Power distribution box for indoor power distribution of building

Abstract

The utility model discloses a power distribution box for building indoor power distribution, a power-off protection switch is arranged in a box body, and whether a fire disaster exists in the power distribution box is detected through a temperature sensor and a smoke sensor which are connected with the power-off protection switch; and the electromagnet connected with the power-off protection switch controls the movement of the plugging piece so as to control the opening and closing of the ventilation hole. The distribution box is further integrated with a carbon dioxide fire extinguishing system, and in the moving process of blocking the ventilation hole by the blocking piece, a rotating valve of the carbon dioxide tank is started to enable carbon dioxide to enter the box body. According to the invention, automatic processes of power-off, plugging and fire extinguishing after fire detection are realized, the whole fire extinguishing process is completed after power-off, and further damage to the circuit is prevented on the premise of plugging the fire in the distribution box.

Description

Technical Field

[0001] The present application relates to the technical field of distribution boxes, and in particular to a distribution box for indoor power distribution in buildings. Background Art

[0002] The distribution box is small in size, easy to install and not restricted by the site. As an electrical device that distributes electric energy, fire prevention is an important safety performance requirement, especially for distribution boxes used indoors in buildings. It is necessary to prevent the fire from spreading outside the distribution box and causing greater harm in a timely manner. The existing distribution box fire prevention function usually starts the fire extinguishing operation by electrically controlling the corresponding equipment after the corresponding sensor detects it. However, in order to avoid the expansion of the fire and damage to the circuit, when a fire is detected in the distribution box, the power should be cut off first. The existing technology lacks a distribution box that can perform the fire extinguishing function after the power is cut off. Utility Model Content

[0003] In order to solve the problems raised in the background technology, the purpose of this application is to provide a distribution box for indoor power distribution in a building.

[0004] The distribution box for indoor power distribution in buildings provided in the present application adopts the following technical scheme: a distribution box for indoor power distribution in buildings, including a box body, a power-off protection switch is arranged in the box body, the power-off protection switch is connected to a smoke sensor and a temperature sensor, the power-off protection switch is also connected to an electromagnet, a ventilation hole is opened on one side of the box body, a sealing piece is movably connected to the inner side surface of the box body, a ferromagnetic metal block is arranged at the position of the sealing piece corresponding to the electromagnet, and the sealing piece is also provided with a connecting piece connected to the box body, after the electromagnet is powered off, the sealing piece moves along the inner side surface of the box body to the position of blocking the ventilation hole under the action of the connecting piece.

[0005] Preferably, the connecting member is a spring.

[0006] Preferably, a slideway is provided on the inner side of the box body, and the blocking member is provided with a sliding block that cooperates with the slideway.

[0007] Preferably, the number of the ventilation hole is at least one, and the number of the blocking members and the electromagnets matches the number of the ventilation holes.

[0008] Preferably, it also includes a carbon dioxide tank with a rotating valve, a connecting rod and a driven gear are rotatably connected in the box body, the connecting rod is provided with a connecting gear that rotates coaxially with the connecting rod, the rotating valve of the carbon dioxide tank is coaxially connected to the driven gear, the driven gear is meshingly connected to the connecting gear, and one side of the sealing member is provided with a tooth pattern that meshes with the connecting gear.

[0009] Preferably, the connecting gear comprises a first gear and a second gear, the first gear is meshingly connected with the teeth of the blocking member, and the second gear is meshingly connected with the driven gear.

[0010] Preferably, a safety lock assembly is also provided between the second gear and the driven gear, the safety lock assembly includes a safety gear meshingly connected to the second gear and the driven gear, an operating rod is connected to the safety gear coaxially, a safety base with a notch and a hollow interior is provided at a position corresponding to the end face of one end of the operating rod in the box body, one end of the operating rod extends to the safety base, and the other end of the operating rod extends outside the box body, and a locking baffle matching the notch of the safety base is provided at the end of the operating rod corresponding to the safety base, and the operating rod is pressed axially to cause the locking baffle to extend into the safety base and drive the safety gear to disengage from the meshing state with the second gear and the driven gear.

[0011] Preferably, a return spring is provided between the safety base and the safety gear.

