Fire leakage sensor

Abstract

According to the fire leakage sensor provided by the utility model, the fire leakage sensor can be directly connected with the low-voltage outgoing line unit through the wiring copper bar by arranging the wiring copper bar, so that the construction difficulty and cost are reduced, and the field construction efficiency is greatly improved. The fire leakage sensor is used for being matched with a to-be-detected low-voltage outgoing cable, and the low-voltage outgoing cable is integrated with a plurality of sub-cables; the fire leakage sensor comprises an accommodating device and a plurality of electric connecting pieces, each electric connecting piece is provided with a first electric connecting end and a second electric connecting end, and the first electric connecting end extends out of one side of the accommodating device so as to be connected with the sub-cable; and the second electric connection end extends out of the other side of the accommodating device so as to be connected with a low-voltage outgoing line unit.

Description

Technical Field

[0001] The utility model relates to the technical field of leakage detection devices, in particular to a fire leakage sensor. Background Art

[0002] In the power system, the low-voltage cabinet is a key device for power distribution and control. Its safety and stability are crucial to the operation of the entire power system. Among them, the timely detection and prevention of fire leakage signals is an important part of ensuring the safe operation of the low-voltage cabinet.

[0003] At present, the detection of fire leakage signals in low-voltage cabinets is mainly achieved by installing a circular fire leakage sensor at the rear of the low-voltage outlet unit. However, with the continuous advancement of power technology and the widespread promotion of intelligent small low-voltage cabinets, traditional fire leakage signal detection solutions face many challenges.

[0004] Specifically, as the size of low-voltage cabinets continues to shrink, the installation space of the low-voltage outlet unit installed in the low-voltage cabinet has become increasingly limited. This space limitation makes it extremely difficult to install a circular fire leakage sensor at the rear of the low-voltage outlet unit. When installing on-site, construction workers not only face the problem of narrow operating space, but also need to consider how to ensure the accurate installation and stable operation of the fire leakage sensor; this not only increases the difficulty of construction, but also invisibly increases work costs and may slow down work efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide a fire leakage sensor, which can be directly connected to the low-voltage outlet unit through the wiring copper busbar by setting a wiring copper busbar, thereby reducing the construction difficulty and cost and greatly improving the on-site construction efficiency.

[0006] To achieve the above-mentioned purpose, the utility model provides a fire leakage sensor, which is adapted to a low-voltage outlet cable to be detected, wherein the low-voltage outlet cable is integrated with a plurality of sub-cables; the fire leakage sensor includes a accommodating device and a plurality of electrical connectors, each of the electrical connectors having a first electrical connection end and a second electrical connection end, the first electrical connection end extending from one side of the accommodating device to be connected to the sub-cable; the second electrical connection end extending from the other side of the accommodating device to be connected to the low-voltage outlet unit.

[0007] By adopting the method of the present application, the low-voltage outgoing cable is split into phases before being connected to the fire leakage sensor, and each sub-cable is electrically connected to the first electrical connection end of the corresponding wiring copper bar; the fire leakage sensor is then directly electrically connected to the low-voltage outgoing unit of the low-voltage cabinet through the second electrical connection end of the corresponding wiring copper bar; this changes the operation in the traditional technical solution where the low-voltage outgoing cable needs to be split into phases between the fire leakage sensor and the low-voltage outgoing unit of the low-voltage cabinet, without being restricted by the narrow space between the low-voltage outgoing unit and the fire leakage sensor, reducing the on-site construction difficulty and improving the construction efficiency.

[0008] Optionally, the electrical connector is a wiring copper bar, each of the wiring copper bars has a plate-like structure, one end of the wiring copper bar serves as the first electrical connection end, and the other end of the wiring copper bar serves as the second electrical connection end.

[0009] Optionally, a leakage detection and identification component is further provided in the accommodating device, and the leakage detection and identification component is used to form electromagnetic induction with each of the wiring copper bars to test whether each sub-cable is leaking electricity.

