Linear temperature-sensitive fire detection terminal

Abstract

The invention discloses a linear temperature-sensitive fire detection terminal, and relates to the technical field of fire-fighting detection. The device comprises a box body, wherein a heat dissipation copper seat and a standby battery are mounted in the box body; the heat dissipation copper seat is provided with a heat dissipation cavity and heat dissipation fins; a tubular iron core is sleeved with the heat dissipation cavity, and a plurality of heat conduction fins are connected between the inner wall of the heat dissipation cavity and the outer wall of the tubular iron core. The tubular iron core is wound with a coil connected in series with an electrified wire, a guide rod is sleeved in the tubular iron core, the guide rod is sleeved with a magnet, and two ends of the guide rod are connected with conductive bolts; when the electrified wire is disconnected, the coil loses a magnetic field, the guide rod is pushed through the spring, the normally-open switch is switched on through the conductive plug pin, and power is supplied to the temperature sensing grating through the standby battery. The tubular iron core is arranged in the heat dissipation cavity, heat is transmitted to the outside of the box body through the heat dissipation fins and the heat conduction fins, the cooling effect is achieved, and the problems that in the prior art, the internal temperature rises, the fire detector is prone to false alarm, and the detection accuracy is affected are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of fire detection, and in particular relates to a linear temperature sensing fire detection terminal. Background Art

[0002] Linear heat-sensing fire detectors are fire detectors that respond to the temperature parameters around a continuous line. They convert temperature value signals or temperature change signals per unit time into electrical signals to detect fires and output alarm signals.

[0003] Linear temperature-sensitive fire detectors monitor fire information through transmission wires. When the fire first melts the connecting cable between the fiber grating and the terminal, the detection terminal will fail and lose its alarm function.

[0004] For example, Chinese utility model CN214847030U discloses a temperature sensing element for a linear temperature-sensing fire detector. When the energized wire is accidentally disconnected, the magnetic field of the energized coil disappears, the first magnet is attracted by the second magnet, and the metal block is stuck in the switch. A closed circuit is formed between the backup power supply, the switch and the temperature-sensitive grating, so that the temperature-sensitive grating still has the function of sensing temperature changes nearby.

[0005] However, in the prior art, the energized coil is in a continuous working state, and long-term operation may easily cause the temperature inside the protection box to rise, causing the fire detector to give a false alarm, thereby affecting the overall fire detection accuracy. Summary of the invention

[0006] The purpose of the present invention is to provide a linear temperature-sensing fire detection terminal, which achieves a cooling effect by arranging a tubular iron core in a heat dissipation cavity and utilizing heat dissipation fins and thermal conductive fins to transfer heat to the outside of the box body, thereby solving the problem that the existing internal temperature rises, which easily causes false alarms in fire detectors and affects detection accuracy.

[0007] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0008] The present invention discloses a linear temperature-sensing fire detection terminal, comprising a box body, a heat dissipation copper seat and a backup battery are installed in the box body; the heat dissipation copper seat is provided with a heat dissipation cavity located inside the box body, and heat dissipation fins located outside the box body; the heat dissipation cavity is in a round tube structure, a tubular iron core is sleeved inside the heat dissipation cavity, and a plurality of heat-conducting fins are connected between the inner wall of the heat dissipation cavity and the outer wall of the tubular iron core; a coil connected in series with a current-carrying conductor is wound around the tubular iron core, a guide rod is sleeved inside the tubular iron core, a magnet is sleeved on the guide rod, and both ends are fixedly connected with conductive pins; a fixed side plate is provided in the box body, and the fixed side plate is connected with a spring that abuts against one end of the guide rod, so that when the current-carrying conductor is disconnected, the coil loses its magnetic field, the guide rod is pushed by the spring, and the normally open switch is conducted by the conductive pin, so as to realize powering the temperature-sensing grating by the backup battery.

[0009] As a preferred technical solution of the present invention, an annular groove is provided on the outer wall of the tubular core, and the coil is wound in the annular groove.

[0010] As a preferred technical solution of the present invention, the plurality of heat-conducting fins are arranged in a circumferential array along the inner wall of the heat dissipation cavity, and an interference fit is formed between the outer wall of the tubular iron core and the plurality of heat-conducting fins.

