Cabinet placement structure of data center machine room

By designing the L-shaped placement rack and clamping structure, the problems of low installation efficiency and safety hazards of cabinets in the data center computer room are solved, and more efficient and stable cabinet installation and position adjustment are achieved.

CN222116861UActive Publication Date: 2024-12-06WUHAN JIAYUCAN TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202420573804.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-22
Publication Date
2024-12-06
Estimated Expiration
2034-03-22

AI Technical Summary

Technical Problem

In data center computer rooms, traditional cabinet installation methods are inefficient and have safety risks, especially when it is difficult to use a crane for position adjustment inside built data centers.

Method used

A cabinet placement structure including an L-shaped mounting frame, an extension rod, a suction cup, an operating rod and a ball were designed. Through the combination of horizontal plate and longitudinal plate, the expansion of the extension rod and the suction cup are used to form a clamping structure. , improve the stability and installation efficiency of the cabinet.

Benefits of technology

It improves the installation efficiency and stability of the cabinet, reduces the shaking of the cabinet when it moves, enhances the coordination stability between the installation rack and the cabinet, adapts to the needs of different installation positions, and is more flexible and safe than traditional board cars.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a cabinet placement structure of a data center machine room, which comprises a placement frame, an extension rod, a first electric cylinder, a baffle assembly, a sucker, an operating rod, a ball and a chamfering structure, the placement frame is composed of a horizontal plate and a longitudinal plate and forms an L shape, the ball is rotatably mounted at the bottom end of the horizontal plate, and the chamfering structure is arranged on the front side of the horizontal plate. The arrangement frame is convenient to operate through the operating rod, the horizontal plate can more smoothly slide into the bottom of the cabinet under the action of the balls, meanwhile, the overall mobility can be improved, the arrangement frame can be conveniently subjected to position adjustment and steering under the action of the operating rod, the installation position of the cabinet is better combined for adjustment, and compared with a traditional plate trailer, the plate trailer has the advantages of being convenient to use and high in practicability. According to the plate trailer, the placement frame can be better inserted into the bottom of the cabinet, meanwhile, the rotation angle of the balls is more flexible relative to the rolling wheels on the plate trailer, and the matching stability between the placement frame and the cabinet can be improved under the matching of the baffle assembly and the suction cups.
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Description

Technical Field

[0001] The utility model relates to the technical field of data center computer rooms, in particular to a cabinet placement structure of a data center computer room. Background Art

[0002] The most commonly used equipment carrier in the data center computer room is the cabinet. The cabinet is an indispensable component for carrying electrical equipment and is used to control the operation of electrical equipment. It is made of cold-rolled steel plates or alloys and is mainly divided into server cabinets, network cabinets and console cabinets. In the data center computer room, the placement and subsequent maintenance of the cabinets are necessary factors to ensure the normal use of the cabinets. In addition, due to the heavy weight of the cabinet itself and different requirements for the installation position of different cabinets in the data center computer room, some placement structures are needed to assist the cabinet in moving and installing inside the data center computer room. The traditional installation method is to adjust the position and install it manually by adding a pallet truck. Although this method can solve the problem, it is not efficient and there are safety hazards. It is difficult to use a crane inside the built data center computer room. Therefore, a convenient installation structure is still needed to adjust the installation position of the cabinet inside the data center computer room and improve the installation efficiency. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] In view of the deficiencies of the prior art, the utility model provides a cabinet placement structure for a data center computer room to solve the problem of inconvenience in cabinet installation in the prior art mentioned in the background art.

[0005] (II) Technical solution

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A cabinet placement structure of a data center computer room includes a placement frame, wherein the placement frame is composed of a horizontal plate and a longitudinal plate and forms an L shape, and further includes:

[0008] An extension rod, wherein at least two groups of slide grooves are symmetrically arranged on the horizontal plate, and the extension rod is slidably installed inside each slide groove;

[0009] A first electric cylinder, wherein the first electric cylinder is arranged horizontally with the extension rod, and an output end of the first electric cylinder is connected to one end of the extension rod;

[0010] Wherein, a slot structure suitable for installing the first electric cylinder is arranged on the horizontal plate;

[0011] A baffle assembly, wherein the baffle assembly is rotatably disposed on the extension rod;

[0012] A suction cup, the suction cup being mounted on the inner side wall of the longitudinal plate;

[0013] An operating rod, the operating rod is mounted on the longitudinal plate and is used to operate the placement frame;

[0014] A ball bearing, the ball bearing being rotatably mounted on the bottom end of the horizontal plate;

[0015] A chamfered structure is provided on the front side of the horizontal plate.