[0010] Optionally, the accommodating device is an integral structure formed by potting, and the accommodating device is epoxy resin.

[0011] Optionally, the accommodating device includes a main body portion and a protective tube portion protruding from the main body portion, the protective tube portion wraps part of the electrical connector, and the first electrical connection end and the second electrical connection end extend out from the corresponding protective tube portion.

[0012] Optionally, the protective tube portions on the same side of the main body portion are spaced apart, and a corrugated umbrella skirt structure is provided on the outer side of the protective tube portion.

[0013] Optionally, the main body portion has a cuboid structure, the cuboid structure has a rectangular cross-section, the rectangular cross-section has two long sides and a short side connecting between the two long sides; each of the wiring copper bars is parallel to the plane where the long sides are located, and each of the wiring copper bars is located in the same plane.

[0014] Optionally, a fire signal lead-out terminal is further included, and the fire signal lead-out terminal is connected to the leakage detection and identification component; the fire signal lead-out terminal is provided on the side of the accommodating device away from the low-voltage outgoing unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings incorporated in the specification and constituting a part of the specification illustrate embodiments of the present specification and, together with the description, are used to explain the principles of the present specification.

[0016] Figure 1 is a front view of a structure of a fire leakage sensor in an embodiment of the present utility model;

[0017] Figure 2 It is the top view of another structure of the fire leakage sensor in the embodiment of the present utility model.

[0018] Figure 1 - Figure 2 In which:

[0019] 100. Fire leakage sensor;

[0020] 200. Accommodating device; 201. Main body part; 201a. Long side; 201b. Short side; 202. Protective tube part; 202a. Umbrella skirt structure;

[0021] 300. Wiring copper bar; 301. First electrical connection end; 302. Second electrical connection end; 300a. Connection hole;

[0022] 400. Fire signal lead-out terminal;

[0023] 500. Mounting bracket. Detailed implementation manner

[0024] The present utility model provides a fire leakage sensor 100. By providing a wiring copper bar 300, the fire leakage sensor 100 can be directly connected to the low-voltage outgoing unit through the wiring copper bar 300, thereby reducing the construction difficulty and cost and greatly improving the on-site construction efficiency.

[0025] In order to enable those skilled in the art to better understand the solution of the present utility model, the present utility model will be further described in detail below with reference to the drawings and specific implementation manners.

[0026] Relative terms such as "first" and "second" are only used to distinguish one component with the same name from another, and do not necessarily require or imply any such actual relationship or order between these components.

[0027] Please refer to Figures 1 to 2 , Figure 1 is the front view of one structure of the fire leakage sensor in the embodiment of the present utility model; Figure 2 is the top view of another structure of the fire leakage sensor in the embodiment of the present utility model.

[0028] In the current design of low-voltage switchgear, especially with the continuous reduction in the size of intelligent small low-voltage switchgear, the space between the low-voltage outgoing line unit and the fire leakage sensor has been extremely compressed. This is because in the traditional fire leakage signal detection scheme, before the low-voltage outgoing line cable is connected to the low-voltage outgoing line unit, it needs to be first connected to the fire leakage sensor. In this process, the low-voltage outgoing line cable needs to pass through the fire leakage sensor and, after passing through the fire leakage sensor, is split into three-phase cables and then respectively connected to the outgoing ends of the low-voltage outgoing line unit. However, in the new type of low-voltage switchgear, due to the significant compression of the space between the low-voltage outgoing line unit and the fire leakage sensor, this traditional operation process has become extremely difficult. First, after the low-voltage outgoing line cable extends out of the fire leakage sensor, due to the narrow space, it is difficult for construction personnel to accurately and efficiently split the cable. Second, during the process of splitting the low-voltage outgoing line cable and connecting it to the low-voltage outgoing line unit, due to space limitations, it is difficult for construction personnel to carry out effective cable management and wiring.

