A rail transit monitoring equipment bracket and use method thereof

Abstract

The present invention relates to the technical field of traffic monitoring equipment brackets, and specifically to a rail transit monitoring equipment bracket and a method of using the same, wherein cavities are evenly opened on the fixed base plate, and expansion and reinforcement components are arranged inside the cavities. When the cavities are filled with air pressure, the expansion and reinforcement components can be moved and extended. A mounting platform is arranged on the side of the fixed base plate, and the fixed base plate and the mounting platform are connected by an air pressure leveling component. The air pressure leveling component can use air pressure to automatically level the mounting platform when the mounting platform is tilted; a rail transit monitoring equipment bracket, comprising the following method of use: step one: installing the fixed base plate, step two: enhancing the fit, step three: leveling the platform, after leveling, the air inlet and the corresponding groove will be staggered with each other again, that is, after the mounting platform is leveled, the air pressure will not enter the interior of the interconnected cavity, thereby achieving the purpose of automatic leveling of the mounting platform, thereby reducing the error caused by the leveling of the mounting platform.

Description

Technical Field

[0001] The present invention relates to the technical field of traffic monitoring equipment brackets, and in particular to a rail traffic monitoring equipment bracket and a use method thereof. Background Art

[0002] Rail transit subways often operate underground, so a foundation pit corresponding to the subway is dug underground. The excavation of the subway foundation pit will cause changes in the load outside the foundation pit, which will affect the safety of the subway movement. Therefore, it is necessary to set up a total station in the tunnel foundation pit to inspect the subway at any time in order to understand the operation of the subway and ensure the safety of the subway operation. The total station is a type of rail transit detection equipment.

[0003] The detection equipment total station needs to be suspended and installed in the tunnel foundation pit. Its installation and positioning are mainly carried out with the help of a bracket, that is, the bracket is installed on the tunnel foundation pit, and the detection equipment is fixed on the bracket so that the detection equipment can carry out detection work.

[0004] For example, the authorization (announcement) number: CN114321670B discloses a rail transit monitoring equipment bracket and its use method, which discloses the installation bracket of the detection equipment. Among the above-mentioned prior arts, the bracket has a leveling function, and the leveling means is to use eight screw rods and four thread sleeves;

[0005] The above-mentioned prior art requires manual operation of the thread sleeve during leveling. Therefore, during the leveling process, the staff needs to use tools such as ladders to complete the leveling operation, and the staff's head must be flush with the installation platform, and use the naked eye to observe whether the installation platform is flush. However, the light in the subway is dim, so the error of the leveling result is large. At the same time, it is inconvenient for the staff to perform lifting operations in a narrow place such as a tunnel foundation pit. Further, the tunnel foundation pit is underground and the environment is humid. The exposed parts of the screw rod for a long time are very prone to rust. The rusted screw rod is not conducive to the leveling of the installation platform, and the hand-turned thread sleeve cannot be turned. Summary of the invention

[0006] The object of the present invention is to provide a rail transit monitoring equipment bracket and a method of using the same to solve the problems mentioned in the above process.

[0007] To achieve the above object, the present invention provides the following technical solution: a rail transit monitoring equipment bracket, comprising a fixed bottom plate, a pressure storage cavity is arranged in the fixed bottom plate, and a connecting branch pipe communicating with the pressure storage cavity is connected to the bottom of the fixed bottom plate;

[0008] The fixed bottom plate is evenly provided with cavities, and the inside of the cavities is provided with a support and reinforcement component. When the cavity is filled with air pressure, the support and reinforcement component can move and extend. The side of the fixed bottom plate is provided with a mounting platform. The fixed bottom plate and the mounting platform are connected by an air pressure leveling component. The air pressure leveling component can use air pressure to realize automatic leveling of the mounting platform when the mounting platform is tilted;

[0009] A gas delivery pipe for delivering gas is installed at the lower side of the connecting branch pipe, a first valve is installed on the gas delivery pipe, a ventilation pipe is installed on the gas delivery pipe, and a stable base is arranged at the lower side of the gas delivery pipe.

