Device for balancing air pressure inside and outside rectification screen cabinet

Abstract

The utility model discloses a device for balancing air pressure inside and outside a rectification screen cabinet, which comprises a lock cylinder, a spring bolt, a baffle plate and an air pressure balancing hole, and one end of the spring bolt is matched with the lock cylinder so as to open and close a door plate of the excitation rectification screen cabinet through the rotating motion of the spring bolt; the lock tongue is provided with a first position for opening an excitation rectification screen cabinet door plate and a second position for closing the excitation rectification screen cabinet door plate, and when the lock tongue is switched from the first position to the second position, the lock tongue drives the blocking piece to move in the preset direction so as to cover an air pressure balance hole formed in the excitation rectification screen cabinet door plate; and in the process that the spring bolt is switched from the second position to the first position, the blocking piece is driven to move in the preset direction so as to open the air pressure balance hole. According to the utility model, the interlocking mechanism and the separation blade structure are ingeniously designed on the door lock, so that the air pressure balance inside and outside the screen cabinet can be realized while the door lock is opened, and the separation blade can be closed while the door is closed, thereby avoiding the risk of mistaken touch.

Description

Technical Field

[0001] The utility model relates to a device for balancing the internal and external air pressure of a rectifier panel cabinet, belonging to the technical field of power equipment. Background Art

[0002] The rectifier is the core component of the excitation system, converting AC power into DC power through a rectifier bridge. During the rectification process, the equipment generates a large amount of heat, which raises the temperature inside the cabinet, affecting the operating status and service life of the internal components. Therefore, it is necessary to install a high-power axial flow fan on the top of the cabinet to achieve cooling by extracting air. The use of an axial flow fan can effectively dissipate heat, ensuring that the internal electronic components operate at a suitable temperature and extending their service life.

[0003] Ventilation holes are designed on the back of the excitation cabinet to facilitate air circulation. However, since the back of the cabinet houses relatively dangerous equipment such as circuit breakers and knife switches, the back door is typically opened for operation and maintenance only after the excitation system has been shut down. The cabinet's back door is designed to be lightweight and easy to open without requiring much effort.

[0004] In contrast, the front of a cabinet lacks ventilation holes and is not connected to the back, making the front door more difficult to open. Maintenance personnel often need to use both hands to open the front door, which not only increases the difficulty but also creates the risk of falls or stumbles. Because the front does not require as much cooling as the back, it doesn't require the extensive grid of ventilation holes required on the back.

[0005] In order to improve this design defect, it is necessary to invent an air pressure balancing device that can be closed at ordinary times and opened when needed. Summary of the Invention

[0006] The purpose of this utility model is to provide a device for balancing the air pressure inside and outside the rectifier panel cabinet. Through ingenious mechanical design, a device for balancing the air pressure inside and outside the rectifier panel cabinet is constructed, and the air pressure balance inside and outside the rectifier panel cabinet is achieved in a mechanical way.

[0007] In order to achieve the above-mentioned purpose, the utility model provides a device for balancing the air pressure inside and outside the rectifier screen cabinet, including a lock core 1, a lock tongue 2, a baffle 5, and an air pressure balancing hole 7. One end of the lock tongue 2 cooperates with the lock core 1 to open and close the excitation rectifier screen cabinet door panel through the rotational movement of the lock tongue 2; the lock tongue 2 has a first position for opening the excitation rectifier screen cabinet door panel and a second position for closing the excitation rectifier screen cabinet door panel. When the lock tongue 2 switches from the first position to the second position, the baffle 5 is driven to move along a preset direction to cover the air pressure balancing hole 7 opened on the excitation rectifier screen cabinet door panel; in the process of the lock tongue 2 switching from the second position to the first position, the baffle 5 is driven to move along a preset direction to open the air pressure balancing hole 7.

[0008] Furthermore, the device for balancing the air pressure inside and outside the rectifier panel cabinet also includes a locking mechanism, the other end of the lock tongue 2 is provided with an extension part, the free end of the extension part is actively connected to one end of the locking mechanism, and the other end of the locking mechanism is actively connected to the baffle 5.

[0009] Furthermore, the interlocking mechanism includes an active connecting bolt 3 and a connecting rod 4 , the free end of the extension portion is connected to one end of the connecting rod 4 via the active connecting bolt 3 , and the other end of the connecting rod 4 is connected to the baffle 5 via the active connecting bolt 3 .