[0012] In summary, the present application includes at least one of the following beneficial technical effects:

[0013] By setting an electromagnet to pull the blocking piece, when the temperature sensor or smoke sensor senses a fire in the distribution box, the power-off protection switch immediately cuts off the power. After the power is cut off, the electromagnet loses its magnetic force, and under the action of the spring, the blocking piece is pushed to the position of blocking the vent, preventing oxygen from entering and preventing flames or smoke from escaping from the vent;

[0014] A carbon dioxide tank matched with the plugging piece is provided. When the plugging piece is pushed and moved by the spring, the tooth pattern on one side of the plugging piece drives the connecting gear to rotate, and the connecting gear rotates to drive the driven gear to rotate. After the driven gear rotates, the rotating valve of the carbon dioxide tank is opened, so that the carbon dioxide enters the distribution box to assist in fire extinguishing;

[0015] A safety gear is set, and when the distribution box is finished, the safety gear is operated to disengage it from the meshing state with the driven gear. At this time, after the power is cut off, the blocking piece will block the vent under the push of the spring, but the carbon dioxide tank will not be opened, so that before the distribution box is moved to a new position and restarted, the blocking piece can prevent external dust from entering from the vent. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the box structure of an embodiment of the utility model;

[0017] Figure 2 This is a schematic diagram of the bottom structure of an embodiment of the utility model;

[0018] Figure 3 It is a schematic structural diagram of a safety lock assembly according to an embodiment of the utility model.

[0019] Description of reference numerals:

[0020] 1. Box body; 2. Electromagnet; 3. Ventilation hole; 4. Sealing piece; 5. Connecting piece; 6. Carbon dioxide tank; 7. Connecting rod; 8. Driven gear; 9. Connecting gear; 901. First gear; 902. Second gear; 10. Safety lock assembly; 101. Safety gear; 102. Operating rod; 103. Safety base; 104. Locking baffle. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present utility model.

[0022] The following is combined with Figure 1-Figure 3 The present application is further described in detail. The embodiment of the present application discloses a distribution box for indoor power distribution in a building, including a box body 1, a power-off protection switch is provided in the box body 1, and the power-off protection switch is connected to a smoke sensor and a temperature sensor. The power-off protection switch is also connected to an electromagnet 2, and a ventilation hole 3 is provided on one side of the box body 1 for ventilation and heat dissipation. A blocking piece 4 is movably connected to the inner side of the box body 1, and the material of the blocking piece 4 is selected according to the actual conditions. A ferromagnetic metal block is provided at the position of the blocking piece 4 corresponding to the electromagnet 2, and the ferromagnetic metal block is usually iron. After the electromagnet 2 is energized, it attracts the ferromagnetic metal block under the action of magnetic force and then pulls the blocking piece 4 and makes the blocking piece 4 out of the position of blocking the ventilation hole 3. The blocking piece 4 is also provided with a connecting piece 5 connected to the box body 1, specifically, the connecting piece 5 is a spring, and the cooperation with the electromagnet 2 is realized by using the function of resetting after being stretched or compressed. After the electromagnet 2 is powered off, the blocking piece 4 moves along the inner side of the box body 1 to the position of blocking the ventilation hole 3 under the action of the connecting piece 5. The method of connecting the box body 1 and the blocking member 4 with the spring as the connecting member 5 includes two methods: in the initial state, the spring pushes the blocking member 4 to the position of blocking the ventilation hole 3, and the spring pulls the blocking member 4 to the position of the ventilation hole 3. In this embodiment, the connection method in which the spring pushes the blocking member 4 to the position of blocking the ventilation hole 3 is shown. Figure 2 As shown, in the initial state, the spring pushes the blocking member 4 to block the ventilation hole 3. When the electromagnet 2 is powered on, the electromagnet 2 attracts the ferromagnetic metal block, which drives the blocking member 4 to move toward the electromagnet 2 and causes the blocking member 4 to leave the position of blocking the ventilation hole 3. At this time, the spring is squeezed. When the electromagnet 2 is powered off, the elastic force of the spring is released to push the blocking member 4 to the position of blocking the ventilation hole 3.

[0023] A slideway is provided on the inner side of the box body 1, and the blocking member 4 is provided with a slider matched with the slideway, so as to enable the blocking member 4 to move back and forth stably and prevent dislocation.

[0024] There is at least one ventilation hole 3, and the number of blocking pieces 4 and electromagnets 2 matches the number of ventilation holes 3. More ventilation holes 3 and corresponding electromagnets 2 and blocking pieces 4 can be provided according to the size of the box 1 or the heat dissipation requirements.