[0029] As shown in the figure, in order to solve at least one of the foregoing technical problems, the present utility model provides a fire leakage sensor 100, which is disposed between the low-voltage outgoing line cable and the low-voltage outgoing line unit of the low-voltage switchgear. The fire leakage sensor 100 is adapted to the low-voltage outgoing line cable to be detected, and the low-voltage outgoing line cable is integrated with a plurality of sub-cables. The fire leakage sensor 100 includes a receiving device 200, and the fire leakage sensor 100 further includes a plurality of electrical connectors, such as wiring copper bars 300, etc. Of course, it can also be an electrical connector made of other conductive materials, such as electrical transfer terminals, etc.

[0030] In this application, the wiring copper bar 300 is taken as an example for illustration. The middle part of the wiring copper bar 300 is located inside the receiving device 200. Each wiring copper bar 300 has a first electrical connection end 301 and a second electrical connection end 302. The first electrical connection end 301 extends out from one side of the receiving device 200 to be connected to the sub-cable, and the second electrical connection end 302 extends out from the other side inside the receiving device 200 to be connected to the low-voltage outgoing line unit.

[0031] Specifically, the wiring copper bar 300 is in a strip structure. The front end and the rear end in the length direction of the wiring copper bar 300 serve as the first electrical connection end 301 and the second electrical connection end 302 respectively. Connection holes 300a adapted to bolts are respectively opened at the front end and the rear end of the wiring copper bar 300. When connecting to the sub-cable, the first electrical connection end 301 is overlapped with the sub-cable, and then the first electrical connection end 301 and the sub-cable are fixedly connected by screwing with bolts. When connecting to the low-voltage outgoing line unit, after the second electrical connection end 302 is overlapped with the connection terminal of the low-voltage outgoing line unit first, the second electrical connection end 302 and the connection terminal of the low-voltage outgoing line unit are then fixedly connected by screwing with bolts. In this way, the electrical connection and fixation between the wiring copper bar 300, the sub-cable and the low-voltage outgoing line unit can be realized, and the disconnection among the three of them can be avoided.

[0032] The leakage detection and identification component is also accommodated in the accommodation device 200. The leakage detection and identification component is used to detect whether the low-voltage outgoing line cable leaks electricity. Specifically, the leakage detection and identification component and the low-voltage outgoing line cable realize leakage detection through the principle of electromagnetic induction. In this embodiment, an electromagnetic induction is formed between the leakage detection and identification component and each wiring copper bar 300, and whether each sub-cable leaks electricity is detected by sensing each wiring copper bar 300.

[0033] By adopting the method of the present application, the low-voltage outgoing line cable is phase-separated before being connected to the fire leakage sensor 100, and each sub-cable is respectively electrically connected to the first electrical connection end 301 of the corresponding wiring copper bar 300. The fire leakage sensor 100 is then directly electrically connected to the low-voltage outgoing line unit of the low-voltage cabinet through the second electrical connection end 302 of the corresponding wiring copper bar 300. Different from the traditional technical solution, in the traditional technical solution, a phase-separation operation needs to be carried out on the low-voltage outgoing line cable between the fire leakage sensor 100 and the low-voltage outgoing line unit of the low-voltage cabinet. The method of the present application is not limited by the narrow space between the low-voltage outgoing line unit and the fire leakage sensor 100, reduces the on-site construction difficulty, and improves the construction efficiency.

[0034] In some specific embodiments, the accommodation device 200 is an integral structure formed by potting, and the accommodation device 200 is made of epoxy resin. Each wiring copper bar 300 and the fire leakage sensing device (such as a sensing circuit board assembly) are potted into one body with epoxy resin. Epoxy resin is an insulating material, which can insulate between the wiring copper bar 300 and the sensing circuit board assembly. At the same time, the epoxy resin potting method can seal the wiring copper bar 300 and the sensing circuit board assembly, improving its waterproof and dustproof capabilities.

