Turnout gap monitoring device

Abstract

The utility model provides a turnout gap monitoring device. The turnout gap monitoring device comprises a transmission assembly, an angle detection piece and a controller. The transmission assembly comprises a rotating wheel and a transmission mechanism, the transmission mechanism is connected with an indication rod in the switch machine, the rotating wheel is connected with the transmission mechanism, and the transmission mechanism drives the rotating wheel to rotate along with the movement of the indication rod; the angle detection piece is arranged on the rotating wheel and is coaxially connected with the rotating wheel so as to detect the rotating angle of the rotating wheel; and the controller is connected with the angle detection piece and is used for judging whether the turnout gap is in a normal range or not according to the rotation angle. According to the utility model, video data acquisition and transmission are not needed, so that the probability of display lagging and crash conditions is reduced; sensors such as a camera do not need to be installed in the switch machine, the installation process is simplified, and the cost is low compared with a video sensor.

Description

TECHNICAL FIELD

[0001] The utility model relates to railway instrument technical field especially relates to a turnout gap monitoring devices. BACKGROUND

[0002] The turnout is a kind of line connecting equipment for making locomotive and vehicle turn into another track, and the turnout has the characteristics of large quantity, complex structure, short service life, limiting train speed, low traffic safety and large maintenance and repair investment, and is one of the three weak links of track together with curve and joint.The turnout gap fault is an important factor affecting normal railway transportation, and the gap change leads to a large proportion of turnout failure rate.The gap detection devices in the industry are uneven, and the commonly used video gap detection device is currently used.

[0003] The Chinese patent with publication number CN202508119U discloses a turnout gap monitoring system, which obtains the video data of the camera for monitoring the turnout gap in real time, and the data is transmitted to the control terminal in the machine room through the controller area network (CAN) interface after processing. However, since it is video data transmission, data congestion may occur, causing display lag or crash. In addition, the camera and other sensors need to be installed in the switch machine, which is complicated to install. Moreover, the cost of video gap monitoring is high.

[0004] Therefore, it is necessary to provide a new type of turnout gap monitoring device to solve the above problems in the prior art. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of turnout gap monitoring devices, the linear motion of indicating rod in switch machine is changed into the rotary motion of rotary wheel, and then the displacement of indicating rod in switch machine is obtained, to judge whether turnout gap is in normal range, without video data acquisition and transmission, reduce the probability of display lag and crash condition. Moreover, camera and other sensors do not need to be installed in switch machine, which simplifies the installation process and reduces the cost compared with video sensor.

[0006] To achieve the above object, the turnout gap monitoring device of the utility model includes transmission assembly, angle detection piece and controller. The transmission assembly includes rotary wheel and transmission mechanism. The transmission mechanism is connected with indicating rod in switch machine. The rotary wheel is connected with the transmission mechanism. The transmission mechanism drives the rotary wheel to rotate with the movement of indicating rod. The angle detection piece is arranged on the rotary wheel and coaxially connected with the rotary wheel to detect the rotation angle of the rotary wheel. The controller is connected with the angle detection piece. The controller is used to judge whether turnout gap is in normal range according to the rotation angle.

[0007] The beneficial effect of the turnout gap monitoring device is that: the transmission assembly includes a rotating wheel and a transmission mechanism, the transmission mechanism is connected with an indicating rod in a switch machine, the rotating wheel is connected with the transmission mechanism, the transmission mechanism drives the rotating wheel to rotate with the movement of the indicating rod, so that the linear motion of the indicating rod in the switch machine can be changed into the rotary motion of the rotating wheel, that is, the linear displacement of the indicating rod is converted into the angular displacement of the rotating wheel; the angle detection piece is arranged on the rotating wheel and coaxially connected with the rotating wheel to detect the rotation angle of the rotating wheel, that is, the angular displacement of the rotating wheel can be measured through the angle detection piece; the controller is connected with the angle detection piece, and the controller is used for judging whether the turnout gap is in a normal range according to the rotation angle, that is, the angular displacement of the rotating wheel collected by the angle detection piece is read and output through the controller, and then the displacement of the indicating rod in the switch machine is obtained, so that whether the turnout gap is in the normal range can be judged, video data collection and transmission are not required, and the probability of display lag and dead machine condition is reduced; the gap displacement monitoring is performed by the angle detection piece, the cost is reduced compared with the video sensor; and the utility model does not need to install a camera and other sensors in the switch machine, simplifies the installation process, realizes simple, convenient and efficient turnout gap monitoring, has strong applicability, is widely applied, has good application prospect.

