Compression-resistant door frame structure, underground roadway air door and mounting method

Abstract

The invention provides a compression-resistant door frame structure, an underground roadway air door and an installation method, and relates to the technical field of coal mine underground roadway air doors. The compression-resistant door frame structure comprises a movable frame, an air door frame and a deformation-resistant structure; the air door frame is located in the first mounting cavity and movably connected with the guide groove in the depth direction of the guide groove, and a movable area is defined between the outer peripheral wall of the air door frame and the inner peripheral wall of the guide groove; the anti-deformation structure is mounted in the movable area, has a first critical state and a second critical state, and can be switched from the first critical state to the second critical state to generate elastic deformation when the movable door frame moves relative to the air door frame; the anti-deformation structure can be switched from the second critical state to the first critical state to rebound so as to drive the movable frame and the air door frame to reset. The device can deform when being subjected to external pressure, can automatically recover to the initial shape when the external pressure is released, and is good in structural stability.

Description

Technical Field

[0001] The invention relates to the technical field of air doors for underground mine tunnels, and in particular to a pressure-resistant door frame structure, an underground mine tunnel air door and an installation method. Background Art

[0002] The underground tunnel damper is the most basic and critical facility in the underground ventilation system of coal mines. During the coal mining process, the underground tunnel damper is affected by underground mining activities and mine pressure, and its door frame is often crushed and deformed, resulting in the damper being unable to open normally. Therefore, in order to ensure the normal use of the damper, the relevant technology often adopts the method of renovating and maintaining the tunnel near the damper installation location, or replacing the damper window to ensure the smooth operation of the coal mine. However, the underground tunnel damper in the aforementioned method not only lacks structural stability, but also the frequent maintenance or replacement of the damper greatly increases the investment of mine personnel and expenses, and also affects the efficiency of underground mining. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of one aspect of the present invention provides a pressure-resistant door frame structure, which can deform when subjected to external pressure and automatically restore its original shape when the external pressure is released, and has good structural stability.

[0005] Another aspect of the present invention provides an underground tunnel damper.

[0006] Another embodiment of the present invention provides a method for installing an underground tunnel damper.

[0007] According to an embodiment of the present invention, a pressure-resistant door frame structure includes a movable frame, a damper door frame and an anti-deformation structure, wherein the movable frame is formed around a first installation cavity and has a guide groove, the damper door frame is located in the first installation cavity and is movably connected to the guide groove along the depth direction of the guide groove, and an active area is defined between the outer peripheral wall of the damper door frame and the inner peripheral wall of the guide groove; the anti-deformation structure is installed in the active area and has a first critical state and a second critical state, the anti-deformation structure can switch from the first critical state to the second critical state to undergo elastic deformation when the movable door frame moves relative to the damper door frame, and the anti-deformation structure can switch from the second critical state to the first critical state and rebound to drive the movable frame and the damper door frame to reset.

[0008] According to the pressure-resistant door frame structure of the embodiment of the present invention, a movable frame, an anti-deformation structure and a damper door frame cooperate to form a retractable door frame structure, wherein when the movable frame is subjected to external pressure, the movable frame will squeeze the anti-deformation structure to move relative to the damper door frame, so that the door frame structure as a whole is deformed, thereby overcoming and offsetting the squeezing of the door frame structure by the external pressure, and when the external pressure is released, the elastic restoring force of the anti-deformation structure will push the movable frame and the damper door frame to move toward each other, so as to restore the two to their initial positions. At this time, the door frame structure automatically returns to its original state. Therefore, compared with the related art, the present invention can be deformed when subjected to external pressure, and can automatically restore its original shape when the external pressure is released, and has good structural stability.

[0009] In some embodiments, the anti-deformation structure includes an elastic body, which is hollow tubular and extends along the length direction of the guide groove.

[0010] In some embodiments, the cross-section of the elastic body may be one of an elliptical ring, a circular ring, a polygonal ring, and any closed curve ring.

[0011] In some embodiments, the anti-deformation structure further includes a supporting rib, wherein the supporting rib is connected to the elastic body, and a portion of the supporting rib facing away from the elastic body is pressed against an inner peripheral wall of the active area.

