A cleaning device for earth cavity pressure sensors

Abstract

The utility model discloses a kind of cleaning devices for earth bunker pressure sensor, be set on earth bunker bulkhead, and earth bunker bulkhead is provided with earth bunker pressure sensor;Including flushing cavity, be set on earth bunker bulkhead, and flushing cavity is close to earth bunker pressure sensor side and is equipped with multiple water jet openings;Water supply component, be set on the rear end of earth bunker bulkhead and be communicated with flushing cavity.The utility model solves the mode of the existing cleaning earth bunker pressure sensor is more troublesome, possibly still can cause the problem of earth bunker pressure loss and surface subsidence, by setting flushing cavity and water supply component, operator can quickly, conveniently clean the muck covered by earth bunker pressure sensor.This device avoids earth bunker pressure loss when disassembling earth pressure sensor, can effectively control surface subsidence.

Description

Technical Field

[0001] This utility model relates to the field of tunnel boring machine construction technology, specifically to a cleaning device for a soil chamber pressure sensor. Background Technology

[0002] Soil chamber pressure sensors are typically installed on the soil chamber baffle where the shield of the tunnel boring machine contacts the excavated soil, or on the cylinder wall of the screw conveyor, to monitor pressure changes within the soil chamber in real time.

[0003] After the soil pressure sensor is installed, during the tunnel boring machine's excavation process, the soil in the soil chamber will cover the probe surface of the soil pressure sensor, forming a clogging, which will cause the soil pressure data monitored by the soil pressure sensor to be inaccurate. Currently, to clean the soil, the soil pressure sensor must be disassembled. However, disassembling the soil pressure sensor may cause the soil chamber to lose pressure, making it difficult to control surface subsidence. Utility Model Content

[0004] The technical problem this invention aims to solve is that existing methods for cleaning soil chamber pressure sensors are cumbersome and may lead to soil chamber depressurization and surface subsidence. The purpose is to provide a cleaning device for soil chamber pressure sensors. This utility model is achieved through the following technical solution: A cleaning device for a soil chamber pressure sensor is installed on a soil chamber partition, wherein the soil chamber pressure sensor is installed on the soil chamber partition; comprising: A flushing chamber is installed on the partition of the soil chamber, and multiple water spray nozzles are opened on the side of the flushing chamber near the soil chamber pressure sensor. The water supply component is located at the rear end of the earth chamber partition and is connected to the flushing chamber.

[0005] As one of the preferred technical solutions, the flushing chamber has a fan-shaped structure to match the shape of the soil chamber pressure sensor.

[0006] As one of the preferred technical solutions, the earth chamber partition is provided with an inlet, and a threaded connector is installed in the inlet. One end of the threaded connector is connected to the flushing chamber, and the other end is connected to the water supply assembly.

[0007] As one of the preferred technical solutions, the water nozzle is connected to a filter screen.

[0008] As one of the preferred technical solutions, the flushing chamber is located above the soil chamber pressure sensor.

[0009] As one of the preferred technical solutions, the flushing chamber is equipped with ribs.

[0010] As one of the preferred technical solutions, the water supply assembly includes a ball valve and a high-pressure flushing pipe, wherein the ball valve is connected to a threaded connector and the high-pressure flushing pipe is connected to the other end of the ball valve.

[0011] As one of the preferred technical solutions, a control component is also connected between the ball valve and the high-pressure water pipe to control the opening and closing of the high-pressure water.

[0012] As one of the preferred technical solutions, the control component includes a solenoid valve and a controller, wherein the solenoid valve is installed at one end of the ball valve and the controller is electrically connected to the solenoid valve.

[0013] As one of the preferred technical solutions, the material of the threaded connector is a corrosion-resistant material.

[0014] Compared with the prior art, this utility model has the following advantages and beneficial effects: 1. By setting up a flushing chamber and water supply components, operators can quickly and conveniently clean the slag covered by the pressure sensor in the soil chamber.

[0015] 2. This device avoids the loss of soil pressure in the soil chamber when the soil pressure sensor is disassembled, and can effectively control surface settlement. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings: Figure 1 This is a top view of the earth storage partition of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model; Figure 3 This is a schematic diagram of the flushing chamber of this utility model.

[0017] The attached diagram shows the markings and corresponding component names: 1-Soil chamber partition, 2-Soil chamber pressure sensor, 3-Flush chamber, 4-Water nozzle, 5-Water supply assembly, 51-Ball valve, 52-High-pressure flushing pipe, 6-Threaded connector, 7-Filter screen, 8-Solenoid valve. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0019] In the existing technology, after the soil pressure sensor 2 is installed, during the tunnel boring machine's excavation process, the soil in the soil chamber will cover the probe surface of the soil pressure sensor 2, forming a wrapping, which makes the soil pressure data monitored by the soil pressure sensor 2 inaccurate. Currently, cleaning the soil requires disassembling the soil pressure sensor before it can be done. However, disassembling the soil pressure sensor 2 may cause the soil chamber to lose pressure, making it difficult to control surface subsidence.