[0010] Furthermore, a baffle bayonet 6 is provided on the door panel of the excitation rectifier panel cabinet on the side of the air pressure balance hole 7, and the baffle 5 cooperates with the baffle bayonet 6 to guide the movement of the baffle 5 along a preset direction.

[0011] Furthermore, the baffle bayonet 6 is provided in two opposite groups, and each group is provided with one or more baffle bayonet 6 .

[0012] Furthermore, the contact area between the inner side of the baffle plate latch 6 and the baffle plate 5 is lubricated.

[0013] Furthermore, the shape of the air pressure balance hole 7 is circular or square.

[0014] Furthermore, the number of the air pressure balance holes 7 is one or more.

[0015] Furthermore, when there is one air pressure balance hole 7 , the diameter of the air pressure balance hole 7 is smaller than the width of the baffle 5 , and the area occupied by the air pressure balance hole 7 is smaller than the area of ​​the baffle 5 .

[0016] Furthermore, when there are multiple air pressure balance holes 7 , the maximum distribution size of the multiple air pressure balance holes 7 along the width direction of the baffle 5 is smaller than the width of the baffle 5 , and the total area occupied by the multiple air pressure balance holes 7 is smaller than the area of ​​the baffle 5 .

[0017] Furthermore, the air pressure balance hole 7 is located one to two centimeters below the center of the door panel.

[0018] The beneficial effects of the present invention are as follows: the air pressure balancing device proposed by the present invention is used to balance the air pressure inside and outside the excitation rectifier panel cabinet with a high-power axial flow fan as a cooling device. By cleverly designing a chain mechanism and a baffle structure on the door lock, the air pressure inside and outside the panel cabinet can be balanced while the door lock is opened, and the baffle can also be closed while the door is closed to avoid the risk of accidental touch; the entire structure is a purely mechanical structure, does not require additional energy supply, is energy-saving and environmentally friendly; at the same time, the principle is simple, the structure and operation are simple, and it is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is the overall structural diagram of the utility model;

[0021] Figure 2 The schematic diagram of the utility model installed on the screen cabinet shows the door closed, and the dotted circle indicates the position of the balance hole;

[0022] Figure 3 Schematic diagram of the connection between the connecting rod and the baffle;

[0023] The numbers in the figure are: 1-lock cylinder; 2-lock tongue; 3-active connecting bolt, 4-connecting rod, 5-blocking plate, 6-blocking plate bayonet, 7-air pressure balance hole. DETAILED DESCRIPTION

[0024] The utility model will be further described below in conjunction with the accompanying drawings and embodiments, but the content of the utility model is not limited to the scope of the drawings.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0026] The rectifier panel cabinet of the excitation system is the core part of the excitation system. Because the rectifier bridge releases a lot of heat during rectification, which causes the temperature inside the panel cabinet to rise, a high-power axial flow fan needs to be installed on the top of the panel cabinet for cooling. Due to the high power of the axial flow fan, the air pressure inside and outside the panel cabinet will be unbalanced, and the internal air pressure will be lower than the external air pressure. Under the action of the pressure difference, it is particularly difficult for the operation and maintenance personnel to open the rectifier panel cabinet, and after the door is opened a crack, the air pressure inside and outside the panel cabinet is quickly balanced, resulting in a sudden decrease in the resistance to opening the door, causing the operation and maintenance personnel who open the door to stagger or even fall. At the same time, they may accidentally touch important equipment such as switches while staggering and falling. In order to achieve a balance of air pressure inside and outside the panel cabinet, the utility model provides a device for balancing the air pressure inside and outside the rectifier panel cabinet.

[0027] The embodiments of the present utility model are described below with reference to the accompanying drawings.

