Distributed differential protection device

Abstract

The utility model relates to the technical field of differential protection devices, and provides a distributed differential protection device which comprises a differential protection module, an installation shell and a drying assembly, an installation cavity suitable for installation of the differential protection module is defined in the installation shell, and the drying assembly is arranged on at least one side wall of the installation cavity. And the drying assembly communicates with the mounting cavity and is used for drying the mounting cavity. The drying assembly is arranged on one side or two sides of the shell, so that drying of the inner space of the shell is achieved, the device can normally operate even if the device is installed in the environment with heavy humidity, the applicability of the device is improved, and the service life of the device is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of differential protection devices, in particular to a distributed differential protection device. Background Art

[0002] Differential protection devices have the characteristics of fast action and can achieve good protection selectivity. They have long-term stable operation experience in dedicated fiber optic channel environments. However, distribution networks are numerous and widespread, and line topologies are complex and changeable. Therefore, nowadays, differential protection is usually performed on the normal operation of distribution networks in conjunction with 5G CPE layer 2 networking technology.

[0003] The environment where the differential protection device is arranged is often an environment with high humidity and heavy moisture. This kind of environment will affect the normal operation of the internal electronic components due to excessive moisture accumulation, thus affecting the service life of the device and even affecting the normal differential protection function. Utility Model Content

[0004] The utility model provides a distributed differential protection device, which is used to solve the defect of the differential protection device in the prior art that the service life is short in an environment with heavy moisture.

[0005] The utility model provides a distributed differential protection device, comprising:

[0006] Differential protection module;

[0007] An installation housing defines an installation chamber, wherein the differential protection module is installed in the installation chamber;

[0008] The drying component is arranged on at least one side wall of the installation shell, and the drying component is communicated with the installation chamber.

[0009] According to the distributed differential protection device provided by the utility model, the drying component includes:

[0010] A drying seat, fixedly connected to the side wall to form a drying chamber, wherein the side wall has a connecting hole to connect the drying chamber with the installation chamber;

[0011] A drying block is disposed in the drying chamber so as to absorb moisture in the installation chamber through the drying block.

[0012] According to the distributed differential protection device provided by the utility model, the drying component further comprises a sealing plate, the sealing plate is detachably connected to the drying seat, and the sealing plate is used to seal the drying chamber.

[0013] According to the distributed differential protection device provided by the utility model, a sealing ring is further arranged between the sealing plate and the drying seat.

[0014] According to the distributed differential protection device provided by the utility model, the installation housing has a first side wall and a second side wall which are arranged opposite to each other, and the first side wall and the second side wall are both provided with the drying assembly.

[0015] According to the distributed differential protection device provided by the utility model, the drying block comprises an activated alumina drying block.

[0016] According to the distributed differential protection device provided by the utility model, mounting plates are connected to both sides of the mounting shell, and fastening bolts and anti-loosening components are provided on the mounting plates. The anti-loosening components act on the fastening bolts to apply pressure to the fastening bolts.

[0017] According to the distributed differential protection device provided by the utility model, a fixing groove is provided on the mounting plate;

[0018] The anti-loosening component comprises:

[0019] A telescopic rod is arranged in the fixing groove, at least one end of the telescopic rod is fixedly connected with an anti-loosening rod, and one end of the anti-loosening rod abuts against the end of the fastening bolt;

[0020] A return spring is sleeved on the telescopic rod, and the return spring is used to apply a force to the anti-loosening rod.

[0021] According to the distributed differential protection device provided by the utility model, a flexible portion is fixedly connected to one end of the anti-loosening rod abutting against the fastening bolt, and the flexible portion is used to contact and abut against the fastening bolt.

[0022] According to the distributed differential protection device provided by the utility model, the flexible part is a rubber pad, and the rubber pad is a right-angled trapezoidal structure.

[0023] According to the distributed differential protection device provided by the utility model, a handle portion is connected to the anti-loosening rod.