[0016] Furthermore, the baffle assembly includes:

[0017] An adjustment slot, the adjustment slot being arranged on the extension rod;

[0018] a baffle, the baffle being rotatably disposed in the adjustment slot;

[0019] An elastic member, the elastic member is arranged on a side of the baffle plate and the adjusting slot away from the first electric cylinder, and is used to pull the baffle plate to a state perpendicular to the adjusting slot;

[0020] A flattening structure is provided between the extension rod and the baffle plate and is used for flattening the baffle plate.

[0021] Furthermore, the flattening structure includes:

[0022] A second electric cylinder, wherein a mounting cavity is provided inside the extension rod, and the second electric cylinder is mounted inside the mounting cavity;

[0023] A pull rope, a stretching groove is provided between the installation cavity and the adjustment groove, and the pull rope is arranged in the stretching groove;

[0024] A slideway, the slideway is T-shaped and is obliquely arranged on the inner side of the baffle;

[0025] A rolling ball is located in the slideway, one end of the pull rope is connected to the rolling ball, and the other end of the pull rope is connected to the output end of the second electric cylinder.

[0026] Furthermore, it also includes a lifting structure, which includes:

[0027] A bottom plate, wherein a placement groove is provided at the bottom of the horizontal plate, and the bottom plate is arranged in the placement groove;

[0028] A third electric cylinder is longitudinally mounted in the longitudinal plate, and a bottom output end of the third electric cylinder is connected to the top of the bottom plate;

[0029] A slide rod, the slide rod is longitudinally connected to the top of the bottom plate, and the longitudinal plate is provided with a slide hole suitable for sliding fit of the slide rod;

[0030] A reinforcing plate, the reinforcing plate being installed between the bottom plate and the bottom output end of the third electric cylinder;

[0031] Wherein, the bottom of the bottom plate is also provided with the ball bearings which are flush with the bottom of the horizontal plate.

[0032] On the basis of the above scheme, the operating lever comprises:

[0033] A sleeve, wherein the sleeve is L-shaped, and a horizontal portion of the sleeve is rotatably connected to a side wall of the longitudinal plate;

[0034] an adjustment chamber disposed longitudinally within a longitudinal portion of the sleeve;

[0035] A limit plate, the limit plate being slidably disposed in the adjustment cavity;

[0036] A spring, the spring is also longitudinally arranged in the adjusting cavity, and the top and bottom ends of the spring are respectively connected to the limit plate and the adjusting cavity;

[0037] The pull rod is U-shaped, and both ends of the pull rod are respectively slidably inserted into the longitudinal part of the sleeve and connected with the limiting plate.

[0038] Preferably, it further comprises a bracket, which is mounted on the top end of the longitudinal plate and is provided with a support groove suitable for placing the pull rod.

[0039] (III) Beneficial effects

[0040] Compared with the prior art, the utility model provides a cabinet placement structure for a data center computer room, which has the following beneficial effects:

[0041] 1. The utility model uses an L-shaped mounting frame composed of a horizontal plate and a longitudinal plate, and the chamfered structure on the front side of the horizontal plate allows it to be inserted into the bottom of the cabinet more smoothly, wherein the length of the horizontal plate is greater than the center position of the cabinet, thereby ensuring the support of the horizontal plate to the cabinet, and the horizontal plate and the longitudinal plate are integrally formed, thereby improving the reliability of the mounting frame;

[0042] 2. The utility model can extend the extension rod outward through the telescopic property of the first electric cylinder, wherein the upper surface of the extension rod is lower than the upper surface of the horizontal plate, so that the extension rod can extend outward. When the extension rod is extended to the other side of the cabinet, the baffle assembly can block the other side of the cabinet, and form a clamping structure with the longitudinal plate, thereby improving the stability of the cabinet during operation;

