A switch cabinet with pressure relief protection structure

Abstract

The present invention discloses a switch cabinet with a pressure relief protection structure, and relates to the technical field of switch cabinets. The switch cabinet with a pressure relief protection structure comprises a switch cabinet, wherein the switch cabinet has a cabinet body, and a front cabinet door and a rear cabinet door are respectively installed on both sides of the cabinet body, wherein a pressure relief mechanism is also installed on the front cabinet door; the pressure relief mechanism comprises an outer frame fixedly connected to the front cabinet door, an intermediate baffle is placed on the outer frame, two ends of the intermediate baffle are movably connected with side baffles, and the intermediate baffle is movably connected to the outer frame through the side baffles; wherein the intermediate baffle comprises a movable baffle plugged into the outer frame; the present invention pushes the movable baffle to move by internal pressure, and the pressure relief airway on the side of the movable baffle can divide the pressure into multiple groups for guiding, so that the internal pressure is quickly released, and the reinforcing ribs on the other side of the movable baffle reinforce the movable baffle to prevent the movable baffle from being deformed due to excessive pressure, thereby extending the service life of the movable baffle.

Description

Technical Field

[0001] The present invention specifically relates to the technical field of switch cabinets, and in particular to a switch cabinet with a pressure relief protection structure. Background Art

[0002] Switchgear is an electrical equipment widely used in power systems. It is mainly used to control, protect, measure and distribute electrical energy. The working principle of the switchgear is based on the basic principles of circuits and the characteristics of electrical components. When the power supply is connected to the switchgear, the electrical energy is distributed to each branch or electrical equipment through the busbar. During normal operation, the circuit breaker is in the closed state, and the current flows to the load through the circuit breaker, disconnector and other equipment. When an abnormal situation occurs in the circuit, such as overload, short circuit, etc., the protection device will detect the fault signal and issue a command to trip the circuit breaker and cut off the circuit, thereby protecting the safety of electrical equipment and lines;

[0003] When a fault occurs inside the switch cabinet, such as a short circuit causing an arc, the air will instantly expand due to heat, causing the pressure inside the cabinet to rise sharply. If the pressure is not relieved in time, the excessive pressure may cause the cabinet to deform or rupture. The electrical components in the switch cabinet are easily damaged under high pressure. For example, the insulating material may be squeezed and deformed, resulting in a decrease in insulation performance. The contacts of components such as relays and contactors may be displaced or damaged due to pressure shock, affecting their normal functions.

[0004] However, in practice, people have noticed that the internal pressure needs to reach the set pressure when the pressure relief device is opened. After the pressure relief, the pressure inside the switch cabinet is only slightly lower than the pressure relief pressure. At this time, the pressure inside the switch cabinet is still higher than the pressure outside, and the high temperature inside the switch cabinet will cause the air to continue to expand. Therefore, the switch cabinet cannot be opened immediately after the pressure relief. It is necessary to wait until the temperature inside the switch cabinet is completely reduced to a safe temperature. Only then will the internal pressure be reduced to a safe value. If it is opened immediately, the internal pressure will push the cabinet door open, which may easily injure workers and cause safety accidents. Summary of the invention

[0005] The purpose of the present invention is to provide a switch cabinet with a pressure relief protection structure, in which the pressure relief structure is automatically reset by a spring, and a knob for adjusting the opening pressure is provided at the end of the spring, which is convenient for manually releasing the pressure inside the switch cabinet in conjunction with a manual opening structure, so that the switch cabinet can be opened more quickly for inspection and maintenance, so as to solve the technical problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A switch cabinet with a pressure relief protection structure comprises a switch cabinet, wherein the switch cabinet has a cabinet body, and a front cabinet door and a rear cabinet door are respectively installed on both sides of the cabinet body, wherein a pressure relief mechanism is also installed on the front cabinet door;

[0008] The pressure relief mechanism comprises an outer frame fixedly connected to the front cabinet door, an intermediate baffle is placed in the outer frame, two ends of the intermediate baffle are movably connected to side baffles, and the intermediate baffle is movably connected to the outer frame through the side baffles;

[0009] The middle baffle includes a movable baffle inserted in the outer frame, and shaft sleeves connected to the side baffles are integrally provided at both ends of the movable baffle, and a pin shaft rod corresponding to the shaft sleeve is provided at the end of the side baffle, and the side baffle is movably connected to the movable baffle through a rotational connection between the pin shaft rod and the shaft sleeve;

[0010] The end of the side baffle away from the movable baffle is symmetrically fixedly connected with a cylindrical slider, and sliding grooves corresponding to the cylindrical sliders are opened on both sides of the outer frame, and the cylindrical sliders are inserted in the sliding grooves and slidably connected with the sliding grooves.

