Point switch foundation pit water level monitoring and automatic drainage system and point switch

Abstract

The invention discloses a point switch foundation pit water level monitoring and automatic drainage system and a point switch, and the system comprises a water level acquisition module which is used for acquiring water level distance information of a foundation pit and a water level image of the foundation pit, and transmitting the information and the image to a water level processing module; the water level processing module is used for obtaining the real-time water level height of the foundation pit through processing and then sending the real-time water level height of the foundation pit and the foundation pit water level image to the monitoring host; the monitoring host is used for comparing the real-time water level height of the foundation pit with a preset foundation pit water level drainage starting height threshold value Y1, when the real-time water level height of the foundation pit is larger than Y1, alarm information is sent, and a water pump starting work signal is sent to the water pump; and the water pump is used for starting in real time to discharge water in the foundation pit to the outside of the foundation pit according to the water pump starting working signal. The water level in the foundation pit can be safely and reliably monitored, drainage treatment is conducted in time, normal operation of the point switch is guaranteed, and safe operation of a train is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of rail transit, in particular to a switch machine foundation pit water level monitoring and automatic drainage system, and a switch machine. Background Art

[0002] A switch machine is an important signal infrastructure equipment used to reliably switch the position of switches, change the direction of switch opening, lock the switch point rail, and reflect the position of switches. It can well ensure driving safety, improve transportation efficiency, and improve the labor intensity of drivers.

[0003] The function of the switch machine is to switch and lock the point rail (heart rail), change the opening direction of the turnout, and reflect the position status of the point rail (heart rail) through the contact. The switch machine is one of the important equipment to ensure the safety of railway transportation. If the switch machine fails to switch the turnout into place normally, it will affect the normal operation of the train. In serious cases, it may cause a train collision or derailment. Therefore, the switch machine is an electric traction equipment for railway turnouts, and its working reliability is related to the safety of railway transportation.

[0004] The switch machine is usually installed in a reserved pit next to the turnout. To ensure the normal switch, the pit needs to be lower than the roadbed. In the tunnel, water can easily accumulate in the pit due to tunnel flushing, structural seepage and other reasons. In the absence of special requirements on site, the protection level of the switch machine is usually IP54. According to GB / T4208-2017 "IP Code for Housing Protection Level", equipment with a protection level of IP54 can only be splash-proof. If the water level in the pit cannot be monitored in real time, the accumulated water in the pit may overflow or even submerge the switch machine. If water enters the switch machine, its internal structure will rust, affecting the turnout indication and even the normal operation of the train.

[0005] However, there is currently no technology that can safely and reliably monitor the water level in the foundation pit and conduct drainage in a timely manner, thereby ensuring the normal operation of the switch machine, extending the service life of the switch machine, and ensuring the safe operation of the train. Summary of the invention

[0006] The purpose of the present invention is to provide a switch machine foundation pit water level monitoring and automatic drainage system, and a switch machine in view of the technical defects in the prior art.

[0007] To this end, the present invention provides a switch machine foundation pit water level monitoring and automatic drainage system, which is characterized by comprising a water level acquisition module, a water level processing module, a water pump and a monitoring host;

[0008] The water level acquisition module is used to collect the water level distance information of the foundation pit below the switch machine, as well as to collect the foundation pit water level image, and send it to the water level processing module;

[0009] The water level processing module is connected to the water level acquisition module, and is used to receive and store the water level distance information and the water level image of the foundation pit, obtain the real-time water level height of the foundation pit after processing, and then send the real-time water level height of the foundation pit and the water level image of the foundation pit to the monitoring host;

[0010] The monitoring host is connected to the water level processing module, and is used to receive and store the real-time water level height of the foundation pit and the water level image of the foundation pit, and compare the real-time water level height of the foundation pit with the preset water level drainage height threshold Y of the foundation pit. When the real-time water level height of the foundation pit is greater than the water level drainage height threshold of the foundation pit, an alarm message is issued, and a water pump start-up signal is issued, and the water pump start-up signal is forwarded to the water pump through the water level processing module;

[0011] The water pump, whose control end is connected to the water level processing module, is used to start the drainage operation in real time according to the water pump start working signal sent by the water level processing module, and then pump the water in the foundation pit and discharge it to the outside of the foundation pit.

[0012] In addition, the present invention also provides a switch machine, which particularly includes the switch machine foundation pit water level monitoring and automatic drainage system as described above.