[0010] Preferably, the expansion reinforcement component includes a movable rod arranged in the cavity, and a partition baffle is also arranged in the cavity, grooves are evenly arranged on the partition baffle, a tensioning tube connected to the partition baffle, an expansion tube is arranged on the movable rod, and a reducing end mounted on the movable rod, and a bulge piece is arranged on the outside of the reducing end.

[0011] Preferably, the partition baffle is connected to the fixed bottom plate, wherein the tension tube is arranged between the partition baffle and the movable rod, the movable rod is arranged in a T-shape, wherein the reduced end is in a hemispherical shape, and the bulge piece is fixed on the movable rod.

[0012] Preferably, a central hollow rod is provided through the axial position of the movable rod, wherein resistance pieces are evenly provided on the periphery of the central hollow rod, and the resistance pieces are embedded in the expansion tube, wherein guide plates are symmetrically provided on the resistance pieces.

[0013] Preferably, the guide plate is embedded in the expansion tube, and friction blocks are evenly arranged on the side of the abutment sheet facing away from the central hollow rod, wherein a telescopic rod is arranged between the abutment sheet and the central hollow rod.

[0014] Preferably, the pneumatic leveling assembly includes a four-corner support frame fixedly connected to the fixed base plate, a limiting frame arranged in the middle of the four-corner support frame, an interconnecting cavity opened in the four-corner support frame, air inlets evenly opened in the four-corner support frame, a pressure ring embedded in the four-corner support frame, a lifting rod arranged on the upper side of the pressure ring, a containing frame installed on the lifting rod, and an adjustment rod connected to the containing frame with a ball joint.

[0015] Preferably, the interconnecting cavity and the air inlet are interconnected, wherein the air inlet also passes through the limiting frame, the pressure ring is placed inside the interconnecting cavity, wherein the containing frame is outside the four-corner support frame, the adjustment rod is fixedly connected to the mounting platform on the side away from the containing frame, and a center of gravity self-adjusting component is provided in the middle of the limiting frame, and the center of gravity self-adjusting component can be perpendicular to the ground when the four-corner support frame is tilted.

[0016] Preferably, the center of gravity self-adjusting component includes a rotating sphere arranged inside a limiting frame, corresponding grooves evenly opened on the rotating sphere, an extension tube installed on the rotating sphere, a second valve being provided on the extension tube, a counterweight block sleeved on the extension tube, and a hose connected to the extension tube.

[0017] Preferably, the second valve is arranged above the counterweight block, wherein a side of the hose away from the extension pipe is connected to the air pipe, and the counterweight block and the extension pipe are fixedly connected.

[0018] A rail transit monitoring equipment bracket, including the following use method:

[0019] Step 1: Install the fixed bottom plate, dig a circular hole in the tunnel foundation pit corresponding to the installation of the fixed bottom plate, fix the four corners of the fixed bottom plate with expansion screws, and make the position of the movable rod correspond to the position of the circular hole;

[0020] Step 2: Enhance the fit. The gas delivery pipe adds air pressure to the pressure storage cavity with the help of the connecting branch pipe. The pressure storage cavity is filled with air pressure. The air pressure will enter the cavity through the groove. The air pressure will push the movable rod, so that the movable rod will move in the cavity. At this time, the end of the movable rod will be inserted into the round hole. At the same time, part of the gas will enter the movable rod with the help of the central hollow rod. The gas will eventually flow out from the through hole on the reduced end and accumulate pressure in the bulge sheet. The stored pressure gas will cause the bulge sheet to bulge and fit tightly to the inner wall of the round hole.