[0020] This embodiment provides a cleaning device for a soil chamber pressure sensor, which is installed on a soil chamber partition 1, and a soil chamber pressure sensor 2 is installed on the soil chamber partition 1; as follows: Figure 1 and Figure 2 As shown, it includes: The flushing chamber 3 is set on the soil chamber partition 1, and the flushing chamber 3 has multiple water spray nozzles 4 on the side near the soil chamber pressure sensor 2. Water supply component 5 is located at the rear end of earth chamber partition 1 and is connected to flushing chamber 3.

[0021] In this embodiment, the flushing chamber 3 is located on the right side of the soil pressure sensor 2, and multiple water nozzles 4 are evenly arranged on the left side of the flushing chamber 3. The water nozzles 4 are aimed at the surface of the soil pressure sensor 2, and the water supply assembly 5 supplies water to the flushing chamber 3. Finally, the cleaning water is sprayed out from the water nozzles 4 to wash the soil pressure sensor 2, ensuring the accuracy of subsequent monitoring by the soil pressure sensor 2. By setting up the flushing chamber 3 and the water supply assembly 5, operators can clean the soil covering the soil pressure sensor without disassembling the soil pressure sensor, which is convenient and quick, while ensuring that the soil chamber does not lose pressure when cleaning the soil pressure sensor.

[0022] In another embodiment, the flushing chamber 3 has a fan-shaped structure to match the shape of the soil chamber pressure sensor 2.

[0023] It is known that the fan-shaped structure can increase the spray range of the nozzle 4 and improve the cleaning efficiency of the surface of the pressure sensor 2 in the soil chamber. In addition, the fan-shaped structure can form a fan-shaped water curtain or a fan-shaped jet surface, making the water flow more evenly distributed within the rinsing area. This uniform rinsing effect ensures that all parts of the surface of the object being rinsed are thoroughly cleaned, avoiding blind spots or incomplete rinsing.

[0024] Furthermore, the fan-shaped structure has a larger spray angle, enabling wide-angle coverage. This means that, at the same rinsing distance, the fan-shaped structure can cover a larger area, improving rinsing efficiency.

[0025] In another embodiment, the earth chamber partition 1 is provided with an inlet, and a threaded connector 6 is installed in the inlet. One end of the threaded connector 6 is connected to the flushing chamber 3, and the other end is connected to the water supply assembly 5.

[0026] In this embodiment, the inlet diameter is 50mm, and the threaded connector 6 has a pipe diameter of 50mm and a length of 100mm. The threaded connector 6 is welded to the inlet to ensure quick connection between the flushing chamber 3 and the water supply assembly 5, ensuring their compatibility. Furthermore, the threaded connector 6 uses a standardized thread design (such as NPT thread), ensuring a tight and secure connection that is not prone to loosening or leakage.

[0027] Furthermore, the material of the threaded connector 6 in this embodiment is a corrosion-resistant material.

[0028] The surface of the threaded connector 6 is covered with a zinc plating layer. This zinc plating layer, through a sacrificial anode protection mechanism, preferentially reacts with corrosive media (such as oxygen and chloride ions) in the air and moisture, preventing direct corrosion of the threaded connector 6 substrate and improving its corrosion resistance. In humid and high-salt-spray environments, the zinc plating layer can significantly extend the service life of the threaded connector 6.

[0029] As another implementation method, such as Figure 3 As shown, to prevent the water nozzle 4 from clogging, it is configured such that a filter screen 7 is connected to the water nozzle 4. The physical barrier of the filter screen 7 prevents sand and soil from entering the flushing chamber 3 and causing contamination and clogging. However, during flushing, the washing water can quickly wash away the debris covering one side of the filter screen 7.

[0030] In another embodiment, the flushing chamber 3 is located above the soil pressure sensor 2. Specifically, the flushing chamber 3 is located to the upper right of the soil pressure sensor 2, with a height of 20mm. Additionally, the water spray nozzle 4 can accurately position the slag covering the soil pressure sensor 2.

[0031] In another implementation, to prevent the flushing chamber 3 from being squeezed and deformed, a stiffening plate is installed inside the flushing chamber 3. Specifically, the stiffening plate increases local stiffness, limiting the deformation of the flushing chamber 3 structure under stress; by enhancing the structural strength through the stiffening plate, the main wall thickness can be reduced.

[0032] In another embodiment, the water supply assembly 5 includes a ball valve 51 and a high-pressure flushing pipe 52. The ball valve 51 is connected to a threaded connector 6, and the high-pressure flushing pipe 52 is connected to the other end of the ball valve 51.

[0033] Specifically, the high-pressure flushing pipe 52 is connected to a high-pressure water source. The ball valve 51 has a through-hole on its ball. When the ball rotates to align the through-hole with the valve body passage, fluid can pass smoothly; when the ball rotates to make the through-hole perpendicular to the valve body passage, the fluid passage is cut off. The ball valve 51 has a nominal diameter of 50mm. A sealing material is typically used to seal the ball and seat of the ball valve 51. When the ball is closed, it effectively prevents fluid leakage, achieving good sealing and isolation effects.