[0025] The present application also includes a carbon dioxide tank 6 with a rotating valve, a connecting rod 7 and a driven gear 8 are rotatably connected in the housing 1, the connecting rod 7 is provided with a connecting gear 9 coaxially rotating with the connecting rod 7, and the rotating valve of the carbon dioxide tank 6 is connected to the driven gear 8. Specifically, the embodiment of the present application shows that an insertion hole is coaxially provided in the driven gear 8, and the rotating valve of the carbon dioxide tank 6 is axially inserted into the insertion hole of the driven gear 8 to realize the connection between the carbon dioxide tank 6 and the driven gear 8. The driven gear 8 is meshed and connected with the connecting gear 9, and one side of the blocking member 4 is provided with a tooth pattern meshed and connected with the connecting gear 9. After the blocking member 4 is driven by the spring, the connecting gear 9 is driven to rotate through the tooth pattern of the blocking member 4, and the connecting gear 9 drives the driven gear 8 to rotate, and the driven gear 8 rotates to drive the rotating valve of the carbon dioxide tank 6 to rotate, thereby realizing the function of controlling the opening of the carbon dioxide tank 6 when the blocking member 4 moves.

[0026] In this embodiment, the ventilation hole 3 is arranged at the bottom, and the rotating valve of the carbon dioxide tank 6 is arranged at the top, which helps the carbon dioxide to fill the box body 1 from top to bottom after being released. Therefore, the connecting gear 9 is divided into a first gear 901 and a second gear 902. The first gear 901 is meshed with the teeth of the sealing member 4, and the second gear 902 is meshed with the driven gear 8 to transmit the force generated by the movement of the bottom sealing member 4 to the driven gear 8.

[0027] Furthermore, a safety lock assembly 10 is also arranged between the second gear 902 and the driven gear 8. The safety lock assembly 10 includes a safety gear 101 meshingly connected to both the second gear 902 and the driven gear 8, and an operating rod 102 is connected to the safety gear 101 coaxially and rotatably. The connection between the safety gear 101 and the operating rod 102 can be through a bearing connection; or a clearance fit is formed between the part of the operating rod 102 passing through the safety gear 101 and the hole opened in the safety gear 101 for accommodating the operating rod 102 to pass through, and a baffle fixedly connected to the operating rod 102 is arranged on the part other than the two side surfaces of the safety gear 101, and the safety gear 101 is pushed to follow the axial movement of the operating rod 102 through the baffle; or other connection forms that enable the operating rod 102 and the safety gear 101 to rotate independently but move axially synchronously. A safety base 103 with a notch and a hollow interior is provided at a position corresponding to the end surface of one end of the operating rod 102 in the box body 1. One end of the operating rod 102 extends to the safety base 103, and the other end of the operating rod 102 extends outside the box body 1. A locking baffle 104 matching the notch of the safety base 103 is provided at one end of the operating rod 102 corresponding to the safety base 103. The operating rod 102 is pressed axially to lock so that the baffle extends into the safety base 103 and drives the safety gear 101 out of the meshing state with the second gear 902 and the driven gear 8. After pressing, the operating rod 102 is rotated to rotate the locking baffle 104 to a position that does not correspond to the notch of the safety base 103, so that the operating rod 102 cannot be reset, and the safety gear 101 is locked in a state of being out of meshing with the driven gear 8.

[0028] Furthermore, a return spring is provided between the safety base 103 and the safety gear 101 to provide additional thrust for the safety gear 101 to return to the meshing state with the driven gear 8 after the safety locking state of the safety gear 101 is released.

[0029] Working principle: Connect the carbon dioxide tank 6 to the box 1, pull the operating rod 102 to move the safety gear 101 to a position that is meshed with the driven gear 8 and the second gear 902. When the box 1 is powered on, the electromagnet 2 attracts the ferromagnetic metal block, and the ferromagnetic metal block drives the blocking piece 4 to move to a position that is out of the blocking vent 3, and closes the door of the box 1. When an abnormal temperature or smoke reaches a threshold in the box 1, the power-off protection switch immediately cuts off the power. After the power is cut off, the blocking piece 4 moves to the position of blocking the vent 3 under the action of the spring to prevent the fire from spreading outward and prevent oxygen from entering. During the movement of the blocking piece 4, the tooth pattern on one side of the blocking piece 4 drives the first gear 901 to rotate, the second gear 902 rotates with the first gear 901, and the safety gear 101 and the driven gear 8 rotate with the first gear 901. Finally, the rotating valve of the carbon dioxide tank 6 is opened under the rotation of the driven gear 8, so that the carbon dioxide is released and enters the box 1 to assist in extinguishing the fire.

