CN214623526U - Network security server - Google Patents

Abstract

The utility model provides a network security server, including quick-witted case, power module, hard disk storage module, mainboard, keysets, several expansion card tray and system fan module. The front panel and the rear panel of the case are separated from the case body, the expansion card tray is used for installing the expansion cards, the expansion card tray is detachably installed on the front panel, a user can replace the expansion cards under the condition that the case is not detached, and various expansion cards can be mixed and inserted into various slot positions, so that the case is flexible and changeable. If the expansion card breaks down, the expansion card can be replaced only by pulling out the expansion card, and the use is convenient. On the other hand, the utility model discloses an each modular design to can change the function of expansion card according to the demand, can very easily realize the collocation of the required various configurations of server, need not change the function at every turn and just change the design, to a great extent reduce cost, also more nimble.

Description

Network security server

Technical Field

The utility model relates to a computer equipment field especially relates to a network security server.

Background

A server, also known as a server, is one type of computer that can provide computing services. Since the server needs to respond to and process the service request, the server generally has the capability of assuming and securing the service. The server is configured to include a processor, a hard disk, a memory, a system bus, and the like, and is similar to a general Computer architecture, but it is faster, higher in load, and more expensive than a general Computer, and provides a computing or application service for other clients (such as a PC (Personal Computer), a smart phone, an ATM (Automated Teller Machine), and other terminals, even a large-sized device such as a train system, in a network. The server has high-speed Central Processing Unit (CPU) computing capability, long-time reliable operation, strong input/output (I/O) external data throughput capability and better expansibility.

The network safety server is a special computer which can provide services such as centralized computation, information publishing, data management and the like for network users in a network environment. The layout and architecture of the network security server are quite mature at present, but the layout structure of the network security server is relatively fixed at present, when a user puts forward a new functional requirement, the layout needs to be re-arranged, and the re-design of the structure of the network security server is long in time consumption and high in cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a network security server can change the function of expansion card according to the user's needs to can change the expansion card under the condition of not tearing open quick-witted case, various expansion cards can be mixed in each trench and inserted, and are nimble changeable.

In order to achieve the above object, the utility model provides a network security server, which comprises a case, a power module, a hard disk storage module, a mainboard, a switching unit, a plurality of expansion card trays and a system fan module;

the case comprises a case body, a front panel, a rear panel and a cover plate; the box body is U-shaped and comprises a bottom plate, a first side wall and a second side wall, wherein the first side wall and the second side wall are respectively connected to two sides of the bottom plate; the front panel and the rear panel are respectively arranged at two ends of the box body; the cover plate is opposite to the bottom plate and is arranged on the first side wall and the second side wall;

the power module, the hard disk storage module, the mainboard, the switching unit, the plurality of expansion card trays and the system fan module are all positioned in the case;

the expansion card tray is used for installing an expansion card; the expansion card tray is detachably mounted on the front panel;

the switching unit is detachably arranged on the expansion card tray;

the switching unit is electrically connected with the mainboard and the expansion card, so that the mainboard is electrically connected with the expansion card, and the basic functions of the mainboard are expanded.

The expansion card tray is provided with an opening which is adapted to an external interface of the expansion card.

The mainboard is a standard mainboard; a vertical X16 PCIE slot is arranged on the mainboard close to the first side wall, and a horizontal X16 PCIE slot is arranged at one end of the mainboard close to the second side wall;

the expansion card is a standard expansion card and can be detachably and fixedly installed on the expansion card tray.

The basic functions of the mainboard comprise one or more of an indicator light, a USB interface, a network management interface, an electric port and an optical port;

the expansion card is a kilomega 8 electric port expansion card, a kilomega 4 optical port expansion card or a kilomega 2 optical port expansion card.

The switching unit is a first switching plate, a second switching plate, a third switching plate or a combination thereof;

the first adapter plate and the main board are arranged on the same layer;

one end of the first adapter plate, which is close to the mainboard, is provided with a bridge plate, and the bridge plate is matched with a horizontal X16 PCIE slot of the mainboard to realize the electrical connection with the mainboard; one end of the first adapter plate, which is close to the expansion card tray, is provided with two horizontal X8 PCIE slots which can be respectively and electrically connected with two expansion cards;

the second adapter plate is positioned on the upper layer of the main board;

a connecting plate is arranged between the second adapter plate and the main board, one end of the connecting plate is electrically connected with the second adapter plate, and the other end of the connecting plate is electrically connected with the main board through a vertical X16 PCIE slot; one end of the second adapter plate, which is close to the expansion card tray, is provided with three horizontal X8 PCIE slots which can be respectively and electrically connected with three expansion cards;

the first adapter plate is also provided with an adapter plate connector for electrically connecting with a third adapter plate; the third adapter board is provided with two vertical X8 PCIE slots which can be respectively and electrically connected with two expansion cards.