[0012] In some embodiments, there are a plurality of the support ribs, and the plurality of the support ribs are arranged at intervals along the circumference of the elastic body and extend along the length direction of the guide groove.

[0013] In some embodiments, the pressure-resistant door frame structure further includes a sealing material, and the sealing material is filled between the anti-deformation structure and the active area to seal the door frame structure.

[0014] In some embodiments, the sealing material is one of a soft foam material and a sealing strip.

[0015] In some embodiments, the movable frame and the damper door frame may both include a crossbeam and a column, the crossbeam extends along a first direction, the column extends along a height direction, and the first direction is perpendicular to the height direction;

[0016] The guide groove includes a first guide section and a second guide section, the crossbeam of the movable frame is provided with the first guide section, the column of the movable frame is provided with the second guide section, the crossbeam of the damper door frame is slidably connected to the first guide section along the height direction, and the column of the damper door frame is slidably connected to the second guide section along the first direction.

[0017] In some embodiments, the cross beams and columns of the damper door frame are both hollow tubular.

[0018] In some embodiments, the elastic body includes a first elastic portion and a second elastic portion, the first elastic portion is clamped between a crossbeam of the movable frame and a crossbeam of the damper door frame and extends along the first direction, and the second elastic portion is clamped between a column of the movable frame and a column of the damper door frame and extends along the height direction.

[0019] In some embodiments, the pressure-resistant door frame structure further includes a limiting member, and the movable frame is connected to the damper door frame via the limiting member to limit the movable frame and the damper door frame when the movable frame moves relative to the damper door frame.

[0020] In some embodiments, the limiting member is a tension bolt.

[0021] According to an embodiment of the present invention, an underground tunnel damper includes a door frame structure and a damper door leaf, wherein the door frame structure is the door frame structure described in any of the above embodiments, wherein a movable frame in the door frame structure is closer to the tunnel surrounding rock than the damper door frame, wherein the movable frame is suitable for being connected to the tunnel surrounding rock, and wherein the damper door frame is formed with a second installation cavity therearound; wherein the damper door leaf is movably connected to the damper door frame and is capable of opening and closing the second installation cavity.

[0022] According to the underground tunnel damper of the embodiment of the present invention, by adopting a pressure-resistant door frame structure, the underground tunnel damper can automatically expand and contract when affected by underground mining activities or ore pressure to adapt to the deformation of the tunnel surrounding rock, reduce the risk of damage to the damper due to mine pressure, and maintain the structural stability of the damper. Therefore, compared with the related art, the underground tunnel damper in the present invention does not require frequent overhaul and maintenance, reduces the number of replacements, reduces the investment in mine personnel and expenses, and also ensures the efficiency of underground mining.

[0023] In some embodiments, the underground tunnel damper also includes an environmental monitoring system, which is installed on any one of the door frame structure and the damper door leaf, and is used to monitor at least one parameter information of temperature, humidity and pressure in the environment surrounding the damper.

[0024] In some embodiments, the underground tunnel damper also includes an alarm device, which has at least one alarm mode of sound alarm and light signal alarm to provide early warning of abnormal conditions of the damper.

[0025] In some embodiments, the underground tunnel air door further includes a tunnel wall, the tunnel wall has a third installation cavity, and the movable frame is connected to the tunnel wall and is located in the third installation cavity;

[0026] A buffer zone is defined between the outer peripheral wall of the tunnel wall and the inner peripheral wall of the tunnel surrounding rock, and the buffer zone is filled with buffer material so that the damper can resist external pressure.

[0027] In some embodiments, at least one of the movable frame, the damper door frame and the damper door leaf is provided with an anti-corrosion coating;

[0028] Alternatively, at least one of the movable frame, the damper door frame and the damper door leaf is made of anti-corrosion material.

[0029] A method for installing an underground tunnel damper according to an embodiment of the present invention comprises the following steps:

[0030] Construct the wind gate foundation in the surrounding rock of the tunnel to form a structure;

[0031] The anti-deformation structure is installed in the guide groove of the movable frame, the movable frame and the damper door frame are assembled to obtain a door frame structure, the door frame structure is installed in the structure, and the damper door leaf is assembled on the door frame structure to complete the installation of the underground tunnel damper.