[0013] It can be seen from the technical solution provided by the present invention that, compared with the prior art, the present invention provides a switch machine foundation pit water level monitoring and automatic drainage system, a switch machine, which is scientifically designed and can safely and reliably monitor the water level in the foundation pit and perform drainage in time, thereby ensuring the normal operation of the switch machine, extending the service life of the switch machine, and ensuring the safe operation of the train, which has great practical significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A structural block diagram of a switch machine foundation pit water level monitoring and automatic drainage system provided by the present invention;

[0015] Figure 2 A schematic diagram of the installation position of a water level acquisition module in an embodiment of a switch machine foundation pit water level monitoring and automatic drainage system provided by the present invention;

[0016] Figure 3 A schematic diagram of electrical connections between a data processing unit and a relay control unit, a water pump and a switch machine cable terminal box in a switch machine foundation pit water level monitoring and automatic drainage system provided by the present invention;

[0017] Figure 4 A switch machine foundation pit water level monitoring and automatic drainage system provided by the present invention, and a work flow chart of an embodiment. DETAILED DESCRIPTION

[0018] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0020] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0022] See also Figures 1 to 4 The present invention provides a switch machine foundation pit water level monitoring and automatic drainage system, including a water level acquisition module 100, a water level processing module 200, a water pump 300 and a monitoring host 400;

[0023] The water level acquisition module 100 is used to acquire water level distance information of the foundation pit below the switch machine 1, and acquire a foundation pit water level image (specifically, an image of the target 6 and the foundation pit around the target 6), and send it to the water level processing module 200;

[0024] The water level processing module 200 is connected to the water level acquisition module 100 (communicating with each other), and is used to receive and store the water level distance information and the water level image of the foundation pit, obtain the real-time water level height of the foundation pit after processing, and then send the real-time water level height of the foundation pit and the water level image of the foundation pit to the monitoring host;

[0025] The monitoring host 400 is connected to the water level processing module 200 (communicatively connected), and is used to receive and store the real-time water level height of the foundation pit and the water level image of the foundation pit, and compare the real-time water level height of the foundation pit with the preset water level drainage height threshold value (i.e., alarm threshold value) Y1 of the foundation pit. When the real-time water level height of the foundation pit is greater than the water level drainage height threshold value (i.e., alarm threshold value) of the foundation pit, an alarm message (e.g., sound and light alarm) is issued, and a water pump start-up work signal (command) is issued, and the water pump start-up work signal is forwarded to the water pump 300 through the water level processing module 200;

[0026] The water pump 300, whose control end is connected to the water level processing module 200 (communicatingly connected), is used to start the drainage operation in real time according to the water pump start working signal sent by the water level processing module 200, and extract the water in the foundation pit and discharge it to the outside of the foundation pit.

[0027] In the present invention, in a specific implementation, the monitoring host is also used to compare the real-time water level of the foundation pit with the preset foundation pit water level stop drainage height threshold (i.e., safety threshold) Y2 in real time after sending a trigger start signal. When the real-time water level of the foundation pit is less than the foundation pit water level stop drainage height threshold Y2, a water pump stop working signal (command) is generated and forwarded to the water pump 300 through the water level processing module 200;

[0028] The water pump 300 is also used to stop the drainage operation after receiving a water pump stop signal (command).

[0029] In a specific implementation, the foundation pit water level drainage stopping height threshold (i.e., safety threshold) Y2 is less than the foundation pit water level drainage starting height threshold (i.e., alarm threshold) Y1.

[0030] In the present invention, in a specific implementation, the water inlet of the water pump 300 is located at the bottom of the foundation pit 3 below the switch machine 1 (specifically below the fixing device 2 matched with the switch machine 1);

[0031] The water outlet of the water pump 300 is located in the drainage ditch beside the foundation pit 3;

[0032] The water pump 300 is used to pump water from the foundation pit and discharge it into the drainage ditch outside the foundation pit 3 after the drainage operation is started.