When the number of the expansion card trays is two, the expansion card trays are used for respectively installing two expansion cards; and the two expansion cards are respectively inserted into the two horizontal X8 PCIE slots of the first adapter plate, so that the expansion of the basic functions of the mainboard is realized.

When the number of the expansion card trays is three, the expansion card trays are used for respectively installing three expansion cards; and the three expansion cards are respectively inserted into the three horizontal X8 PCIE slots of the second adapter plate, so that the expansion of the basic functions of the mainboard is realized.

When the number of the expansion card trays is four, the expansion card trays are used for respectively installing four expansion cards; the expansion card trays are arranged into an upper layer and a lower layer, and the number of the expansion card trays in each layer is two; the lower layer of expansion card tray and the main board are positioned on the same layer, and the upper layer of expansion card tray is positioned above the lower layer of expansion card tray;

the four expansion cards are respectively inserted into the two vertical X8 PCIE slots of the third adapter board and the two horizontal X8 PCIE slots of the first adapter board, so that the expansion of the basic functions of the motherboard itself is realized.

When the number of the expansion card trays is five, the expansion card trays are used for respectively installing five expansion cards; the expansion card trays are arranged into an upper layer and a lower layer, the number of the expansion card trays on the upper layer is three, and the number of the expansion card trays on the lower layer is two; the lower expansion card tray and the mainboard are positioned on the same layer, and the upper expansion card tray is positioned above the mainboard;

and five expansion cards are respectively inserted into the three horizontal X8 PCIE slots of the second adapter plate and the two horizontal X8 PCIE slots of the first adapter plate, so that the expansion of the basic functions of the mainboard is realized.

When the number of the expansion card trays is seven, the expansion card trays are used for respectively installing seven expansion cards; the expansion card trays are arranged into an upper layer and a lower layer, the number of the expansion card trays on the upper layer is five, and the number of the expansion card trays on the lower layer is two;

the expansion card tray and the main board on the lower layer are positioned on the same layer; in the expansion card tray on the upper layer, three expansion card trays close to the first side wall are positioned above the main board, and two expansion card trays close to the second side wall are positioned above the expansion card tray on the lower layer;

seven expansion cards are respectively inserted into three horizontal X8 PCIE slots of the second adapter plate, two vertical X8 PCIE slots of the third adapter plate and two horizontal X8 PCIE slots of the first adapter plate, so that the expansion of the basic functions of the mainboard is realized.

The utility model has the advantages that: the utility model provides a pair of network security server, including quick-witted case, power module, hard disk storage module, mainboard, switching unit, several expansion card tray and system fan module. The chassis comprises a box body, a front panel, a rear panel and a cover plate, wherein the front panel and the rear panel are separated from the box body by the chassis, the expansion card tray is used for installing the expansion cards, the expansion card tray is detachably installed on the front panel, a user can replace the expansion cards under the condition that the chassis is not detached, and various expansion cards can be mixed and inserted in various slot positions and are flexible and changeable. If the expansion card breaks down, the expansion card can be replaced only by pulling out the expansion card, and the use is convenient. On the other hand, the utility model discloses an each modular design to can change the function of expansion card according to the demand, can very easily realize the collocation of the required various configurations of server, need not change the function at every turn and just change the design, to a great extent reduce cost, also more nimble.

Drawings

For a better understanding of the features and technical content of the present invention, reference should be made to the following detailed description of the present invention and accompanying drawings, which are provided for the purpose of illustration and description and are not intended to limit the present invention.