[0008] Preferably, the transmission mechanism includes a synchronous belt, a synchronous pulley, a sliding block and a guide rail, the sliding block is slidingly arranged on the guide rail, two ends of the synchronous belt are respectively sleeved with the rotating wheel and the synchronous pulley, the sliding block is fixedly connected with the indicating rod, and the sliding block is fixedly arranged with the synchronous belt, so that the synchronous belt rotates annularly with the movement of the indicating rod to drive the rotating wheel to rotate. Its beneficial effect is that: the synchronous belt transmission has the characteristics of accurate transmission ratio, no slip, constant speed ratio, stable transmission, and is not easy to be affected by sand and stone like gear, so that the measurement accuracy can be improved; at the same time, the transmission mechanism has the advantages of oil resistance, good wear resistance and good anti-aging performance, and is suitable for outdoor environment; and the guide rail and sliding block transmission can minimize the resistance of the monitoring device to the indicating rod, basically does not affect the turnout locking, and reduces the influence on the turnout rotation process.

[0009] Preferably, the turnout gap monitoring device further comprises a device housing, the device housing is provided with a first bolt hole, the switch machine is provided with a second bolt hole, and the monitoring device is connected and fixed with the switch machine by bolts passing through the first bolt hole and the second bolt hole; the device housing is provided with a receiving cavity and is provided with a mounting portion at a first side end thereof facing the switch machine, the transmission assembly and the angle detection piece are arranged in the receiving cavity, and the controller is fixedly arranged on the mounting portion. Its beneficial effects are that the monitoring device is installed on the outside of the switch machine by bolts, without changing any original components of the switch machine, the monitoring device is convenient to install and replace, has high applicability, and is suitable for most turnouts in the prior art, whether the indicating rod linkage in the switch machine or the separate drive is also suitable.

[0010] Preferably, the monitoring device further comprises an adjusting piece, a threaded hole is arranged at a second side end of the device housing away from the switch machine, the adjusting piece penetrates through the threaded hole and is connected with the synchronous pulley, and the adjusting piece is driven to rotate forward or reversely to drive the synchronous pulley to move towards or away from the rotating wheel, so as to adjust the tightness of the synchronous belt. Its beneficial effects are that the measurement accuracy is improved, and the influence on the turnout rotation process is reduced.

[0011] Preferably, the first side end is provided with a first penetrating portion, the indicating rod penetrates through the first penetrating portion and is arranged in a gap with the outer bottom of the receiving cavity; the bottom of the receiving cavity is provided with a second penetrating portion, and the second penetrating portion is arranged in parallel with the guide rail; the monitoring device further comprises a connecting rod, one end of the connecting rod is fixedly connected with the sliding block, and the other end of the connecting rod penetrates through the second penetrating portion and is fixedly connected with the indicating rod. Its beneficial effects are that the design is ingenious, the integration degree is high, the overall volume of the monitoring device is reduced, the original components of the switch machine are not affected, the sliding block and the indicating rod are connected through the connecting rod, the resistance of the monitoring device to the indicating rod is minimized, and the measurement accuracy is improved.

[0012] Preferably, the transmission assembly and the angle detection piece are both provided with two groups, the guide rails in the two groups of transmission assemblies are arranged in parallel, and the sliding blocks in the two groups of transmission assemblies are respectively connected with two groups of indicating rods in the switch machine.