[0033] In the present invention, in specific implementation, the water level acquisition module 100 includes a laser sensor 4, an image sensor 5 and a target 6;

[0034] The laser sensor and the image sensor are arranged above the foundation pit 3 below the fixing device 2 matched with the switch machine 1;

[0035] The target 6 is placed inside the foundation pit 3;

[0036] The target 6 can float on the surface of the accumulated water in the foundation pit 3;

[0037] The laser detection head (i.e., laser head) of the laser sensor 4 is located directly above the target;

[0038] The laser sensor 4 is used to measure the real-time distance between it and the target in real time, and then send the real-time distance value as the water level distance information of the foundation pit to the water level processing module 200;

[0039] The water level processing module 200 is used to obtain the real-time water level height of the foundation pit through processing, specifically: it is used to pre-record the distance value between the laser sensor and the target placed on the bottom of the foundation pit when there is no water accumulation in the foundation pit (that is, the target position when there is no water accumulation in the foundation pit), and define the distance value as the initial distance, and then obtain the real-time water level height of the foundation pit based on the difference between the initial distance and the real-time distance sent by the laser sensor (that is, the water level distance information of the foundation pit).

[0040] It should be noted that the real-time water level of the foundation pit is equal to the difference between the initial distance and the real-time distance.

[0041] In a specific implementation, the shape of the target can be a horizontally distributed long strip or a flat plate.

[0042] It should be noted that the laser sensor emits laser to the target, the target reflects the laser to the laser sensor, and the laser sensor records the time interval from emitting the laser to receiving the reflected laser. The laser sensor obtains the real-time distance between it and the target (i.e., the water level distance information of the foundation pit) based on the laser propagation time.

[0043] In the present invention, in a specific implementation, the water level processing module 200 uploads the real-time water level height and the water level image of the foundation pit to an external communication extension or monitoring host through a power carrier.

[0044] It should be noted that the laser sensor communicates via RS485, and sends the collected foundation pit water level distance information (i.e. the real-time distance between the laser sensor and the target) to the water level processing module 200. After being processed and forwarded by the water level processing module 200, the real-time water level height of the foundation pit is uploaded to the monitoring host.

[0045] It should be noted that, for the present invention, an industrial digital camera is selected through an image sensor to capture the foundation pit image at the floating target. The image sensor communicates through a USB interface and sends the collected image information to the water level processing module 200. After being processed and forwarded by the water level processing module 200, the foundation pit water level image is uploaded to the monitoring host.

[0046] In terms of specific implementation, it should be noted that the laser sensor 4 and the image sensor 5 can be connected to the fixing device 2 matching the switch machine 1 through a mounting bracket 7 (for example, an inverted L-shaped bracket); for example, the L-shaped mounting bracket 7 includes a horizontal portion and a vertical portion, one end of the horizontal portion is fixedly connected to the top of the vertical portion, and the laser sensor and the image sensor are arranged on the horizontal portion; the bottom of the vertical portion is fixedly connected to the top of the fixing device 2 matching the switch machine 1.

[0047] It should be noted that the water level collection module is installed on the fixing device 2 of the switch machine 1, and collects the water level height of the foundation pit below the fixing device 2 of the switch machine 1 vertically downward.

[0048] In terms of specific implementation, the laser sensor uses an industrial-grade reflective laser liquid level sensor with RS485 serial port output; for example, the laser sensor uses the L2S-40 laser ranging sensor produced by Shenzhen Motian Radio Frequency Technology Co., Ltd., which is used to measure the water level height of the foundation pit (specifically, the real-time distance between the laser sensor and the target).

[0049] In terms of specific implementation, the image sensor uses a digital industrial camera with USB interface output;

[0050] In terms of specific implementation, the target is made of light-weight, reflective material. It can be suspended on the water surface. It can float up as the water level in the foundation pit rises, and fall down as the water level in the foundation pit drops.

[0051] In specific implementation, the target is connected to a vertically distributed linear guide rail 8;

[0052] The bottom end of the linear guide rail 8 contacts the bottom of the foundation pit 3;

[0053] It should be noted that the target is fixed by the linear guide rail 8, which restricts the target to float freely up and down vertically.

[0054] It should be noted that see Figure 2 As shown, the overall shape of the linear guide rail 8 can be a rectangular parallelepiped. The top mounting base of the linear guide rail 8 is fixedly connected to the L-shaped mounting bracket 7, the linear guide rail 8 is led out from the horizontal part of the mounting bracket 7, vertically passes through the central through hole of the target, and the bottom end of the linear guide rail 8 contacts the bottom of the foundation pit 3.

[0055] Furthermore, the vertically distributed linear guide rail 8 has a plurality of water level scale lines which are distributed at equal intervals from top to bottom, and there is a preset scale width (for example, 1 cm) between any two adjacent water level scale lines;

[0056] In a specific implementation, the shape of the target is a horizontally distributed rectangle, and the edge of the target is clear.

