Shield tunnel construction safety monitoring device based on rich water-mudstone sand layer

Abstract

The utility model discloses a water-rich-mudstone sand layer-based shield tunnel construction safety monitoring device, which comprises a water-rich sand layer tunnel oxygen monitoring assembly, the oxygen detector body is electrically connected with a gas alarm controller A through a wire, the gas inlet pipe end is communicated with the interior of the oxygen detector body, the alarm lamp is electrically connected with the oxygen detector body, and a fixing rod is arranged on the surface of the top of the oxygen detector body; the outer side of the oxygen detector main body is provided with a design for filtering impurities in external gas and conveniently cleaning blocked impurities, the impurities in oxygen-containing air pass through the first filter screen, the filter gauze element and the outer filter ring, and the oxygen-containing air enters the oxygen detector main body after being filtered, so that the aim of pretreating the impurities in the oxygen-containing air is fulfilled; the oxygen detector body and the filtering treatment cover are of a combined structure, the oxygen detector body can be disassembled and assembled, and impurities filtered out of the filtering treatment cover can be cleaned conveniently.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas detection equipment for shield tunnel construction, and in particular relates to a safety monitoring device for shield tunnel construction based on a water-rich mudstone sand layer. Background Art

[0002] In the construction of shield tunnels in water-rich sand layers, gas detection is an important link to ensure safe operation in the tunnel. The gas environment in the tunnel has a great impact on the normal operation of the tunnel. For example, too low an oxygen concentration can cause driver fatigue, inattention, and may even cause traffic accidents. Tunnel gas monitoring instruments can ensure that the gas environment in the tunnel is in a good state, ensure the normal operation of the tunnel, and prevent accidents. Oxygen detectors are a conventional device used for safe monitoring of oxygen concentration in shield tunnel construction. They are generally used in conjunction with controllers. Their principle is based on the characteristics of oxygen in electrochemical reactions. When oxygen-containing air enters the oxygen detector, it reacts with the electrolyte to generate current. The current is proportional to the oxygen concentration. The oxygen concentration is determined by measuring the current change during the electrical reaction.

[0003] When an oxygen detector is used in conjunction with a controller for a long time, there may be problems such as instrument indication deviation, unstable instrument alarm device, continuous alarm sound from the detector, and unstable instrument indication. One of the reasons for the unstable instrument indication is that the oxygen detector is in a ventilated place or an air flow intersection, and the gas contains more impurities, which causes the filter in the oxygen detector to be clogged. The filter is installed inside the instrument, and the clogged filter cannot be cleaned conveniently. When the oxygen detector is used, there is a problem of no design for filtering impurities in the gas outside the body and facilitating the cleaning of clogged impurities. For this reason, this application proposes a safety monitoring device for shield tunnel construction based on a water-rich mudstone sand layer. Utility Model Content

[0004] The purpose of the present utility model is to provide a safety monitoring device for shield tunnel construction based on a water-rich mudstone sand layer, so as to solve the problem in the above-mentioned background technology that the oxygen detector does not have an external filter for impurities in the gas and is convenient for cleaning the blocked impurities.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: a safety monitoring device for shield tunnel construction based on water-rich mudstone sand layer, comprising

[0006] An oxygen monitoring assembly for a water-rich sand tunnel includes an oxygen detector body electrically connected to a gas alarm controller A via a wire, an air inlet pipe end communicating with the interior of the oxygen detector body, and an alarm light electrically connected to the oxygen detector body. A fixing rod is provided on the top surface of the oxygen detector body.

[0007] The mounting mechanism includes a mounting plate, a support plate connected to the bottom end of the mounting plate, a horizontal plate installed in the support plate, a sliding rod passing through the horizontal plate and the support plate, a contraction spring sleeved on the outside of the sliding rod, and a fixed round block connected to the top end of the sliding rod. A hand-tightening locking screw is inserted through the top end of the mounting plate.

[0008] The filter assembly includes a filter processing cover connected to the surface of the fixed circular block, a baffle plate installed inside the filter processing cover and a collecting cone cover, the baffle plate is provided with an inner diversion ring and an outer filter ring on the surface facing the collecting cone cover, the inner side wall of the outer filter ring is attached with a filter mesh, and the outer surface of the filter processing cover is provided with a uniformly distributed first filter mesh.