[0013] Preferably, the monitoring device further includes a zero-point calibration button and a display, both connected to the controller. The zero-point calibration button drives the controller to record the zero reference point of the indicator rod, and the display shows the measured value of the turnout gap in real time. Its advantages are: it allows maintenance personnel to view the measured value of the turnout gap in real time, enabling them to promptly verify whether the measured value matches the actual value, ensuring that the gap adjustment is not incorrect due to a malfunction of the monitoring device.

[0014] Preferably, the monitoring device further includes a buzzer connected to the controller, which assists in identifying the adjustment status of the notch. Its advantages are: when maintenance personnel adjust the notch, the buzzer can emit different frequencies of beeping sounds according to the size of the notch, thus helping to remind maintenance personnel whether the notch is adjusted correctly. This avoids the need for another person to check whether the adjustment is correct when one person is adjusting the notch, as is required in existing technologies, thereby improving maintenance efficiency.

[0015] Preferably, the monitoring device further includes a LoRa wireless transmission module, through which the controller communicates with the control terminal. Its advantages include: the LoRa wireless transmission module features low power consumption, strong anti-interference performance, and long-distance transmission; transmission distances in open areas can reach over 10km; it can achieve multi-level relay networking; and it eliminates the need for additional signal cables as data transmission lines, reducing installation difficulty and costs. Furthermore, a single LoRa gateway can connect thousands or even tens of thousands of LoRa nodes, making it highly suitable for locations with dispersed and numerous railway signaling equipment.

[0016] Preferably, the monitoring device further includes a temperature sensor connected to the controller. Its advantage lies in assisting in determining the impact of temperature on the size of the turnout gap. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the turnout gap monitoring device according to an embodiment of the present invention;

[0018] Figure 2 This is a structural block diagram of the turnout gap monitoring device according to an embodiment of the present utility model;

[0019] Figure 3 for Figure 1 The diagram shows the installation of the turnout gap monitoring device and the switch machine.

[0020] Figure 4 for Figure 1 The diagram shows the structure of the first end of the housing of the turnout gap monitoring device. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this utility model pertains. The terms "comprising" and similar expressions used herein mean that the element or object preceding the word covers the element or object listed following the word and its equivalents, but does not exclude other elements or objects.

[0022] To overcome the problems existing in the prior art, this utility model provides a turnout gap monitoring device. By converting the linear motion of the indicator rod in the switch machine into the rotational motion of the rotating wheel, the displacement of the indicator rod in the switch machine is obtained, thereby determining whether the turnout gap is within the normal range. There is no need for video data acquisition and transmission, which reduces the probability of display lag and system crashes. Moreover, there is no need to install cameras or other sensors in the switch machine, which simplifies the installation process and is less expensive than using video sensors.

[0023] Figure 1 This is a schematic diagram of the turnout gap monitoring device according to an embodiment of the present invention; Figure 2 This is a structural block diagram of the turnout gap monitoring device according to an embodiment of the present utility model; Figure 3 for Figure 1 The diagram shows the installation of the turnout gap monitoring device and the switch machine. In some embodiments of this utility model, reference is made to... Figures 1 to 3 The turnout gap monitoring device includes a transmission assembly, an angle detection element 1, and a controller 2. The transmission assembly includes a rotating wheel 3 and a transmission mechanism. The transmission mechanism is connected to an indicator rod 110 in the switch machine 100. The rotating wheel 3 is connected to the transmission mechanism, and the transmission mechanism drives the rotating wheel 3 to rotate as the indicator rod 110 moves. The angle detection element 1 is disposed on the rotating wheel 3 and coaxially connected to the rotating wheel 3 to detect the rotation angle of the rotating wheel 3. The controller 2 is connected to the angle detection element 1, and the controller 2 is used to determine whether the turnout gap is within the normal range based on the rotation angle.

