Fire-fighting electrical line insulation detection device

Abstract

This utility model provides a fire protection electrical circuit insulation testing device, including a megohmmeter, a thermal imager, and a hollow-structured enclosure. The enclosure contains multiple sets of limiting members, each with a detachable mounting plate. Each mounting plate has two sets of mounting slots, in which the megohmmeter and thermal imager are respectively positioned. A switch is also located on the mounting plate between the megohmmeter and the thermal imager, connected to the megohmmeter. Near the bottom of the mounting plate, the enclosure contains a battery and wiring components, with the battery connected to both the switch and the wiring components. One side of the enclosure also has two sets of storage slots, each containing a contact rod. The bottom of each contact rod is connected to a plug via a wire, and the plugs pass through the storage slots to connect to the wiring components inside the enclosure. The megohmmeter measures insulation resistance to determine leakage risk, while the thermal imager uses infrared imaging to detect abnormal circuit temperatures. The combination of these two methods provides complementary quantitative and qualitative testing, improving the comprehensiveness and accuracy of fire protection circuit testing.

Description

Technical Field

[0001] This utility model belongs to the field of insulation testing technology, and more specifically, it relates to an insulation testing device for fire protection electrical circuits. Background Technology

[0002] Fire protection circuits play a crucial role in alarm systems, evacuation routes, and fire suppression. However, aging and damage to the insulation layer can lead to short circuits and leakage, which are major causes of electrical fires. Therefore, insulation testing can detect potential hazards in advance. Traditional methods for testing the insulation of fire protection circuits mainly rely on manually operated insulation resistance meters. However, this method is limited and lacks accuracy and comprehensiveness. It is difficult to detect hidden defects and potential risks in the circuits, and it cannot detect the decline in insulation performance caused by environmental changes, local aging, and other factors in a timely manner. This results in potential leakage and short circuit hazards in fire protection circuits during operation, increasing the risk of electrical fires. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a fire-fighting electrical circuit insulation testing device. This device solves the technical problems of existing fire-fighting insulation testing methods being singular, prone to result deviations, difficult to detect hidden dangers in the circuit, and unable to detect the decline in insulation performance in a timely manner, which in turn increases the risk of leakage and short circuit in fire-fighting circuits and increases the probability of electrical fires.

[0004] The purpose and effectiveness of this utility model's fire-fighting electrical circuit insulation testing device are achieved through the following specific technical means:

[0005] An insulation testing device for fire-fighting electrical circuits includes a megohmmeter, a thermal imager, and a hollow-structured enclosure. Multiple sets of limiting members are installed inside the enclosure, and a detachable mounting plate is installed within each limiting member. Two sets of mounting slots are formed on the mounting plate, and the megohmmeter and thermal imager are respectively installed in the two sets of mounting slots. A switch is also installed on the mounting plate between the megohmmeter and the thermal imager, and the switch is connected to the megohmmeter. A battery and a wiring component are installed inside the enclosure near the bottom of the mounting plate. The battery is connected to both the switch and the wiring component. Two sets of storage slots are also provided on one side of the enclosure. A contact rod is installed in each of the two sets of storage slots, and a plug is connected to the bottom of each of the two sets of contact rods via a wire. The two plugs pass through the two sets of storage slots and connect to the wiring component inside the enclosure.

[0006] The above technical solution further includes that the box body is also provided with a box cover, and a first connector and a second connector are respectively provided on the side of the box cover corresponding to the box body. The first connector is rotatably disposed inside the second connector, and the first connector and the second connector are fixed by a pivot pin.

[0007] The above technical solution further includes that two sets of latches are provided on the side of the box away from the second connector, and two sets of buckles are provided on the same side of the box cover corresponding to the two sets of latches, and the two sets of latches are respectively connected to the two sets of buckles.

[0008] The above technical solution further includes that a sponge cushioning pad is provided at one end of the lid near the box body.