[0032] The technical advantages of the installation method of the underground tunnel air door according to the embodiment of the present invention are the same as the technical advantages of the underground tunnel air door mentioned above, and will not be repeated here.

[0033] In some embodiments, before the step of constructing a damper foundation in the tunnel surrounding rock to form a structure, the method also includes cleaning and repairing the underground tunnel to ensure that the tunnel top and sides are intact, the support is complete, and the concentrated stress area and dynamic pressure area are avoided.

[0034] In some embodiments, the step of constructing a damper foundation in the surrounding rock of the tunnel to form a structure includes:

[0035] Building foundation, wall and vault in the cutout of the tunnel surrounding rock wall to obtain the tunnel wall, wherein the outer peripheral wall of the tunnel wall is separated from the inner peripheral wall of the tunnel surrounding rock to form a buffer zone;

[0036] The buffer area is filled with buffer material to form a buffer zone, thereby completing the construction of the structure.

[0037] In some embodiments, the door frame structure is embedded in the tunnel wall to a depth of not less than 100 mm, and the door frame structure is exposed outside the tunnel wall to a width of not less than 150 mm.

[0038] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a schematic structural diagram of a pressure-resistant door frame structure according to an embodiment of the present invention.

[0040] Figure 2 It is a cross-sectional view of the connection structure of the movable frame, the damper door frame and the anti-deformation structure part in the pressure-resistant door frame structure according to an embodiment of the present invention.

[0041] Figure 3 Schematic diagram of the structure of an underground tunnel air door according to an embodiment of the present invention.

[0042] Figure 4 It is a flow chart of a method for installing an underground tunnel damper according to an embodiment of the present invention.

[0043] Figure 5 It is a flow chart of a method for installing an underground tunnel damper according to another embodiment of the present invention.

[0044] Figure 6 It is a schematic diagram of the process of constructing a damper foundation in the surrounding rock of a tunnel to form a structure in a method for installing a damper in an underground tunnel according to an embodiment of the present invention.

[0045] Figure numerals: 1. movable frame, 11. guide groove, 12. movable area, 13. crossbeam, 14. column, 2. damper door frame, 3. anti-deformation structure, 31. elastic body, 32. supporting ribs, 4. sealing material, 5. damper door leaf. DETAILED DESCRIPTION

[0046] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0047] like Figure 1 and Figure 2 As shown, a pressure-resistant door frame structure of an embodiment of the present invention includes a movable frame 1, a damper door frame 2 and an anti-deformation structure 3, the movable frame 1 is formed with a first installation cavity around it and has a guide groove 11, the damper door frame 2 is located in the first installation cavity (that is, the damper door frame 2 is located on the inner peripheral side of the movable frame 1) and is movably connected to the guide groove 11 along the depth direction of the guide groove 11 (that is, the groove depth direction of the guide groove 11), and an active area 12 is defined between the outer peripheral wall of the damper door frame 2 and the inner peripheral wall of the guide groove 11; the anti-deformation structure 3 is installed in the active area 12 and has a first critical state and a second critical state, the anti-deformation structure 3 can switch from the first critical state to the second critical state to elastically deform when the movable door frame moves relative to the damper door frame 2, and the anti-deformation structure 3 can switch from the second critical state to the first critical state to rebound to drive the movable frame 1 and the damper door frame 2 to reset.

[0048] It can be understood that the pressure-resistant door frame structure according to the embodiment of the present invention is formed by the cooperation of the movable frame 1, the anti-deformation structure 3 and the damper door frame 2 to form a retractable door frame structure, wherein when the movable frame 1 is subjected to external pressure, the movable frame 1 will squeeze the anti-deformation structure 3 to move relative to the damper door frame 2, so that the door frame structure as a whole is deformed, thereby overcoming and offsetting the squeezing of the door frame structure by the external pressure, and when the external pressure is released, the elastic restoring force of the anti-deformation structure 3 will push the movable frame 1 and the damper door frame 2 to move toward each other to restore the two to their initial positions. At this time, the door frame structure automatically returns to its original state. Therefore, compared with the related art, the present invention can be deformed when subjected to external pressure, and can automatically restore its original shape when the external pressure is released, and has good structural stability.

