed seat 323 is symmetrically and fixedly installed at both ends of the base body 1, the rotating seat 313 is movably installed on the fixed seat 323, the first sliding seat 324 is slidably connected to the side wall of the fixed seat 323, the second sliding seat 325 is slidably connected to the side wall of the first sliding seat 324, the third sliding seat 326 is slidably connected to the side wall of the second sliding seat 325, and one end of the third sliding seat 326 is fixedly connected to the extension base 2, and both ends of the resilient member 33 are respectively connected to the third sliding seats 326 symmetrically installed at both ends;

[0034] The toggle seat 327 is sequentially mounted on the third sliding seat 326, the second sliding seat 325 and the first sliding seat 324, and the limit seat 328 is sequentially mounted on the second sliding seat 325, the first sliding seat 324 and the fixed seat 323, and the toggle seat 327 cooperates with the limit seat 328;

[0035] In the initial state, the extended bases 2 at both ends are in conflict with the two ends of the base body 1. When the installation area of the installation base needs to be adjusted, the driving member 311 drives the rotating seat 313 to rotate through the transmission module 312, and the rotating seat 313 releases the connecting belt 321 by rotating. The resilient member 33 drives the two groups of third sliding seats 326 to slide on the second sliding seat 325 in opposite directions through its own elastic force. When the toggle seat 327 on the third sliding seat 326 conflicts with the limit seat 328 on the second sliding seat 325, the two groups of third sliding seats 326 drive the two groups of second sliding seats 325 to slide on the first sliding seat 324 in opposite directions, and the two groups of second sliding seats 325 drive the two groups of first sliding seats 324 to slide on the fixed seat 323 in opposite directions. The first sliding seat 324, the second sliding seat 325 and the third sliding seat 326 extend the extended base 2 by sliding, and the extended base 2 adjusts the installation area of the installation base by extending.

[0036] In this embodiment, the extension mechanism 3 can cooperate with the base body 1 and the extension base 2 to adjust the installation area of the installation base in real time according to the installation point of the tunnel construction ventilator, meet the installation requirements of various types of tunnel ventilators, and can achieve rapid installation, thereby improving the practicality and convenience of the installation base and expanding the scope of application of the installation base.

[0037] In a preferred embodiment, the driving member 311 preferably employs a motor that can rotate forward and backward;

[0038] The transmission module 312 preferably employs a belt drive structure;

[0039] The resilient member 33 preferably employs a spring that meets the conditions.

[0040] As Figure 2 and Figure 4 shown, as a preferred embodiment of the present invention, the support assembly 4 is distributed below the base body 1 and the extended base 2. The support assembly 4 includes a fixed support seat 41, a movable support seat 42, an auxiliary support seat 43, and a connecting support seat 44. The fixed support seat 41 is fixed below the base body 1. The fixed support seat 41 is successively connected to the movable support seat 42, the auxiliary support seat 43, and the connecting support seat 44 through an extension mechanism 5. The connecting support seat 44 is fixed below the extended base 2.

[0041] As Figure 4 shown, as a preferred embodiment of the present invention, the extension mechanism 5 includes an extension assembly 51 and a lifting assembly 52. The extension assembly 51 is respectively installed on the fixed support seat 41, the movable support seat 42, the auxiliary support seat 43, and the connecting support seat 44. There are two groups of the lifting assembly 52. The two groups of the lifting assembly 52 are respectively installed on the two movable support seats 42. And both ends of the lifting assembly 52 are movably connected to the adjacent fixed support seat 41, auxiliary support seat 43, and connecting support seat 44.