[0057] Furthermore, the position of the scale line with a value of 0 (ie, a height of 0) on the linear guide rail 8 contacts the bottom of the foundation pit 3. The values ​​of the scale lines on the linear guide rail 8 increase from bottom to top (increase by 1 cm each time).

[0058] It should be noted that the linear guide rail 8 is also a kind of ruler. The linear guide rail 8 has multiple water level scale lines distributed at equal intervals from top to bottom, and there is a preset scale width (for example, 1 cm) between any two adjacent water level scale lines, thereby assisting the image sensor to collect the water level height of the foundation pit.

[0059] It should be noted that the scale lines are distributed on the guide rail. The image sensor, linear guide rail, and target are used together. The maintenance personnel use the foundation pit water level image collected by the image sensor to identify which water level scale line the current target is aligned with, and obtain the water level height of the foundation pit. Therefore, this method can also be used as a backup measurement method for the water level height of the foundation pit when the laser sensor fails.

[0060] In the present invention, in specific implementation, the water level processing module 200 includes a data processing unit U1, a power carrier communication unit U2 and a relay control unit U3;

[0061] The data processing unit U1 is connected to the power carrier communication unit U2 (communicatively connected) and is used to send the real-time water level height of the foundation pit and the water level image of the foundation pit to the power carrier communication unit;

[0062] The power carrier communication unit U2 is connected to the monitoring host 400 (communicatively connected) and is used to forward the real-time water level height and the water level image of the foundation pit to the monitoring host 400 .

[0063] The data processing unit U1 is connected to the power supply terminal of the water pump 300 through the relay control unit U3;

[0064] In specific implementation, the relay control unit U3 includes a solid-state relay;

[0065] The signal output terminal (e.g., GPIO general purpose input and output pin) of the data processing unit U1 is connected to the control terminal of the solid-state relay;

[0066] The signal output terminal of the data processing unit U1 (such as a GPIO general purpose input and output pin) is used to send a control signal to control the solid-state relay to turn on;

[0067] Furthermore, the solid-state relay is a DC-controlled AC solid-state relay.

[0068] See also Figure 3 As shown, the signal output terminal (GPIO port) of the data processing unit U1 is connected to the control 1 port of the solid-state relay;

[0069] The control 2 port of the solid-state relay is connected to GND (i.e. grounded);

[0070] The load input port of the solid-state relay is connected to the AC220V neutral terminal in the switch machine cable terminal box;

[0071] The load output port of the solid-state relay is connected to the AC220V neutral terminal on the water pump;

[0072] The AC 220V live wire terminal on the water pump is connected to the AC220V live wire terminal in the switch machine cable terminal box.

[0073] It should be noted that, for the present invention, when the monitoring host recognizes that the foundation pit water level exceeds the threshold (the foundation pit water level drainage height threshold Y1), the monitoring host controls the U1 data processing unit GPIO port to output a high level, the solid-state relay is turned on, the water pump neutral line is turned on, a loop is formed, and the water pump starts working.

[0074] When the monitoring host recognizes that the foundation pit water level is lower than the threshold (the foundation pit water level drainage stop height threshold Y2), the monitoring host controls the U1 data processing unit GPIO port to output a low level, the solid-state relay is cut off, the water pump cannot form a circuit, and the water pump stops working.

[0075] It should be noted that the water level processing module 200 of the present invention can send the collected switch machine foundation pit water level information directly to the indoor monitoring terminal (ie, the monitoring host) through power carrier communication with a communication distance of not less than 500 meters.

[0076] It should be noted that the power carrier communication unit couples the received foundation pit water level information (including the real-time water level height of the foundation pit and the foundation pit water level image), and the power carrier communication unit leads out the power line to the 220V AC power terminal in the switch machine cable terminal box, so that the foundation pit water level information is sent to the monitoring host or communication extension through the switch machine cable terminal box.

[0077] It should be noted that the water level processing module 200 of the present invention can be used in conjunction with an ADSL-PLC communication extension, with a communication distance of no less than 3500 meters, which can meet the monitoring requirements of various types of stations.

[0078] In specific implementation, the water level processing module 200 can be installed in an HZ-24 cable terminal box and fixed next to the cable terminal box of the switch machine.