[0011] As a preferred technical solution of the present invention, the guide rod is a hollow tubular structure and is made of insulating material.

[0012] As a preferred technical solution of the present invention, the guide rod includes a guide section adapted to the inner wall of the tubular core, and a connecting section located at the connecting section of the guide section, and the diameter of the connecting section is smaller than the inner diameter of the tubular core.

[0013] As a preferred technical solution of the present invention, there are two magnets, which are respectively connected to the two ends of the guide rod, and the magnetic poles of the two magnets are arranged in the same direction and are both located inside the heat dissipation cavity.

[0014] As a preferred technical solution of the present invention, a heat dissipation fan is also included. The heat dissipation fan corresponds to the position of the heat dissipation fins and is used to perform air cooling on the heat dissipation fins.

[0015] As a preferred technical solution of the present invention, two heat-conducting seats are fixedly connected to the outer wall of the heat dissipation cavity, and the two heat-conducting seats are connected to heat-deformable plates, and the two heat-deformable plates are connected in series with the heat dissipation fan in the circuit. When the temperature of the heat dissipation cavity is too high, the two heat-deformable plates are deformed and contact each other, so that the circuit is turned on, thereby starting the heat dissipation fan.

[0016] As a preferred technical solution of the present invention, the normally open switch includes an insulating base, which is provided with a plug hole that is gap-matched with the conductive plug; two spring sheets are fixedly connected to the side of the insulating base away from the conductive plug, and both spring sheets are connected to clamping contacts, and the two clamping contacts are symmetrically arranged relative to the plug hole, and are used for inserting the conductive plug between the two clamping contacts so that the two clamping contacts are clamped on the surface of the conductive plug, and the two clamping contacts are conductive through the conductive plug.

[0017] As a preferred technical solution of the present invention, the end of the conductive pin is in a tapered structure.

[0018] The present invention has the following beneficial effects:

[0019] The present invention installs a heat dissipation copper seat on the box body, and provides a heat dissipation cavity located inside the box body and heat dissipation fins located outside the box body on the heat dissipation copper seat, and provides a tubular iron core in the heat dissipation cavity and connects it with the heat conducting fins, and utilizes the heat dissipation fins and the heat conducting fins to transfer the heat generated by the continuous operation of the coil to the outside of the box body, thereby achieving an overall cooling effect, effectively avoiding the temperature inside the box body from rising, which may easily cause the fire detector to have a false alarm, thereby effectively ensuring the overall fire detection accuracy.

[0020] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of a linear temperature sensing fire detection terminal of the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of the heat dissipation copper seat;

[0024] Figure 3 for Figure 2 A front view of

[0025] Figure 4 for Figure 3 Sectional view at CC;

[0026] Figure 5 for Figure 1 A magnified view of the structure of the middle A part;

[0027] Figure 6 for Figure 2 A magnified view of the structure of the middle B section;

[0028] Figure 7 for Figure 5 Schematic diagram of the structure when the middle coil is energized;

[0029] Figure 8 It is a schematic diagram of the structure of the tubular core and the guide rod;

[0030] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0031] 1-box body, 2-heat dissipation copper seat, 3-tubular iron core, 4-guide rod, 5-heat dissipation fan, 6-thermal conductive seat, 7-insulating base, 101-spare battery, 102-fixed side plate, 103-spring, 201-heat dissipation cavity, 202-heat dissipation fins, 203-thermal conductive fins, 301-coil, 401-magnet, 402-conductive pin, 403-guide section, 404-connecting section, 601-thermal deformation sheet, 701-spring sheet, 702-clamping contact. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0034] Embodiment 1

[0035] See also Figure 1 and 2 As shown, the present invention is a linear temperature sensing fire detection terminal, comprising a box body 1, in which a heat dissipation copper seat 2 and a backup battery 101 are installed. The heat dissipation copper seat 2 is provided with a heat dissipation cavity 201 located inside the box body 1, and heat dissipation fins 202 located outside the box body 1.