In the drawings, there is shown in the drawings,

fig. 1 is a schematic plan view of the network security server of the present invention;

fig. 2 is a partial perspective exploded view of the network security server of the present invention;

FIG. 3 is a three-dimensional exploded view of the expansion card of the present invention when the expansion card is a gigabit 8 electric outlet expansion card, connected to an expansion card tray;

FIG. 4 is a three-dimensional exploded view of the expansion card of the present invention when it is a gigabit 4 electric outlet expansion card, connected to an expansion card tray;

FIG. 5 is a schematic perspective exploded view of the extended card of the present invention when it is a gigabit 4 optical port extended card, connected to an extended card tray;

FIG. 6 is a schematic perspective exploded view of the expansion card of the present invention when it is a gigabit 2 optical port expansion card, connected to an expansion card tray;

fig. 7 is a schematic perspective view of the network security server of the present invention;

fig. 8 is a schematic diagram of a first embodiment of a front panel in the network security server of the present invention;

fig. 9 is a schematic diagram of a second embodiment of a front panel in the network security server of the present invention;

fig. 10 is a schematic diagram of a third embodiment of a front panel in the network security server of the present invention;

fig. 11 is a schematic diagram of a fourth embodiment of a front panel in the network security server of the present invention;

fig. 12 is a schematic diagram of a fifth embodiment of a front panel in the network security server of the present invention.

Detailed Description

To further illustrate the technical means and effects of the present invention, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Referring to fig. 1 to 12, the present invention provides a network security server, which includes a case 1, a power module 2, a hard disk storage module 3, a motherboard 4, a switching unit 5, a plurality of expansion card trays 6, and a system fan module 7.

Specifically, the chassis 1 includes a box body 11, a front panel 12, a rear panel 13, and a cover plate 14; the box body 11 is U-shaped, and the box body 11 includes a bottom plate 110, and a first side wall 111 and a second side wall 112 respectively connected to two sides of the bottom plate 110; the front panel 12 and the rear panel 13 are respectively arranged at two ends of the box body 11; the cover plate 14 is mounted on the first side wall 111 and the second side wall 112 opposite to the bottom plate 110.

Specifically, the power module 2, the hard disk storage module 3, the motherboard 4, the switching unit 5, the plurality of expansion card trays 6, and the system fan module 7 are all located in the chassis 1.

Specifically, the power module 2 and the main board 4 are sequentially arranged along a direction away from the rear panel 13 and close to the first side wall 111 of the box 11; the system fan module 7 and the hard disk storage module 3 are sequentially arranged along a direction away from the back panel 13 and close to the second side wall 112 of the box body 11.

Optionally, the system fan module 7 is mounted on the back panel 13.

Specifically, the expansion card tray 6 is used for mounting expansion cards 62; the expansion card tray 6 is detachably attached to the front panel 12, and thus can be replaced at any time, as shown in fig. 7.

Optionally, the expansion card tray 6 and the front panel 12 are mounted by screws.

Specifically, the expansion card tray 6 is provided with an opening 61, the shape and size of the opening 61 are determined according to the function of the expansion card 62, and only the opening 61 is required to be adapted to the external interface 621 of the expansion card 62.

Specifically, the system fan module 7 can ensure heat dissipation of the power module 2, the hard disk storage module 3, and the motherboard 4.

The power module 2 is electrically connected with the mainboard 4, so as to supply power to the mainboard 4.

The main board 4 has basic functions, such as an indicator light, a USB interface, a network management interface, an electrical port, an optical port, and the like. Of course, the basic function of the main board 4 is determined according to the requirement of the user, and the present invention does not limit this.

The switching unit 5 is electrically connected with the main board 4 and the expansion card 62, so that the main board 4 is electrically connected with the expansion card 62, and the basic functions of the main board 4 are expanded.

It should be noted that, because the expansion card tray is used for installing the expansion card, and the expansion card tray is detachably installed on the front panel, the user can replace the expansion card without detaching the chassis, and various expansion cards can be mixed and inserted in various slot positions, which is flexible and changeable. If the expansion card breaks down, the expansion card can be replaced only by pulling out the expansion card, and the use is convenient.

The utility model discloses an each modular design to according to the function of demand change expansion card, can very easily realize the collocation of the required various configurations of server, need not change the function at every turn and just change the design, to a great extent reduce cost, also more nimble.

Specifically, the motherboard 4 is a standard-type motherboard, i.e., atx (advanced Technology extended) motherboard, commonly referred to as "large board", and has a size of 305mm × 244 mm. A vertical X16 PCIE (peripheral component interconnect express, high-speed serial computer expansion bus) slot 41 is disposed on the motherboard 4 near the first sidewall 111; one end of the motherboard 4 close to the second sidewall 112 is provided with a horizontal X16 PCIE slot 42.