[0009] Preferably, the support plate is an open isosceles trapezoidal shape, a fixed ring and a sliding ring are provided on the outer side of the sliding rod, the two ends of the contraction spring are respectively connected to the fixed ring and the sliding ring, the sliding ring is consistent with the surface opposite to the horizontal plate, the bottom surface of the fixed circle is provided with a fixed hemisphere, and the support plate is tangent to the fixed hemisphere.

[0010] Preferably, rectangular grooves for the sliding rod to slide are provided on the transverse plate and the support plate, the bottom end of the sliding rod is an inverted "T"-shaped structure, and integrated lips are provided on both side surfaces of the support plate.

[0011] Preferably, a stabilizing ring is provided on the outer side of the air inlet pipe end, and symmetrically distributed connecting rods are provided on the outer surface of the stabilizing ring. A pulley seat is provided on the end of the connecting rod away from the stabilizing ring, and a rolling groove that cooperates with the pulley seat is opened on the lip.

[0012] Preferably, the top of the mounting plate is an "L"-shaped structure, and a limiting groove cooperating with the fixing rod is provided on the surface of the mounting plate facing the support plate, and a locking screw hole for a hand-tightened locking screw to pass through is provided at the top of the limiting groove.

[0013] Preferably, the filtering treatment cover includes an upper annular portion and a lower hemispherical shell portion, the first filter screen is distributed on the surface of the lower hemispherical shell portion, and the collecting cone cover, baffle plate, inner diversion ring and outer filter ring divide the internal space of the filtering treatment cover into an air collecting chamber a, a filter chamber b and a sedimentation chamber c.

[0014] Preferably, a first air hole is provided on the inner diversion ring, a second air hole is provided on the outer filter ring, a third air hole is provided on the circular edge of the baffle plate, and the center of the filter treatment cover, the center of the baffle plate, and the collecting cone cover are on the same axis.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] In the present invention, there is an external filter on the outside of the oxygen detector body to filter impurities in the gas, and the design is convenient for cleaning blocked impurities. Impurities in the oxygen-containing air pass through the first filter screen, the filter mesh, and the outer filter ring. The oxygen-containing air enters the interior of the oxygen detector body after being filtered, thereby achieving the purpose of pre-treating impurities in the oxygen-containing air. The oxygen detector body and the filter processing cover are a combined structure, and the oxygen detector body can be disassembled and assembled, which is convenient for cleaning impurities filtered out of the filter processing cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the three-dimensional structure of the support plate of the present utility model;

[0019] Figure 3 This is a schematic diagram of the top view of the filter processing cover of the present invention;

[0020] Figure 4 This is a schematic diagram of the three-dimensional structure of the filter processing cover of the present invention;

[0021] Figure 5 This is a schematic diagram of the three-dimensional structure of the blocking plate of the present utility model;

[0022] In the figure: 3. Filter processing cover; 5. Mounting plate; 6. Baffle plate; 7. Collecting cone cover; 11. Oxygen detector body; 12. Inlet pipe end; 13. Warning light; 21. Support plate; 22. Horizontal plate; 23. Sliding rod; 24. Contraction spring; 25. Fixed round block; 31. First filter screen; 41. Stabilizing ring; 42. Connecting rod; 43. Pulley seat; 51. Hand-tightening locking screw; 52. Limiting groove; 61. Inner diverter ring; 62. Outer filter ring; 63. Filter mesh; 111. Fixed rod; 211. Lip; 231. Fixed ring; 232. Sliding ring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Example