[0024] Specifically, the transmission assembly includes a rotating wheel 3 and a transmission mechanism. The transmission mechanism is connected to the indicator rod 110 in the switch machine 100. The rotating wheel 3 is connected to the transmission mechanism. The transmission mechanism drives the rotating wheel 3 to rotate as the indicator rod 110 moves, thus converting the linear motion of the indicator rod 110 in the switch machine 100 into the rotational motion of the rotating wheel 3, that is, converting the linear displacement of the indicator rod 110 into the angular displacement of the rotating wheel 3. The angle detection element 1 is disposed on the rotating wheel 3 and coaxially connected to the rotating wheel 3 to detect the rotation angle of the rotating wheel 3, that is, the angular displacement of the rotating wheel 3 can be measured by the angle detection element 1. The controller 2 is connected to the angle detection element. The controller 2 is used to determine whether the turnout gap is within the normal range based on the rotation angle. Specifically, the controller 2 reads and outputs the angular displacement of the rotating wheel 3 collected by the angle detection device 1, thereby obtaining the displacement of the indicator rod 110 in the switch machine 100. This allows for the determination of whether the turnout gap is within the normal range, eliminating the need for video data acquisition and transmission, thus reducing the probability of display lag and system crashes. This invention uses an angle detection device for gap displacement monitoring, which reduces costs compared to using video sensors. Furthermore, this invention eliminates the need to install cameras or other sensors inside the switch machine, simplifying the installation process. It achieves simple, convenient, and efficient turnout gap monitoring, has strong applicability, wide application, and good application prospects.

[0025] In some embodiments of this utility model, reference is made to Figure 1 and Figure 3 The transmission mechanism includes a synchronous belt 4, a synchronous pulley 5, a slider 6, and a guide rail 7. The slider 6 is slidably mounted on the guide rail 7. The two ends of the synchronous belt 4 are respectively sleeved on the rotating wheel 3 and the synchronous pulley 5. The slider 6 is fixedly connected to the indicator rod 110, and the slider 5 is fixedly mounted to the synchronous belt 4, so that the synchronous belt 4 rotates in a ring as the indicator rod 110 moves, thereby driving the rotating wheel 3 to rotate. The synchronous belt 4 transmission has the characteristics of accurate transmission ratio, no slippage, constant speed ratio, and smooth transmission. Unlike gears, it is not easily affected by sand and gravel, thus improving measurement accuracy. At the same time, this transmission mechanism has the advantages of oil resistance, good wear resistance, and good anti-aging performance, making it suitable for outdoor environments. Moreover, the use of the guide rail 7 and slider 6 transmission can minimize the resistance of the monitoring device to the indicator rod 110, basically not affecting the turnout locking and reducing the impact on the turnout rotation process.

[0026] For details, please refer to Figures 1 to 3When the indicator rod 110 in the switch machine 100 moves, it drives the slider 6 to slide along the guide rail 7, which in turn drives the synchronous belt 4 fixed to the slider 6 to move. The movement of the synchronous belt 4 drives the rotating wheel 3 and the angle detection element 1 to rotate. In this way, the linear displacement change of the indicator rod 110 in the switch machine 100 is converted into the rotational displacement change of the angle detection element 1. The controller 2 reads the rotation angle of the angle detection element 1 and outputs it. After calculation, the displacement of the indicator rod 110 in the switch machine 100 can be obtained. The displacement deviation of the switch machine 100 at the same position (positioning or reversing) is the change in the turnout gap. The change in the turnout gap plus the initial standard gap value (the standard gap of the ZYJ7 switch machine main unit is 2±0.5mm, and the gap of the ZD6 switch machine is 1.5±0.5mm) is the real-time turnout gap size. The specific calculation of the turnout gap is common knowledge in the field and will not be elaborated here.

[0027] Figure 4 for Figure 1 The diagram shows the structure of the first end of the housing of the turnout gap monitoring device.