[0011] As a further technical solution of the present invention, a pressure relief airway is provided on one side of the movable baffle, and the pressure relief airway has a longitudinal groove and a plurality of transverse grooves, wherein the transverse grooves are symmetrically distributed on both sides of the longitudinal groove, and one end of the transverse groove is connected to the longitudinal groove, and the other end extends to the side of the movable baffle;

[0012] The other side of the movable baffle is fixedly connected with a reinforcement rib plate, and both ends of the reinforcement rib plate are fixedly connected with manual pressure relief handles.

[0013] As a further technical solution of the present invention, a fixing frame is symmetrically fixedly connected to the side surface of the outer frame, and the fixing frame is located on one side of the side baffle. In addition, a connecting ear plate corresponding to the fixing frame is integrally provided on the side baffle.

[0014] As a further technical solution of the present invention, the fixing frame includes a support plate fixedly connected to the outer frame at both ends, and a mounting groove is opened in the middle of the support plate, and circular hole plates integral with the support plate are provided on both sides of the mounting groove.

[0015] As a further technical solution of the present invention, a pressure reset structure is movably connected in the mounting groove, and the end of the pressure reset structure passes through the mounting groove and is movably connected to the side baffle plate, wherein the pressure reset structure includes a swing seat placed in the mounting groove, and both ends of the swing seat are integrally provided with protrusions that are inserted into the circular orifice plate.

[0016] As a further technical solution of the present invention, the inner side thread of the swing seat is connected with a threaded connecting rod, one end of the threaded connecting rod is movably connected to the connecting ear plate on the side of the side baffle through a pin, and the other end of the threaded connecting rod passes through the rear thread of the swing seat and is matched with a threaded adjustment ring.

[0017] As a further technical solution of the present invention, a compression spring is sleeved on the end of the threaded connecting rod, and the two ends of the compression spring are respectively fitted with the swing seat and the threaded adjustment ring.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention pushes the movable baffle to move by the internal pressure, and the pressure relief airway on the side of the movable baffle can divide the pressure into multiple groups for guidance, so that the internal pressure can be quickly released, and the reinforcing ribs on the other side of the movable baffle reinforce the movable baffle to prevent the movable baffle from being deformed due to excessive pressure, thereby extending the service life of the movable baffle;

[0020] 2. In the present invention, the manual pressure relief handle of the movable baffle is located on the outside of the switch cabinet, which is convenient for the staff to manually open the movable baffle outside the switch cabinet, thereby completely releasing the pressure inside the switch cabinet, preventing the staff from pushing the cabinet door to hit the workers when opening the cabinet door, eliminating the potential safety hazards during use and improving the safety effect;

[0021] 3. The present invention rotates the threaded adjustment ring, and adjusts the position of the threaded adjustment ring on the outside of the threaded connecting rod through the threaded cooperation between the threaded adjustment ring and the threaded connecting rod, thereby controlling the distance between the threaded adjustment ring and the swing seat, adjusting the initial compression ratio of the compression spring, and further adjusting the pressure of the automatic opening of the movable baffle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention in use state.

[0023] Figure 2 The present invention Figure 1 Another perspective of the picture.

[0024] Figure 3 It is a three-dimensional structural schematic diagram of the pressure relief mechanism in the present invention.

[0025] Figure 4 The present invention Figure 3 Another perspective of the picture.

[0026] Figure 5 The present invention Figure 4 A partial enlarged schematic diagram of .

[0027] Figure 6 The present invention Figure 4 A partial enlarged schematic diagram of .

[0028] Figure 7 It is a schematic diagram of the position structure of the middle baffle and the side baffle in the present invention.