Further, the expansion card 62 can be detachably and fixedly mounted on the expansion card tray 6, and the expansion card 62 is a standard expansion card (PCIE card), that is, the size of the expansion card 62 is set to a standard size.

Optionally, the expansion card 62 and the expansion card tray 6 are fixed by screws. As shown in fig. 3, 4, 5, and 6, when the expansion card 62 is a gigabit 8 electric port expansion card, a gigabit 4 optical port expansion card, or a gigabit 2 optical port expansion card, the expansion card 62 is connected to the expansion card tray 6 in a three-dimensional exploded view.

Specifically, the adapter unit 5 is a first adapter plate 51, a second adapter plate 52, a third adapter plate 53 or a combination thereof;

the first adapter plate 51 and the main board 4 are arranged on the same layer;

one end of the first adapter plate 51, which is close to the motherboard 4, is provided with a bridge piece 511, which is matched with the horizontal X16 PCIE slot 42 of the motherboard 4 to realize electrical connection with the motherboard 4; one end of the first adapter plate 51, which is close to the expansion card tray 6, is provided with two horizontal X8 PCIE slots, which can be electrically connected to two expansion cards 62 respectively;

the second adapter board 52 is located at the upper layer of the main board 4;

a connecting plate 9 is arranged between the second adapter plate 52 and the main board 4, one end of the connecting plate 9 is electrically connected with the second adapter plate 52, and the other end is electrically connected with the main board 4 through a vertical X16 PCIE slot 41; one end of the second adapter plate 52 close to the expansion card tray 6 is provided with three horizontal X8 PCIE slots, which can be electrically connected to the three expansion cards 62 respectively;

the first adapter plate 51 is further provided with an adapter plate connector 512 for electrically connecting with the third adapter plate 53; the third interposer 53 is provided with two vertical X8 PCIE slots, which can be electrically connected to the two expansion cards 62 respectively.

Optionally, the interposer connector 512 may be two cpcie (compact PCIE) connectors, and is electrically connected to an end of the third interposer 53 away from the vertical X8 PCIE slot.

Fig. 8 is a schematic diagram of a first embodiment of a front panel in the network security server of the present invention, as shown in fig. 8, in the first embodiment, when there are two expansion card trays 6, the two expansion cards 62 are installed respectively, and the two expansion cards 62 are inserted into two horizontal X8 PCIE slots of the first adapter plate 51 respectively, so as to realize the extension of the basic functions of the motherboard 4 itself.

Fig. 9 is a schematic diagram of a second embodiment of a front panel in the network security server of the present invention, as shown in fig. 9, wherein when there are three expansion card trays 6, three expansion cards 62 are respectively installed in the second embodiment; the three expansion cards 62 are respectively inserted into the three horizontal X8 PCIE slots of the second interposer 52, so as to implement the expansion of the basic functions of the motherboard 4 itself.

Fig. 10 is a schematic diagram of a third embodiment of a front panel in the network security server of the present invention, as shown in fig. 10, wherein when there are four expansion card trays 6, four expansion cards 62 are respectively installed in the third embodiment; the expansion card trays 6 are arranged into an upper layer and a lower layer, and the number of each layer of expansion card tray 6 is two; the expansion card tray 6 on the lower layer is positioned on the same layer as the main board 4, and the expansion card tray 6 on the upper layer is positioned above the expansion card tray 6 on the lower layer.

The four expansion cards 62 are respectively inserted into the two vertical X8 PCIE slots of the third interposer 53 and the two horizontal X8 PCIE slots of the first interposer 51, so as to implement expansion of the basic functions of the motherboard 4 itself.

Fig. 11 is a schematic diagram of a fourth embodiment of a front panel in the network security server of the present invention, as shown in fig. 11, wherein in the fourth embodiment, when there are five expansion card trays 6, there are five expansion cards 62 installed respectively; the expansion card trays 6 are arranged into an upper layer and a lower layer, the number of the expansion card trays 6 on the upper layer is three, and the number of the expansion card trays 6 on the lower layer is two; the expansion card tray 6 on the lower layer is located on the same layer as the main board 4, and the expansion card tray 6 on the upper layer is located above the main board 4.

Five expansion cards 62 are respectively inserted into the three horizontal X8 PCIE slots of the second interposer 52 and the two horizontal X8 PCIE slots of the first interposer 51, so that the expansion of the basic functions of the motherboard 4 itself is realized.