[0021] Step three: Level the platform. When the fixed base plate tilts or safely tilts, the four-corner support frame fixedly connected to the fixed base plate will tilt, and then the installation platform set on the four-corner support frame will tilt. At this time, the rotating sphere can rotate freely in the restriction frame. Under the action of the counterweight block, the restriction frame is always vertically downward, but the air inlet corresponding to the downward tilted position of the four-corner support frame will overlap with the corresponding groove. At this time, the high-pressure gas in the rotating sphere can enter the air inlet temporarily connected to the corresponding groove with the help of the corresponding groove, and then the high-pressure gas enters the interior of the interconnected cavity, so that the gas pushes the lifting rod at the corresponding corner upward to achieve the leveling of the installation platform.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. Part of the gas will enter the interior of the movable rod with the help of the central hollow rod. These gases will eventually flow out from the through hole on the reduced end and accumulate pressure in the bulge sheet. The pressurized gas will cause the bulge sheet to swell and fit tightly against the inner wall of the circular hole, thereby effectively increasing the close contact between the fixed bottom plate and the tunnel foundation pit, and the movable rod and the central hollow rod will be misaligned. After the final misalignment of the two structures, the telescopic rod will push the contact sheet outward, allowing the contact sheet to closely contact the inner wall of the fixed bottom plate, thereby strengthening the connection between the fixed bottom plate and the tunnel, so that the fixed bottom plate will not easily tilt;

[0024] Second, when the four-corner support frame tilts, the limit frame will also tilt. Under the action of the counterweight, the rotating sphere always moves vertically downward. At this time, the air inlet corresponding to the downward tilted position of the four-corner support frame will overlap with the corresponding groove. At this time, the high-pressure gas in the rotating sphere can enter the air inlet temporarily interconnected with the corresponding groove with the help of the corresponding groove. Then the high-pressure gas enters the interconnected cavity, so that the gas pushes the lifting rod at the corresponding corner upward. Therefore, the tilted part of the installation platform will be lifted up by the lifting rod, so that the purpose of leveling the installation platform can be quickly achieved;

[0025] 3. The pneumatic leveling method is convenient and fast. It does not require the staff to use tools such as ladders for leveling. After leveling, the air inlet and the corresponding groove will be staggered with each other. That is, after the installation platform is leveled, the air pressure will not enter the interior of the interconnected cavity, thereby achieving the purpose of automatic leveling of the installation platform, thereby reducing the error caused by the leveling of the installation platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0027] Figure 2 It is a half-cut three-dimensional schematic diagram of the fixed bottom plate of the present invention.

[0028] Figure 3 It is a half-section stereoscopic schematic diagram of the movable rod of the present invention.

[0029] Figure 4 It is a three-dimensional schematic diagram of the installation platform of the present invention.

[0030] Figure 5 It is a half-cut three-dimensional schematic diagram of the four-corner support frame of the present invention.

[0031] Figure 6 It is a three-dimensional schematic diagram of the rotating sphere of the present invention.

[0032] Figure 7 It is a three-dimensional schematic diagram of the central hollow rod of the present invention.

[0033] Figure 8 For the present invention Figure 3A is an enlarged schematic diagram.

[0034] In the figure: 1. fixed bottom plate; 11. pressure storage cavity; 12. connecting branch pipe; 13. gas transmission pipe; 14. first valve; 15. ventilation pipe; 16. stable base; 2. movable rod; 201. central hollow rod; 202. resistance plate; 203. guide plate; 204. friction block; 205. telescopic rod; 21. partition baffle; 22. through groove; 23. pulling distance cylinder; 24. expansion cylinder; 25. reducing end; 26. bulging piece; 3. installation platform; 4. four-corner support frame; 41. limiting frame; 4101. rotating ball; 4102. corresponding groove; 4103. extension pipe; 4104. second valve; 42. intercommunication cavity; 43. air inlet; 44. pressure ring; 45. lifting rod; 46. containing frame; 47. adjustment rod; 4105. counterweight; 4106. hose. DETAILED DESCRIPTION

[0035] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention. The present invention is by no means limited to any specific configuration and algorithm proposed below, but covers any modification, replacement and improvement of elements, parts and algorithms without departing from the spirit of the present invention. In the accompanying drawings and the following description, known structures and technologies are not shown to avoid unnecessary ambiguity to the present invention. Example

[0036] Reference Figure 1-5 , which is the first embodiment of the present invention, comprises a fixed bottom plate 1, a pressure storage cavity 11 is arranged in the fixed bottom plate 1, and a connecting branch pipe 12 communicating with the pressure storage cavity 11 is connected to the bottom of the fixed bottom plate 1; when the fixed bottom plate 1 is installed inside the tunnel foundation pit, a circular hole corresponding to the support and reinforcement component is pre-opened on the tunnel foundation pit, so as to strengthen the connection between the fixed bottom plate 1 and the tunnel foundation pit,