[0009] The above technical solution further includes that an inspection port is provided on one side of the box body, and an installation groove is provided on two opposite sides of the inspection port, and the same set of disassembly plates are detachably inserted in the two sets of installation grooves.

[0010] The above technical solution further includes that the storage groove is provided with a mounting column, and an annular storage component is rotatably provided on the mounting column, and the wire is wound around the annular storage component; a torsion spring is sleeved on the mounting column, and the torsion spring contacts the inner side of the annular storage component.

[0011] The above technical solution further includes that a gripping part is provided on the outer side of the contact rod, and a gripping component made of rubber is also sleeved on the gripping part.

[0012] The above technical solution further includes that the top of the contact rod is provided with a contact element, and the contact rod is also provided with a connecting part, and the connecting part is also provided with a clamping element that can be flipped.

[0013] The above technical solution further includes that a folding groove is provided on the box body near the two sets of storage slots, and a handle is provided in the folding groove that can be folded.

[0014] The above technical solution further includes that two sets of first magnetic blocks are also respectively engaged in the folding groove, and a second magnetic block is also provided on the side of the handle near the folding groove, with the first magnetic block and the second magnetic block in contact.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. A megohmmeter, by applying its rated voltage, accurately measures the insulation resistance of a circuit, directly reflecting the electrical isolation performance of the insulation layer and determining the presence of leakage risk. A thermal imager, on the other hand, uses infrared thermal imaging technology to capture the temperature distribution on the circuit surface. When insulation aging or damage causes localized increases in resistance, abnormal heating will occur in the circuit, which the thermal imager can visualize as a visual image. Working together, the megohmmeter enables quantitative detection of insulation performance, while the thermal imager provides qualitative analysis of potential hazards. By inspecting fire protection electrical circuits from different dimensions—electrical parameter measurement and physical condition monitoring—the comprehensiveness and accuracy of the inspection are improved.

[0017] 2. The internal enclosure features limiting components and mounting plates, allowing for the detachable installation of equipment such as megohmmeters and thermal imagers, facilitating equipment replacement and maintenance. A ring-shaped storage component within the storage slot, combined with a torsion spring, automatically stores wires, preventing tangling. The contact rod is equipped with gripping and clamping mechanisms for stable operation. A folding slot, along with a magnetic handle, facilitates easy movement of the device and allows for folding and storage when not in use, saving space and enhancing the convenience of testing operations and the portability of the device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the assembled structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the internal structure of the assembled version of this utility model.

[0020] Figure 3 This is a schematic diagram of the structure of the box after assembly and opening of this utility model.

[0021] Figure 4 This is a schematic diagram of the exploded casing after assembly of this utility model.

[0022] Figure 5 yes Figure 4 A magnified structural diagram of region a in the middle.

[0023] Figure 6 yes Figure 4 A magnified structural diagram of region b in the middle.

[0024] Figure 7 This is a structural schematic diagram of the box body of this utility model.

[0025] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0026] 1. Enclosure; 2. Megohmmeter; 3. Thermal imager; 4. Battery; 5. Contact rod; 101. Mounting plate; 102. Switch; 103. Wiring component; 104. Storage slot; 105. Plug; 201. Enclosure cover; 202. First connector; 203. Second connector; 301. Lock; 302. Buckle plate; 401. Buffer pad; 501. Inspection port; 502. Removal plate; 601. Circular storage component; 602. Torsion spring; 701. Grip part; 702. Grip; 801. Contact component; 802. Clamping component; 901. Handle; 1001. First magnet; 1002. Second magnet. Detailed Implementation

[0027] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the technical solution of this utility model, but should not be used to limit the scope of protection of this utility model. Example:

[0028] like Figures 1 to 7 As shown, this utility model provides a fire-fighting electrical circuit insulation testing device, including a megohmmeter 2, a thermal imager 3, and a hollow housing 1. Multiple sets of limiting members are installed inside the housing 1, and a detachable mounting plate 101 is installed within each limiting member. Two sets of mounting slots are respectively opened on the mounting plate 101, and the megohmmeter 2 and thermal imager 3 are respectively installed in the two sets of mounting slots. A switch 102 is also installed on the mounting plate 101 between the megohmmeter 2 and the thermal imager 3, and the switch 102 is connected to the megohmmeter 2. A battery 4 and a wiring component 103 are installed inside the housing 1 near the bottom of the mounting plate 101. The battery 4 is connected to the switch 102 and the wiring component 103 respectively. Two sets of storage slots 104 are also provided on one side of the housing 1. Contact rods 5 are installed in both sets of storage slots 104, and plugs 105 are connected to the bottom of both sets of contact rods 5 via wires. The two sets of plugs 105 pass through the two sets of storage slots 104 and connect to the wiring component 103 inside the housing 1. By installing limiting components and mounting plate 101 inside the housing 1, the megohmmeter 2 and thermal imager 3 are respectively fixed in two sets of mounting slots on the mounting plate 101. This allows the megohmmeter 2 and thermal imager 3 to be in the same operating space, eliminating the need for inspectors to carry multiple separate devices, thus reducing the number and weight of equipment. When inspecting fire protection electrical circuits, operators only need to carry this integrated device to use the megohmmeter 2 to measure the insulation resistance of the circuit and the thermal imager 3 to detect temperature anomalies, evaluating the circuit status from different dimensions and improving inspection efficiency and comprehensiveness. Furthermore, the removable mounting plate 101 facilitates equipment maintenance and replacement. If the megohmmeter 2 or thermal imager 3 malfunctions, the mounting plate 101 can be directly removed from the limiting components for repair or replacement.

[0029] The megohmmeter 2 measures the insulation resistance of the line by applying voltage to obtain electrical parameters, directly determining the insulation layer's isolation performance and identifying leakage risk. The thermal imager 3 uses infrared imaging to capture the temperature distribution of the line, presenting the increased local resistance caused by insulation aging and damage as an abnormal temperature image. The combination of these two methods allows for the identification of potential hazards in fire-fighting electrical circuits from two dimensions: quantitative testing of electrical performance and visual monitoring of physical conditions, improving the accuracy and comprehensiveness of detection. The megohmmeter 2 can be the GM3123 model; the thermal imager 3 can be the TIX501 model.

[0030] A battery 4 and wiring harness 103 are installed inside the housing 1 near the bottom of the mounting plate 101, forming a centralized power supply system. The battery 4 provides power to the entire device, and the power supply to the megohmmeter 2 is controlled by the switch 102 to achieve power management. The bottom ends of the two sets of contact rods 5 are connected to the plug 105 via wires. The plug 105 passes through the storage slot 104 and connects to the wiring harness 103 inside the housing 1, forming a complete detection circuit connection system. This concentrates the power supply and detection circuits inside the housing 1, eliminating the need to find an external power source during testing. This avoids safety hazards and operational inconveniences caused by unstable external power sources or complex connections, ensuring a safe and efficient testing process. At the same time, it makes the overall structure of the device compact, reducing the exposure of wiring and lowering the risk of wiring damage.

[0031] Two sets of storage slots 104 are provided on one side of the housing 1, specifically for storing the contact rod 5. When not in use, the contact rod 5 can be completely retracted into the storage slots 104, preventing damage from impacts during transport. Simultaneously, the wire connected to the bottom of the contact rod 5 can be stored in the storage slots 104 via the plug 105, preventing the wire from becoming tangled or pulled by external objects during storage and keeping the housing 1 neat. This makes the entire device compact when stored, easy to carry and move, allowing testing personnel to easily transport it to different testing locations. Furthermore, the storage slots 104 reduce the risk of damage to the testing equipment due to loose placement, extend the service life of components such as the contact rod 5 and the wire, and reduce equipment maintenance costs.

