A drawer-type power distribution device and automatic early warning method thereof

Abstract

The present invention discloses a drawer-type power distribution device and an automatic early warning method thereof, wherein the drawer-type power distribution device comprises a power distribution cabinet body and a plurality of drawer cabinets arranged on the power distribution cabinet body, wherein the slide rail assemblies on both sides of each drawer space of the power distribution cabinet body are arranged in an inclined manner with the rear side higher and the front side lower so that the drawer cabinet can slide outward under the action of gravity when the limit fixing state is released; an electrical sliding connection block is arranged at the rear side of the drawer cabinet body, and an electrical fixed connection block is arranged at the rear end of the drawer space, and a first contact terminal is electrically connected to a second contact terminal so that the components in the drawer cabinet body are electrically connected to an external electrical system. The present invention realizes electrical connection and disconnection through the cooperation of the electrical sliding connection block and the electrical fixed connection block, so that when a fault or risk early warning occurs, the electrical connection and spatial position between the power distribution cabinet body side and the drawer cabinet side can be effectively isolated, thereby avoiding further escalation of the fault or safety accident and improving the safety performance of the power distribution device.

Description

Technical Field

[0001] The invention relates to the technical field of power distribution safety control of a power distribution cabinet, and in particular to a drawer-type power distribution device and an automatic early warning method thereof. Background Art

[0002] Drawer-type power distribution cabinets have high reliability, safety and interchangeability. They are suitable for industrial and mining enterprises and high-rise buildings that require high power supply reliability. As a centralized power distribution center, they are used for power generation, transmission, distribution, power conversion and control of power consumption equipment. Existing drawer-type power distribution cabinets are usually installed in the cabinet body. In order to ensure the safe operation and timely response of the power system in the event of a fault, they are equipped with an early warning system, which usually includes the following aspects: overload protection, short circuit protection, temperature monitoring, insulation monitoring, ground fault monitoring, gas leakage detection, etc.

[0003] In terms of temperature early warning monitoring, the temperature sensors inside traditional power distribution cabinets can monitor the operating temperature of the equipment in real time. If the temperature exceeds the preset safety range, the early warning system will sound an alarm, indicating possible heat dissipation problems or equipment overheating. However, the operating conditions of the power distribution cabinet are complex and change rapidly. When the temperature is abnormal or the temperature rise exceeds the critical value, it will present a rapid change. Relying on early warning alarms and simple circuit control methods cannot curb the deterioration of the situation. In serious cases, it is easy to cause safety accidents such as fires. At present, there is a lack of effective means for the safety protection and safety early warning of the power distribution cabinet, resulting in low safety of the power distribution cabinet. Summary of the invention

[0004] In response to the problem of low safety performance of the safety protection and safety warning of the above-mentioned distribution cabinet, the present invention provides a drawer-type power distribution device and an automatic warning method thereof, which mechanically isolates the electrical system on the main body side of the distribution cabinet and the electrical system on the drawer cabinet side, effectively cutting off the electrical connection on both sides when a fault or warning fault occurs, thereby improving the safety performance of the drawer-type power distribution device.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a drawer-type power distribution device, comprising a power distribution cabinet body and a plurality of drawer cabinets arranged on the power distribution cabinet body, wherein the slide rail assemblies on both sides of each drawer space of the power distribution cabinet body are arranged to be higher at the back and lower at the front so that the drawer cabinet can slide outwards under the action of gravity when the limit fixing state is released;

[0006] An electrical sliding connection block is provided at the rear side of the drawer cabinet, the electrical sliding connection block is electrically connected to the components in the drawer cabinet, and a positioning groove is provided in the bottom concavely, and a plurality of first contact terminals are provided in the positioning groove;

[0007] An electrical fixing connection block is provided at the rear end of the drawer space, the electrical fixing connection block is electrically connected to the external electrical system, a positioning portion is provided on the top protrusion, and a plurality of second contact terminals are provided on the positioning portion;

[0008] The first contact terminal is electrically connected to the second contact terminal so that the components in the drawer cabinet are electrically connected to an external electrical system.

[0009] As a further improvement of the present invention: a wire opening is provided in the middle of the rear side of the drawer cabinet, and vertical elastic slide rails are respectively provided on both sides of the wire opening;

[0010] The electrical sliding connection block is provided with a plurality of wiring terminals electrically connected to a plurality of first contact terminals on one side close to the drawer cabinet, and the components in the drawer cabinet are electrically connected to the wiring terminals after connecting wires pass through the wire openings;

[0011] The electrical sliding connection block is located on the side where the wiring terminal is located, and an elastic slider is provided corresponding to the elastic slide rail. The elastic slider is installed on the elastic slide rail and is always pushed by the downward elastic force. The electrical sliding connection block is located at the lower end of the elastic slide rail without compressing the elastic force.

[0012] As a further improvement of the present invention: the inner side surface of the positioning groove of the electrical sliding connection block and the outer side surface of the positioning part of the electrical fixed connection block are mutually matching inclined surfaces, the first contact terminal is arranged on the bottom surface of the positioning groove, and the second contact terminal is arranged on the top surface of the positioning part. When the electrical sliding connection block slides down and closes with the electrical fixed connection block through the inclined surface positioning, the first contact terminal contacts and the second contact terminal is electrically connected.