[0049] like Figure 2 As shown, in some embodiments, the anti-deformation structure 3 includes an elastic body 31 , which is hollow tubular and extends along the length direction of the guide groove 11 .

[0050] It is understandable that the anti-deformation structure 3 adopts a hollow tubular elastic body 31, which has better elastic performance, so that the door frame structure can be better deformed when subjected to external pressure and maintain the stability of the overall structure.

[0051] Specifically, the elastic body 31 is a tubular structure with high resilience to better adapt to external pressure. The cross section of the elastic body 31 can be one of an elliptical ring, a circular ring, a polygonal ring and any closed curve ring. Among them, the cross section of the elastic body 31 is preferably an elliptical ring.

[0052] like Figure 2 As shown, in some embodiments, the anti-deformation structure 3 further includes a support rib 32 , which is connected to the elastic body 31 , and a portion of the support rib 32 away from the elastic body 31 is pressed against the inner peripheral wall of the active area 12 .

[0053] like Figure 2 As shown, in some embodiments, there are multiple support ribs 32, and the multiple support ribs 32 are arranged at intervals along the circumference of the elastic body 31 and extend along the length direction of the guide groove 11. Alternatively, there are multiple support ribs 32, and the multiple support ribs 32 include at least one row of support ribs 32 arranged at intervals along the length direction of the guide groove 11, and each row of support ribs 32 includes multiple support ribs 32 arranged at intervals along the circumference of the elastic body 31.

[0054] It can be understood that a number of support ribs 32 are arranged in the circumferential direction of the elastic body 31 so that the support ribs 32 are pressed against the inner wall of the active area 12. This can make the deformation of the anti-deformation structure 3 (that is, the tubular structure with high resilience) more uniform after being squeezed by external force, thereby effectively avoiding the problem of the door frame structure being easily stuck due to local deformation under force. At the same time, it ensures that the anti-deformation structure 3 has sufficient strength to prevent the sealing of the door frame structure from being affected after being compressed.

[0055] Specifically, the support rib 32 has a starting end and an end, the starting end of the support rib 32 can be integrally formed on the outer peripheral wall of the elastic body 31, and the end of the support rib 32 presses against the inner peripheral wall of the active area 12. The support rib 32 can be extended and retracted along the extension direction of the elastic body 31.

[0056] Preferably, the supporting ribs 32 are arranged between the elastic body 31 and corners of the active area 12 .

[0057] like Figure 2 As shown, in some embodiments, the pressure-resistant door frame structure also includes a sealing material 4, which is filled between the anti-deformation structure 3 and the active area 12, that is, the sealing material 4 is filled in the active area 12 outside the high-resilience tubular structure to seal the door frame structure.

[0058] It can be understood that sealing the door frame structure with the sealing material 4 can ensure the sealing performance of the door frame structure and prevent air leakage.

[0059] Specifically, the sealing material 4 can be one of a soft foam material and a sealing strip (such as a rubber sealing strip).

[0060] like Figure 1 As shown, in some embodiments, the movable frame 1 and the damper door frame 2 may both include a crossbeam 13 and a column 14, the crossbeam 13 extends along a first direction, and the column 14 extends along a height direction, and the first direction is perpendicular to the height direction.

[0061] The guide groove 11 includes a first guide section and a second guide section (not shown in the figure), the cross beam 13 of the movable frame 1 is provided with the first guide section, the column 14 of the movable frame 1 is provided with the second guide section, the cross beam 13 of the damper door frame 2 is slidably connected to the first guide section along the height direction (that is, the groove depth direction of the first guide section), and the column 14 of the damper door frame 2 is slidably connected to the second guide section (that is, the groove depth direction of the second guide section) along the first direction.

[0062] It can be understood that the movable frame 1 and the damper door frame 2 adopt the above structure, so that the door frame structure can be extended and retracted in the left and right directions and the up and down directions to adapt to external pressures in different directions. The overall structure is simple, easy to produce and process, and low in cost.