[0032] like Figure 1 and Figure 3As shown, the box body 1 is also equipped with a box cover 201. On the side of the box cover 201 corresponding to the box body 1, a first connecting member 202 and a second connecting member 203 are respectively provided. The first connecting member 202 is rotatably disposed within the second connecting member 203, and the first connecting member 202 and the second connecting member 203 are fixed by a pivot pin. On the other side of the box body 1 away from the second connecting member 203, two sets of latches 301 are also provided opposite each other. On the same side of the box cover 201, corresponding to the two sets of latches 301, two sets of latch plates 302 are provided, and the two sets of latches 301 are respectively connected to the two sets of latch plates 302. The box cover 201 is connected to the box body 1 through the first connecting member 202, the second connecting member 203, and the pivot pin. The first connecting member 202 can be rotatably disposed within the second connecting member 203, allowing the box cover 201 to rotate around the pivot pin to achieve the opening and closing action. When opened, the device is easily accessible, including the megohmmeter 2 and thermal imager 3 inside the box. When closed, the two sets of latches 301 on the box body 1 are connected to the corresponding two sets of latches 302 on the box cover 201, which securely fixes the box cover 201 to the box body 1, preventing the box cover 201 from being accidentally opened during transportation and storage.

[0033] After the lid 201 is closed and secured by the latches 301 and the latch plate 302, a closed space is formed, enclosing the megohmmeter 2, thermal imager 3, battery 4, and other equipment inside the enclosure 1. This prevents external dust and moisture from entering the enclosure 1, reducing the impact of dust accumulation on equipment performance, preventing short circuits or component corrosion caused by moisture, protecting the normal operation of the equipment, and extending its service life. Simultaneously, with the lid 201 closed and secured, the entire device forms a neat structure, facilitating stacking and saving storage space. During handling, the connection between the latches 301 and the latch plate 302 ensures that the lid 201 will not loosen, preventing the internal equipment from shaking, shifting, or even sliding out of the enclosure 1 and causing damage, thus ensuring the safety and stability of the device during transportation.

[0034] like Figures 2 to 3 As shown, a sponge cushioning pad 401 is provided at the end of the cover 201 near the enclosure 1; an inspection port 501 is provided on one side of the enclosure 1, and mounting grooves are provided on two opposite sides of the inspection port 501. A set of disassembly plates 502 are detachably inserted into the two sets of mounting grooves. When the cover 201 is closed, the cushioning pad 401 is positioned between the cover 201 and the enclosure 1, forming a soft contact. When the cover 201 is closed, the cushioning pad 401 absorbs the impact force between the cover 201 and the enclosure 1, preventing damage to equipment such as the megohmmeter 2 and the thermal imager 3 due to the impact of the cover 201 closing. Simultaneously, the cushioning pad 401 fills gaps, enhancing the enclosure 1's airtightness and reducing the entry of dust and moisture into the enclosure 1.

[0035] An inspection port 501 is provided on one side of the enclosure 1, and disassembly plates 502 are installed in the mounting grooves on both sides. When it is necessary to inspect the battery 4, wiring components 103, and other equipment inside the enclosure 1, the disassembly plate 502 can be pulled out directly to expose the inspection port 501. The internal equipment status can be observed and simple maintenance operations (such as charging the battery 4) can be performed without fully opening the enclosure cover 201. After the inspection and maintenance are completed, the disassembly plate 502 is inserted along the mounting groove to close the inspection port 501, maintain the airtightness of the enclosure 1, and prevent the external environment from affecting the internal equipment.

