CN220234183U - Overvoltage low protection device - Google Patents

Abstract

The utility model discloses a voltage over-low protection device which comprises a device box, wherein an energy storage element is arranged on the front side of an inner cavity of the device box, a time relay is arranged on the back side of the inner cavity of the device box, a DC/DC module is arranged on the left side of the inner cavity of the device box, and a DC/AC module is arranged on the right side of the inner cavity of the device box. The external power grid can charge the energy storage element through the DC/DC module, when the voltage of the external power grid fluctuates, the power supply circuit of external load equipment can be cut off, the energy storage element supplies power to the low-voltage protector of the external load equipment through the DC/DC module so as to compensate the voltage of the load equipment, meanwhile, the power supply time can be regulated and controlled through the time relay, the compensation voltage is automatically disconnected after the set time is reached, the original power supply is switched to, the original power supply voltage avoids the fluctuation if the original power supply voltage is recovered to be normal, and the protector trips if the original power supply voltage is still lower than the normal voltage so as to prevent the equipment from being damaged and avoid the loss of the production of enterprises caused by the voltage fluctuation.

Description

Overvoltage low protection device

Technical Field

The utility model relates to the technical field of voltage protection, in particular to a voltage too low protection device.

Background

Voltage sag is also called voltage dip, voltage sag, etc., and the power industry is used to as "power grid" and refers to a phenomenon in which the effective value of voltage suddenly drops and then suddenly returns to normal. The international society of electrical and electronic engineers defines a voltage sag as a voltage drop of 90% to 10% of nominal value, typically for a duration of 10 ms to several seconds.

The utility model with the publication number of CN216526110U discloses a voltage sag and drop protection device, through fixedly mounting the voltage sag protection device on a mounting plate, an annular column is aligned with a disc, the mounting plate is pressed, so that the turntable enters the inner side of a round hole, the turntable can contact and push a connecting rod to slide in the disc, the connecting rod pushes a sliding block to slide towards the outer side of the disc, along with the continuous pushing of the mounting plate, a chute on the annular column can be clamped with the sliding block, a reset spring is in a compressed state, the effect of fixing the voltage sag protection device on a fixing plate is achieved, small-amplitude rotation of the voltage sag protection device can be realized through rotating the mounting plate, and the voltage sag protection device is convenient to be connected with a circuit. When the device carries out voltage protection to enterprise load equipment, the structure of regulation and control is not carried out voltage compensation time to the load equipment's compensation circuit can't break off and switch to original power, and load equipment is in low pressure protection state for a long time, leads to its unable normal work, can cause the loss to the production of enterprise. Therefore, the present utility model provides a protection device for low voltage to solve the above-mentioned problems.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model aims to provide a voltage overvoltage protection device which has the advantages of automatically disconnecting and switching a compensation circuit of load equipment to an original power supply and can solve the problems of the current voltage sag protection device.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a low protection device of voltage, includes the device case, the front of device case inner chamber is provided with energy storage element, the back of device case inner chamber is provided with time relay, the left side of device case inner chamber is provided with DC/DC module, through wire electric connection between energy storage element and the DC/DC module, the right side of device case inner chamber is provided with DC/AC module, time relay passes through wire electric connection with DC/AC module, the outer lane of device case is even to be provided with a plurality of cooling mechanism.

Preferably, the top of the device box is provided with an opening, the top of the inner ring of the device box is provided with a support frame, and the top of the support frame is provided with a sealing cover.

Preferably, the energy storage element is a super capacitor, and the DC/AC module is electrically connected with the energy storage element through a wire.

As the preferred scheme, the cooling mechanism comprises a cooling disc, wherein the cooling disc is fixed on the outer wall of the device box, the cooling disc is in a hollow state and is far away from an opening on one side of the device box, and a plurality of heat conducting rods are uniformly arranged on one side of the cooling disc, which is close to the device box.

As the preferable scheme, the even through connection in top of closing cap has a plurality of fixing bolt, a plurality of screw holes have been seted up evenly to the top of frame, the inner chamber of screw hole is run through to fixing bolt's bottom, fixing bolt and screw hole one-to-one.