[0028] like Figure 1-Figure 3 As shown, the device for balancing the air pressure inside and outside the rectifier screen cabinet includes a lock core 1, a lock tongue 2, a baffle 5, and an air pressure balancing hole 7. One end of the lock tongue 2 cooperates with the lock core 1 to open and close the door panel of the excitation rectifier screen cabinet through the rotation of the lock tongue 2. The lock tongue 2 has a first position for opening the front door panel of the excitation rectifier screen cabinet and a second position for closing the front door panel of the excitation rectifier screen cabinet. When the lock tongue 2 switches from the first position to the second position, it drives the baffle 5 to move in a preset direction to cover the air pressure balancing hole 7 provided on the front door panel of the excitation rectifier screen cabinet. When the lock tongue 2 switches from the second position to the first position, it drives the baffle 5 to move in a preset direction to open the air pressure balancing hole 7. It should be noted that the door lock composed of the lock core 1 and the lock tongue 2 is a lock of an ordinary metal cabinet. As long as the shape and rotation method of the lock tongue 2 are the same as those of the present patent, the lock can be applied to the present utility model.

[0029] Furthermore, the device for balancing the air pressure inside and outside the rectifier cabinet also includes a locking mechanism, wherein the other end of the lock tongue 2 is provided with a movably connected extension, the free end of the extension is movably connected to one end of the locking mechanism, and the other end of the locking mechanism is movably connected to the baffle 5. For example, the lock tongue is an extended type, one end of which is movably connected to one end of the connecting rod via a bolt, and the other end of the lock tongue is used for closing the door.

[0030] Furthermore, the interlocking mechanism includes an active connecting bolt 3 and a connecting rod 4 , the free end of the extension portion is connected to one end of the connecting rod 4 via the active connecting bolt 3 , and the other end of the connecting rod 4 is connected to the baffle 5 via the active connecting bolt 3 .

[0031] Furthermore, a baffle bayonet 6 is provided on the front door panel of the excitation rectifier panel cabinet around the air pressure balance hole 7, and the baffle 5 cooperates with the baffle bayonet 6 to guide the movement of the baffle 5 along a preset direction.

[0032] Furthermore, the baffle bayonet 6 is provided in two opposite groups, and each group can be provided with one or more baffle bayonet 6 .

[0033] Exemplarily, four baffle bayonet holes 6 are provided, two each arranged above and below the air pressure balance hole 7 , the upper two baffle bayonet holes 6 slide in conjunction with the upper side of the baffle 5 , and the lower two baffle bayonet holes 6 slide in conjunction with the lower side of the baffle 5 .

[0034] Furthermore, the contact area between the inner side of the baffle bayonet 6 and the baffle 5 is lubricated to reduce friction and make it easier to pull out.

[0035] During specific installation, the door lock composed of the lock core 1 and the lock tongue 2 can be placed inside the screen cabinet, and the interlocking mechanism and the baffle 5 can be installed on the inner side of the front door panel of the rectifier screen cabinet.

[0036] When in use, when the handle is rotated to open the door, the lock tongue 2 rotates. Since the lock tongue 2 and the connecting rod 4, as well as the connecting rod 4 and the baffle 5 are actively connected, the lock tongue 2 will rotate with the connecting rod 4 to make a lateral movement, thereby drawing the baffle along the baffle bayonet 6, exposing the air pressure balance hole 7, thereby achieving the balance of air pressure inside and outside the cabinet, and then easily opening the main door of the rectifier cabinet; when the handle is rotated to close the door, the lock tongue 2 rotates. Since the lock tongue 2 and the connecting rod 4, as well as the connecting rod 4 and the baffle 5 are actively connected, the lock tongue 2 will rotate with the connecting rod 4 to make a lateral movement, thereby drawing the baffle along the baffle bayonet 6, and the baffle blocks the air pressure balance hole, so that the baffle can cover the air pressure balance hole 7 when the main door of the cabinet is closed, thereby preventing accidental touching of the internal components of the cabinet, such as Figure 2 The state shown is the door closed state.

[0037] Furthermore, the center of the pressure balance hole 7 is located one to two centimeters below the center of the door panel. The size of the pressure balance hole varies according to the power of the fan. The greater the fan power, the larger the hole.

[0038] Furthermore, the shape of the air pressure balance hole 7 is circular, square, etc. Figure 2 The one shown is circular, but it can be designed into other shapes as needed.

[0039] Furthermore, the number of the air pressure balance holes 7 is one or more.

[0040] Furthermore, when the number of the air pressure balance hole 7 is one, the diameter of the air pressure balance hole 7 is smaller than the width of the baffle 5, and the area occupied by the air pressure balance hole 7 is smaller than the area of ​​the baffle 5, so that the air pressure balance hole 7 can be covered by the baffle 5 in the closed state.

