A residual current type electrical fire monitoring and detecting device and a detecting method

Abstract

The present application relates to a residual current type electrical fire monitoring and detecting device and a detecting method, belonging to the field of detector technology. It includes a sensor and a signal processing unit. The sensor is annular, and a fixing ring is disposed opposite on the sensor. The center of the fixing ring is aligned with the center of the sensor. A connecting component is arranged on the fixing ring, and the connecting component is used to connect and fix the fixing ring on the sensor. A first slider and a second slider are slidably arranged on the inner side wall of the fixing ring. The first slider and the second slider are arranged staggeredly. A fixing rope is connected between the first slider and the second slider. A first driving mechanism and a second driving mechanism are also arranged on the fixing ring. The first driving mechanism drives the first slider to move around the inner wall of the fixing ring, and the second driving mechanism is used to drive the second slider to move around the inner wall of the fixing ring in the opposite direction to the first slider. The present application has the effect of facilitating the concentration and fixation of multiple wires at the center position of the sensor.

Description

Technical Field

[0001] The present application relates to the field of detector technology, and in particular, to a residual current type electrical fire monitoring and detecting device and a detecting method. Background Technique

[0002] A residual current type fire monitoring detector is a detector used to monitor the change of the residual current value in the protected line. When the residual current in the protected electrical line exceeds the alarm setting value, it can issue alarm and control signals. It is generally composed of a residual current sensor and a signal processing unit. The residual current sensor is used to measure the change of the residual current value in the protected line, and is generally made of a closed-loop high-permeability iron core material (such as high-permeability nickel steel or nanocrystalline alloy, etc.). When there is a residual current in the protected line passing through the residual current sensor, the residual current sensor transmits the sensed data to the signal processing unit.

[0003] When installing a residual current type electrical fire monitoring detector, an installation method that meets the residual current detection accuracy needs to be adopted. The bare live wire should maintain a safe distance from the residual current sensor, and the detected wire should be concentrated at the center of the circle of the residual current sensor when passing through the residual current sensor.

[0004] In view of the above related technologies, in actual operation, there are multiple wires passing through the residual current sensor. The wires are flexible and not easy to fix. At the same time, the multiple wires are not connected together, and it is difficult to concentrate and fix the multiple wires at the center position of the residual current sensor. Summary of the Invention

[0005] In order to facilitate the concentration and fixation of multiple wires at the center position of the sensor, the present application provides a residual current type electrical fire monitoring and detecting device and a detecting method.

[0006] On the one hand, the present application provides a residual current type electrical fire monitoring and detecting device, adopting the following technical solution:

[0007] A residual current type electrical fire monitoring and detecting device includes a sensor and a signal processing unit. The sensor is annular, and a fixing ring is oppositely arranged on the sensor. The center of the fixing ring is opposite to the center of the sensor. A connecting component is arranged on the fixing ring, and the connecting component is used to connect and fix the fixing ring on the sensor. A first slider and a second slider are slidably arranged on the inner side wall of the fixing ring. The first slider and the second slider are arranged alternately. A fixing rope is connected between the first slider and the second slider. A first driving mechanism and a second driving mechanism are also arranged on the fixing ring. The first driving mechanism drives the first slider to move around the inner wall of the fixing ring, and the second driving mechanism is used to drive the second slider to move around the inner wall of the fixing ring in the opposite direction to the first slider.

[0008] By adopting the above technical solution, the fixing ring is fixedly installed on the sensor through the connecting component. The sensor and the fixing ring are sleeved outside the wire to be detected. The first driving mechanism and the second driving mechanism drive the first slider and the second slider to move in opposite directions along the inner wall of the fixing ring. The fixing rope is wound around the wire to be detected. As the fixing rope component is wound and tightened, multiple wires are bundled into a bunch, and at the same time, a bunch of wires is tightened in the center of the fixing ring, so as to achieve the effect of facilitating the fixing of the wire to be detected in the center of the sensor.