[0063] Specifically, the first direction can be the left-right direction in the figure. The height direction can be the up-down direction in the figure. The first guide section can extend along the first direction. The second guide section can extend along the height direction. Taking the figure as an example, the movable frame 1 may include a crossbeam 13 and two columns 14 (i.e., the column 14 at the left end of the crossbeam 13 in the figure and the column 14 at the right end of the crossbeam 13), wherein the crossbeam 13 and the two columns 14 can be slidably matched along the height direction, so that when the crossbeam 13 of the movable frame 1 is subjected to external downward pressure or the column 14 is subjected to external pressure, relative movement can also occur between the crossbeam 13 and the column 14 of the movable frame 1, and the two will not interfere with each other, so as to ensure that the door frame structure can be smoothly deformed to cope with the external pressure effect.

[0064] like Figure 1 and Figure 2 As shown, in some embodiments, the cross beam 13 and the column 14 of the damper door frame 2 are both hollow tubular to reduce the overall weight of the door frame structure.

[0065] In some embodiments, the elastic body 31 includes a first elastic portion and a second elastic portion (not shown in the figure), the first elastic portion is clamped between the crossbeam 13 of the movable frame 1 and the crossbeam 13 of the damper door frame 2 (that is, the first elastic portion is installed in the first guide section) and extends along the first direction, and the second elastic portion is clamped between the column 14 of the movable frame 1 and the column 14 of the damper door frame 2 (that is, the second elastic portion is installed in the second guide section) and extends along the height direction.

[0066] In some embodiments, the pressure-resistant door frame structure also includes a limiting member (not shown in the figure), and the movable frame 1 is connected to the damper door frame 2 through the limiting member, that is, the cross beam 13 of the movable frame 1 and the cross beam 13 of the damper door frame 2, as well as the column 14 of the movable frame 1 and the column 14 of the damper door frame 2 are all connected through the limiting member, so as to limit the movable frame 1 when it moves relative to the damper door frame 2 to prevent the movable frame 1 from separating from the damper door frame 2, and also provide a guiding effect on the movement of the movable frame 1 relative to the damper door frame 2, which is conducive to the smooth resetting of the two later.

[0067] Specifically, the limiting member is a tension bolt.

[0068] like Figure 3 As shown, an underground tunnel damper of an embodiment of the present invention includes a door frame structure and a damper door leaf 5, the door frame structure is the door frame structure of any of the above embodiments, the movable frame 1 in the door frame structure is closer to the tunnel surrounding rock than the damper door frame 2, the movable frame 1 is suitable for being connected to the tunnel surrounding rock, and the damper door frame 2 is formed with a second installation cavity; the damper door leaf 5 is movably connected to the damper door frame 2 and can open and close the second installation cavity.

[0069] It can be understood that the underground tunnel damper according to the embodiment of the present invention, by adopting a pressure-resistant door frame structure, can automatically retract and expand when affected by underground mining activities or ore pressure to adapt to the deformation of the tunnel surrounding rock, reduce the risk of damage to the damper due to mine pressure, and maintain the structural stability of the damper. Therefore, compared with the related technology, the underground tunnel damper in the present invention does not require frequent overhaul and maintenance, reduces the number of replacements, reduces the investment in mine personnel and expenses, and also ensures the efficiency of underground mining.

[0070] Specifically, the damper door leaf 5 may not be limited to being stably mounted on the damper door frame 2 by hinges. Taking the figure as an example, the damper door leaf 5, the damper door frame 2 and the movable frame 1 may be sequentially connected from the inside to the outside.

[0071] In some embodiments, the underground tunnel damper also includes an environmental monitoring system (not shown in the figure), which is installed on any one of the door frame structure and the damper door leaf 5. The environmental monitoring system is used to monitor at least one parameter information of temperature, humidity and pressure in the environment surrounding the damper, so as to monitor the operating status of the damper in real time and evaluate whether the working status of the damper is affected by environmental factors.

[0072] Specifically, the environmental monitoring system may include temperature sensors, humidity sensors, pressure sensors, etc. The data of each sensor is collected by the data acquisition module, and is preliminarily processed, and then the collected data is transmitted to the monitoring center or host computer by wired or wireless means, so as to process and analyze the received data to determine whether there is any abnormality or potential safety hazard in the damper.