[0013] As a further improvement of the present invention: the top surface of the electrical fixed connection block is located outside the positioning portion and is provided with a plurality of movable protrusions, the movable protrusions are connected to the movable plate below through movable columns, a sealed space is provided below the movable plate, the sealed space is filled with heat-expandable material, when the heat-expandable material is in an environment of a set critical temperature, it expands and lifts the movable plate, thereby pushing the movable column and the movable protrusions up, and the movable protrusions lift the electrical sliding connection block so that the drawer cabinet slides outward under the action of gravity.

[0014] As a further improvement of the present invention: a push rod assembly is provided in the electrical fixed connection block, and the push rod assembly has two left and right push rods symmetrically arranged on the left and right sides of the positioning part. When the push rod assembly receives a trigger signal, it is ejected from the electrical fixed connection block to lift the electrical sliding connection block.

[0015] As a further improvement of the present invention: a first sensor group is provided in the electrical fixed connection block, and the first sensor group is electrically connected to the control end of the ejector assembly so as to control the ejector to be ejected when the first sensor group sends a trigger signal;

[0016] A second sensor group is disposed in the drawer cabinet, and the second sensor group is electrically connected to a control end of a push rod assembly in an electrical fixed connection block through a contact terminal so as to control the push rod to be ejected when the second sensor group sends a trigger signal.

[0017] On the other hand, the present invention also selects the following technical solution, such as the automatic early warning method of the drawer-type power distribution device mentioned above, comprising the following steps:

[0018] Acquire a real-time temperature value T0 in the drawer space, wherein the real-time temperature value T0 is collected by the first sensor group or the second sensor group;

[0019] Determine whether the real-time temperature value T0 exceeds the preset temperature threshold T max :

[0020] When the real-time temperature value T0 exceeds the preset temperature threshold T max When the electric sliding connection block is lifted, a trigger signal is sent to the push rod assembly in the electrical fixed connection block of the drawer space, and a fault alarm signal is output to the outside through the power distribution cabinet body; the control end of the push rod assembly receives the trigger signal and starts to control the push rod to push upward, so that the electrical sliding connection block is lifted to completely leave the electrical fixed connection block, and at this time the drawer cabinet automatically slides out on the inclined slide rail assembly under the action of gravity;

[0021] When the real-time temperature value T0 is lower than the preset temperature threshold T max When the average temperature value T in time period t is obtained t , the average temperature value T t is the average of the real-time temperature values ​​of the front end, middle end and back end of the time period t, and determines whether the average temperature values ​​of n consecutive time periods t are all in the preset high range:

[0022] If so, a critical alarm signal is output;

[0023] If not, continue monitoring.

[0024] As a further improvement of the present invention, the method further includes a temperature trend early warning step:

[0025] Get three adjacent time periods t m-2 ,t m-1 ,t m The highest real-time temperature value T m-2 , T m-1 , T m , determine the highest real-time temperature value Tm-2 , T m-1 , T m Is there a climbing node?

[0026] When T m -T m-1 ≥T k When T k is the preset temperature change allowable value, marking the existence of climbing nodes in the two adjacent time periods, and counting the number of climbing nodes Q=Q+1, the initial number is Q=0, when T m -T m-2 ≥T k When , the two interval time periods are also marked as climbing nodes, and the number of climbing nodes continues to be counted Q=Q+1;

[0027] Determine whether the number of climbing nodes Q is greater than m in any continuous m time periods:

[0028] When Q>m, it means that there is a temperature rise trend in m consecutive time periods, and a risk alarm signal is issued;

[0029] When Q≤m, it means that the temperature changes normally or the system operates under normal temperature conditions for m consecutive time periods, and the system is continuously monitored.

[0030] As a further improvement of the present invention, the temperature trend early warning step further includes:

[0031] When a risk alarm signal occurs in a drawer space that has output a critical alarm signal, it indicates that the drawer space and / or the drawer cabinet of the drawer space is in a high temperature range and has a temperature rise trend, and a trigger signal is sent to the ejector assembly in the electrical fixed connection block of the drawer space, and a fault alarm signal is output to the outside through the power distribution cabinet body; the control end of the ejector assembly receives the trigger signal and starts to control the ejector to eject upward, so that the electrical sliding connection block is lifted to completely leave the electrical fixed connection block, and the drawer cabinet automatically slides out on the inclined slide rail assembly under the action of gravity;

[0032] When a risk alarm signal occurs in a drawer space that has output a fault alarm signal, it means that the temperature of the drawer space is still rising after the electrical connection is disconnected, that is, the electrical fault on the main body of the distribution cabinet has not been resolved. At this time, the top rods of all the electrical fixed connection blocks of the main body of the distribution cabinet are controlled to be pushed out, and the electrical sliding connection blocks in the entire main body of the distribution cabinet are lifted, so that all drawer cabinets slide out automatically and output emergency processing signals.