[0009] Optionally, the connecting component includes a circular velcro tape, and the mother and son sides of the velcro tape are respectively arranged on the opposite surfaces of the fixing ring and the sensor.

[0010] By adopting the above technical solution, the mother and son sides of the velcro tape are respectively arranged on the opposite surfaces of the fixing ring and the sensor. When installing the fixing ring on the sensor, just align the fixing ring with the sensor and bond it to the sensor, achieving the effect of facilitating the fixing of the fixing ring on the sensor.

[0011] Optionally, a first annular gear and a second annular gear are rotatably arranged in the fixing ring. The first slider is fixedly arranged on the inner wall of the first annular gear, and the second slider is fixedly arranged on the inner wall of the second annular gear. The first driving mechanism is used to drive the first annular gear to rotate, and the second driving mechanism is used to drive the second annular gear to rotate. The first annular gear and the second annular gear rotate in opposite directions.

[0012] By adopting the above technical solution, the first driving mechanism and the second driving mechanism drive the first annular gear and the second annular gear to rotate in opposite directions, and then drive the first slider on the first annular gear and the second slider on the second annular gear to move in opposite directions, achieving the effect of facilitating the driving of the first slider and the second slider to move in opposite directions.

[0013] Optionally, both the first driving mechanism and the second driving mechanism include a rotating member and a rotating shaft. An accommodating cavity is formed in the fixing ring. The rotating shaft is vertically rotatably arranged on the fixing ring and is located in the accommodating cavity. A driving gear is coaxially arranged at one end of the rotating shaft. The driving gear in the first driving mechanism meshes with the first annular gear, and the driving gear in the second driving mechanism meshes with the second annular gear. The rotating member is used to drive the rotating shaft to rotate, and the rotating shafts in the first driving mechanism and the second driving mechanism rotate in opposite directions.

[0014] By adopting the above technical solution, the rotating member drives the rotating shaft to rotate, the rotating shaft drives the driving gear arranged on the rotating shaft to rotate, the first annular gear meshes with the driving gear in the first driving mechanism, the second annular gear meshes with the driving gear in the second driving structure, and the rotating directions of the rotating shafts in the first driving mechanism and the second driving mechanism are opposite, so as to achieve the effect of facilitating the reverse rotation of the first annular gear and the second annular gear.

[0015] Optionally, the rotating member includes a first pulling rope and a second pulling rope. The first pulling rope and the second pulling rope are respectively fixedly connected to both ends of the rotating shaft. One of the first pulling rope and the second pulling rope is always wound around the rotating shaft, and both the first pulling rope and the second pulling rope extend to the outside of the fixed ring at one end.

[0016] By adopting the above technical solution, the first pulling rope and the second pulling rope are respectively fixedly connected to both ends of the rotating shaft, and one of the first pulling rope and the second pulling rope is always wound around the rotating shaft. Pull the first pulling rope or the second pulling rope wound around the rotating shaft, the rotating shaft rotates, and at the same time the other rope body is wound around the rotating shaft; when driving the rotating shaft to rotate in the reverse direction, pull the other rope body; thus facilitating the forward and reverse rotation of the rotating shaft.

[0017] Optionally, handles for easy gripping are provided at the ends of the first pulling rope and the second pulling rope.

[0018] By adopting the above technical solution, the handles facilitate the operator to hold the first pulling rope and the second pulling rope, and at the same time facilitate the operator to pull the first pulling rope and the second pulling rope.

[0019] Optionally, the handle is hollow, a first winding shaft is arranged inside the handle, a first winding wheel is rotatably arranged on the first winding shaft, a first scroll spring is arranged between the first winding shaft and the first winding roller, the first pulling rope and the second pulling rope are respectively connected to the corresponding first winding wheels, and the maximum elastic force of the first scroll spring is less than the friction force received by the first annular gear and the second annular gear.