[0024] According to any of the above embodiments, the utility model has at least the following beneficial effects:

[0025] The utility model provides a distributed differential protection device, which realizes drying of the internal space of the shell by arranging a drying component on the side wall of the installation shell, so that the device can operate normally even if it is installed in an environment with heavy humidity, thereby improving its applicability and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 It is a main structural schematic diagram of the distributed differential protection device provided by the utility model;

[0028] Figure 2 It is a schematic diagram of the internal structure of the distributed differential protection device provided by the utility model;

[0029] Figure 3 It is a schematic diagram of the side section structure of the distributed differential protection device provided by the utility model;

[0030] Figure 4 The utility model provides Figure 2 A magnified view of the structure at center A;

[0031] Figure 5 It is a partial structural schematic diagram of the connection of the anti-loosening components in the distributed differential protection device provided by the utility model;

[0032] Figure 6 It is a structural schematic diagram of an anti-loosening rod in a distributed differential protection device provided by the utility model.

[0033] Reference numerals:

[0034] 10. Differential protection module; 101. Panel; 102. Control mainboard; 1021. Single chip microcomputer module; 1022. 5G CPE module; 1023. Wireless data transmitter module;

[0035] 20. Install the housing; 201. Install the chamber;

[0036] 30. Anti-loosening assembly; 301. Fixing groove; 3011. Limiting platform; 302. Telescopic rod; 303. Return spring; 304. Anti-loosening rod; 305. Handle; 306. Flexible part; 307. Limiting head;

[0037] 40. Mounting plate;

[0038] 50, drying assembly; 501, drying seat; 502, drying chamber; 503, drying block; 504, sealing plate; 505, sealing ring;

[0039] 60. Tighten the bolts. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0042] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0043] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0045] With the continuous development of network communications in my country, 5G communication technology has been widely used in our daily life and industrial production, bringing great convenience to our daily life and industrial production. CPE (Customer Premises Equipment) is a mobile signal access device that receives mobile signals and forwards them as wireless WiFi signals. It can be well used in conjunction with 5G network communications, and this technology is also widely used in distribution networks.

[0046] Among them, the differential protection device is an important electrical protection mechanism used to detect phase-to-phase short circuits and ground faults in the circuit, and to prevent these faults from causing damage to equipment and personnel. The differential protection mechanism is usually composed of a differential protection device and a corresponding current transformer. Its working principle is to detect whether there is a fault by comparing the current entering and leaving the circuit. When arranging CPE, it is often necessary to arrange it in an environment with heavy humidity. The internal components of the differential protection device in the related technology are affected by the influence of moisture, which makes it difficult for the components to work normally, affects the service life of the device, and increases the layout cost.

[0047] In view of the problems in the related technology, the following Figure 1-Figure 4The utility model describes a distributed differential protection device, which is used for layer 2 networking of 5G CPE, and specifically includes a differential protection module 10, a mounting shell 20, and a drying component 50. The differential protection module 10 is used to realize the differential protection function, so that it can perform differential protection on the data of the wireless data device. The interior of the mounting shell 20 defines an installation chamber 201, and the differential protection module 10 is installed in the installation chamber 201. A drying component 50 is provided on at least one side wall of the mounting shell 20, and the drying component 50 is connected to the installation chamber 201, and the drying component 50 is used to dry the installation chamber 201. The differential protection module 10 has a plurality of electronic components, and the electronic components will be affected in a humid environment and are easily corroded, resulting in device failure. The CPE device faces various complex environments during installation, and in some scenarios, the device needs to be installed in a humid environment. In this embodiment, by setting a drying component 50 on the side wall forming the installation chamber 201, the drying component 50 can process and dry the moisture in the installation chamber 201, so that the device can operate normally even in a humid environment, thereby improving the applicability of the device and increasing the service life of the device by drying the internal space of the device.

[0048] It can be understood that the installation housing 20 is the main body of the device, the differential protection module 10 is installed in the installation chamber 201, and the installation chamber 201 is formed in the middle of the installation housing 20. By arranging the drying component 50 on the side wall and making the drying component 50 communicate with the internal installation chamber 201, the internal space can be dried. Arranging on the side wall can make the overall structure more compact, and can facilitate the layout of the drying component 50.

[0049] In specific configuration, the installation housing 20 has a plurality of side walls, and the plurality of side walls define an installation chamber 201. During installation, the differential protection module 10 is installed in the installation chamber 201 and connected to an external power source through a wire or the like. In this embodiment, the number of drying components 50 is not limited, and one or more drying components 50 may be installed on each side wall, and the internal space can be dried by the plurality of drying components 50.