[0033] As a further improvement of the present invention, the method further comprises a hard warning step:

[0034] When the temperature inside the power distribution cabinet body rises to a set critical temperature, the heat-expandable material in the sealed space inside the electrical fixed connection block expands, and the expansion lifts the movable plate, thereby pushing the movable column and the movable protrusion up, and the movable protrusion lifts the electrical sliding connection block, so that the drawer cabinet body slides outwards under the action of gravity;

[0035] In the absence of a control signal, the heat-expandable material expands due to heat, causing the electrical fixed connection block and the electrical sliding connection block to be disconnected electrically, which is determined to be an emergency processing state. At this time, the top rods of all the electrical fixed connection blocks of the distribution cabinet body are controlled to be ejected, lifting the electrical sliding connection blocks in the entire distribution cabinet body, causing all drawer cabinets to slide out automatically, and an emergency processing signal is output.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] The present invention realizes electrical connection and disconnection through the cooperation of the electrical sliding connection block and the electrical fixed connection block, so that when a fault or risk warning occurs, the electrical connection and spatial position between the main body side of the distribution cabinet and the drawer cabinet side can be effectively isolated, avoiding further escalation of the fault or safety accident and improving the safety performance of the distribution device. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solution, the drawings required for use in the implementation will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0039] Figure 1 It is a structural schematic diagram of the present invention;

[0040] Figure 2 It is a schematic diagram of the local structure in a drawer space in the main body of the power distribution cabinet;

[0041] Figure 3 It is a schematic diagram of a partial state of an electrical sliding connection block and an electrical fixed connection block;

[0042] Figure 4 It is another partial state schematic diagram of the electrical sliding connection block and the electrical fixed connection block;

[0043] Figure 5 It is a schematic diagram of the automatic early warning method flow of the present invention;

[0044] Figure 6 It is a schematic diagram of the temperature trend early warning process of the present invention. DETAILED DESCRIPTION

[0045] In order to enable a clear and complete understanding of the technical solution, the present invention is further described in conjunction with the embodiments and drawings. Obviously, the described embodiments are only some embodiments of the present invention, and all other embodiments obtained by technicians in the relevant field without making creative work are within the scope of protection of the present invention.

[0046] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0047] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0048] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0049] An embodiment of the present invention provides a drawer-type power distribution device, such as Figure 1 and Figure 2 As shown, it includes a distribution cabinet body 100 and a plurality of drawer cabinets 200 arranged on the distribution cabinet body 100. The slide rail assemblies 300 on both sides of each drawer space of the distribution cabinet body 100 are arranged to be higher at the back and lower at the front so that the drawer cabinets 200 can slide outwards under the action of gravity when the limit fixing state is released.

[0050] An electrical sliding connection block 400 is provided at the rear side of the drawer cabinet 200, and the electrical sliding connection block 400 is electrically connected to the components in the drawer cabinet 200, and a positioning groove 410 is provided in the bottom concavely, and a plurality of first contact terminals 420 are provided in the positioning groove 410;

[0051] An electrical fixing connection block 500 is provided at the rear end of the drawer space, and the electrical fixing connection block 500 is electrically connected to the external electrical system. A positioning portion 510 is provided on the top protrusion, and a plurality of second contact terminals 520 are provided on the positioning portion 510.

[0052] The first contact terminal 420 is electrically connected to the second contact terminal 520 so that the components in the drawer cabinet 200 are electrically connected to an external electrical system.

[0053] In this embodiment, after the drawer cabinet 200 is pushed into the end of the drawer space, the electrical sliding connection block 400 and the electrical fixed connection block 500 are closed to achieve limited fixation, and at the same time, the first contact terminal 420 and the second contact terminal 520 are in contact to achieve electrical connection. When a fault occurs or a control signal is received, the electrical sliding connection block 400 is lifted and separated from the electrical fixed connection block 500, and the drawer cabinet 200 slides down along the slide rail assembly 300 under the action of gravity and pops out.

[0054] It can be understood by those skilled in the art that the drawer cabinet will automatically slide down and pop out when placed on an inclined slide rail assembly without being affected by other restrictive forces. The present embodiment does not impose any restrictions on the specific parameters of the slide rail assembly and the drawer cabinet. The technicians can set the inclination angle of the slide rail assembly, the weight of the drawer cabinet, etc. according to actual usage requirements. As long as the electrical sliding connection block and the electrical fixed connection block can slide downward under the action of gravity after being separated, the inclination angle can be set to 2°-5°, and the sliding performance can also be increased by increasing the weight of the front baffle of the drawer cabinet, etc.

[0055] It should be noted that the present embodiment does not impose any form of restriction on the sliding process of the drawer cabinet on the slide rail assembly. For example, the smoothness of the downward movement can be achieved by the pulley of the slide rail assembly. A limit can be set at the end of the downward movement to prevent the drawer from detaching. The damping can also be increased at the end of the downward movement to prevent collision, etc. The technicians can realize the conventional function of the drawer cabinet sliding on the slide rail assembly through the existing technology according to actual needs, and this embodiment will not be elaborated in detail.