[0020] By adopting the above technical solution, when the first pulling rope is gradually wound onto the rotating shaft, the first pulling rope pulls the first scroll spring and drives the first scroll spring to compress. Since the maximum elastic force of the first scroll spring is less than the friction force received by the first annular gear and the second annular gear, the first scroll spring cannot drive the rotating shaft to rotate in the reverse direction through the first pulling rope; thus, under the action of the first scroll spring, the part of the first pulling rope outside the fixed ring is retracted into the handle; the principle of the handle on the second rope body is the same; achieving the effect of facilitating the storage of the parts of the first pulling rope and the second pulling rope outside the fixed ring.

[0021] Optionally, the first slider is hollow, and a second wire winding shaft is arranged inside the first slider. A second wire winding wheel is rotatably arranged on the second wire winding shaft. A second scroll spring is arranged between the second wire winding shaft and the second wire winding wheel. The second wire winding wheel is connected to a fixing rope, and the second scroll spring makes the second wire winding wheel always have a tendency to wind up the fixing rope.

[0022] By adopting the above technical solution, the second scroll spring makes the second wire winding wheel always have a tendency to wind up the fixing rope, so as to facilitate winding the redundant fixing rope onto the second wire winding wheel, avoiding the redundant space occupied by the fixing rope bent and placed in the fixing ring, and avoiding affecting the threading of the wire into the fixing ring.

[0023] On the other hand, the present application provides a method for detecting residual current type electrical fire monitoring, including the following steps:

[0024] S1: Connect and install the fixing ring on the sensor through a connecting component, and make the inner ring of the fixing ring face the inner ring of the sensor; S2: Sleeve the fixing ring and the sensor on the wire to be detected; S3: Use the first driving mechanism to drive the first slider to move along the inner wall of the fixing ring, and drive the second slider to move along the inner wall of the fixing ring in the opposite direction to the first slider through the second driving mechanism. When the first slider and the second slider move, the fixing rope is wound around the wire to be detected. As the fixing rope is tightened, multiple wires are bundled into a bunch and tightened and fixed in the center of the fixing ring; S4: After the detection is completed, the first driving mechanism and the second driving mechanism drive the first slider and the second slider to move in the opposite direction in step S3, so that the fixing rope is separated from the wire; S5: Remove the sensor and the fixing ring from the wire to be detected to complete the detection.

[0025] By adopting the above technical solution, when detecting the wire, the first slider and the second slider are driven to move in the opposite direction. At this time, the fixing ropes on the first slider and the second slider are wound around multiple wires in the sensor. As the fixing ropes are wound and tightened, multiple wires are squeezed and bundled into a bunch, and at the same time, the whole bunch of wires is tightened and fixed in the center of the fixing ring, thereby fixing the wire at the center position of the sensor.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. The fixing ring is fixedly installed on the sensor through a connecting component, and the sensor and the fixing ring are sleeved outside the wire to be detected. The first driving mechanism and the second driving mechanism are used to drive the first slider and the second slider to move in the opposite direction along the inner wall of the fixing ring. The fixing rope is wound around the wire to be detected. As the fixing rope assembly is wound and tightened, multiple wires are bundled into a bunch, and at the same time, a bunch of wires is tightened in the center of the fixing ring, so as to achieve the effect of facilitating the fixing of the wire to be detected in the center of the sensor;

[0028] 2. The rotating member drives the rotating shaft to rotate. The rotating shaft drives the driving gear arranged on the rotating shaft to rotate. The first annular gear meshes with the driving gear in the first driving mechanism, and the second annular gear meshes with the driving gear in the second driving structure. The rotating directions of the rotating shafts in the first driving mechanism and the second driving mechanism are opposite, so as to achieve the effect of facilitating the reverse rotation of the first annular gear and the second annular gear.

[0029] 3. The first pulling rope and the second pulling rope are respectively fixedly connected to both ends of the rotating shaft, and one of the first pulling rope and the second pulling rope is always wound around the rotating shaft. Pull the first pulling rope or the second pulling rope wound around the rotating shaft, and the rotating shaft rotates. At the same time, the other rope body is wound around the rotating shaft; when driving the rotating shaft to rotate in the reverse direction, pull the other rope body; thus, it is convenient to drive the rotating shaft to rotate forward and backward. Description of the Drawings

[0030] Figure 1 It is a schematic diagram for showing the structure of the residual current type electrical fire monitoring and detecting device.