[0042] As Figure 4 shown, as a preferred embodiment of the present invention, the extension assembly 51 includes a first connecting member 511, a second connecting member 512, a first gear 513, a second gear 514, a third connecting member 515, and a fourth connecting member 516. Both ends of the first connecting member 511 are respectively movably installed on the connecting support seat 44 and the adjacent movable support seat 42. One end of the second connecting member 512 is movably installed on the support seat 42. The other end of the second connecting member 512 is movably installed on the auxiliary support seat 43 through the first gear 513. The first gear 513 is meshed and connected with the second gear 514. The second gear 514 is fixedly connected to one end of the third connecting member 515. The other end of the third connecting member 515 is movably installed on the movable support seat 42. Both ends of the fourth connecting member 516 are respectively movably installed on the fixed support seat 41 and the adjacent movable support seat 42.

[0043] As Figure 4As shown, as a preferred embodiment of the present invention, the lifting assembly 52 includes a fifth connecting member 521, a sixth connecting member 522, and a seventh connecting member 523. One end of the fifth connecting member 521 is movably installed on the connecting support base 44 and the auxiliary support base 43 respectively. One end of the seventh connecting member 523 is movably installed on the fixed support base 41 and the auxiliary support base 43 respectively. The other ends of the fifth connecting member 521 and the seventh connecting member 523 are both movably connected to the adjacent movable support base 42 through the sixth connecting member 522.

[0044] In this embodiment, when the extension base 2 performs an extension movement, the extension base 2 drives the connecting support base 44 to move. While the connecting support base 44 drives a group of movable support bases 42 to move horizontally through the first connecting member 511, the connecting support base 44 also drives the fifth connecting member 521 to move. The fifth connecting member 521 drives a group of movable support bases 42 to move vertically by cooperating with the sixth connecting member 522 and the seventh connecting member 523. A group of movable support bases 42 drive the second connecting member 512 to rotate by moving vertically. The second connecting member 512 drives the first gear 513 to rotate. The first gear 513 drives the third connecting member 515 to rotate through the second gear 514. The third connecting member 515 drives another group of movable support bases 42 to move horizontally and vertically by cooperating with a group of lifting assemblies 52. The two groups of movable support bases 42 drive the connecting support base 44 and the auxiliary support base 43 to move horizontally along with the extension base 2, thereby realizing the support for the extension base 2, improving the installation stability of the tunnel ventilator, and further improving the practicability of the installation base.

[0045] In a preferred embodiment, the first connecting member 511, the second connecting member 512, the third connecting member 515, the fourth connecting member 516, the fifth connecting member 521, the sixth connecting member 522, and the seventh connecting member 523 all preferably adopt a columnar structure.

[0046] As Figure 2 and Figure 5 shown, as a preferred embodiment of the present invention, an elastic support assembly 6 is installed between the auxiliary support base 43 and the fixed support base 41 and between the auxiliary support base 43 and the connecting support base 44. One end of the elastic support assembly 6 is movably abutted against the bottom of the base body 1 and the extension base 2 respectively.

[0047] As Figure 2 and Figure 5As shown in the figure, as a preferred embodiment of the present invention, the elastic support assembly 6 includes a first mounting member 61, a second mounting member 62, a mounting seat 63, an elastic member 64, and a support plate 65. One end of the first mounting member 61 is respectively mounted on the fixed support seat 41 and the connecting support seat 44. The other end of the first mounting member 61 is connected to the second mounting member 62. The second mounting member 62 is movably mounted on the auxiliary support seat 43. The side walls at both ends of the mounting seat 63 are mounted at the connection of the first mounting member 61 and the second mounting member 62. The elastic members 64 are distributed on the mounting seat 63. The elastic member 64 is provided with a support plate 65. One end of the support plate 65 is respectively in movable contact with the bottom of the base body 1 and the extended base 2.