[0029] Figure 8The present invention Figure 7 Another perspective of the picture.

[0030] In the figure:

[0031] Cabinet body-1, cooling fan-2, front cabinet door-3, outer frame-4, middle baffle-5, movable baffle-51, reinforcement rib-52, manual pressure relief handle-53, pressure relief air duct-54, side baffle-6, connecting ear plate-61, cylindrical slider-62, rear cabinet door-7, plug-in push rod-8, connecting plate-81, push plate-82, hollow limit frame-83, fixing frame-9, support plate-91, installation groove-92, pressure reset structure-10, swing seat-101, threaded connecting rod-102, compression spring-103, threaded adjustment ring-104. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-2 The embodiment of the present invention provides a switch cabinet with a pressure relief protection structure, including a switch cabinet, wherein the switch cabinet has a cabinet body 1, and a front cabinet door 3 and a rear cabinet door 7 are respectively installed on both sides of the cabinet body 1, wherein a pressure relief mechanism is also installed on the front cabinet door 3;

[0034] The pressure relief mechanism includes an outer frame 4 fixedly connected to the front cabinet door 3, an intermediate baffle 5 is placed in the outer frame 4, two ends of the intermediate baffle 5 are movably connected to side baffles 6, and the intermediate baffle 5 is movably connected to the outer frame 4 through the side baffles 6;

[0035] Among them, the middle baffle 5 includes a movable baffle 51 inserted in the outer frame 4, and the two ends of the movable baffle 51 are integrally provided with shaft sleeves connected to the side baffle 6, and the end of the side baffle 6 is provided with a pin shaft rod corresponding to the shaft sleeve, and the side baffle 6 is movably connected to the movable baffle 51 through the rotational connection between the pin shaft rod and the shaft sleeve.

[0036] The end of the side baffle 6 away from the movable baffle 51 is symmetrically fixedly connected with a cylindrical slider 62, and sliding grooves corresponding to the cylindrical slider 62 are opened on both sides of the outer frame 4, and the cylindrical slider 62 is inserted into the sliding groove and slidably connected with the sliding groove.

[0037] In this embodiment, please refer to Figure 3 , Figure 7-8A pressure relief air duct 54 is provided on one side of the movable baffle 51. The pressure relief air duct 54 has a longitudinal groove and a plurality of transverse grooves, wherein the transverse grooves are symmetrically distributed on both sides of the longitudinal groove, and one end of the transverse groove is connected to the longitudinal groove, and the other end extends to the side of the movable baffle 51;

[0038] Furthermore, a reinforcing rib 52 is fixedly connected to the other side of the movable baffle 51 , and manual pressure relief handles 53 are fixedly connected to both ends of the reinforcing rib 52 .

[0039] Furthermore, a fixing frame 9 is symmetrically fixedly connected to the side surface of the outer frame 4 , and the fixing frame 9 is located on one side of the side baffle 6 , and a connecting ear plate 61 corresponding to the fixing frame 9 is also integrally provided on the side baffle 6 .

[0040] In this embodiment, please refer to Figure 4-6 The fixing frame 9 includes a support plate 91 fixedly connected to the outer frame 4 at both ends, and a mounting groove 92 is opened in the middle of the support plate 91, and circular hole plates integral with the support plate 91 are provided on both sides of the mounting groove 92.

[0041] Furthermore, a pressure reset structure 10 is movably connected in the mounting groove 92, and an end of the pressure reset structure 10 passes through the mounting groove 92 and is movably connected to the side baffle 6, wherein the pressure reset structure 10 includes a swing seat 101 placed in the mounting groove 92, and both ends of the swing seat 101 are integrally provided with protrusions that are plugged into the circular orifice plate.

[0042] To be more specific, the inner side of the swing seat 101 is threadedly connected to a threaded connecting rod 102, one end of the threaded connecting rod 102 is movably connected to the connecting ear plate 61 on the side of the side baffle 6 through a pin, and the other end of the threaded connecting rod 102 passes through the swing seat 101 and is threadedly matched with a threaded adjustment ring 104.

[0043] Specifically, the end of the threaded connecting rod 102 is sleeved with a compression spring 103 , and the two ends of the compression spring 103 are respectively fitted with the swing seat 101 and the threaded adjustment ring 104 .