[0037] The fixed base plate 1 is evenly provided with cavities, and the inside of the cavities is provided with expansion and reinforcement components. When the cavities are filled with air pressure, the expansion and reinforcement components can be moved and extended. The side of the fixed base plate 1 is provided with a mounting platform 3. The fixed base plate 1 and the mounting platform 3 are connected by an air pressure leveling component. The air pressure leveling component can use air pressure to realize automatic leveling of the mounting platform 3 when the mounting platform 3 is tilted;

[0038] A gas pipe 13 for transmitting gas is installed at the lower side of the connecting branch pipe 12, and a first valve 14 is installed on the gas pipe 13. The first valve 14 is a one-way valve, and the gas passing through the gas pipe 13 is controlled by means of the first valve 14. A ventilation pipe 15 is installed on the gas pipe 13, and the ventilation pipe 15 is interconnected with the gas pipe 13 and fixedly connected, and the side of the ventilation pipe 15 away from the gas pipe 13 can be connected to the high-pressure pump body, and the high-pressure pump body transports high-pressure gas to the inside of the gas pipe 13 by means of the ventilation pipe 15, wherein a stable base 16 is arranged on the lower side of the gas pipe 13, and the stable base 16 can be formed by pouring cement, and the purpose of the stable base 16 is to stabilize the position of the gas pipe 13.

[0039] The expansion and strengthening assembly includes a movable rod 2 arranged in a cavity, and a partition baffle 21 is also arranged in the cavity, through grooves 22 are evenly arranged on the partition baffle 21, a distance tube 23 connected to the partition baffle 21, and the distance tube 23 is fixedly connected to the partition baffle 21. At the same time, the distance tube 23 is arranged inside the cavity, and an expansion tube 24 is arranged on the movable rod 2. The expansion tube 24 and the movable rod 2 are an integrally formed structure, and a reduction end 25 is installed on the movable rod 2, and the outer part of the reduction end 25 is provided with a bulge sheet 26. A through hole is opened in the middle position of the reduction end 25 so that air pressure can enter the bulge sheet 26.

[0040] The partition baffle 21 is connected to the fixed base plate 1, and the partition baffle 21 is fixed on the fixed base plate 1, wherein the tension tube 23 is arranged between the partition baffle 21 and the movable rod 2, and the tension tube 23 can prevent the partition baffle 21 and the movable rod 2 from contacting each other, thereby preventing the movable rod 2 from sticking to the tension tube 23 and covering the through groove 22, and the interior of the movable rod 2 is hollow, and the movable rod 2 is T-shaped, wherein the reduced end 25 is in the shape of a hemisphere, and the bulge piece 26 is fixed on the movable rod 2.

[0041] A central hollow rod 201 is provided through the axial position of the movable rod 2, wherein the periphery of the central hollow rod 201 is evenly provided with resistance sheets 202, which are embedded in the expansion tube 24, wherein guide plates 203 are symmetrically provided on the resistance sheet 202, which are embedded in the expansion tube 24, and the guide plates 203 guide the position of the resistance sheet 202 on the expansion tube 24, and friction blocks 204 are evenly provided on the side of the resistance sheet 202 facing away from the central hollow rod 201, and the friction blocks 204 are provided in a triangular shape, and the friction blocks 204 are fixedly connected to the resistance sheet 202, wherein a retractable rod 205 is provided between the resistance sheet 202 and the central hollow rod 201. The two ends of the telescopic rod 205 are respectively hingedly connected to the contact piece 202 and the central hollow rod 201. The telescopic length of the telescopic rod 205 is smaller than the moving distance of the movable rod 2. When the telescopic rod 205 is perpendicular to the movable rod 2, the telescopic rod 205 can push the contact piece 202 outward.