[0043] 3. The utility model can tighten the side wall of the cabinet through the suction cup, improve the tightness between the longitudinal plate and the cabinet, avoid the cabinet from shaking when moving, and improve the stability of the placement frame when placing the cabinet;

[0044] 4. The utility model facilitates the operation of the placement frame through the operating rod, and with the action of the ball, the horizontal plate can be slid into the bottom of the cabinet more smoothly, and the overall mobility can be improved at the same time. With the operating rod, it is convenient to adjust the position and turn the placement frame, and better adjust it in combination with the installation position of the cabinet. Compared with the traditional cart, it can better insert the placement frame into the bottom of the cabinet. At the same time, the ball relative to the roller on the cart has a more flexible rotation angle, and with the cooperation of the baffle assembly and the suction cup, the matching stability between the placement frame and the cabinet can be improved, thereby improving the installation adaptability and efficiency of the cabinet in the computer room of the data center. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A schematic diagram of the three-dimensional structure of this application;

[0046] Figure 2 This is a schematic diagram of the three-dimensional structure of the present application from another angle;

[0047] Figure 3 This is a schematic diagram of the structure in which the extension rod is extended and the pull rod is pulled out in this application;

[0048] Figure 4 It is a schematic cross-sectional structure diagram of the extension rod in this application;

[0049] Figure 5 This is a schematic diagram of the internal cross-sectional structure of the bottom plate extension and the sleeve in this application;

[0050] Figure 6 It is a schematic diagram of the structure in which the extension rod is connected to the first electric cylinder in the present application.

[0051] In the figure: 1. horizontal plate; 2. longitudinal plate; 3. extension rod; 4. first electric cylinder; 5. suction cup; 6. ball; 7. chamfering structure; 8. adjustment groove; 9. baffle; 10. elastic member; 11. second electric cylinder; 12. pull rope; 13. slideway; 14. ball; 15. bottom plate; 16. third electric cylinder; 17. slide rod; 18. reinforcement plate; 19. sleeve; 20. adjustment chamber; 21. limit plate; 22. spring; 23. pull rod; 24. bracket. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only 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.

[0053] For examples, see Figures 1 to 6, a cabinet placement structure for a computer room of a data center, including a placement frame, the placement frame is composed of a horizontal plate 1 and a longitudinal plate 2, and forms an L shape, and also includes: an extension rod 3, a first electric cylinder 4, a baffle assembly, a suction cup 5, an operating rod, a ball 6 and a chamfering structure 7, the ball 6 is rotatably installed at the bottom end of the horizontal plate 1, and the front side of the horizontal plate 1 is provided with a chamfering structure 7, through the L-shaped placement frame composed of the horizontal plate 1 and the longitudinal plate 2, and through the chamfering structure 7 on the front side of the horizontal plate 1, it can be inserted into the bottom of the cabinet more smoothly, wherein the length of the horizontal plate 1 is greater than the center position of the cabinet, ensuring the support of the horizontal plate 1 to the cabinet, and the horizontal plate 1 and the longitudinal plate 2 are integrally formed, improving the reliability of the placement frame, at least two groups of slide grooves are symmetrically arranged on the horizontal plate 1, and an extension rod 3 is slidably installed inside each slide groove, and the first electric cylinder 4 and the extension rod 3 are arranged horizontally, In addition, the output end of the first electric cylinder 4 is connected to one end of the extension rod 3, and a groove structure suitable for the installation of the first electric cylinder 4 is provided on the horizontal plate 1. The baffle assembly is rotatably arranged on the extension rod 3. Through the telescopic property of the first electric cylinder 4, the extension rod 3 can be extended outward, wherein the upper surface of the extension rod 3 is lower than the upper surface of the horizontal plate 1, so that the extension rod 3 can be extended outward. When the extension rod 3 is extended to the other side of the cabinet, the other side of the cabinet can be blocked by the baffle assembly, and a clamping structure is formed with the longitudinal plate 2 to improve the stability when operating the cabinet. The suction cup 5 is installed on the inner wall of the longitudinal plate 2, and the operating rod is installed on the longitudinal plate 2 for operating the placement frame. The side wall of the cabinet can be sucked and tightened by the suction cup 5 to improve the tightness between the longitudinal plate 2 and the cabinet, avoid shaking of the cabinet when moving, and improve the stability of the placement frame when placing the cabinet.