[0028] In some embodiments of this utility model, reference is made to Figure 1 , Figure 2 and Figure 4 The turnout gap monitoring device also includes a device housing 8, which has a first bolt hole 81. The switch machine 100 has a second bolt hole (not shown in the figure). The monitoring device is connected and fixed to the switch machine 100 by bolts passing through the first bolt hole 81 and the second bolt hole (not shown in the figure). The device housing 8 has a receiving cavity 82 and a mounting part 84 facing the first side end 83 of the switch machine 100. The transmission component and the angle detection component 1 are both disposed in the receiving cavity 82, and the controller 2 is fixedly disposed in the mounting part 84. The monitoring device is installed on the outside of the switch machine 100 by bolts without changing any original components of the switch machine 100. The monitoring device is easy to install and replace, and has high applicability. This monitoring device is applicable to most turnouts in the prior art, whether the indicator rod 110 in the switch machine 100 is linked or separate. The second bolt hole can use the original bolt hole on the switch machine 100, so that the first bolt hole 81 can be opened at the corresponding position of the first side end 83 of the monitoring device.

[0029] In some embodiments of this utility model, reference is made to Figure 1 , Figure 2 and Figure 4The first side end 81 is provided with a first through portion 85, and the indicator rod 110 passes through the first through portion 85 and is spaced apart from the outer bottom of the receiving cavity 82; the bottom of the receiving cavity 82 is provided with a second through portion 86, and the second through portion 86 is arranged parallel to the guide rail 7; the monitoring device also includes a connecting rod 9, one end of the connecting rod 9 is fixedly connected to the slider 6, and the other end of the connecting rod 9 passes through the second through portion 86 and is fixedly connected to the indicator rod 110. The design is ingenious and highly integrated, which helps to reduce the overall size of the monitoring device and avoids affecting the original components of the switch machine. Moreover, the slider 6 and the indicator rod 110 are connected by the connecting rod 9, which allows the slider 6 to minimize the resistance of the monitoring device to the indicator rod 110, thus improving measurement accuracy.

[0030] In some embodiments of this utility model, reference is made to Figure 3 The other end of the connecting rod 9 is connected and fixed to the indicator rod 110 by a fixing member 91.

[0031] In some embodiments of this utility model, the fixing element is a screw or a pin, etc.

[0032] In some embodiments of this utility model, reference is made to Figure 1 and Figure 3 The monitoring device further includes an adjusting component 10. The second side end 87 of the device housing 8, facing away from the switch machine 100, has a threaded through hole. The adjusting component 10 passes through the threaded through hole and is connected to the synchronous pulley 5. Rotating the adjusting component 10 forward or backward causes the synchronous pulley 5 to move towards or away from the rotating wheel 3, thereby adjusting the tension of the synchronous belt 4. This improves measurement accuracy and reduces the impact on the turnout rotation process. The second side end 87 and the first side end 83 are symmetrical sides of the device housing 8.

[0033] In some embodiments of this utility model, reference is made to Figure 1 and Figure 3 Both the transmission assembly and the angle detection component 1 are provided in two sets, and the guide rails 7 in the two sets of transmission assemblies are arranged in parallel. The sliders 6 in the two sets of transmission assemblies are respectively connected to the two sets of indicator rods 110 in the switch machine 100.

[0034] In some embodiments of this utility model, reference is made to Figure 2The monitoring device also includes a zero-point calibration button 11 and a display 12, both of which are connected to the controller 2. The zero-point calibration button 11 drives the controller 2 to record the zero reference point of the indicator rod 110, and the display 12 displays the measured value of the turnout gap in real time. This allows maintenance personnel to view the measured value of the turnout gap in real time, enabling them to promptly verify whether the measured value matches the actual value, ensuring that the gap adjustment is not incorrect due to a malfunction of the monitoring device.