[0042] When the fixed bottom plate 1 is installed, the position of the movable rod 2 is made to correspond to the circular hole on the tunnel foundation pit, and then the gas transmission pipe 13 adds air pressure to the pressure storage cavity 11 with the help of the connecting branch pipe 12. The pressure storage cavity 11 is filled with air pressure, and these air pressures enter the interior of the cavity through the through groove 22. The air pressure will push the movable rod 2, so that the movable rod 2 will move in the cavity. At this time, the end of the movable rod 2 will be inserted into the circular hole, and at the same time, part of the gas will enter the interior of the movable rod 2 with the help of the central hollow rod 201. These gases will eventually flow out from the through hole on the reduced end 25 and enter the bulge sheet 2. 6 accumulates pressure, and the pressurized gas will cause the bulging piece 26 to swell and fit tightly against the inner wall of the circular hole, thereby effectively increasing the close contact between the fixed bottom plate 1 and the tunnel foundation pit, and during the movement of the movable rod 2, the central hollow rod 201 does not move, so the movable rod 2 and the central hollow rod 201 will be misaligned. After the final misalignment of the two structures, the telescopic rod 205 will push the contact piece 202 outward, so that the contact piece 202 is in close contact with the inner wall of the fixed bottom plate 1, and the setting of the friction block 204 can increase the friction between the contact piece 202 and the fixed bottom plate 1. Example

[0043] Reference Figure 4-8, which is the second embodiment of the present invention, and this embodiment is different from the first embodiment in that: the air pressure leveling assembly includes a four-corner support frame 4 fixedly connected to the fixed base plate 1, a limiting frame 41 arranged in the middle of the four-corner support frame 4, the limiting frame 41 is fixedly connected to the four-corner support frame 4, the limiting frame 41 is a spherical frame with flattened ends, an intercommunication cavity 42 opened in the four-corner support frame 4, an air inlet 43 evenly opened in the four-corner support frame 4, a pressing ring 44 embedded in the four-corner support frame 4, a lifting rod 45 arranged on the upper side of the pressing ring 44, a receiving frame 46 installed on the lifting rod 45, and an adjustment rod 47 connected to the receiving frame 46 by a ball joint. The lifting rod 45 is T-shaped, and a spiral elastic sheet is sleeved on the lifting rod 45, and the elastic sheet facilitates the subsequent resetting of the lifting rod 45.

[0044] The interconnecting cavity 42 and the air inlet 43 are interconnected, wherein the air inlet 43 also passes through the limiting frame 41, and the pressure ring 44 is placed inside the interconnecting cavity 42, wherein the accommodating frame 46 is outside the four-corner support frame 4, and the adjustment rod 47 is fixedly connected to the mounting platform 3 on the side away from the accommodating frame 46, and a center of gravity self-adjusting component is provided in the middle of the limiting frame 41, and the center of gravity self-adjusting component can be perpendicular to the ground when the four-corner support frame 4 is tilted.

[0045] The self-adjusting center of gravity assembly includes a rotating sphere 4101 arranged inside the limiting frame 41, the rotating sphere 4101 is hollow, and corresponding grooves 4102 are evenly arranged on the rotating sphere 4101, and the corresponding grooves 4102 are located obliquely below the air inlet 43. When the four-corner support frame 4 is not tilted, there will be no communication between the corresponding grooves 4102 and the air inlet 43, an extension tube 4103 installed on the rotating sphere 4101, and a second valve 4104 is arranged on the extension tube 4103, and the second valve 4104 can be a one-way valve, a counterweight 4105 sleeved on the extension tube 4103, and a hose 4106 connected to the extension tube 4103. The hose 4106 is made of soft material, so that the hose 4106 will not affect the vertical downward movement of the extension tube 4103.

[0046] The second valve 4104 is arranged above the counterweight 4105, wherein the side of the hose 4106 away from the extension tube 4103 is connected to the gas pipe 13, and the counterweight 4105 and the extension tube 4103 are fixedly connected. The gas pipe 13 can transport the high-pressure gas to the rotating sphere 4101 via the hose 4106 and the extension tube 4103.