[0036] Specifically, the heat dissipation copper seat 2 has stepped surfaces around it, and the stepped surfaces are provided with connection holes. The bottom wall of the box body 1 is provided with a mounting opening. The stepped surfaces around the heat dissipation copper seat 2 are fitted with the lower surface of the box body 1 and fixed by screws. At this time, the upper surface of the heat dissipation copper seat 2 is located inside the box body 1, and the lower surface of the heat dissipation copper seat 2 is located outside the box body 1. The heat dissipation cavity 201 is located on the upper surface of the heat dissipation copper seat 2, and the heat dissipation fins 202 are evenly arranged on the lower surface of the heat dissipation copper seat 2. The heat dissipation cavity 201, the heat dissipation cavity 201 and the heat dissipation fins 202 are an integrated structure.

[0037] like Figure 3 and 4 As shown, the heat dissipation cavity 201 is a circular tube structure, a tubular iron core 3 is sleeved inside the heat dissipation cavity 201, and a plurality of heat-conducting fins 203 are connected between the inner wall of the heat dissipation cavity 201 and the outer wall of the tubular iron core 3. The plurality of heat-conducting fins 203 are arranged in an array along the circumference of the inner wall of the heat dissipation cavity 201, so that the plurality of heat-conducting fins 203 are distributed in a circle, the outer wall of the tubular iron core 3 is interference-fitted with the plurality of heat-conducting fins 203 on one side facing the center of the heat dissipation cavity 201, and the axial direction of the tubular iron core 3 is arranged horizontally.

[0038] like Figure 4 and 8 As shown, the tubular core 3 is wound with a coil 301 connected in series with a current-carrying conductor. Specifically, an annular groove is provided on the outer wall of the tubular core 3, and the coil 301 is wound in the annular groove, so that when the tubular core 3 is loaded into the heat dissipation cavity 201, there is no interference between the thermal fins 203 and the coil 301, so that the thermal fins 203 only contact the outer wall of the tubular core 3.

[0039] The tubular core 3 is provided with a guide rod 4, which is provided with a magnet 401, and both ends are fixedly connected to a conductive plug 402. The guide rod 4 is a hollow tubular structure made of insulating material, which is conducive to reducing the weight of the guide rod 4.

[0040] In addition, there are two magnets 401, which are connected to both ends of the guide rod 4, and the magnetic poles of the two magnets 401 are arranged in the same direction and are both located inside the heat dissipation cavity 201, so that the external magnetic field can be shielded by the heat dissipation cavity 201, thereby ensuring the stability of the magnetic field generated by the coil 301 being energized and the force between the two magnets 401. By providing two magnets 401, the magnetic field generated by the coil 301 being energized acts on the two magnets 401, thereby improving the pushing effect on the guide rod 4.

[0041] Meanwhile, the guide rod 4 includes a guide section 403 adapted to the inner wall of the tubular core 3, and a connecting section 404 located at the connecting section of the guide section 403, and the diameter of the connecting section 404 is smaller than the inner diameter of the tubular core 3. By only using the guide section 403 to cooperate with the tubular core 3, it is beneficial to reduce the resistance of the guide rod 4 during axial movement, and reducing the diameter of the connecting section 404 also further reduces the overall weight of the guide rod 4, which is beneficial to the pushing of the magnetic field on the guide rod 4.

[0042] like Figure 5 As shown, a fixed side plate 102 is provided in the box body 1, and the fixed side plate 102 is connected to the inner wall of the box body 1, or connected to the heat dissipation copper seat 2. The fixed side plate 102 is connected to a spring 103 that abuts against one end of the guide rod 4.

[0043] When the energized wire is disconnected, the coil 301 loses its magnetic field. At this time, the guide rod 4 is only acted upon by the spring 103. The spring 103 pushes the guide rod 4, and the conductive pin 402 is used to open the normally open switch, so that the backup battery 101 is used to power the temperature sensitive grating.