[0031] Figure 2 It is a schematic diagram for showing the installation position of the fixing ring in the embodiment of the present application.

[0032] Figure 3 It is a sectional view for showing the internal structure of the fixing ring in Embodiment 1 of the present application.

[0033] Figure 4 It is a sectional view for showing the structure of the handle in Embodiment 1 of the present application.

[0034] Figure 5 It is a sectional view for showing the structure of the first slider in Embodiment 2 of the present application.

[0035] Description of the Reference Numerals:

[0036] 1. Sensor; 11. Hook-and-loop fastener; 2. Signal processing unit; 3. Fixing ring; 31. First slider; 311. Second winding shaft; 312. Second winding wheel; 313. Second volute spring; 32. Second slider; 33. Fixing rope; 34. First annular gear; 35. Second annular gear; 36. Accommodating cavity; 4. First driving mechanism; 5. Second driving mechanism; 51. Rotating member; 511. First pulling rope; 512. Second pulling rope; 52. Rotating shaft; 53. Driving gear; 6. Handle; 61. First winding shaft; 62. First winding wheel; 63. First volute spring. Detailed Embodiment

[0037] The following is a further detailed description of the present application in conjunction with the attached Figures 1-5 drawings.

[0038] Embodiment 1:

[0039] This application embodiment discloses a residual current type electrical fire monitoring and detecting device. Refer to Figure 1 and a residual current type electrical fire monitoring and detecting device includes a sensor 1 and a signal processing unit 2. There is a wired communication connection between the sensor 1 and the signal processing unit 2. The sensor 1 is annular, and the sensor 1 is made of a high-permeability iron core material, such as high-permeability nickel steel or nanocrystalline alloy and other materials.

[0040] Refer to Figure 2 and Figure 3 and a fixing ring 3 is installed opposite to the sensor 1. The size of the fixing ring 3 is the same as that of the sensor 1, and the center of the fixing ring 3 is directly opposite to the center of the sensor 1. A connecting component is arranged on the fixing ring 3, and the connecting component is used to detachably connect and install the fixing ring 3 on the sensor 1. A first slider 31 and a second slider 32 are slidably installed on the inner side wall of the fixing ring 3. The first slider 31 and the second slider 32 are arranged in a staggered manner, that is, the first slider 31 and the second slider 32 are located on different horizontal planes, and the first slider 31 and the second slider 32 are located at both ends of one diameter of the fixing ring 3. A fixing rope 33 is fixedly connected between the first slider 31 and the second slider 32, and the length of the fixing rope 33 is greater than the diameter length of the fixing ring 3. A first driving mechanism 4 and a second driving mechanism 5 are further installed on the fixing ring 3. The first driving mechanism 4 is connected to the first slider 31 and is used to drive the first slider 31 to move around the inner wall of the fixing ring 3. The second driving mechanism 5 is connected to the second slider 32 and is used to drive the second slider 32 to move around the inner wall of the fixing ring 3. The moving directions of the first slider 31 and the second slider 32 are opposite.

[0041] When detecting a wire, align the sensor 1 with the fixing ring 3, connect and fix the fixing ring 3 on the sensor 1 through the connecting component, pass multiple wires to be detected through the sensor 1, drive the first slider 31 to move through the first driving mechanism 4, and drive the second slider 32 to move through the second driving mechanism 5, so that the first slider 31 and the second slider 32 move in opposite directions; the fixing rope 33 connected to the first slider 31 and the second slider 32 coils multiple wires in the sensor 1. As the first slider 31 and the second slider 32 move, the fixing rope 33 tightens and binds multiple wires into a bundle. At the same time, the fixing rope 33 tightens and fixes a bundle of wires in the center of the sensor 1, thereby ensuring the detection accuracy of the sensor 1.