Fig. 12 is a schematic diagram of a fifth embodiment of a front panel in the network security server of the present invention, as shown in fig. 12, wherein when the number of the expansion card trays 6 is seven, seven expansion cards 62 are respectively installed in the fifth embodiment; the expansion card tray 6 is arranged into an upper layer and a lower layer, the number of the expansion card tray 6 on the upper layer is five, and the number of the expansion card tray 6 on the lower layer is two.

The lower expansion card tray 6 and the main board 4 are positioned on the same layer; of the expansion card trays 6 on the upper layer, three expansion card trays 6 adjacent to the first side wall 111 are located above the main board 4, and two expansion card trays 6 adjacent to the second side wall 112 are located above the expansion card trays 6 on the lower layer.

Seven expansion cards 62 are respectively inserted into three horizontal X8 PCIE slots of the second interposer 52, two vertical X8 PCIE slots of the third interposer 53, and two horizontal X8 PCIE slots of the first interposer 51, so as to implement expansion of the basic functions of the motherboard 4 itself.

It should be noted that, in other embodiments, the expansion card 62 is not installed in each expansion card tray 6, that is, a part of the expansion card tray 6 may be left empty, and the functions of the expansion cards 62 of other expansion card trays 6 may not be affected. The user can select any number of expansion cards 62 according to the demand to realize the expansion of the basic functions of the main board 4, and the utility model discloses do not limit to this.

To sum up, the utility model provides a pair of network security server, including quick-witted case, power module, hard disk storage module, mainboard, keysets, several expansion card tray, and system fan module. The chassis comprises a box body, a front panel, a rear panel and a cover plate, wherein the front panel and the rear panel are separated from the box body by the chassis, the expansion card tray is used for installing the expansion cards, the expansion card tray is detachably installed on the front panel, a user can replace the expansion cards under the condition that the chassis is not detached, and various expansion cards can be mixed and inserted in various slot positions and are flexible and changeable. If the expansion card breaks down, the expansion card can be replaced only by pulling out the expansion card, and the use is convenient. On the other hand, the utility model discloses an each modular design to can change the function of expansion card according to the demand, can very easily realize the collocation of the required various configurations of server, need not change the function at every turn and just change the design, to a great extent reduce cost, also more nimble.

From the above, it is obvious to those skilled in the art that various other changes and modifications can be made according to the technical solution and the technical idea of the present invention, and all such changes and modifications should fall within the protective scope of the appended claims.

Claims (10)

1. A network security server is characterized by comprising a case (1), a power module (2), a hard disk storage module (3), a main board (4), a switching unit (5), a plurality of expansion card trays (6) and a system fan module (7);

the case (1) comprises a case body (11), a front panel (12), a rear panel (13) and a cover plate (14); the box body (11) is U-shaped, and the box body (11) comprises a bottom plate (110), a first side wall (111) and a second side wall (112) which are respectively connected to two sides of the bottom plate (110); the front panel (12) and the rear panel (13) are respectively arranged at two ends of the box body (11); the cover plate (14) is opposite to the bottom plate (110) and is arranged on the first side wall (111) and the second side wall (112);

the power module (2), the hard disk storage module (3), the mainboard (4), the switching unit (5), the plurality of expansion card trays (6) and the system fan module (7) are all positioned in the case (1);

the expansion card tray (6) is used for installing an expansion card (62); the expansion card tray (6) is detachably mounted on the front panel (12);

the switching unit (5) is detachably arranged on the expansion card tray (6);

the switching unit (5) is electrically connected with the main board (4) and the expansion card (62), so that the main board (4) is electrically connected with the expansion card (62), and further the basic functions of the main board (4) are expanded.

2. The network security server according to claim 1, wherein the expansion card tray (6) is provided with an opening (61), and the opening (61) is adapted to the external interface (621) of the expansion card (62).

3. The network security server according to claim 1, wherein the motherboard (4) is a standard type motherboard; a vertical X16 PCIE slot (41) is arranged on the main board (4) close to the first side wall (111), and a horizontal X16 PCIE slot (42) is arranged at one end of the main board (4) close to the second side wall (112);

the expansion card (62) is a standard expansion card, and the expansion card (62) can be detachably and fixedly arranged on the expansion card tray (6).