[0047] Initially, after the fixed base plate 1 is stably installed and in a horizontal position, the detection equipment is installed on the mounting platform 3 of the bracket for normal detection. Once the fixed base plate 1 is tilted or safely tilted, the four-corner support frame 4 fixedly connected to the fixed base plate 1 will tilt, and then the mounting platform 3 set on the four-corner support frame 4 will tilt. When the four-corner support frame 4 tilts, the limiting frame 41 will also tilt. At this time, since the shape of the rotating ball 4101 is set to be spherical, and the rotating ball 4101 can rotate freely in the limiting frame 41, under the action of the counterweight block 4105, the rotating ball 4101 is always vertically downward, but the air inlet 43 corresponding to the downward tilted position of the four-corner support frame 4 will overlap with the corresponding groove 4102 At this time, the high-pressure gas in the rotating sphere 4101 can enter the air inlet 43 temporarily communicating with the corresponding groove 4102 with the help of the corresponding groove 4102, and then the high-pressure gas enters the interior of the interconnected cavity 42, so that the gas pushes the lifting rod 45 at the corresponding corner upward, so that the tilted part of the installation platform 3 will be lifted up by the lifting rod 45, so that the purpose of leveling the installation platform 3 can be quickly achieved, and this pneumatic leveling method is convenient and fast, and does not require the staff to use tools such as ladders for leveling, and after leveling, the air inlet 43 and the corresponding groove 4102 will be staggered with each other, that is, after the installation platform 3 is leveled, the air pressure will not enter the interior of the interconnected cavity 42, thereby achieving the purpose of automatic leveling of the installation platform 3, thereby reducing the error caused by the leveling of the installation platform 3.

[0048] The remaining structures are the same as those of Example 1.

[0049] Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Based on the study of the drawings, the specification and the claims, those skilled in the art should be able to understand and implement other variations of the disclosed embodiments. In the claims, the term "comprising" does not exclude other devices or steps; the indefinite article "a" does not exclude a plurality; the terms "first" and "second" are used to indicate names rather than to indicate any specific order. Any figure marks in the claims should not be construed as limiting the scope of protection. The functions of multiple parts appearing in the claims can be implemented by a single hardware or software module. The fact that certain technical features appear in different dependent claims does not mean that these technical features cannot be combined to achieve beneficial effects.

Claims

1. A rail transit monitoring equipment bracket, comprising a fixed base plate (1), wherein a pressure storage cavity (11) is arranged in the fixed base plate (1), and a connecting branch pipe (12) communicating with the pressure storage cavity (11) is connected to the bottom of the fixed base plate (1); It is characterized in that The fixed base plate (1) is evenly provided with cavities, and the interiors of the cavities are all provided with expansion and reinforcement components. When the cavities are filled with air pressure, the expansion and reinforcement components can be moved and extended. A mounting platform (3) is provided on the side of the fixed base plate (1). The fixed base plate (1) and the mounting platform (3) are connected via an air pressure leveling component. When the mounting platform (3) is tilted, the air pressure leveling component can use air pressure to automatically level the mounting platform (3). A gas delivery pipe (13) for delivering gas is installed on the lower side of the connecting branch pipe (12), a first valve (14) is installed on the gas delivery pipe (13), a vent pipe (15) is installed on the gas delivery pipe (13), and a stable base (16) is provided on the lower side of the gas delivery pipe (13); The expansion reinforcement assembly comprises a movable rod (2) arranged in a cavity, a partition baffle (21) also arranged in the cavity, through grooves (22) evenly arranged on the partition baffle (21), a stretching tube (23) connected to the partition baffle (21), an expansion tube (24) arranged on the movable rod (2), and a reduction end (25) installed on the movable rod (2), and a bulge sheet (26) is arranged on the outside of the reduction end (25); The partition baffle (21) is connected to the fixed bottom plate (1), wherein the pull-distance tube (23) is arranged between the partition baffle (21) and the movable rod (2), the movable rod (2) is arranged in a T-shape, wherein the reduced end (25) is in a hemispherical shape, and the bulge sheet (26) is fixed on the movable rod (2); A central hollow rod (201) is provided at the axis position of the movable rod (2), wherein the outer periphery of the central hollow rod (201) is evenly provided with a resisting piece (202), and the resisting piece (202) is embedded in the expansion tube (24), wherein a guide plate (203) is symmetrically provided on the resisting piece (202); The guide plate (203) is embedded in the expansion tube (24), and friction blocks (204) are evenly arranged on the side of the abutment sheet (202) facing away from the central hollow rod (201), wherein a telescopic rod (205) is arranged between the abutment sheet (202) and the central hollow rod (201); The air pressure leveling assembly comprises a four-corner support frame (4) fixedly connected to the fixed base plate (1), a limiting frame (41) arranged in the middle of the four-corner support frame (4), an intercommunication cavity (42) opened in the four-corner support frame (4), air inlets (43) evenly opened in the four-corner support frame (4), a pressure ring (44) embedded in the four-corner support frame (4), a lifting rod (45) arranged on the upper side of the pressure ring (44), a containing frame (46) installed on the lifting rod (45), and an adjustment rod (47) connected to the containing frame (46) by a ball joint; The interconnecting cavity (42) and the air inlet (43) are interconnected, wherein the air inlet (43) is also arranged to penetrate the limiting frame (41), the pressing ring (44) is placed inside the interconnecting cavity (42), wherein the containing frame (46) is outside the four-corner support frame (4), the adjusting rod (47) is fixedly connected to the mounting platform (3) on the side away from the containing frame (46), and a self-adjusting center of gravity component is arranged in the middle of the limiting frame (41), and the self-adjusting center of gravity component can be perpendicular to the ground when the four-corner support frame (4) is tilted; The center of gravity self-adjusting component comprises a rotating sphere (4101) arranged inside a limiting frame (41), corresponding grooves (4102) evenly arranged on the rotating sphere (4101), an extension tube (4103) installed on the rotating sphere (4101), a second valve (4104) being arranged on the extension tube (4103), a counterweight (4105) sleeved on the extension tube (4103), and a hose (4106) connected to the extension tube (4103).