[0050] In a specific example, the differential protection module 10 includes a panel 101 and a control mainboard 102. The panel 101 is connected to the opening of the installation chamber 201, and the control mainboard 102 is connected to the installation chamber 201. The panel 101 is arranged so that the control mainboard 102 will not be directly exposed to the air in a large area, and the panel 101 and the control mainboard 102 are electrically connected. The control mainboard 102 has a single-chip microcomputer module 1021, a 5G CPE module 1022, a wireless data transmitter module 1023 and other components. Each component is arranged on a printed circuit board and is electrically connected through printed wires to form the control mainboard 102 body. When drying, it is possible to avoid excessive moisture from accumulating in the installation chamber 201, and the installation chamber 201 can be dried in time, thereby improving the service life of the device.

[0051] According to an embodiment provided by the utility model, the drying assembly 50 includes a drying seat 501 and a drying block 503. The drying seat 501 is fixedly connected to the side wall to form a drying chamber 502. The bottom wall of the drying chamber 502 is provided with a connecting hole so that the drying chamber 502 is connected with the installation chamber 201. The drying block 503 is arranged in the drying chamber 502 so as to absorb moisture in the installation chamber 201 through the drying block 503. The drying block 503 needs to contact with the space inside the installation chamber 201 so as to achieve drying of the space inside the installation chamber 201 through the drying block 503. In this embodiment, by providing a connecting hole on the bottom wall of the drying chamber 502, the connecting hole is used to connect the installation chamber 201 with the drying chamber 502, so that the drying block 503 can achieve direct contact with the air in the installation chamber 201, thereby achieving drying of the air in the installation chamber 201.

[0052] It can be understood that the drying seat 501 is fixedly connected to the side wall of the installation chamber 201, and the drying chamber 502 is formed by the connected drying seat 501 and the side wall. The bottom wall of the drying chamber 502 is the side wall of the installation chamber 201, and the two chambers are connected by opening a connecting hole on the bottom wall. In this way, the space of the device can be saved, making the overall structure of the device more compact.

[0053] According to an embodiment provided by the utility model, the drying assembly 50 further includes a sealing plate 504, which is detachably connected to the drying seat 501 and is used to seal the drying chamber 502. The adsorption capacity of the drying block 503 will be reduced or even fail after long-term use. In this embodiment, the sealing plate 504 is detachably connected to the drying seat 501 so that the sealing plate 504 is easy to disassemble, thereby enabling quick regeneration or replacement of the drying block 503.

[0054] It can be understood that the sealing plate 504 is connected to the drying seat 501 in a detachable manner, which facilitates the disassembly and assembly of the sealing plate 504. The removal of the sealing plate 504 can realize the removal and placement of the drying block 503 in the drying chamber 502, reducing the difficulty of replacing or regenerating the drying block 503.

[0055] In the specific configuration, a sealing ring 505 is further provided between the sealing plate 504 and the drying seat 501. If the drying block 503 is exposed to the external environment, the consumption of the drying block 503 will be accelerated. In this embodiment, the drying chamber 502 is isolated from the external environment by the provision of the sealing ring 505, so that the drying block 503 is prevented from being directly exposed to the external air, thereby increasing the service life of the drying block 503 and reducing the use cost.

[0056] In a specific example, the sealing ring 505 is a disc-shaped structure, the cross-sectional area of ​​the sealing ring 505 is equal to the opening area of ​​the drying chamber, and the sealing ring 505 can cover the cross-sectional area of ​​the entire drying chamber 502 . The setting of the sealing ring 505 can improve the sealing performance of the drying chamber 502 .

[0057] In the specific configuration, the sealing plate 504 is connected to the drying seat 501 by bolts. The sealing plate 504 can be detachably connected to the drying seat 501 by the bolt connection.

[0058] It can be understood that, in the present embodiment, the sealing plate 504 is connected by bolts, that is, the sealing plate 504 is installed and removed by removing the bolts, which is convenient and easy to prepare.

[0059] In a specific application, the middle part of the sealing plate 504 is configured as a raised part, and the edge of the sealing plate 504 has an edge part around it, and the contour of the raised part matches the outer contour of the drying chamber 502. During installation, the outer wall surface of the surrounding side of the raised part fits the inner wall surface of the drying chamber 502, and a plurality of fixing holes are provided on the edge part, through which bolts are connected to the drying seat 501. Through the provision of the raised part, it can be pre-positioned with the drying chamber 502 through the raised part during installation, and then connected with the fixing holes through the bolts, which is convenient for quick assembly.