[0035] Specifically, when the turnout gap monitoring device is first installed, the turnout gap is first adjusted to zero, and then the zero-point calibration button is pressed. The controller will use the output value of the angle detection element at this time as the zero reference point and store it. After that, the movement of the turnout will drive the indicator rod and the rotating wheel to move in sequence. The controller reads and outputs the angular displacement of the rotating wheel collected by the angle detection element, thereby obtaining the displacement of the indicator rod in the turnout. The displacement of the turnout movement, that is, the angular displacement of the rotating wheel detected by the angle detection element, and the displacement difference between the zero reference point and the displacement of the rotating wheel are the gap size. In this way, the measured value of the gap can be obtained and displayed on the display.

[0036] In some embodiments, the controller is a microcontroller.

[0037] In some specific embodiments, the controller is an STM32 microcontroller.

[0038] In some embodiments, the display device is an LCD liquid crystal display screen, which is connected to the microcontroller and used to display the size of the notch in real time.

[0039] In some embodiments, the LCD display screen and the zero-point calibration button are disposed on the device housing.

[0040] In some embodiments of this utility model, reference is made to Figure 2 The monitoring device also includes a buzzer 13, which is connected to the controller 2. The buzzer 13 is used to assist in identifying the adjustment status of the notch. When maintenance personnel adjust the notch, the buzzer 13 can emit a buzzing sound of different frequencies according to the size of the notch, thus helping to remind maintenance personnel whether the notch has been adjusted properly. This avoids the situation in the prior art where one person adjusts the notch and another person must check whether it has been adjusted properly, thereby improving maintenance efficiency.

[0041] In some embodiments, the buzzer is an active high-decibel buzzer, which is connected to the microcontroller to assist in identifying the notch adjustment status.

[0042] In some embodiments of this utility model, reference is made to Figure 2The monitoring device also includes a LoRa wireless transmission module 14, through which the controller 2 communicates with the control terminal 200. The LoRa wireless transmission module 14 features low power consumption, strong anti-interference performance, and long-distance transmission; its transmission range in open areas can exceed 10km. It can achieve multi-level relay networking without requiring additional signal cables as data transmission lines, reducing installation difficulty and costs. Furthermore, a single LoRa gateway can connect thousands or even tens of thousands of LoRa nodes, making it ideal for locations with dispersed and numerous railway signaling equipment.

[0043] In some embodiments of this utility model, reference is made to Figure 2 The monitoring device also includes a temperature sensor 15, which is connected to the controller 2 to help determine the effect of temperature on the size of the turnout gap.

[0044] In some embodiments of this utility model, the angle detection component is an absolute encoder. The absolute encoder has the characteristic of unique position, which makes it convenient to calculate the displacement of the indicator rod in the switch machine. The absolute encoder has a temperature range of -40°C to 85°C, which is basically applicable to all turnout gap monitoring, and is very convenient to install, disassemble and replace.

[0045] In some other preferred embodiments, the absolute encoder is a 15-bit absolute encoder, which can achieve a measurement accuracy of 0.01 degrees resolution, thus improving measurement accuracy.

[0046] In some embodiments of this utility model, the microcontroller communicates with the absolute encoder via an RS485 interface, and the microcontroller periodically sends data read commands to the absolute encoder and processes the data returned by the absolute encoder.

[0047] In some embodiments of this invention, if the transmission distance is short, the data processed by the microcontroller is transmitted back to the control terminal of the signal building via the LORA wireless module.

[0048] In some embodiments of this invention, when the LORA network is far away, LORA repeaters, LORA gateways, and control terminals can be connected via Ethernet (RJ45 interface) to increase device compatibility.

[0049] In some embodiments of this utility model, the control terminal is a microcomputer control terminal, which displays the gaps in the turnout switching machines in the station yard in real time and stores the data for easy access and playback by maintenance personnel.

[0050] Although the embodiments of this utility model have been described in detail above, it will be apparent to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations fall within the scope and spirit of this utility model as described in the claims. Moreover, the utility model described herein may have other embodiments and can be implemented or realized in various ways.

