Shield tunneling machine pressure maintaining system

Abstract

The utility model relates to the technical field of internal air pressure control of shield tunneling machines, in particular to a pressure maintaining system of a shield tunneling machine. The system comprises an air source and a main pipeline which is communicated with the air source and a shield tunneling machine soil bin, and an SAMSON pressure maintaining system is arranged at the main pipeline; a three-way valve is arranged at the position of the pipeline communicating the air source with the SAMSON pressure maintaining system, and a four-way valve is arranged at the position of the pipeline communicating the main pipeline with the SAMSON pressure maintaining system. An electromagnetic valve is arranged between the three-way valve and the four-way valve; an air pressure sensor is arranged at the position of the four-way valve and used for transmitting an air pressure signal in the soil bin to the controller, and the controller is used for controlling the electromagnetic valve to be opened and closed. The problem that construction of the shield tunneling machine is affected when the SAMSON system breaks down can be solved, and the effect of preventing the construction of the shield tunneling machine from being affected is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of internal air pressure control of shield machines, in particular to a pressure maintaining system of shield machines. Background Art

[0002] The function of the SAMSON pressure-maintaining system of subway shield equipment is to provide stable pressure in the soil bin. The pressure in the soil bin is directly related to the stability of the heading and is an important factor in the safe construction of the shield. Therefore, the performance of the SAMSON pressure-maintaining system is particularly important.

[0003] The SAMSON pressure-maintaining system is mainly composed of a 3421 pneumatic controller, a 3814 pneumatic transmitter, a 3241 regulating valve and a 3999-0090 air unit. During shield construction, the face, soil bin and SAMSON pressure-maintaining system form a sealed circulation loop, and its performance status can be visually detected. Before construction begins, the excavation bin is open and a sealed chamber cannot be formed. The SAMSON system cannot be started on the shield equipment, resulting in the inability to detect its performance. Therefore, if the SAMSON system is needed during shield advancement, the SAMSON system's fault repair requires repair by a professional manufacturer. Therefore, emergency treatment has a great impact on the construction site. Utility Model Content

[0004] In view of the defects existing in the prior art, the utility model provides a shield machine pressure maintaining system, which can solve the problem of affecting the shield machine construction when the SAMSON system fails, and achieve the effect of preventing the shield machine construction from being affected.

[0005] In order to solve the above technical problems, the utility model is solved by the following technical solutions:

[0006] A shield machine pressure maintaining system comprises an air source and a main pipeline connecting the air source and a soil bin of the shield machine, wherein the main pipeline is provided with a SAMSON pressure maintaining system; a three-way valve is provided on the pipeline connecting the air source and the SAMSON pressure maintaining system, and a four-way valve is provided on the pipeline connecting the main pipeline and the SAMSON pressure maintaining system; an electromagnetic valve is provided between the three-way valve and the four-way valve; an air pressure sensor is provided at the four-way valve, and the air pressure sensor is used to transmit an air pressure signal in the soil bin to a controller, and the controller is used to control the opening and closing of the electromagnetic valve.

[0007] Through the utility model, when the SAMSON pressure maintaining system cannot be used, the air pressure in the soil bin of the shield machine can be detected by the air pressure sensor, and the detected air pressure signal is sent to the controller, and the controller opens the solenoid valve to allow the gas to pass through the solenoid valve and enter the soil bin through the main pipeline to adjust the air pressure in the soil bin; when the SAMSON pressure maintaining system cannot be used, the pressure maintaining system can be used in an emergency to prevent affecting the construction of the shield machine.

[0008] Preferably, the solenoid valve is an electronic ball valve.

[0009] The utility model can be used to operate the electronic ball valve conveniently and open and close quickly. It only needs to rotate 90 degrees from fully open to fully closed, which is convenient for remote control.

[0010] Preferably, a cover plate for blocking the four-way valve is provided at the four-way valve, and a connecting pipe passing through the cover plate and connecting the four-way valve and the air pressure sensor is provided at the cover plate.

[0011] With the utility model, when installing the air pressure sensor, the staff only needs to connect one end of the air pressure sensor to the connecting pipe, and then connect the cover plate at the other end of the connecting pipe to the four-way valve, so that it is convenient for the staff to install the air pressure sensor on the pipeline.

[0012] Preferably, the cover plate includes a sleeve plate threadedly connected to the interface of the four-way valve, and a sleeve is provided at the upper end of the sleeve plate, passing through the sleeve plate and connected to the connecting pipe.

[0013] With the utility model, when installing the cover plate, the staff only needs to screw the sleeve plate onto the four-way valve; when connecting the connecting pipe and the sleeve plate, it is only necessary to insert the sleeve on the sleeve plate into the connecting pipe, and the sleeve and the connecting pipe have an interference fit, thereby preventing air leakage between the sleeve and the connecting pipe; at the same time, it is also convenient for the staff to connect the sleeve and the connecting pipe.

[0014] Preferably, the connecting pipe is a hose.

[0015] Through the utility model, the hose is easy to bend, so it is convenient for workers to place the air pressure sensor at a suitable position.

[0016] Preferably, the four-way valve is arranged close to the soil bin of the shield machine.

[0017] Through the utility model, the air pressure sensor is installed near the four-way valve, so as to be close to the earth bin of the shield machine, so that the air pressure sensor can detect the air pressure value in the earth bin more accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a system block diagram in Example 1.