[0056] This embodiment effectively cuts off the electrical connection between the components of the drawer cabinet 200 and the distribution cabinet body 100 when a failure occurs in the distribution cabinet body, and mechanically completely isolates the electrical connection between the distribution cabinet body 100 and the drawer cabinet 200. At the same time, the drawer cabinet is ejected to minimize the impact on other drawer spaces of the distribution cabinet body, thereby improving safety. After the risk is eliminated by maintenance inspection, the drawer cabinet is directly pushed back to close the electrical sliding connection block 400 and the electrical fixed connection block 500, and the first contact terminal 420 is electrically connected to the second contact terminal 520, and the operation can continue, which greatly reduces the maintenance cost.

[0057] For better understanding, based on the above embodiment, another embodiment of the present invention further provides the following solution: Figure 2 and 3 As shown, a wire opening 210 is provided in the middle of the rear side of the drawer cabinet 200, and vertical elastic slide rails 600 are respectively provided on both sides of the wire opening 210;

[0058] The electrical sliding connection block 400 is provided with a plurality of wiring terminals 430 electrically connected to the plurality of first contact terminals 420 on one side thereof close to the drawer cabinet 200. The components in the drawer cabinet 200 are electrically connected to the wiring terminals 430 through the connecting wires passing through the wire openings.

[0059] The electrical sliding connection block 400 is located on the side where the terminal 430 is located, and an elastic slider 610 is provided corresponding to the elastic slide rail 600. The elastic slider 610 is installed on the elastic slide rail 600 and makes the elastic slider 610 always pushed downward by the elastic force. The electrical sliding connection block 400 is located at the lower end of the elastic slide rail 600 without compressing the elastic force.

[0060] In this embodiment, the elastic slide rail 600 and the elastic slider 610 are used to provide the electrical sliding connection block 400 with a downward elastic force at all times, so that the electrical sliding connection block 400 is closed with the electrical fixed sliding connection block 500 when the drawer cabinet 200 is pushed into the end of the drawer space, and is fixed by the concave positioning groove 410 and the raised positioning portion 510.

[0061] In this embodiment, during the process of pushing the drawer cabinet 200, the electrical sliding connection block 400 is located at the lower end of the elastic slide rail 600 due to the elastic force. When the electrical sliding connection block 400 is about to be pushed into the electrical fixed sliding connection block 500, it is necessary to lift the electrical sliding connection block 400. In this embodiment, an inclined wedge block 310 is also provided at the end of the slide rail assembly on both sides of the drawer space, which is used to lift the electrical sliding connection block 400, so that the electrical sliding connection block 400 compresses the elastic force to slide upward on the elastic slide rail 600, so that the electrical sliding The bottom of the connecting block 400 is lifted and higher than the top surface of the electrical fixed connecting block 500 to prevent the electrical sliding connecting block 400 from colliding with the electrical fixed sliding block 500. When the drawer cabinet 200 is pushed in to the end, the electrical sliding connecting block 400 passes over the inclined wedge block 310. At this time, the electric sliding connecting block 400 is acted upon by the elastic force and slides toward the electrical fixed connecting block 500 so that the first contact terminal 420 is in contact with the second contact terminal 520 for electrical connection, and is limited and fixed by the positioning groove 410 and the positioning portion 510.

[0062] It should be noted that the present embodiment does not impose any restrictions on the specific shape and structure of the inclined wedge block. The technicians can set it according to the spatial position of the slide rail assembly, the drawer space and the drawer cabinet and the use requirements, as long as the electrical sliding connection block is lifted when approaching the electrical fixed connection block to avoid collision. In some embodiments, the lifting structure for lifting the electrical sliding connection block is arranged on the electrical fixed connection block, and when the electrical sliding connection block approaches the electrical fixed connection block, it is lifted and compressed by elastic force, and after passing the lifting structure, it is closed by the elastic force acting on the electrical fixed connection block.

[0063] Furthermore, in order to achieve more accurate positioning between the electrical sliding connection block and the electrical fixed connection block and reduce the influence of forces in various directions when the electrical sliding connection block is lifted, another embodiment of the present invention provides a non-vertical positioning groove and a positioning portion for cooperation, specifically, as Figure 4 As shown, on the basis of the above embodiment, the inner side surface of the positioning groove 410 of the electrical sliding connection block 400 and the outer side surface of the positioning portion 510 of the electrical fixed connection block 500 are mutually matching inclined surfaces, the first contact terminal 420 is arranged on the bottom surface of the positioning groove 410, and the second contact terminal 520 is arranged on the top surface of the positioning portion 510. When the electrical sliding connection block 400 slides down and closes with the electrical fixed connection block 500 through the inclined surface positioning, the first contact terminal 420 and the second contact terminal 520 are in contact and electrically connected.

[0064] In order to make the first contact terminal and the second contact terminal contact better and prevent them from not contacting each other, the height of the positioning part can be appropriately set to be slightly greater than the depth of the positioning groove. When the positioning part is inserted into the positioning groove, the drawer cabinet can be limited and fixed. When the drawer cabinet needs to be pulled out, the limit fixation is released by controlling the lifting of the electrical sliding connection block.