[0044] By adopting the above technical solution, when a fault occurs inside the switch cabinet, such as a short circuit generating an arc, the air will expand instantly due to heat, causing the pressure in the cabinet to increase sharply. The pressure will push the movable baffle 51 to move outward, and the side baffles 6 at both ends of the movable baffle 51 will rotate along with the movement of the movable baffle 51, and the end of the side baffle 6 away from the movable baffle 51 is connected by sliding between the cylindrical slider 62 and the slide groove, so that the end of the side baffle 6 slides toward the inside of the outer frame 4, and at the same time, the connecting ear plate 61 on the side of the side baffle 6 drives the threaded connecting rod 102 to move on the inside of the swing seat 101, and the threaded adjustment ring 104 follows the movement of the threaded connecting rod 102 to compress the compression spring 103, and the movable baffle 51 moves to the side of the outer frame 4. At this time, the pressure inside the switch cabinet is released through the gap between the movable baffle 51 and the outer frame 4. When the pressure inside the switch cabinet is lower than the elastic force of the compression spring 103, the compression spring 103 will drive the side baffle 6 to reset through the threaded connecting rod 102, thereby resetting the side baffle 6 and the movable baffle 51. Before the worker opens the front cabinet door 3, he needs to manually open the movable baffle 51 through the manual pressure relief handle 53 to completely release the pressure inside the switch cabinet.

[0045] In this embodiment, a plug-in push rod 8 is symmetrically provided on one side of the outer frame 4 located in the cabinet 1. The plug-in push rod 8 includes a hollow limit frame 83 fixedly connected to the outer frame 4. A push plate 82 is slidably connected in the hollow limit frame 83, and the push plate 82 can slide on the inner side of the hollow limit frame 83.

[0046] Furthermore, a rectangular slot is provided on the side of the hollow limit frame 83 , one end of the push plate 82 is fixedly connected to the connecting plate 81 , and one end of the connecting plate 81 close to the push plate 82 is inserted into the rectangular slot provided on the side of the hollow limit frame 83 .

[0047] In this embodiment, the push plate 82 is located on the side of the movable baffle 51 close to the pressure relief air duct 54, and the end of the push plate 82 is arranged in a Y shape. The push plate 82 is used to enable the connecting plate 81 to push the movable baffle 51 to move to the outside of the outer frame 4, so that the switch cabinet can be manually depressurized on the other side.

[0048] In this embodiment, the two push plates 82 are respectively located on both sides of the movable baffle 51 to facilitate manual opening of the movable baffle 51 .

[0049] The working principle of the present invention is: when a fault occurs inside the switch cabinet, such as a short circuit generating an arc, the air will expand instantly due to heat, causing the pressure in the cabinet to increase sharply, and the pressure will push the movable baffle 51 to move outward, and the side baffles 6 at both ends of the movable baffle 51 will rotate following the movement of the movable baffle 51, and the end of the side baffle 6 away from the movable baffle 51 is connected by sliding between the cylindrical slider 62 and the slide groove, so that the end of the side baffle 6 slides in the outer frame 4, and at the same time, the connecting ear plate 61 on the side of the side baffle 6 drives the threaded connecting rod 102 to move on the inner side of the swing seat 101, and the threaded adjustment ring 104 follows the movement of the threaded connecting rod 102 to compress the compression spring 103, and the movable baffle 51 moves to the side of the outer frame 4. At this time, the pressure inside the switch cabinet is released through the gap between the movable baffle 51 and the outer frame 4. When the pressure inside the switch cabinet is lower than the elastic force of the compression spring 103 , the compression spring 103 will drive the side baffle 6 to reset through the threaded connecting rod 102, thereby resetting the side baffle 6 and the movable baffle 51. Before the worker opens the front cabinet door 3, he needs to manually open the movable baffle 51 through the manual pressure relief handle 53 to completely release the pressure inside the switch cabinet. After opening the rear cabinet door 7, the connecting plate 81 can be used to push the movable baffle 51 to move outward through the push plate 82 until the movable baffle 51 moves to the outside of the outer frame 4, and the pressure on the inside is completely released through the gap. The threaded adjustment ring 104 is rotated, and the position of the threaded adjustment ring 104 on the outside of the threaded connecting rod 102 is adjusted through the threaded cooperation between the threaded adjustment ring 104 and the threaded connecting rod 102, thereby adjusting the distance between the swing seat 101 and the threaded adjustment ring 104, and adjusting the compression ratio of the compression spring 103, thereby adjusting the opening pressure of the movable baffle 51.