[0025] See also Figures 1 to 5, The utility model provides a technical solution: a shield tunnel construction safety monitoring device based on water-rich mudstone sand layer, including a water-rich sand layer tunnel oxygen monitoring component, including an oxygen detector body 11 electrically connected to the gas alarm controller A through a wire, an air intake pipe end 12 connected to the inside of the oxygen detector body 11, and an alarm light 13 electrically connected to the oxygen detector body 11. A fixing rod 111 is provided on the top surface of the oxygen detector body 11. Gas enters from the air intake pipe end 12. The oxygen detector body 11 uses an electrochemical reaction to measure the oxygen concentration. The measurement principle is a conventional technical means and is not described in detail in this application; the mounting mechanism includes a mounting plate 5, a support plate 21 connected to the bottom end of the mounting plate 5, a horizontal plate 22 installed in the support plate 21, a sliding rod 23 passing through the horizontal plate 22 and the support plate 21, a contraction spring 24 sleeved on the outside of the sliding rod 23, and a fixed round block 25 connected to the top of the sliding rod 23. A hand-tightening locking screw 51 is passed through the top of the mounting plate 5. The mounting plate 5 is mounted on the inner wall of the tunnel or on the pipeline by conventional means. When the main body 11 is moved, the air inlet pipe end 12 on it is inserted into the interior of the filter processing cover 3, and the fixed round block 25 is pressed down. The contraction spring 24 is in a contracted state, and the oxygen detector main body 11 moves, which can change the position of the oxygen detector main body 11 so that the fixing rod 111 is opposite to the bottom surface of the top of the mounting plate 5; the filter assembly includes a filter processing cover 3 connected to the surface of the fixed round block 25, a blocking plate 6 and a collecting cone cover 7 installed inside the filter processing cover 3, and the filter processing cover 3 plays the role of pre-treating impurities in the oxygen-containing air. An inner diverter ring 61 and an outer filter ring 62 are provided on the surface of the baffle 6 facing the collecting cone cover 7. A filter mesh 63 is attached to the inner wall of the outer filter ring 62. A uniformly distributed first filter mesh 31 is provided on the outer surface of the filter treatment cover 3. The oxygen-containing air passes through the first filter mesh 31 and enters the gas collecting chamber a. Then, the air passes through the inner diverter ring 61 and enters the filter chamber b. After being filtered through the filter mesh 63, it passes through the outer filter ring 62 and enters the sedimentation chamber c. Finally, the air containing oxygen pre-treated by in vitro filtration enters the interior of the oxygen detector body 11.

[0026] In this embodiment, the support plate 21 is an open isosceles trapezoidal shape, and a fixed ring 231 and a sliding ring 232 are provided on the outer side of the sliding rod 23. The two ends of the contraction spring 24 are respectively connected to the fixed ring 231 and the sliding ring 232. When the sliding rod 23 moves vertically downward, the fixed ring 231 squeezes the contraction spring 24, which is conducive to the contraction of the contraction spring 24. The sliding ring 232 is consistent with the surface opposite to the horizontal plate 22. The bottom surface of the fixed circle 25 is provided with a fixed hemisphere. The support plate 21 is tangent to the fixed hemisphere. The friction between the support plate 21 and the fixed hemisphere is small, which is conducive to the movement of the fixed circle 25.

[0027] In this embodiment, rectangular grooves for the sliding rod 23 to slide are provided on the cross plate 22 and the support plate 21. The bottom end of the sliding rod 23 is an inverted "T"-shaped structure. The support plate 21 and the two side surfaces are provided with an integrated lip 211. The support plate 21 is welded to the lip 211. A stabilizing ring 41 is provided on the outer side of the air inlet pipe end 12. A symmetrically distributed connecting rod 42 is provided on the outer surface of the stabilizing ring 41. A pulley seat 43 is provided on the end of the connecting rod 42 away from the stabilizing ring 41. The stabilizing ring 41 is combined with the air inlet pipe end 12 and the connecting rod 42 by a conventional method. The connecting rod 42 is combined with the pulley seat 43 by a conventional method. A rolling groove that cooperates with the pulley seat 43 is provided on the lip 211. When the oxygen detector body 11 is installed, the pulley on the pulley seat 43 rolls in the rolling groove, which is beneficial to the movement of the position of the oxygen detector body 11.