[0042] Refer to Figure 2, the connecting component includes a loop-and-hook fastener 11, and the male and female sides of the loop-and-hook fastener 11 are respectively arranged on the opposite faces of the fixed ring 3 and the sensor 1. In this embodiment, the male and female sides of the fastener 11 are respectively fixedly connected to the top surface of the sensor 1 and the bottom surface of the fixed ring 3; in other embodiments, the male and female sides of the fastener 11 can also be respectively fixedly connected to the bottom surface of the sensor 1 and the top surface of the fixed ring 3. According to the actual use conditions, the fixed ring 3 is detachably connected to the bottom or top of the sensor 1 through the fastener 11, and it is necessary to ensure that the center of the fixed ring 3 is directly opposite to the center of the sensor 1 during installation.

[0043] Referring to Figure 3 , a first annular gear 34 and a second annular gear 35 are rotatably installed in the fixed ring 3. The first annular gear 34 and the second annular gear 35 are directly opposite in the vertical direction. The inner diameters of the first annular gear 34 and the second annular gear 35 are the same as the inner diameter of the fixed ring 3. Guide blocks are fixedly connected to both sides of the first annular gear 34 and the second annular gear 35. Annular guide grooves are oppositely formed on the fixed ring 3 corresponding to the guide blocks. The guide blocks are slidably installed in the guide grooves, so that the first annular gear 34 and the second annular gear 35 can only rotate around the center of the fixed ring 3. A first slider 31 is fixedly connected to the inner wall of the first annular gear 34, and a second slider 32 is fixedly connected to the inner wall of the second annular gear 35. The first driving mechanism 4 is used to drive the first annular gear 34 to rotate, and the second driving mechanism 5 is used to drive the second annular gear 35 to rotate, and the rotation directions of the first annular gear 34 and the second annular gear 35 are opposite.

[0044] Referring to Figure 3 , the first driving mechanism 4 and the second driving mechanism 5 are respectively installed at both ends of the fixed ring 3, and both are located on the same diameter of the fixed ring 3. The first driving mechanism 4 and the second driving mechanism 5 both include a rotating member 51 and a rotating shaft 52. An accommodating cavity 36 is formed in the fixed ring 3. The rotating shaft 52 is vertically rotatably installed in the fixed ring 3, and the rotating shaft 52 is located in the accommodating cavity 36. A driving gear 53 is coaxially fixedly installed at one end of the rotating shaft 52. The first annular gear 34 and the second annular gear 35 both extend into the accommodating cavity 36, and the driving gear 53 in the first driving mechanism 4 meshes with the first annular gear 34, and the driving gear 53 in the second driving mechanism 5 meshes with the second annular gear 35. The rotating member 51 is connected to the rotating shaft 52 and is used to drive the rotating shaft 52 to rotate, and the rotating shafts 52 in the first driving mechanism 4 and the second driving mechanism 5 rotate in opposite directions. In this embodiment, the first annular gear 34, the second annular gear 35, and the driving gear 53 are all bevel gears. In other embodiments, the first annular gear 34, the second annular gear 35, and the driving gear 53 can also be spur gears.

[0045] The first driving mechanism 4 and the second driving mechanism 5 respectively drive the rotating shafts 52 inside them to rotate. The rotating directions of the rotating shafts 52 in the first driving mechanism 4 and the second driving mechanism 5 are opposite, thereby driving the first annular gear 34 and the second annular gear 35 to rotate in opposite directions.

[0046] Referring to Figure 2 and Figure 3 , the rotating member 51 includes a first pulling rope 511 and a second pulling rope 512. The first pulling rope 511 and the second pulling rope 512 are respectively fixedly connected to both ends of the rotating shaft 52, and one end of both the first pulling rope 511 and the second pulling rope 512 passes through the fixing ring 3 and extends outside the fixing ring 3. One of the first pulling rope 511 and the second pulling rope 512 is always wound around the rotating shaft 52. As the first pulling rope 511 is continuously pulled out from the fixing ring 3, the second pulling rope 512 is gradually wound around the rotating shaft 52; as the second pulling rope 512 is continuously pulled out from the fixing ring 3, the first pulling rope 511 is gradually wound around the rotating shaft 52. The rotating direction of the rotating shaft 52 when pulling the first pulling rope 511 is opposite to the rotating direction of the rotating shaft 52 when pulling the second pulling rope 512. And when pulling the first pulling ropes 511 in the first driving mechanism 4 and the second driving mechanism 5, the rotating directions of the rotating shafts 52 in the first driving mechanism 4 and the second driving mechanism 5 are opposite.