[0065] That is to say, the positioning groove is open outward, with a large opening and a small bottom, and the positioning portion is prism-shaped, with a small top and a large bottom. Because the slide rail assembly is tilted, the drawer cabinet is always subject to gravity, so that the electrical sliding connection block is always subject to a tilted downward force. The use of an inclined surface can reduce the friction between the positioning groove and the wall of the positioning portion when the electrical sliding connection block is lifted, which not only makes the positioning more accurate, but also has a smooth lifting effect. In some embodiments, the positioning groove and the positioning portion are matched with arc surfaces and rounded corners for positioning, which also has the effect of accurate positioning and reducing the friction between the positioning groove and the wall of the positioning portion when being lifted.

[0066] Furthermore, a push rod assembly 530 is provided in the electrical fixed connection block 500, and the push rod assembly has two left and right push rods 540 symmetrically arranged on the left and right sides of the positioning part 510. When the push rod assembly 530 receives a trigger signal, it is ejected from the electrical fixed connection block 500 to lift the electrical sliding connection block 400.

[0067] It can be understood by those skilled in the art that the push rod assembly includes a push rod, a guide mechanism, a driving mechanism, etc. The present embodiment adopts the push rod assembly of the prior art without any limitation on its specific structure and parameter setting, as long as the push rod assembly can be used to push the push rod out of the electrical fixed connection block and lift the electrical sliding connection block to a sufficient height.

[0068] In this embodiment, the push rod assembly drives the push rod to lift the electrical sliding connection block. The height of the positioning portion of the electrical sliding connection block and the depth of the positioning groove of the electric fixed connection block are set at 0.5mm-2mm, so as to achieve the limit fixation of the drawer cabinet. That is to say, the push rod pushes out the electrical fixed connection block more than 0.5mm-2mm, and the electrical sliding connection block is separated from the electric fixed connection block to release the limit fixation, so that the drawer cabinet can automatically slide out under the action of the inclined slide rail assembly and gravity.

[0069] In this embodiment, a first sensor group is provided in the electrical fixed connection block, and the first sensor group is electrically connected to the control end of the ejector assembly so as to control the ejector to be ejected when the first sensor group sends a trigger signal; a second sensor group is provided in the drawer cabinet, and the second sensor group is electrically connected to the control end of the ejector assembly in the electrical fixed connection block through a contact terminal so as to control the ejector to be ejected when the second sensor group sends a trigger signal. The first sensor group and the second sensor group are temperature sensors, which are used to obtain the temperature value on the side of the electrical fixed connection block and the temperature value on the side of the drawer cabinet. When the temperature value collected on either side reaches a preset target value, a trigger signal is output to the control end of the ejector assembly to control the ejector to be ejected from the electrical fixed connection block, and the electrical sliding connection block is lifted and pushed away from the electrical fixed connection block, and the limit fixation is released so that the drawer cabinet automatically slides out under the action of the inclined slide rail assembly and gravity.

[0070] In an optional embodiment, in order to prevent the failure to start the push rod assembly to release the limit fixation in the event of over-temperature, fire, electronic failure, or communication failure, which may worsen the fault condition, this embodiment uses a heat expansion structure directly driven by the high temperature environment to lift the electrical sliding connection block to achieve a hard warning to release the limit fixation. Specifically, Figure 4 As shown, the top surface of the electrical fixed connection block 500 is located outside the positioning portion and is provided with a plurality of movable protrusions 550, and the movable protrusions 550 are connected to the movable plate 570 below through movable columns 560, and a sealed space 580 is provided below the movable plate 570, and the sealed space is filled with heat-expandable material. When the heat-expandable material is in an environment with a set critical temperature, it expands and lifts the movable plate 570, thereby pushing the movable column 560 and the movable protrusions 550 up, and the movable protrusions 550 lift the electrical sliding connection block 400, so that the drawer cabinet slides outward under the action of gravity.

[0071] It should be noted that the present embodiment does not impose any limitation on heat-expandable materials, and technicians can set them according to actual use requirements, as long as they can cause deformation when the temperature reaches the set critical temperature and the lifting movable plate is high enough to separate the electrical sliding connection block from the electrical fixed connection block. However, materials with a higher critical point of thermal deformation temperature should be selected as hard safety warnings and guarantees for the power distribution device, such as liquids or foaming materials that expand when heated in a sealed space when the temperature reaches 120°C. This is used to solve the problem that the limit fixation cannot be released by the lifting assembly of the above embodiment, such as the failure to start the push rod assembly to release the limit fixation due to excessive temperature or fire or electronic or communication failure, which worsens the fault situation, thereby providing a hard warning directly related to high temperature for the safety of the power distribution device.

[0072] Obviously, the above embodiments are only used to illustrate the structure of the drawer-type power distribution device and are not intended to limit the scope of protection of the present invention. Without departing from the concept of the present invention, those skilled in the art can adjust the above drawer-type power distribution device so that the present invention can be applied to more specific application scenarios.

[0073] For better understanding, another embodiment of the present invention provides an automatic warning method, which is implemented by the above embodiment and optional embodiment, and the descriptions that have been made are not repeated. Specifically, an automatic warning method for a drawer-type power distribution device, such as Figure 5 As shown, the following steps are included:

[0074] Obtain the real-time temperature value T0 in the drawer space, wherein the real-time temperature value T0 is collected by the first sensor group or the second sensor group, the first sensor group collects the temperature value on the side of the electrical fixed connection block, and the second sensor group collects the temperature value on the side of the drawer cabinet. It should be noted that the real-time temperature value T0 in the following steps refers to the temperature value collected on one side, and the temperature values ​​collected on both sides are not mixed for judgment, that is, the real-time temperature value for executing the following steps is the temperature value collected on the same side.