[0028] In this embodiment, the top of the mounting plate 5 is an "L"-shaped structure. A limiting groove 52 is provided on the surface of the mounting plate 5 facing the support plate 21, which cooperates with the fixing rod 111. A locking screw hole is provided at the top of the limiting groove 52 for the hand-tightening locking screw 51 to pass through. The top of the fixing rod 111 is embedded in the interior of the limiting groove 52. The hand-tightening locking screw 51 is rotated and one end of it is inserted into the locking screw hole to fix the fixing rod 111, thereby limiting the oxygen detector body 11.

[0029] In this embodiment, the filter treatment cover 3 includes an upper annular portion and a lower hemispherical shell portion, and the first filter screen 31 is distributed on the surface of the lower hemispherical shell portion. The collecting cone cover 7, the baffle plate 6, the inner diversion ring 61 and the outer filter ring 62 divide the internal space of the filter treatment cover 3 into an air collecting chamber a, a filter chamber b and a sedimentation chamber c. The oxygen-containing air passes through the first filter screen 31 and enters the air collecting chamber a. Then the air passes through the inner diversion ring 61 and enters the filter chamber b. After being filtered through the filter mesh 63, it passes through the outer filter ring 62 and enters the sedimentation chamber c. Finally, the oxygen-containing air pre-filtered in vitro enters the interior of the oxygen detector body 11, achieving the purpose of pre-treating impurities in the oxygen-containing air. A first air hole is provided on the inner diversion ring 61, a second air hole is provided on the outer filter ring 62, and a third air hole is provided at the circular edge of the baffle plate 6, which is conducive to the circulation of oxygen-containing air. The center of the filter treatment cover 3, the center of the baffle plate 6 and the collector cone cover 7 are on the same axis, and the filter treatment cover 3, the baffle plate 6 and the collector cone cover 7 are accurately installed.

[0030] The working principle and use process of this utility model:

[0031] When installing the oxygen detector body 11, first assemble the mounting plate 5 on the inner wall of the water-rich sand layer tunnel or the tunnel pipe by conventional methods;

[0032] When installing the oxygen detector body 11, insert the air inlet pipe end 12 into the filter processing cover 3;

[0033] Press down the oxygen detector body 11, the filter processing cover 3 and the fixed round block 25, the contraction spring 24 is in a contracted state, and the pulley on the pulley seat 43 is in the rolling groove on the lip 211, which is conducive to the movement of the position of the oxygen detector body 11;

[0034] The oxygen detector body 11 moves, changing the position of the oxygen detector body 11, and the pulley on the pulley seat 43 rolls, so that the fixing rod 111 is opposed to the bottom surface of the top end of the mounting plate 5;

[0035] Move the oxygen detector body 11 upward and make the top of the fixing rod 111 fit into the limiting groove 52. Manually tighten the locking screw 51 and insert one end of the fixing screw into the locking screw hole to fix the fixing rod 111, thereby limiting the oxygen detector body 11. At this time, the contraction spring 24 is still in the contracted state. The installation method of the oxygen detector body 11 is simple and easy to assemble and disassemble.

[0036] The oxygen-containing air passes through the first filter screen 31 and enters the air collecting chamber a in the filter processing cover 3. The air then passes through the inner diversion ring 61 and enters the filter chamber b. After being filtered by the filter mesh 63, it passes through the outer filter ring 62 and enters the sedimentation chamber c. Finally, the air pre-filtered in vitro enters the interior of the oxygen detector body 11, achieving the purpose of pre-treating impurities in the oxygen-containing air.

[0037] To sum up, in the safety monitoring device of the present application, the outside of the oxygen detector body 11 has an in vitro filter for filtering impurities in the gas, and is designed to facilitate the cleaning of blocked impurities. Impurities in the oxygen-containing air pass through the first filter 31, the filter mesh 63, and the outer filter ring 62. The oxygen-containing air enters the interior of the oxygen detector body 11 after filtration, thereby achieving the purpose of pre-treating impurities in the oxygen-containing air. The oxygen detector body 11 and the filter processing cover 3 are a combined structure, and the oxygen detector body 11 can be disassembled and assembled, which is convenient for cleaning impurities filtered out of the filter processing cover 3.