[0036] like Figure 4 , Figure 5 and Figure 7 As shown, a mounting post is also provided inside the storage slot 104. A ring-shaped storage component 601 is rotatably mounted on the mounting post, and the wire is wound around the ring-shaped storage component 601. A torsion spring 602 is sleeved on the mounting post, and the torsion spring 602 contacts the inner surface of the ring-shaped storage component 601. The ring-shaped storage component 601 on the mounting post inside the storage slot 104 is rotatable, and the wire is wound around it. When the contact rod 5 is not used, the torsion spring 602 acts on the inner surface of the ring-shaped storage component 601, providing rotational rebound force, causing the ring-shaped storage component 601 to rotate automatically, winding and storing the wire. This prevents the wire from being loosely scattered inside the storage slot 104, prevents the wire from tangling and knotting, and keeps the inside of the storage slot 104 neat. When the contact rod 5 is used, pulling the contact rod 5 outward releases the tension on the wire from the ring-shaped storage component 601, and compresses the torsion spring 602. After use, releasing the contact rod 5 causes the torsion spring 602 to recover its deformation and generate a rebound force, driving the annular storage component 601 to rotate and rewind and store excess wires. This eliminates the need for manual wire handling, reducing wire handling time and improving testing preparation and storage efficiency.

[0037] The annular storage component 601 has multiple sets of locking pin holes in its center. Inserting the locking pins restricts the rotation of the annular storage component 601, keeping the wire wound around it in a fixed state and preventing the wire from automatically retracting due to the rebound force of the torsion spring 602 during testing. During testing, removing the locking pins from the pin holes releases the restriction on the annular storage component 601, allowing it to rotate freely. This allows operators to pull out the appropriate length of wire according to testing requirements. After testing, the locking pins are reinserted to secure the annular storage component 601 and prevent accidental wire retraction. An isolation component made of soft rubber is also provided inside the storage slot 104. This isolation component isolates the internal and external environments of the storage slot 104, ensuring the secure storage of the components within the slot and guaranteeing their stable use.

[0038] like Figures 4 to 5As shown, a gripping part 701 is provided on the outer surface of the contact rod 5, and a rubber gripping element 702 is also fitted on the gripping part 701; a contact element 801 is also provided on the top of the contact rod 5, and a connecting part is also provided on the contact rod 5, on which a clamping element 802 is provided that can be flipped; the gripping part 701 on the outer surface of the contact rod 5, fitted with the rubber gripping element 702, increases the friction between the hand and the contact rod 5. During testing, the operator grips the contact rod 5, and the rubber material is non-slip, preventing the contact rod 5 from slipping from the hand and ensuring stable operation. The rubber insulation performance prevents current from being conducted to the hand through the contact rod 5 during testing, avoiding the risk of electric shock and ensuring the personal safety of the operator; the contact element 801 on the top of the contact rod 5 is used for direct contact with the fire protection electrical circuit for insulation resistance measurement or temperature detection. The connecting part is equipped with a flip-up clamping component 802. During testing, the clamping component 802 is flipped open and clamped onto the line to fix the relative position of the contact rod 5 and the line, preventing loose contact between the contact component 801 and the line from affecting the accuracy of the test data. After testing, the clamping component 802 is flipped back to fit the contact rod 5, reducing space occupation and facilitating storage.

[0039] like Figure 4 , Figure 6 and Figure 7 As shown, a folding groove is also provided on the box 1 near the two sets of storage slots 104. A handle 901 is folded within the folding groove. Two sets of first magnetic blocks 1001 are also positioned opposite each other within the folding groove. A second magnetic block 1002 is also provided on the side of the handle 901 near the folding groove, with the first magnetic block 1001 and the second magnetic block 1002 in contact. The box 1 has a folding groove, allowing the handle 901 to be folded and stored within it. When the device needs to be moved, the handle 901 is unfolded from the folding groove, providing a gripping position for the operator to easily lift or pull the box 1. After use, the handle 901 is folded back into the folding groove, making it flush with the surface of the box 1, reducing the overall space occupied by the device and facilitating stacking during storage and transportation. The two sets of first magnetic blocks 1001 within the folding groove and the second magnetic block 1002 on the handle 901 attract each other. After the handle 901 is folded back into its original position, the first magnet 1001 and the second magnet 1002 come into contact and generate a magnetic force, firmly attaching the handle 901 to the folding groove. This prevents the handle 901 from unfolding on its own due to shaking or collision during the handling or movement of the device. This ensures that the handle 901 is stable in its retracted state and prevents it from accidentally extending and causing the device to become unstable or scratching other objects.