[0050] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0051] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A switch cabinet with a pressure relief protection structure, characterized in that: The switch cabinet comprises a cabinet body (1), a front cabinet door (3) and a rear cabinet door (7) are respectively installed on both sides of the cabinet body (1), wherein a pressure relief mechanism is also installed on the front cabinet door (3); The pressure relief mechanism comprises an outer frame (4) fixedly connected to the front cabinet door (3), an intermediate baffle (5) is placed in the outer frame (4), two ends of the intermediate baffle (5) are movably connected to side baffles (6), and the intermediate baffle (5) is movably connected to the outer frame (4) through the side baffles (6); The middle baffle (5) comprises a movable baffle (51) inserted into the outer frame (4); shaft sleeves connected to the side baffles (6) are integrally provided at both ends of the movable baffle (51); a pin shaft rod corresponding to the shaft sleeve is provided at the end of the side baffle (6); and the side baffle (6) is movably connected to the movable baffle (51) through a rotational connection between the pin shaft rod and the shaft sleeve; The end of the side baffle (6) away from the movable baffle (51) is symmetrically fixedly connected with a cylindrical slider (62), and sliding grooves corresponding to the cylindrical slider (62) are opened on both sides of the outer frame (4), and the cylindrical slider (62) is inserted into the sliding groove and slidably connected with the sliding groove.

2. The switch cabinet with a pressure relief protection structure according to claim 1, characterized in that: A pressure relief airway (54) is provided on one side of the movable baffle (51), and the pressure relief airway (54) has a longitudinal groove and a plurality of transverse grooves, wherein the transverse grooves are symmetrically distributed on both sides of the longitudinal groove, and one end of the transverse groove is connected to the longitudinal groove, and the other end extends to the side of the movable baffle (51); A reinforcing rib (52) is fixedly connected to the other side of the movable baffle (51), and both ends of the reinforcing rib (52) are fixedly connected to a manual pressure relief handle (53).

3. The switch cabinet with a pressure relief protection structure according to claim 1, characterized in that: A fixing frame (9) is symmetrically fixedly connected to the side surface of the outer frame (4), and the fixing frame (9) is located on one side of the side baffle (6). A connecting ear plate (61) corresponding to the fixing frame (9) is also integrally provided on the side baffle (6).

4. The switch cabinet with a pressure relief protection structure according to claim 3 is characterized in that: The fixing frame (9) comprises a support plate (91) whose two ends are fixedly connected to the outer frame (4), and a mounting groove (92) is provided in the middle of the support plate (91), and circular hole plates integral with the support plate (91) are provided on both sides of the mounting groove (92).

5. The switch cabinet with a pressure relief protection structure according to claim 4, characterized in that: A pressure reset structure (10) is movably connected in the mounting groove (92), and an end of the pressure reset structure (10) passes through the mounting groove (92) and is movably connected to the side baffle (6), wherein the pressure reset structure (10) includes a swing seat (101) placed in the mounting groove (92), and protrusions that are plugged into the circular orifice plate are integrally provided at both ends of the swing seat (101).

6. The switch cabinet with a pressure relief protection structure according to claim 5, characterized in that: The inner side of the swing seat (101) is threadedly connected to a threaded connecting rod (102), one end of the threaded connecting rod (102) is movably connected to a connecting ear plate (61) on the side of the side baffle (6) via a pin, and the other end of the threaded connecting rod (102) passes through the swing seat (101) and is threadedly matched with a threaded adjustment ring (104).

7. The switch cabinet with a pressure relief protection structure according to claim 6, characterized in that: The end of the threaded connecting rod (102) is also sleeved with a compression spring (103), and the two ends of the compression spring (103) are respectively fitted with the swing seat (101) and the threaded adjustment ring (104).

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