[0054] Accordingly, see Figure 4 The baffle assembly includes: an adjustment slot 8, a baffle 9, an elastic member 10 and a leveling structure. The adjustment slot 8 is arranged on the extension rod 3, and the baffle 9 is rotatably arranged in the adjustment slot 8. The elastic member 10 is arranged on the baffle 9 and the adjustment slot 8 on a side away from the first electric cylinder 4, and is used to pull the baffle 9 to a vertical state with the adjustment slot 8. The leveling structure is arranged between the extension rod 3 and the baffle 9, and is used to level the baffle 9. The elastic member 10 can be a spring, and in order to ensure that the baffle 9 can maintain a vertical state with the adjustment slot 8, A storage hole suitable for storing the spring is provided in the adjustment groove 8. When the extension rod 3 is extended outward, the baffle 9 on the extension rod 3 is kept horizontal with the extension rod 3 under the action of the bottom of the cabinet. Then, when the extension rod 3 is extended to the outside of the cabinet, the baffle 9 is rotated to the longitudinal position under the tension of the spring, and the spring is stored in the storage hole. Then, the first electric cylinder 4 is contracted to press the baffle 9 against the outer wall of the cabinet. At this time, the suction cup 5 is opened so that the suction cup 5 on the longitudinal plate 2 also sucks the other side wall of the cabinet.

[0055] Accordingly, see Figure 4The flattening structure includes: a second electric cylinder 11, a pull rope 12, a slideway 13 and a ball 14. The extension rod 3 is provided with a mounting cavity inside, the second electric cylinder 11 is installed inside the mounting cavity, a stretching groove is provided between the mounting cavity and the adjustment groove 8, the pull rope 12 is provided in the stretching groove, the slideway 13 is T-shaped, and the slideway 13 is tilted on the inner side of the baffle 9, the ball 14 is located in the slideway 13, one end of the pull rope 12 is connected to the ball 14, and the other end of the pull rope 12 is connected to the second electric cylinder 1 1, wherein the length of the pull rope 12 is sufficient to rotate the baffle 9 to the longitudinal position without affecting the close contact between the baffle 9 and the side wall of the cabinet, and a groove suitable for pulling and placing is provided on the inner wall of the baffle 9 to reduce the damage to the pull rope 12 when the baffle 9 is in close contact with the cabinet. The setting of the slideway 13 and the cooperation with the rolling ball 14 improve the smoothness of the pull rope 12 when pulling the baffle 9, and the elasticity of the second electric cylinder 11 is used to release and tighten the pull rope 12.

[0056] Correspondingly, it also includes a lifting structure, which includes: a bottom plate 15, a third electric cylinder 16, a slide bar 17 and a reinforcing plate 18. A placement groove is provided at the bottom of the horizontal plate 1, and the bottom plate 15 is provided in the placement groove. The third electric cylinder 16 is longitudinally installed in the longitudinal plate 2, and the bottom output end of the third electric cylinder 16 is connected to the top of the bottom plate 15. In the embodiment, it is described that a groove body suitable for the installation of the third electric cylinder 16 is provided in the longitudinal plate 2, and the number of the third electric cylinder 16 is at least two, and the slide bar 17 is longitudinally connected to the top of the bottom plate 15. The longitudinal plate 2 is provided with a suitable slide bar 17 slidingly cooperates with the sliding hole, the reinforcing plate 18 is installed between the bottom plate 15 and the bottom output end of the third electric cylinder 16, and the bottom of the bottom plate 15 is also provided with a ball 6 flush with the bottom of the horizontal plate 1. When the floor of the machine room is uneven or the height of the cabinet needs to be adjusted, the bottom plate 15 can be pushed out by the third electric cylinder 16. Since the bottom plate 15 is in contact with the ground, that is, the horizontal plate 1 is relatively lifted, the cabinet is lifted to the required height to better adapt to the installation environment. The reinforcing plate 18 is used to improve the installation stability between the third electric cylinder 16 and the bottom plate 15.

