Follow-up type automatic dust removal system for extra-long TBM tunnel secondary lining trolley

Abstract

The utility model provides a follow-up automatic dust removal system for a secondary lining trolley of an extra-long TBM tunnel. The follow-up automatic dust removal system comprises the secondary lining trolley, a spraying dust removal assembly and an air inducing assembly, wherein the spraying dust removal assembly and the air inducing assembly are arranged on the secondary lining trolley; according to the arrangement mode, additional arrangement on the tracked ground is not needed, the tunnel construction space is occupied, the time spent on disassembly is shortened, synchronous movement can be achieved along with propelling of the secondary lining trolley, and the construction efficiency is improved; the mode of automatically starting dust removal is adopted, and the dust concentration in the current air is obtained through a dust concentration sensor for starting; the spraying solution containing the dedusting agent in the water tank is atomized and sprayed out, the adsorption and condensation effect on fine dust is enhanced, the dedusting effect is improved, and continuous diffusion of dust generated during construction to a tunnel outlet can be effectively controlled and inhibited; the problem of slow air retention caused by the fact that the secondary lining trolley reduces the tunnel overflowing space can be solved, the dust removal effect, the air flowing speed, the air quality and the like of the tunnel outlet side are improved, and the device is particularly suitable for an extra-long TBM tunnel.

Description

TECHNICAL FIELD

[0001] The utility model relates to TBM tunnel dust removal technical field especially relates to a long TBM tunnel secondary lining trolley follow -up type automatic dust removal system. BACKGROUND

[0002] Full face rock tunnel boring machine (TBM) becomes the core equipment of excavating long distance rock tunnel by virtue of its fast, high quality, safety and other advantages. With the wide application of TBM in tunnel construction, TBM engineering overcoming complex and changeable geological conditions is increasingly common. For some deep buried long distance tunnels in complex and harsh environment, the working environment in the tunnel is deteriorated due to ventilation difficulty, which often seriously affects the engineering quality and construction progress, on the other hand, also indirectly restricts the development of tunnel mechanized construction technology. Therefore, corresponding research is carried out on tunnel secondary lining trolley follow -up type automatic dust removal for TBM tunnel construction dust environment, air quality is improved, and construction efficiency is ensured. UTILITY MODEL CONTENTS

[0003] The utility model aims at the insufficient of above -mentioned background art, provides a kind of long TBM tunnel construction based on secondary lining trolley follow -up type automatic dust removal scheme, solve the problem of ventilation air quality and visibility decline caused by the dust removal difficulty, insufficient return air volume, difficult to take dust removal measures on rail ground etc. of existing ventilation dust removal scheme in long distance TBM tunnel construction.

[0004] In order to achieve the above purpose, the utility model provides a long TBM tunnel secondary lining trolley follow -up type automatic dust removal system, including secondary lining trolley, spray dust removal component and air induction component being arranged on the secondary lining trolley;

[0005] The spray dust removal component includes water jet nozzle, pipeline, high pressure water pump, water tank and controller, the water jet nozzle is provided with multiple, is connected with the secondary lining trolley, and is located at the side of the secondary lining trolley close to tunnel boring direction, the water jet nozzle is communicated with the high pressure water pump by the pipeline, the high pressure water pump is communicated with the water tank by the pipeline, the water tank stores liquid, and the controller is used to control system;

[0006] The air induction component includes fan and air pipe, the fan is arranged at the preset position of the air pipe, the air pipe has air inlet end and air outlet end, the air inlet end of the air pipe is located at the side of the secondary lining trolley away from tunnel boring direction, and the air outlet end of the air pipe is located at the side close to tunnel boring direction.

[0007] Further, the pipeline includes water supply pipe and flexible water pipe, the water supply pipe is communicated with the water jet nozzle and the high pressure water pump, and the flexible water pipe is communicated with the high pressure water pump and the water tank.