Claims

1. A turnout gap monitoring device, characterized by, The application relates to a monitoring device for a turnout, which comprises the following parts: a transmission assembly, an angle detection part and a controller. The transmission assembly comprises a rotating wheel and a transmission mechanism, the transmission mechanism is connected with a representation rod in a turnout, the rotating wheel is connected with the transmission mechanism, and the transmission mechanism drives the rotating wheel to rotate when the representation rod moves. The angle detection part is arranged on the rotating wheel and coaxially connected with the rotating wheel to detect the rotating angle of the rotating wheel. The controller is connected with the angle detection part, the angle detection part is an absolute value encoder, the controller is used for reading and outputting the angle displacement of the rotating wheel collected by the angle detection part to obtain the displacement of the representation rod in the turnout.

2. The switch gap monitoring device of claim 1, wherein, The transmission mechanism comprises a synchronous belt, a synchronous belt wheel, a sliding block and a guide rail, the sliding block is slidingly arranged on the guide rail, two ends of the synchronous belt are sleeved with the rotating wheel and the synchronous belt wheel respectively, the sliding block is fixedly connected with the representation rod, and the sliding block is fixedly arranged with the synchronous belt, so that the synchronous belt rotates in a ring shape to drive the rotating wheel to rotate when the representation rod moves.

3. A switch gap monitoring device according to claim 2, characterised in that, The device housing is provided with a first bolt hole, the turnout is provided with a second bolt hole, and the monitoring device is connected and fixed with the turnout by penetrating the first bolt hole and the second bolt hole through bolts. The device housing is provided with a receiving cavity and an installation part at a first side end of the device housing which faces the turnout, the transmission assembly and the angle detection part are arranged in the receiving cavity, and the controller is fixedly arranged on the installation part.

4. A switch gap monitoring device according to claim 3, characterised in that, The second side end of the device housing which faces away from the turnout is provided with a threaded through hole, the adjusting part penetrates the threaded through hole and is connected with the synchronous belt wheel, so that the adjusting part rotates in a forward direction or a reverse direction to drive the synchronous belt wheel to move towards or away from the rotating wheel, thereby adjusting the tightness of the synchronous belt.

5. The switch gap monitoring device of claim 3, wherein, The first side end is provided with a first penetrating part, the representation rod penetrates the first penetrating part and is arranged in a gap with the outer bottom of the receiving cavity. The bottom of the receiving cavity is provided with a second penetrating part, and the second penetrating part is arranged in parallel with the guide rail. The monitoring device further comprises a connecting rod, one end of the connecting rod is fixedly connected with the sliding block, and the other end of the connecting rod penetrates the second penetrating part and is fixedly connected with the representation rod.

6. The switch gap monitoring device of claim 2, wherein, The transmission assembly and the angle detection part are both provided with two groups, the guide rails in the two groups of transmission assemblies are arranged in parallel, and the sliding blocks in the two groups of transmission assemblies are respectively connected with two groups of representation rods in the turnout.

7. The switch gap monitoring device of claim 1, wherein, The monitoring device further comprises a zero point calibration button and a display part, the zero point calibration button and the display part are both connected with the controller, the zero point calibration button is used for driving the controller to record the zero reference point of the representation rod, and the display part is used for displaying the measurement value of the turnout gap in real time.

8. The switch gap monitoring device of claim 1, wherein, The monitoring device further comprises a buzzer, the buzzer is connected with the controller, and the buzzer is used for assisting in identifying the gap adjustment condition.

9. The switch gap monitoring device of claim 1, wherein, The monitoring device further comprises a LORA wireless transmission module, and the controller is in communication connection with a control terminal through the LORA wireless transmission module.

10. The switch gap monitoring device of claim 1, wherein, The monitoring device further comprises a temperature sensor, and the temperature sensor is connected with the controller.

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