[0060] It can be understood that the air inside the installation chamber 201 is dried and dehumidified by the drying block 503 to avoid excessive moisture accumulation inside and affect the normal operation of the internal electronic components. At the same time, the sealing plate 504 can be installed and disassembled by utilizing the coordination of the bolts and the fixing holes, thereby facilitating the replacement of the drying block 503 to avoid the inconvenience of subsequent drying and dehumidification caused by its adsorption saturation, thereby ensuring its long-term and stable drying and dehumidification effect.

[0061] According to an embodiment provided by the utility model, the installation housing 20 has a first side wall and a second side wall arranged opposite to each other, and the first side wall and the second side wall are both provided with a drying assembly 50. Generally, the installation chamber 201 in the installation housing 20 has limited space, and the excessive installation of drying assemblies 50 will increase the cost of the device and increase the difficulty and cost of subsequent maintenance. In this example, by respectively arranging drying assemblies 50 on two opposite sides, the internal space of the installation chamber 201 can be fully dried, and the overall cost of the device can be reduced, and the difficulty of subsequent maintenance can be reduced.

[0062] According to the distributed differential protection device provided by the utility model, the drying block 503 includes an activated alumina drying block 503. The activated alumina drying block 503 has a large specific surface area, can efficiently absorb moisture in the air, has excellent moisture absorption capacity, and can be regenerated by heating or ventilation after moisture absorption, removes the absorbed moisture, restores the dry state, can be reused multiple times, has a long service life, and reduces the use cost.

[0063] According to an embodiment provided by the utility model, Figure 1-Figure 2 as well as Figure 5-Figure 6 As shown, mounting plates 40 are provided on both sides of the mounting housing 20, and fastening bolts 60 and anti-loosening components 30 are provided on the mounting plates 40. The anti-loosening components 30 act on the fastening bolts 60 to apply pressure to the fastening bolts 60. In the related art, the differential protection device is installed and fixed by bolts, but the threads of the bolts will loosen after long-term use, and this loosening will affect the firmness and stability of the installation of the differential protection mechanism body, thereby affecting its normal use. In this embodiment, by arranging the anti-loosening component 30 on the mounting plate 40, the bolts are pre-tightened by the anti-loosening component 30, thereby improving the stability of the bolt connection.

[0064] It can be understood that applying pressure to the bolt through the anti-loosening component 30 is equivalent to applying a pre-tightening force to the bolt in real time, thereby effectively preventing the bolt thread from loosening, and the additional anti-loosening component 30 can facilitate the disassembly and installation of the fastening bolt 60.

[0065] In specific configuration, the anti-loosening assembly 30 includes a fixing slot 301, a telescopic rod 302 and a return spring 303. The fixing slot 301 is provided on the mounting plate 40, the telescopic rod 302 is provided in the fixing slot 301, at least one end of the telescopic rod 302 is fixedly connected with an anti-loosening rod 304, one end of the anti-loosening rod 304 abuts against the end of the fastening bolt 60; the return spring 303 is sleeved on the telescopic rod 302, and the return spring 303 is used to apply a force to the anti-loosening rod 304. The fastening bolt 60 can effectively prevent loosening under external pressure. In this embodiment, the anti-loosening rod 304 abuts against the end of the bolt to achieve pressure on the bolt, thereby preventing the bolt from loosening and improving the stability of the device connection.

[0066] It can be understood that the telescopic rod 302 has a tendency to extend under the elastic force of the return spring 303. Under the action of this tendency, the anti-loosening rod 304 is located at one end of the fixing groove 301, and the end of the anti-loosening rod 304 can continue to abut against the fastening bolt 60, effectively preventing the bolt from loosening.

[0067] In the specific configuration, one or more fastening bolts 60 may be provided on the mounting plate 40 on one side to achieve the fixation of the device installation. In this specification, two fastening bolts 60 are used as an example for description. It should be noted that the description of the number of fastening bolts 60 and anti-loosening rods 304 in the following embodiments should not be understood as limiting their number.