[0079] In the present invention, in a specific implementation, the monitoring host includes an industrial computer and a display;

[0080] The industrial computer can use the 610L industrial computer produced by Advantech, the monitor can use the VA951S monitor produced by ViewSonic, and the communication extension can use the JQ1·FT communication extension produced by Tianjin Railway Signal Co., Ltd.

[0081] In the present invention, in a specific implementation, the water pump is an industrial-grade water pump powered by AC 220V and is fixed beside the switch machine foundation pit.

[0082] In the present invention, in a specific implementation, the monitoring host 400 is used to control the water level acquisition module 100 to perform the acquisition operation of the water level distance information of the foundation pit according to the preset control rules, and control the working state of the water pump 300;

[0083] See also Figure 4 As shown, the preset control rules specifically include the following operations:

[0084] Step S1, the monitoring host 400 sends a control signal to the water level acquisition module 100 through the water level processing module 200, controls the water level acquisition module 100 to regularly collect water level distance information of the foundation pit according to a preset period T1 (for example, collecting data once per second, that is, a frequency of 1 Hz), and controls the water level processing module 200 to upload the real-time water level height of the foundation pit obtained by processing the water level distance information to the monitoring host;

[0085] Step S2, the monitoring host determines whether the real-time water level of each foundation pit exceeds (i.e. is greater than) a preset foundation pit water level drainage height threshold (i.e., alarm threshold) Y1. If it exceeds Y1, step S3 is executed; otherwise, no processing is performed and step S1 is returned to execution;

[0086] Step S3, when the real-time water level of the foundation pit exceeds (i.e. is greater than) the preset foundation pit water level drainage height threshold Y1, the monitoring host 400 generates a water level alarm signal, uploads the water level alarm signal to the external signal centralized monitoring system, and at the same time, sends a triggering water pump start-up work signal (command) to the water level processing module 200 to control the water pump 300 to start drainage, and controls the water level acquisition module 100 to collect the water level distance information of the foundation pit according to the preset period T2 (for example, collecting data 10 times per second, i.e., a frequency of 10 Hz) through the water level processing module 200, and then executes step S4;

[0087] In a specific implementation, the preset period T2 is smaller than the preset period T1.

[0088] In step S3, in specific implementation, the monitoring host 400 sends a water pump working command to the water level processing module 200 (specifically, communication can be carried out through power carrier communication). After the water level processing module receives the water pump start-up working signal, the data processing unit in the water level processing module 200 controls the GPIO (general purpose input and output) pin to generate a high-level signal to turn on the connected solid-state relay. After the solid-state relay is turned on, the water pump is powered and starts to drain water.

[0089] Step S4: The monitoring host 400 receives the real-time water level of the foundation pit uploaded by the water level processing module 200 according to the preset period T2, and determines whether the real-time water level of the foundation pit is less than the foundation pit water level drainage stop height threshold Y2. If it is less than Y2, execute step S5. Otherwise, no processing is performed and return to execute S3.

[0090] Step S5: When the real-time water level of the foundation pit is less than the foundation pit water level drainage stop height threshold Y2, the monitoring host 400 generates a water level alarm recovery message, uploads the water level alarm recovery message to the external signal centralized monitoring system, and at the same time, sends a water pump stop signal to the water level processing module 200 to control the water pump 300 to stop drainage, and controls the water level acquisition module 100 through the water level processing module 200 to collect the water level distance information of the foundation pit according to the preset period T1.

[0091] In step S5, in specific implementation, the monitoring host 400 sends a water pump stop signal (command) to the water level processing module 200, and communicates through the power carrier communication mode. After the water level processing module 200 receives the water pump stop signal (command), the data processing unit in the water level processing module 200 controls the GPIO pin to generate a low-level signal to disconnect the connected solid-state relay. After the solid-state relay is disconnected, the water pump loses power and stops draining.

[0092] Based on the above-mentioned switch machine foundation pit water level monitoring and automatic drainage system provided by the present invention, the present invention also provides a switch machine, which includes the switch machine foundation pit water level monitoring and automatic drainage system as described above.

[0093] Compared with the prior art, the switch machine foundation pit water level monitoring and automatic drainage system and switch machine provided by the present invention have the following beneficial technical effects:

[0094] 1. The present invention can automatically drain water after the foundation pit water level exceeds a preset threshold, which significantly improves work efficiency and ensures the reliable operation of the switch machine.