[0057] Based on the above scheme, please refer to Figure 5The operating rod includes: a sleeve 19, an adjusting cavity 20, a limiting plate 21, a spring 22 and a pull rod 23. The sleeve 19 is L-shaped, and the horizontal part of the sleeve 19 is rotatably connected to the side wall of the longitudinal plate 2. The adjusting cavity 20 is longitudinally arranged in the longitudinal part of the sleeve 19, and the limiting plate 21 is slidably arranged in the adjusting cavity 20. The spring 22 is also longitudinally arranged in the adjusting cavity 20, and the top and bottom ends of the spring 22 are respectively connected to the limiting plate 21 and the adjusting cavity 20. The pull rod 23 is U-shaped, and the two ends of the pull rod 23 are respectively slidably inserted into the longitudinal part of the sleeve 19 and connected to the limiting plate 21. It includes a bracket 24, which is installed at the top of the longitudinal plate 2, and a support groove suitable for placing the pull rod 23 is set on the bracket 24. Through the action of the adjusting cavity 20 and the limit plate 21, the pull rod 23 can be stretched to the required length. Through the use of the spring 22, when the pull rod 23 is not in use, it can be retracted to a position close to the longitudinal plate 2, thereby improving the overall storage capacity. The pull rod 23 can be supported by the bracket 24, and the rotatability between the sleeve 19 and the longitudinal plate 2 makes it convenient for the user to select a suitable pulling angle, thereby enhancing the use effect of the placement frame and facilitating the application of force.

[0058] In summary, the cabinet placement structure of the computer room of the data center has a control box on the longitudinal plate 2 of the placement frame, and the control box is provided with control switches that respectively control the first electric cylinder 4, the second electric cylinder 11 and the third electric cylinder 16. Before use, first connect the plug on the control box to the power supply, wherein the cable is long enough and is equipped with a corresponding cable reel to prevent the cables from being scattered all over the ground, and then insert the horizontal plate 1 to the bottom of the cabinet that needs to be installed and moved, turn on the switch on the first electric cylinder 4, and extend the first electric cylinder 4 outward until the baffle 9 extends and pops up to form a vertical angle with the extension rod 3, then retract the first electric cylinder 4, and make the baffle 9 close to the side wall of the cabinet, wherein the suction cup 5 is also sucked tightly to the side wall of the cabinet, and the suction cup 5 can be a plastic suction cup 5 or an electric suction cup 5. If the electric suction cup 5 is used, a matching control switch can be installed on the control box, and then the pull rod 23 is pulled outward to pull the whole to move the position. When the cabinet needs to be lifted When the cabinet is moved to the required installation position, the first electric cylinder 4 is turned on to push the extension rod 3 outward to separate the baffle 9 from the side wall of the cabinet. At this time, the second electric cylinder 11 is turned on to extend the pull rope 12 outward to stretch the baffle 9 so that the baffle 9 is leveled and in a horizontal state with the extension rod 3. Then the first electric cylinder 4 is retracted to restore the extension rod 3 to its original position, and the placement frame is manually pulled out. When the placement frame is inserted into the bottom of the cabinet and pulled out from the bottom of the cabinet, it is necessary to manually support the cabinet for coordinated operation. When the cabinet needs to be placed against the wall, after the cabinet is moved to the approximate position, space for the extension rod 3 to operate is left between the cabinet and the wall. After the extension rod 3 is retracted to its original position, the distance between the cabinet and the wall is not long. The ball bearing 6 at the bottom of the placement frame can be used again to push the overall mobile cabinet to reach the placement position against the wall, and finally the placement frame can be pulled out.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cabinet placement structure for a data center computer room, comprising a placement frame, wherein the placement frame is composed of a horizontal plate (1) and a longitudinal plate (2) and forms an L shape, characterized in that: Also includes: An extension rod (3), wherein at least two groups of slide grooves are symmetrically arranged on the horizontal plate (1), and the extension rod (3) is slidably mounted inside each slide groove; A first electric cylinder (4), the first electric cylinder (4) and the extension rod (3) are arranged horizontally, and an output end of the first electric cylinder (4) is connected to one end of the extension rod (3); Wherein, a slot structure suitable for installing the first electric cylinder (4) is provided on the horizontal plate (1); A baffle assembly, the baffle assembly being rotatably arranged on the extension rod (3); A suction cup (5), the suction cup (5) being mounted on the inner side wall of the longitudinal plate (2); An operating rod, which is mounted on the longitudinal plate (2) and is used to operate the mounting frame; A ball (6), the ball (6) being rotatably mounted on the bottom end of the horizontal plate (1); A chamfered structure (7), the front side of the horizontal plate (1) is provided with the chamfered structure (7).