[0075] Determine whether the real-time temperature value T0 exceeds the preset temperature threshold T max , preset temperature threshold T max , which limits the normal maximum operating temperature. The specific parameter settings are affected by the cabinet material, the design specifications of the internal components and the standards and specifications followed. This embodiment does not impose any form of restriction on the specific numerical settings. The technicians set them according to the actual use requirements. For example, it is recommended that the maximum operating temperature of the copper busbar should not exceed 90°C, because the softening temperature of the copper busbar when it is heated for a long time is about 100°C to 200°C. Setting the normal maximum operating temperature at 90°C can avoid the softening of the copper busbar due to overheating, and also ensure that the insulating material will not be degraded due to high temperature.

[0076] When the real-time temperature value T0 exceeds the preset temperature threshold T max When the electric sliding connection block is lifted, a trigger signal is sent to the push rod assembly in the electrical fixed connection block of the drawer space, and a fault alarm signal is output to the outside through the power distribution cabinet body; the control end of the push rod assembly receives the trigger signal and starts to control the push rod to push upward, so that the electrical sliding connection block is lifted to completely leave the electrical fixed connection block, and at this time the drawer cabinet automatically slides out on the inclined slide rail assembly under the action of gravity;

[0077] When the real-time temperature value T0 is lower than the preset temperature threshold T max When the average temperature value T in time period t is obtained t , the average temperature value T t is the average of the real-time temperature values ​​of the front end, middle end and back end of the time period t, and determines whether the average temperature values ​​of n consecutive time periods t are all in the preset high range. The high range of this embodiment is slightly lower than the preset temperature threshold T max Temperature range:

[0078] If so, a critical alarm signal is output, that is, when the average temperature value T of n consecutive time periods t t All are in the high range, which means that the temperature is in the high range for a long time, but the highest real-time temperature value does not exceed the preset temperature threshold T max , there are risks, and it is necessary to focus on or conduct maintenance and judgment on the operating conditions and cooling operations, such as adjusting to reduce the operating power or implementing effective cooling measures. The technicians will perform appropriate operations according to the specific circumstances. This embodiment does not make too many elaborations on the subsequent temperature adjustment and control;

[0079] If not, it means the operating condition is normal and continuous monitoring is required.

[0080] In an optional embodiment, based on the above embodiment, the method further includes a temperature trend early warning step, such as Figure 6 As shown:

[0081] Get three adjacent time periods t m-2 ,t m-1 ,t m The highest real-time temperature value T m-2 , T m-1 , T m , determine the last time period T m Is there a climbing node?

[0082] When T m -T m-1 ≥T k When T kis the preset temperature change allowable value, marking the temperature of the two adjacent time periods as rising, counting the number of rising nodes Q=Q+1, the initial number is Q=0, when T m -T m-2 ≥T k When , the temperature of the two interval time periods is marked to be rising, and the number of rising nodes is counted as Q = Q + 1. That is to say, in any three consecutive time periods, the highest temperature value T in the last time period is m The highest temperature values ​​T in the first two time periods are m-1 and T m-2 Compare, when there is one comparison is T m -T m-1 ≥T k or T m -T m-2 ≥T k When both comparisons are satisfied, the number of climbing nodes increases by 1 unit. When both comparisons are satisfied, the number of climbing nodes increases by 2 units. That is, there are two comparisons in any time period (except the first and second time periods) and there are 2 possible climbing nodes.

[0083] It should be noted that this embodiment does not limit the climbing node counts of the first and second time periods, and adopts the default value method. Because the equipment starts to run, the temperature is in a normal temperature rise state. By default, there are no climbing nodes in the first and second time periods, that is, 0 climbing nodes. Technical personnel can set them according to actual usage needs. For example, if the duration of the time period is set to be shorter or the allowable value of temperature change is set to be smaller, the third time period may still have a temperature rise stage that has just started, and the temperature is in an unstable state. The climbing node counts of the first and second time periods can be appropriately adjusted. This embodiment is mainly suitable for trend warning of temperature changes in operating conditions after startup and stabilization.

[0084] Furthermore, determine whether the number of climbing nodes Q is greater than m in any continuous m time periods:

[0085] When Q>m, it means that there is a temperature rise trend in m consecutive time periods, and a risk alarm signal is issued;

[0086] When Q≤m, it means that the temperature changes normally or the system operates under normal temperature conditions for m consecutive time periods, and the system is continuously monitored.