[0041] Furthermore, when there are multiple air pressure balance holes 7, the maximum distribution size of the multiple air pressure balance holes 7 along the width direction of the baffle 5 is smaller than the width of the baffle 5, and the total area occupied by the multiple air pressure balance holes 7 is smaller than the area of ​​the baffle 5, so that in the closed state, the multiple air pressure balance holes 7 can be covered by the baffle 5.

[0042] By applying the above technical solution, it can be seen that the utility model can achieve air pressure balance inside and outside the cabinet while opening the door lock by cleverly designing a chain mechanism and a baffle structure on the door lock, and can also close the baffle when the door is closed, avoiding the risk of accidental touch.

[0043] The specific embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A device for balancing the air pressure inside and outside the rectifier panel cabinet, characterized in that: The invention comprises a lock core (1), a lock tongue (2), a baffle (5), and an air pressure balance hole (7); one end of the lock tongue (2) cooperates with the lock core (1) to open and close the excitation rectifier screen cabinet door panel through the rotational movement of the lock tongue (2); the lock tongue (2) has a first position for opening the excitation rectifier screen cabinet door panel and a second position for closing the excitation rectifier screen cabinet door panel; when the lock tongue (2) switches from the first position to the second position, the baffle (5) is driven to move in a preset direction to cover the air pressure balance hole (7) provided on the excitation rectifier screen cabinet door panel; and when the lock tongue (2) switches from the second position to the first position, the baffle (5) is driven to move in a preset direction to open the air pressure balance hole (7).

2. The device for balancing the internal and external air pressure of a rectifier panel cabinet according to claim 1 is characterized in that: The device for balancing the air pressure inside and outside the rectifier panel cabinet also includes a chain mechanism, the other end of the lock tongue (2) is provided with an extension portion, the free end of the extension portion is actively connected to one end of the chain mechanism, and the other end of the chain mechanism is actively connected to the baffle (5).

3. The device for balancing the internal and external air pressure of a rectifier panel cabinet according to claim 2 is characterized in that: The interlocking mechanism comprises an active connecting bolt (3) and a connecting rod (4); the free end of the extension portion is connected to one end of the connecting rod (4) via the active connecting bolt (3); and the other end of the connecting rod (4) is connected to the baffle (5) via the active connecting bolt (3).

4. The device for balancing the internal and external air pressure of a rectifier panel cabinet according to claim 1 is characterized in that: A baffle bayonet (6) is provided on the door panel of the excitation rectifier panel cabinet on the side of the air pressure balance hole (7), and the baffle (5) cooperates with the baffle bayonet (6) to guide the movement of the baffle (5) along a preset direction.

5. The device for balancing the internal and external air pressure of a rectifier panel cabinet according to claim 4 is characterized in that: The baffle bayonet (6) is provided in two opposite groups, with each group being provided with one or more baffle bayonet (6).

6. The device for balancing the internal and external air pressure of a rectifier panel cabinet according to claim 4 is characterized in that: The contact portion between the inner side of the baffle plate snap-in (6) and the baffle plate (5) is lubricated.

7. The device for balancing the internal and external air pressure of a rectifier panel cabinet according to claim 1 is characterized in that: The air pressure balance hole (7) is in the shape of a circle or a square.

8. The device for balancing the internal and external air pressure of a rectifier panel cabinet according to claim 1 is characterized in that: The number of the air pressure balance holes (7) is one or more.

9. The device for balancing the internal and external air pressure of a rectifier panel cabinet according to claim 8, characterized in that: When the number of the air pressure balance hole (7) is one, the diameter of the air pressure balance hole (7) is smaller than the width of the baffle (5), and the area occupied by the air pressure balance hole (7) is smaller than the area of ​​the baffle (5).

10. The device for balancing the internal and external air pressure of a rectifier panel cabinet according to claim 8, characterized in that: When there are multiple air pressure balance holes (7), the maximum distribution size of the multiple air pressure balance holes (7) along the width direction of the baffle (5) is smaller than the width of the baffle (5), and the total area occupied by the multiple air pressure balance holes (7) is smaller than the area of ​​the baffle (5).

11. The device for balancing the air pressure inside and outside the rectifier panel cabinet according to claim 1, characterized in that: The air pressure balance hole (7) is located one to two centimeters below the center of the door panel.

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