[0038] Although embodiments of the present invention have been shown and described (see the detailed description above for details), it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A safety monitoring device for shield tunnel construction in a water-rich mudstone sand layer, characterized by: include An oxygen monitoring assembly for a water-rich sand layer tunnel comprises an oxygen detector body (11) electrically connected to a gas alarm controller A via a wire, an air inlet pipe end (12) communicating with the interior of the oxygen detector body (11), and an alarm light (13) electrically connected to the oxygen detector body (11); a fixing rod (111) is provided on the top surface of the oxygen detector body (11); The mounting mechanism comprises a mounting plate (5), a support plate (21) connected to the bottom end of the mounting plate (5), a transverse plate (22) mounted in the support plate (21), a sliding rod (23) passing through the transverse plate (22) and the support plate (21), a contraction spring (24) sleeved on the outside of the sliding rod (23), and a fixed round block (25) connected to the top end of the sliding rod (23); a hand-tightening locking screw (51) passes through the top end of the mounting plate (5); The filter assembly comprises a filter processing cover (3) connected to the surface of a fixed circular block (25), a baffle plate (6) installed inside the filter processing cover (3) and a flow collecting cone cover (7), wherein the baffle plate (6) is provided with an inner diversion ring (61) and an outer filter ring (62) on the surface facing the flow collecting cone cover (7), a filter mesh (63) is attached to the inner side wall of the outer filter ring (62), and a first filter mesh (31) is evenly distributed on the outer surface of the filter processing cover (3).

2. The device for monitoring shield tunnel construction safety in a water-rich mudstone sand layer according to claim 1, characterized in that: The support plate (21) is in the shape of an open isosceles trapezoid. A fixed ring (231) and a sliding ring (232) are provided on the outer side of the sliding rod (23). The two ends of the contraction spring (24) are respectively connected to the fixed ring (231) and the sliding ring (232). The sliding ring (232) is aligned with the surface opposite to the horizontal plate (22). A fixed hemisphere is provided on the bottom surface of the fixed circular block (25). The support plate (21) is tangent to the fixed hemisphere.

3. The device for monitoring shield tunnel construction safety in a water-rich mudstone sand layer according to claim 1, characterized in that: The transverse plate (22) and the support plate (21) are provided with rectangular grooves for the sliding rod (23) to slide. The bottom end of the sliding rod (23) is an inverted "T"-shaped structure. The surfaces of both sides of the support plate (21) are provided with integrated lips (211).

4. The device for monitoring shield tunnel construction safety in a water-rich mudstone sand layer according to claim 3, characterized in that: The outer side of the air inlet pipe end (12) is provided with a stabilizing ring (41), the outer surface of the stabilizing ring (41) is provided with symmetrically distributed connecting rods (42), the end of the connecting rod (42) away from the stabilizing ring (41) is provided with a pulley seat (43), and the lip (211) is provided with a rolling groove that cooperates with the pulley seat (43).

5. The device for monitoring shield tunnel construction safety in a water-rich mudstone sand layer according to claim 1, characterized in that: The top of the mounting plate (5) is an "L"-shaped structure. A limiting groove (52) cooperating with the fixing rod (111) is provided on the surface of the mounting plate (5) facing the support plate (21). A locking screw hole for a hand-tightening locking screw (51) to pass through is provided at the top of the limiting groove (52).

6. The device for monitoring shield tunnel construction safety in a water-rich mudstone sand layer according to claim 1, characterized in that: The filtering and processing cover (3) comprises an upper annular portion and a lower hemispherical shell portion, the first filter screen (31) is distributed on the surface of the lower hemispherical shell portion, and the collecting cone cover (7), the blocking plate (6), the inner diversion ring (61) and the outer filtering ring (62) divide the internal space of the filtering and processing cover (3) into a gas collecting chamber a, a filtering chamber b and a sedimentation chamber c.

7. The device for monitoring shield tunnel construction safety in a water-rich mudstone sand layer according to claim 1, characterized in that: The inner flow dividing ring (61) is provided with a first air hole, the outer filter ring (62) is provided with a second air hole, and the circular edge of the blocking plate (6) is provided with a third air hole. The center of the filtering cover (3), the center of the blocking plate (6), and the collecting cone cover (7) are located on the same axis.

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