[0040] The above description is merely an embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fire-fighting electrical line insulation detection device, comprising a megohmmeter (2), a thermal imager (3) and a hollow-structured box (1), characterized in that: The housing (1) is provided with multiple sets of limiting members, and a mounting plate (101) is detachably provided in each limiting member. Two sets of mounting slots are respectively opened on the mounting plate (101). The megohmmeter (2) and the thermal imager (3) are respectively installed in the two sets of mounting slots. A switch (102) is also provided on the mounting plate (101) between the megohmmeter (2) and the thermal imager (3). The switch (102) is connected to the megohmmeter (2). The housing (1) near the bottom of the mounting plate (101) is... The enclosure (1) is equipped with a battery (4) and a connector (103). The battery (4) is connected to the switch (102) and the connector (103) respectively. Two sets of storage slots (104) are also provided on one side of the enclosure (1). Each set of storage slots (104) is equipped with a contact rod (5). The bottom of each set of contact rods (5) is connected to a plug (105) through a wire. The plugs (105) pass through the two sets of storage slots (104) and are connected to the connector (103) in the enclosure (1).

2. The electrical line insulation detection device for fire protection according to claim 1, characterized in that: The box body (1) is also provided with a box cover (201). The box cover (201) is provided with a first connector (202) and a second connector (203) on the side corresponding to the box body (1). The first connector (202) is rotatably disposed inside the second connector (203), and the first connector (202) and the second connector (203) are fixed by a pivot pin.

3. The electrical line insulation detection device for fire protection according to claim 2, characterized in that: On the other side of the box body (1) away from the second connector (203), there are two sets of latches (301). On the same side of the box cover (201), there are two sets of buckle plates (302) corresponding to the two sets of latches (301). The two sets of latches (301) are respectively connected to the two sets of buckle plates (302).

4. The electrical line insulation detection device for fire protection according to claim 3, characterized in that: The lid (201) near the box body (1) is also provided with a sponge cushioning pad (401).

5. A fire electrical line insulation detection device according to claim 4, characterized in that: The box (1) is also provided with an inspection port (501) on one side, and an installation groove is provided on the two opposite sides of the inspection port (501). The same set of disassembly plates (502) are detachably inserted in the two sets of installation grooves.

6. The fire protection electrical circuit insulation testing device according to claim 1, characterized in that: The storage slot (104) is also provided with a mounting post, and an annular storage component (601) is rotatably provided on the mounting post. The wire is wound around the annular storage component (601). A torsion spring (602) is sleeved on the mounting post, and the torsion spring (602) contacts the inner side of the annular storage component (601).

7. The fire protection electrical circuit insulation testing device according to claim 1, characterized in that: The outer side of the contact rod (5) is provided with a gripping part (701), and a rubber gripping part (702) is also sleeved on the gripping part (701).

8. The fire protection electrical circuit insulation testing device according to claim 7, characterized in that: The top of the contact rod (5) is also provided with a contact element (801), and the contact rod (5) is also provided with a connecting part, and the connecting part is also provided with a clamping element (802) that can be flipped.

9. The fire protection electrical circuit insulation testing device according to claim 1, characterized in that: A folding groove is also provided on the box body (1) near the two sets of storage slots (104), and a handle (901) is provided in the folding groove.

10. The fire protection electrical circuit insulation testing device according to claim 9, characterized in that: Two sets of first magnetic blocks (1001) are also respectively installed in the folding groove. A second magnetic block (1002) is also provided on the side of the handle (901) near the folding groove. The first magnetic block (1001) and the second magnetic block (1002) are in contact.

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