2. A rail transit monitoring equipment bracket according to claim 1, Features: The second valve (4104) is arranged above the counterweight (4105), wherein the side of the hose (4106) away from the extension tube (4103) is connected to the air supply pipe (13), and the counterweight (4105) and the extension tube (4103) are fixedly connected.

3. A rail transit monitoring equipment bracket according to any one of claims 1 or 2, comprising the following method of use: Step 1: Install the fixed base plate (1), dig a circular hole in the tunnel foundation pit corresponding to the installation of the fixed base plate (1), wherein the four corners of the fixed base plate are fixed with expansion screws, and the position of the movable rod (2) is made to correspond to the position of the circular hole; Step 2: To enhance the fit, the gas delivery pipe (13) adds gas pressure to the pressure storage chamber (11) by means of the connecting branch pipe (12). The pressure storage chamber (11) is filled with gas pressure, which enters the cavity through the through groove (22). The gas pressure pushes the movable rod (2) so that the movable rod (2) moves in the cavity. At this time, the end of the movable rod (2) is inserted into the circular hole. At the same time, part of the gas enters the movable rod (2) by means of the central hollow rod (201). The gas eventually flows out from the through hole on the reduced end (25) and accumulates pressure in the bulge sheet (26). The accumulated gas causes the bulge sheet (26) to swell and fit tightly to the inner wall of the circular hole. Step 3: Leveling the platform. When the fixed base plate (1) tilts or safely tilts, the four-corner support frame (4) fixedly connected to the fixed base plate (1) will tilt, and then the installation platform (3) arranged on the four-corner support frame (4) will tilt. At this time, the rotating ball (4101) can rotate freely in the limiting frame (41). Under the action of the counterweight (4105), the limiting frame (41) is always vertically downward, but the air inlet (43) corresponding to the downward tilted position of the four-corner support frame (4) will overlap with the corresponding groove (4102). At this time, the high-pressure gas in the rotating ball (4101) can enter the air inlet (43) temporarily interconnected with the corresponding groove (4102) through the corresponding groove (4102), and then the high-pressure gas enters the interior of the interconnected cavity (42), so that the gas pushes the lifting rod (45) at the corresponding corner upward, thereby achieving the leveling of the installation platform (3).

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