[0019] Figure 2 Schematic diagram of the four-way valve in Example 1.

[0020] Figure 3 This is a schematic diagram of the cover plate in Example 1. DETAILED DESCRIPTION

[0021] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are only used to explain the utility model but not to limit it.

[0022] Example 1

[0023] like Figure 1-3 As shown, this embodiment provides a shield machine pressure maintaining system, which includes an air source and a main pipeline connecting the air source and the shield machine soil bin, and a SAMSON pressure maintaining system is provided at the main pipeline; a three-way valve is provided at the pipeline connecting the air source and the SAMSON pressure maintaining system, and a four-way valve 100 is provided at the pipeline connecting the main pipeline and the SAMSON pressure maintaining system; a solenoid valve is provided between the three-way valve and the four-way valve 100; an air pressure sensor is provided at the four-way valve 100, and the air pressure sensor is used to transmit the air pressure signal in the soil bin to the controller, and the controller is used to control the opening and closing of the solenoid valve.

[0024] Through this embodiment, when the SAMSON pressure maintaining system cannot be used, the air pressure in the soil bin of the shield machine can be detected by the air pressure sensor, and the detected air pressure signal is sent to the controller. The controller opens the solenoid valve to allow the gas to pass through the solenoid valve and enter the soil bin through the main pipeline to adjust the air pressure in the soil bin; when the SAMSON pressure maintaining system cannot be used, the pressure maintaining system can be used as an emergency measure to prevent affecting the construction of the shield machine.

[0025] In this embodiment, the solenoid valve is an electronic ball valve.

[0026] Through this embodiment, the electronic ball valve is easy to operate and can be opened and closed quickly. It only needs to be rotated 90° from fully open to fully closed, which is convenient for remote control.

[0027] In this embodiment, a cover plate 110 for sealing the four-way valve 100 is provided at the four-way valve 100 , and a connecting pipe 120 is provided at the cover plate 110 to pass through the cover plate 110 and connect the four-way valve 100 and the air pressure sensor.

[0028] Through this embodiment, when the staff installs the air pressure sensor, they only need to connect one end of the air pressure sensor to the connecting pipe 120, and then connect the cover plate 110 at the other end of the connecting pipe 120 to the four-way valve 100, so as to facilitate the staff to install the air pressure sensor on the pipeline.

[0029] In this embodiment, the cover plate 110 includes a sleeve plate 220 threadedly connected to the interface of the four-way valve 100, and a sleeve 210 is provided at the upper end of the sleeve plate 220, passing through the sleeve plate 220 and connected to the connecting pipe 120.

[0030] Through this embodiment, when installing the cover plate 110, the staff only needs to screw the sleeve 220 onto the four-way valve 100; when connecting the connecting pipe 120 and the sleeve 220, it is only necessary to insert the sleeve 210 on the sleeve 220 into the connecting pipe 120, and the sleeve 210 and the connecting pipe 120 have an interference fit, thereby preventing air leakage between the sleeve 210 and the connecting pipe 120; at the same time, it is also convenient for the staff to connect the sleeve 210 and the connecting pipe 120.

[0031] In this embodiment, the connecting pipe 120 is a hose.

[0032] Through this embodiment, the hose is easy to bend, so it is convenient for workers to place the air pressure sensor at a suitable position.

[0033] In this embodiment, the four-way valve 100 is arranged close to the soil bin of the shield machine.

[0034] Through this embodiment, the air pressure sensor is installed near the four-way valve 100, so as to be close to the soil bin of the shield machine, so that the air pressure sensor can detect the air pressure value in the soil bin more accurately.

[0035] In short, the above is only a preferred embodiment of the present utility model, and all equivalent changes and modifications made according to the scope of the patent application of the present utility model should fall within the scope of the present utility model patent.

Claims

1. A shield machine pressure maintenance system, comprising an air source and a main pipeline connecting the air source and a soil bin of the shield machine, wherein a SAMSON pressure maintenance system is provided at the main pipeline, and the characteristics are: A three-way valve is provided at the pipeline connecting the gas source and the SAMSON pressure-maintaining system, and a four-way valve (100) is provided at the pipeline connecting the main pipeline and the SAMSON pressure-maintaining system; a solenoid valve is provided between the three-way valve and the four-way valve (100); and an air pressure sensor is provided at the four-way valve (100), and the air pressure sensor is used to transmit an air pressure signal in the soil bin to a controller, and the controller is used to control the opening and closing of the solenoid valve.

2. A shield machine pressure maintaining system according to claim 1, characterized in that: The solenoid valve is an electronic ball valve.

3. A shield machine pressure maintaining system according to claim 1, characterized in that: A cover plate (110) for sealing the four-way valve (100) is provided at the four-way valve (100), and a connecting pipe (120) is provided at the cover plate (110) that passes through the cover plate (110) and connects the four-way valve (100) and the air pressure sensor.

4. A shield machine pressure maintaining system according to claim 3, characterized in that: The cover plate (110) comprises a sleeve plate (220) threadedly connected to the interface of the four-way valve (100), and a sleeve (210) passing through the sleeve plate (220) and connected to the connecting pipe (120) is provided at the upper end of the sleeve plate (220).

5. A shield machine pressure maintaining system according to claim 2, characterized in that: The connecting pipe (120) is a hose.

6. A shield machine pressure maintaining system according to claim 5, characterized in that: The four-way valve (100) is arranged close to the earth bin of the shield machine.

Images