[0087] On the basis of the above, if there are other alarm signals while outputting the risk alarm signal, the corresponding strategy is further executed to ensure the safety of the power distribution device. Specifically, the temperature trend warning step also includes:

[0088] When a risk alarm signal occurs in a drawer space that has output a critical alarm signal, it indicates that the drawer space and / or the drawer cabinet of the drawer space is in a high temperature range and has a temperature rise trend, and a trigger signal is sent to the ejector assembly in the electrical fixed connection block of the drawer space, and a fault alarm signal is output to the outside through the power distribution cabinet body; the control end of the ejector assembly receives the trigger signal and starts to control the ejector to eject upward, so that the electrical sliding connection block is lifted to completely leave the electrical fixed connection block, and the drawer cabinet automatically slides out on the inclined slide rail assembly under the action of gravity;

[0089] When a risk alarm signal occurs in a drawer space that has output a fault alarm signal, it means that the temperature of the drawer space is still rising after the electrical connection is disconnected. Since the electrical connection of the drawer cabinet has been disconnected, the risk alarm signal is the real-time temperature value collection from the first sensor group on the electrical fixed connection block side, which means that the electrical fault on the main body of the distribution cabinet has not been resolved. At this time, the top rods of all the electrical fixed connection blocks of the main body of the distribution cabinet are controlled to be ejected, and the electrical sliding connection blocks in the entire main body of the distribution cabinet are lifted, so that all the drawer cabinets slide out automatically and output emergency processing signals.

[0090] The present invention also provides another embodiment. Based on the above embodiment or optional embodiment, the method further includes a hard warning step:

[0091] The temperature in the power distribution cabinet body rises to a set critical temperature (in this embodiment, the set critical temperature is greater than the preset temperature threshold T max , that is, when the working temperature rise exceeds the preset temperature value T max After the operation is completed, if there is still a situation such as over-temperature or fire or electronic or communication failure, and the push rod assembly cannot be started to release the limit fixation, which worsens the fault situation), the heat-expandable material in the sealed space in the electrical fixed connection block expands, and the expansion pushes up the movable plate, thereby pushing the movable column and the movable protrusion up, and the movable protrusion lifts the electrical sliding connection block, so that the drawer cabinet slides outward under the action of gravity;

[0092] In the absence of a control signal, the heat-expandable material expands due to heat, causing the electrical fixed connection block and the electrical sliding connection block to be disconnected electrically, which is determined to be an emergency processing state. At this time, the top rods of all the electrical fixed connection blocks of the distribution cabinet body are controlled to be ejected, lifting the electrical sliding connection blocks in the entire distribution cabinet body, causing all drawer cabinets to slide out automatically, and an emergency processing signal is output.

[0093] The above disclosure is only one or more preferred embodiments of the present invention, which are used to help understand the inventive concept of the technical solution, and is not intended to limit the present invention in other forms. Technical personnel in the relevant field may make other equivalent or customary replacement schemes based on the features defined by the present invention, which still fall within the scope of the present invention.

Claims

1. A drawer-type power distribution device, comprising a power distribution cabinet body and a plurality of drawer cabinet bodies arranged on the power distribution cabinet body, characterized in that: The slide rail assemblies on both sides of each drawer space of the power distribution cabinet body are arranged with the back higher and the front lower, so that the drawer cabinet body can slide outwards under the action of gravity when the limit fixing state is released; An electrical sliding connection block is provided at the rear side of the drawer cabinet, the electrical sliding connection block is electrically connected to the components in the drawer cabinet, and a positioning groove is provided in the bottom concavely, and a plurality of first contact terminals are provided in the positioning groove; An electrical fixing connection block is provided at the rear end of the drawer space, the electrical fixing connection block is electrically connected to the external electrical system, a positioning portion is provided on the top protrusion, and a plurality of second contact terminals are provided on the positioning portion; The first contact terminal is electrically connected to the second contact terminal so that the components in the drawer cabinet are electrically connected to the external electrical system; A wire opening is provided in the middle of the rear side of the drawer cabinet, and vertical elastic slide rails are respectively provided on both sides of the wire opening; The electrical sliding connection block is provided with a plurality of wiring terminals electrically connected to a plurality of first contact terminals on one side close to the drawer cabinet, and the components in the drawer cabinet are electrically connected to the wiring terminals after connecting wires pass through the wire openings; The electrical sliding connection block is located on the side where the wiring terminal is located, and an elastic slider is provided corresponding to the elastic slide rail. The elastic slider is installed on the elastic slide rail and is always pushed by the downward elastic force. The electrical sliding connection block is located at the lower end of the elastic slide rail without compressing the elastic force.

2. A drawer-type power distribution device according to claim 1, characterized in that: The inner side surface of the positioning groove of the electrical sliding connection block and the outer side surface of the positioning part of the electrical fixed connection block are mutually matching inclined surfaces, the first contact terminal is arranged on the bottom surface of the positioning groove, and the second contact terminal is arranged on the top surface of the positioning part. When the electrical sliding connection block slides down and closes with the electrical fixed connection block through the inclined surface positioning, the first contact terminal contacts and the second contact terminal for electrical connection.

3. A drawer-type power distribution device according to claim 1, characterized in that: The top surface of the electrical fixed connection block is located outside the positioning portion and is provided with a plurality of movable protrusions, the movable protrusions are connected to the movable plate below through movable columns, a sealed space is provided below the movable plate, and the sealed space is filled with heat-expandable material, when the heat-expandable material is in an environment of a set critical temperature, it expands and lifts the movable plate, thereby pushing the movable column and the movable protrusions up, and the movable protrusions lift the electrical sliding connection block, so that the drawer cabinet slides outward under the action of gravity.