[0068] like Figure 2 As shown, two spaced apart fastening bolts 60 are provided on the mounting plate 40 on one side, a fixing groove 301 is provided between the two fastening bolts 60, and the anti-loosening assembly 30 is provided in the fixing groove 301. Specifically, the telescopic rod 302 is provided in the fixing groove 301, and anti-loosening rods 304 are provided at both ends of the telescopic rod 302, and a return spring 303 is sleeved on the outside of the telescopic rod 302. Under the action of the return spring 303, the two anti-loosening rods 304 can telescopically slide along the fixing groove 301, and the two anti-loosening rods 304 can act on the fastening bolts 60 on their own side to realize pre-tightening of the fastening bolts 60.

[0069] It is understandable that the anti-loosening rods 304 provided at both ends can simultaneously realize the pre-tightening of the fastening bolts 60 at both ends under the total use of the return spring 303, thereby improving the stability of the device connection. Of course, in some examples, the anti-loosening rod 304 can be connected only at one end. When the anti-loosening rod 304 is connected at one end, one end of the telescopic rod 302 is connected to the side wall of the fixing groove 301, and the other end of the telescopic rod 302 is connected to the anti-loosening rod 304. Similarly, the return spring 303 is sleeved on the telescopic rod 302 to realize the pushing of the anti-loosening rod 304.

[0070] When setting specific Figure 2 , Figure 6As shown, the anti-loosening rod 304 is roughly an "L"-shaped structure, one end of which is connected to the end of the telescopic rod 302, and the other end is abutted against the fastening bolt 60. In a specific application, the fixing groove 301 has a limit platform 3011 on both side walls along the telescopic direction of the telescopic rod 302, and the anti-loosening rod 304 has a limit head 307 at the connection between the telescopic rod 302 and the anti-loosening rod 304. In a normal state, the reset spring 303 drives the anti-loosening rod 304 to extend and retract to both sides, so that the upper limit head 307 of the anti-loosening rod 304 cooperates with the limit platform 3011 to limit, thereby improving the stability of the anti-loosening structure. When disassembly is required, the anti-loosening assembly 30 is disassembled by moving the anti-loosening rods 304 at both ends toward each other, so that the limit head 307 is separated from the limit platform 3011.

[0071] According to an embodiment of the present invention, a flexible portion 306 is fixedly connected to one end of the anti-loosening rod 304 that abuts against the fastening bolt 60, and the flexible portion 306 is used to contact and abut against the fastening bolt 60. During the abutment process, if it is a rigid contact, it is inevitable that the thread on the bolt will be damaged, which will be detrimental to the disassembly and reuse of the fastening bolt 60. In this embodiment, the flexible portion 306 is used to abut against the fastening bolt 60 to prevent damage to the fastening bolt 60 while pre-tightening the fastening bolt 60.

[0072] When setting specific Figure 5 , Figure 6 The flexible portion 306 is a rubber pad, which is a right-angled trapezoidal structure, and the inclined surface of the rubber pad intersects with the end surface of the anti-loosening rod 304. The selection of the rubber pad can make it more wear-resistant, and the rubber itself is waterproof, and can maintain stability in a humid environment and is not easily deformed by moisture. By setting it as a right-angled trapezoidal structure, the inclined surface is initially in contact with the fastening bolt 60, which is conducive to the movement of the anti-loosening rod 304, so that when the anti-loosening rod 304 returns to its original position, it can be deformed and pressed against one end of the fastening bolt 60, thereby achieving a firm limit and tightening of the fastening bolt 60 and improving its anti-loosening effect.

[0073] In a specific example, a handle portion 305 is connected to the anti-loosening rod 304. The handle portion 305 is connected to the end of the telescopic rod 302 by welding, and the anti-loosening rod 304 is easily moved by the arrangement of the handle portion 305.

[0074] In specific use, by toggling the handle 305, the anti-loosening rod 304 slides to drive the limit head 307 to slide in the fixing groove 301, and the compression reset spring 303 is placed at a suitable position, and then the fastening bolt 60 can be inserted into the reserved hole on the mounting plate 40 and tightened to achieve the installation and fixation of the differential protection device. Next, the handle 305 is loosened, and the elastic force of the reset spring 303 is used to make the limit head 307 slide to drive the anti-loosening rod 304 to slide, and the deformation of the rubber pad is used to make one end of the anti-loosening rod 304 firmly limit and press the end of the fastening bolt 60, so as to avoid the possible loosening of the thread of the fastening bolt 60 and ensure the long-term, firm and stable installation of the differential protection device.