[0034] In another embodiment, a control component is also connected between the ball valve 51 and the high-pressure water pipe to control the opening and closing of the high-pressure water.

[0035] Furthermore, the control component includes a solenoid valve 8 and a controller, wherein the solenoid valve 8 is installed at one end of the ball valve 51, and the controller is electrically connected to the solenoid valve 8.

[0036] In this embodiment, the nominal diameter of the solenoid valve 8 is 50mm. It is known that the controller is located in the main control room, and the solenoid valve 8 has remote communication capabilities. The solenoid valve 8's wiring is connected to the main control room, ensuring correct power and signal line connections. Operators can control the solenoid valve 8 by using operation buttons.

[0037] The technical advantages are as follows: This device is easy to use; operators can remotely control it from the main control room to perform high-pressure water flushing, thereby ensuring the accuracy of the soil pressure sensor's detection. This remote control feature is existing technology and will not be described in detail further.

[0038] Solenoid valve 8 is used in conjunction with ball valve 51, so that ball valve 51 can still maintain the pressure in the soil chamber and prevent pressure leakage when solenoid valve 8 is under maintenance.

[0039] The installation steps for the cleaning device of this utility model are as follows: Before the tunnel boring machine leaves the factory (or before it starts operation), a 50mm diameter access hole needs to be opened on the right side of the soil chamber pressure sensor 2 on the soil chamber bulkhead. The opening should be as close as possible to the soil chamber pressure sensor 2 to facilitate subsequent dredging and flushing.

[0040] Additionally, a flushing chamber 3 is fabricated at the front end of the soil chamber bulkhead using a 10mm thick steel plate. The flushing chamber 3 has a fan-shaped structure.

[0041] When welding the flushing chamber 3, the earth pressure sensor must be removed to prevent the welding heat from damaging it. During welding, the paint around the weld must be thoroughly cleaned to ensure that the weld is free of slag inclusions, porosity, etc.

[0042] To ensure the force of high-pressure water rinsing, the height of rinsing chamber 3 is set at 20mm, and the size of spray nozzle 4 is minimized as much as possible.

[0043] To prevent the fan-shaped flushing device from being squeezed and deformed, stiffening plates can be used for reinforcement. After completion, the flushing chamber 3 should be painted for rust prevention.

[0044] At the rear end of the earth chamber partition, a galvanized threaded connector 6 with a length of 100mm and a pipe diameter of 50mm is used for welding at the opening.

[0045] After the threaded connector 6 is welded, a ball valve 51 with a nominal diameter of 50mm is installed at its rear end. This ball valve can be closed when the solenoid valve 8 is being maintained to prevent depressurization of the soil chamber.

[0046] After ball valve 51 is installed, a solenoid valve 8 with a nominal diameter of 50mm is installed after it, and its wiring is connected to the main control room. The main operator can control its on / off state via operating buttons. The high-pressure water required for flushing can be obtained from the high-pressure flushing pipe 52 of the tunnel boring machine. After all components are installed, the earth pressure sensor can be reinstalled.

[0047] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A cleaning device for a soil chamber pressure sensor, disposed on a soil chamber partition, wherein a soil chamber pressure sensor is disposed on the soil chamber partition; characterized in that, include: A flushing chamber is installed on the partition of the soil chamber, and multiple water spray nozzles are opened on the side of the flushing chamber near the soil chamber pressure sensor. The water supply component is located at the rear end of the earth chamber partition and is connected to the flushing chamber.

2. The cleaning device for a soil chamber pressure sensor according to claim 1, characterized in that, The flushing chamber has a fan-shaped structure to match the shape of the soil chamber pressure sensor.

3. The cleaning device for a soil chamber pressure sensor according to claim 1, characterized in that, The earth chamber partition has an inlet, and a threaded connector is installed in the inlet. One end of the threaded connector is connected to the flushing chamber, and the other end is connected to the water supply assembly.

4. The cleaning device for a soil chamber pressure sensor according to claim 1, characterized in that, The water nozzle is connected to a filter screen.

5. The cleaning device for a soil chamber pressure sensor according to claim 1, characterized in that, The flushing chamber is located above the soil chamber pressure sensor.

6. The cleaning device for a soil chamber pressure sensor according to claim 1, characterized in that, The flushing chamber is equipped with reinforcing plates.

7. The cleaning device for a soil chamber pressure sensor according to claim 1, characterized in that, The water supply assembly includes a ball valve and a high-pressure flushing pipe. The ball valve is connected to a threaded connector, and the high-pressure flushing pipe is connected to the other end of the ball valve.

8. The cleaning device for a soil chamber pressure sensor according to claim 7, characterized in that, A control component is also connected between the ball valve and the high-pressure water pipe to control the opening and closing of the high-pressure water.

9. The cleaning device for a soil chamber pressure sensor according to claim 8, characterized in that, The control assembly includes a solenoid valve and a controller. The solenoid valve is installed at one end of the ball valve, and the controller is electrically connected to the solenoid valve.

10. The cleaning device for a soil chamber pressure sensor according to claim 3, characterized in that, The threaded connector is made of corrosion-resistant material.

Images