As the preferable scheme, one side of the heat conducting rod far away from the heat radiating disc penetrates through the outer wall of the device box and stretches into the inner cavity of the device box, and a plurality of heat radiating holes are uniformly formed in the outer ring of the heat radiating disc.

Compared with the prior art, the utility model has the following beneficial effects:

1. the external power grid can charge the energy storage element through the DC/DC module, when the voltage of the external power grid fluctuates, the power supply circuit of the external load equipment is cut off, the energy storage element supplies power to the low-voltage protector of the external load equipment through the DC/DC module so as to compensate the voltage of the load equipment, meanwhile, the power supply time can be regulated and controlled through the time relay, the compensation voltage is automatically disconnected after the set time is reached, the original power supply is switched to, the voltage of the original power supply is recovered to normal work if the load equipment is recovered to normal, and the protector is tripped if the voltage is still lower than the normal voltage so as to prevent the equipment from being damaged and avoid loss caused to the production of enterprises.

2. The heat that the device incasement components and parts produced at the during operation gives off to the surrounding air in, and the heat-conducting rod can absorb the heat of device incasement air and will conduct for the cooling plate, and the cooling plate can give off the heat outside the device case, and the area of contact of cooling plate and outside air can be increased to the louvre simultaneously to improve its radiating efficiency, so can carry out the effectual heat dissipation in time to the inside components and parts of device incasement, in order to avoid the components and parts to burn out because of the heat accumulation is too much, and then can improve the life of components and parts.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic perspective view of the utility model without a cover;

FIG. 3 is a schematic perspective view of the inner cavity of the device box of the present utility model;

fig. 4 is a schematic perspective view of a heat dissipation mechanism according to the present utility model.

In the drawings, the list of components represented by the various numbers is as follows:

1. an apparatus box; 11. a frame is supported; 111. a threaded hole; 12. a cover; 2. an energy storage element; 3. a time relay; 4. a DC/DC module; 5. a DC/AC module; 6. a heat dissipation mechanism; 61. a heat dissipation plate; 611. a heat radiation hole; 62. a heat conduction rod; 7. and (5) fixing bolts.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, the present utility model provides a technical solution of a protection device for overvoltage, and the present utility model is further described in detail below with reference to the accompanying drawings.

Examples

The utility model provides a low protection device of voltage, includes device case 1, and the front of device case 1 inner chamber is provided with energy storage element 2, and the back of device case 1 inner chamber is provided with time relay 3, and the left side of device case 1 inner chamber is provided with DC/DC module 4, and the right side of device case 1 inner chamber is provided with DC/AC module 5, and the outer lane of device case 1 is even to be provided with a plurality of cooling machanism 6.

Specifically, as shown in fig. 1 and 2, the top opening of the device box 1, the top of the inner ring of the device box 1 is provided with a support frame 11, the top of the support frame 11 is provided with a sealing cover 12, the top of the sealing cover 12 is uniformly connected with a plurality of fixing bolts 7 in a penetrating way, the top of the support frame 11 is uniformly provided with a plurality of threaded holes 111, the bottoms of the fixing bolts 7 penetrate through the inner cavities of the threaded holes 111, the fixing bolts 7 are in one-to-one correspondence with the threaded holes 111, when the device is used, the inside of the device box 1 can be sealed through the sealing cover 12, and meanwhile, the sealing cover 12 can be fixed on the support frame 11 by inserting the fixing bolts 7 into the corresponding threaded holes 111 and screwing.

Specifically, as shown in fig. 2, the energy storage element 2 is a super capacitor, the energy storage element 2 is electrically connected with the DC/DC module 4 through a wire, when the voltage of the external power grid is stable, the AC/DC module in the power supply system can supply power to the internal and external load devices of the enterprise, meanwhile, when the voltage of the energy storage element 2 is lower than 57V, the external power grid can charge the super capacitor through the DC/DC module 4, and when the voltage of the energy storage element 2 is higher than 84V, the charging is stopped.