[0048] In this embodiment, in the initial state, the support plate 65 is not in contact with the bottom of the base body 1 and the extended base 2. Under the cooperation of the extension mechanism 3 and the stretching mechanism 5, the distances between the auxiliary support seat 43 and the fixed support seat 41 and between the auxiliary support seat 43 and the connecting support seat 44 are both increasing continuously, causing the first mounting member 61 and the second mounting member 62 to rotate relative to each other. The first mounting member 61 and the second mounting member 62 drive the mounting seat 63 to move toward the base body 1 by means of relative rotation. The mounting seat 63 drives the support plate 65 to move toward the base body 1 through the elastic member 64. The support plate 65 realizes elastic support for the bottoms of the base body 1 and the extended base 2 by cooperating with the elastic member 64. And the elastic member 64 is an elastic damper, so that while the elastic support assembly 6 elastically supports the bottoms of the base body 1 and the extended base 2, it can also weaken the vibration generated when the tunnel ventilator is working, improve the installation stability of the tunnel ventilator, and improve the practicability and service life of the installation base.

[0049] In a preferred embodiment, the first mounting member 61 and the second mounting member 62 are both preferably of a columnar structure.

[0050] The working principle of the present invention is:

[0051] In the initial state, the two extended bases 2 at both ends are in contact with the two ends of the base body 1. When it is necessary to adjust the installation area of the installation base according to the installation position of the tunnel construction ventilator, the driving member 311 drives the rotating seat 313 to rotate through the transmission module 312. The rotating seat 313 releases the connecting belt 321 by rotating. At this time, the resilient member 33 drives the two third sliding seats 326 to slide in opposite directions on the second sliding seat 325 through its own elastic force. The third sliding seat 326 drives the two extended bases 2 to move in opposite directions. The two extended bases 2 adjust the installation area of the installation base in the first stage by moving in opposite directions.

[0052] When the moving stroke of the third sliding seat 326 cannot meet the installation point of the tunnel construction ventilator, the third sliding seat 326 continues to move. When the toggle seat 327 on the third sliding seat 326 conflicts with the limit seat 328 on the second sliding seat 325, the two groups of third sliding seats 326 drive the two groups of second sliding seats 325 to slide in opposite directions on the first sliding seat 324. The second sliding seat 325 increases the moving stroke of the third sliding seat 326 by sliding in opposite directions, thereby realizing the second stage of adjustment of the installation area of the installation base. When the toggle seat 327 on the second sliding seat 325 conflicts with the limit seat 328 on the first sliding seat 324, the two groups of second sliding seats 325 drive the two groups of first sliding seats 324 to slide in opposite directions on the fixed seat 323, further increasing the movement stroke of the third sliding seat 325, thereby achieving the third stage of adjustment of the installation area of the installation base, so that the installation base can adjust the installation area of the installation base in real time according to the installation point of the tunnel construction ventilator, meet the installation requirements of various types of tunnel ventilators, and achieve rapid installation thereof;