[0035] Optionally, the accommodating device 200 includes a main body 201 and a protective tube portion 202 protruding from the main body 201 , the protective tube portion 202 wraps a portion of the electrical connector, and the first electrical connection end 301 and the second electrical connection end 302 extend from the corresponding protective tube portion 202 . The main body 201 and the protective tube portion 202 are integrally formed by casting; the protective tube portion 202 is a tubular structure, and the protective tube portion 202 can match the number of the first electrical connection end and the second electrical connection end 302, that is, a plurality of protective tube portions 202 are arranged on the outside of the main body 201, and the protective tube portions 202 correspond to the first electrical connection end 301 one by one, and correspond to the second electrical connection end 302 one by one; the protective tube portion 202 located on one side of the main body 201 can also be an integral structure, and the protective tube portion 202 is a boss protruding from the main body 201, and the same side ends of the three wiring copper bars 300 are all extended from the same protective tube portion 202; by providing the protective tube portion 202, the part of the wiring copper bar 300 extending outside the main body 201 can be protected, the stress of the wiring copper bar 300 extending outside the main body 201 is reduced, and the structural strength of the wiring copper bar 300 is increased.

[0036] In a specific implementation, the number of the protective tube parts 202 located on one side of the main body 201 is three, the three protective tube parts 202 correspond to the three wiring copper bars 300, and the three protective tube parts 202 are arranged at intervals; a wavy umbrella skirt structure 202a is arranged on the outer side of the protective tube part 202, thereby increasing the creepage distance between the wiring copper bars 300 and improving the voltage tolerance strength of the fire leakage sensor 100.

[0037] In the above-mentioned embodiment, the main body 201 is approximately a rectangular parallelepiped structure, and the rectangular parallelepiped structure has a rectangular cross-section, which is cut along the plane where the height direction and the length direction of the fire leakage sensor 100 are located when the fire leakage sensor 100 is in normal use; Figure 2 As shown, the rectangular cross section has two long sides and a short side connected between the two long sides. Figure 2 The long side extends in the direction of the middle and long sides, and the long side is the length direction of the main body 201, and the short side is the Figure 2 The middle portion extends in the short side direction and is located in the height direction of the main body 201 .

[0038] The side edges of the rectangular parallelepiped structure are all provided with chamfers to form a cross-sectional shape similar to a runway; the copper busbars 300 are sequentially spaced along the long side, that is, the copper busbars 300 are arranged parallel to the long side; thus, in the low-voltage cabinet, the fire leakage sensor 100 only occupies a unidirectional space of the low-voltage cabinet, which changes the traditional circular fire leakage sensor 100 that needs to occupy a bidirectional space of the low-voltage cabinet;

[0039] Further, a wiring copper bar 300 is arranged inside the accommodating device 200, and the wiring copper bar 300 extends along the long side direction of the accommodating device 200, rather than being arranged perpendicular to the long side direction of the accommodating device 200; that is to say, as Figure 2 shown, the cross-section of the main body portion 201 is rectangular, and the rectangle has two long sides 201a and a short side 201b connecting the two long sides 201a; each wiring copper bar 300 is parallel to the plane where the long side 201a is located, and each wiring copper bar 300 is located in the same plane.

[0040] Thereby, the size of the accommodating device 200 in the short side direction can be further reduced, and the space occupied by the fire leakage sensor 100 in the height direction of the low-voltage switchgear can be further reduced; of course, the wiring copper bar 300 can also be arranged perpendicular to the long side direction, that is, extending along the short side direction. Even so, compared with the space occupied by the previous circular fire leakage sensor 100 in the height direction of the low-voltage switchgear, the space occupied by the fire leakage sensor 100 in the height direction of the low-voltage switchgear in this application is also significantly reduced.