[0008] Further, the number of the water jet nozzles is preset to generate full-section water mist consistent with the tunnel shape.

[0009] Further, the water jet nozzle is a conical nozzle, the inside of the nozzle body is conical to form a conical jet by changing the flow channel from narrow to wide, and the liquid flow is atomized to achieve wide jet.

[0010] Further, the water jet nozzle is provided with a universal adjusting member to adjust the jet direction and angle of the single water jet nozzle.

[0011] Further, the pipeline is provided with a pressure sensor for monitoring the pressure value in the pipeline.

[0012] Further, the pipeline is provided with a solenoid valve capable of adjusting the opening degree.

[0013] Further, the liquid stored in the water tank is a spray solution containing a dust removal agent, and the water tank is provided with a filtering structure.

[0014] Further, the controller is installed on the outer surface of the water tank, and the controller comprises a PLC control module, a touch screen, an intermediate relay, an emergency stop switch and an indicator light, and the secondary lining trolley is further provided with a dust concentration sensor for monitoring the dust concentration of the current tunnel construction area.

[0015] Further, the air induction assembly is provided with two groups, respectively located on the two sides of the secondary lining trolley.

[0016] The above scheme of the utility model has the following beneficial effects:

[0017] The special long TBM tunnel secondary lining trolley follow-up type automatic dust removal system provided by the utility model installs the water jet nozzle and the matched devices on the secondary lining trolley, does not need to be additionally arranged on the track ground, occupies the tunnel construction space, reduces the time spent in dismounting, can move synchronously with the advancement of the secondary lining trolley, improves the construction efficiency, adopts the automatic starting dust removal mode, obtains the dust concentration in the current air through the dust concentration sensor, and the like, atomizes and sprays the spray solution with the dust removal agent in the water tank, enhances the adsorption and condensation effect on fine dust, improves the dust removal effect, can effectively control and inhibit the continuous diffusion of dust generated during construction to the tunnel outlet, simultaneously, through the arrangement of the air induction assembly, the problem of slow air retention caused by the reduction of the tunnel flow space by the secondary lining trolley can be improved, the dust removal effect, air flow speed and air quality on the side of the tunnel outlet are improved, and the like, and the utility model is especially suitable for the special long TBM tunnel.

[0018] Other beneficial effects of the utility model will be described in detail in the subsequent specific embodiment part. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the overall structure end face of this utility model;

[0021] Figure 3 This is a schematic diagram of the water jet nozzle of this utility model;

[0022] Figure 4 This is a schematic diagram of the air intake component of this utility model.

[0023] [Explanation of Labels in the Attached Image]

[0024] 1-Secondary lining trolley; 2-Water jet nozzle; 3-Water supply pipe; 4-High-pressure water pump; 5-Flexible water pipe; 6-Water tank; 7-Controller; 8-Fan; 9-Air duct. Detailed Implementation

[0025] To make the technical problems, solutions, and advantages of this utility model clearer, a detailed description will be provided below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, the term "installation", "connection", "connect" should do the broad sense understanding, for example, can be the locking connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through the intermediate medium, can be two elements inside the intercommunication, for the ordinary skilled in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to the specific circumstances.

[0028] As Figure 1 , Figure 2 The embodiment of the utility model provides a special long TBM tunnel secondary lining trolley servo type automatic dust removal system, including secondary lining trolley 1 and spray dust removal subassembly. Wherein, spray dust removal subassembly sets up in secondary lining trolley 1, realizes the servo type dust removal in the tunnel.

[0029] In the embodiment, spray dust removal subassembly includes water jet nozzle 2, water supply pipe 3, high pressure water pump 4, flexible water pipe 5, water tank 6 and controller 7. Wherein, water jet nozzle 2 sets up in the preset position of secondary lining trolley 1, water jet nozzle 2 is communicated with high pressure water pump 4 through water supply pipe 3, high pressure water pump 4 is communicated with water tank 6 through flexible water pipe 5, of course, can also be directly set in water tank 6. Under the action of high pressure water pump, the liquid stored in water tank 6 is ejected through water jet nozzle 2, and water jet nozzle 2 can atomize the liquid flow to a certain extent, thereby cooling the dust area, increasing the humidity of air and preliminarily mixing with dust, and weakening the phenomenon of dust flying. Controller 7 is used to control the whole system.