[0047] Pull the two first pulling ropes 511 synchronously to drive the two rotating shafts 52 to rotate in opposite directions, thereby driving the first annular gear 34 and the second annular gear 35 to rotate in opposite directions, and fix multiple wires in the center of the sensor 1 through the fixing rope 33; after the wire detection is completed, pull the two second pulling ropes 512 synchronously to drive the rotating shafts 52 to rotate, and the fixing rope 33 loosens the multiple wires and disengages from the multiple guides, facilitating the removal of the fixing ring 3 and the sensor 1 from the wires.

[0048] Referring to Figure 2 and Figure 4, handles 6 that are convenient to hold are installed at the ends of the first pulling rope 511 and the second pulling rope 512. The handles 6 are frustum-shaped. And the handles 6 are hollow. Through holes connected to the internal space of the handles 6 are provided on the top surfaces of the frustum-shaped handles 6. The first rope body or the second rope body extends into the handles 6 through the through holes. A first winding shaft 61 is fixedly installed in the handles 6. A first winding wheel 62 is rotatably installed on the first winding shaft 61. A first scroll spring 63 is arranged between the first winding shaft 61 and the first winding roller. The inner side of the first scroll spring 63 is fixedly connected to the first winding shaft 61, and the outer side of the first scroll spring 63 is fixedly connected to the first winding wheel 62. The first pulling rope 511 and the second pulling rope 512 are respectively connected to the corresponding first winding wheels 62. The first scroll spring 63 makes the first pulling rope 511 or the second pulling rope 512 always have a tendency to be wound onto the first winding wheel 62. The maximum elastic force of the first scroll spring 63 is less than the sum of the frictional forces received by the first annular gear 34, the second annular gear 35, and the rotating shaft 52.

[0049] When the first pulling rope 511 is gradually wound around the rotating shaft 52, the first pulling rope 511 is pulled out from the first winding wheel 62 and pulls the first scroll spring 63 to compress. The first scroll spring 63 makes the first pulling rope 511 have a tendency to be wound around the first winding wheel 62. Since the maximum elastic force of the first scroll spring 63 is less than the sum of the frictional forces received by the first annular gear 34, the second annular gear 35, and the rotating shaft 52, the first scroll spring 63 cannot drive the rotating shaft 52 to rotate in the reverse direction through the first pulling rope 511. Thus, the first scroll spring 63 winds the part of the first pulling rope 511 outside the fixed ring 3 onto the first winding wheel 62. The principle of the handle 6 on the second pulling rope 512 is the same. Thus, it is convenient to store the parts of the first pulling rope 511 and the second pulling rope 512 outside the fixed ring 3.

[0050] The implementation principle of a residual current type electrical fire monitoring and detecting device in Embodiment 1 of this application is as follows: Align the fixed ring 3 and bond it to the sensor 1. Thread multiple wires to be measured through the fixed ring 3 and the sensor 1. Synchronously pull the two first pulling ropes 511 to drive the first slider 31 and the second slider 32 to move in the opposite direction along the inner wall of the fixed ring 3. The fixing rope 33 binds the multiple wires to be measured into a bundle. As the fixing rope 33 tightens, a bundle of wires is tightened and fixed in the center of the fixed ring 3. After the wire detection is completed, synchronously pull the two second pulling ropes 512 until the fixing rope 33 is separated from the wire to be detected, and take out the fixed ring 3 and the sensor 1 from the wire, completing the detection.