Further, as shown in fig. 2, the DC/AC module 5 is electrically connected to the energy storage element 2 through a wire, the time relay 3 is electrically connected to the DC/AC module 5 through a wire, when the voltage of the external power grid fluctuates, the power supply circuit of the external load device is cut off, the energy storage element 2 supplies power to the low-voltage protector of the external load device through the DC/DC module 4 so as to compensate the voltage of the load device, meanwhile, the power supply time can be regulated and controlled through the time relay 3, the compensation voltage is automatically disconnected after the set time is reached, and the power supply is switched to the original power supply, if the voltage of the original power supply is recovered to normal, and if the voltage is still lower than the normal voltage, the protector trips, so that the equipment is not damaged, and loss caused by production of enterprises is avoided.

Examples

Specifically, as shown in fig. 3 and 4, the heat dissipation mechanism 6 includes a heat dissipation disc 61, the heat dissipation disc 61 is fixed on the outer wall of the device box 1, the heat dissipation disc 61 is hollow and is open at one side far away from the device box 1, a plurality of heat conducting rods 62 are uniformly arranged at one side of the heat dissipation disc 61 close to the device box 1, one side of the heat conducting rods 62 far away from the heat dissipation disc 61 penetrates through the outer wall of the device box 1 and stretches into the inner cavity of the device box 1, a plurality of heat dissipation holes 611 are uniformly formed in the outer ring of the heat dissipation disc 61, heat generated by components in the device box 1 during operation is dissipated into ambient air, the heat conducting rods 62 can absorb heat of the air in the device box 1 and conduct the heat to the heat dissipation disc 61, the heat dissipation disc 61 can dissipate the heat to the outside of the device box 1, and meanwhile, the heat dissipation holes 611 can increase the contact area between the heat dissipation disc 61 and the external air so as to improve the heat dissipation efficiency of the components in the device box 1, so as to avoid burning loss of the components due to excessive heat accumulation and further improve the service life of the components.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. In the description of the present specification, the description with reference to the terms "one aspect," "some aspects," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the aspect or example is included in at least one aspect or example of the present utility model. In this specification, the schematic representations of the above terms are not necessarily for the same scheme or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more aspects or examples.

Claims (6)

1. An overvoltage protection device comprising a device box (1), characterized in that: the device comprises a device box (1), wherein an energy storage element (2) is arranged on the front side of an inner cavity of the device box (1), a time relay (3) is arranged on the back side of the inner cavity of the device box (1), a DC/DC module (4) is arranged on the left side of the inner cavity of the device box (1), the energy storage element (2) is electrically connected with the DC/DC module (4) through a wire, a DC/AC module (5) is arranged on the right side of the inner cavity of the device box (1), the time relay (3) is electrically connected with the DC/AC module (5) through a wire, and a plurality of heat dissipation mechanisms (6) are uniformly arranged on the outer ring of the device box (1).

2. The undervoltage protection device of claim 1, wherein: the device is characterized in that the top of the device box (1) is provided with an opening, a supporting frame (11) is arranged at the top of the inner ring of the device box (1), and a sealing cover (12) is arranged at the top of the supporting frame (11).

3. The undervoltage protection device of claim 1, wherein: the energy storage element (2) is a super capacitor, and the DC/AC module (5) is electrically connected with the energy storage element (2) through a wire.

4. The undervoltage protection device of claim 1, wherein: the heat dissipation mechanism (6) comprises a heat dissipation disc (61), wherein the heat dissipation disc (61) is fixed on the outer wall of the device box (1), the heat dissipation disc (61) is in a hollow state and is far away from one side opening of the device box (1), and a plurality of heat conduction rods (62) are uniformly arranged on one side, close to the device box (1), of the heat dissipation disc (61).

5. A low voltage protection device according to claim 2, characterized in that: the top of closing cap (12) is even through-connection has a plurality of fixing bolt (7), a plurality of screw holes (111) have been seted up evenly at the top of frame (11), the inner chamber of screw hole (111) is run through to the bottom of fixing bolt (7), fixing bolt (7) and screw hole (111) one-to-one.

6. The undervoltage protection device of claim 4, wherein: one side of the heat conducting rod (62) far away from the heat radiating disc (61) penetrates through the outer wall of the device box (1) and stretches into the inner cavity of the device box (1), and a plurality of heat radiating holes (611) are uniformly formed in the outer ring of the heat radiating disc (61).