[0030] In the embodiment, water jet nozzle 2 is arranged on the side of secondary lining trolley 1 close to the tunnel excavation direction, and is specifically installed on the steel frame of secondary lining trolley 1. A reasonable number of water jet nozzles 2 can be arranged on the steel frame of secondary lining trolley 1 according to the size of the tunnel section. Preferably, a large number of water jet nozzles 2 are arranged to generate full-section water mist consistent with the shape of the tunnel, thereby achieving the effect of sufficient cooling and dust removal.

[0031] At the same time as Figure 3 Indicated, in a specific embodiment of the embodiment, the water jet nozzle 2 is a conical nozzle, and the throat pipe of the water jet nozzle 2 is connected with the nozzle body for conveying clean water flow. The inside of the nozzle body is a conical space, and the change from narrow to wide of the flow channel forms a conical jet effect, atomizes the liquid flow to a certain extent, and realizes the ejection of a large range. As a preferred embodiment, the water jet nozzle 2 in the embodiment can be further configured with a universal adjusting member to adjust the jet direction and angle of the single water jet nozzle 2, and the adjustment range can be-20°~20°, etc., to realize sufficient dead-angle-free jetting.

[0032] Understandably, after installation, the water jet nozzles 2 on the outer ring of the secondary lining trolley 1 are relatively close to the tunnel wall. When lining the tunnel wall, to avoid the water mist carrying moisture adversely affecting the lining quality and worker efficiency, they need to be appropriately deflected towards the center of the tunnel axis to reduce direct liquid flow. The water jet nozzles 2 on the inner ring are close to the center of the tunnel. When diesel locomotives or other vehicles pass through the middle of the tunnel, to avoid adversely affecting their normal driving and driver visibility, the corresponding water jet nozzles 2 must be reduced or turned off in a timely manner.

[0033] In this embodiment, the water supply pipe 3 is also arranged on the steel frame on the corresponding side of the secondary lining trolley 1. It includes an inlet end and an outlet end. The inlet end is connected to the high-pressure water pump 4 to obtain pressurized water supply. The outlet end is connected to the corresponding water jet nozzle 2 to provide water source. The flexible water pipe 5 is used to connect the water supply pipe 4 and the high-pressure water pump 4. The flexible water pipe 5 can adopt a design to enhance sealing and prevent leakage, avoiding leakage under high pressure. At the same time, copper connectors can be used at both ends of the flexible water pipe 5, and the nuts at the connection are tightened with a wrench to ensure that the pressurized liquid does not leak from the connection. In addition, a pressure sensor can be further configured in the flexible water pipe 5 to monitor the pressure value in the pipeline, thereby regulating the pressure. One specific regulation method is to install a solenoid valve on the water supply pipe 3, which is controlled by a PLC. Based on the pressure monitored by the pressure sensor, constant pressure variable flow control of the water flow is achieved to ensure that the water pressure reaches the atomization standard.

[0034] In an optional embodiment of this example, the working water pressure of a single water jet nozzle 2 is set to 0.3 MPa or higher, the entire nozzle is made of composite stainless steel, and the water flow rate is 3 L / min. The diameter of the water supply pipe 3 is at least 40 mm. Preferably, different sections of the water supply pipe 3 are connected using flat-welded flanges. After the connection is completed, the sealing and pressure of the connection are further checked. Leakage can be checked by observation, touch, or the use of professional testing tools.