[0051] Embodiment 2:

[0052] Refer to Figure 2 and Figure 5, the first slider 31 is hollow, and a second winding shaft 311 is fixedly installed inside the first slider 31. A second winding wheel 312 is rotatably installed on the second winding shaft 311. A second scroll spring 313 is installed between the second winding shaft 311 and the second winding wheel 312. The inner side of the second scroll spring 313 is fixedly connected to the second winding shaft 311, and the outer side of the second scroll spring 313 is fixedly connected to the second winding wheel 312. The fixing rope 33 passes through the first slider 31 and extends into the first slider 31. The fixing rope 33 is connected to the second winding wheel 312 and wound around the second winding wheel 312. The second scroll spring 313 makes the second winding wheel 312 always have a tendency to wind up the fixing rope 33. Since the length of the fixing rope 33 is greater than the diameter of the fixing ring 3, the fixing rope 33 naturally hangs down inside the fixing ring 3, which is not convenient for storing the fixing rope 33. The second scroll spring 313 winds up the fixing rope 33 into the first slider 31. When fixing the wire, the fixing rope 33 is pulled out from the first slider 31, which plays a role in facilitating the storage of the fixing rope 33.

[0053] This application also discloses a residual current type electrical fire monitoring and detection method, including the following steps:

[0054] S1: Align the fixing ring 3 with the sensor 1, and bond the fixing ring 3 to the sensor 1 through the sticky tape 11;

[0055] S2: Slip the fixing ring 3 and the sensor 1 over the wire to be detected;

[0056] S3: Synchronously pull the two first pulling ropes 511. The two first pulling ropes 511 respectively drive the two rotating shafts 52 to rotate in the reverse direction, thereby driving the first annular gear 34 and the second annular gear 35 to rotate in the reverse direction, driving the first slider 31 on the first annular gear 34 and the second slider 32 on the second annular gear 35 to move in the reverse direction, and the fixing rope 33 is wound around the wire to be detected;

[0057] S4: Continue to pull the two first pulling ropes 511. As the fixing rope 33 is tightened, multiple wires are bundled into a bunch and tightly fixed in the center of the fixing ring 3;

[0058] S5: After the detection is completed, synchronously pull the two second pulling ropes 512, drive the first slider 31 and the second slider 32 to move in the reverse direction in step S3 until the fixing rope 33 is separated from the wire;

[0059] S6: Remove the sensor 1 and the fixing ring 3 from the wire to be detected to complete the detection.

[0060] Finally, it should be noted that: in the description of this application, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to this application.

[0061] The above are all preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A residual current type electrical fire monitoring and detecting device, comprising a sensor (1) and a signal processing unit (2), wherein the sensor (1) is annular. Characterized in that: A fixing ring (3) is oppositely arranged on the sensor (1), the center of the fixing ring (3) is opposite to the center of the sensor (1), a connecting component is arranged on the fixing ring (3), and the connecting component is used to connect and fix the fixing ring (3) on the sensor (1). A first slider (31) and a second slider (32) are slidably arranged on the inner side wall of the fixing ring (3), the first slider (31) and the second slider (32) are arranged alternately, a fixing rope (33) is connected between the first slider (31) and the second slider (32), and a first driving mechanism (4) and a second driving mechanism (5) are further arranged on the fixing ring (3). The first driving mechanism (4) drives the first slider (31) to move around the inner wall of the fixing ring (3), and the second driving mechanism (5) is used to drive the second slider (32) to move around the inner wall of the fixing ring (3) in the opposite direction to the first slider (31); a first annular gear (34) and a second annular gear (35) are rotatably arranged in the fixing ring (3), the first slider (31) is fixedly arranged on the inner wall of the first annular gear (34), the second slider (32) is fixedly arranged on the inner wall of the second annular gear (35), the first driving mechanism (4) is used to drive the first annular gear (34) to rotate, the second driving mechanism (5) is used to drive the second annular gear (35) to rotate, and the first annular gear (34) and the second annular gear (35) rotate in opposite directions.