[0073] In some embodiments, the underground tunnel damper also includes an alarm device (not shown in the figure), which can be installed on any one of the door frame structure and the damper door leaf 5. The alarm device has at least one of sound alarm and light signal alarm to warn of abnormal conditions of the damper and attract the attention of staff. At the same time, the monitoring center alarm prompts staff to go to the problematic damper to deal with the problem, thereby realizing real-time monitoring of the damper status and abnormal alarm function to ensure production safety.

[0074] In some embodiments, the underground tunnel air door also includes a tunnel wall, the tunnel wall has a third installation cavity, and the movable frame 1 is connected to the tunnel wall and is located in the third installation cavity (not shown in the figure).

[0075] A buffer zone is defined between the outer peripheral wall of the tunnel wall and the inner peripheral wall of the tunnel surrounding rock, and the buffer zone is filled with a buffer material (not shown in the figure) so that the damper can resist external pressure.

[0076] In some embodiments, at least one of the movable frame 1, the damper door frame 2 and the damper door leaf 5 is provided with an anti-corrosion coating (not shown in the figure) to ensure the service life of the damper in the underground tunnel.

[0077] Alternatively, at least one of the movable frame 1, the damper door frame 2 and the damper door leaf 5 is made of an anti-corrosion material.

[0078] It can be understood that the present invention has the following advantages:

[0079] 1) A tubular structure with high resilience is selected as the main body of the anti-deformation structure 3, which can well adapt to the tunnel deformation caused by mine pressure. This structure can deform when subjected to external pressure, and can quickly return to its original shape when the pressure is released, thereby maintaining the stability and sealing of the damper;

[0080] 2) Due to the complex and changeable geological conditions in coal mines and the uneven distribution of mine pressure, the surrounding area of ​​the damper is often squeezed and deformed to varying degrees. The highly resilient tubular structure can flexibly adapt to these deformations, reduce the stress concentration on the damper itself, and thus reduce the risk of deformation and damage;

[0081] 3) The sealing of the damper is an important factor in ensuring the safety of mine ventilation. The design of the anti-deformation structure 3 aims to maintain the shape of the damper periphery through its resilience, ensure that the sealing material 4 (such as a rubber sealing strip) can fit tightly, prevent air leakage, and improve the sealing effect of the underground damper.

[0082] Therefore, the underground tunnel damper in the present invention is suitable for all mine safety management, and can adapt well to the tunnel deformation caused by mine pressure, so that the damper can be deformed when subjected to external pressure, and can quickly return to its original shape when the pressure is released, thereby maintaining the stability and sealing of the damper and meeting the different conditions of different mines and different tunnels.

[0083] like Figure 4 As shown, a method for installing an underground tunnel damper according to an embodiment of the present invention comprises the following steps:

[0084] Step S1, constructing a wind gate foundation in the surrounding rock of the tunnel to form a structure;

[0085] Step S2, install the anti-deformation structure 3 in the guide groove 11 of the movable frame 1, assemble the movable frame 1 and the damper door frame 2 to obtain the door frame structure, install the door frame structure in the building body, and assemble the damper door leaf 5 on the door frame structure to complete the installation of the underground tunnel damper.

[0086] The technical advantages of the installation method of the underground tunnel air door according to the embodiment of the present invention are the same as the technical advantages of the underground tunnel air door mentioned above, and will not be repeated here.

[0087] like Figure 5 As shown, in some embodiments, before step S1, the method further includes, step S0, cleaning and repairing the underground tunnel to ensure that the tunnel roof and sides are intact, the support is complete, and the concentrated stress area and dynamic pressure area are avoided.

[0088] It should be noted that in some embodiments of the present invention, the installation method of the underground tunnel damper includes step S1 and step S2; in other embodiments, the installation method of the underground tunnel damper includes step S0, step S1 and step S2. Therefore, the installation method of the underground tunnel damper of the present invention can be the above two methods.

[0089] like Figure 6 As shown, in some embodiments, step S1 includes:

[0090] Step S11, building a foundation, a wall and a vault in the cutout of the tunnel surrounding rock wall to obtain a tunnel wall, wherein the outer peripheral wall of the tunnel wall is separated from the inner peripheral wall of the tunnel surrounding rock to form a buffer zone;

[0091] Step S12, filling the buffer area with buffer material to form a buffer zone, thereby completing the construction of the structure.