[0041] In the foregoing embodiment, the fire leakage sensor 100 further includes a fire signal lead-out terminal 400, and the fire signal lead-out terminal 400 is connected to the leakage detection and identification component; the fire signal lead-out terminal 400 is arranged on the side of the accommodating device 200 away from the low-voltage outgoing line unit. The fire signal lead-out terminal 400 is connected with a bolt, and is connected to the fire alarm through the bolt, thereby improving the installation speed.

[0042] Optionally, an installation bracket 500 is further arranged inside the low-voltage switchgear, and the fire leakage sensor 100 is threadedly connected to the installation bracket 500.

[0043] By equipping the low-voltage switchgear with the fire leakage sensor 100 in this application, the size of the low-voltage switchgear can be further reduced, and at the same time, the installation steps of the fire leakage sensor 100 can be simplified, and the installation efficiency can be improved. The wiring copper bars 300 are also encapsulated together by pouring, so that the fire leakage sensor 100 has good insulation, dust-proof and waterproof performances.

[0044] The above has introduced the fire leakage sensor 100 provided by the present utility model in detail. Specific examples are used herein to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the core idea of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A fire leakage sensor, characterized in that: Used to match with the low-voltage outlet cable to be tested, wherein the low-voltage outlet cable is integrated with a plurality of sub-cables; The fire leakage sensor comprises a receiving device (200) and a plurality of electrical connectors, a portion of each of the electrical connectors being located within the receiving device (200), and each of the electrical connectors having a first electrical connection end (301) and a second electrical connection end (302), wherein the first electrical connection end (301) extends from one side of the receiving device (200) to be connected to the sub-cables in a one-to-one correspondence; and the second electrical connection end (302) extends from the other side of the receiving device (200) to be connected to a low-voltage outlet unit.

2. The fire leakage sensor according to claim 1, characterized in that: The electrical connection piece is a copper busbar (300), one end of the copper busbar (300) serves as the first electrical connection end (301), and the other end of the copper busbar (300) serves as the second electrical connection end (302).

3. The fire leakage sensor according to claim 2, characterized in that: The first electrical connection end (301) and the second electrical connection end (302) are both provided with connection holes (300a), and the connection holes (300a) are used to match with the bolt assembly.

4. The fire leakage sensor according to claim 2, characterized in that: A leakage detection and identification component is also provided in the accommodating device (200), and the leakage detection and identification component is used to form electromagnetic induction with each of the wiring copper bars (300) to test whether each of the sub-cables has leakage.

5. The fire leakage sensor according to claim 2, characterized in that: The accommodating device (200) comprises a main body (201) and a protective tube portion (202) protruding from the main body (201), part of the electrical connector being located within the protective tube portion (202), and the first electrical connection end (301) and the second electrical connection end (302) extending from the corresponding protective tube portion (202).

6. The fire leakage sensor according to claim 5, characterized in that: The main body (201) is a cuboid structure, the cuboid structure has a rectangular cross section, the rectangular cross section has two long sides (201a) and a short side (201b) connected between the two long sides (201a); Each of the copper wiring bars (300) is parallel to the plane where the long side (201a) is located, and each of the copper wiring bars (300) is located on the same plane.

7. The fire leakage sensor according to claim 5, characterized in that: The protective tube portions (202) located on the same side of the main body portion (201) are spaced apart, and an outer wall surface of the protective tube portion (202) is provided with an umbrella skirt structure (202a).

8. The fire leakage sensor according to claim 7, characterized in that: The outer surface of each umbrella skirt structure extends in a wave shape.

9. The fire leakage sensor according to any one of claims 1 to 8, characterized in that: The containing device (200) is an integrated structure formed by glue injection.

10. The fire leakage sensor according to any one of claims 1 to 8, characterized in that: It also comprises a fire signal lead-out terminal (400) and a leakage detection and identification component, wherein the fire signal lead-out terminal (400) is connected to the leakage detection and identification component.

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