[0053] The above is the working principle of the tunnel construction ventilator mounting base.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A ventilation fan installation base for tunnel construction, comprising a base body and extending bases movably arranged at both ends of the base body, and a support assembly is installed below the base body and the extending bases, characterized in that, Also includes: An extension mechanism, the extension mechanism includes a driving component, an extension component and a resilient component, the driving component includes a driving component, a transmission module and a rotating seat, the driving component is installed in the base body, the output end of the driving component is connected to the rotating seat through the transmission module, and the rotating seat and the extension component are symmetrically arranged at both ends of the base body; The extension assembly includes a connecting belt, a connecting pulley, a fixed seat, a first sliding seat, a second sliding seat, a third sliding seat, a toggle seat and a limiting seat, one end of the connecting belt is wound around the rotating seat, the other end of the connecting belt passes through the connecting pulleys installed on the fixed seat, the first sliding seat and the second sliding seat in sequence, and the other end of the connecting belt is fixed to the third sliding seat, the fixed seat is symmetrically and fixedly installed at both ends of the base body, the rotating seat is movably installed on the fixed seat, the first sliding seat is slidably connected to the side wall of the fixed seat, the second sliding seat is slidably connected to the side wall of the first sliding seat, the third sliding seat is slidably connected to the side wall of the second sliding seat, and one end of the third sliding seat is fixedly connected to the extension base, and the two ends of the resilient member are respectively connected to the third sliding seats symmetrically installed at both ends; The toggle seat is sequentially mounted on the third sliding seat, the second sliding seat and the first sliding seat, the limit seat is sequentially mounted on the second sliding seat, the first sliding seat and the fixed seat, and the toggle seat cooperates with the limit seat; In the initial state, the extended bases at both ends conflict with the two ends of the base body. When the installation area of the installation base needs to be adjusted, the driving member drives the rotating seat to rotate through the transmission module, and the rotating seat releases the connecting belt by rotating, and the rebound member drives the two groups of third sliding seats to slide on the second sliding seat in opposite directions through its own elastic force. When the toggle seat on the third sliding seat conflicts with the limiting seat on the second sliding seat, the two groups of third sliding seats drive the two groups of second sliding seats to slide on the first sliding seat in opposite directions, and the two groups of second sliding seats drive the two groups of first sliding seats to slide on the fixed seat in opposite directions. The first sliding seat, the second sliding seat and the third sliding seat realize the extension of the extended base by sliding, and the extended base realizes the adjustment of the installation area of the installation base by extending; The support assembly is distributed below the base body and the extended base, and the support assembly includes a fixed support seat, a movable support seat, an auxiliary support seat and a connecting support seat. The fixed support seat is fixed below the base body, and the fixed support seat is connected with the movable support seat, the auxiliary support seat and the connecting support seat in sequence through a stretching mechanism. The connecting support seat is fixed below the extended base; The stretching mechanism includes a stretching component and a lifting component, the stretching component is respectively mounted on a fixed support seat, a movable support seat, an auxiliary support seat and a connecting support seat, and the lifting component is provided with two groups, the two groups of lifting components are respectively mounted on two groups of movable support seats, and the two ends of the lifting component are respectively movably connected to the adjacent fixed support seat, the auxiliary support seat and the connecting support seat; The stretching assembly includes a first connecting member, a second connecting member, a first gear, a second gear, a third connecting member, and a fourth connecting member. Two ends of the first connecting member are respectively movably installed on a connecting support base and an adjacent movable support base. One end of the second connecting member is movably installed on the movable support base. The other end of the second connecting member is movably installed on an auxiliary support base through the first gear. The first gear is meshed and connected with the second gear. The second gear is fixedly connected with one end of the third connecting member. The other end of the third connecting member is movably installed on the movable support base. Two ends of the fourth connecting member are respectively movably installed on a fixed support base and an adjacent movable support base; The lifting assembly includes a fifth connecting member, a sixth connecting member, and a seventh connecting member. One end of the fifth connecting member is respectively movably installed on the connecting support base and the auxiliary support base. One end of the seventh connecting member is respectively movably installed on the fixed support base and the auxiliary support base. The other ends of the fifth connecting member and the seventh connecting member are both movably connected to an adjacent movable support base through the sixth connecting member.

2. The installation base of the tunnel construction ventilator according to claim 1, characterized in that Elastic support assemblies are installed between the auxiliary support base and the fixed support base and between the auxiliary support base and the connecting support base. One ends of the elastic support assemblies are respectively in movable contact with the bottom of the base body and the extended base.

3. The installation base of the tunnel construction ventilator according to claim 2, characterized in that, The elastic support assembly includes a first mounting member, a second mounting member, a mounting seat, an elastic member, and a support plate. One end of the first mounting member is respectively installed on the fixed support base and the connecting support base. The other end of the first mounting member is connected to the second mounting member. The second mounting member is movably installed on the auxiliary support base. Side walls at two ends of the mounting seat are both installed at the connection of the first mounting member and the second mounting member. The elastic members are distributed on the mounting seat. The support plate is installed on the elastic member. One end of the support plate is respectively in movable contact with the bottom of the base body and the extended base.

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