[0030] Under the premise that no fire occurs, when the distribution box is to be terminated, the operating rod 102 is pressed to make the locking baffle 104 pass through the gap of the safety base 103 and enter the safety base 103, so that the safety gear 101 is disengaged from the meshing state with the driven gear 8 and the second gear 902, and the operating rod 102 is rotated to make the locking baffle 104 disengage from the position corresponding to the gap of the safety base 103, so that the position of the safety gear 101 is locked and cannot be reset. At this time, after turning off the power supply, the electromagnet 2 is powered off, and the blocking member 4 moves to the position of blocking the ventilation hole 3 under the action of the spring, but the carbon dioxide tank 6 will not be opened. When the distribution box is reactivated next time, the safety gear 101 can be reset to the state where the driven gear 8 and the second gear 902 are both meshed by the operating rod 102.

[0031] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, and may be located in one place or distributed over multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0032] In the present application, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation", "screw-on" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in this application according to the specific circumstances.

[0033] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and concept of the present application, and all these changes or substitutions should fall within the protection scope of the claims attached to the present application.

Claims

1. A distribution box for indoor power distribution in a building, comprising a box body (1), wherein a power-off protection switch is arranged in the box body (1), and the power-off protection switch is connected to a smoke sensor and a temperature sensor, wherein: The power-off protection switch is also connected to an electromagnet (2); a ventilation hole (3) is provided on one side of the box body (1); a blocking piece (4) is movably connected to the inner side surface of the box body (1); a ferromagnetic metal block is provided on the blocking piece (4) at a position corresponding to the electromagnet (2); the blocking piece (4) is also provided with a connecting piece (5) connected to the box body (1); after the electromagnet (2) is powered off, the blocking piece (4) moves along the inner side surface of the box body (1) under the action of the connecting piece (5) to a position where the ventilation hole (3) is blocked.

2. The distribution box for indoor power distribution in a building according to claim 1, characterized in that: The connecting member (5) is a spring.

3. The distribution box for indoor power distribution in a building according to claim 2, characterized in that: The inner side surface of the box body (1) is provided with a slideway, and the blocking member (4) is provided with a sliding block that cooperates with the slideway.

4. The distribution box for indoor power distribution in a building according to claim 1, characterized in that: The number of the ventilation holes (3) is at least one, and the number of the blocking members (4) and the electromagnets (2) matches the number of the ventilation holes (3).

5. The distribution box for indoor power distribution in a building according to claim 1, characterized in that: It also comprises a carbon dioxide tank (6) having a rotary valve, wherein a connecting rod (7) and a driven gear (8) are rotatably connected in the box body (1), the connecting rod (7) is provided with a connecting gear (9) coaxial with the connecting rod, the rotary valve of the carbon dioxide tank (6) is connected to the driven gear (8), the driven gear (8) is meshingly connected to the connecting gear (9), and one side of the blocking member (4) is provided with a tooth pattern meshingly connected to the connecting gear (9).

6. The distribution box for indoor power distribution in a building according to claim 5, characterized in that: The connecting gear (9) comprises a first gear (901) and a second gear (902); the first gear (901) is meshingly connected with the tooth pattern of the blocking member (4); and the second gear (902) is meshingly connected with the driven gear (8).

7. The distribution box for indoor power distribution in a building according to claim 6, characterized in that: A safety lock assembly (10) is also provided between the second gear (902) and the driven gear (8), the safety lock assembly comprising a safety gear (101) meshingly connected to both the second gear (902) and the driven gear (8), an operating rod (102) penetrating the safety gear (101) and coaxially rotatably connected thereto, a safety base (103) with a notch and hollow inside is provided at a position corresponding to an end surface of one end of the operating rod (102) in the housing (1), one end of the operating rod (102) extends to the safety base (103), the other end of the operating rod (102) extends outside the housing (1), a locking baffle (104) matching the notch of the safety base (103) is provided at one end of the operating rod (102) corresponding to the safety base (103), and the operating rod (102) is pressed axially so that the locking baffle (104) extends into the safety base (103) and drives the safety gear (101) out of meshing with the second gear (902) and the driven gear (8).

8. The distribution box for indoor power distribution in a building according to claim 7, characterized in that: A return spring is provided between the safety base (103) and the safety gear (101).

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