4. The network security server according to claim 3, wherein the basic functions of the mainboard (4) comprise one or more of an indicator light, a USB interface, a network management interface, an electric port and an optical port;

the expansion card (62) is a gigabit 8 electric port expansion card, a gigabit 4 optical port expansion card or a gigabit 2 optical port expansion card.

5. The network security server according to claim 3, wherein the patching unit (5) is a first patching board (51), a second patching board (52), a third patching board (53), or a combination thereof;

the first adapter plate (51) and the main board (4) are arranged on the same layer;

one end, close to the mainboard (4), of the first adapter plate (51) is provided with a bridge piece (511) which is matched with a horizontal X16 PCIE slot (42) of the mainboard (4) to realize the electrical connection with the mainboard (4); one end of the first adapter plate (51) close to the expansion card tray (6) is provided with two horizontal X8 PCIE slots which can be respectively and electrically connected with two expansion cards (62);

the second adapter plate (52) is positioned on the upper layer of the main plate (4);

a connecting plate (9) is arranged between the second adapter plate (52) and the main board (4), one end of the connecting plate (9) is electrically connected with the second adapter plate (52), and the other end of the connecting plate is electrically connected with the main board (4) through a vertical X16 PCIE slot (41); one end of the second adapter plate (52) close to the expansion card tray (6) is provided with three horizontal X8 PCIE slots which can be respectively and electrically connected with three expansion cards (62);

the first adapter plate (51) is also provided with an adapter plate connector (512) for electrically connecting with a third adapter plate (53); the third adapter plate (53) is provided with two vertical X8 PCIE slots which can be respectively and electrically connected with two expansion cards (62).

6. The network security server according to claim 5, wherein when there are two expansion card trays (6), there are two expansion cards (62) for installation; the two expansion cards (62) are respectively inserted into the two horizontal X8 PCIE slots of the first adapter board (51), so that the expansion of the basic functions of the mainboard (4) is realized.

7. The network security server according to claim 5, wherein when there are three expansion card trays (6), there are three expansion cards (62) installed, respectively; and the three expansion cards (62) are respectively inserted into the three horizontal X8 PCIE slots of the second adapter plate (52), so that the expansion of the self-contained basic functions of the mainboard (4) is realized.

8. The network security server according to claim 5, wherein when the number of the expansion card trays (6) is four, four expansion cards (62) are installed, respectively; the expansion card trays (6) are arranged into an upper layer and a lower layer, and the number of each layer of expansion card trays (6) is two; the lower expansion card tray (6) and the main board (4) are positioned on the same layer, and the upper expansion card tray (6) is positioned above the lower expansion card tray (6);

the four expansion cards (62) are respectively inserted into two vertical X8 PCIE slots of the third adapter plate (53) and two horizontal X8 PCIE slots of the first adapter plate (51), so that the expansion of the basic functions of the mainboard (4) is realized.

9. The network security server according to claim 5, wherein when the number of the expansion card trays (6) is five, there are provided five expansion cards (62) for installation; the expansion card trays (6) are arranged into an upper layer and a lower layer, the number of the expansion card trays (6) on the upper layer is three, and the number of the expansion card trays (6) on the lower layer is two; the expansion card tray (6) at the lower layer is positioned at the same layer as the main board (4), and the expansion card tray (6) at the upper layer is positioned above the main board (4);

five expansion cards (62) are respectively inserted into three horizontal X8 PCIE slots of the second adapter plate (52) and two horizontal X8 PCIE slots of the first adapter plate (51), so that the expansion of the basic functions of the mainboard (4) is realized.

10. The network security server according to claim 5, wherein when the number of the expansion card trays (6) is seven, seven expansion cards (62) are installed, respectively; the expansion card trays (6) are arranged into an upper layer and a lower layer, the number of the expansion card trays (6) on the upper layer is five, and the number of the expansion card trays (6) on the lower layer is two;

the expansion card tray (6) at the lower layer is positioned at the same layer as the main board (4); in the expansion card trays (6) on the upper layer, three expansion card trays (6) close to the first side wall (111) are positioned above the main board (4), and two expansion card trays (6) close to the second side wall (112) are positioned above the expansion card trays (6) on the lower layer;

seven expansion cards (62) are respectively inserted into three horizontal X8 PCIE slots of the second adapter plate (52), two vertical X8 PCIE slots of the third adapter plate (53) and two horizontal X8 PCIE slots of the first adapter plate (51), so that the expansion of the self-contained basic functions of the mainboard (4) is realized.

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