[0044] By setting the tubular iron core 3 in the heat dissipation cavity 201 and connecting it to the heat-conducting fins 203, the heat generated by the continuous operation of the coil 301 is transferred to the heat dissipation copper seat 2 through the heat-conducting fins 203 and the heat dissipation cavity 201, and then the heat is dissipated to the outside of the box body 1 through the heat dissipation fins 202, thereby achieving an overall cooling effect, effectively avoiding the temperature inside the box body 1 from rising, which may easily cause the fire detector to have a false alarm, thereby effectively ensuring the overall fire detection accuracy.

[0045] Embodiment 2

[0046] like Figures 1 to 3 As shown, on the basis of embodiment one, a cooling fan 5 is further included. The cooling fan 5 can be installed on the lower surface of the box body 1, or directly installed on the lower surface of the cooling copper seat 2. The cooling fan 5 corresponds to the position of the cooling fins 202, and is used to cool the cooling fins 202 by air, thereby further improving the overall cooling efficiency.

[0047] At the same time, two thermally conductive seats 6 are fixedly connected to the outer wall of the heat dissipation cavity 201, and the two thermally conductive seats 6 are both connected to thermal deformation plates 601, and the two thermal deformation plates 601 are connected in series with the heat dissipation fan 5 in the circuit. The heat dissipation fan 5 can be powered by a powered wire or by a backup battery 101.

[0048] When the coil 3 generates a large amount of heat, causing the temperature of the heat dissipation cavity 201 to be too high, the heat is transferred to the thermal deformation sheet 601 through the heat conductive seat 6, and the two thermal deformation sheets 601 are deformed by the heat. The two thermal deformation sheets 601 can be symmetrically arranged during installation, so that the two thermal deformation sheets 601 deform in opposite directions, thereby ensuring that the two thermal deformation sheets 601 can contact each other when the thermal deformation sheets 601 are deformed by the heat.

[0049] When the two thermally deformable sheets 601 contact each other, the circuit is turned on, so that the heat dissipation fan 5 is started to achieve rapid heat dissipation. The thermal deformation effect of the thermally deformable sheets 601 is utilized, so that the start-up of the heat dissipation fan 5 is more flexible and accurate.

[0050] Embodiment 3

[0051] like Figure 2 and 6 As shown, on the basis of the first or second embodiment, the normally open switch includes an insulating base 7, which can be installed on the bottom wall of the box body 1, or directly installed on the upper surface of the heat dissipation copper base 2, and corresponds one to one with the two conductive pins 402, and the insulating base 7 is provided with a pin hole that is gap-matched with the conductive pins 402.

[0052] like Figure 5 As shown, two spring sheets 701 are fixedly connected to one side of the insulating base 7 away from the conductive plug 402, and both spring sheets 701 are connected to a clamping contact 702, and the two clamping contacts 702 are symmetrically arranged relative to the plug hole, so that the conductive plug 402 is inserted between the two clamping contacts 702, so that the two clamping contacts 702 are clamped on the surface of the conductive plug 402, and the two clamping contacts 702 are conductive through the conductive plug 402.

[0053] like Figure 7 As shown, when the coil 301 is energized, under the action of the magnetic field, the guide rod 4 drives the conductive pin 402 to move toward the side away from the insulating base 7, so that the conductive pin 402 is separated from the two clamping contacts 702, so that the two clamping contacts 702 are disconnected.

[0054] After the guide rod 4 moves, the spring 103 is compressed, so that after power failure, the spring 103 resets and pushes the guide rod 4. Among them, the fixed side plate 102 can be directly installed on the side of the insulating base 7, or it can be an integrated structure with the insulating base 7, so as to facilitate the overall installation.

[0055] In addition, after one of the conductive pins 402 contacts with the two clamping contacts 702 on the corresponding insulating base 7, the positive pole of the backup battery 101 is turned on, and after the other conductive pin 402 contacts with the two clamping contacts 702 on the corresponding insulating base 7, the negative pole of the backup battery 101 is turned on, thereby making the circuit between the backup power supply 101 and the temperature-sensitive grating conductive, thereby supplying power to the temperature-sensitive grating.