[0092] In some embodiments, the depth of the door frame structure embedded in the tunnel wall is not less than 100 mm, and the width of the door frame structure exposed outside the tunnel wall is not less than 150 mm.

[0093] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0094] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0095] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0096] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0097] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0098] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A pressure-resistant door frame structure, characterized in that: include: A movable frame and a damper door frame, wherein the movable frame is formed around a first mounting cavity and has a guide groove, the damper door frame is located in the first mounting cavity and is movably connected to the guide groove along the depth direction of the guide groove, and a movable area is defined between the outer peripheral wall of the damper door frame and the inner peripheral wall of the guide groove; as well as An anti-deformation structure is installed in the active area and has a first critical state and a second critical state. The anti-deformation structure can switch from the first critical state to the second critical state to undergo elastic deformation when the active door frame moves relative to the damper door frame. The anti-deformation structure can switch from the second critical state to the first critical state and rebound to drive the active frame and the damper door frame to reset.

2. The pressure-resistant door frame structure according to claim 1, characterized in that: The anti-deformation structure comprises an elastic body, which is in a hollow tubular shape and extends along the length direction of the guide groove; And / or, the cross section of the elastic body may be one of an elliptical ring, a circular ring, a polygonal ring and any closed curve ring.

3. The pressure-resistant door frame structure according to claim 2, characterized in that: The anti-deformation structure further comprises a supporting rib, wherein the supporting rib is connected to the elastic body, and a portion of the supporting rib away from the elastic body is pressed against the inner peripheral wall of the active area; And / or, there are multiple support ribs, and the multiple support ribs are arranged at intervals along the circumference of the elastic body and extend along the length direction of the guide groove.

4. The pressure-resistant door frame structure according to claim 1, characterized in that: It also includes a sealing material, which is filled between the anti-deformation structure and the active area to seal the door frame structure; And / or, the sealing material is one of a soft foam material and a sealing strip.

5. The pressure-resistant door frame structure according to any one of claims 1 to 4, characterized in that: It also includes a limiting member, through which the movable frame is connected to the damper door frame, so as to limit the movable frame and the damper door frame when the movable frame moves relative to the damper door frame; And / or, the limiting member is a tension bolt.

6. An underground tunnel air door, characterized in that: include: A door frame structure, wherein the door frame structure is the door frame structure described in any one of claims 1 to 5, wherein the movable frame in the door frame structure is closer to the tunnel surrounding rock than the damper door frame, the movable frame is suitable for being connected to the tunnel surrounding rock, and the damper door frame is formed with a second installation cavity around it; and A damper door leaf is movably connected to the damper door frame and is capable of opening and closing the second mounting cavity.

7. The underground tunnel air door according to claim 6, characterized in that: It also includes an environmental monitoring system, which is installed on any one of the door frame structure and the damper door leaf, and is used to monitor at least one parameter information of temperature, humidity and pressure in the environment around the damper.

8. The underground tunnel air door according to claim 7, characterized in that: It also includes an alarm device, which has at least one alarm mode of sound alarm and light signal alarm to provide early warning of abnormal conditions of the damper.

9. The underground tunnel damper according to any one of claims 6 to 8, characterized in that: The underground tunnel air door further comprises a tunnel wall, the tunnel wall has a third installation cavity, the movable frame is connected to the tunnel wall and is located in the third installation cavity; A buffer zone is defined between the outer peripheral wall of the tunnel wall and the inner peripheral wall of the tunnel surrounding rock, and the buffer zone is filled with buffer material so that the damper can resist external pressure.

10. A method for installing an underground tunnel damper, characterized in that: The following steps are involved: Construct the wind gate foundation in the surrounding rock of the tunnel to form a structure; The anti-deformation structure is installed in the guide groove of the movable frame, the movable frame and the damper door frame are assembled to obtain a door frame structure, the door frame structure is installed in the structure, and the damper door leaf is assembled on the door frame structure to complete the installation of the underground tunnel damper.

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