[0095] 2. The present invention can collect foundation pit water level images in real time, and can enable staff to remotely view the actual water level conditions through the monitoring host and the further connected external signal centralized monitoring system, so as to avoid the interference of some unexpected situations on the normal performance of the monitoring function of the present invention, so that staff can promptly discover and eliminate the interference of unexpected situations, and ensure the maintenance efficiency of the system of the present invention. For example, if a branch falls into the foundation pit, the normal floating of the target is affected due to the obstruction of the branch, resulting in the actual water surface height exceeding the top surface height of the target, resulting in the detection data of the laser sensor to reduce the accuracy.

[0096] It can be seen from the technical solution provided by the present invention above that, compared with the prior art, the present invention provides a switch pit water level monitoring and automatic drainage system, which is scientifically designed and can enable operating personnel to safely and reliably monitor the switch pit water level, and can automatically drain the water after the pit water level exceeds a preset threshold, and can upload the water level information to an external signal centralized monitoring system according to customer needs to ensure the quality of monitoring, which is conducive to timely detection of pit water level abnormalities and ensure the safety of train driving.

[0097] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A switch machine foundation pit water level monitoring and automatic drainage system, characterized in that: It comprises a water level acquisition module (100), a water level processing module (200), a water pump (300) and a monitoring host (400); A water level acquisition module (100) is used to acquire water level distance information of a foundation pit (3) located below the switch machine (1), as well as to acquire a foundation pit water level image, and send the image to a water level processing module (200); The water level processing module (200) is connected to the water level acquisition module (100) and is used to receive and store the water level distance information and the water level image of the foundation pit, obtain the real-time water level height of the foundation pit through processing, and then send the real-time water level height of the foundation pit and the water level image of the foundation pit to the monitoring host (400); A monitoring host (400) is connected to the water level processing module (200) and is used to receive and store the real-time water level height of the foundation pit and the foundation pit water level image, and compare the real-time water level height of the foundation pit with a preset foundation pit water level drainage height threshold Y1. When the real-time water level height of the foundation pit is greater than the foundation pit water level drainage height threshold, an alarm message is issued and a water pump start-up signal is issued. The water pump start-up signal is forwarded to the water pump (300) via the water level processing module (200); The water pump (300) has a control end connected to the water level processing module (200) and is used to start the drainage operation in real time according to the water pump start-up work signal sent by the water level processing module (200), and then pump the water in the foundation pit and discharge it to the outside of the foundation pit.

2. The switch machine foundation pit water level monitoring and automatic drainage system according to claim 1, characterized in that: The monitoring host (400) is further used to compare the real-time water level of the foundation pit with a preset foundation pit water level drainage stop height threshold Y2 in real time after sending a trigger start signal, and when the real-time water level of the foundation pit is less than the foundation pit water level drainage stop height threshold Y2, generate a water pump stop signal, and forward it to the water pump (300) through the water level processing module (200); The water pump (300) is further used to stop the drainage operation after receiving a water pump stop signal; The foundation pit water level drainage stop height threshold Y2 is less than the foundation pit water level drainage start height threshold Y1.

3. The switch machine foundation pit water level monitoring and automatic drainage system according to claim 1, characterized in that: The water inlet of the water pump (300) is located at the bottom of the foundation pit (3) below the fixing device (2) matched with the switch machine (1); The water outlet of the water pump (300) is located in the drainage ditch beside the foundation pit (3); The water pump (300) is used to extract water from the foundation pit and discharge it into a drainage ditch outside the foundation pit (3) after the drainage operation is started.

4. The switch machine foundation pit water level monitoring and automatic drainage system according to claim 1, characterized in that: A water level acquisition module (100) comprising a laser sensor (4), an image sensor (5) and a target (6); The laser sensor and the image sensor are arranged above the foundation pit (3) below the fixing device (2) matched with the switch machine (1); The target (6) is placed inside the foundation pit (3); The target (6) can float on the surface of the accumulated water in the foundation pit (3); The laser detection head of the laser sensor (4) is located directly above the target; The laser sensor (4) is used to measure the real-time distance between it and the target in real time, and then send the real-time distance value as the water level distance information of the foundation pit to the water level processing module (200).