[0056] At the same time, the end of the conductive pin 402 is in a tapered structure, and the tapered structure enables the conductive pin 402 to be more easily inserted between the two clamping contacts 702, thereby ensuring overall reliability and stability in use.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0058] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A linear temperature sensing fire detection terminal, characterized in that: It comprises a box body (1), in which a heat dissipation copper seat (2) and a backup battery (101) are installed; The heat dissipation copper seat (2) is provided with a heat dissipation cavity (201) located inside the box body (1), and heat dissipation fins (202) located outside the box body (1); the heat dissipation cavity (201) is in a round tube structure, a tubular iron core (3) is sleeved inside the heat dissipation cavity (201), and a plurality of heat-conducting fins (203) are connected between the inner wall of the heat dissipation cavity (201) and the outer wall of the tubular iron core (3); The tubular iron core (3) is wound with a coil (301) connected in series with a current-carrying wire, a guide rod (4) is sleeved inside the tubular iron core (3), a magnet (401) is sleeved on the guide rod (4), and both ends are fixedly connected to conductive pins (402); A fixed side plate (102) is arranged in the box body (1), and the fixed side plate (102) is connected to a spring (103) that abuts against one end of the guide rod (4). When the energized wire is disconnected, the coil (301) loses its magnetic field, the guide rod (4) is pushed by the spring (103), and the normally open switch is conducted by the conductive pin (402), so that the temperature-sensitive grating is powered by the backup battery (101).

2. A linear temperature sensing fire detection terminal according to claim 1, characterized in that: The outer wall of the tubular iron core (3) is provided with an annular recessed groove, and the coil (301) is wound in the annular recessed groove.

3. A linear temperature sensing fire detection terminal according to claim 2, characterized in that: The plurality of heat-conducting fins (203) are arranged in a circumferential array along the inner wall of the heat dissipation cavity (201), and an interference fit is formed between the outer wall of the tubular iron core (3) and the plurality of heat-conducting fins (203).

4. A linear temperature sensing fire detection terminal according to claim 1, characterized in that: The guide rod (4) is a hollow tubular structure and is made of insulating material.

5. A linear temperature sensing fire detection terminal according to claim 1 or 4, characterized in that: The guide rod (4) comprises a guide section (403) adapted to the inner wall of the tubular iron core (3), and a connecting section (404) located at the connecting section of the guide section (403), wherein the diameter of the connecting section (404) is smaller than the inner diameter of the tubular iron core (3).

6. A linear temperature sensing fire detection terminal according to claim 1 or 4, characterized in that: There are two magnets (401), which are respectively connected to the two ends of the guide rod (4), and the magnetic poles of the two magnets (401) are arranged in the same direction and are both located inside the heat dissipation cavity (201).

7. A linear temperature sensing fire detection terminal according to claim 1, characterized in that: It also includes a heat dissipation fan (5), which is located at a position corresponding to the heat dissipation fins (202) and is used to cool the heat dissipation fins (202) by air.

8. A linear temperature sensing fire detection terminal according to claim 8, characterized in that: The outer wall of the heat dissipation cavity (201) is fixedly connected to two heat-conducting seats (6), and the two heat-conducting seats (6) are both connected to heat-deformable sheets (601), and the two heat-deformable sheets (601) are connected in series with the heat dissipation fan (5) in a circuit, so that when the temperature of the heat dissipation cavity (201) is too high, the two heat-deformable sheets (601) are deformed and contact each other, so that the circuit is turned on, thereby starting the heat dissipation fan (5).

9. A linear temperature sensing fire detection terminal according to claim 1, characterized in that: The normally open switch comprises an insulating base (7), the insulating base (7) being provided with a pin hole which is gap-matched with the conductive pin (402); Two spring sheets (701) are fixedly connected to one side of the insulating base (7) away from the conductive plug (402), and the two spring sheets (701) are both connected to a clamping contact (702), and the two clamping contacts (702) are symmetrically arranged relative to the plug hole, and are used to insert the conductive plug (402) between the two clamping contacts (702), so that the two clamping contacts (702) are clamped on the surface of the conductive plug (402), and the two clamping contacts (702) are connected through the conductive plug (402).

10. A linear temperature sensing fire detection terminal according to claim 9, characterized in that: The end of the conductive pin (402) is in a tapered structure.

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