2. The cabinet placement structure of a data center computer room according to claim 1, characterized in that: The baffle assembly comprises: An adjustment slot (8), wherein the adjustment slot (8) is arranged on the extension rod (3); a baffle (9), the baffle (9) being rotatably disposed in the adjustment slot (8); an elastic member (10), the elastic member (10) being arranged on a side of the baffle plate (9) and the adjustment slot (8) away from the first electric cylinder (4), and being used to pull the baffle plate (9) to a state perpendicular to the adjustment slot (8); A flattening structure is arranged between the extension rod (3) and the baffle plate (9) and is used to flatten the baffle plate (9).

3. The cabinet placement structure of a data center computer room according to claim 2, characterized in that: The flattening structure comprises: A second electric cylinder (11), wherein a mounting cavity is provided inside the extension rod (3), and the second electric cylinder (11) is mounted inside the mounting cavity; A pull rope (12), wherein a stretching groove is provided between the installation cavity and the adjustment groove (8), and the pull rope (12) is arranged in the stretching groove; A slideway (13), the slideway (13) is T-shaped, and the slideway (13) is arranged obliquely on the inner side of the baffle (9); A rolling ball (14), the rolling ball (14) is located in the slideway (13), one end of the pull rope (12) is connected to the rolling ball (14), and the other end of the pull rope (12) is connected to the output end of the second electric cylinder (11).

4. The cabinet placement structure of a data center computer room according to claim 3, characterized in that: Also included is a lifting structure, the lifting structure comprising: A bottom plate (15), wherein a placement groove is provided at the bottom of the horizontal plate (1), and the bottom plate (15) is arranged in the placement groove; A third electric cylinder (16), the third electric cylinder (16) being longitudinally mounted in the longitudinal plate (2), and a bottom output end of the third electric cylinder (16) being connected to the top of the bottom plate (15); A slide rod (17), the slide rod (17) being longitudinally connected to the top of the bottom plate (15), and the longitudinal plate (2) being provided with a slide hole suitable for sliding fit of the slide rod (17); A reinforcing plate (18), the reinforcing plate (18) being installed between the bottom plate (15) and the bottom output end of the third electric cylinder (16); The bottom of the bottom plate (15) is also provided with the ball bearing (6) which is flush with the bottom of the horizontal plate (1).

5. The cabinet placement structure of a data center computer room according to claim 4, characterized in that: The operating lever comprises: A sleeve (19), wherein the sleeve (19) is L-shaped, and a horizontal portion of the sleeve (19) is rotatably connected to a side wall of the longitudinal plate (2); an adjustment chamber (20), the adjustment chamber (20) being longitudinally arranged in a longitudinal portion of the sleeve (19); a limiting plate (21), the limiting plate (21) being slidably disposed in the adjusting cavity (20); A spring (22), wherein the spring (22) is also longitudinally arranged in the adjustment cavity (20), and the top end and the bottom end of the spring (22) are respectively connected to the limit plate (21) and the adjustment cavity (20); The pull rod (23) is U-shaped, and both ends of the pull rod (23) are respectively slidably inserted into the longitudinal part of the sleeve (19) and connected to the limiting plate (21).

6. The cabinet placement structure of a data center computer room according to claim 5, characterized in that: It also comprises a bracket (24), which is installed on the top end of the longitudinal plate (2), and a support groove suitable for placing the pull rod (23) is provided on the bracket (24).