5. The switch machine foundation pit water level monitoring and automatic drainage system according to claim 1, characterized in that: The target is connected to a vertically distributed linear guide rail (8); The bottom end of the linear guide rail (8) contacts the bottom of the foundation pit (3); The linear guide rail (8) is provided with a plurality of water level scale lines which are distributed in sequence and at equal intervals from top to bottom; and / or, The laser sensor (4) and the image sensor (5) are connected to a fixing device (2) matched with the switch machine (1) through an L-shaped mounting bracket (7); and / or, The water level processing module (200) uploads the real-time water level height and the water level image of the foundation pit to an external communication extension or monitoring host through a power carrier.

6. The switch machine foundation pit water level monitoring and automatic drainage system according to claim 1, characterized in that: The water level processing module (200) is used to obtain the real-time water level of the foundation pit through processing, specifically: It is used to pre-record the distance value between the laser sensor and the target placed on the bottom of the foundation pit when there is no water accumulation in the foundation pit, and define the distance value as the initial distance. Then, the real-time water level of the foundation pit is obtained based on the difference between the initial distance and the real-time distance sent by the laser sensor.

7. The switch machine foundation pit water level monitoring and automatic drainage system according to claim 1, characterized in that: A water level processing module (200), comprising a data processing unit U1, a power carrier communication unit U2 and a relay control unit U3; The data processing unit U1 is connected to the power carrier communication unit U2 and is used to send the real-time water level height and the water level image of the foundation pit to the power carrier communication unit; The power carrier communication unit U2 is connected to the monitoring host (400) and is used to forward the real-time water level height of the foundation pit and the foundation pit water level image to the monitoring host (400); The data processing unit U1 is connected to the power supply end of the water pump (300) through the relay control unit U3.

8. The switch machine foundation pit water level monitoring and automatic drainage system according to claim 7, characterized in that: Relay control unit U3, including a solid-state relay; The signal output terminal of the data processing unit U1 is connected to the control 1 port of the solid-state relay; The control 2 port of the solid-state relay is connected to GND; The load input port of the solid-state relay is connected to the AC220V neutral terminal in the switch machine cable terminal box; The load output port of the solid-state relay is connected to the AC220V neutral terminal on the water pump; The AC 220V live wire terminal on the water pump is connected to the AC220V live wire terminal in the switch machine cable terminal box.

9. The switch machine foundation pit water level monitoring and automatic drainage system according to claim 7, characterized in that: A monitoring host (400) is used to control the water level acquisition module (100) to perform an operation of collecting water level distance information of the foundation pit and to control the working state of the water pump (300) according to a preset control rule; The preset control rules include the following operations: Step S1, the monitoring host (400) sends a control signal to the water level acquisition module (100) through the water level processing module (200), controls the water level acquisition module (100) to regularly collect water level distance information of the foundation pit according to a preset period T1, and controls the water level processing module (200) to upload the real-time water level height of the foundation pit obtained by processing the water level distance information to the monitoring host; Step S2, the monitoring host determines whether the real-time water level of the foundation pit exceeds the preset foundation pit water level drainage height threshold Y1 each time, if it exceeds Y1, execute step S3, otherwise, no processing is performed; Step S3, when the real-time water level of the foundation pit exceeds a preset foundation pit water level drainage height threshold Y1, the monitoring host (400) generates a water level alarm signal, uploads the water level alarm signal to an external signal centralized monitoring system, and at the same time, sends a triggering water pump start-up signal to the water level processing module (200), controls the water pump (300) to start drainage, and controls the water level collection module (100) to collect water level distance information of the foundation pit according to a preset period T2 through the water level processing module (200), and then executes step S4; The preset period T2 is smaller than the preset period T1; Step S4: the monitoring host (400) receives and processes the real-time water level of the foundation pit uploaded by the water level processing module (200) according to the preset period T2, and determines whether the real-time water level of the foundation pit is less than the foundation pit water level drainage stop height threshold Y2. If it is less than Y2, step S5 is executed; otherwise, no processing is performed; Step S5: When the real-time water level of the foundation pit is less than the foundation pit water level drainage stop height threshold Y2, the monitoring host (400) generates a water level alarm recovery message, uploads the water level alarm recovery message to an external signal centralized monitoring system, and at the same time, sends a water pump stop signal to the water level processing module (200) to control the water pump (300) to stop drainage, and controls the water level acquisition module (100) through the water level processing module (200) to collect the water level distance information of the foundation pit according to the preset period T1.

10. A switch machine, characterized in that: It comprises the switch machine foundation pit water level monitoring and automatic drainage system as described in any one of claims 1 to 9.

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