4. A drawer-type power distribution device according to claim 3, characterized in that: A push rod assembly is provided in the electrical fixed connection block. The push rod assembly has two left and right push rods symmetrically arranged on the left and right sides of the positioning part. When the push rod assembly receives a trigger signal, it is ejected from the electrical fixed connection block to lift the electrical sliding connection block.

5. A drawer-type power distribution device according to claim 4, characterized in that: A first sensor group is provided in the electrical fixed connection block, and the first sensor group is electrically connected to the control end of the ejector assembly so as to control the ejector to be ejected when the first sensor group sends a trigger signal; A second sensor group is disposed in the drawer cabinet, and the second sensor group is electrically connected to a control end of a push rod assembly in an electrical fixed connection block through a contact terminal so as to control the push rod to be ejected when the second sensor group sends a trigger signal.

6. The automatic warning method for a drawer-type power distribution device according to claim 5, characterized in that: The following steps are involved: Acquire a real-time temperature value T0 in the drawer space, wherein the real-time temperature value T0 is collected by the first sensor group or the second sensor group; Determine whether the real-time temperature value T0 exceeds the preset temperature threshold T max : When the real-time temperature value T0 exceeds the preset temperature threshold T max When the electric sliding connection block is lifted, a trigger signal is sent to the push rod assembly in the electrical fixed connection block of the drawer space, and a fault alarm signal is output to the outside through the power distribution cabinet body; the control end of the push rod assembly receives the trigger signal and starts to control the push rod to push upward, so that the electrical sliding connection block is lifted to completely leave the electrical fixed connection block, and at this time the drawer cabinet automatically slides out on the inclined slide rail assembly under the action of gravity; When the real-time temperature value T0 is lower than the preset temperature threshold T max When the average temperature value T in time period t is obtained t , the average temperature value T t is the average of the real-time temperature values ​​of the front end, middle end and back end of the time period t, and determines whether the average temperature values ​​of n consecutive time periods t are all in the preset high range: If so, a critical alarm signal is output; If not, continue monitoring.

7. The automatic warning method for a drawer-type power distribution device according to claim 6 is characterized in that: The method also includes a temperature trend early warning step: Get three adjacent time periods t m-2 ,t m-1 ,t m The highest real-time temperature value T m-2 、T m-1 、T m , determine the highest real-time temperature value T m-2 、T m-1 、T m Is there a climbing node? When T m -T m-1 ≥T k When T k is the preset temperature change allowable value, marking the existence of climbing nodes in the two adjacent time periods, and counting the number of climbing nodes Q=Q+1, the initial number is Q=0, when T m -T m-2 ≥T k When , the two interval time periods are also marked as climbing nodes, and the number of climbing nodes continues to be counted Q=Q+1; Determine whether the number of climbing nodes Q is greater than m in any continuous m time periods: When Q>m, it means that there is a temperature rise trend in m consecutive time periods, and a risk alarm signal is issued; When Q≤m, it means that the temperature changes normally or the system operates under normal temperature conditions for m consecutive time periods, and the system is continuously monitored.

8. The automatic warning method for a drawer-type power distribution device according to claim 7, characterized in that: The temperature trend early warning step also includes: When a risk alarm signal occurs in a drawer space that has output a critical alarm signal, it indicates that the drawer space and / or the drawer cabinet of the drawer space is in a high temperature range and has a temperature rise trend, and a trigger signal is sent to the ejector assembly in the electrical fixed connection block of the drawer space, and a fault alarm signal is output to the outside through the power distribution cabinet body; the control end of the ejector assembly receives the trigger signal and starts to control the ejector to eject upward, so that the electrical sliding connection block is lifted to completely leave the electrical fixed connection block, and the drawer cabinet automatically slides out on the inclined slide rail assembly under the action of gravity; When a risk alarm signal occurs in a drawer space that has output a fault alarm signal, it means that the temperature of the drawer space is still rising after the electrical connection is disconnected, that is, the electrical fault on the main body of the distribution cabinet has not been resolved. At this time, the top rods of all the electrical fixed connection blocks of the main body of the distribution cabinet are controlled to be pushed out, and the electrical sliding connection blocks in the entire main body of the distribution cabinet are lifted, so that all drawer cabinets slide out automatically and output emergency processing signals.

9. The automatic warning method for a drawer-type power distribution device according to claim 6, characterized in that: The method also includes a hard warning step: When the temperature inside the power distribution cabinet body rises to a set critical temperature, the heat-expandable material in the sealed space inside the electrical fixed connection block expands, and the expansion lifts the movable plate, thereby pushing the movable column and the movable protrusion up, and the movable protrusion lifts the electrical sliding connection block, so that the drawer cabinet body slides outwards under the action of gravity; In the absence of a control signal, the heat-expandable material expands due to heat, causing the electrical fixed connection block and the electrical sliding connection block to be disconnected electrically, which is determined to be an emergency processing state. At this time, the top rods of all the electrical fixed connection blocks of the distribution cabinet body are controlled to be ejected, lifting the electrical sliding connection blocks in the entire distribution cabinet body, causing all drawer cabinets to slide out automatically, and an emergency processing signal is output.

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