2. A residual current type electrical fire monitoring and detecting device according to claim 1, Characterized in that: The connecting component includes an annular velcro tape (11), and the mother and son surfaces of the velcro tape (11) are respectively arranged on the opposite surfaces of the fixing ring (3) and the sensor (1).

3. A residual current type electrical fire monitoring and detecting device according to claim 1, Characterized in that: Both the first driving mechanism (4) and the second driving mechanism (5) include a rotating member (51) and a rotating shaft (52). An accommodating cavity (36) is formed in the fixing ring (3), the rotating shaft (52) is vertically rotatably arranged on the fixing ring (3) and is located in the accommodating cavity (36), a driving gear (53) is coaxially arranged at one end of the rotating shaft (52), the driving gear (53) in the first driving mechanism (4) is meshed with the first annular gear (34), and the driving gear (53) in the second driving mechanism (5) is meshed with the second annular gear (35). The rotating member (51) is used to drive the rotating shaft (52) to rotate, and the rotating shafts (52) in the first driving mechanism (4) and the second driving mechanism (5) rotate in opposite directions.

4. A residual current type electrical fire monitoring and detecting device according to claim 3, Characterized in that: The rotating member (51) includes a first pulling rope (511) and a second pulling rope (512). The first pulling rope (511) and the second pulling rope (512) are respectively fixedly connected to both ends of a rotating shaft (52). One of the first pulling rope (511) and the second pulling rope (512) is always wound around the rotating shaft (52). One end of both the first pulling rope (511) and the second pulling rope (512) extends outside the fixed ring (3).

5. An residual current type electrical fire monitoring and detecting device according to claim 4, characterized in that: Handles (6) for easy gripping are provided at the ends of the first pulling rope (511) and the second pulling rope (512).

6. An residual current type electrical fire monitoring and detecting device according to claim 5, characterized in that: The handle (6) is provided with a hollow interior. A first winding shaft (61) is arranged inside the handle (6). A first winding wheel (62) is rotatably arranged on the first winding shaft (61). A first scroll spring (63) is arranged between the first winding shaft (61) and the first winding wheel. The first pulling rope (511) and the second pulling rope (512) are respectively connected to the corresponding first winding wheel (62). The maximum elastic force of the first scroll spring (63) is less than the frictional force received by the first annular gear (34) and the second annular gear (35).

7. An residual current type electrical fire monitoring and detecting device according to claim 1, characterized in that: The first slider (31) is provided with a hollow interior. A second winding shaft (311) is arranged inside the first slider (31). A second winding wheel (312) is rotatably arranged on the second winding shaft (311). A second scroll spring (313) is arranged between the second winding shaft (311) and the second winding wheel (312). The second winding wheel (312) is connected to the fixed rope (33). The second scroll spring (313) makes the second winding wheel (312) always have a tendency to wind up the fixed rope (33).

8. A method for residual current type electrical fire monitoring and detection, using the residual current type electrical fire monitoring and detecting device according to any one of claims 1-7 above, characterized in that, comprising the following steps: S1: Connect and install the fixed ring (3) on the sensor (1) through a connection component, and make the inner ring of the fixed ring (3) face the inner ring of the sensor (1); S2: Sleeve the fixed ring (3) and the sensor (1) on the wire to be detected; S3: Use the first driving mechanism (4) to drive the first slider (31) to move along the inner wall of the fixed ring (3), and use the second driving mechanism (5) to drive the second slider (32) to move along the inner wall of the fixed ring (3) in the opposite direction to the first slider (31). When the first slider (31) and the second slider (32) move, the fixed rope (33) is wound around the wire to be detected. As the fixed rope (33) is tightened, multiple wires are bundled into a bundle and tightly fixed in the center of the fixed ring (3); S4: The detection is completed. Remove the sensor (1). The first driving mechanism (4) and the second driving mechanism (5) drive the first slider (31) and the second slider (32) to move in the opposite direction in step S3, so that the fixing rope (33) is separated from the wire. S5: Remove the sensor (1) and the fixing ring (3) from the wire under test to complete the detection.

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