[0035] In one specific embodiment of this example, the high-pressure water pump 4 is installed at the bottom of the secondary lining trolley 1, and the water tank 6 is installed in front of the high-pressure water pump 4 as a water storage location. Optionally, the liquid stored in the water tank 6 mainly consists of a spray solution containing a dust removal agent, and the interior can be further designed with a quartz sand filter plate, etc., to prevent particles from entering the pipeline and causing blockage of the water jet nozzle 2, thus affecting normal use.

[0036] It should be noted that the flow rate of high-pressure water pump 4 should be determined based on the installation size, required water volume, and design effect, and powered by an AC motor. The head of high-pressure water pump 4 should also be selected considering design requirements to ensure that it can lift the liquid to a height of at least 8 meters.

[0037] In an optional embodiment of the present embodiment, the water tank 6 has a size of 1500mmx800mmx1000mm, and can generally store about 1200L of liquid. The dust removal agent of the spraying solution in the water tank 6 can be made of 0.5% NaCl, 0.5% polyethylene glycol, and 0.5% sodium dodecyl benzene sulfonate, and has good dust removal effect.

[0038] In a specific embodiment of the present embodiment, the controller 7 is installed on the surface of the water tank 6, and can specifically include a PLC control module, a touch screen, an intermediate relay, an emergency stop switch, and an indicator light. Being arranged at this position is convenient for the operator to view and operate, etc. The spraying size and spraying distance of the water jet nozzle 2 are adjusted (preset) to control the spraying pressure, etc.

[0039] As a preferred embodiment, the dust concentration sensor is further arranged on the two-formwork trolley 1 in the present embodiment, which is used to monitor the dust concentration of the current tunnel construction area. Therefore, when the dust concentration reaches above the construction standard requirement, an electric signal can be transmitted to the control center, so that the system starts the spraying dust removal operation.

[0040] In the present embodiment, the long TBM tunnel two-formwork trolley follow-up type automatic dust removal system further includes an air guide assembly. As shown in Figure 4 , the air guide assembly specifically includes a fan 8 and an air pipe 9. The air pipe 9 has an air inlet end and an air outlet end, and the fan 8 is arranged at a preset position of the air pipe 9, for example, can be arranged at the air inlet end thereof. The air inlet end of the air pipe 9 is located on the side of the two-formwork trolley 1 away from the tunnel excavation direction, i.e. close to the tunnel outlet direction. The air pipe 9 penetrates through the entire two-formwork trolley 1, so that the air outlet end is located on the side close to the tunnel excavation direction. Therefore, under the action of the fan, the air with high dust concentration on the side of the two-formwork trolley 1 away from the tunnel excavation direction can be introduced to the side of the water jet nozzle, so as to strengthen the dust removal effect in the entire tunnel, improve the problem of slow air retention caused by the two-formwork trolley 1 reducing the tunnel flow space, improve the air flow rate in this area, and realize omnidirectional and efficient cooling and dust removal.

[0041] As a preferred embodiment, two groups of the fan 8 and the air pipe 9 are arranged on the two sides of the two-formwork trolley 1 in the present embodiment, so as to further strengthen the air introduction efficiency and achieve better cooling and dust removal effect. Correspondingly, the two air outlet ends are also located on the two sides of the two-formwork trolley 1. Optionally, the diameter of the air pipe 9 is set to be more than 900mm, and the fan 8 adopts an axial flow form, i.e. the airflow direction is the same as the shaft direction of the fan blade. Through the two fans 8 on the two sides of the two-formwork trolley 1, the overall air supply amount is not less than 700m 3 / min.