[0075] After that, the corresponding wire is inserted into the differential protection module 10, and the other end thereof is connected to the corresponding control device, and then the differential protection module can be controlled to achieve good protection selectivity, and the wireless data transmitter body and the 5G CPE body can be used to achieve 5G remote stable signal transmission. At the same time, during the normal operation of the differential protection module 10, one side of the drying seat 501 is connected to the installation chamber 201 inside the installation shell 20, and then the activated alumina drying block 503 can dry and dehumidify the air inside the differential protection module 10 to avoid excessive accumulation of moisture inside it, which affects the normal operation of its internal electronic devices.

[0076] Moreover, the sealing plate 504 can be opened by turning the bolts regularly to replace the activated alumina drying block 503 to avoid the inconvenience of subsequent drying and dehumidification caused by its adsorption saturation. At the same time, during installation, the new activated alumina drying block 503 is placed in the drying chamber 502 in the drying seat 501 and then sealed by the sealing plate 504. Furthermore, when the sealing plate 504 is installed, the sealing ring 505 can be used to improve the sealing performance between the sealing plate 504 and the drying seat 501.

[0077] Through the description of the above implementation mode, those skilled in the art can clearly understand that the device can realize drying and dehumidification of the inside of the differential protection module 10, avoid excessive moisture accumulation inside it and affect the normal operation of its internal electronic components, and avoid adverse effects on the protection selectivity of the differential protection module 10. At the same time, the fastening bolts 60 on the mounting plate 40 can be limited and tightened to prevent the threads from loosening and causing the differential protection device to be installed loosely, thereby facilitating its normal and stable use.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A distributed differential protection device, characterized in that: include: Differential protection module; An installation housing defines an installation chamber, wherein the differential protection module is installed in the installation chamber; The drying component is arranged on at least one side wall of the installation shell, and the drying component is communicated with the installation chamber.

2. The distributed differential protection device according to claim 1, characterized in that: The drying component comprises: A drying seat, fixedly connected to the side wall to form a drying chamber, wherein the side wall has a connecting hole to connect the drying chamber with the installation chamber; A drying block is disposed in the drying chamber so as to absorb moisture in the installation chamber through the drying block.

3. The distributed differential protection device according to claim 2, characterized in that: The drying assembly further comprises a sealing plate, which is detachably connected to the drying seat and is used for sealing the drying chamber.

4. The distributed differential protection device according to claim 3, characterized in that: A sealing ring is also arranged between the sealing plate and the drying seat.

5. The distributed differential protection device according to claim 2, characterized in that: The installation shell has a first side wall and a second side wall that are opposite to each other, and the first side wall and the second side wall are both provided with the drying assembly.

6. The distributed differential protection device according to claim 2, characterized in that: The desiccant blocks include activated alumina desiccant blocks.

7. The distributed differential protection device according to any one of claims 1 to 6, characterized in that: Both sides of the mounting shell are connected with mounting plates, and the mounting plates are provided with fastening bolts and anti-loosening components, and the anti-loosening components act on the fastening bolts to apply pressure to the fastening bolts.

8. The distributed differential protection device according to claim 7, characterized in that: The mounting plate is provided with a fixing groove; The anti-loosening component comprises: A telescopic rod is arranged in the fixing groove, at least one end of the telescopic rod is fixedly connected with an anti-loosening rod, and one end of the anti-loosening rod abuts against the end of the fastening bolt; A return spring is sleeved on the telescopic rod, and the return spring is used to apply a force to the anti-loosening rod.

9. The distributed differential protection device according to claim 8, characterized in that: A flexible portion is fixedly connected to one end of the anti-loosening rod abutting against the fastening bolt, and the flexible portion is used for contacting and abutting against the fastening bolt.

10. The distributed differential protection device according to claim 9, characterized in that: The flexible portion is a rubber pad, and the rubber pad is a right-angled trapezoidal structure.

11. The distributed differential protection device according to claim 8, characterized in that: The anti-loosening rod is connected with a handle portion.

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