[0042] The long TBM tunnel secondary lining trolley follow-up type automatic dust removal system provided by the embodiment is installed on the secondary lining trolley 1, and does not need to be additionally arranged on the track ground, occupies the tunnel construction space, reduces the time spent on disassembly, and can move synchronously with the advancement of the secondary lining trolley 1, thereby improving the construction efficiency; the automatic starting dust removal mode is adopted, the dust concentration sensor is used to obtain the dust concentration in the current air, and the like; the spray solution with the dust removal agent in the water tank 6 is atomized and sprayed out, the adsorption and condensation effect on fine dust is enhanced, the dust removal effect is improved, the dust generated during construction can be effectively controlled and inhibited from continuing to spread to the tunnel outlet; meanwhile, the air slow retention problem caused by the secondary lining trolley 1 reducing the tunnel flow space can be improved by the air induction assembly, the dust removal effect, air flow speed, air quality, and the like at the tunnel outlet side are improved, and the long TBM tunnel is especially suitable.

[0043] Before the spray dust removal is performed, whether to be implemented is determined by the dust concentration sensor monitoring value and the on-site construction condition; under the premise of determining to perform the spray dust removal, the controller 7 is used to adjust the opening and closing state of the entire spray dust removal assembly, the water amount is set in stages: 20%, 40%, 60%, 80%, and 100%; secondly, the two air blowers are started by the controller to improve the air flow slow retention problem; finally, the system is closed in time after the dust concentration in the construction area is reduced and the air quality is improved, and the complete spray dust removal process is realized.

[0044] The technical features of the above embodiments can be combined in any manner, and to make the description concise, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the description.

[0045] The above embodiments only express several implementation manners of the application, the description is relatively specific and detailed, but it should not be understood as a limitation on the application scope. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the application, a number of modifications and improvements can be made, which are within the protection scope of the application. Therefore, the protection scope of the application should be subject to the appended claims.

Claims

1. A long TBM tunnel secondary lining trolley follow-up type automatic dust removal system, characterized in that, The utility model provides a two-lining trolley, a spray dust removal assembly arranged on the two-lining trolley and an air guide assembly. The spray dust removal assembly comprises water jet nozzles, pipelines, a high-pressure water pump, a water tank and a controller. The water jet nozzles are arranged on the two-lining trolley and located on the side of the two-lining trolley close to the tunnel excavation direction.

2. The long TBM tunnel secondary lining trolley follow-up automatic dust removal system according to claim 1, characterized in that, The high-pressure water pump is connected to the water tank through the pipelines.

3. The long TBM tunnel secondary lining trolley follow-up automatic dust removal system according to claim 1, characterized in that, The number of the water jet nozzles is a preset number to generate water mist consistent with the shape of the tunnel.

4. The long TBM tunnel secondary lining trolley follow-up automatic dust removal system according to claim 1, characterized in that, The water jet nozzles are conical nozzles.

5. The long TBM tunnel secondary lining trolley follow-up automatic dust removal system according to claim 1, characterized in that, The inside of the nozzle body of the water jet nozzles is conical to form conical jetting by changing the flow channel from narrow to wide.

6. The long TBM tunnel secondary lining trolley follow-up automatic dust removal system according to claim 1, characterized in that, The water jet nozzles are provided with universal adjusting members to adjust the jetting direction and angle of each water jet nozzle.

7. The long TBM tunnel secondary lining trolley follow-up automatic dust removal system according to claim 6, characterized in that, The pipelines are provided with pressure sensors to monitor the pressure value in the pipelines.

8. The long TBM tunnel secondary lining trolley follow-up automatic dust removal system according to claim 1, characterized in that, The pipelines are provided with electromagnetic valves to adjust the opening degree.

9. The long TBM tunnel secondary lining trolley follow-up automatic dust removal system according to claim 1, characterized in that, The liquid stored in the water tank is a spray solution containing a dust removal agent.

10. The long TBM tunnel secondary lining trolley follow-up automatic dust removal system according to claim 1, characterized in that, The water tank is provided with a filter structure. The controller is installed on the outer surface of the water tank. The controller comprises a PLC control module, a touch screen, an intermediate relay, an emergency stop switch and an indicator light. The two-lining trolley is also provided with a dust concentration sensor to monitor the dust concentration in the current tunnel construction area. The air guide assembly is arranged in two groups on the two sides of the two-lining trolley.

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